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Diffstat (limited to 'gdb/remote.c')
| -rw-r--r-- | gdb/remote.c | 6161 |
1 files changed, 0 insertions, 6161 deletions
diff --git a/gdb/remote.c b/gdb/remote.c deleted file mode 100644 index 688024d7f0f..00000000000 --- a/gdb/remote.c +++ /dev/null @@ -1,6161 +0,0 @@ -/* Remote target communications for serial-line targets in custom GDB protocol - - Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, - 1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -/* See the GDB User Guide for details of the GDB remote protocol. */ - -#include "defs.h" -#include "gdb_string.h" -#include <ctype.h> -#include <fcntl.h> -#include "inferior.h" -#include "bfd.h" -#include "symfile.h" -#include "target.h" -/*#include "terminal.h" */ -#include "gdbcmd.h" -#include "objfiles.h" -#include "gdb-stabs.h" -#include "gdbthread.h" -#include "remote.h" -#include "regcache.h" -#include "value.h" -#include "gdb_assert.h" - -#include <ctype.h> -#include <sys/time.h> -#ifdef USG -#include <sys/types.h> -#endif - -#include "event-loop.h" -#include "event-top.h" -#include "inf-loop.h" - -#include <signal.h> -#include "serial.h" - -#include "gdbcore.h" /* for exec_bfd */ - -/* Prototypes for local functions */ -static void cleanup_sigint_signal_handler (void *dummy); -static void initialize_sigint_signal_handler (void); -static int getpkt_sane (char *buf, long sizeof_buf, int forever); - -static void handle_remote_sigint (int); -static void handle_remote_sigint_twice (int); -static void async_remote_interrupt (gdb_client_data); -void async_remote_interrupt_twice (gdb_client_data); - -static void build_remote_gdbarch_data (void); - -static int remote_write_bytes (CORE_ADDR memaddr, char *myaddr, int len); - -static int remote_read_bytes (CORE_ADDR memaddr, char *myaddr, int len); - -static void remote_files_info (struct target_ops *ignore); - -static int remote_xfer_memory (CORE_ADDR memaddr, char *myaddr, - int len, int should_write, - struct mem_attrib *attrib, - struct target_ops *target); - -static void remote_prepare_to_store (void); - -static void remote_fetch_registers (int regno); - -static void remote_resume (ptid_t ptid, int step, - enum target_signal siggnal); -static void remote_async_resume (ptid_t ptid, int step, - enum target_signal siggnal); -static int remote_start_remote (PTR); - -static void remote_open (char *name, int from_tty); -static void remote_async_open (char *name, int from_tty); - -static void extended_remote_open (char *name, int from_tty); -static void extended_remote_async_open (char *name, int from_tty); - -static void remote_open_1 (char *, int, struct target_ops *, int extended_p); -static void remote_async_open_1 (char *, int, struct target_ops *, - int extended_p); - -static void remote_close (int quitting); - -static void remote_store_registers (int regno); - -static void remote_mourn (void); -static void remote_async_mourn (void); - -static void extended_remote_restart (void); - -static void extended_remote_mourn (void); - -static void extended_remote_create_inferior (char *, char *, char **); -static void extended_remote_async_create_inferior (char *, char *, char **); - -static void remote_mourn_1 (struct target_ops *); - -static void remote_send (char *buf, long sizeof_buf); - -static int readchar (int timeout); - -static ptid_t remote_wait (ptid_t ptid, - struct target_waitstatus *status); -static ptid_t remote_async_wait (ptid_t ptid, - struct target_waitstatus *status); - -static void remote_kill (void); -static void remote_async_kill (void); - -static int tohex (int nib); - -static void remote_detach (char *args, int from_tty); -static void remote_async_detach (char *args, int from_tty); - -static void remote_interrupt (int signo); - -static void remote_interrupt_twice (int signo); - -static void interrupt_query (void); - -static void set_thread (int, int); - -static int remote_thread_alive (ptid_t); - -static void get_offsets (void); - -static long read_frame (char *buf, long sizeof_buf); - -static int remote_insert_breakpoint (CORE_ADDR, char *); - -static int remote_remove_breakpoint (CORE_ADDR, char *); - -static int hexnumlen (ULONGEST num); - -static void init_remote_ops (void); - -static void init_extended_remote_ops (void); - -static void init_remote_cisco_ops (void); - -static struct target_ops remote_cisco_ops; - -static void remote_stop (void); - -static int ishex (int ch, int *val); - -static int stubhex (int ch); - -static int remote_query (int /*char */ , char *, char *, int *); - -static int hexnumstr (char *, ULONGEST); - -static int hexnumnstr (char *, ULONGEST, int); - -static CORE_ADDR remote_address_masked (CORE_ADDR); - -static void print_packet (char *); - -static unsigned long crc32 (unsigned char *, int, unsigned int); - -static void compare_sections_command (char *, int); - -static void packet_command (char *, int); - -static int stub_unpack_int (char *buff, int fieldlength); - -static ptid_t remote_current_thread (ptid_t oldptid); - -static void remote_find_new_threads (void); - -static void record_currthread (int currthread); - -static int fromhex (int a); - -static int hex2bin (const char *hex, char *bin, int count); - -static int bin2hex (const char *bin, char *hex, int count); - -static int putpkt_binary (char *buf, int cnt); - -static void check_binary_download (CORE_ADDR addr); - -struct packet_config; - -static void show_packet_config_cmd (struct packet_config *config); - -static void update_packet_config (struct packet_config *config); - -/* Define the target subroutine names */ - -void open_remote_target (char *, int, struct target_ops *, int); - -void _initialize_remote (void); - -/* Description of the remote protocol. Strictly speeking, when the - target is open()ed, remote.c should create a per-target description - of the remote protocol using that target's architecture. - Unfortunatly, the target stack doesn't include local state. For - the moment keep the information in the target's architecture - object. Sigh.. */ - -struct packet_reg -{ - long offset; /* Offset into G packet. */ - long regnum; /* GDB's internal register number. */ - LONGEST pnum; /* Remote protocol register number. */ - int in_g_packet; /* Always part of G packet. */ - /* long size in bytes; == REGISTER_RAW_SIZE (regnum); at present. */ - /* char *name; == REGISTER_NAME (regnum); at present. */ -}; - -struct remote_state -{ - /* Description of the remote protocol registers. */ - long sizeof_g_packet; - - /* Description of the remote protocol registers indexed by REGNUM - (making an array of NUM_REGS + NUM_PSEUDO_REGS in size). */ - struct packet_reg *regs; - - /* This is the size (in chars) of the first response to the ``g'' - packet. It is used as a heuristic when determining the maximum - size of memory-read and memory-write packets. A target will - typically only reserve a buffer large enough to hold the ``g'' - packet. The size does not include packet overhead (headers and - trailers). */ - long actual_register_packet_size; - - /* This is the maximum size (in chars) of a non read/write packet. - It is also used as a cap on the size of read/write packets. */ - long remote_packet_size; -}; - -/* Handle for retreving the remote protocol data from gdbarch. */ -static struct gdbarch_data *remote_gdbarch_data_handle; - -static struct remote_state * -get_remote_state () -{ - return gdbarch_data (remote_gdbarch_data_handle); -} - -static void * -init_remote_state (struct gdbarch *gdbarch) -{ - int regnum; - struct remote_state *rs = xmalloc (sizeof (struct remote_state)); - - /* Start out by having the remote protocol mimic the existing - behavour - just copy in the description of the register cache. */ - rs->sizeof_g_packet = REGISTER_BYTES; /* OK use. */ - - /* Assume a 1:1 regnum<->pnum table. */ - rs->regs = xcalloc (NUM_REGS + NUM_PSEUDO_REGS, sizeof (struct packet_reg)); - for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) - { - struct packet_reg *r = &rs->regs[regnum]; - r->pnum = regnum; - r->regnum = regnum; - r->offset = REGISTER_BYTE (regnum); - r->in_g_packet = (regnum < NUM_REGS); - /* ...size = REGISTER_RAW_SIZE (regnum); */ - /* ...name = REGISTER_NAME (regnum); */ - } - - /* Default maximum number of characters in a packet body. Many - remote stubs have a hardwired buffer size of 400 bytes - (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used - as the maximum packet-size to ensure that the packet and an extra - NUL character can always fit in the buffer. This stops GDB - trashing stubs that try to squeeze an extra NUL into what is - already a full buffer (As of 1999-12-04 that was most stubs. */ - rs->remote_packet_size = 400 - 1; - - /* Should rs->sizeof_g_packet needs more space than the - default, adjust the size accordingly. Remember that each byte is - encoded as two characters. 32 is the overhead for the packet - header / footer. NOTE: cagney/1999-10-26: I suspect that 8 - (``$NN:G...#NN'') is a better guess, the below has been padded a - little. */ - if (rs->sizeof_g_packet > ((rs->remote_packet_size - 32) / 2)) - rs->remote_packet_size = (rs->sizeof_g_packet * 2 + 32); - - /* This one is filled in when a ``g'' packet is received. */ - rs->actual_register_packet_size = 0; - - return rs; -} - -static void -free_remote_state (struct gdbarch *gdbarch, void *pointer) -{ - struct remote_state *data = pointer; - xfree (data->regs); - xfree (data); -} - -static struct packet_reg * -packet_reg_from_regnum (struct remote_state *rs, long regnum) -{ - if (regnum < 0 && regnum >= NUM_REGS + NUM_PSEUDO_REGS) - return NULL; - else - { - struct packet_reg *r = &rs->regs[regnum]; - gdb_assert (r->regnum == regnum); - return r; - } -} - -static struct packet_reg * -packet_reg_from_pnum (struct remote_state *rs, LONGEST pnum) -{ - int i; - for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++) - { - struct packet_reg *r = &rs->regs[i]; - if (r->pnum == pnum) - return r; - } - return NULL; -} - -/* */ - -static struct target_ops remote_ops; - -static struct target_ops extended_remote_ops; - -/* Temporary target ops. Just like the remote_ops and - extended_remote_ops, but with asynchronous support. */ -static struct target_ops remote_async_ops; - -static struct target_ops extended_async_remote_ops; - -/* FIXME: cagney/1999-09-23: Even though getpkt was called with - ``forever'' still use the normal timeout mechanism. This is - currently used by the ASYNC code to guarentee that target reads - during the initial connect always time-out. Once getpkt has been - modified to return a timeout indication and, in turn - remote_wait()/wait_for_inferior() have gained a timeout parameter - this can go away. */ -static int wait_forever_enabled_p = 1; - - -/* This variable chooses whether to send a ^C or a break when the user - requests program interruption. Although ^C is usually what remote - systems expect, and that is the default here, sometimes a break is - preferable instead. */ - -static int remote_break; - -/* Descriptor for I/O to remote machine. Initialize it to NULL so that - remote_open knows that we don't have a file open when the program - starts. */ -static struct serial *remote_desc = NULL; - -/* This is set by the target (thru the 'S' message) - to denote that the target is in kernel mode. */ -static int cisco_kernel_mode = 0; - -/* This variable sets the number of bits in an address that are to be - sent in a memory ("M" or "m") packet. Normally, after stripping - leading zeros, the entire address would be sent. This variable - restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The - initial implementation of remote.c restricted the address sent in - memory packets to ``host::sizeof long'' bytes - (typically 32 - bits). Consequently, for 64 bit targets, the upper 32 bits of an - address was never sent. Since fixing this bug may cause a break in - some remote targets this variable is principly provided to - facilitate backward compatibility. */ - -static int remote_address_size; - -/* Tempoary to track who currently owns the terminal. See - target_async_terminal_* for more details. */ - -static int remote_async_terminal_ours_p; - - -/* User configurable variables for the number of characters in a - memory read/write packet. MIN ((rs->remote_packet_size), - rs->sizeof_g_packet) is the default. Some targets need smaller - values (fifo overruns, et.al.) and some users need larger values - (speed up transfers). The variables ``preferred_*'' (the user - request), ``current_*'' (what was actually set) and ``forced_*'' - (Positive - a soft limit, negative - a hard limit). */ - -struct memory_packet_config -{ - char *name; - long size; - int fixed_p; -}; - -/* Compute the current size of a read/write packet. Since this makes - use of ``actual_register_packet_size'' the computation is dynamic. */ - -static long -get_memory_packet_size (struct memory_packet_config *config) -{ - struct remote_state *rs = get_remote_state (); - /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk - law?) that some hosts don't cope very well with large alloca() - calls. Eventually the alloca() code will be replaced by calls to - xmalloc() and make_cleanups() allowing this restriction to either - be lifted or removed. */ -#ifndef MAX_REMOTE_PACKET_SIZE -#define MAX_REMOTE_PACKET_SIZE 16384 -#endif - /* NOTE: 16 is just chosen at random. */ -#ifndef MIN_REMOTE_PACKET_SIZE -#define MIN_REMOTE_PACKET_SIZE 16 -#endif - long what_they_get; - if (config->fixed_p) - { - if (config->size <= 0) - what_they_get = MAX_REMOTE_PACKET_SIZE; - else - what_they_get = config->size; - } - else - { - what_they_get = (rs->remote_packet_size); - /* Limit the packet to the size specified by the user. */ - if (config->size > 0 - && what_they_get > config->size) - what_they_get = config->size; - /* Limit it to the size of the targets ``g'' response. */ - if ((rs->actual_register_packet_size) > 0 - && what_they_get > (rs->actual_register_packet_size)) - what_they_get = (rs->actual_register_packet_size); - } - if (what_they_get > MAX_REMOTE_PACKET_SIZE) - what_they_get = MAX_REMOTE_PACKET_SIZE; - if (what_they_get < MIN_REMOTE_PACKET_SIZE) - what_they_get = MIN_REMOTE_PACKET_SIZE; - return what_they_get; -} - -/* Update the size of a read/write packet. If they user wants - something really big then do a sanity check. */ - -static void -set_memory_packet_size (char *args, struct memory_packet_config *config) -{ - int fixed_p = config->fixed_p; - long size = config->size; - if (args == NULL) - error ("Argument required (integer, `fixed' or `limited')."); - else if (strcmp (args, "hard") == 0 - || strcmp (args, "fixed") == 0) - fixed_p = 1; - else if (strcmp (args, "soft") == 0 - || strcmp (args, "limit") == 0) - fixed_p = 0; - else - { - char *end; - size = strtoul (args, &end, 0); - if (args == end) - error ("Invalid %s (bad syntax).", config->name); -#if 0 - /* Instead of explicitly capping the size of a packet to - MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is - instead allowed to set the size to something arbitrarily - large. */ - if (size > MAX_REMOTE_PACKET_SIZE) - error ("Invalid %s (too large).", config->name); -#endif - } - /* Extra checks? */ - if (fixed_p && !config->fixed_p) - { - if (! query ("The target may not be able to correctly handle a %s\n" - "of %ld bytes. Change the packet size? ", - config->name, size)) - error ("Packet size not changed."); - } - /* Update the config. */ - config->fixed_p = fixed_p; - config->size = size; -} - -static void -show_memory_packet_size (struct memory_packet_config *config) -{ - printf_filtered ("The %s is %ld. ", config->name, config->size); - if (config->fixed_p) - printf_filtered ("Packets are fixed at %ld bytes.\n", - get_memory_packet_size (config)); - else - printf_filtered ("Packets are limited to %ld bytes.\n", - get_memory_packet_size (config)); -} - -static struct memory_packet_config memory_write_packet_config = -{ - "memory-write-packet-size", -}; - -static void -set_memory_write_packet_size (char *args, int from_tty) -{ - set_memory_packet_size (args, &memory_write_packet_config); -} - -static void -show_memory_write_packet_size (char *args, int from_tty) -{ - show_memory_packet_size (&memory_write_packet_config); -} - -static long -get_memory_write_packet_size (void) -{ - return get_memory_packet_size (&memory_write_packet_config); -} - -static struct memory_packet_config memory_read_packet_config = -{ - "memory-read-packet-size", -}; - -static void -set_memory_read_packet_size (char *args, int from_tty) -{ - set_memory_packet_size (args, &memory_read_packet_config); -} - -static void -show_memory_read_packet_size (char *args, int from_tty) -{ - show_memory_packet_size (&memory_read_packet_config); -} - -static long -get_memory_read_packet_size (void) -{ - struct remote_state *rs = get_remote_state (); - long size = get_memory_packet_size (&memory_read_packet_config); - /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an - extra buffer size argument before the memory read size can be - increased beyond (rs->remote_packet_size). */ - if (size > (rs->remote_packet_size)) - size = (rs->remote_packet_size); - return size; -} - - -/* Generic configuration support for packets the stub optionally - supports. Allows the user to specify the use of the packet as well - as allowing GDB to auto-detect support in the remote stub. */ - -enum packet_support - { - PACKET_SUPPORT_UNKNOWN = 0, - PACKET_ENABLE, - PACKET_DISABLE - }; - -struct packet_config - { - char *name; - char *title; - enum cmd_auto_boolean detect; - enum packet_support support; - }; - -/* Analyze a packet's return value and update the packet config - accordingly. */ - -enum packet_result -{ - PACKET_ERROR, - PACKET_OK, - PACKET_UNKNOWN -}; - -static void -update_packet_config (struct packet_config *config) -{ - switch (config->detect) - { - case CMD_AUTO_BOOLEAN_TRUE: - config->support = PACKET_ENABLE; - break; - case CMD_AUTO_BOOLEAN_FALSE: - config->support = PACKET_DISABLE; - break; - case CMD_AUTO_BOOLEAN_AUTO: - config->support = PACKET_SUPPORT_UNKNOWN; - break; - } -} - -static void -show_packet_config_cmd (struct packet_config *config) -{ - char *support = "internal-error"; - switch (config->support) - { - case PACKET_ENABLE: - support = "enabled"; - break; - case PACKET_DISABLE: - support = "disabled"; - break; - case PACKET_SUPPORT_UNKNOWN: - support = "unknown"; - break; - } - switch (config->detect) - { - case CMD_AUTO_BOOLEAN_AUTO: - printf_filtered ("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n", - config->name, config->title, support); - break; - case CMD_AUTO_BOOLEAN_TRUE: - case CMD_AUTO_BOOLEAN_FALSE: - printf_filtered ("Support for remote protocol `%s' (%s) packet is currently %s.