diff options
Diffstat (limited to 'gdb/remote.c')
| -rw-r--r-- | gdb/remote.c | 805 |
1 files changed, 750 insertions, 55 deletions
diff --git a/gdb/remote.c b/gdb/remote.c index 2a1a8788bdc..e1b0b1ec6c1 100644 --- a/gdb/remote.c +++ b/gdb/remote.c @@ -141,6 +141,17 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ targets. or... XAA The process terminated with signal AA. + or (obsolete) NAA;tttttttt;dddddddd;bbbbbbbb + AA = signal number + tttttttt = address of symbol "_start" + dddddddd = base of data section + bbbbbbbb = base of bss section. + Note: only used by Cisco Systems + targets. The difference between this + reply and the "qOffsets" query is that + the 'N' packet may arrive spontaneously + whereas the 'qOffsets' is a query + initiated by the host debugger. or... OXX..XX XX..XX is hex encoding of ASCII data. This can happen at any time while the program is running and the debugger @@ -213,6 +224,8 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Prototypes for local functions */ +static void build_remote_gdbarch_data PARAMS ((void)); + static int remote_write_bytes PARAMS ((CORE_ADDR memaddr, char *myaddr, int len)); @@ -291,6 +304,10 @@ static void init_remote_ops PARAMS ((void)); static void init_extended_remote_ops PARAMS ((void)); +static void init_remote_cisco_ops PARAMS ((void)); + +static struct target_ops remote_cisco_ops; + static void remote_stop PARAMS ((void)); static int ishex PARAMS ((int ch, int *val)); @@ -366,6 +383,10 @@ static int remote_break; starts. */ static serial_t 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 (available to the user via "set remotebinarydownload") 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 @@ -451,7 +472,10 @@ record_currthread (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 (currthread)) - add_thread (currthread); + { + add_thread (currthread); + printf_filtered ("[New %s]\n", target_pid_to_str (currthread)); + } } #define MAGIC_NULL_PID 42000 @@ -1264,6 +1288,35 @@ remote_find_new_threads () inferior_pid = remote_current_thread (inferior_pid); } +static void +remote_threads_info (void) +{ + char buf[PBUFSIZ], *bufp; + int tid; + + if (remote_desc == 0) /* paranoia */ + error ("Command can only be used when connected to the remote target."); + + putpkt ("qfThreadInfo"); + getpkt (bufp = buf, 0); + if (bufp[0] == '\0') /* q packet not recognized! */ + { /* try old jmetzler method */ + remote_find_new_threads (); + return; + } + else /* try new 'q' method */ + while (*bufp++ == 'm') /* reply contains one or more TID */ + { + do { + tid = strtol(bufp, &bufp, 16); + if (tid != 0 && !in_thread_list (tid)) + add_thread (tid); + } while (*bufp++ == ','); /* comma-separated list */ + putpkt ("qsThreadInfo"); + getpkt (bufp = buf, 0); + } +} + /* Restart the remote side; this is an extended protocol operation. */ @@ -1381,9 +1434,142 @@ get_offsets () 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 (text_addr, data_addr, bss_addr, + text_offs, data_offs, bss_offs) + 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; + char *p; + + 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) + { + p = (unsigned char *) 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%x data = 0x%x bss = 0x%x\n", + (long) *text_offs, (long) *data_offs, (long) *bss_offs); + } + + return 0; +} + +/* + * Function: remote_cisco_objfile_relocate + * + * Relocate the symbol file for a remote target. + */ + +static void +remote_cisco_objfile_relocate (text_off, data_off, bss_off) + 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 (struct section_offsets) + + (symfile_objfile->num_sections + * sizeof (offs->offsets)))); + + memcpy (offs, symfile_objfile->section_offsets, + (sizeof (struct section_offsets) + + (symfile_objfile->num_sections + * sizeof (offs->offsets)))); + + ANOFFSET (offs, SECT_OFF_TEXT) = text_off; + ANOFFSET (offs, SECT_OFF_DATA) = data_off; + ANOFFSET (offs, SECT_OFF_BSS) = 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 (dummy) + char *dummy; +{ + start_remote (); /* Initialize gdb process mechanisms */ + return 1; +} + +static int remote_start_remote (dummy) PTR dummy; { @@ -1402,8 +1588,7 @@ remote_start_remote (dummy) putpkt ("?"); /* initiate a query from remote machine */ immediate_quit = 0; - start_remote (); /* Initialize gdb process mechanisms */ - return 1; + return remote_start_remote_dummy (dummy); } /* Open a connection to a remote debugger. @@ -1629,7 +1814,7 @@ remote_interrupt (signo) signal (signo, remote_interrupt_twice); if (remote_debug) - printf_unfiltered ("remote_interrupt called\n"); + fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n"); target_stop (); } @@ -1653,7 +1838,7 @@ remote_stop () { /* Send a