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authorStan Shebs <shebs@apple.com>1999-04-16 01:35:26 +0000
committerStan Shebs <shebs@apple.com>1999-04-16 01:35:26 +0000
commit14cd51f7793a9ce07bc435069f57269450141363 (patch)
tree280a2da48f771d61be5b451ddbacdf9ef8e9ad13 /gdb/remote-rdp.c
downloadgdb-14cd51f7793a9ce07bc435069f57269450141363.tar.gz
Initial revision
Diffstat (limited to 'gdb/remote-rdp.c')
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diff --git a/gdb/remote-rdp.c b/gdb/remote-rdp.c
new file mode 100644
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+++ b/gdb/remote-rdp.c
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+/* Remote debugging for the ARM RDP interface.
+ Copyright 1994, 1995 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.
+
+
+ */
+
+
+/*
+ Much of this file (in particular the SWI stuff) is based on code by
+ David Taylor (djt1000@uk.ac.cam.hermes).
+
+ I hacked on and simplified it by removing a lot of sexy features he
+ had added, and some of the (unix specific) workarounds he'd done
+ for other GDB problems - which if they still exist should be fixed
+ in GDB, not in a remote-foo thing . I also made it conform more to
+ the doc I have; which may be wrong.
+
+ Steve Chamberlain (sac@cygnus.com).
+ */
+
+
+#include "defs.h"
+#include "inferior.h"
+#include "wait.h"
+#include "value.h"
+#include "callback.h"
+#include "command.h"
+#ifdef ANSI_PROTOTYPES
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+#include <ctype.h>
+#include <fcntl.h>
+#include "symfile.h"
+#include "remote-utils.h"
+#include "gdb_string.h"
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include "gdbcore.h"
+
+
+extern struct target_ops remote_rdp_ops;
+static serial_t io;
+static host_callback *callback = &default_callback;
+
+struct
+ {
+ int step_info;
+ int break_info;
+ int model_info;
+ int target_info;
+ int can_step;
+ char command_line[10];
+ int rdi_level;
+ int rdi_stopped_status;
+ }
+ds;
+
+
+
+/* Definitions for the RDP protocol. */
+
+#define RDP_MOUTHFULL (1<<6)
+#define FPU_COPRO_NUMBER 1
+
+#define RDP_OPEN 0
+#define RDP_OPEN_TYPE_COLD 0
+#define RDP_OPEN_TYPE_WARM 1
+#define RDP_OPEN_TYPE_BAUDRATE 2
+
+#define RDP_OPEN_BAUDRATE_9600 1
+#define RDP_OPEN_BAUDRATE_19200 2
+#define RDP_OPEN_BAUDRATE_38400 3
+
+#define RDP_OPEN_TYPE_RETURN_SEX (1<<3)
+
+#define RDP_CLOSE 1
+
+#define RDP_MEM_READ 2
+
+#define RDP_MEM_WRITE 3
+
+#define RDP_CPU_READ 4
+#define RDP_CPU_WRITE 5
+#define RDP_CPU_READWRITE_MODE_CURRENT 255
+#define RDP_CPU_READWRITE_MASK_PC (1<<16)
+#define RDP_CPU_READWRITE_MASK_CPSR (1<<17)
+#define RDP_CPU_READWRITE_MASK_SPSR (1<<18)
+
+#define RDP_COPRO_READ 6
+#define RDP_COPRO_WRITE 7
+#define RDP_FPU_READWRITE_MASK_FPS (1<<8)
+
+#define RDP_SET_BREAK 0xa
+#define RDP_SET_BREAK_TYPE_PC_EQUAL 0
+#define RDP_SET_BREAK_TYPE_GET_HANDLE (0x10)
+
+#define RDP_CLEAR_BREAK 0xb
+
+#define RDP_EXEC 0x10
+#define RDP_EXEC_TYPE_SYNC 0
+
+#define RDP_STEP 0x11
+
+#define RDP_INFO 0x12
+#define RDP_INFO_ABOUT_STEP 2
+#define RDP_INFO_ABOUT_STEP_GT_1 1
+#define RDP_INFO_ABOUT_STEP_TO_JMP 2
+#define RDP_INFO_ABOUT_STEP_1 4
+#define RDP_INFO_ABOUT_TARGET 0
+#define RDP_INFO_ABOUT_BREAK 1
+#define RDP_INFO_ABOUT_BREAK_COMP 1
+#define RDP_INFO_ABOUT_BREAK_RANGE 2
+#define RDP_INFO_ABOUT_BREAK_BYTE_READ 4
+#define RDP_INFO_ABOUT_BREAK_HALFWORD_READ 8
+#define RDP_INFO_ABOUT_BREAK_WORD_READ (1<<4)
+#define RDP_INFO_ABOUT_BREAK_BYTE_WRITE (1<<5)
+#define RDP_INFO_ABOUT_BREAK_HALFWORD_WRITE (1<<6)
+#define RDP_INFO_ABOUT_BREAK_WORD_WRITE (1<<7)
+#define RDP_INFO_ABOUT_BREAK_MASK (1<<8)
+#define RDP_INFO_ABOUT_BREAK_THREAD_BREAK (1<<9)
+#define RDP_INFO_ABOUT_BREAK_THREAD_WATCH (1<<10)
+#define RDP_INFO_ABOUT_BREAK_COND (1<<11)
+#define RDP_INFO_VECTOR_CATCH (0x180)
+#define RDP_INFO_ICEBREAKER (7)
+#define RDP_INFO_SET_CMDLINE (0x300)
+
+#define RDP_SELECT_CONFIG (0x16)
+#define RDI_ConfigCPU 0
+#define RDI_ConfigSystem 1
+#define RDI_MatchAny 0
+#define RDI_MatchExactly 1
+#define RDI_MatchNoEarlier 2
+
+#define RDP_RESET 0x7f
+
+/* Returns from RDP */
+#define RDP_RES_STOPPED 0x20
+#define RDP_RES_SWI 0x21
+#define RDP_RES_FATAL 0x5e
+#define RDP_RES_VALUE 0x5f