\n", - config->name, config->title, support); - break; - } -} - -static void -add_packet_config_cmd (struct packet_config *config, - char *name, - char *title, - void (*set_func) (char *args, int from_tty, - struct cmd_list_element * - c), - void (*show_func) (char *name, - int from_tty), - struct cmd_list_element **set_remote_list, - struct cmd_list_element **show_remote_list, - int legacy) -{ - struct cmd_list_element *set_cmd; - struct cmd_list_element *show_cmd; - char *set_doc; - char *show_doc; - char *cmd_name; - config->name = name; - config->title = title; - config->detect = CMD_AUTO_BOOLEAN_AUTO; - config->support = PACKET_SUPPORT_UNKNOWN; - xasprintf (&set_doc, "Set use of remote protocol `%s' (%s) packet", - name, title); - xasprintf (&show_doc, "Show current use of remote protocol `%s' (%s) packet", - name, title); - /* set/show TITLE-packet {auto,on,off} */ - xasprintf (&cmd_name, "%s-packet", title); - set_cmd = add_set_auto_boolean_cmd (cmd_name, class_obscure, - &config->detect, set_doc, - set_remote_list); - set_cmd_sfunc (set_cmd, set_func); - show_cmd = add_cmd (cmd_name, class_obscure, show_func, show_doc, - show_remote_list); - /* set/show remote NAME-packet {auto,on,off} -- legacy */ - if (legacy) - { - char *legacy_name; - xasprintf (&legacy_name, "%s-packet", name); - add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, - set_remote_list); - add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, - show_remote_list); - } -} - -static enum packet_result -packet_ok (const char *buf, struct packet_config *config) -{ - if (buf[0] != '\0') - { - /* The stub recognized the packet request. Check that the - operation succeeded. */ - switch (config->support) - { - case PACKET_SUPPORT_UNKNOWN: - if (remote_debug) - fprintf_unfiltered (gdb_stdlog, - "Packet %s (%s) is supported\n", - config->name, config->title); - config->support = PACKET_ENABLE; - break; - case PACKET_DISABLE: - internal_error (__FILE__, __LINE__, - "packet_ok: attempt to use a disabled packet"); - break; - case PACKET_ENABLE: - break; - } - if (buf[0] == 'O' && buf[1] == 'K' && buf[2] == '\0') - /* "OK" - definitly OK. */ - return PACKET_OK; - if (buf[0] == 'E' - && isxdigit (buf[1]) && isxdigit (buf[2]) - && buf[3] == '\0') - /* "Enn" - definitly an error. */ - return PACKET_ERROR; - /* The packet may or may not be OK. Just assume it is */ - return PACKET_OK; - } - else - { - /* The stub does not support the packet. */ - switch (config->support) - { - case PACKET_ENABLE: - if (config->detect == CMD_AUTO_BOOLEAN_AUTO) - /* If the stub previously indicated that the packet was - supported then there is a protocol error.. */ - error ("Protocol error: %s (%s) conflicting enabled responses.", - config->name, config->title); - else - /* The user set it wrong. */ - error ("Enabled packet %s (%s) not recognized by stub", - config->name, config->title); - break; - case PACKET_SUPPORT_UNKNOWN: - if (remote_debug) - fprintf_unfiltered (gdb_stdlog, - "Packet %s (%s) is NOT supported\n", - config->name, config->title); - config->support = PACKET_DISABLE; - break; - case PACKET_DISABLE: - break; - } - return PACKET_UNKNOWN; - } -} - -/* Should we try the 'qSymbol' (target symbol lookup service) request? */ -static struct packet_config remote_protocol_qSymbol; - -static void -set_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty, - struct cmd_list_element *c) -{ - update_packet_config (&remote_protocol_qSymbol); -} - -static void -show_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty) -{ - show_packet_config_cmd (&remote_protocol_qSymbol); -} - -/* Should we try the 'e' (step over range) request? */ -static struct packet_config remote_protocol_e; - -static void -set_remote_protocol_e_packet_cmd (char *args, int from_tty, - struct cmd_list_element *c) -{ - update_packet_config (&remote_protocol_e); -} - -static void -show_remote_protocol_e_packet_cmd (char *args, int from_tty) -{ - show_packet_config_cmd (&remote_protocol_e); -} - - -/* Should we try the 'E' (step over range / w signal #) request? */ -static struct packet_config remote_protocol_E; - -static void -set_remote_protocol_E_packet_cmd (char *args, int from_tty, - struct cmd_list_element *c) -{ - update_packet_config (&remote_protocol_E); -} - -static void -show_remote_protocol_E_packet_cmd (char *args, int from_tty) -{ - show_packet_config_cmd (&remote_protocol_E); -} - - -/* Should we try the 'P' (set register) request? */ - -static struct packet_config remote_protocol_P; - -static void -set_remote_protocol_P_packet_cmd (char *args, int from_tty, - struct cmd_list_element *c) -{ - update_packet_config (&remote_protocol_P); -} - -static void -show_remote_protocol_P_packet_cmd (char *args, int from_tty) -{ - show_packet_config_cmd (&remote_protocol_P); -} - -/* Should we try one of the 'Z' requests? */ - -enum Z_packet_type -{ - Z_PACKET_SOFTWARE_BP, - Z_PACKET_HARDWARE_BP, - Z_PACKET_WRITE_WP, - Z_PACKET_READ_WP, - Z_PACKET_ACCESS_WP, - NR_Z_PACKET_TYPES -}; - -static struct packet_config remote_protocol_Z[NR_Z_PACKET_TYPES]; - -/* FIXME: Instead of having all these boiler plate functions, the - command callback should include a context argument. */ - -static void -set_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty, - struct cmd_list_element *c) -{ - update_packet_config (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]); -} - -static void -show_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty) -{ - show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]); -} - -static void -set_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty, - struct cmd_list_element *c) -{ - update_packet_config (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]); -} - -static void -show_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty) -{ - show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]); -} - -static void -set_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty, - struct cmd_list_element *c) -{ - update_packet_config (&remote_protocol_Z[Z_PACKET_WRITE_WP]); -} - -static void -show_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty) -{ - show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP]); -} - -static void -set_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty, - struct cmd_list_element *c) -{ - update_packet_config (&remote_protocol_Z[Z_PACKET_READ_WP]); -} - -static void -show_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty) -{ - show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP]); -} - -static void -set_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty, - struct cmd_list_element *c) -{ - update_packet_config (&remote_protocol_Z[Z_PACKET_ACCESS_WP]); -} - -static void -show_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty) -{ - show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP]); -} - -/* For compatibility with older distributions. Provide a ``set remote - Z-packet ...'' command that updates all the Z packet types. */ - -static enum cmd_auto_boolean remote_Z_packet_detect; - -static void -set_remote_protocol_Z_packet_cmd (char *args, int from_tty, - struct cmd_list_element *c) -{ - int i; - for (i = 0; i < NR_Z_PACKET_TYPES; i++) - { - remote_protocol_Z[i].detect = remote_Z_packet_detect; - update_packet_config (&remote_protocol_Z[i]); - } -} - -static void -show_remote_protocol_Z_packet_cmd (char *args, int from_tty) -{ - int i; - for (i = 0; i < NR_Z_PACKET_TYPES; i++) - { - show_packet_config_cmd (&remote_protocol_Z[i]); - } -} - -/* Should we try the 'X' (remote binary download) packet? - - This variable (available to the user via "set remote X-packet") - dictates whether downloads are sent in binary (via the 'X' packet). - We assume that the stub can, and attempt to do it. This will be - cleared if the stub does not understand it. This switch is still - needed, though in cases when the packet is supported in the stub, - but the connection does not allow it (i.e., 7-bit serial connection - only). */ - -static struct packet_config remote_protocol_binary_download; - -/* Should we try the 'ThreadInfo' query packet? - - This variable (NOT available to the user: auto-detect only!) - determines whether GDB will use the new, simpler "ThreadInfo" - query or the older, more complex syntax for thread queries. - This is an auto-detect variable (set to true at each connect, - and set to false when the target fails to recognize it). */ - -static int use_threadinfo_query; -static int use_threadextra_query; - -static void -set_remote_protocol_binary_download_cmd (char *args, - int from_tty, - struct cmd_list_element *c) -{ - update_packet_config (&remote_protocol_binary_download); -} - -static void -show_remote_protocol_binary_download_cmd (char *args, - int from_tty) -{ - show_packet_config_cmd (&remote_protocol_binary_download); -} - - -/* Tokens for use by the asynchronous signal handlers for SIGINT */ -PTR sigint_remote_twice_token; -PTR sigint_remote_token; - -/* These are pointers to hook functions that may be set in order to - modify resume/wait behavior for a particular architecture. */ - -void (*target_resume_hook) (void); -void (*target_wait_loop_hook) (void); - - - -/* These are the threads which we last sent to the remote system. - -1 for all or -2 for not sent yet. */ -static int general_thread; -static int continue_thread; - -/* Call this function as a result of - 1) A halt indication (T packet) containing a thread id - 2) A direct query of currthread - 3) Successful execution of set thread - */ - -static void -record_currthread (int currthread) -{ - general_thread = currthread; - - /* If this is a new thread, add it to GDB's thread list. - If we leave it up to WFI to do this, bad things will happen. */ - if (!in_thread_list (pid_to_ptid (currthread))) - { - add_thread (pid_to_ptid (currthread)); - ui_out_text (uiout, "[New "); - ui_out_text (uiout, target_pid_to_str (pid_to_ptid (currthread))); - ui_out_text (uiout, "]\n"); - } -} - -#define MAGIC_NULL_PID 42000 - -static void -set_thread (int th, int gen) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - int state = gen ? general_thread : continue_thread; - - if (state == th) - return; - - buf[0] = 'H'; - buf[1] = gen ? 'g' : 'c'; - if (th == MAGIC_NULL_PID) - { - buf[2] = '0'; - buf[3] = '\0'; - } - else if (th < 0) - sprintf (&buf[2], "-%x", -th); - else - sprintf (&buf[2], "%x", th); - putpkt (buf); - getpkt (buf, (rs->remote_packet_size), 0); - if (gen) - general_thread = th; - else - continue_thread = th; -} - -/* Return nonzero if the thread TH is still alive on the remote system. */ - -static int -remote_thread_alive (ptid_t ptid) -{ - int tid = PIDGET (ptid); - char buf[16]; - - if (tid < 0) - sprintf (buf, "T-%08x", -tid); - else - sprintf (buf, "T%08x", tid); - putpkt (buf); - getpkt (buf, sizeof (buf), 0); - return (buf[0] == 'O' && buf[1] == 'K'); -} - -/* About these extended threadlist and threadinfo packets. They are - variable length packets but, the fields within them are often fixed - length. They are redundent enough to send over UDP as is the - remote protocol in general. There is a matching unit test module - in libstub. */ - -#define OPAQUETHREADBYTES 8 - -/* a 64 bit opaque identifier */ -typedef unsigned char threadref[OPAQUETHREADBYTES]; - -/* WARNING: This threadref data structure comes from the remote O.S., libstub - protocol encoding, and remote.c. it is not particularly changable */ - -/* Right now, the internal structure is int. We want it to be bigger. - Plan to fix this. - */ - -typedef int gdb_threadref; /* internal GDB thread reference */ - -/* gdb_ext_thread_info is an internal GDB data structure which is - equivalint to the reply of the remote threadinfo packet */ - -struct gdb_ext_thread_info - { - threadref threadid; /* External form of thread reference */ - int active; /* Has state interesting to GDB? , regs, stack */ - char display[256]; /* Brief state display, name, blocked/syspended */ - char shortname[32]; /* To be used to name threads */ - char more_display[256]; /* Long info, statistics, queue depth, whatever */ - }; - -/* The volume of remote transfers can be limited by submitting - a mask containing bits specifying the desired information. - Use a union of these values as the 'selection' parameter to - get_thread_info. FIXME: Make these TAG names more thread specific. - */ - -#define TAG_THREADID 1 -#define TAG_EXISTS 2 -#define TAG_DISPLAY 4 -#define TAG_THREADNAME 8 -#define TAG_MOREDISPLAY 16 - -#define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2) - -char *unpack_varlen_hex (char *buff, int *result); - -static char *unpack_nibble (char *buf, int *val); - -static char *pack_nibble (char *buf, int nibble); - -static char *pack_hex_byte (char *pkt, int /*unsigned char */ byte); - -static char *unpack_byte (char *buf, int *value); - -static char *pack_int (char *buf, int value); - -static char *unpack_int (char *buf, int *value); - -static char *unpack_string (char *src, char *dest, int length); - -static char *pack_threadid (char *pkt, threadref * id); - -static char *unpack_threadid (char *inbuf, threadref * id); - -void int_to_threadref (threadref * id, int value); - -static int threadref_to_int (threadref * ref); - -static void copy_threadref (threadref * dest, threadref * src); - -static int threadmatch (threadref * dest, threadref * src); - -static char *pack_threadinfo_request (char *pkt, int mode, threadref * id); - -static int remote_unpack_thread_info_response (char *pkt, - threadref * expectedref, - struct gdb_ext_thread_info - *info); - - -static int remote_get_threadinfo (threadref * threadid, int fieldset, /*TAG mask */ - struct gdb_ext_thread_info *info); - -static int adapt_remote_get_threadinfo (gdb_threadref * ref, - int selection, - struct gdb_ext_thread_info *info); - -static char *pack_threadlist_request (char *pkt, int startflag, - int threadcount, - threadref * nextthread); - -static int parse_threadlist_response (char *pkt, - int result_limit, - threadref * original_echo, - threadref * resultlist, int *doneflag); - -static int remote_get_threadlist (int startflag, - threadref * nextthread, - int result_limit, - int *done, - int *result_count, threadref * threadlist); - -typedef int (*rmt_thread_action) (threadref * ref, void *context); - -static int remote_threadlist_iterator (rmt_thread_action stepfunction, - void *context, int looplimit); - -static int remote_newthread_step (threadref * ref, void *context); - -/* encode 64 bits in 16 chars of hex */ - -static const char hexchars[] = "0123456789abcdef"; - -static int -ishex (int ch, int *val) -{ - if ((ch >= 'a') && (ch <= 'f')) - { - *val = ch - 'a' + 10; - return 1; - } - if ((ch >= 'A') && (ch <= 'F')) - { - *val = ch - 'A' + 10; - return 1; - } - if ((ch >= '0') && (ch <= '9')) - { - *val = ch - '0'; - return 1; - } - return 0; -} - -static int -stubhex (int ch) -{ - if (ch >= 'a' && ch <= 'f') - return ch - 'a' + 10; - if (ch >= '0' && ch <= '9') - return ch - '0'; - if (ch >= 'A' && ch <= 'F') - return ch - 'A' + 10; - return -1; -} - -static int -stub_unpack_int (char *buff, int fieldlength) -{ - int nibble; - int retval = 0; - - while (fieldlength) - { - nibble = stubhex (*buff++); - retval |= nibble; - fieldlength--; - if (fieldlength) - retval = retval << 4; - } - return retval; -} - -char * -unpack_varlen_hex (char *buff, /* packet to parse */ - int *result) -{ - int nibble; - int retval = 0; - - while (ishex (*buff, &nibble)) - { - buff++; - retval = retval << 4; - retval |= nibble & 0x0f; - } - *result = retval; - return buff; -} - -static char * -unpack_nibble (char *buf, int *val) -{ - ishex (*buf++, val); - return buf; -} - -static char * -pack_nibble (char *buf, int nibble) -{ - *buf++ = hexchars[(nibble & 0x0f)]; - return buf; -} - -static char * -pack_hex_byte (char *pkt, int byte) -{ - *pkt++ = hexchars[(byte >> 4) & 0xf]; - *pkt++ = hexchars[(byte & 0xf)]; - return pkt; -} - -static char * -unpack_byte (char *buf, int *value) -{ - *value = stub_unpack_int (buf, 2); - return buf + 2; -} - -static char * -pack_int (char *buf, int value) -{ - buf = pack_hex_byte (buf, (value >> 24) & 0xff); - buf = pack_hex_byte (buf, (value >> 16) & 0xff); - buf = pack_hex_byte (buf, (value >> 8) & 0x0ff); - buf = pack_hex_byte (buf, (value & 0xff)); - return buf; -} - -static char * -unpack_int (char *buf, int *value) -{ - *value = stub_unpack_int (buf, 8); - return buf + 8; -} - -#if 0 /* currently unused, uncomment when needed */ -static char *pack_string (char *pkt, char *string); - -static char * -pack_string (char *pkt, char *string) -{ - char ch; - int len; - - len = strlen (string); - if (len > 200) - len = 200; /* Bigger than most GDB packets, junk??? */ - pkt = pack_hex_byte (pkt, len); - while (len-- > 0) - { - ch = *string++; - if ((ch == '\0') || (ch == '#')) - ch = '*'; /* Protect encapsulation */ - *pkt++ = ch; - } - return pkt; -} -#endif /* 0 (unused) */ - -static char * -unpack_string (char *src, char *dest, int length) -{ - while (length--) - *dest++ = *src++; - *dest = '\0'; - return src; -} - -static char * -pack_threadid (char *pkt, threadref *id) -{ - char *limit; - unsigned char *altid; - - altid = (unsigned char *) id; - limit = pkt + BUF_THREAD_ID_SIZE; - while (pkt < limit) - pkt = pack_hex_byte (pkt, *altid++); - return pkt; -} - - -static char * -unpack_threadid (char *inbuf, threadref *id) -{ - char *altref; - char *limit = inbuf + BUF_THREAD_ID_SIZE; - int x, y; - - altref = (char *) id; - - while (inbuf < limit) - { - x = stubhex (*inbuf++); - y = stubhex (*inbuf++); - *altref++ = (x << 4) | y; - } - return inbuf; -} - -/* Externally, threadrefs are 64 bits but internally, they are still - ints. This is due to a mismatch of specifications. We would like - to use 64bit thread references internally. This is an adapter - function. */ - -void -int_to_threadref (threadref *id, int value) -{ - unsigned char *scan; - - scan = (unsigned char *) id; - { - int i = 4; - while (i--) - *scan++ = 0; - } - *scan++ = (value >> 24) & 0xff; - *scan++ = (value >> 16) & 0xff; - *scan++ = (value >> 8) & 0xff; - *scan++ = (value & 0xff); -} - -static int -threadref_to_int (threadref *ref) -{ - int i, value = 0; - unsigned char *scan; - - scan = (char *) ref; - scan += 4; - i = 4; - while (i-- > 0) - value = (value << 8) | ((*scan++) & 0xff); - return value; -} - -static void -copy_threadref (threadref *dest, threadref *src) -{ - int i; - unsigned char *csrc, *cdest; - - csrc = (unsigned char *) src; - cdest = (unsigned char *) dest; - i = 8; - while (i--) - *cdest++ = *csrc++; -} - -static int -threadmatch (threadref *dest, threadref *src) -{ - /* things are broken right now, so just assume we got a match */ -#if 0 - unsigned char *srcp, *destp; - int i, result; - srcp = (char *) src; - destp = (char *) dest; - - result = 1; - while (i-- > 0) - result &= (*srcp++ == *destp++) ? 1 : 0; - return result; -#endif - return 1; -} - -/* - threadid:1, # always request threadid - context_exists:2, - display:4, - unique_name:8, - more_display:16 - */ - -/* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */ - -static char * -pack_threadinfo_request (char *pkt, int mode, threadref *id) -{ - *pkt++ = 'q'; /* Info Query */ - *pkt++ = 'P'; /* process or thread info */ - pkt = pack_int (pkt, mode); /* mode */ - pkt = pack_threadid (pkt, id); /* threadid */ - *pkt = '\0'; /* terminate */ - return pkt; -} - -/* These values tag the fields in a thread info response packet */ -/* Tagging the fields allows us to request specific fields and to - add more fields as time goes by */ - -#define TAG_THREADID 1 /* Echo the thread identifier */ -#define TAG_EXISTS 2 /* Is this process defined enough to - fetch registers and its stack */ -#define TAG_DISPLAY 4 /* A short thing maybe to put on a window */ -#define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */ -#define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about - the process */ - -static int -remote_unpack_thread_info_response (char *pkt, threadref *expectedref, - struct gdb_ext_thread_info *info) -{ - struct remote_state *rs = get_remote_state (); - int mask, length; - unsigned int tag; - threadref ref; - char *limit = pkt + (rs->remote_packet_size); /* plausable parsing limit */ - int retval = 1; - - /* info->threadid = 0; FIXME: implement zero_threadref */ - info->active = 0; - info->display[0] = '\0'; - info->shortname[0] = '\0'; - info->more_display[0] = '\0'; - - /* Assume the characters indicating the packet type have been stripped */ - pkt = unpack_int (pkt, &mask); /* arg mask */ - pkt = unpack_threadid (pkt, &ref); - - if (mask == 0) - warning ("Incomplete response to threadinfo request\n"); - if (!threadmatch (&ref, expectedref)) - { /* This is an answer to a different request */ - warning ("ERROR RMT Thread info mismatch\n"); - return 0; - } - copy_threadref (&info->threadid, &ref); - - /* Loop on tagged fields , try to bail if somthing goes wrong */ - - while ((pkt < limit) && mask && *pkt) /* packets are terminated with nulls */ - { - pkt = unpack_int (pkt, &tag); /* tag */ - pkt = unpack_byte (pkt, &length); /* length */ - if (!