break or a ^C, depending on user preference. */ if (remote_debug) - printf_unfiltered ("remote_stop called\n"); + fprintf_unfiltered (gdb_stdlog, "remote_stop called\n"); if (remote_break) SERIAL_SEND_BREAK (remote_desc); @@ -1701,9 +1886,10 @@ remote_console_output (msg) } } -/* Wait until the remote machine stops, then return, storing status in - STATUS just as `wait' would. Returns "pid" (though it's not clear - what, if anything, that means in the case of this target). */ +/* 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 int remote_wait (pid, status) @@ -1808,7 +1994,72 @@ Packet: '%s'\n", 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. */ @@ -1851,15 +2102,6 @@ Packet: '%s'\n", got_status: if (thread_num != -1) { - /* Initial thread value can only be acquired via wait, so deal with - this marker which is used before the first thread value is - acquired. */ - if (inferior_pid == MAGIC_NULL_PID) - { - inferior_pid = thread_num; - if (!in_thread_list (inferior_pid)) - add_thread (inferior_pid); - } return thread_num; } return inferior_pid; @@ -1901,7 +2143,8 @@ remote_fetch_registers (regno) && buf[0] != 'x') /* New: unavailable register value */ { if (remote_debug) - printf_unfiltered ("Bad register packet; fetching a new packet\n"); + fprintf_unfiltered (gdb_stdlog, + "Bad register packet; fetching a new packet\n"); getpkt (buf, 0); } @@ -2138,9 +2381,11 @@ check_binary_download (addr) if (remote_debug) { if (remote_binary_download) - printf_unfiltered ("binary downloading suppported by target\n"); + fprintf_unfiltered (gdb_stdlog, + "binary downloading suppported by target\n"); else - printf_unfiltered ("binary downloading NOT suppported by target\n"); + fprintf_unfiltered (gdb_stdlog, + "binary downloading NOT suppported by target\n"); } } @@ -2566,8 +2811,8 @@ putpkt_binary (buf, cnt) if (remote_debug) { *p = '\0'; - printf_unfiltered ("Sending packet: %s...", buf2); - gdb_flush (gdb_stdout); + fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", buf2); + gdb_flush (gdb_stdlog); } if (SERIAL_WRITE (remote_desc, buf2, p - buf2)) perror_with_name ("putpkt: write failed"); @@ -2596,7 +2841,7 @@ putpkt_binary (buf, cnt) { case '+': if (remote_debug) - printf_unfiltered ("Ack\n"); + fprintf_unfiltered (gdb_stdlog, "Ack\n"); return 1; case SERIAL_TIMEOUT: tcount ++; @@ -2618,9 +2863,9 @@ putpkt_binary (buf, cnt) if (!started_error_output) { started_error_output = 1; - printf_unfiltered ("putpkt: Junk: "); + fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: "); } - putchar_unfiltered (ch & 0177); + fputc_unfiltered (ch & 0177, gdb_stdlog); } continue; } @@ -2642,6 +2887,32 @@ putpkt_binary (buf, cnt) } } +static int remote_cisco_mode; + +static void remote_cisco_expand (src, dest) + char *src; + char *dest; +{ + int i; + int repeat; + + do { + if (*src == '*') + { + repeat = (fromhex (src[1]) << 4) + fromhex (src[2]); + for (i = 0; i < repeat; i++) + { + *dest++ = *(src-1); + } + src += 2; + } + else + { + *dest++ = *src; + } + } while (*src++); +} + /* Come here after finding the start of the frame. Collect the rest into BUF, verifying the checksum, length, and handling run-length compression. Returns 0 on any error, 1 on success. */ @@ -2665,11 +2936,12 @@ read_frame (buf) { case SERIAL_TIMEOUT: if (remote_debug) - puts_filtered ("Timeout in mid-packet, retrying\n"); + fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog); return 0; case '$': if (remote_debug) - puts_filtered ("Saw new packet start in middle of old one\n"); + fputs_filtered ("Saw new packet start in middle of old one\n", + gdb_stdlog); return 0; /* Start a new packet, count retries */ case '#': { @@ -2681,37 +2953,49 @@ read_frame (buf) pktcsum |= fromhex (readchar (remote_timeout)); if (csum == pktcsum) - return 1; + { + if (remote_cisco_mode) /* variant run-length-encoding */ + { + char tmp_buf[PBUFSIZ]; + + remote_cisco_expand (buf, tmp_buf); + strcpy (buf, tmp_buf); + } + return 1; + } if (remote_debug) { - printf_filtered ("Bad checksum, sentsum=0x%x, csum=0x%x, buf=", - pktcsum, csum); - puts_filtered (buf); - puts_filtered ("\n"); + 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); } return 0; } case '*': /* Run length encoding */ - csum += c; - c = readchar (remote_timeout); - csum += c; - c = c - ' ' + 3; /* Compute repeat count */ - - - if (c > 0 && c < 255 && bp + c - 1 < buf + PBUFSIZ - 1) + if (remote_cisco_mode == 0) /* variant run-length-encoding */ { - memset (bp, *(bp - 1), c); - bp += c; - continue; - } + csum += c; + c = readchar (remote_timeout); + csum += c; + c = c - ' ' + 3; /* Compute repeat count */ - *bp = '\0'; - printf_filtered ("Repeat count %d too large for buffer: ", c); - puts_filtered (buf); - puts_filtered ("\n"); - return 0; + if (c > 0 && c < 255 && bp + c - 1 < buf + PBUFSIZ - 1) + { + memset (bp, *(bp - 1), c); + bp += c; + continue; + } + *bp = '\0'; + printf_filtered ("Repeat count %d too large for buffer: ", c); + puts_filtered (buf); + puts_filtered ("\n"); + return 0; + } + /* else fall thru to treat like default */ default: if (bp < buf + PBUFSIZ - 1) { @@ -2779,7 +3063,7 @@ getpkt (buf, forever) error ("Watchdog has expired. Target detached.