+#define RDP_RES_VALUE_LITTLE_ENDIAN 240
+#define RDP_RES_VALUE_BIG_ENDIAN 241
+#define RDP_RES_RESET 0x7f
+#define RDP_RES_AT_BREAKPOINT 143
+#define RDP_RES_IDUNNO 0xe6
+#define RDP_OSOpReply 0x13
+#define RDP_OSOpWord 2
+#define RDP_OSOpNothing 0
+
+static int timeout = 2;
+
+static char * commandline = NULL;
+
+static int
+remote_rdp_xfer_inferior_memory PARAMS ((CORE_ADDR memaddr,
+ char *myaddr,
+ int len,
+ int write,
+ struct target_ops * target));
+
+
+/* Stuff for talking to the serial layer. */
+
+static unsigned char
+get_byte ()
+{
+ int c = SERIAL_READCHAR (io, timeout);
+
+ if (remote_debug)
+ printf ("[%02x]\n", c);
+
+ if (c == SERIAL_TIMEOUT)
+ {
+ if (timeout == 0)
+ return (unsigned char) c;
+
+ error ("Timeout reading from remote_system");
+ }
+
+ return c;
+}
+
+/* Note that the target always speaks little-endian to us,
+ even if it's a big endian machine. */
+static unsigned int
+get_word ()
+{
+ unsigned int val = 0;
+ unsigned int c;
+ int n;
+ for (n = 0; n < 4; n++)
+ {
+ c = get_byte ();
+ val |= c << (n * 8);
+ }
+ return val;
+}
+
+static void
+put_byte (val)
+ char val;
+{
+ if (remote_debug)
+ printf ("(%02x)\n", val);
+ SERIAL_WRITE (io, &val, 1);
+}
+
+static void
+put_word (val)
+ int val;
+{
+ /* We always send in little endian */
+ unsigned char b[4];
+ b[0] = val;
+ b[1] = val >> 8;
+ b[2] = val >> 16;
+ b[3] = val >> 24;
+
+ if (remote_debug)
+ printf ("(%04x)", val);
+
+ SERIAL_WRITE (io, b, 4);
+}
+
+
+
+/* Stuff for talking to the RDP layer. */
+
+/* This is a bit more fancy that need be so that it syncs even in nasty cases.
+
+ I'be been unable to make it reliably sync up with the change
+ baudrate open command. It likes to sit and say it's been reset,
+ with no more action. So I took all that code out. I'd rather sync
+ reliably at 9600 than wait forever for a possible 19200 connection.
+
+ */
+static void
+rdp_init (cold, tty)
+ int cold;
+ int tty;
+{
+ int sync = 0;
+ int type = cold ? RDP_OPEN_TYPE_COLD : RDP_OPEN_TYPE_WARM;
+ int baudtry = 9600;
+
+ time_t now = time (0);
+ time_t stop_time = now + 10; /* Try and sync for 10 seconds, then give up */
+
+
+ while (time (0) < stop_time && !sync)
+ {
+ int restype;
+ QUIT;
+
+ SERIAL_FLUSH_INPUT (io);
+ SERIAL_FLUSH_OUTPUT (io);
+
+ if (tty)
+ printf_unfiltered ("Trying to connect at %d baud.\n", baudtry);
+
+ /*
+ ** It seems necessary to reset an EmbeddedICE to get it going.
+ ** This has the side benefit of displaying the startup banner.
+ */
+ if (cold)
+ {
+ put_byte (RDP_RESET);
+ while ((restype = SERIAL_READCHAR (io, 1)) > 0)
+ {
+ switch (restype)
+ {
+ case SERIAL_TIMEOUT:
+ break;
+ case RDP_RESET:
+ /* Sent at start of reset process: ignore */
+ break;
+ default:
+ printf_unfiltered ("%c", isgraph (restype) ? restype : ' ');
+ break;
+ }
+ }
+
+ if (restype == 0)
+ {
+ /* Got end-of-banner mark */
+ printf_filtered ("\n");
+ }
+ }
+
+ put_byte (RDP_OPEN);
+
+ put_byte (type | RDP_OPEN_TYPE_RETURN_SEX );
+ put_word (0);
+
+ while (!sync && (restype = SERIAL_READCHAR (io, 1)) > 0)
+ {
+ if (remote_debug)
+ printf_unfiltered ("[%02x]\n", restype);
+
+ switch (restype)
+ {
+ case SERIAL_TIMEOUT:
+ break;
+
+ case RDP_RESET:
+ while ((restype = SERIAL_READCHAR (io, 1)) == RDP_RESET)
+ ;
+ do
+ {
+ printf_unfiltered ("%c", isgraph (restype) ? restype : ' ');
+ }
+ while ((restype = SERIAL_READCHAR (io, 1)) > 0);
+
+ if (tty)
+ {
+ printf_unfiltered ("\nThe board has sent notification that it was reset.\n");
+ printf_unfiltered ("Waiting for it to settle down...\n");
+ }
+ sleep (3);
+ if (tty)
+ printf_unfiltered ("\nTrying again.\n");
+ cold = 0;
+ break;
+
+ default:
+ break;
+
+ case RDP_RES_VALUE:
+ {
+ int resval = SERIAL_READCHAR (io, 1);
+
+ if (remote_debug)
+ printf_unfiltered ("[%02x]\n", resval);
+
+ switch (resval)
+ {
+ case SERIAL_TIMEOUT:
+ break;
+ case RDP_RES_VALUE_LITTLE_ENDIAN:
+ target_byte_order = LITTLE_ENDIAN;
+ sync = 1;
+ break;
+ case RDP_RES_VALUE_BIG_ENDIAN:
+ target_byte_order = BIG_ENDIAN;
+ sync = 1;
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ }
+ }
+
+ if (!sync)
+ {
+ error ("Couldn't reset the board, try pressing the reset button");
+ }
+}
+
+
+#ifdef ANSI_PROTOTYPES
+void
+send_rdp (char *template,...)