(tag & mask)) /* tags out of synch with mask */ - { - warning ("ERROR RMT: threadinfo tag mismatch\n"); - retval = 0; - break; - } - if (tag == TAG_THREADID) - { - if (length != 16) - { - warning ("ERROR RMT: length of threadid is not 16\n"); - retval = 0; - break; - } - pkt = unpack_threadid (pkt, &ref); - mask = mask & ~TAG_THREADID; - continue; - } - if (tag == TAG_EXISTS) - { - info->active = stub_unpack_int (pkt, length); - pkt += length; - mask = mask & ~(TAG_EXISTS); - if (length > 8) - { - warning ("ERROR RMT: 'exists' length too long\n"); - retval = 0; - break; - } - continue; - } - if (tag == TAG_THREADNAME) - { - pkt = unpack_string (pkt, &info->shortname[0], length); - mask = mask & ~TAG_THREADNAME; - continue; - } - if (tag == TAG_DISPLAY) - { - pkt = unpack_string (pkt, &info->display[0], length); - mask = mask & ~TAG_DISPLAY; - continue; - } - if (tag == TAG_MOREDISPLAY) - { - pkt = unpack_string (pkt, &info->more_display[0], length); - mask = mask & ~TAG_MOREDISPLAY; - continue; - } - warning ("ERROR RMT: unknown thread info tag\n"); - break; /* Not a tag we know about */ - } - return retval; -} - -static int -remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */ - struct gdb_ext_thread_info *info) -{ - struct remote_state *rs = get_remote_state (); - int result; - char *threadinfo_pkt = alloca (rs->remote_packet_size); - - pack_threadinfo_request (threadinfo_pkt, fieldset, threadid); - putpkt (threadinfo_pkt); - getpkt (threadinfo_pkt, (rs->remote_packet_size), 0); - result = remote_unpack_thread_info_response (threadinfo_pkt + 2, threadid, - info); - return result; -} - -/* Unfortunately, 61 bit thread-ids are bigger than the internal - representation of a threadid. */ - -static int -adapt_remote_get_threadinfo (gdb_threadref *ref, int selection, - struct gdb_ext_thread_info *info) -{ - threadref lclref; - - int_to_threadref (&lclref, *ref); - return remote_get_threadinfo (&lclref, selection, info); -} - -/* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */ - -static char * -pack_threadlist_request (char *pkt, int startflag, int threadcount, - threadref *nextthread) -{ - *pkt++ = 'q'; /* info query packet */ - *pkt++ = 'L'; /* Process LIST or threadLIST request */ - pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */ - pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */ - pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */ - *pkt = '\0'; - return pkt; -} - -/* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */ - -static int -parse_threadlist_response (char *pkt, int result_limit, - threadref *original_echo, threadref *resultlist, - int *doneflag) -{ - struct remote_state *rs = get_remote_state (); - char *limit; - int count, resultcount, done; - - resultcount = 0; - /* Assume the 'q' and 'M chars have been stripped. */ - limit = pkt + ((rs->remote_packet_size) - BUF_THREAD_ID_SIZE); /* done parse past here */ - pkt = unpack_byte (pkt, &count); /* count field */ - pkt = unpack_nibble (pkt, &done); - /* The first threadid is the argument threadid. */ - pkt = unpack_threadid (pkt, original_echo); /* should match query packet */ - while ((count-- > 0) && (pkt < limit)) - { - pkt = unpack_threadid (pkt, resultlist++); - if (resultcount++ >= result_limit) - break; - } - if (doneflag) - *doneflag = done; - return resultcount; -} - -static int -remote_get_threadlist (int startflag, threadref *nextthread, int result_limit, - int *done, int *result_count, threadref *threadlist) -{ - struct remote_state *rs = get_remote_state (); - static threadref echo_nextthread; - char *threadlist_packet = alloca (rs->remote_packet_size); - char *t_response = alloca (rs->remote_packet_size); - int result = 1; - - /* Trancate result limit to be smaller than the packet size */ - if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= (rs->remote_packet_size)) - result_limit = ((rs->remote_packet_size) / BUF_THREAD_ID_SIZE) - 2; - - pack_threadlist_request (threadlist_packet, - startflag, result_limit, nextthread); - putpkt (threadlist_packet); - getpkt (t_response, (rs->remote_packet_size), 0); - - *result_count = - parse_threadlist_response (t_response + 2, result_limit, &echo_nextthread, - threadlist, done); - - if (!threadmatch (&echo_nextthread, nextthread)) - { - /* FIXME: This is a good reason to drop the packet */ - /* Possably, there is a duplicate response */ - /* Possabilities : - retransmit immediatly - race conditions - retransmit after timeout - yes - exit - wait for packet, then exit - */ - warning ("HMM: threadlist did not echo arg thread, dropping it\n"); - return 0; /* I choose simply exiting */ - } - if (*result_count <= 0) - { - if (*done != 1) - { - warning ("RMT ERROR : failed to get remote thread list\n"); - result = 0; - } - return result; /* break; */ - } - if (*result_count > result_limit) - { - *result_count = 0; - warning ("RMT ERROR: threadlist response longer than requested\n"); - return 0; - } - return result; -} - -/* This is the interface between remote and threads, remotes upper interface */ - -/* remote_find_new_threads retrieves the thread list and for each - thread in the list, looks up the thread in GDB's internal list, - ading the thread if it does not already exist. This involves - getting partial thread lists from the remote target so, polling the - quit_flag is required. */ - - -/* About this many threadisds fit in a packet. */ - -#define MAXTHREADLISTRESULTS 32 - -static int -remote_threadlist_iterator (rmt_thread_action stepfunction, void *context, - int looplimit) -{ - int done, i, result_count; - int startflag = 1; - int result = 1; - int loopcount = 0; - static threadref nextthread; - static threadref resultthreadlist[MAXTHREADLISTRESULTS]; - - done = 0; - while (!done) - { - if (loopcount++ > looplimit) - { - result = 0; - warning ("Remote fetch threadlist -infinite loop-\n"); - break; - } - if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS, - &done, &result_count, resultthreadlist)) - { - result = 0; - break; - } - /* clear for later iterations */ - startflag = 0; - /* Setup to resume next batch of thread references, set nextthread. */ - if (result_count >= 1) - copy_threadref (&nextthread, &resultthreadlist[result_count - 1]); - i = 0; - while (result_count--) - if (!(result = (*stepfunction) (&resultthreadlist[i++], context))) - break; - } - return result; -} - -static int -remote_newthread_step (threadref *ref, void *context) -{ - ptid_t ptid; - - ptid = pid_to_ptid (threadref_to_int (ref)); - - if (!in_thread_list (ptid)) - add_thread (ptid); - return 1; /* continue iterator */ -} - -#define CRAZY_MAX_THREADS 1000 - -static ptid_t -remote_current_thread (ptid_t oldpid) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - - putpkt ("qC"); - getpkt (buf, (rs->remote_packet_size), 0); - if (buf[0] == 'Q' && buf[1] == 'C') - return pid_to_ptid (strtol (&buf[2], NULL, 16)); - else - return oldpid; -} - -/* Find new threads for info threads command. - * Original version, using John Metzler's thread protocol. - */ - -static void -remote_find_new_threads (void) -{ - remote_threadlist_iterator (remote_newthread_step, 0, - CRAZY_MAX_THREADS); - if (PIDGET (inferior_ptid) == MAGIC_NULL_PID) /* ack ack ack */ - inferior_ptid = remote_current_thread (inferior_ptid); -} - -/* - * Find all threads for info threads command. - * Uses new thread protocol contributed by Cisco. - * Falls back and attempts to use the older method (above) - * if the target doesn't respond to the new method. - */ - -static void -remote_threads_info (void) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - char *bufp; - int tid; - - if (remote_desc == 0) /* paranoia */ - error ("Command can only be used when connected to the remote target."); - - if (use_threadinfo_query) - { - putpkt ("qfThreadInfo"); - bufp = buf; - getpkt (bufp, (rs->remote_packet_size), 0); - if (bufp[0] != '\0') /* q packet recognized */ - { - while (*bufp++ == 'm') /* reply contains one or more TID */ - { - do - { - tid = strtol (bufp, &bufp, 16); - if (tid != 0 && !in_thread_list (pid_to_ptid (tid))) - add_thread (pid_to_ptid (tid)); - } - while (*bufp++ == ','); /* comma-separated list */ - putpkt ("qsThreadInfo"); - bufp = buf; - getpkt (bufp, (rs->remote_packet_size), 0); - } - return; /* done */ - } - } - - /* Else fall back to old method based on jmetzler protocol. */ - use_threadinfo_query = 0; - remote_find_new_threads (); - return; -} - -/* - * Collect a descriptive string about the given thread. - * The target may say anything it wants to about the thread - * (typically info about its blocked / runnable state, name, etc.). - * This string will appear in the info threads display. - * - * Optional: targets are not required to implement this function. - */ - -static char * -remote_threads_extra_info (struct thread_info *tp) -{ - struct remote_state *rs = get_remote_state (); - int result; - int set; - threadref id; - struct gdb_ext_thread_info threadinfo; - static char display_buf[100]; /* arbitrary... */ - char *bufp = alloca (rs->remote_packet_size); - int n = 0; /* position in display_buf */ - - if (remote_desc == 0) /* paranoia */ - internal_error (__FILE__, __LINE__, - "remote_threads_extra_info"); - - if (use_threadextra_query) - { - sprintf (bufp, "qThreadExtraInfo,%x", PIDGET (tp->ptid)); - putpkt (bufp); - getpkt (bufp, (rs->remote_packet_size), 0); - if (bufp[0] != 0) - { - n = min (strlen (bufp) / 2, sizeof (display_buf)); - result = hex2bin (bufp, display_buf, n); - display_buf [result] = '\0'; - return display_buf; - } - } - - /* If the above query fails, fall back to the old method. */ - use_threadextra_query = 0; - set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME - | TAG_MOREDISPLAY | TAG_DISPLAY; - int_to_threadref (&id, PIDGET (tp->ptid)); - if (remote_get_threadinfo (&id, set, &threadinfo)) - if (threadinfo.active) - { - if (*threadinfo.shortname) - n += sprintf(&display_buf[0], " Name: %s,", threadinfo.shortname); - if (*threadinfo.display) - n += sprintf(&display_buf[n], " State: %s,", threadinfo.display); - if (*threadinfo.more_display) - n += sprintf(&display_buf[n], " Priority: %s", - threadinfo.more_display); - - if (n > 0) - { - /* for purely cosmetic reasons, clear up trailing commas */ - if (',' == display_buf[n-1]) - display_buf[n-1] = ' '; - return display_buf; - } - } - return NULL; -} - - - -/* Restart the remote side; this is an extended protocol operation. */ - -static void -extended_remote_restart (void) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - - /* Send the restart command; for reasons I don't understand the - remote side really expects a number after the "R". */ - buf[0] = 'R'; - sprintf (&buf[1], "%x", 0); - putpkt (buf); - - /* Now query for status so this looks just like we restarted - gdbserver from scratch. */ - putpkt ("?"); - getpkt (buf, (rs->remote_packet_size), 0); -} - -/* Clean up connection to a remote debugger. */ - -/* ARGSUSED */ -static void -remote_close (int quitting) -{ - if (remote_desc) - serial_close (remote_desc); - remote_desc = NULL; -} - -/* Query the remote side for the text, data and bss offsets. */ - -static void -get_offsets (void) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - char *ptr; - int lose; - CORE_ADDR text_addr, data_addr, bss_addr; - struct section_offsets *offs; - - putpkt ("qOffsets"); - - getpkt (buf, (rs->remote_packet_size), 0); - - if (buf[0] == '\000') - return; /* Return silently. Stub doesn't support - this command. */ - if (buf[0] == 'E') - { - warning ("Remote failure reply: %s", buf); - return; - } - - /* Pick up each field in turn. This used to be done with scanf, but - scanf will make trouble if CORE_ADDR size doesn't match - conversion directives correctly. The following code will work - with any size of CORE_ADDR. */ - text_addr = data_addr = bss_addr = 0; - ptr = buf; - lose = 0; - - if (strncmp (ptr, "Text=", 5) == 0) - { - ptr += 5; - /* Don't use strtol, could lose on big values. */ - while (*ptr && *ptr != ';') - text_addr = (text_addr << 4) + fromhex (*ptr++); - } - else - lose = 1; - - if (!lose && strncmp (ptr, ";Data=", 6) == 0) - { - ptr += 6; - while (*ptr && *ptr != ';') - data_addr = (data_addr << 4) + fromhex (*ptr++); - } - else - lose = 1; - - if (!lose && strncmp (ptr, ";Bss=", 5) == 0) - { - ptr += 5; - while (*ptr && *ptr != ';') - bss_addr = (bss_addr << 4) + fromhex (*ptr++); - } - else - lose = 1; - - if (lose) - error ("Malformed response to offset query, %s", buf); - - if (symfile_objfile == NULL) - return; - - offs = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); - memcpy (offs, symfile_objfile->section_offsets, SIZEOF_SECTION_OFFSETS); - - offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr; - - /* This is a temporary kludge to force data and bss to use the same offsets - because that's what nlmconv does now. The real solution requires changes - to the stub and remote.c that I don't have time to do right now. */ - - offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr; - offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr; - - objfile_relocate (symfile_objfile, offs); -} - -/* - * Cisco version of section offsets: - * - * Instead of having GDB query the target for the section offsets, - * Cisco lets the target volunteer the information! It's also in - * a different format, so here are the functions that will decode - * a section offset packet from a Cisco target. - */ - -/* - * Function: remote_cisco_section_offsets - * - * Returns: zero for success, non-zero for failure - */ - -static int -remote_cisco_section_offsets (bfd_vma text_addr, - bfd_vma data_addr, - bfd_vma bss_addr, - bfd_signed_vma *text_offs, - bfd_signed_vma *data_offs, - bfd_signed_vma *bss_offs) -{ - bfd_vma text_base, data_base, bss_base; - struct minimal_symbol *start; - asection *sect; - bfd *abfd; - int len; - - if (symfile_objfile == NULL) - return -1; /* no can do nothin' */ - - start = lookup_minimal_symbol ("_start", NULL, NULL); - if (start == NULL) - return -1; /* Can't find "_start" symbol */ - - data_base = bss_base = 0; - text_base = SYMBOL_VALUE_ADDRESS (start); - - abfd = symfile_objfile->obfd; - for (sect = abfd->sections; - sect != 0; - sect = sect->next) - { - const char *p = bfd_get_section_name (abfd, sect); - len = strlen (p); - if (strcmp (p + len - 4, "data") == 0) /* ends in "data" */ - if (data_base == 0 || - data_base > bfd_get_section_vma (abfd, sect)) - data_base = bfd_get_section_vma (abfd, sect); - if (strcmp (p + len - 3, "bss") == 0) /* ends in "bss" */ - if (bss_base == 0 || - bss_base > bfd_get_section_vma (abfd, sect)) - bss_base = bfd_get_section_vma (abfd, sect); - } - *text_offs = text_addr - text_base; - *data_offs = data_addr - data_base; - *bss_offs = bss_addr - bss_base; - if (remote_debug) - { - char tmp[128]; - - sprintf (tmp, "VMA: text = 0x"); - sprintf_vma (tmp + strlen (tmp), text_addr); - sprintf (tmp + strlen (tmp), " data = 0x"); - sprintf_vma (tmp + strlen (tmp), data_addr); - sprintf (tmp + strlen (tmp), " bss = 0x"); - sprintf_vma (tmp + strlen (tmp), bss_addr); - fprintf_filtered (gdb_stdlog, tmp); - fprintf_filtered (gdb_stdlog, - "Reloc offset: text = 0x%s data = 0x%s bss = 0x%s\n", - paddr_nz (*text_offs), - paddr_nz (*data_offs), - paddr_nz (*bss_offs)); - } - - return 0; -} - -/* - * Function: remote_cisco_objfile_relocate - * - * Relocate the symbol file for a remote target. - */ - -void -remote_cisco_objfile_relocate (bfd_signed_vma text_off, bfd_signed_vma data_off, - bfd_signed_vma bss_off) -{ - struct section_offsets *offs; - - if (text_off != 0 || data_off != 0 || bss_off != 0) - { - /* FIXME: This code assumes gdb-stabs.h is being used; it's - broken for xcoff, dwarf, sdb-coff, etc. But there is no - simple canonical representation for this stuff. */ - - offs = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); - memcpy (offs, symfile_objfile->section_offsets, SIZEOF_SECTION_OFFSETS); - - offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_off; - offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_off; - offs->offsets[SECT_OFF_BSS (symfile_objfile)] = bss_off; - - /* First call the standard objfile_relocate. */ - objfile_relocate (symfile_objfile, offs); - - /* Now we need to fix up the section entries already attached to - the exec target. These entries will control memory transfers - from the exec file. */ - - exec_set_section_offsets (text_off, data_off, bss_off); - } -} - -/* Stub for catch_errors. */ - -static int -remote_start_remote_dummy (void *dummy) -{ - start_remote (); /* Initialize gdb process mechanisms */ - return 1; -} - -static int -remote_start_remote (PTR dummy) -{ - immediate_quit++; /* Allow user to interrupt it */ - - /* Ack any packet which the remote side has already sent. */ - serial_write (remote_desc, "+", 1); - - /* Let the stub know that we want it to return the thread. */ - set_thread (-1, 0); - - inferior_ptid = remote_current_thread (inferior_ptid); - - get_offsets (); /* Get text, data & bss offsets */ - - putpkt ("?"); /* initiate a query from remote machine */ - immediate_quit--; - - return remote_start_remote_dummy (dummy); -} - -/* Open a connection to a remote debugger. - NAME is the filename used for communication. */ - -static void -remote_open (char *name, int from_tty) -{ - remote_open_1 (name, from_tty, &remote_ops, 0); -} - -/* Just like remote_open, but with asynchronous support. */ -static void -remote_async_open (char *name, int from_tty) -{ - remote_async_open_1 (name, from_tty, &remote_async_ops, 0); -} - -/* Open a connection to a remote debugger using the extended - remote gdb protocol. NAME is the filename used for communication. */ - -static void -extended_remote_open (char *name, int from_tty) -{ - remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */ ); -} - -/* Just like extended_remote_open, but with asynchronous support. */ -static void -extended_remote_async_open (char *name, int from_tty) -{ - remote_async_open_1 (name, from_tty, &extended_async_remote_ops, 1 /*extended_p */ ); -} - -/* Generic code for opening a connection to a remote target. */ - -static void -init_all_packet_configs (void) -{ - int i; - update_packet_config (&remote_protocol_e); - update_packet_config (&remote_protocol_E); - update_packet_config (&remote_protocol_P); - update_packet_config (&remote_protocol_qSymbol); - for (i = 0; i < NR_Z_PACKET_TYPES; i++) - update_packet_config (&remote_protocol_Z[i]); - /* Force remote_write_bytes to check whether target supports binary - downloading. */ - update_packet_config (&remote_protocol_binary_download); -} - -/* Symbol look-up. */ - -static void -remote_check_symbols (struct objfile *objfile) -{ - struct remote_state *rs = get_remote_state (); - char *msg, *reply, *tmp; - struct minimal_symbol *sym; - int end; - - if (remote_protocol_qSymbol.support == PACKET_DISABLE) - return; - - msg = alloca (rs->remote_packet_size); - reply = alloca (rs->remote_packet_size); - - /* Invite target to request symbol lookups. */ - - putpkt ("qSymbol::"); - getpkt (reply, (rs->remote_packet_size), 0); - packet_ok (reply, &remote_protocol_qSymbol); - - while (strncmp (reply, "qSymbol:", 8) == 0) - { - tmp = &reply[8]; - end = hex2bin (tmp, msg, strlen (tmp) / 2); - msg[end] = '\0'; - sym = lookup_minimal_symbol (msg, NULL, NULL); - if (sym == NULL) - sprintf (msg, "qSymbol::%s", &reply[8]); - else - sprintf (msg, "qSymbol:%s:%s", - paddr_nz (SYMBOL_VALUE_ADDRESS (sym)), - &reply[8]); - putpkt (msg); - getpkt (reply, (rs->remote_packet_size), 0); - } -} - -static void -remote_open_1 (char *name, int from_tty, struct target_ops *target, - int extended_p) -{ - struct remote_state *rs = get_remote_state (); - if (name == 0) - error ("To open a remote debug connection, you need to specify what\n" - "serial device is attached to the remote system\n" - "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."); - - /* See FIXME above */ - wait_forever_enabled_p = 1; - - target_preopen (from_tty); - - unpush_target (target); - - remote_desc = serial_open (name); - if (!remote_desc) - perror_with_name (name); - - if (baud_rate != -1) - { - if (serial_setbaudrate (remote_desc, baud_rate)) - { - serial_close (remote_desc); - perror_with_name (name); - } - } - - serial_raw (remote_desc); - - /* If there is something sitting in the buffer we might take it as a - response to a command, which would be bad. */ - serial_flush_input (remote_desc); - - if (from_tty) - { - puts_filtered ("Remote debugging using "); - puts_filtered (name); - puts_filtered ("\n"); - } - push_target (target); /* Switch to using remote target now */ - - init_all_packet_configs (); - - general_thread = -2; - continue_thread = -2; - - /* Probe for ability to use "ThreadInfo" query, as required. */ - use_threadinfo_query = 1; - use_threadextra_query = 1; - - /* Without this, some commands which require an active target (such - as kill) won't work. This variable serves (at least) double duty - as both the pid of the target process (if it has such), and as a - flag indicating that a target is active. These functions should - be split out into seperate variables, especially since GDB will - someday have a notion of debugging several processes. */ - - inferior_ptid = pid_to_ptid (MAGIC_NULL_PID); -#ifdef SOLIB_CREATE_INFERIOR_HOOK - /* First delete any symbols previously loaded from shared libraries. */ - no_shared_libraries (NULL, 0); -#endif - - /* Start the remote connection; if error (0), discard this target. - In particular, if the user quits, be sure to discard it - (we'd be in an inconsistent state otherwise). */ - if (!catch_errors (remote_start_remote, NULL, - "Couldn't establish connection to remote target\n", - RETURN_MASK_ALL)) - { - pop_target (); - return; - } - - if (extended_p) - { - /* Tell the remote that we are using the extended protocol. */ - char *buf = alloca (rs->remote_packet_size); - putpkt ("!"); - getpkt (buf, (rs->remote_packet_size), 0); - } -#ifdef SOLIB_CREATE_INFERIOR_HOOK - /* FIXME: need a master target_open vector from which all - remote_opens can be called, so that stuff like this can - go there. Failing that, the following code must be copied - to the open function for any remote target that wants to - support svr4 shared libraries. */ - - /* Set up to detect and load shared libraries. */ - if (exec_bfd) /* No use without an exec file. */ - { - SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid)); - remote_check_symbols (symfile_objfile); - } -#endif -} - -/* Just like remote_open but with asynchronous support. */ -static void -remote_async_open_1 (char *name, int from_tty, struct target_ops *target, - int extended_p) -{ - struct remote_state *rs = get_remote_state (); - if (name == 0) - error ("To open a remote debug connection, you need to specify what\n" - "serial device is attached to the remote system\n" - "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."); - - target_preopen (from_tty); - - unpush_target (target); - - remote_desc = serial_open (name); - if (!remote_desc) - perror_with_name (name); - - if (baud_rate != -1) - { - if (serial_setbaudrate (remote_desc, baud_rate)) - { - serial_close (remote_desc); - perror_with_name (name); - } - } - - serial_raw (remote_desc); - - /* If there is something sitting in the buffer we might take it as a - response to a command, which would be bad. */ - serial_flush_input (remote_desc); - - if (from_tty) - { - puts_filtered ("Remote debugging using "); - puts_filtered (name); - puts_filtered ("\n"); - } - - push_target (target); /* Switch to using remote target now */ - - init_all_packet_configs (); - - general_thread = -2; - continue_thread = -2; - - /* Probe for ability to use "ThreadInfo" query, as required. */ - use_threadinfo_query = 1; - use_threadextra_query = 1; - - /* Without this, some commands which require an active target (such - as kill) won't work. This variable serves (at least) double duty - as both the pid of the target process (if it has such), and as a - flag indicating that a target is active. These functions should - be split out into seperate variables, especially since GDB will - someday have a notion of debugging several processes. */ - inferior_ptid = pid_to_ptid (MAGIC_NULL_PID); - - /* With this target we start out by owning the terminal. */ - remote_async_terminal_ours_p = 1; - - /* FIXME: cagney/1999-09-23: During the initial connection it is - assumed that the target is already ready and able to respond to - requests. Unfortunately remote_start_remote() eventually calls - wait_for_inferior() with no timeout. wait_forever_enabled_p gets - around this. Eventually a mechanism that allows - wait_for_inferior() to expect/get timeouts will be - implemented. */ - wait_forever_enabled_p = 0; - -#ifdef SOLIB_CREATE_INFERIOR_HOOK - /* First delete any symbols previously loaded from shared libraries. */ - no_shared_libraries (NULL, 0); -#endif - - /* Start the remote connection; if error (0), discard this target. - In particular, if the user quits, be sure to discard it - (we'd be in an inconsistent state otherwise). */ - if (!catch_errors (remote_start_remote, NULL, - "Couldn't establish connection to remote target\n", - RETURN_MASK_ALL)) - { - pop_target (); - wait_forever_enabled_p = 1; - return; - } - - wait_forever_enabled_p = 1; - - if (extended_p) - { - /* Tell the remote that we are using the extended protocol. */ - char *buf = alloca (rs->remote_packet_size); - putpkt ("!"); - getpkt (buf, (rs->remote_packet_size), 0); - } -#ifdef SOLIB_CREATE_INFERIOR_HOOK - /* FIXME: need a master target_open vector from which all - remote_opens can be called, so that stuff like this can - go there. Failing that, the following code must be copied - to the open function for any remote target that wants to - support svr4 shared libraries. */ - - /* Set up to detect and load shared libraries. */ - if (exec_bfd) /* No use without an exec file. */ - { - SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid)); - remote_check_symbols (symfile_objfile); - } -#endif -} - -/* This takes a program previously attached to and detaches it. After - this is done, GDB can be used to debug some other program. We - better not have left any breakpoints in the target program or it'll - die when it hits one. */ - -static void -remote_detach (char *args, int from_tty) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - - if (args) - error ("Argument given to \"detach\" when remotely debugging."); - - /* Tell the remote target to detach. */ - strcpy (buf, "D"); - remote_send (buf, (rs->remote_packet_size)); - - target_mourn_inferior (); - if (from_tty) - puts_filtered ("Ending remote debugging.\n"); - -} - -/* Same as remote_detach, but with async support. */ -static void -remote_async_detach (char *args, int from_tty) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - - if (args) - error ("Argument given to \"detach\" when remotely debugging."); - - /* Tell the remote target to detach. */ - strcpy (buf, "D"); - remote_send (buf, (rs->remote_packet_size)); - - /* Unregister the file descriptor from the event loop. */ - if (target_is_async_p ()) - serial_async (remote_desc, NULL, 0); - - target_mourn_inferior (); - if (from_tty) - puts_filtered ("Ending remote debugging.\n"); -} - -/* Convert hex digit A to a number. */ - -static int -fromhex (int a) -{ - if (a >= '0' && a <= '9') - return a - '0'; - else if (a >= 'a' && a <= 'f') - return a - 'a' + 10; - else if (a >= 'A' && a <= 'F') - return a - 'A' + 10; - else - error ("Reply contains invalid hex digit %d", a); -} - -static int -hex2bin (const char *hex, char *bin, int count) -{ - int i; - - for (i = 0; i < count; i++) - { - if (hex[0] == 0 || hex[1] == 0) - { - /* Hex string is short, or of uneven length. - Return the count that has been converted so far. */ - return i; - } - *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]); - hex += 2; - } - return i; -} - -/* Convert number NIB to a hex digit. */ - -static int -tohex (int nib) -{ - if (nib < 10) - return '0' + nib; - else - return 'a' + nib - 10; -} - -static int -bin2hex (const char *bin, char *hex, int count) -{ - int i; - /* May use a length, or a nul-terminated string as input. */ - if (count == 0) - count = strlen (bin); - - for (i = 0; i < count; i++) - { - *hex++ = tohex ((*bin >> 4) & 0xf); - *hex++ = tohex (*bin++ & 0xf); - } - *hex = 0; - return i; -} - -/* Tell the remote machine to resume. */ - -static enum target_signal last_sent_signal = TARGET_SIGNAL_0; - -static int last_sent_step; - -static void -remote_resume (ptid_t ptid, int step, enum target_signal siggnal) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - int pid = PIDGET (ptid); - char *p; - - if (pid == -1) - set_thread (0, 0); /* run any thread */ - else - set_thread (pid, 0); /* run this thread */ - - last_sent_signal = siggnal; - last_sent_step = step; - - /* A hook for when we need to do something at the last moment before - resumption. */ - if (target_resume_hook) - (*target_resume_hook) (); - - - /* The s/S/c/C packets do not return status. So if the target does - not support the S or C packets, the debug agent returns an empty - string which is detected in remote_wait(). This protocol defect - is fixed in the e/E packets. */ - - if (step && step_range_end) - { - /* If the target does not support the 'E' packet, we try the 'S' - packet. Ideally we would fall back to the 'e' packet if that - too is not supported. But that would require another copy of - the code to issue the 'e' packet (and fall back to 's' if not - supported) in remote_wait(). */ - - if (siggnal != TARGET_SIGNAL_0) - { - if (remote_protocol_E.support != PACKET_DISABLE) - { - p = buf; - *p++ = 'E'; - *p++ = tohex (((int) siggnal >> 4) & 0xf); - *p++ = tohex (((int) siggnal) & 0xf); - *p++ = ','; - p += hexnumstr (p, (ULONGEST) step_range_start); - *p++ = ','; - p += hexnumstr (p, (ULONGEST) step_range_end); - *p++ = 0; - - putpkt (buf); - getpkt (buf, (rs->remote_packet_size), 0); - - if (packet_ok (buf, &remote_protocol_E) == PACKET_OK) - return; - } - } - else - { - if (remote_protocol_e.support != PACKET_DISABLE) - { - p = buf; - *p++ = 'e'; - p += hexnumstr (p, (ULONGEST) step_range_start); - *p++ = ','; - p += hexnumstr (p, (ULONGEST) step_range_end); - *p++ = 0; - - putpkt (buf); - getpkt (buf, (rs->remote_packet_size), 0); - - if (packet_ok (buf, &remote_protocol_e) == PACKET_OK) - return; - } - } - } - - if (siggnal != TARGET_SIGNAL_0) - { - buf[0] = step ? 'S' : 'C'; - buf[1] = tohex (((int) siggnal >> 4) & 0xf); - buf[2] = tohex (((int) siggnal) & 0xf); - buf[3] = '\0'; - } - else - strcpy (buf, step ? "s" : "c"); - - putpkt (buf); -} - -/* Same as remote_resume, but with async support. */ -static void -remote_async_resume (ptid_t ptid, int step, enum target_signal siggnal) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - int pid = PIDGET (ptid); - char *p; - - if (pid == -1) - set_thread (0, 0); /* run any thread */ - else - set_thread (pid, 0); /* run this thread */ - - last_sent_signal = siggnal; - last_sent_step = step; - - /* A hook for when we need to do something at the last moment before - resumption. */ - if (target_resume_hook) - (*target_resume_hook) (); - - /* The s/S/c/C packets do not return status. So if the target does - not support the S or C packets, the debug agent returns an empty - string which is detected in remote_wait(). This protocol defect - is fixed in the e/E packets. */ - - if (step && step_range_end) - { - /* If the target does not support the 'E' packet, we try the 'S' - packet. Ideally we would fall back to the 'e' packet if that - too is not supported. But that would require another copy of - the code to issue the 'e' packet (and fall back to 's' if not - supported) in remote_wait(). */ - - if (siggnal != TARGET_SIGNAL_0) - { - if (remote_protocol_E.support != PACKET_DISABLE) - { - p = buf; - *p++ = 'E'; - *p++ = tohex (((int) siggnal >> 4) & 0xf); - *p++ = tohex (((int) siggnal) & 0xf); - *p++ = ','; - p += hexnumstr (p, (ULONGEST) step_range_start); - *p++ = ','; - p += hexnumstr (p, (ULONGEST) step_range_end); - *p++ = 0; - - putpkt (buf); - getpkt (buf, (rs->remote_packet_size), 0); - - if (packet_ok (buf, &remote_protocol_E) == PACKET_OK) - goto register_event_loop; - } - } - else - { - if (remote_protocol_e.support != PACKET_DISABLE) - { - p = buf; - *p++ = 'e'; - p += hexnumstr (p, (ULONGEST) step_range_start); - *p++ = ','; - p += hexnumstr (p, (ULONGEST) step_range_end); - *p++ = 0; - - putpkt (buf); - getpkt (buf, (rs->remote_packet_size), 0); - - if (packet_ok (buf, &remote_protocol_e) == PACKET_OK) - goto register_event_loop; - } - } - } - - if (siggnal != TARGET_SIGNAL_0) - { - buf[0] = step ? 'S' : 'C'; - buf[1] = tohex (((int) siggnal >> 4) & 0xf); - buf[2] = tohex ((int) siggnal & 0xf); - buf[3] = '\0'; - } - else - strcpy (buf, step ? "s" : "c"); - - putpkt (buf); - -register_event_loop: - /* We are about to start executing the inferior, let's register it - with the event loop. NOTE: this is the one place where all the - execution commands end up. We could alternatively do this in each - of the execution commands in infcmd.c.*/ - /* FIXME: ezannoni 1999-09-28: We may need to move this out of here - into infcmd.c in order to allow inferior function calls to work - NOT asynchronously. */ - if (event_loop_p && target_can_async_p ()) - target_async (inferior_event_handler, 0); - /* Tell the world that the target is now executing. */ - /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set - this? Instead, should the client of target just assume (for - async targets) that the target is going to start executing? Is - this information already found in the continuation block? */ - if (target_is_async_p ()) - target_executing = 1; -} - - -/* Set up the signal handler for SIGINT, while the target is - executing, ovewriting the 'regular' SIGINT signal handler. */ -static void -initialize_sigint_signal_handler (void) -{ - sigint_remote_token = - create_async_signal_handler (async_remote_interrupt, NULL); - signal (SIGINT, handle_remote_sigint); -} - -/* Signal handler for SIGINT, while the target is executing. */ -static void -handle_remote_sigint (int sig) -{ - signal (sig, handle_remote_sigint_twice); - sigint_remote_twice_token = - create_async_signal_handler (async_remote_interrupt_twice, NULL); - mark_async_signal_handler_wrapper (sigint_remote_token); -} - -/* Signal handler for SIGINT, installed after SIGINT has already been - sent once. It will take effect the second time that the user sends - a ^C. */ -static void -handle_remote_sigint_twice (int sig) -{ - signal (sig, handle_sigint); - sigint_remote_twice_token = - create_async_signal_handler (inferior_event_handler_wrapper, NULL); - mark_async_signal_handler_wrapper (sigint_remote_twice_token); -} - -/* Perform the real interruption of the target execution, in response - to a ^C. */ -static void -async_remote_interrupt (gdb_client_data arg) -{ - if (remote_debug) - fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n"); - - target_stop (); -} - -/* Perform interrupt, if the first attempt did not succeed. Just give - up on the target alltogether. */ -void -async_remote_interrupt_twice (gdb_client_data arg) -{ - if (remote_debug) - fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n"); - /* Do something only if the target was not killed by the previous - cntl-C. */ - if (target_executing) - { - interrupt_query (); - signal (SIGINT, handle_remote_sigint); - } -} - -/* Reinstall the usual SIGINT handlers, after the target has - stopped. */ -static void -cleanup_sigint_signal_handler (void *dummy) -{ - signal (SIGINT, handle_sigint); - if (sigint_remote_twice_token) - delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_twice_token); - if (sigint_remote_token) - delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_token); -} - -/* Send ^C to target to halt it. Target will respond, and send us a - packet. */ -static void (*ofunc) (int); - -/* The command line interface's stop routine. This function is installed - as a signal handler for SIGINT. The first time a user requests a - stop, we call remote_stop to send a break or ^C. If there is no - response from the target (it didn't stop when the user requested it), - we ask the user if he'd like to detach from the target. */ -static void -remote_interrupt (int signo) -{ - /* If this doesn't work, try more severe steps. */ - signal (signo, remote_interrupt_twice); - - if (remote_debug) - fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n"); - - target_stop (); -} - -/* The user typed ^C twice. */ - -static void -remote_interrupt_twice (int signo) -{ - signal (signo, ofunc); - interrupt_query (); - signal (signo, remote_interrupt); -} - -/* This is the generic stop called via the target vector. When a target - interrupt is requested, either by the command line or the GUI, we - will eventually end up here. */ -static void -remote_stop (void) -{ - /* Send a break or a ^C, depending on user preference. */ - if (remote_debug) - fprintf_unfiltered (gdb_stdlog, "remote_stop called\n"); - - if (remote_break) - serial_send_break (remote_desc); - else - serial_write (remote_desc, "\003", 1); -} - -/* Ask the user what to do when an interrupt is received. */ - -static void -interrupt_query (void) -{ - target_terminal_ours (); - - if (query ("Interrupted while waiting for the program.\n\ -Give up (and stop debugging it)? ")) - { - target_mourn_inferior (); - return_to_top_level (RETURN_QUIT); - } - - target_terminal_inferior (); -} - -/* Enable/disable target terminal ownership. Most targets can use - terminal groups to control terminal ownership. Remote targets are - different in that explicit transfer of ownership to/from GDB/target - is required. */ - -static void -remote_async_terminal_inferior (void) -{ - /* FIXME: cagney/1999-09-27: Shouldn't need to test for - sync_execution here. This function should only be called when - GDB is resuming the inferior in the forground. A background - resume (``run&'') should leave GDB in control of the terminal and - consequently should not call this code. */ - if (!sync_execution) - return; - /* FIXME: cagney/1999-09-27: Closely related to the above. Make - calls target_terminal_*() idenpotent. The event-loop GDB talking - to an asynchronous target with a synchronous command calls this - function from both event-top.c and infrun.c/infcmd.c. Once GDB - stops trying to transfer the terminal to the target when it - shouldn't this guard can go away. */ - if (!remote_async_terminal_ours_p) - return; - delete_file_handler (input_fd); - remote_async_terminal_ours_p = 0; - initialize_sigint_signal_handler (); - /* NOTE: At this point we could also register our selves as the - recipient of all input. Any characters typed could then be - passed on down to the target. */ -} - -static void -remote_async_terminal_ours (void) -{ - /* See FIXME in remote_async_terminal_inferior. */ - if (!sync_execution) - return; - /* See FIXME in remote_async_terminal_inferior. */ - if (remote_async_terminal_ours_p) - return; - cleanup_sigint_signal_handler (NULL); - add_file_handler (input_fd, stdin_event_handler, 0); - remote_async_terminal_ours_p = 1; -} - -/* If nonzero, ignore the next kill. */ - -int kill_kludge; - -void -remote_console_output (char *msg) -{ - char *p; - - for (p = msg; p[0] && p[1]; p += 2) - { - char tb[2]; - char c = fromhex (p[0]) * 16 + fromhex (p[1]); - tb[0] = c; - tb[1] = 0; - fputs_unfiltered (tb, gdb_stdtarg); - } - gdb_flush (gdb_stdtarg); -} - -/* Wait until the remote machine stops, then return, - storing status in STATUS just as `wait' would. - Returns "pid", which in the case of a multi-threaded - remote OS, is the thread-id. */ - -static ptid_t -remote_wait (ptid_t ptid, struct target_waitstatus *status) -{ - struct remote_state *rs = get_remote_state (); - unsigned char *buf = alloca (rs->remote_packet_size); - int thread_num = -1; - - status->kind = TARGET_WAITKIND_EXITED; - status->value.integer = 0; - - while (1) - { - unsigned char *p; - - ofunc = signal (SIGINT, remote_interrupt); - getpkt (buf, (rs->remote_packet_size), 1); - signal (SIGINT, ofunc); - - /* This is a hook for when we need to do something (perhaps the - collection of trace data) every time the target stops. */ - if (target_wait_loop_hook) - (*target_wait_loop_hook) (); - - switch (buf[0]) - { - case 'E': /* Error of some sort */ - warning ("Remote failure reply: %s", buf); - continue; - case 'T': /* Status with PC, SP, FP, ... */ - { - int i; - char* regs = (char*) alloca (MAX_REGISTER_RAW_SIZE); - - /* Expedited reply, containing Signal, {regno, reg} repeat */ - /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where - ss = signal number - n... = register number - r... = register contents - */ - p = &buf[3]; /* after Txx */ - - while (*p) - { - unsigned char *p1; - char *p_temp; - int fieldsize; - - /* Read the ``P'' register number. */ - LONGEST pnum = strtol ((const char *) p, &p_temp, 16); - p1 = (unsigned char *) p_temp; - - if (p1 == p) /* No register number present here */ - { - p1 = (unsigned char *) strchr ((const char *) p, ':'); - if (p1 == NULL) - warning ("Malformed packet(a) (missing colon): %s\n\ -Packet: '%s'\n", - p, buf); - if (strncmp ((const char *) p, "thread", p1 - p) == 0) - { - p_temp = unpack_varlen_hex (++p1, &thread_num); - record_currthread (thread_num); - p = (unsigned char *) p_temp; - } - } - else - { - struct packet_reg *reg = packet_reg_from_pnum (rs, pnum); - p = p1; - - if (*p++ != ':') - warning ("Malformed packet(b) (missing colon): %s\n\ -Packet: '%s'\n", - p, buf); - - if (reg == NULL) - warning ("Remote sent bad register number %s: %s\n\ -Packet: '%s'\n", - phex_nz (pnum, 0), p, buf); - - fieldsize = hex2bin (p, regs, REGISTER_RAW_SIZE (reg->regnum)); - p += 2 * fieldsize; - if (fieldsize < REGISTER_RAW_SIZE (reg->regnum)) - warning ("Remote reply is too short: %s", buf); - supply_register (reg->regnum, regs); - } - - if (*p++ != ';') - { - warning ("Remote register badly formatted: %s", buf); - warning (" here: %s", p); - } - } - } - /* fall through */ - case 'S': /* Old style status, just signal only */ - status->kind = TARGET_WAITKIND_STOPPED; - status->value.sig = (enum target_signal) - (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); - - if (buf[3] == 'p') - { - /* Export Cisco kernel mode as a convenience variable - (so that it can be used in the GDB prompt if desired). */ - - if (cisco_kernel_mode == 1) - set_internalvar (lookup_internalvar ("cisco_kernel_mode"), - value_from_string ("PDEBUG-")); - cisco_kernel_mode = 0; - thread_num = strtol ((const char *) &buf[4], NULL, 16); - record_currthread (thread_num); - } - else if (buf[3] == 'k') - { - /* Export Cisco kernel mode as a convenience variable - (so that it can be used in the GDB prompt if desired). */ - - if (cisco_kernel_mode == 1) - set_internalvar (lookup_internalvar ("cisco_kernel_mode"), - value_from_string ("KDEBUG-")); - cisco_kernel_mode = 1; - } - goto got_status; - case 'N': /* Cisco special: status and offsets */ - { - bfd_vma text_addr, data_addr, bss_addr; - bfd_signed_vma text_off, data_off, bss_off; - unsigned char *p1; - - status->kind = TARGET_WAITKIND_STOPPED; - status->value.sig = (enum target_signal) - (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); - - if (symfile_objfile == NULL) - { - warning ("Relocation packet received with no symbol file. \ -Packet Dropped"); - goto got_status; - } - - /* Relocate object file. Buffer format is NAATT;DD;BB - * where AA is the signal number, TT is the new text - * address, DD * is the new data address, and BB is the - * new bss address. */ - - p = &buf[3]; - text_addr = strtoul (p, (char **) &p1, 16); - if (p1 == p || *p1 != ';') - warning ("Malformed relocation packet: Packet '%s'", buf); - p = p1 + 1; - data_addr = strtoul (p, (char **) &p1, 16); - if (p1 == p || *p1 != ';') - warning ("Malformed relocation packet: Packet '%s'", buf); - p = p1 + 1; - bss_addr = strtoul (p, (char **) &p1, 16); - if (p1 == p) - warning ("Malformed relocation packet: Packet '%s'", buf); - - if (remote_cisco_section_offsets (text_addr, data_addr, bss_addr, - &text_off, &data_off, &bss_off) - == 0) - if (text_off != 0 || data_off != 0 || bss_off != 0) - remote_cisco_objfile_relocate (text_off, data_off, bss_off); - - goto got_status; - } - case 'W': /* Target exited */ - { - /* The remote process exited. */ - status->kind = TARGET_WAITKIND_EXITED; - status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]); - goto got_status; - } - case 'X': - status->kind = TARGET_WAITKIND_SIGNALLED; - status->value.sig = (enum target_signal) - (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); - kill_kludge = 1; - - goto got_status; - case 'O': /* Console output */ - remote_console_output (buf + 1); - continue; - case '\0': - if (last_sent_signal != TARGET_SIGNAL_0) - { - /* Zero length reply means that we tried 'S' or 'C' and - the remote system doesn't support it. */ - target_terminal_ours_for_output (); - printf_filtered - ("Can't send signals to this remote system. %s not sent.