\n"); } if (remote_debug) - puts_filtered ("Timed out.\n"); + fputs_filtered ("Timed out.\n", gdb_stdlog); goto retry; } } @@ -2792,7 +3076,7 @@ getpkt (buf, forever) if (val == 1) { if (remote_debug) - fprintf_unfiltered (gdb_stdout, "Packet received: %s\n", buf); + fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", buf); SERIAL_WRITE (remote_desc, "+", 1); return; } @@ -3390,7 +3674,7 @@ Specify the serial device it is connected to (e.g. /dev/ttya)."; 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_find_new_threads; + remote_ops.to_find_new_threads = remote_threads_info; remote_ops.to_stop = remote_stop; remote_ops.to_query = remote_query; remote_ops.to_stratum = process_stratum; @@ -3411,21 +3695,425 @@ init_extended_remote_ops () { extended_remote_ops = remote_ops; - extended_remote_ops.to_shortname = "extended-remote"; + 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_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 (args, from_tty) + char *args; + int from_tty; +{ + char buf[PBUFSIZ]; + + if (remote_desc == 0) + error ("Command can only be used when connected to the remote target."); + + putpkt ("qfProcessInfo"); + getpkt (buf, 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, 0); + } +} + +/* + * Target Cisco + */ + +static void +remote_cisco_open (name, from_tty) + 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)."); + + target_preopen (from_tty); + + unpush_target (&remote_cisco_ops); + + remote_dcache = dcache_init (remote_read_bytes, remote_write_bytes); + + 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 */ + + /* Start out by trying the 'P' request to set registers. We set this each + time that we open a new target so that if the user switches from one + stub to another, we can (if the target is closed and reopened) cope. */ + stub_supports_P = 1; + + general_thread = -2; + continue_thread = -2; + + /* Force remote_write_bytes to check whether target supports + binary downloading. */ + remote_binary_checked = 0; + + /* 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_pid = 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 (quitting) + int quitting; +{ + remote_cisco_mode = 0; + remote_close (quitting); +} + +static void +remote_cisco_mourn PARAMS ((void)) +{ + remote_mourn_1 (&remote_cisco_ops); +} + +enum { + READ_MORE, + FATAL_ERROR, + ENTER_DEBUG, + DISCONNECT_TELNET +} minitelnet_return; + +/* shared between readsocket() and readtty() */ +static char *tty_input; + +static int escape_count; +static int echo_check; +extern int quit_flag; + +static int +readsocket () +{ + 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) + { + 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 () +{ + int status; + 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 () +{ + 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 (remote_desc->fd, &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 int +remote_cisco_wait (pid, status) + int pid; + struct target_waitstatus *status; +{ + if (minitelnet() != ENTER_DEBUG) + { + error ("Debugging session terminated by protocol error"); + } + putpkt ("?"); + return remote_wait (pid, status); +} + +static void +init_remote_cisco_ops () +{ + 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_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 void +build_remote_gdbarch_data () +{ + tty_input = xmalloc (PBUFSIZ); +} + void _initialize_remote () { - /* runtime constants */ + /* architecture specific data */ + build_remote_gdbarch_data (); + register_gdbarch_swap (&tty_input, sizeof (&tty_input), NULL); + register_gdbarch_swap (NULL, 0, build_remote_gdbarch_data); + + /* runtime constants - we retain the value of remote_write_size + across architecture swaps. */ remote_write_size = PBUFSIZ; init_remote_ops (); @@ -3434,6 +4122,9 @@ _initialize_remote () init_extended_remote_ops (); add_target (&extended_remote_ops); + init_remote_cisco_ops (); + add_target (&remote_cisco_ops); + #if 0 init_remote_threadtests (); #endif @@ -3487,4 +4178,8 @@ in a memory packet.\n", var_boolean, (char *) &remote_binary_download, "Set binary downloads.\n", &setlist), &showlist); + + add_info ("remote-process", remote_info_process, + "Query the remote system for process info."); + } |