+#else
+void
+send_rdp (char *template, va_alist)
+ va_dcl
+#endif
+{
+ char buf[200];
+ char *dst = buf;
+ va_list alist;
+#ifdef ANSI_PROTOTYPES
+ va_start (alist, template);
+#else
+ va_start (alist);
+#endif
+
+ while (*template)
+ {
+ unsigned int val;
+ int *pi;
+ int *pstat;
+ char *pc;
+ int i;
+ switch (*template++)
+ {
+ case 'b':
+ val = va_arg (alist, int);
+ *dst++ = val;
+ break;
+ case 'w':
+ val = va_arg (alist, int);
+ *dst++ = val;
+ *dst++ = val >> 8;
+ *dst++ = val >> 16;
+ *dst++ = val >> 24;
+ break;
+ case 'S':
+ val = get_byte ();
+ if (val != RDP_RES_VALUE)
+ {
+ printf_unfiltered ("got bad res value of %d, %x\n", val, val);
+ }
+ break;
+ case 'V':
+ pstat = va_arg (alist, int *);
+ pi = va_arg (alist, int *);
+
+ *pstat = get_byte ();
+ /* Check the result was zero, if not read the syndrome */
+ if (*pstat)
+ {
+ *pi = get_word ();
+ }
+ break;
+ case 'Z':
+ /* Check the result code */
+ switch (get_byte ())
+ {
+ case 0:
+ /* Success */
+ break;
+ case 253:
+ /* Target can't do it; never mind */
+ printf_unfiltered ("RDP: Insufficient privilege\n");
+ return;
+ case 254:
+ /* Target can't do it; never mind */
+ printf_unfiltered ("RDP: Unimplemented message\n");
+ return;
+ case 255:
+ error ("Command garbled");
+ break;
+ default:
+ error ("Corrupt reply from target");
+ break;
+ }
+ break;
+ case 'W':
+ /* Read a word from the target */
+ pi = va_arg (alist, int *);
+ *pi = get_word ();
+ break;
+ case 'P':
+ /* Read in some bytes from the target. */
+ pc = va_arg (alist, char *);
+ val = va_arg (alist, int);
+ for (i = 0; i < val; i++)
+ {
+ pc[i] = get_byte ();
+ }
+ break;
+ case 'p':
+ /* send what's being pointed at */
+ pc = va_arg (alist, char *);
+ val = va_arg (alist, int);
+ dst = buf;
+ SERIAL_WRITE (io, pc, val);
+ break;
+ case '-':
+ /* Send whats in the queue */
+ if (dst != buf)
+ {
+ SERIAL_WRITE (io, buf, dst - buf);
+ dst = buf;
+ }
+ break;
+ case 'B':
+ pi = va_arg (alist, int *);
+ *pi = get_byte ();
+ break;
+ default:
+ abort ();
+ }
+ }
+ va_end (args);
+
+ if (dst != buf)
+ abort ();
+}
+
+
+static int
+rdp_write (memaddr, buf, len)
+ CORE_ADDR memaddr;
+ char *buf;
+ int len;
+{
+ int res;
+ int val;
+
+ send_rdp ("bww-p-SV", RDP_MEM_WRITE, memaddr, len, buf, len, &res, &val);
+
+ if (res)
+ {
+ return val;
+ }
+ return len;
+}
+
+
+static int
+rdp_read (memaddr, buf, len)
+ CORE_ADDR memaddr;
+ char *buf;
+ int len;
+{
+ int res;
+ int val;
+ send_rdp ("bww-S-P-V",
+ RDP_MEM_READ, memaddr, len,
+ buf, len,
+ &res, &val);
+ if (res)
+ {
+ return val;
+ }
+ return len;
+}
+
+static void
+rdp_fetch_one_register (mask, buf)
+ int mask;
+ char *buf;
+{
+ int val;
+ send_rdp ("bbw-SWZ", RDP_CPU_READ, RDP_CPU_READWRITE_MODE_CURRENT, mask, &val);
+ store_signed_integer (buf, 4, val);
+}
+
+static void
+rdp_fetch_one_fpu_register (mask, buf)
+ int mask;
+ char *buf;
+{
+#if 0
+ /* !!! Since the PIE board doesn't work as documented,
+ and it doesn't have FPU hardware anyway and since it
+ slows everything down, I've disabled this. */
+ int val;
+ if (mask == RDP_FPU_READWRITE_MASK_FPS)
+ {
+ /* this guy is only a word */
+ send_rdp ("bbw-SWZ", RDP_COPRO_READ, FPU_COPRO_NUMBER, mask, &val);
+ store_signed_integer (buf, 4, val);
+ }
+ else
+ {
+ /* There are 12 bytes long
+ !! fixme about endianness
+ */
+ int dummy; /* I've seen these come back as four words !! */
+ send_rdp ("bbw-SWWWWZ", RDP_COPRO_READ, FPU_COPRO_NUMBER, mask, buf + 0, buf + 4, buf + 8, &dummy);
+ }
+#endif
+ memset (buf, 0, MAX_REGISTER_RAW_SIZE);
+}
+
+
+static void
+rdp_store_one_register (mask, buf)
+ int mask;
+ char *buf;
+{
+ int val = extract_unsigned_integer (buf, 4);
+