\n", - target_signal_to_name (last_sent_signal)); - last_sent_signal = TARGET_SIGNAL_0; - target_terminal_inferior (); - - strcpy ((char *) buf, last_sent_step ? "s" : "c"); - putpkt ((char *) buf); - continue; - } - /* else fallthrough */ - default: - warning ("Invalid remote reply: %s", buf); - continue; - } - } -got_status: - if (thread_num != -1) - { - return pid_to_ptid (thread_num); - } - return inferior_ptid; -} - -/* Async version of remote_wait. */ -static ptid_t -remote_async_wait (ptid_t ptid, struct target_waitstatus *status) -{ - struct remote_state *rs = get_remote_state (); - unsigned char *buf = alloca (rs->remote_packet_size); - int thread_num = -1; - - status->kind = TARGET_WAITKIND_EXITED; - status->value.integer = 0; - - while (1) - { - unsigned char *p; - - if (!target_is_async_p ()) - ofunc = signal (SIGINT, remote_interrupt); - /* FIXME: cagney/1999-09-27: If we're in async mode we should - _never_ wait for ever -> test on target_is_async_p(). - However, before we do that we need to ensure that the caller - knows how to take the target into/out of async mode. */ - getpkt (buf, (rs->remote_packet_size), wait_forever_enabled_p); - if (!target_is_async_p ()) - signal (SIGINT, ofunc); - - /* This is a hook for when we need to do something (perhaps the - collection of trace data) every time the target stops. */ - if (target_wait_loop_hook) - (*target_wait_loop_hook) (); - - switch (buf[0]) - { - case 'E': /* Error of some sort */ - warning ("Remote failure reply: %s", buf); - continue; - case 'T': /* Status with PC, SP, FP, ... */ - { - int i; - char* regs = (char*) alloca (MAX_REGISTER_RAW_SIZE); - - /* Expedited reply, containing Signal, {regno, reg} repeat */ - /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where - ss = signal number - n... = register number - r... = register contents - */ - p = &buf[3]; /* after Txx */ - - while (*p) - { - unsigned char *p1; - char *p_temp; - int fieldsize; - - /* Read the register number */ - long pnum = strtol ((const char *) p, &p_temp, 16); - p1 = (unsigned char *) p_temp; - - if (p1 == p) /* No register number present here */ - { - p1 = (unsigned char *) strchr ((const char *) p, ':'); - if (p1 == NULL) - warning ("Malformed packet(a) (missing colon): %s\n\ -Packet: '%s'\n", - p, buf); - if (strncmp ((const char *) p, "thread", p1 - p) == 0) - { - p_temp = unpack_varlen_hex (++p1, &thread_num); - record_currthread (thread_num); - p = (unsigned char *) p_temp; - } - } - else - { - struct packet_reg *reg = packet_reg_from_pnum (rs, pnum); - p = p1; - if (*p++ != ':') - warning ("Malformed packet(b) (missing colon): %s\n\ -Packet: '%s'\n", - p, buf); - - if (reg == NULL) - warning ("Remote sent bad register number %ld: %s\n\ -Packet: '%s'\n", - pnum, p, buf); - - fieldsize = hex2bin (p, regs, REGISTER_RAW_SIZE (reg->regnum)); - p += 2 * fieldsize; - if (fieldsize < REGISTER_RAW_SIZE (reg->regnum)) - warning ("Remote reply is too short: %s", buf); - supply_register (reg->regnum, regs); - } - - if (*p++ != ';') - { - warning ("Remote register badly formatted: %s", buf); - warning (" here: %s", p); - } - } - } - /* fall through */ - case 'S': /* Old style status, just signal only */ - status->kind = TARGET_WAITKIND_STOPPED; - status->value.sig = (enum target_signal) - (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); - - if (buf[3] == 'p') - { - /* Export Cisco kernel mode as a convenience variable - (so that it can be used in the GDB prompt if desired). */ - - if (cisco_kernel_mode == 1) - set_internalvar (lookup_internalvar ("cisco_kernel_mode"), - value_from_string ("PDEBUG-")); - cisco_kernel_mode = 0; - thread_num = strtol ((const char *) &buf[4], NULL, 16); - record_currthread (thread_num); - } - else if (buf[3] == 'k') - { - /* Export Cisco kernel mode as a convenience variable - (so that it can be used in the GDB prompt if desired). */ - - if (cisco_kernel_mode == 1) - set_internalvar (lookup_internalvar ("cisco_kernel_mode"), - value_from_string ("KDEBUG-")); - cisco_kernel_mode = 1; - } - goto got_status; - case 'N': /* Cisco special: status and offsets */ - { - bfd_vma text_addr, data_addr, bss_addr; - bfd_signed_vma text_off, data_off, bss_off; - unsigned char *p1; - - status->kind = TARGET_WAITKIND_STOPPED; - status->value.sig = (enum target_signal) - (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); - - if (symfile_objfile == NULL) - { - warning ("Relocation packet recieved with no symbol file. \ -Packet Dropped"); - goto got_status; - } - - /* Relocate object file. Buffer format is NAATT;DD;BB - * where AA is the signal number, TT is the new text - * address, DD * is the new data address, and BB is the - * new bss address. */ - - p = &buf[3]; - text_addr = strtoul (p, (char **) &p1, 16); - if (p1 == p || *p1 != ';') - warning ("Malformed relocation packet: Packet '%s'", buf); - p = p1 + 1; - data_addr = strtoul (p, (char **) &p1, 16); - if (p1 == p || *p1 != ';') - warning ("Malformed relocation packet: Packet '%s'", buf); - p = p1 + 1; - bss_addr = strtoul (p, (char **) &p1, 16); - if (p1 == p) - warning ("Malformed relocation packet: Packet '%s'", buf); - - if (remote_cisco_section_offsets (text_addr, data_addr, bss_addr, - &text_off, &data_off, &bss_off) - == 0) - if (text_off != 0 || data_off != 0 || bss_off != 0) - remote_cisco_objfile_relocate (text_off, data_off, bss_off); - - goto got_status; - } - case 'W': /* Target exited */ - { - /* The remote process exited. */ - status->kind = TARGET_WAITKIND_EXITED; - status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]); - goto got_status; - } - case 'X': - status->kind = TARGET_WAITKIND_SIGNALLED; - status->value.sig = (enum target_signal) - (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); - kill_kludge = 1; - - goto got_status; - case 'O': /* Console output */ - remote_console_output (buf + 1); - /* Return immediately to the event loop. The event loop will - still be waiting on the inferior afterwards. */ - status->kind = TARGET_WAITKIND_IGNORE; - goto got_status; - case '\0': - if (last_sent_signal != TARGET_SIGNAL_0) - { - /* Zero length reply means that we tried 'S' or 'C' and - the remote system doesn't support it. */ - target_terminal_ours_for_output (); - printf_filtered - ("Can't send signals to this remote system. %s not sent.\n", - target_signal_to_name (last_sent_signal)); - last_sent_signal = TARGET_SIGNAL_0; - target_terminal_inferior (); - - strcpy ((char *) buf, last_sent_step ? "s" : "c"); - putpkt ((char *) buf); - continue; - } - /* else fallthrough */ - default: - warning ("Invalid remote reply: %s", buf); - continue; - } - } -got_status: - if (thread_num != -1) - { - return pid_to_ptid (thread_num); - } - return inferior_ptid; -} - -/* Number of bytes of registers this stub implements. */ - -static int register_bytes_found; - -/* Read the remote registers into the block REGS. */ -/* Currently we just read all the registers, so we don't use regnum. */ - -/* ARGSUSED */ -static void -remote_fetch_registers (int regnum) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - int i; - char *p; - char *regs = alloca (rs->sizeof_g_packet); - - set_thread (PIDGET (inferior_ptid), 1); - - if (regnum >= 0) - { - struct packet_reg *reg = packet_reg_from_regnum (rs, regnum); - gdb_assert (reg != NULL); - if (!reg->in_g_packet) - internal_error (__FILE__, __LINE__, - "Attempt to fetch a non G-packet register when this " - "remote.c does not support the p-packet."); - } - - sprintf (buf, "g"); - remote_send (buf, (rs->remote_packet_size)); - - /* Save the size of the packet sent to us by the target. Its used - as a heuristic when determining the max size of packets that the - target can safely receive. */ - if ((rs->actual_register_packet_size) == 0) - (rs->actual_register_packet_size) = strlen (buf); - - /* Unimplemented registers read as all bits zero. */ - memset (regs, 0, rs->sizeof_g_packet); - - /* We can get out of synch in various cases. If the first character - in the buffer is not a hex character, assume that has happened - and try to fetch another packet to read. */ - while ((buf[0] < '0' || buf[0] > '9') - && (buf[0] < 'a' || buf[0] > 'f') - && buf[0] != 'x') /* New: unavailable register value */ - { - if (remote_debug) - fprintf_unfiltered (gdb_stdlog, - "Bad register packet; fetching a new packet\n"); - getpkt (buf, (rs->remote_packet_size), 0); - } - - /* Reply describes registers byte by byte, each byte encoded as two - hex characters. Suck them all up, then supply them to the - register cacheing/storage mechanism. */ - - p = buf; - for (i = 0; i < rs->sizeof_g_packet; i++) - { - if (p[0] == 0) - break; - if (p[1] == 0) - { - warning ("Remote reply is of odd length: %s", buf); - /* Don't change register_bytes_found in this case, and don't - print a second warning. */ - goto supply_them; - } - if (p[0] == 'x' && p[1] == 'x') - regs[i] = 0; /* 'x' */ - else - regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); - p += 2; - } - - if (i != register_bytes_found) - { - register_bytes_found = i; - if (REGISTER_BYTES_OK_P () - && !REGISTER_BYTES_OK (i)) - warning ("Remote reply is too short: %s", buf); - } - - supply_them: - { - int i; - for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++) - { - struct packet_reg *r = &rs->regs[i]; - if (r->in_g_packet) - { - supply_register (r->regnum, regs + r->offset); - if (buf[r->offset * 2] == 'x') - set_register_cached (i, -1); - } - } - } -} - -/* Prepare to store registers. Since we may send them all (using a - 'G' request), we have to read out the ones we don't want to change - first. */ - -static void -remote_prepare_to_store (void) -{ - /* Make sure the entire registers array is valid. */ - switch (remote_protocol_P.support) - { - case PACKET_DISABLE: - case PACKET_SUPPORT_UNKNOWN: - /* NOTE: This isn't rs->sizeof_g_packet because here, we are - forcing the register cache to read its and not the target - registers. */ - read_register_bytes (0, (char *) NULL, REGISTER_BYTES); /* OK use. */ - break; - case PACKET_ENABLE: - break; - } -} - -/* Helper: Attempt to store REGNUM using the P packet. Return fail IFF - packet was not recognized. */ - -static int -store_register_using_P (int regnum) -{ - struct remote_state *rs = get_remote_state (); - struct packet_reg *reg = packet_reg_from_regnum (rs, regnum); - /* Try storing a single register. */ - char *buf = alloca (rs->remote_packet_size); - char *regp = alloca (MAX_REGISTER_RAW_SIZE); - char *p; - int i; - - sprintf (buf, "P%s=", phex_nz (reg->pnum, 0)); - p = buf + strlen (buf); - regcache_collect (reg->regnum, regp); - bin2hex (regp, p, REGISTER_RAW_SIZE (reg->regnum)); - remote_send (buf, rs->remote_packet_size); - - return buf[0] != '\0'; -} - - -/* Store register REGNUM, or all registers if REGNUM == -1, from the contents - of the register cache buffer. FIXME: ignores errors. */ - -static void -remote_store_registers (int regnum) -{ - struct remote_state *rs = get_remote_state (); - char *buf; - char *regs; - int i; - char *p; - - set_thread (PIDGET (inferior_ptid), 1); - - if (regnum >= 0) - { - switch (remote_protocol_P.support) - { - case PACKET_DISABLE: - break; - case PACKET_ENABLE: - if (store_register_using_P (regnum)) - return; - else - error ("Protocol error: P packet not recognized by stub"); - case PACKET_SUPPORT_UNKNOWN: - if (store_register_using_P (regnum)) - { - /* The stub recognized the 'P' packet. Remember this. */ - remote_protocol_P.support = PACKET_ENABLE; - return; - } - else - { - /* The stub does not support the 'P' packet. Use 'G' - instead, and don't try using 'P' in the future (it - will just waste our time). */ - remote_protocol_P.support = PACKET_DISABLE; - break; - } - } - } - - /* Extract all the registers in the regcache copying them into a - local buffer. */ - { - int i; - regs = alloca (rs->sizeof_g_packet); - memset (regs, rs->sizeof_g_packet, 0); - for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++) - { - struct packet_reg *r = &rs->regs[i]; - if (r->in_g_packet) - regcache_collect (r->regnum, regs + r->offset); - } - } - - /* Command describes registers byte by byte, - each byte encoded as two hex characters. */ - buf = alloca (rs->remote_packet_size); - p = buf; - *p++ = 'G'; - /* remote_prepare_to_store insures that register_bytes_found gets set. */ - bin2hex (regs, p, register_bytes_found); - remote_send (buf, (rs->remote_packet_size)); -} - - -/* Return the number of hex digits in num. */ - -static int -hexnumlen (ULONGEST num) -{ - int i; - - for (i = 0; num != 0; i++) - num >>= 4; - - return max (i, 1); -} - -/* Set BUF to the minimum number of hex digits representing NUM. */ - -static int -hexnumstr (char *buf, ULONGEST num) -{ - int len = hexnumlen (num); - return hexnumnstr (buf, num, len); -} - - -/* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */ - -static int -hexnumnstr (char *buf, ULONGEST num, int width) -{ - int i; - - buf[width] = '\0'; - - for (i = width - 1; i >= 0; i--) - { - buf[i] = "0123456789abcdef"[(num & 0xf)]; - num >>= 4; - } - - return width; -} - -/* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */ - -static CORE_ADDR -remote_address_masked (CORE_ADDR addr) -{ - if (remote_address_size > 0 - && remote_address_size < (sizeof (ULONGEST) * 8)) - { - /* Only create a mask when that mask can safely be constructed - in a ULONGEST variable. */ - ULONGEST mask = 1; - mask = (mask << remote_address_size) - 1; - addr &= mask; - } - return addr; -} - -/* Determine whether the remote target supports binary downloading. - This is accomplished by sending a no-op memory write of zero length - to the target at the specified address. It does not suffice to send - the whole packet, since many stubs strip the eighth bit and subsequently - compute a wrong checksum, which causes real havoc with remote_write_bytes. - - NOTE: This can still lose if the serial line is not eight-bit - clean. In cases like this, the user should clear "remote - X-packet". */ - -static void -check_binary_download (CORE_ADDR addr) -{ - struct remote_state *rs = get_remote_state (); - switch (remote_protocol_binary_download.support) - { - case PACKET_DISABLE: - break; - case PACKET_ENABLE: - break; - case PACKET_SUPPORT_UNKNOWN: - { - char *buf = alloca (rs->remote_packet_size); - char *p; - - p = buf; - *p++ = 'X'; - p += hexnumstr (p, (ULONGEST) addr); - *p++ = ','; - p += hexnumstr (p, (ULONGEST) 0); - *p++ = ':'; - *p = '\0'; - - putpkt_binary (buf, (int) (p - buf)); - getpkt (buf, (rs->remote_packet_size), 0); - - if (buf[0] == '\0') - { - if (remote_debug) - fprintf_unfiltered (gdb_stdlog, - "binary downloading NOT suppported by target\n"); - remote_protocol_binary_download.support = PACKET_DISABLE; - } - else - { - if (remote_debug) - fprintf_unfiltered (gdb_stdlog, - "binary downloading suppported by target\n"); - remote_protocol_binary_download.support = PACKET_ENABLE; - } - break; - } - } -} - -/* Write memory data directly to the remote machine. - This does not inform the data cache; the data cache uses this. - MEMADDR is the address in the remote memory space. - MYADDR is the address of the buffer in our space. - LEN is the number of bytes. - - Returns number of bytes transferred, or 0 (setting errno) for - error. Only transfer a single packet. */ - -static int -remote_write_bytes (CORE_ADDR memaddr, char *myaddr, int len) -{ - unsigned char *buf; - int max_buf_size; /* Max size of packet output buffer */ - unsigned char *p; - unsigned char *plen; - long sizeof_buf; - int plenlen; - int todo; - int nr_bytes; - - /* Verify that the target can support a binary download */ - check_binary_download (memaddr); - - /* Determine the max packet size. */ - max_buf_size = get_memory_write_packet_size (); - sizeof_buf = max_buf_size + 1; /* Space for trailing NUL */ - buf = alloca (sizeof_buf); - - /* Subtract header overhead from max payload size - $M<memaddr>,<len>:#nn */ - max_buf_size -= 2 + hexnumlen (memaddr + len - 1) + 1 + hexnumlen (len) + 4; - - /* construct "M"<memaddr>","<len>":" */ - /* sprintf (buf, "M%lx,%x:", (unsigned long) memaddr, todo); */ - p = buf; - - /* Append [XM]. Compute a best guess of the number of bytes - actually transfered. */ - switch (remote_protocol_binary_download.support) - { - case PACKET_ENABLE: - *p++ = 'X'; - /* Best guess at number of bytes that will fit. */ - todo = min (len, max_buf_size); - break; - case PACKET_DISABLE: - *p++ = 'M'; - /* num bytes that will fit */ - todo = min (len, max_buf_size / 2); - break; - case PACKET_SUPPORT_UNKNOWN: - internal_error (__FILE__, __LINE__, - "remote_write_bytes: bad internal state"); - default: - internal_error (__FILE__, __LINE__, "bad switch"); - } - - /* Append <memaddr> */ - memaddr = remote_address_masked (memaddr); - p += hexnumstr (p, (ULONGEST) memaddr); - *p++ = ','; - - /* Append <len>. Retain the location/size of <len>. It may - need to be adjusted once the packet body has been created. */ - plen = p; - plenlen = hexnumstr (p, (ULONGEST) todo); - p += plenlen; - *p++ = ':'; - *p = '\0'; - - /* Append the packet body. */ - switch (remote_protocol_binary_download.support) - { - case PACKET_ENABLE: - /* Binary mode. Send target system values byte by byte, in - increasing byte addresses. Only escape certain critical - characters. */ - for (nr_bytes = 0; - (nr_bytes < todo) && (p - buf) < (max_buf_size - 2); - nr_bytes++) - { - switch (myaddr[nr_bytes] & 0xff) - { - case '$': - case '#': - case 0x7d: - /* These must be escaped */ - *p++ = 0x7d; - *p++ = (myaddr[nr_bytes] & 0xff) ^ 0x20; - break; - default: - *p++ = myaddr[nr_bytes] & 0xff; - break; - } - } - if (nr_bytes < todo) - { - /* Escape chars have filled up the buffer prematurely, - and we have actually sent fewer bytes than planned. - Fix-up the length field of the packet. Use the same - number of characters as before. */ - - plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen); - *plen = ':'; /* overwrite \0 from hexnumnstr() */ - } - break; - case PACKET_DISABLE: - /* Normal mode: Send target system values byte by byte, in - increasing byte addresses. Each byte is encoded as a two hex - value. */ - nr_bytes = bin2hex (myaddr, p, todo); - p += 2 * nr_bytes; - break; - case PACKET_SUPPORT_UNKNOWN: - internal_error (__FILE__, __LINE__, - "remote_write_bytes: bad internal state"); - default: - internal_error (__FILE__, __LINE__, "bad switch"); - } - - putpkt_binary (buf, (int) (p - buf)); - getpkt (buf, sizeof_buf, 0); - - if (buf[0] == 'E') - { - /* There is no correspondance between what the remote protocol - uses for errors and errno codes. We would like a cleaner way - of representing errors (big enough to include errno codes, - bfd_error codes, and others). But for now just return EIO. */ - errno = EIO; - return 0; - } - - /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer - bytes than we'd planned. */ - return nr_bytes; -} - -/* Read memory data directly from the remote machine. - This does not use the data cache; the data cache uses this. - MEMADDR is the address in the remote memory space. - MYADDR is the address of the buffer in our space. - LEN is the number of bytes. - - Returns number of bytes transferred, or 0 for error. */ - -/* NOTE: cagney/1999-10-18: This function (and its siblings in other - remote targets) shouldn't attempt to read the entire buffer. - Instead it should read a single packet worth of data and then - return the byte size of that packet to the caller. The caller (its - caller and its callers caller ;-) already contains code for - handling partial reads. */ - -static int -remote_read_bytes (CORE_ADDR memaddr, char *myaddr, int len) -{ - char *buf; - int max_buf_size; /* Max size of packet output buffer */ - long sizeof_buf; - int origlen; - - /* Create a buffer big enough for this packet. */ - max_buf_size = get_memory_read_packet_size (); - sizeof_buf = max_buf_size + 1; /* Space for trailing NUL */ - buf = alloca (sizeof_buf); - - origlen = len; - while (len > 0) - { - char *p; - int todo; - int i; - - todo = min (len, max_buf_size / 2); /* num bytes that will fit */ - - /* construct "m"<memaddr>","<len>" */ - /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */ - memaddr = remote_address_masked (memaddr); - p = buf; - *p++ = 'm'; - p += hexnumstr (p, (ULONGEST) memaddr); - *p++ = ','; - p += hexnumstr (p, (ULONGEST) todo); - *p = '\0'; - - putpkt (buf); - getpkt (buf, sizeof_buf, 0); - - if (buf[0] == 'E') - { - /* There is no correspondance between what the remote protocol uses - for errors and errno codes. We would like a cleaner way of - representing errors (big enough to include errno codes, bfd_error - codes, and others). But for now just return EIO. */ - errno = EIO; - return 0; - } - - /* Reply describes memory byte by byte, - each byte encoded as two hex characters. */ - - p = buf; - if ((i = hex2bin (p, myaddr, todo)) < todo) - { - /* Reply is short. This means that we were able to read - only part of what we wanted to. */ - return i + (origlen - len); - } - myaddr += todo; - memaddr += todo; - len -= todo; - } - return origlen; -} - -/* Read or write LEN bytes from inferior memory at MEMADDR, - transferring to or from debugger address BUFFER. Write to inferior if - SHOULD_WRITE is nonzero. Returns length of data written or read; 0 - for error. TARGET is unused. */ - -/* ARGSUSED */ -static int -remote_xfer_memory (CORE_ADDR mem_addr, char *buffer, int mem_len, - int should_write, struct mem_attrib *attrib, - struct target_ops *target) -{ - CORE_ADDR targ_addr; - int targ_len; - int res; - - REMOTE_TRANSLATE_XFER_ADDRESS (mem_addr, mem_len, &targ_addr, &targ_len); - if (targ_len <= 0) - return 0; - - if (should_write) - res = remote_write_bytes (targ_addr, buffer, targ_len); - else - res = remote_read_bytes (targ_addr, buffer, targ_len); - - return res; -} - - -#if 0 -/* Enable after 4.12. */ - -void -remote_search (int len, char *data, char *mask, CORE_ADDR startaddr, - int increment, CORE_ADDR lorange, CORE_ADDR hirange, - CORE_ADDR *addr_found, char *data_found) -{ - if (increment == -4 && len == 4) - { - long mask_long, data_long; - long data_found_long; - CORE_ADDR addr_we_found; - char *buf = alloca (rs->remote_packet_size); - long returned_long[2]; - char *p; - - mask_long = extract_unsigned_integer (mask, len); - data_long = extract_unsigned_integer (data, len); - sprintf (buf, "t%x:%x,%x", startaddr, data_long, mask_long); - putpkt (buf); - getpkt (buf, (rs->remote_packet_size), 0); - if (buf[0] == '\0') - { - /* The stub doesn't support the 't' request. We might want to - remember this fact, but on the other hand the stub could be - switched on us. Maybe we should remember it only until - the next "target remote". */ - generic_search (len, data, mask, startaddr, increment, lorange, - hirange, addr_found, data_found); - return; - } - - if (buf[0] == 'E') - /* There is no correspondance between what the remote protocol uses - for errors and errno codes. We would like a cleaner way of - representing errors (big enough to include errno codes, bfd_error - codes, and others). But for now just use EIO. */ - memory_error (EIO, startaddr); - p = buf; - addr_we_found = 0; - while (*p != '\0' && *p != ',') - addr_we_found = (addr_we_found << 4) + fromhex (*p++); - if (*p == '\0') - error ("Protocol error: short return for search"); - - data_found_long = 0; - while (*p != '\0' && *p != ',') - data_found_long = (data_found_long << 4) + fromhex (*p++); - /* Ignore anything after this comma, for future extensions. */ - - if (addr_we_found < lorange || addr_we_found >= hirange) - { - *addr_found = 0; - return; - } - - *addr_found = addr_we_found; - *data_found = store_unsigned_integer (data_we_found, len); - return; - } - generic_search (len, data, mask, startaddr, increment, lorange, - hirange, addr_found, data_found); -} -#endif /* 0 */ - -static void -remote_files_info (struct target_ops *ignore) -{ - puts_filtered ("Debugging a target over a serial line.\n"); -} - -/* Stuff for dealing with the packets which are part of this protocol. - See comment at top of file for details. */ - -/* Read a single character from the remote end, masking it down to 7 bits. */ - -static int -readchar (int timeout) -{ - int ch; - - ch = serial_readchar (remote_desc, timeout); - - if (ch >= 0) - return (ch & 0x7f); - - switch ((enum serial_rc) ch) - { - case SERIAL_EOF: - target_mourn_inferior (); - error ("Remote connection closed"); - /* no return */ - case SERIAL_ERROR: - perror_with_name ("Remote communication error"); - /* no return */ - case SERIAL_TIMEOUT: - break; - } - return ch; -} - -/* Send the command in BUF to the remote machine, and read the reply - into BUF. Report an error if we get an error reply. */ - -static void -remote_send (char *buf, - long sizeof_buf) -{ - putpkt (buf); - getpkt (buf, sizeof_buf, 0); - - if (buf[0] == 'E') - error ("Remote failure reply: %s", buf); -} - -/* Display a null-terminated packet on stdout, for debugging, using C - string notation. */ - -static void -print_packet (char *buf) -{ - puts_filtered ("\""); - fputstr_filtered (buf, '"', gdb_stdout); - puts_filtered ("\""); -} - -int -putpkt (char *buf) -{ - return putpkt_binary (buf, strlen (buf)); -} - -/* Send a packet to the remote machine, with error checking. The data - of the packet is in BUF. The string in BUF can be at most (rs->remote_packet_size) - 5 - to account for the $, # and checksum, and for a possible /0 if we are - debugging (remote_debug) and want to print the sent packet as a string */ - -static int -putpkt_binary (char *buf, int cnt) -{ - struct remote_state *rs = get_remote_state (); - int i; - unsigned char csum = 0; - char *buf2 = alloca (cnt + 6); - long sizeof_junkbuf = (rs->remote_packet_size); - char *junkbuf = alloca (sizeof_junkbuf); - - int ch; - int tcount = 0; - char *p; - - /* Copy the packet into buffer BUF2, encapsulating it - and giving it a checksum. */ - - p = buf2; - *p++ = '$'; - - for (i = 0; i < cnt; i++) - { - csum += buf[i]; - *p++ = buf[i]; - } - *p++ = '#'; - *p++ = tohex ((csum >> 4) & 0xf); - *p++ = tohex (csum & 0xf); - - /* Send it over and over until we get a positive ack. */ - - while (1) - { - int started_error_output = 0; - - if (remote_debug) - { - *p = '\0'; - fprintf_unfiltered (gdb_stdlog, "Sending packet: "); - fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog); - fprintf_unfiltered (gdb_stdlog, "..."); - gdb_flush (gdb_stdlog); - } - if (serial_write (remote_desc, buf2, p - buf2)) - perror_with_name ("putpkt: write failed"); - - /* read until either a timeout occurs (-2) or '+' is read */ - while (1) - { - ch = readchar (remote_timeout); - - if (remote_debug) - { - switch (ch) - { - case '+': - case '-': - case SERIAL_TIMEOUT: - case '$': - if (started_error_output) - { - putchar_unfiltered ('\n'); - started_error_output = 0; - } - } - } - - switch (ch) - { - case '+': - if (remote_debug) - fprintf_unfiltered (gdb_stdlog, "Ack\n"); - return 1; - case '-': - if (remote_debug) - fprintf_unfiltered (gdb_stdlog, "Nak\n"); - case SERIAL_TIMEOUT: - tcount++; - if (tcount > 3) - return 0; - break; /* Retransmit buffer */ - case '$': - { - if (remote_debug) - fprintf_unfiltered (gdb_stdlog, "Packet instead of Ack, ignoring it\n"); - /* It's probably an old response, and we're out of sync. - Just gobble up the packet and ignore it. */ - read_frame (junkbuf, sizeof_junkbuf); - continue; /* Now, go look for + */ - } - default: - if (remote_debug) - { - if (!started_error_output) - { - started_error_output = 1; - fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: "); - } - fputc_unfiltered (ch & 0177, gdb_stdlog); - } - continue; - } - break; /* Here to retransmit */ - } - -#if 0 - /* This is wrong. If doing a long backtrace, the user should be - able to get out next time we call QUIT, without anything as - violent as interrupt_query. If we want to provide a way out of - here without getting to the next QUIT, it should be based on - hitting ^C twice as in remote_wait. */ - if (quit_flag) - { - quit_flag = 0; - interrupt_query (); - } -#endif - } -} - -static int remote_cisco_mode; - -/* Come here after finding the start of the frame. Collect the rest - into BUF, verifying the checksum, length, and handling run-length - compression. No more than sizeof_buf-1 characters are read so that - the buffer can be NUL terminated. - - Returns -1 on error, number of characters in buffer (ignoring the - trailing NULL) on success. (could be extended to return one of the - SERIAL status indications). */ - -static long -read_frame (char *buf, - long sizeof_buf) -{ - unsigned char csum; - long bc; - int c; - - csum = 0; - bc = 0; - - while (1) - { - /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */ - c = readchar (remote_timeout); - switch (c) - { - case SERIAL_TIMEOUT: - if (remote_debug) - fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog); - return -1; - case '$': - if (remote_debug) - fputs_filtered ("Saw new packet start in middle of old one\n", - gdb_stdlog); - return -1; /* Start a new packet, count retries */ - case '#': - { - unsigned char pktcsum; - int check_0 = 0; - int check_1 = 0; - - buf[bc] = '\0'; - - check_0 = readchar (remote_timeout); - if (check_0 >= 0) - check_1 = readchar (remote_timeout); - - if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT) - { - if (remote_debug) - fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog); - return -1; - } - else if (check_0 < 0 || check_1 < 0) - { - if (remote_debug) - fputs_filtered ("Communication error in checksum\n", gdb_stdlog); - return -1; - } - - pktcsum = (fromhex (check_0) << 4) | fromhex (check_1); - if (csum == pktcsum) - return bc; - - if (remote_debug) - { - fprintf_filtered (gdb_stdlog, - "Bad checksum, sentsum=0x%x, csum=0x%x, buf=", - pktcsum, csum); - fputs_filtered (buf, gdb_stdlog); - fputs_filtered ("\n", gdb_stdlog); - } - /* Number of characters in buffer ignoring trailing - NUL. */ - return -1; - } - case '*': /* Run length encoding */ - { - int repeat; - csum += c; - - if (remote_cisco_mode == 0) - { - c = readchar (remote_timeout); - csum += c; - repeat = c - ' ' + 3; /* Compute repeat count */ - } - else - { - /* Cisco's run-length encoding variant uses two - hex chars to represent the repeat count. */ - - c = readchar (remote_timeout); - csum += c; - repeat = fromhex (c) << 4; - c = readchar (remote_timeout); - csum += c; - repeat += fromhex (c); - } - - /* The character before ``*'' is repeated. */ - - if (repeat > 0 && repeat <= 255 - && bc > 0 - && bc + repeat - 1 < sizeof_buf - 1) - { - memset (&buf[bc], buf[bc - 1], repeat); - bc += repeat; - continue; - } - - buf[bc] = '\0'; - printf_filtered ("Repeat count %d too large for buffer: ", repeat); - puts_filtered (buf); - puts_filtered ("\n"); - return -1; - } - default: - if (bc < sizeof_buf - 1) - { - buf[bc++] = c; - csum += c; - continue; - } - - buf[bc] = '\0'; - puts_filtered ("Remote packet too long: "); - puts_filtered (buf); - puts_filtered ("\n"); - - return -1; - } - } -} - -/* Read a packet from the remote machine, with error checking, and - store it in BUF. If FOREVER, wait forever rather than timing out; - this is used (in synchronous mode) to wait for a target that is is - executing user code to stop. */ -/* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we - don't have to change all the calls to getpkt to deal with the - return value, because at the moment I don't know what the right - thing to do it for those. */ -void -getpkt (char *buf, - long sizeof_buf, - int forever) -{ - int timed_out; - - timed_out = getpkt_sane (buf, sizeof_buf, forever); -} - - -/* Read a packet from the remote machine, with error checking, and - store it in BUF. If FOREVER, wait forever rather than timing out; - this is used (in synchronous mode) to wait for a target that is is - executing user code to stop. If FOREVER == 0, this function is - allowed to time out gracefully and return an indication of this to - the caller. */ -static int -getpkt_sane (char *buf, - long sizeof_buf, - int forever) -{ - int c; - int tries; - int timeout; - int val; - - strcpy (buf, "timeout"); - - if (forever) - { - timeout = watchdog > 0 ? watchdog : -1; - } - - else - timeout = remote_timeout; - -#define MAX_TRIES 3 - - for (tries = 1; tries <= MAX_TRIES; tries++) - { - /* This can loop forever if the remote side sends us characters - continuously, but if it pauses, we'll get a zero from readchar - because of timeout. Then we'll count that as a retry. */ - - /* Note that we will only wait forever prior to the start of a packet. - After that, we expect characters to arrive at a brisk pace. They - should show up within remote_timeout intervals. */ - - do - { - c = readchar (timeout); - - if (c == SERIAL_TIMEOUT) - { - if (forever) /* Watchdog went off? Kill the target. */ - { - QUIT; - target_mourn_inferior (); - error ("Watchdog has expired. Target detached.\n"); - } - if (remote_debug) - fputs_filtered ("Timed out.\n", gdb_stdlog); - goto retry; - } - } - while (c != '$'); - - /* We've found the start of a packet, now collect the data. */ - - val = read_frame (buf, sizeof_buf); - - if (val >= 0) - { - if (remote_debug) - { - fprintf_unfiltered (gdb_stdlog, "Packet received: "); - fputstr_unfiltered (buf, 0, gdb_stdlog); - fprintf_unfiltered (gdb_stdlog, "\n"); - } - serial_write (remote_desc, "+", 1); - return 0; - } - - /* Try the whole thing again. */ - retry: - serial_write (remote_desc, "-", 1); - } - - /* We have tried hard enough, and just can't receive the packet. Give up. */ - - printf_unfiltered ("Ignoring packet error, continuing...\n"); - serial_write (remote_desc, "+", 1); - return 1; -} - -static void -remote_kill (void) -{ - /* For some mysterious reason, wait_for_inferior calls kill instead of - mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */ - if (kill_kludge) - { - kill_kludge = 0; - target_mourn_inferior (); - return; - } - - /* Use catch_errors so the user can quit from gdb even when we aren't on - speaking terms with the remote system. */ - catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR); - - /* Don't wait for it to die. I'm not really sure it matters whether - we do or not. For the existing stubs, kill is a noop. */ - target_mourn_inferior (); -} - -/* Async version of remote_kill. */ -static void -remote_async_kill (void) -{ - /* Unregister the file descriptor from the event loop. */ - if (target_is_async_p ()) - serial_async (remote_desc, NULL, 0); - - /* For some mysterious reason, wait_for_inferior calls kill instead of - mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */ - if (kill_kludge) - { - kill_kludge = 0; - target_mourn_inferior (); - return; - } - - /* Use catch_errors so the user can quit from gdb even when we aren't on - speaking terms with the remote system. */ - catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR); - - /* Don't wait for it to die. I'm not really sure it matters whether - we do or not. For the existing stubs, kill is a noop. */ - target_mourn_inferior (); -} - -static void -remote_mourn (void) -{ - remote_mourn_1 (&remote_ops); -} - -static void -remote_async_mourn (void) -{ - remote_mourn_1 (&remote_async_ops); -} - -static void -extended_remote_mourn (void) -{ - /* We do _not_ want to mourn the target like this; this will - remove the extended remote target from the target stack, - and the next time the user says "run" it'll fail. - - FIXME: What is the right thing to do here? */ -#if 0 - remote_mourn_1 (&extended_remote_ops); -#endif -} - -/* Worker function for remote_mourn. */ -static void -remote_mourn_1 (struct target_ops *target) -{ - unpush_target (target); - generic_mourn_inferior (); -} - -/* In the extended protocol we want to be able to do things like - "run" and have them basically work as expected. So we need - a special create_inferior function. - - FIXME: One day add support for changing the exec file - we're debugging, arguments and an environment. */ - -static void -extended_remote_create_inferior (char *exec_file, char *args, char **env) -{ - /* Rip out the breakpoints; we'll reinsert them after restarting - the remote server. */ - remove_breakpoints (); - - /* Now restart the remote server. */ - extended_remote_restart (); - - /* Now put the breakpoints back in. This way we're safe if the - restart function works via a unix fork on the remote side. */ - insert_breakpoints (); - - /* Clean up from the last time we were running. */ - clear_proceed_status (); - - /* Let the remote process run. */ - proceed (-1, TARGET_SIGNAL_0, 0); -} - -/* Async version of extended_remote_create_inferior. */ -static void -extended_remote_async_create_inferior (char *exec_file, char *args, char **env) -{ - /* Rip out the breakpoints; we'll reinsert them after restarting - the remote server. */ - remove_breakpoints (); - - /* If running asynchronously, register the target file descriptor - with the event loop. */ - if (event_loop_p && target_can_async_p ()) - target_async (inferior_event_handler, 0); - - /* Now restart the remote server. */ - extended_remote_restart (); - - /* Now put the breakpoints back in. This way we're safe if the - restart function works via a unix fork on the remote side. */ - insert_breakpoints (); - - /* Clean up from the last time we were running. */ - clear_proceed_status (); - - /* Let the remote process run. */ - proceed (-1, TARGET_SIGNAL_0, 0); -} - - -/* On some machines, e.g. 68k, we may use a different breakpoint instruction - than other targets; in those use REMOTE_BREAKPOINT instead of just - BREAKPOINT. Also, bi-endian targets may define LITTLE_REMOTE_BREAKPOINT - and BIG_REMOTE_BREAKPOINT. If none of these are defined, we just call - the standard routines that are in mem-break.c. */ - -/* FIXME, these ought to be done in a more dynamic fashion. For instance, - the choice of breakpoint instruction affects target program design and - vice versa, and by making it user-tweakable, the special code here - goes away and we need fewer special GDB configurations. */ - -#if defined (LITTLE_REMOTE_BREAKPOINT) && defined (BIG_REMOTE_BREAKPOINT) && !defined(REMOTE_BREAKPOINT) -#define REMOTE_BREAKPOINT -#endif - -#ifdef REMOTE_BREAKPOINT - -/* If the target isn't bi-endian, just pretend it is. */ -#if !defined (LITTLE_REMOTE_BREAKPOINT) && !defined (BIG_REMOTE_BREAKPOINT) -#define LITTLE_REMOTE_BREAKPOINT REMOTE_BREAKPOINT -#define BIG_REMOTE_BREAKPOINT REMOTE_BREAKPOINT -#endif - -static unsigned char big_break_insn[] = BIG_REMOTE_BREAKPOINT; -static unsigned char little_break_insn[] = LITTLE_REMOTE_BREAKPOINT; - -#endif /* REMOTE_BREAKPOINT */ - -/* Insert a breakpoint on targets that don't have any better breakpoint - support. We read the contents of the target location and stash it, - then overwrite it with a breakpoint instruction. ADDR is the target - location in the target machine. CONTENTS_CACHE is a pointer to - memory allocated for saving the target contents. It is guaranteed - by the caller to be long enough to save sizeof BREAKPOINT bytes (this - is accomplished via BREAKPOINT_MAX). */ - -static int -remote_insert_breakpoint (CORE_ADDR addr, char *contents_cache) -{ - struct remote_state *rs = get_remote_state (); -#ifdef REMOTE_BREAKPOINT - int val; -#endif - int bp_size; - - /* Try the "Z" s/w breakpoint packet if it is not already disabled. - If it succeeds, then set the support to PACKET_ENABLE. If it - fails, and the user has explicitly requested the Z support then - report an error, otherwise, mark it disabled and go on. */ - - if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE) - { - char *buf = alloca (rs->remote_packet_size); - char *p = buf; - - addr = remote_address_masked (addr); - *(p++) = 'Z'; - *(p++) = '0'; - *(p++) = ','; - p += hexnumstr (p, (ULONGEST) addr); - BREAKPOINT_FROM_PC (&addr, &bp_size); - sprintf (p, ",%d", bp_size); - - putpkt (buf); - getpkt (buf, (rs->remote_packet_size), 0); - - switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_SOFTWARE_BP])) - { - case PACKET_ERROR: - return -1; - case PACKET_OK: - return 0; - case PACKET_UNKNOWN: - break; - } - } - -#ifdef REMOTE_BREAKPOINT - val = target_read_memory (addr, contents_cache, sizeof big_break_insn); - - if (val == 0) - { - if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) - val = target_write_memory (addr, (char *) big_break_insn, - sizeof big_break_insn); - else - val = target_write_memory (addr, (char *) little_break_insn, - sizeof little_break_insn); - } - - return val; -#else - return memory_insert_breakpoint (addr, contents_cache); -#endif /* REMOTE_BREAKPOINT */ -} - -static int -remote_remove_breakpoint (CORE_ADDR addr, char *contents_cache) -{ - struct remote_state *rs = get_remote_state (); - int bp_size; - - if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE) - { - char *buf = alloca (rs->remote_packet_size); - char *p = buf; - - *(p++) = 'z'; - *(p++) = '0'; - *(p++) = ','; - - addr = remote_address_masked (addr); - p += hexnumstr (p, (ULONGEST) addr); - BREAKPOINT_FROM_PC (&addr, &bp_size); - sprintf (p, ",%d", bp_size); - - putpkt (buf); - getpkt (buf, (rs->remote_packet_size), 0); - - return (buf[0] == 'E'); - } - -#ifdef REMOTE_BREAKPOINT - return