+ send_rdp ("bbww-SZ",
+ RDP_CPU_WRITE, RDP_CPU_READWRITE_MODE_CURRENT, mask, val);
+}
+
+
+static void
+rdp_store_one_fpu_register (mask, buf)
+ int mask;
+ char *buf;
+{
+#if 0
+ /* See comment in fetch_one_fpu_register */
+ if (mask == RDP_FPU_READWRITE_MASK_FPS)
+ {
+ int val = extract_unsigned_integer (buf, 4);
+ /* this guy is only a word */
+ send_rdp ("bbww-SZ", RDP_COPRO_WRITE,
+ FPU_COPRO_NUMBER,
+ mask, val);
+ }
+ else
+ {
+ /* There are 12 bytes long
+ !! fixme about endianness
+ */
+ int dummy = 0;
+ /* I've seen these come as four words, not the three advertized !! */
+ printf ("Sending mask %x\n", mask);
+ send_rdp ("bbwwwww-SZ",
+ RDP_COPRO_WRITE,
+ FPU_COPRO_NUMBER,
+ mask,
+ *(int *) (buf + 0),
+ *(int *) (buf + 4),
+ *(int *) (buf + 8),
+ 0);
+
+ printf ("done mask %x\n", mask);
+ }
+#endif
+}
+
+
+/* Convert between GDB requests and the RDP layer. */
+
+static void
+remote_rdp_fetch_register (regno)
+ int regno;
+{
+ if (regno == -1)
+ {
+ for (regno = 0; regno < NUM_REGS; regno++)
+ remote_rdp_fetch_register (regno);
+ }
+ else
+ {
+ char buf[MAX_REGISTER_RAW_SIZE];
+ if (regno < 15)
+ rdp_fetch_one_register (1 << regno, buf);
+ else if (regno == PC_REGNUM)
+ rdp_fetch_one_register (RDP_CPU_READWRITE_MASK_PC, buf);
+ else if (regno == PS_REGNUM)
+ rdp_fetch_one_register (RDP_CPU_READWRITE_MASK_CPSR, buf);
+ else if (regno == FPS_REGNUM)
+ rdp_fetch_one_fpu_register (RDP_FPU_READWRITE_MASK_FPS, buf);
+ else if (regno >= F0_REGNUM && regno <= F7_REGNUM)
+ rdp_fetch_one_fpu_register (1 << (regno - F0_REGNUM), buf);
+ else
+ {
+ printf ("Help me with fetch reg %d\n", regno);
+ }
+ supply_register (regno, buf);
+ }
+}
+
+
+static void
+remote_rdp_store_register (regno)
+ int regno;
+{
+ if (regno == -1)
+ {
+ for (regno = 0; regno < NUM_REGS; regno++)
+ remote_rdp_store_register (regno);
+ }
+ else
+ {
+ char tmp[MAX_REGISTER_RAW_SIZE];
+ read_register_gen (regno, tmp);
+ if (regno < 15)
+ rdp_store_one_register (1 << regno, tmp);
+ else if (regno == PC_REGNUM)
+ rdp_store_one_register (RDP_CPU_READWRITE_MASK_PC, tmp);
+ else if (regno == PS_REGNUM)
+ rdp_store_one_register (RDP_CPU_READWRITE_MASK_CPSR, tmp);
+ else if (regno >= F0_REGNUM && regno <= F7_REGNUM)
+ rdp_store_one_fpu_register (1 << (regno - F0_REGNUM), tmp);
+ else
+ {
+ printf ("Help me with reg %d\n", regno);
+ }
+ }
+}
+
+static void
+remote_rdp_kill ()
+{
+ callback->shutdown (callback);
+}
+
+
+static void
+rdp_info ()
+{
+ send_rdp ("bw-S-W-Z", RDP_INFO, RDP_INFO_ABOUT_STEP,
+ &ds.step_info);
+ send_rdp ("bw-S-W-Z", RDP_INFO, RDP_INFO_ABOUT_BREAK,
+ &ds.break_info);
+ send_rdp ("bw-S-WW-Z", RDP_INFO, RDP_INFO_ABOUT_TARGET,
+ &ds.target_info,
+ &ds.model_info);
+
+ ds.can_step = ds.step_info & RDP_INFO_ABOUT_STEP_1;
+
+ ds.rdi_level = (ds.target_info >> 5) & 3;
+}
+
+
+static void
+rdp_execute_start ()
+{
+ /* Start it off, but don't wait for it */
+ send_rdp ("bb-", RDP_EXEC, RDP_EXEC_TYPE_SYNC);
+}
+
+
+static void
+rdp_set_command_line (command, args)
+ char * command;
+ char * args;
+{
+ /*
+ ** We could use RDP_INFO_SET_CMDLINE to send this, but EmbeddedICE systems
+ ** don't implement that, and get all confused at the unexpected text.
+ ** Instead, just keep a copy, and send it when the target does a SWI_GetEnv
+ */
+
+ if (commandline != NULL)
+ free (commandline);
+
+ commandline = malloc (strlen (command) + strlen (args) + 2);
+ if (commandline != NULL)
+ {
+ strcpy (commandline, command);
+ strcat (commandline, " ");
+ strcat (commandline, args);
+ }
+}
+
+static void
+rdp_catch_vectors ()
+{
+ /*
+ ** We want the target monitor to intercept the abort vectors
+ ** i.e. stop the program if any of these are used.
+ */
+ send_rdp ("bww-SZ", RDP_INFO, RDP_INFO_VECTOR_CATCH,
+ /*
+ ** Specify a bitmask including
+ ** the reset vector
+ ** the undefined instruction vector
+ ** the prefetch abort vector
+ ** the data abort vector
+ ** the address exception vector
+ */
+ (1<<0)|(1<<1)|(1<<3)|(1<<4)|(1<<5)
+ );
+}
+
+
+
+#define a_byte 1
+#define a_word 2
+#define a_string 3
+
+
+typedef struct
+{
+ CORE_ADDR n;
+ const char *s;
+}
+argsin;
+
+#define ABYTE 1
+#define AWORD 2
+#define ASTRING 3
+#define ADDRLEN 4
+
+#define SWI_WriteC 0x0
+#define SWI_Write0 0x2
+#define SWI_ReadC 0x4
+#define SWI_CLI 0x5
+#define SWI_GetEnv 0x10
+#define SWI_Exit 0x11
+#define SWI_EnterOS 0x16
+
+#define SWI_GetErrno 0x60
+#define SWI_Clock 0x61
+
+#define SWI_Time 0x63
+#define SWI_Remove 0x64
+#define SWI_Rename 0x65
+#define SWI_Open 0x66
+
+#define SWI_Close 0x68
+#define SWI_Write 0x69
+#define SWI_Read 0x6a
+#define SWI_Seek 0x6b
+#define SWI_Flen 0x6c
+
+#define SWI_IsTTY 0x6e
+#define SWI_TmpNam 0x6f
+#define SWI_InstallHandler 0x70
+#define SWI_GenerateError 0x71
+
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+static int translate_open_mode[] =
+{
+ O_RDONLY, /* "r" */
+ O_RDONLY+O_BINARY, /* "rb" */
+ O_RDWR, /* "r+" */
+ O_RDWR +O_BINARY, /* "r+b" */
+ O_WRONLY +O_CREAT+O_TRUNC, /* "w" */
+ O_WRONLY+O_BINARY+O_CREAT+O_TRUNC, /* "wb" */
+ O_RDWR +O_CREAT+O_TRUNC, /* "w+" */
+ O_RDWR +O_BINARY+O_CREAT+O_TRUNC, /* "w+b" */
+ O_WRONLY +O_APPEND+O_CREAT,/* "a" */
+ O_WRONLY+O_BINARY+O_APPEND+O_CREAT,/* "ab" */
+ O_RDWR +O_APPEND+O_CREAT,/* "a+" */
+ O_RDWR +O_BINARY+O_APPEND+O_CREAT /* "a+b" */
+};
+
+static int
+exec_swi (swi, args)
+ int swi;
+ argsin *args;
+{
+ int i;
+ char c;
+ switch (swi)
+ {
+ case SWI_WriteC:
+ callback->write_stdout (callback, &c, 1);
+ return 0;
+ case SWI_Write0:
+ for (i = 0; i < args->n; i++)
+ callback->write_stdout (callback, args->s, strlen (args->s));
+ return 0;
+ case SWI_ReadC:
+ callback->read_stdin (callback, &c, 1);
+ args->n = c;
+ return 1;
+ case SWI_CLI:
+ args->n = callback->system (callback, args->s);
+ return 1;
+ case SWI_GetErrno:
+ args->n = callback->get_errno (callback);
+ return 1;
+ case SWI_Time:
+ args->n = callback->time (callback, NULL);
+ return 1;
+
+ case SWI_Clock :
+ /* return number of centi-seconds... */
+ args->n =
+#ifdef CLOCKS_PER_SEC
+ (CLOCKS_PER_SEC >= 100)
+ ? (clock() / (CLOCKS_PER_SEC / 100))
+ : ((clock() * 100) / CLOCKS_PER_SEC) ;
+#else
+ /* presume unix... clock() returns microseconds */
+ clock() / 10000 ;
+#endif
+ return 1 ;
+
+ case SWI_Remove:
+ args->n = callback->unlink (callback, args->s);
+ return 1;
+ case SWI_Rename:
+ args->n = callback->rename (callback, args[0].s, args[1].s);
+ return 1;
+
+ case SWI_Open:
+ /* Now we need to decode the Demon open mode */
+ i = translate_open_mode[args[1].n];
+
+ /* Filename ":tt" is special: it denotes stdin/out */
+ if (strcmp(args->s,":tt")==0)
+ {
+ if (i == O_RDONLY ) /* opening tty "r" */
+ args->n = 0 /* stdin */ ;
+ else
+ args->n = 1 /* stdout */ ;
+ }
+ else
+ args->n = callback->open (callback, args->s, i);
+ return 1;
+
+ case SWI_Close:
+ args->n = callback->close (callback, args->n);
+ return 1;
+
+ case SWI_Write:
+ /* Return the number of bytes *not* written */
+ args->n = args[1].n -
+ callback->write (callback, args[0].n, args[1].s, args[1].n);
+ return 1;
+
+ case SWI_Read:
+ {
+ char *copy = alloca (args[2].n);
+ int done = callback->read (callback, args[0].n, copy, args[2].n);
+ if (done > 0)
+ remote_rdp_xfer_inferior_memory (args[1].n, copy, done, 1, 0);
+ args->n = args[2].n-done;
+ return 1;
+ }
+
+ case SWI_Seek:
+ /* Return non-zero on failure */
+ args->n = callback->lseek (callback, args[0].n, args[1].n, 0) < 0;
+ return 1;
+
+ case SWI_Flen:
+ {
+ long old = callback->lseek (callback, args->n, 0, SEEK_CUR);
+ args->n = callback->lseek (callback, args->n, 0, SEEK_END);
+ callback->lseek (callback, args->n, old, 0);
+ return 1;
+ }
+
+ case SWI_IsTTY:
+ args->n = callback->isatty (callback, args->n);
+ return 1;