target_write_memory (addr, contents_cache, sizeof big_break_insn); -#else - return memory_remove_breakpoint (addr, contents_cache); -#endif /* REMOTE_BREAKPOINT */ -} - -static int -watchpoint_to_Z_packet (int type) -{ - switch (type) - { - case hw_write: - return 2; - break; - case hw_read: - return 3; - break; - case hw_access: - return 4; - break; - default: - internal_error (__FILE__, __LINE__, - "hw_bp_to_z: bad watchpoint type %d", type); - } -} - -/* FIXME: This function should be static and a member of the remote - target vector. */ - -int -remote_insert_watchpoint (CORE_ADDR addr, int len, int type) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - char *p; - enum Z_packet_type packet = watchpoint_to_Z_packet (type); - - if (remote_protocol_Z[packet].support == PACKET_DISABLE) - error ("Can't set hardware watchpoints without the '%s' (%s) packet\n", - remote_protocol_Z[packet].name, - remote_protocol_Z[packet].title); - - sprintf (buf, "Z%x,", packet); - p = strchr (buf, '\0'); - addr = remote_address_masked (addr); - p += hexnumstr (p, (ULONGEST) addr); - sprintf (p, ",%x", len); - - putpkt (buf); - getpkt (buf, (rs->remote_packet_size), 0); - - switch (packet_ok (buf, &remote_protocol_Z[packet])) - { - case PACKET_ERROR: - case PACKET_UNKNOWN: - return -1; - case PACKET_OK: - return 0; - } - internal_error (__FILE__, __LINE__, - "remote_insert_watchpoint: reached end of function"); -} - -/* FIXME: This function should be static and a member of the remote - target vector. */ - -int -remote_remove_watchpoint (CORE_ADDR addr, int len, int type) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - char *p; - enum Z_packet_type packet = watchpoint_to_Z_packet (type); - - if (remote_protocol_Z[packet].support == PACKET_DISABLE) - error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n", - remote_protocol_Z[packet].name, - remote_protocol_Z[packet].title); - - sprintf (buf, "z%x,", packet); - p = strchr (buf, '\0'); - addr = remote_address_masked (addr); - p += hexnumstr (p, (ULONGEST) addr); - sprintf (p, ",%x", len); - putpkt (buf); - getpkt (buf, (rs->remote_packet_size), 0); - - switch (packet_ok (buf, &remote_protocol_Z[packet])) - { - case PACKET_ERROR: - case PACKET_UNKNOWN: - return -1; - case PACKET_OK: - return 0; - } - internal_error (__FILE__, __LINE__, - "remote_remove_watchpoint: reached end of function"); -} - -/* FIXME: This function should be static and a member of the remote - target vector. */ - -int -remote_insert_hw_breakpoint (CORE_ADDR addr, int len) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - char *p = buf; - - if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE) - error ("Can't set hardware breakpoint without the '%s' (%s) packet\n", - remote_protocol_Z[Z_PACKET_HARDWARE_BP].name, - remote_protocol_Z[Z_PACKET_HARDWARE_BP].title); - - *(p++) = 'Z'; - *(p++) = '1'; - *(p++) = ','; - - addr = remote_address_masked (addr); - p += hexnumstr (p, (ULONGEST) addr); - sprintf (p, ",%x", len); - - putpkt (buf); - getpkt (buf, (rs->remote_packet_size), 0); - - switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP])) - { - case PACKET_ERROR: - case PACKET_UNKNOWN: - return -1; - case PACKET_OK: - return 0; - } - internal_error (__FILE__, __LINE__, - "remote_remove_watchpoint: reached end of function"); -} - -/* FIXME: This function should be static and a member of the remote - target vector. */ - -int -remote_remove_hw_breakpoint (CORE_ADDR addr, int len) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - char *p = buf; - - if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE) - error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n", - remote_protocol_Z[Z_PACKET_HARDWARE_BP].name, - remote_protocol_Z[Z_PACKET_HARDWARE_BP].title); - - *(p++) = 'z'; - *(p++) = '1'; - *(p++) = ','; - - addr = remote_address_masked (addr); - p += hexnumstr (p, (ULONGEST) addr); - sprintf (p, ",%x", len); - - putpkt(buf); - getpkt (buf, (rs->remote_packet_size), 0); - - switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP])) - { - case PACKET_ERROR: - case PACKET_UNKNOWN: - return -1; - case PACKET_OK: - return 0; - } - internal_error (__FILE__, __LINE__, - "remote_remove_watchpoint: reached end of function"); -} - -/* Some targets are only capable of doing downloads, and afterwards - they switch to the remote serial protocol. This function provides - a clean way to get from the download target to the remote target. - It's basically just a wrapper so that we don't have to expose any - of the internal workings of remote.c. - - Prior to calling this routine, you should shutdown the current - target code, else you will get the "A program is being debugged - already..." message. Usually a call to pop_target() suffices. */ - -void -push_remote_target (char *name, int from_tty) -{ - printf_filtered ("Switching to remote protocol\n"); - remote_open (name, from_tty); -} - -/* Other targets want to use the entire remote serial module but with - certain remote_ops overridden. */ - -void -open_remote_target (char *name, int from_tty, struct target_ops *target, - int extended_p) -{ - printf_filtered ("Selecting the %sremote protocol\n", - (extended_p ? "extended-" : "")); - remote_open_1 (name, from_tty, target, extended_p); -} - -/* Table used by the crc32 function to calcuate the checksum. */ - -static unsigned long crc32_table[256] = -{0, 0}; - -static unsigned long -crc32 (unsigned char *buf, int len, unsigned int crc) -{ - if (!crc32_table[1]) - { - /* Initialize the CRC table and the decoding table. */ - int i, j; - unsigned int c; - - for (i = 0; i < 256; i++) - { - for (c = i << 24, j = 8; j > 0; --j) - c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1); - crc32_table[i] = c; - } - } - - while (len--) - { - crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255]; - buf++; - } - return crc; -} - -/* compare-sections command - - With no arguments, compares each loadable section in the exec bfd - with the same memory range on the target, and reports mismatches. - Useful for verifying the image on the target against the exec file. - Depends on the target understanding the new "qCRC:" request. */ - -/* FIXME: cagney/1999-10-26: This command should be broken down into a - target method (target verify memory) and generic version of the - actual command. This will allow other high-level code (especially - generic_load()) to make use of this target functionality. */ - -static void -compare_sections_command (char *args, int from_tty) -{ - struct remote_state *rs = get_remote_state (); - asection *s; - unsigned long host_crc, target_crc; - extern bfd *exec_bfd; - struct cleanup *old_chain; - char *tmp; - char *sectdata; - const char *sectname; - char *buf = alloca (rs->remote_packet_size); - bfd_size_type size; - bfd_vma lma; - int matched = 0; - int mismatched = 0; - - if (!exec_bfd) - error ("command cannot be used without an exec file"); - if (!current_target.to_shortname || - strcmp (current_target.to_shortname, "remote") != 0) - error ("command can only be used with remote target"); - - for (s = exec_bfd->sections; s; s = s->next) - { - if (!(s->flags & SEC_LOAD)) - continue; /* skip non-loadable section */ - - size = bfd_get_section_size_before_reloc (s); - if (size == 0) - continue; /* skip zero-length section */ - - sectname = bfd_get_section_name (exec_bfd, s); - if (args && strcmp (args, sectname) != 0) - continue; /* not the section selected by user */ - - matched = 1; /* do this section */ - lma = s->lma; - /* FIXME: assumes lma can fit into long */ - sprintf (buf, "qCRC:%lx,%lx", (long) lma, (long) size); - putpkt (buf); - - /* be clever; compute the host_crc before waiting for target reply */ - sectdata = xmalloc (size); - old_chain = make_cleanup (xfree, sectdata); - bfd_get_section_contents (exec_bfd, s, sectdata, 0, size); - host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff); - - getpkt (buf, (rs->remote_packet_size), 0); - if (buf[0] == 'E') - error ("target memory fault, section %s, range 0x%08x -- 0x%08x", - sectname, lma, lma + size); - if (buf[0] != 'C') - error ("remote target does not support this operation"); - - for (target_crc = 0, tmp = &buf[1]; *tmp; tmp++) - target_crc = target_crc * 16 + fromhex (*tmp); - - printf_filtered ("Section %s, range 0x%s -- 0x%s: ", - sectname, paddr (lma), paddr (lma + size)); - if (host_crc == target_crc) - printf_filtered ("matched.\n"); - else - { - printf_filtered ("MIS-MATCHED!\n"); - mismatched++; - } - - do_cleanups (old_chain); - } - if (mismatched > 0) - warning ("One or more sections of the remote executable does not match\n\ -the loaded file\n"); - if (args && !matched) - printf_filtered ("No loaded section named '%s'.\n", args); -} - -static int -remote_query (int query_type, char *buf, char *outbuf, int *bufsiz) -{ - struct remote_state *rs = get_remote_state (); - int i; - char *buf2 = alloca (rs->remote_packet_size); - char *p2 = &buf2[0]; - - if (!bufsiz) - error ("null pointer to remote bufer size specified"); - - /* minimum outbuf size is (rs->remote_packet_size) - if bufsiz is not large enough let - the caller know and return what the minimum size is */ - /* Note: a zero bufsiz can be used to query the minimum buffer size */ - if (*bufsiz < (rs->remote_packet_size)) - { - *bufsiz = (rs->remote_packet_size); - return -1; - } - - /* except for querying the minimum buffer size, target must be open */ - if (!remote_desc) - error ("remote query is only available after target open"); - - /* we only take uppercase letters as query types, at least for now */ - if ((query_type < 'A') || (query_type > 'Z')) - error ("invalid remote query type"); - - if (!buf) - error ("null remote query specified"); - - if (!outbuf) - error ("remote query requires a buffer to receive data"); - - outbuf[0] = '\0'; - - *p2++ = 'q'; - *p2++ = query_type; - - /* we used one buffer char for the remote protocol q command and another - for the query type. As the remote protocol encapsulation uses 4 chars - plus one extra in case we are debugging (remote_debug), - we have PBUFZIZ - 7 left to pack the query string */ - i = 0; - while (buf[i] && (i < ((rs->remote_packet_size) - 8))) - { - /* bad caller may have sent forbidden characters */ - if ((!isprint (buf[i])) || (buf[i] == '$') || (buf[i] == '#')) - error ("illegal characters in query string"); - - *p2++ = buf[i]; - i++; - } - *p2 = buf[i]; - - if (buf[i]) - error ("query larger than available buffer"); - - i = putpkt (buf2); - if (i < 0) - return i; - - getpkt (outbuf, *bufsiz, 0); - - return 0; -} - -static void -remote_rcmd (char *command, - struct ui_file *outbuf) -{ - struct remote_state *rs = get_remote_state (); - int i; - char *buf = alloca (rs->remote_packet_size); - char *p = buf; - - if (!remote_desc) - error ("remote rcmd is only available after target open"); - - /* Send a NULL command across as an empty command */ - if (command == NULL) - command = ""; - - /* The query prefix */ - strcpy (buf, "qRcmd,"); - p = strchr (buf, '\0'); - - if ((strlen (buf) + strlen (command) * 2 + 8/*misc*/) > (rs->remote_packet_size)) - error ("\"monitor\" command ``%s'' is too long\n", command); - - /* Encode the actual command */ - bin2hex (command, p, 0); - - if (putpkt (buf) < 0) - error ("Communication problem with target\n"); - - /* get/display the response */ - while (1) - { - /* XXX - see also tracepoint.c:remote_get_noisy_reply() */ - buf[0] = '\0'; - getpkt (buf, (rs->remote_packet_size), 0); - if (buf[0] == '\0') - error ("Target does not support this command\n"); - if (buf[0] == 'O' && buf[1] != 'K') - { - remote_console_output (buf + 1); /* 'O' message from stub */ - continue; - } - if (strcmp (buf, "OK") == 0) - break; - if (strlen (buf) == 3 && buf[0] == 'E' - && isdigit (buf[1]) && isdigit (buf[2])) - { - error ("Protocol error with Rcmd"); - } - for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2) - { - char c = (fromhex (p[0]) << 4) + fromhex (p[1]); - fputc_unfiltered (c, outbuf); - } - break; - } -} - -static void -packet_command (char *args, int from_tty) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - - if (!remote_desc) - error ("command can only be used with remote target"); - - if (!args) - error ("remote-packet command requires packet text as argument"); - - puts_filtered ("sending: "); - print_packet (args); - puts_filtered ("\n"); - putpkt (args); - - getpkt (buf, (rs->remote_packet_size), 0); - puts_filtered ("received: "); - print_packet (buf); - puts_filtered ("\n"); -} - -#if 0 -/* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */ - -static void display_thread_info (struct gdb_ext_thread_info *info); - -static void threadset_test_cmd (char *cmd, int tty); - -static void threadalive_test (char *cmd, int tty); - -static void threadlist_test_cmd (char *cmd, int tty); - -int get_and_display_threadinfo (threadref * ref); - -static void threadinfo_test_cmd (char *cmd, int tty); - -static int thread_display_step (threadref * ref, void *context); - -static void threadlist_update_test_cmd (char *cmd, int tty); - -static void init_remote_threadtests (void); - -#define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */ - -static void -threadset_test_cmd (char *cmd, int tty) -{ - int sample_thread = SAMPLE_THREAD; - - printf_filtered ("Remote threadset test\n"); - set_thread (sample_thread, 1); -} - - -static void -threadalive_test (char *cmd, int tty) -{ - int sample_thread = SAMPLE_THREAD; - - if (remote_thread_alive (pid_to_ptid (sample_thread))) - printf_filtered ("PASS: Thread alive test\n"); - else - printf_filtered ("FAIL: Thread alive test\n"); -} - -void output_threadid (char *title, threadref * ref); - -void -output_threadid (char *title, threadref *ref) -{ - char hexid[20]; - - pack_threadid (&hexid[0], ref); /* Convert threead id into hex */ - hexid[16] = 0; - printf_filtered ("%s %s\n", title, (&hexid[0])); -} - -static void -threadlist_test_cmd (char *cmd, int tty) -{ - int startflag = 1; - threadref nextthread; - int done, result_count; - threadref threadlist[3]; - - printf_filtered ("Remote Threadlist test\n"); - if (!remote_get_threadlist (startflag, &nextthread, 3, &done, - &result_count, &threadlist[0])) - printf_filtered ("FAIL: threadlist test\n"); - else - { - threadref *scan = threadlist; - threadref *limit = scan + result_count; - - while (scan < limit) - output_threadid (" thread ", scan++); - } -} - -void -display_thread_info (struct gdb_ext_thread_info *info) -{ - output_threadid ("Threadid: ", &info->threadid); - printf_filtered ("Name: %s\n ", info->shortname); - printf_filtered ("State: %s\n", info->display); - printf_filtered ("other: %s\n\n", info->more_display); -} - -int -get_and_display_threadinfo (threadref *ref) -{ - int result; - int set; - struct gdb_ext_thread_info threadinfo; - - set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME - | TAG_MOREDISPLAY | TAG_DISPLAY; - if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo))) - display_thread_info (&threadinfo); - return result; -} - -static void -threadinfo_test_cmd (char *cmd, int tty) -{ - int athread = SAMPLE_THREAD; - threadref thread; - int set; - - int_to_threadref (&thread, athread); - printf_filtered ("Remote Threadinfo test\n"); - if (!get_and_display_threadinfo (&thread)) - printf_filtered ("FAIL cannot get thread info\n"); -} - -static int -thread_display_step (threadref *ref, void *context) -{ - /* output_threadid(" threadstep ",ref); *//* simple test */ - return get_and_display_threadinfo (ref); -} - -static void -threadlist_update_test_cmd (char *cmd, int tty) -{ - printf_filtered ("Remote Threadlist update test\n"); - remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS); -} - -static void -init_remote_threadtests (void) -{ - add_com ("tlist", class_obscure, threadlist_test_cmd, - "Fetch and print the remote list of thread identifiers, one pkt only"); - add_com ("tinfo", class_obscure, threadinfo_test_cmd, - "Fetch and display info about one thread"); - add_com ("tset", class_obscure, threadset_test_cmd, - "Test setting to a different thread"); - add_com ("tupd", class_obscure, threadlist_update_test_cmd, - "Iterate through updating all remote thread info"); - add_com ("talive", class_obscure, threadalive_test, - " Remote thread alive test "); -} - -#endif /* 0 */ - -/* Convert a thread ID to a string. Returns the string in a static - buffer. */ - -static char * -remote_pid_to_str (ptid_t ptid) -{ - static char buf[30]; - - sprintf (buf, "Thread %d", PIDGET (ptid)); - return buf; -} - -static void -init_remote_ops (void) -{ - remote_ops.to_shortname = "remote"; - remote_ops.to_longname = "Remote serial target in gdb-specific protocol"; - remote_ops.to_doc = - "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ -Specify the serial device it is connected to\n\ -(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."; - remote_ops.to_open = remote_open; - remote_ops.to_close = remote_close; - remote_ops.to_detach = remote_detach; - remote_ops.to_resume = remote_resume; - remote_ops.to_wait = remote_wait; - remote_ops.to_fetch_registers = remote_fetch_registers; - remote_ops.to_store_registers = remote_store_registers; - remote_ops.to_prepare_to_store = remote_prepare_to_store; - remote_ops.to_xfer_memory = remote_xfer_memory; - remote_ops.to_files_info = remote_files_info; - remote_ops.to_insert_breakpoint = remote_insert_breakpoint; - remote_ops.to_remove_breakpoint = remote_remove_breakpoint; - remote_ops.to_kill = remote_kill; - remote_ops.to_load = generic_load; - remote_ops.to_mourn_inferior = remote_mourn; - remote_ops.to_thread_alive = remote_thread_alive; - remote_ops.to_find_new_threads = remote_threads_info; - remote_ops.to_pid_to_str = remote_pid_to_str; - remote_ops.to_extra_thread_info = remote_threads_extra_info; - remote_ops.to_stop = remote_stop; - remote_ops.to_query = remote_query; - remote_ops.to_rcmd = remote_rcmd; - remote_ops.to_stratum = process_stratum; - remote_ops.to_has_all_memory = 1; - remote_ops.to_has_memory = 1; - remote_ops.to_has_stack = 1; - remote_ops.to_has_registers = 1; - remote_ops.to_has_execution = 1; - remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */ - remote_ops.to_magic = OPS_MAGIC; -} - -/* Set up the extended remote vector by making a copy of the standard - remote vector and adding to it. */ - -static void -init_extended_remote_ops (void) -{ - extended_remote_ops = remote_ops; - - extended_remote_ops.to_shortname = "extended-remote"; - extended_remote_ops.to_longname = - "Extended remote serial target in gdb-specific protocol"; - extended_remote_ops.to_doc = - "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ -Specify the serial device it is connected to (e.g. /dev/ttya).", - extended_remote_ops.to_open = extended_remote_open; - extended_remote_ops.to_create_inferior = extended_remote_create_inferior; - extended_remote_ops.to_mourn_inferior = extended_remote_mourn; -} - -/* - * Command: info remote-process - * - * This implements Cisco's version of the "info proc" command. - * - * This query allows the target stub to return an arbitrary string - * (or strings) giving arbitrary information about the target process. - * This is optional; the target stub isn't required to implement it. - * - * Syntax: qfProcessInfo request first string - * qsProcessInfo request subsequent string - * reply: 'O'<hex-encoded-string> - * 'l' last reply (empty) - */ - -static void -remote_info_process (char *args, int from_tty) -{ - struct remote_state *rs = get_remote_state (); - char *buf = alloca (rs->remote_packet_size); - - if (remote_desc == 0) - error ("Command can only be used when connected to the remote target."); - - putpkt ("qfProcessInfo"); - getpkt (buf, (rs->remote_packet_size), 0); - if (buf[0] == 0) - return; /* Silently: target does not support this feature. */ - - if (buf[0] == 'E') - error ("info proc: target error."); - - while (buf[0] == 'O') /* Capitol-O packet */ - { - remote_console_output (&buf[1]); - putpkt ("qsProcessInfo"); - getpkt (buf, (rs->remote_packet_size), 0); - } -} - -/* - * Target Cisco - */ - -static void -remote_cisco_open (char *name, int from_tty) -{ - if (name == 0) - error ("To open a remote debug connection, you need to specify what \n" - "device is attached to the remote system (e.g. host:port)."); - - /* See FIXME above */ - wait_forever_enabled_p = 1; - - target_preopen (from_tty); - - unpush_target (&remote_cisco_ops); - - remote_desc = serial_open (name); - if (!remote_desc) - perror_with_name (name); - - /* - * If a baud rate was specified on the gdb command line it will - * be greater than the initial value of -1. If it is, use it otherwise - * default to 9600 - */ - - baud_rate = (baud_rate > 0) ? baud_rate : 9600; - if (serial_setbaudrate (remote_desc, baud_rate)) - { - serial_close (remote_desc); - perror_with_name (name); - } - - serial_raw (remote_desc); - - /* If there is something sitting in the buffer we might take it as a - response to a command, which would be bad. */ - serial_flush_input (remote_desc); - - if (from_tty) - { - puts_filtered ("Remote debugging using "); - puts_filtered (name); - puts_filtered ("\n"); - } - - remote_cisco_mode = 1; - - push_target (&remote_cisco_ops); /* Switch to using cisco target now */ - - init_all_packet_configs (); - - general_thread = -2; - continue_thread = -2; - - /* Probe for ability to use "ThreadInfo" query, as required. */ - use_threadinfo_query = 1; - use_threadextra_query = 1; - - /* Without this, some commands which require an active target (such - as kill) won't work. This variable serves (at least) double duty - as both the pid of the target process (if it has such), and as a - flag indicating that a target is active. These functions should - be split out into seperate variables, especially since GDB will - someday have a notion of debugging several processes. */ - inferior_ptid = pid_to_ptid (MAGIC_NULL_PID); - - /* Start the remote connection; if error (0), discard this target. */ - - if (!catch_errors (remote_start_remote_dummy, (char *) 0, - "Couldn't establish connection to remote target\n", - RETURN_MASK_ALL)) - { - pop_target (); - return; - } -} - -static void -remote_cisco_close (int quitting) -{ - remote_cisco_mode = 0; - remote_close (quitting); -} - -static void -remote_cisco_mourn (void) -{ - remote_mourn_1 (&remote_cisco_ops); -} - -enum -{ - READ_MORE, - FATAL_ERROR, - ENTER_DEBUG, - DISCONNECT_TELNET -} -minitelnet_return; - -/* Shared between readsocket() and readtty(). The size is arbitrary, - however all targets are known to support a 400 character packet. */ -static char tty_input[400]; - -static int escape_count; -static int echo_check; -extern int quit_flag; - -static int -readsocket (void) -{ - int data; - - /* Loop until the socket doesn't have any more data */ - - while ((data = readchar (0)) >= 0) - { - /* Check for the escape sequence */ - if (data == '|') - { - /* If this is the fourth escape, get out */ - if (++escape_count == 4) - { - return ENTER_DEBUG; - } - else - { /* This is a '|', but not the fourth in a row. - Continue without echoing it. If it isn't actually - one of four in a row, it'll be echoed later. */ - continue; - } - } - else - /* Not a '|' */ - { - /* Ensure any pending '|'s are flushed. */ - - for (; escape_count > 0; escape_count--) - putchar ('|'); - } - - if (data == '\r') /* If this is a return character, */ - continue; /* - just supress it. */ - - if (echo_check != -1) /* Check for echo of user input. */ - { - if (tty_input[echo_check] == data) - { - gdb_assert (echo_check <= sizeof (tty_input)); - echo_check++; /* Character matched user input: */ - continue; /* Continue without echoing it. */ - } - else if ((data == '\n') && (tty_input[echo_check] == '\r')) - { /* End of the line (and of echo checking). */ - echo_check = -1; /* No more echo supression */ - continue; /* Continue without echoing. */ - } - else - { /* Failed check for echo of user input. - We now have some suppressed output to flush! */ - int j; - - for (j = 0; j < echo_check; j++) - putchar (tty_input[j]); - echo_check = -1; - } - } - putchar (data); /* Default case: output the char. */ - } - - if (data == SERIAL_TIMEOUT) /* Timeout returned from readchar. */ - return READ_MORE; /* Try to read some more */ - else - return FATAL_ERROR; /* Trouble, bail out */ -} - -static int -readtty (void) -{ - int tty_bytecount; - - /* First, read a buffer full from the terminal */ - tty_bytecount = read (fileno (stdin), tty_input, sizeof (tty_input) - 1); - if (tty_bytecount == -1) - { - perror ("readtty: read failed"); - return FATAL_ERROR; - } - - /* Remove a quoted newline. */ - if (tty_input[tty_bytecount - 1] == '\n' && - tty_input[tty_bytecount - 2] == '\\') /* line ending in backslash */ - { - tty_input[--tty_bytecount] = 0; /* remove newline */ - tty_input[--tty_bytecount] = 0; /* remove backslash */ - } - - /* Turn trailing newlines into returns */ - if (tty_input[tty_bytecount - 1] == '\n') - tty_input[tty_bytecount - 1] = '\r'; - - /* If the line consists of a ~, enter debugging mode. */ - if ((tty_input[0] == '~') && (tty_bytecount == 2)) - return ENTER_DEBUG; - - /* Make this a zero terminated string and write it out */ - tty_input[tty_bytecount] = 0; - if (serial_write (remote_desc, tty_input, tty_bytecount)) - { - perror_with_name ("readtty: write failed"); - return FATAL_ERROR; - } - - return READ_MORE; -} - -static int -minitelnet (void) -{ - fd_set input; /* file descriptors for select */ - int tablesize; /* max number of FDs for select */ - int status; - int quit_count = 0; - - extern int escape_count; /* global shared by readsocket */ - extern int echo_check; /* ditto */ - - escape_count = 0; - echo_check = -1; - - tablesize = 8 * sizeof (input); - - for (;;) - { - /* Check for anything from our socket - doesn't block. Note that - this must be done *before* the select as there may be - buffered I/O waiting to be processed. */ - - if ((status = readsocket ()) == FATAL_ERROR) - { - error ("Debugging terminated by communications error"); - } - else if (status != READ_MORE) - { - return (status); - } - - fflush (stdout); /* Flush output before blocking */ - - /* Now block on more socket input or TTY input */ - - FD_ZERO (&input); - FD_SET (fileno (stdin), &input); - FD_SET (deprecated_serial_fd (remote_desc), &input); - - status = select (tablesize, &input, 0, 0, 0); - if ((status == -1) && (errno != EINTR)) - { - error ("Communications error on select %d", errno); - } - - /* Handle Control-C typed */ - - if (quit_flag) - { - if ((++quit_count) == 2) - { - if (query ("Interrupt GDB? ")) - { - printf_filtered ("Interrupted by user.\n"); - return_to_top_level (RETURN_QUIT); - } - quit_count = 0; - } - quit_flag = 0; - - if (remote_break) - serial_send_break (remote_desc); - else - serial_write (remote_desc, "\003", 1); - - continue; - } - - /* Handle console input */ - - if (FD_ISSET (fileno (stdin), &input)) - { - quit_count = 0; - echo_check = 0; - status = readtty (); - if (status == READ_MORE) - continue; - - return status; /* telnet session ended */ - } - } -} - -static ptid_t -remote_cisco_wait (ptid_t ptid, struct target_waitstatus *status) -{ - if (minitelnet () != ENTER_DEBUG) - { - error ("Debugging session terminated by protocol error"); - } - putpkt ("?"); - return remote_wait (ptid, status); -} - -static void -init_remote_cisco_ops (void) -{ - remote_cisco_ops.to_shortname = "cisco"; - remote_cisco_ops.to_longname = "Remote serial target in cisco-specific protocol"; - remote_cisco_ops.to_doc = - "Use a remote machine via TCP, using a cisco-specific protocol.\n\ -Specify the serial device it is connected to (e.g. host:2020)."; - remote_cisco_ops.to_open = remote_cisco_open; - remote_cisco_ops.to_close = remote_cisco_close; - remote_cisco_ops.to_detach = remote_detach; - remote_cisco_ops.to_resume = remote_resume; - remote_cisco_ops.to_wait = remote_cisco_wait; - remote_cisco_ops.to_fetch_registers = remote_fetch_registers; - remote_cisco_ops.to_store_registers = remote_store_registers; - remote_cisco_ops.to_prepare_to_store = remote_prepare_to_store; - remote_cisco_ops.to_xfer_memory = remote_xfer_memory; - remote_cisco_ops.to_files_info = remote_files_info; - remote_cisco_ops.to_insert_breakpoint = remote_insert_breakpoint; - remote_cisco_ops.to_remove_breakpoint = remote_remove_breakpoint; - remote_cisco_ops.to_kill = remote_kill; - remote_cisco_ops.to_load = generic_load; - remote_cisco_ops.to_mourn_inferior = remote_cisco_mourn; - remote_cisco_ops.to_thread_alive = remote_thread_alive; - remote_cisco_ops.to_find_new_threads = remote_threads_info; - remote_cisco_ops.to_pid_to_str = remote_pid_to_str; - remote_cisco_ops.to_extra_thread_info = remote_threads_extra_info; - remote_cisco_ops.to_stratum = process_stratum; - remote_cisco_ops.to_has_all_memory = 1; - remote_cisco_ops.to_has_memory = 1; - remote_cisco_ops.to_has_stack = 1; - remote_cisco_ops.to_has_registers = 1; - remote_cisco_ops.to_has_execution = 1; - remote_cisco_ops.to_magic = OPS_MAGIC; -} - -static int -remote_can_async_p (void) -{ - /* We're async whenever the serial device is. */ - return (current_target.to_async_mask_value) && serial_can_async_p (remote_desc); -} - -static int -remote_is_async_p (void) -{ - /* We're async whenever the serial device is. */ - return (current_target.to_async_mask_value) && serial_is_async_p (remote_desc); -} - -/* Pass the SERIAL event on and up to the client. One day this code - will be able to delay notifying the client of an event until the - point where an entire packet has been received. */ - -static void (*async_client_callback) (enum inferior_event_type event_type, void *context); -static void *async_client_context; -static serial_event_ftype remote_async_serial_handler; - -static void -remote_async_serial_handler (struct serial *scb, void *context) -{ - /* Don't propogate error information up to the client. Instead let - the client find out about the error by querying the target. */ - async_client_callback (INF_REG_EVENT, async_client_context); -} - -static void -remote_async (void (*callback) (enum inferior_event_type event_type, void *context), void *context) -{ - if (current_target.to_async_mask_value == 0) - internal_error (__FILE__, __LINE__, - "Calling remote_async when async is masked"); - - if (callback != NULL) - { - serial_async (remote_desc, remote_async_serial_handler, NULL); - async_client_callback = callback; - async_client_context = context; - } - else - serial_async (remote_desc, NULL, NULL); -} - -/* Target async and target extended-async. - - This are temporary targets, until it is all tested. Eventually - async support will be incorporated int the usual 'remote' - target. */ - -static void -init_remote_async_ops (void) -{ - remote_async_ops.to_shortname = "async"; - remote_async_ops.to_longname = "Remote serial target in async version of the gdb-specific protocol"; - remote_async_ops.to_doc = - "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ -Specify the serial device it is connected to (e.g. /dev/ttya)."; - remote_async_ops.to_open = remote_async_open; - remote_async_ops.to_close = remote_close; - remote_async_ops.to_detach = remote_async_detach; - remote_async_ops.to_resume = remote_async_resume; - remote_async_ops.to_wait = remote_async_wait; - remote_async_ops.to_fetch_registers = remote_fetch_registers; - remote_async_ops.to_store_registers = remote_store_registers; - remote_async_ops.to_prepare_to_store = remote_prepare_to_store; - remote_async_ops.to_xfer_memory = remote_xfer_memory; - remote_async_ops.to_files_info = remote_files_info; - remote_async_ops.to_insert_breakpoint = remote_insert_breakpoint; - remote_async_ops.to_remove_breakpoint = remote_remove_breakpoint; - remote_async_ops.to_terminal_inferior = remote_async_terminal_inferior; - remote_async_ops.to_terminal_ours = remote_async_terminal_ours; - remote_async_ops.to_kill = remote_async_kill; - remote_async_ops.to_load = generic_load; - remote_async_ops.to_mourn_inferior = remote_async_mourn; - remote_async_ops.to_thread_alive = remote_thread_alive; - remote_async_ops.to_find_new_threads = remote_threads_info; - remote_async_ops.to_pid_to_str = remote_pid_to_str; - remote_async_ops.to_extra_thread_info = remote_threads_extra_info; - remote_async_ops.to_stop = remote_stop; - remote_async_ops.to_query = remote_query; - remote_async_ops.to_rcmd = remote_rcmd; - remote_async_ops.to_stratum = process_stratum; - remote_async_ops.to_has_all_memory = 1; - remote_async_ops.to_has_memory = 1; - remote_async_ops.to_has_stack = 1; - remote_async_ops.to_has_registers = 1; - remote_async_ops.to_has_execution = 1; - remote_async_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */ - remote_async_ops.to_can_async_p = remote_can_async_p; - remote_async_ops.to_is_async_p = remote_is_async_p; - remote_async_ops.to_async = remote_async; - remote_async_ops.to_async_mask_value = 1; - remote_async_ops.to_magic = OPS_MAGIC; -} - -/* Set up the async extended remote vector by making a copy of the standard - remote vector and adding to it. */ - -static void -init_extended_async_remote_ops (void) -{ - extended_async_remote_ops = remote_async_ops; - - extended_async_remote_ops.to_shortname = "extended-async"; - extended_async_remote_ops.to_longname = - "Extended remote serial target in async gdb-specific protocol"; - extended_async_remote_ops.to_doc = - "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\ -Specify the serial device it is connected to (e.g. /dev/ttya).", - extended_async_remote_ops.to_open = extended_remote_async_open; - extended_async_remote_ops.to_create_inferior = extended_remote_async_create_inferior; - extended_async_remote_ops.to_mourn_inferior = extended_remote_mourn; -} - -static void -set_remote_cmd (char *args, int from_tty) -{ -} - -static void -show_remote_cmd (char *args, int from_tty) -{ - - show_remote_protocol_Z_packet_cmd (args, from_tty); - show_remote_protocol_e_packet_cmd (args, from_tty); - show_remote_protocol_E_packet_cmd (args, from_tty); - show_remote_protocol_P_packet_cmd (args, from_tty); - show_remote_protocol_qSymbol_packet_cmd (args, from_tty); - show_remote_protocol_binary_download_cmd (args, from_tty); -} - -static void -build_remote_gdbarch_data (void) -{ - remote_address_size = TARGET_ADDR_BIT; -} - -/* Saved pointer to previous owner of the new_objfile event. */ -static void (*remote_new_objfile_chain) (struct objfile *); - -/* Function to be called whenever a new objfile (shlib) is detected. */ -static void -remote_new_objfile (struct objfile *objfile) -{ - if (remote_desc != 0) /* Have a remote connection */ - { - remote_check_symbols (objfile); - } - /* Call predecessor on chain, if any. */ - if (remote_new_objfile_chain != 0 && - remote_desc == 0) - remote_new_objfile_chain (objfile); -} - -void -_initialize_remote (void) -{ - static struct cmd_list_element *remote_set_cmdlist; - static struct cmd_list_element *remote_show_cmdlist; - struct cmd_list_element *tmpcmd; - - /* architecture specific data */ - remote_gdbarch_data_handle = register_gdbarch_data (init_remote_state, - free_remote_state); - - /* Old tacky stuff. NOTE: This comes after the remote protocol so - that the remote protocol has been initialized. */ - register_gdbarch_swap (&remote_address_size, - sizeof (&remote_address_size), NULL); - register_gdbarch_swap (NULL, 0, build_remote_gdbarch_data); - - init_remote_ops (); - add_target (&remote_ops); - - init_extended_remote_ops (); - add_target (&extended_remote_ops); - - init_remote_async_ops (); - add_target (&remote_async_ops); - - init_extended_async_remote_ops (); - add_target (&extended_async_remote_ops); - - init_remote_cisco_ops (); - add_target (&remote_cisco_ops); - - /* Hook into new objfile notification. */ - remote_new_objfile_chain = target_new_objfile_hook; - target_new_objfile_hook = remote_new_objfile; - -#if 0 - init_remote_threadtests (); -#endif - - /* set/show remote ... */ - - add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, "\ -Remote protocol specific variables\n\ -Configure various remote-protocol specific variables such as\n\ -the packets being used", - &remote_set_cmdlist, "set remote ", - 0/*allow-unknown*/, &setlist); - add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, "\ -Remote protocol specific variables\n\ -Configure various remote-protocol specific variables such as\n\ -the packets being used", - &remote_show_cmdlist, "show remote ", - 0/*allow-unknown*/, &showlist); - - add_cmd ("compare-sections", class_obscure, compare_sections_command, - "Compare section data on target to the exec file.\n\ -Argument is a single section name (default: all loaded sections).", - &cmdlist); - - add_cmd ("packet", class_maintenance, packet_command, - "Send an arbitrary packet to a remote target.\n\ - maintenance packet TEXT\n\ -If GDB is talking to an inferior via the GDB serial protocol, then\n\ -this command sends the string TEXT to the inferior, and displays the\n\ -response packet. GDB supplies the initial `$' character, and the\n\ -terminating `#' character and checksum.", - &maintenancelist); - - add_show_from_set - (add_set_boolean_cmd ("remotebreak", no_class, &remote_break, - "Set whether to send break if interrupted.\n", - &setlist), - &showlist); - - /* Install commands for configuring memory read/write packets. */ - - add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, - "Set the maximum number of bytes per memory write packet (deprecated).\n", - &setlist); - add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, - "Show the maximum number of bytes per memory write packet (deprecated).\n", - &showlist); - add_cmd ("memory-write-packet-size", no_class, - set_memory_write_packet_size, - "Set the maximum number of bytes per memory-write packet.\n" - "Specify the number of bytes in a packet or 0 (zero) for the\n" - "default packet size. The actual limit is further reduced\n" - "dependent on the target. Specify ``fixed'' to disable the\n" - "further restriction and ``limit'' to enable that restriction\n", - &remote_set_cmdlist); - add_cmd ("memory-read-packet-size", no_class, - set_memory_read_packet_size, - "Set the maximum number of bytes per memory-read packet.\n" - "Specify the number of bytes in a packet or 0 (zero) for the\n" - "default packet size. The actual limit is further reduced\n" - "dependent on the target. Specify ``fixed'' to disable the\n" - "further restriction and ``limit'' to enable that restriction\n", - &remote_set_cmdlist); - add_cmd ("memory-write-packet-size", no_class, - show_memory_write_packet_size, - "Show the maximum number of bytes per memory-write packet.\n", - &remote_show_cmdlist); - add_cmd ("memory-read-packet-size", no_class, - show_memory_read_packet_size, - "Show the maximum number of bytes per memory-read packet.\n", - &remote_show_cmdlist); - - add_show_from_set - (add_set_cmd ("remoteaddresssize", class_obscure, - var_integer, (char *) &remote_address_size, - "Set the maximum size of the address (in bits) \ -in a memory packet.\n", - &setlist), - &showlist); - - add_packet_config_cmd (&remote_protocol_binary_download, - "X", "binary-download", - set_remote_protocol_binary_download_cmd, - show_remote_protocol_binary_download_cmd, - &remote_set_cmdlist, &remote_show_cmdlist, - 1); -#if 0 - /* XXXX - should ``set remotebinarydownload'' be retained for - compatibility. */ - add_show_from_set - (add_set_cmd ("remotebinarydownload", no_class, - var_boolean, (char *) &remote_binary_download, - "Set binary downloads.\n", &setlist), - &showlist); -#endif - - add_info ("remote-process", remote_info_process, - "Query the remote system for process info."); - - add_packet_config_cmd (&remote_protocol_qSymbol, - "qSymbol", "symbol-lookup", - set_remote_protocol_qSymbol_packet_cmd, - show_remote_protocol_qSymbol_packet_cmd, - &remote_set_cmdlist, &remote_show_cmdlist, - 0); - - add_packet_config_cmd (&remote_protocol_e, - "e", "step-over-range", - set_remote_protocol_e_packet_cmd, - show_remote_protocol_e_packet_cmd, - &remote_set_cmdlist, &remote_show_cmdlist, - 0); - - add_packet_config_cmd (&remote_protocol_E, - "E", "step-over-range-w-signal", - set_remote_protocol_E_packet_cmd, - show_remote_protocol_E_packet_cmd, - &remote_set_cmdlist, &remote_show_cmdlist, - 0); - - add_packet_config_cmd (&remote_protocol_P, - "P", "set-register", - set_remote_protocol_P_packet_cmd, - show_remote_protocol_P_packet_cmd, - &remote_set_cmdlist, &remote_show_cmdlist, - 1); - - add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP], - "Z0", "software-breakpoint", - set_remote_protocol_Z_software_bp_packet_cmd, - show_remote_protocol_Z_software_bp_packet_cmd, - &remote_set_cmdlist, &remote_show_cmdlist, - 0); - - add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP], - "Z1", "hardware-breakpoint", - set_remote_protocol_Z_hardware_bp_packet_cmd, - show_remote_protocol_Z_hardware_bp_packet_cmd, - &remote_set_cmdlist, &remote_show_cmdlist, - 0); - - add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP], - "Z2", "write-watchpoint", - set_remote_protocol_Z_write_wp_packet_cmd, - show_remote_protocol_Z_write_wp_packet_cmd, - &remote_set_cmdlist, &remote_show_cmdlist, - 0); - - add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP], - "Z3", "read-watchpoint", - set_remote_protocol_Z_read_wp_packet_cmd, - show_remote_protocol_Z_read_wp_packet_cmd, - &remote_set_cmdlist, &remote_show_cmdlist, - 0); - - add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP], - "Z4", "access-watchpoint", - set_remote_protocol_Z_access_wp_packet_cmd, - show_remote_protocol_Z_access_wp_packet_cmd, - &remote_set_cmdlist, &remote_show_cmdlist, - 0); - - /* Keep the old ``set remote Z-packet ...'' working. */ - tmpcmd = add_set_auto_boolean_cmd ("Z-packet", class_obscure, - &remote_Z_packet_detect, - "\ -Set use of remote protocol `Z' packets", &remote_set_cmdlist); - set_cmd_sfunc (tmpcmd, set_remote_protocol_Z_packet_cmd); - add_cmd ("Z-packet", class_obscure, show_remote_protocol_Z_packet_cmd, - "Show use of remote protocol `Z' packets ", - &remote_show_cmdlist); -} |