+
+ case SWI_GetEnv:
+ if (commandline != NULL)
+ {
+ int len = strlen (commandline);
+ if (len > 255)
+ {
+ len = 255;
+ commandline [255]='\0';
+ }
+ remote_rdp_xfer_inferior_memory (args[0].n,
+ commandline, len+1, 1, 0);
+ }
+ else
+ remote_rdp_xfer_inferior_memory (args[0].n, "", 1, 1, 0);
+ return 1;
+
+ default:
+ return 0;
+ }
+}
+
+
+static void
+handle_swi ()
+{
+ argsin args[3];
+ char *buf;
+ int len;
+ int count = 0;
+
+ int swino = get_word ();
+ int type = get_byte ();
+ while (type != 0)
+ {
+ switch (type & 0x3)
+ {
+ case ABYTE:
+ args[count].n = get_byte ();
+ break;
+
+ case AWORD:
+ args[count].n = get_word ();
+ break;
+
+ case ASTRING:
+ /* If the word is under 32 bytes it will be sent otherwise
+ an address to it is passed. Also: Special case of 255 */
+
+ len = get_byte ();
+ if (len > 32)
+ {
+ if (len == 255)
+ {
+ len = get_word ();
+ }
+ buf = alloca (len);
+ remote_rdp_xfer_inferior_memory (get_word (),
+ buf,
+ len,
+ 0,
+ 0);
+ }
+ else
+ {
+ int i;
+ buf = alloca (len + 1);
+ for (i = 0; i < len; i++)
+ buf[i] = get_byte ();
+ buf[i] = 0;
+ }
+ args[count].n = len;
+ args[count].s = buf;
+ break;
+
+ default:
+ error ("Unimplented SWI argument");
+ }
+
+ type = type >> 2;
+ count++;
+ }
+
+ if (exec_swi (swino, args))
+ {
+ /* We have two options here reply with either a byte or a word
+ which is stored in args[0].n. There is no harm in replying with
+ a word all the time, so thats what I do! */
+ send_rdp ("bbw-", RDP_OSOpReply, RDP_OSOpWord, args[0].n);
+ }
+ else
+ {
+ send_rdp ("bb-", RDP_OSOpReply, RDP_OSOpNothing);
+ }
+}
+
+static void
+rdp_execute_finish ()
+{
+ int running = 1;
+
+ while (running)
+ {
+ int res;
+ res = SERIAL_READCHAR (io, 1);
+ while (res == SERIAL_TIMEOUT)
+ {
+ QUIT;
+ printf_filtered ("Waiting for target..\n");
+ res = SERIAL_READCHAR (io, 1);
+ }
+
+ switch (res)
+ {
+ case RDP_RES_SWI:
+ handle_swi ();
+ break;
+ case RDP_RES_VALUE:
+ send_rdp ("B", &ds.rdi_stopped_status);
+ running = 0;
+ break;
+ case RDP_RESET:
+ printf_filtered ("Target reset\n");
+ running = 0;
+ break;
+ default:
+ printf_filtered ("Ignoring %x\n", res);
+ break;
+ }
+ }
+}
+
+
+static void
+rdp_execute ()
+{
+ rdp_execute_start ();
+ rdp_execute_finish ();
+}
+
+static int
+remote_rdp_insert_breakpoint (addr, save)
+ CORE_ADDR addr;
+ char *save;
+{
+ int res;
+ if (ds.rdi_level > 0)
+ {
+ send_rdp ("bwb-SWB",
+ RDP_SET_BREAK,
+ addr,
+ RDP_SET_BREAK_TYPE_PC_EQUAL | RDP_SET_BREAK_TYPE_GET_HANDLE,
+ save,
+ &res);
+ }
+ else
+ {
+ send_rdp ("bwb-SB",
+ RDP_SET_BREAK,
+ addr,
+ RDP_SET_BREAK_TYPE_PC_EQUAL,
+ &res);
+ }
+ return res;
+}
+
+static int
+remote_rdp_remove_breakpoint (addr, save)
+ CORE_ADDR addr;
+ char *save;
+{
+ int res;
+ if (ds.rdi_level > 0)
+ {
+ send_rdp ("b-p-S-B",
+ RDP_CLEAR_BREAK,
+ save, 4,
+ &res);
+ }
+ else
+ {
+ send_rdp ("bw-S-B",
+ RDP_CLEAR_BREAK,
+ addr,
+ &res);
+ }
+ return res;
+}
+
+static void
+rdp_step ()
+{
+ if (ds.can_step && 0)
+ {
+ /* The pie board can't do steps so I can't test this, and
+ the other code will always work. */
+ int status;
+ send_rdp ("bbw-S-B",
+ RDP_STEP, 0, 1,
+ &status);
+ }
+ else
+ {
+ char handle[4];
+ CORE_ADDR pc = read_register (PC_REGNUM);
+ pc = arm_get_next_pc (pc);
+ remote_rdp_insert_breakpoint (pc, &handle);
+ rdp_execute ();
+ remote_rdp_remove_breakpoint (pc, &handle);
+ }
+}
+
+static void
+remote_rdp_open (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ int not_icebreaker;
+
+ if (!args)
+ error_no_arg ("serial port device name");
+
+ baud_rate = 9600;
+
+ target_preopen (from_tty);
+
+ io = SERIAL_OPEN (args);
+
+ if (!io)
+ perror_with_name (args);
+
+ SERIAL_RAW (io);
+
+ rdp_init (1, from_tty);
+
+
+ if (from_tty)
+ {
+ printf_unfiltered ("Remote RDP debugging using %s at %d baud\n", args, baud_rate);
+ }
+
+ rdp_info ();
+
+ /* Need to set up the vector interception state */
+ rdp_catch_vectors();
+
+ /*
+ ** If it's an EmbeddedICE, we need to set the processor config.
+ ** Assume we can always have ARM7TDI...
+ */
+ send_rdp ("bw-SB", RDP_INFO, RDP_INFO_ICEBREAKER, & not_icebreaker);
+ if (!not_icebreaker)
+ {
+ const char * CPU = "ARM7TDI";
+ int ICEversion;
+ int len = strlen (CPU);
+
+ send_rdp ("bbbbw-p-SWZ",
+ RDP_SELECT_CONFIG,
+ RDI_ConfigCPU, /* Aspect: set the CPU */
+ len, /* The number of bytes in the name */
+ RDI_MatchAny, /* We'll take whatever we get */
+ 0, /* We'll take whatever version's there */
+ CPU,len,
+ & ICEversion);
+ }
+
+ /* command line initialised on 'run'*/
+
+ push_target (& remote_rdp_ops);
+
+ callback->init (callback);
+ flush_cached_frames ();
+ registers_changed ();
+ stop_pc = read_pc ();
+ set_current_frame (create_new_frame (read_fp (), stop_pc));
+ select_frame (get_current_frame (), 0);
+ print_stack_frame (selected_frame, -1, 1);
+}
+
+
+
+/* Close out all files and local state before this target loses control. */
+
+static void
+remote_rdp_close (quitting)
+ int quitting;
+{
+ callback->shutdown (callback);
+ if (io)
+ SERIAL_CLOSE (io);
+ io = 0;
+}
+
+
+/* Resume execution of the target process. STEP says whether to single-step
+ or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given
+ to the target, or zero for no signal. */
+
+static void
+remote_rdp_resume (pid, step, siggnal)
+ int pid, step;
+ enum target_signal siggnal;
+{
+ if (step)
+ rdp_step ();
+ else
+ rdp_execute ();
+}
+
+/* Wait for inferior process to do something. Return pid of child,
+ or -1 in case of error; store status through argument pointer STATUS,
+ just as `wait' would. */
+
+static int
+remote_rdp_wait (pid, status)
+ int pid;
+ struct target_waitstatus *status;
+{
+ switch (ds.rdi_stopped_status)
+ {
+ default:
+ case RDP_RES_RESET:
+ case RDP_RES_SWI:
+ status->kind = TARGET_WAITKIND_EXITED;
+ status->value.integer = read_register (0);
+ break;
+ case RDP_RES_AT_BREAKPOINT:
+ status->kind = TARGET_WAITKIND_STOPPED;
+ /* The signal in sigrc is a host signal. That probably
+ should be fixed. */
+ status->value.sig = TARGET_SIGNAL_TRAP;
+ break;
+#if 0
+ case rdp_signalled:
+ status->kind = TARGET_WAITKIND_SIGNALLED;
+ /* The signal in sigrc is a host signal. That probably
+ should be fixed. */
+ status->value.sig = target_signal_from_host (sigrc);
+ break;
+#endif
+ }
+
+ return inferior_pid;
+}
+
+/* Get ready to modify the registers array. On machines which store
+ individual registers, this doesn't need to do anything. On machines
+ which store all the registers in one fell swoop, this makes sure
+ that registers contains all the registers from the program being
+ debugged. */
+
+static void
+remote_rdp_prepare_to_store ()
+{
+ /* Do nothing, since we can store individual regs */
+}
+
+static int
+remote_rdp_xfer_inferior_memory (memaddr, myaddr, len, write, target)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+ int write;
+ struct target_ops *target; /* ignored */
+{
+ /* I infer from D Taylor's code that there's a limit on the amount
+ we can transfer in one chunk.. */
+ int done = 0;
+ while (done < len)
+ {
+ int justdone;
+ int thisbite = len - done;
+ if (thisbite > RDP_MOUTHFULL)
+ thisbite = RDP_MOUTHFULL;
+
+ QUIT;
+
+ if (write)
+ {
+ justdone = rdp_write (memaddr + done, myaddr + done, thisbite);
+ }
+ else
+ {
+ justdone = rdp_read (memaddr + done, myaddr + done, thisbite);
+ }
+
+ done += justdone;
+
+ if (justdone != thisbite)
+ break;
+ }
+ return done;
+}
+
+
+
+struct yn
+{
+ const char *name;
+ int bit;
+};
+static struct yn stepinfo[] =
+{
+ {"Step more than one instruction", RDP_INFO_ABOUT_STEP_GT_1},
+ {"Step to jump", RDP_INFO_ABOUT_STEP_TO_JMP},
+ {"Step one instruction", RDP_INFO_ABOUT_STEP_1},
+ {0}
+};
+
+static struct yn breakinfo[] =
+{
+ {"comparison breakpoints supported", RDP_INFO_ABOUT_BREAK_COMP},
+ {"range breakpoints supported", RDP_INFO_ABOUT_BREAK_RANGE},
+ {"watchpoints for byte reads supported", RDP_INFO_ABOUT_BREAK_BYTE_READ},
+ {"watchpoints for half-word reads supported", RDP_INFO_ABOUT_BREAK_HALFWORD_READ},
+ {"watchpoints for word reads supported", RDP_INFO_ABOUT_BREAK_WORD_READ},
+ {"watchpoints for byte writes supported", RDP_INFO_ABOUT_BREAK_BYTE_WRITE},
+ {"watchpoints for half-word writes supported", RDP_INFO_ABOUT_BREAK_HALFWORD_WRITE},
+ {"watchpoints for word writes supported", RDP_INFO_ABOUT_BREAK_WORD_WRITE},
+ {"mask break/watch-points supported", RDP_INFO_ABOUT_BREAK_MASK},
+{"thread-specific breakpoints supported", RDP_INFO_ABOUT_BREAK_THREAD_BREAK},
+{"thread-specific watchpoints supported", RDP_INFO_ABOUT_BREAK_THREAD_WATCH},
+ {"conditional breakpoints supported", RDP_INFO_ABOUT_BREAK_COND},
+ {0}
+};
+
+
+static void
+dump_bits (t, info)
+ struct yn *t;
+ int info;
+{
+ while (t->name)
+ {
+ printf_unfiltered (" %-45s : %s\n", t->name, (info & t->bit) ? "Yes" : "No");
+ t++;
+ }
+}
+
+static void
+remote_rdp_files_info (target)
+ struct target_ops *target;
+{
+ printf_filtered ("Target capabilities:\n");
+ dump_bits (stepinfo, ds.step_info);
+ dump_bits (breakinfo, ds.break_info);
+ printf_unfiltered ("target level RDI %x\n", (ds.target_info >> 5) & 3);
+}
+
+
+static void
+remote_rdp_create_inferior (exec_file, allargs, env)
+ char * exec_file;
+ char * allargs;
+ char ** env;
+{
+ CORE_ADDR entry_point;
+
+ if (exec_file == 0 || exec_bfd == 0)
+ error ("No executable file specified.");
+
+ entry_point = (CORE_ADDR) bfd_get_start_address (exec_bfd);
+
+ remote_rdp_kill ();
+ remove_breakpoints ();
+ init_wait_for_inferior ();
+
+ /* This gives us a chance to set up the command line */
+ rdp_set_command_line (exec_file, allargs);
+
+ inferior_pid = 42;
+ insert_breakpoints (); /* Needed to get correct instruction in cache */
+
+ /*
+ ** RDP targets don't provide any facility to set the top of memory,
+ ** so we don't bother to look for MEMSIZE in the environment.
+ */
+
+ /* Let's go! */
+ proceed (entry_point, TARGET_SIGNAL_DEFAULT, 0);
+}
+
+/* Accept any stray run/attach commands */
+static int
+remote_rdp_can_run()
+{
+ return 1;
+}
+
+/* Attach doesn't need to do anything */
+static void
+remote_rdp_attach(args, from_tty)
+ char * args;
+ int from_tty;
+{
+ return;
+}
+
+/* Define the target subroutine names */
+
+struct target_ops remote_rdp_ops ;
+
+static void
+init_remote_rdp_ops(void)
+{
+ remote_rdp_ops.to_shortname = "rdp";
+ remote_rdp_ops.to_longname = "Remote Target using the RDProtocol";
+ remote_rdp_ops.to_doc = "Use a remote ARM system which uses the ARM Remote Debugging Protocol";
+ remote_rdp_ops.to_open = remote_rdp_open;
+ remote_rdp_ops.to_close = remote_rdp_close;
+ remote_rdp_ops.to_attach = remote_rdp_attach;
+ remote_rdp_ops.to_post_attach = NULL;
+ remote_rdp_ops.to_require_attach = NULL;
+ remote_rdp_ops.to_detach = NULL;
+ remote_rdp_ops.to_require_detach = NULL;
+ remote_rdp_ops.to_resume = remote_rdp_resume;
+ remote_rdp_ops.to_wait = remote_rdp_wait;
+ remote_rdp_ops.to_post_wait = NULL;
+ remote_rdp_ops.to_fetch_registers = remote_rdp_fetch_register;
+ remote_rdp_ops.to_store_registers = remote_rdp_store_register;
+ remote_rdp_ops.to_prepare_to_store = remote_rdp_prepare_to_store;
+ remote_rdp_ops.to_xfer_memory = remote_rdp_xfer_inferior_memory;
+ remote_rdp_ops.to_files_info = remote_rdp_files_info;
+ remote_rdp_ops.to_insert_breakpoint = remote_rdp_insert_breakpoint;
+ remote_rdp_ops.to_remove_breakpoint = remote_rdp_remove_breakpoint;
+ remote_rdp_ops.to_terminal_init = NULL;
+ remote_rdp_ops.to_terminal_inferior = NULL;
+ remote_rdp_ops.to_terminal_ours_for_output = NULL;
+ remote_rdp_ops.to_terminal_ours = NULL;
+ remote_rdp_ops.to_terminal_info = NULL;
+ remote_rdp_ops.to_kill = remote_rdp_kill;
+ remote_rdp_ops.to_load = generic_load;
+ remote_rdp_ops.to_lookup_symbol = NULL;
+ remote_rdp_ops.to_create_inferior = remote_rdp_create_inferior;
+ remote_rdp_ops.to_post_startup_inferior = NULL;
+ remote_rdp_ops.to_acknowledge_created_inferior = NULL;
+ remote_rdp_ops.to_clone_and_follow_inferior = NULL;
+ remote_rdp_ops.to_post_follow_inferior_by_clone = NULL;
+ remote_rdp_ops.to_insert_fork_catchpoint = NULL;
+ remote_rdp_ops.to_remove_fork_catchpoint = NULL;
+ remote_rdp_ops.to_insert_vfork_catchpoint = NULL;
+ remote_rdp_ops.to_remove_vfork_catchpoint = NULL;
+ remote_rdp_ops.to_has_forked = NULL;
+ remote_rdp_ops.to_has_vforked = NULL;
+ remote_rdp_ops.to_can_follow_vfork_prior_to_exec = NULL;
+ remote_rdp_ops.to_post_follow_vfork = NULL;
+ remote_rdp_ops.to_insert_exec_catchpoint = NULL;
+ remote_rdp_ops.to_remove_exec_catchpoint = NULL;
+ remote_rdp_ops.to_has_execd = NULL;
+ remote_rdp_ops.to_reported_exec_events_per_exec_call = NULL;
+ remote_rdp_ops.to_has_exited = NULL;
+ remote_rdp_ops.to_mourn_inferior = generic_mourn_inferior;
+ remote_rdp_ops.to_can_run = remote_rdp_can_run;
+ remote_rdp_ops.to_notice_signals = 0;
+ remote_rdp_ops.to_thread_alive = 0;
+ remote_rdp_ops.to_stop = 0;
+ remote_rdp_ops.to_pid_to_exec_file = NULL;
+ remote_rdp_ops.to_core_file_to_sym_file = NULL;
+ remote_rdp_ops.to_stratum = process_stratum;
+ remote_rdp_ops.DONT_USE = NULL;
+ remote_rdp_ops.to_has_all_memory = 1;
+ remote_rdp_ops.to_has_memory = 1;
+ remote_rdp_ops.to_has_stack = 1;
+ remote_rdp_ops.to_has_registers = 1;
+ remote_rdp_ops.to_has_execution = 1;
+ remote_rdp_ops.to_sections = NULL;
+ remote_rdp_ops.to_sections_end = NULL;
+ remote_rdp_ops.to_magic = OPS_MAGIC;
+}
+
+void
+_initialize_remote_rdp ()
+{
+ init_remote_rdp_ops() ;
+ add_target (&remote_rdp_ops);
+}