diff options
Diffstat (limited to 'tools/debugger/gdb/gdb-6.2.1-xen-sparse/gdb/gdbserver/server.c')
| -rw-r--r-- | tools/debugger/gdb/gdb-6.2.1-xen-sparse/gdb/gdbserver/server.c | 676 |
1 files changed, 0 insertions, 676 deletions
diff --git a/tools/debugger/gdb/gdb-6.2.1-xen-sparse/gdb/gdbserver/server.c b/tools/debugger/gdb/gdb-6.2.1-xen-sparse/gdb/gdbserver/server.c deleted file mode 100644 index 492aab47c0..0000000000 --- a/tools/debugger/gdb/gdb-6.2.1-xen-sparse/gdb/gdbserver/server.c +++ /dev/null @@ -1,676 +0,0 @@ -/* Main code for remote server for GDB. - Copyright 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2002, 2003, 2004 - 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. */ - -#include "server.h" -#include "linux-low.h" -#include <unistd.h> -#include <signal.h> -#include <sys/wait.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> - -int cont_thread; -int general_thread; -int step_thread; -int thread_from_wait; -int old_thread_from_wait; -int extended_protocol; -int server_waiting; -int isfile = 0; - -jmp_buf toplevel; - -/* The PID of the originally created or attached inferior. Used to - send signals to the process when GDB sends us an asynchronous interrupt - (user hitting Control-C in the client), and to wait for the child to exit - when no longer debugging it. */ - -int signal_pid; - -static unsigned char -start_inferior (char *argv[], char *statusptr) -{ - signal (SIGTTOU, SIG_DFL); - signal (SIGTTIN, SIG_DFL); - - signal_pid = create_inferior (argv[0], argv); - - fprintf (stderr, "Process %s created; pid = %d\n", argv[0], - signal_pid); - - signal (SIGTTOU, SIG_IGN); - signal (SIGTTIN, SIG_IGN); - tcsetpgrp (fileno (stderr), signal_pid); - - /* Wait till we are at 1st instruction in program, return signal number. */ - return mywait (statusptr, 0); -} - -static int -attach_inferior (int pid, char *statusptr, unsigned char *sigptr) -{ - /* myattach should return -1 if attaching is unsupported, - 0 if it succeeded, and call error() otherwise. */ - - if (myattach (pid) != 0) - return -1; - - fprintf (stderr, "Attached; pid = %d\n", pid); - - /* FIXME - It may be that we should get the SIGNAL_PID from the - attach function, so that it can be the main thread instead of - whichever we were told to attach to. */ - signal_pid = pid; - - *sigptr = mywait (statusptr, 0); - - return 0; -} - -extern int remote_debug; - -/* Handle all of the extended 'q' packets. */ -void -handle_query (char *own_buf) -{ - static struct inferior_list_entry *thread_ptr; - - if (strcmp ("qSymbol::", own_buf) == 0) - { - if (the_target->look_up_symbols != NULL) - (*the_target->look_up_symbols) (); - - strcpy (own_buf, "OK"); - return; - } - if (strcmp ("qC", own_buf) == 0) - { - struct process_info *process; - if (current_inferior == NULL) - return; - process = get_thread_process(current_inferior); - sprintf(own_buf, "QC%x", process->thread_known ? process->tid : 0); - - } - if (strcmp ("qfThreadInfo", own_buf) == 0) - { - thread_ptr = all_threads.head; - sprintf (own_buf, "m%x", thread_ptr->id); - thread_ptr = thread_ptr->next; - return; - } - - if (strcmp ("qsThreadInfo", own_buf) == 0) - { - if (thread_ptr != NULL) - { - sprintf (own_buf, "m%x", thread_ptr->id); - thread_ptr = thread_ptr->next; - return; - } - else - { - sprintf (own_buf, "l"); - return; - } - } - - if (the_target->read_auxv != NULL - && strncmp ("qPart:auxv:read::", own_buf, 17) == 0) - { - char data[(PBUFSIZ - 1) / 2]; - CORE_ADDR ofs; - unsigned int len; - int n; - decode_m_packet (&own_buf[17], &ofs, &len); /* "OFS,LEN" */ - if (len > sizeof data) - len = sizeof data; - n = (*the_target->read_auxv) (ofs, data, len); - if (n == 0) - write_ok (own_buf); - else if (n < 0) - write_enn (own_buf); - else - convert_int_to_ascii (data, own_buf, n); - return; - } - - /* Otherwise we didn't know what packet it was. Say we didn't - understand it. */ - own_buf[0] = 0; -} - -/* Parse vCont packets. */ -void -handle_v_cont (char *own_buf, char *status, unsigned char *signal) -{ - char *p, *q; - int n = 0, i = 0; - struct thread_resume *resume_info, default_action; - - /* Count the number of semicolons in the packet. There should be one - for every action. */ - p = &own_buf[5]; - while (p) - { - n++; - p++; - p = strchr (p, ';'); - } - /* Allocate room for one extra action, for the default remain-stopped - behavior; if no default action is in the list, we'll need the extra - slot. */ - resume_info = malloc ((n + 1) * sizeof (resume_info[0])); - - default_action.thread = -1; - default_action.leave_stopped = 1; - default_action.step = 0; - default_action.sig = 0; - - p = &own_buf[5]; - i = 0; - while (*p) - { - p++; - - resume_info[i].leave_stopped = 0; - - if (p[0] == 's' || p[0] == 'S') - resume_info[i].step = 1; - else if (p[0] == 'c' || p[0] == 'C') - resume_info[i].step = 0; - else - goto err; - - if (p[0] == 'S' || p[0] == 'C') - { - int sig; - sig = strtol (p + 1, &q, 16); - if (p == q) - goto err; - p = q; - - if (!target_signal_to_host_p (sig)) - goto err; - resume_info[i].sig = target_signal_to_host (sig); - } - else - { - resume_info[i].sig = 0; - p = p + 1; - } - - if (p[0] == 0) - { - resume_info[i].thread = -1; - default_action = resume_info[i]; - - /* Note: we don't increment i here, we'll overwrite this entry - the next time through. */ - } - else if (p[0] == ':') - { - resume_info[i].thread = strtol (p + 1, &q, 16); - if (p == q) - goto err; - p = q; - if (p[0] != ';' && p[0] != 0) - goto err; - - i++; - } - } - - resume_info[i] = default_action; - - /* Still used in occasional places in the backend. */ - if (n == 1 && resume_info[0].thread != -1) - cont_thread = resume_info[0].thread; - else - cont_thread = -1; - set_desired_inferior (0); - - (*the_target->resume) (resume_info); - - free (resume_info); - - *signal = mywait (status, 1); - prepare_resume_reply (own_buf, *status, *signal); - return; - -err: - /* No other way to report an error... */ - strcpy (own_buf, ""); - free (resume_info); - return; -} - -/* Handle all of the extended 'v' packets. */ -void -handle_v_requests (char *own_buf, char *status, unsigned char *signal) -{ - if (strncmp (own_buf, "vCont;", 6) == 0) - { - handle_v_cont (own_buf, status, signal); - return; - } - - if (strncmp (own_buf, "vCont?", 6) == 0) - { - strcpy (own_buf, "vCont;c;C;s;S"); - return; - } - - /* Otherwise we didn't know what packet it was. Say we didn't - understand it. */ - own_buf[0] = 0; - return; -} - -void -handle_breakpoint_requests (char *own_buf, char *status, unsigned char *signal) -{ - /* Currently we only support software breakpoints */ - switch (own_buf[1]) { - case '0': /* software breakpoint, int3 based */ - own_buf[0] = '\0'; - break; - case '1': /* hardware breakpoint */ - default: - write_enn (own_buf); - break; - } -} - -void -myresume (int step, int sig) -{ - struct thread_resume resume_info[2]; - int n = 0; - - if (step || sig || cont_thread > 0) - { - resume_info[0].thread - = ((struct inferior_list_entry *) current_inferior)->id; - resume_info[0].step = step; - resume_info[0].sig = sig; - resume_info[0].leave_stopped = 0; - n++; - } - resume_info[n].thread = -1; - resume_info[n].step = 0; - resume_info[n].sig = 0; - resume_info[n].leave_stopped = (cont_thread > 0); - - (*the_target->resume) (resume_info); -} - -static int attached; - -static void -gdbserver_usage (void) -{ - error ("Usage:\tgdbserver COMM PROG [ARGS ...]\n" - "\tgdbserver COMM --attach PID\n" - "\tgdbserver COMM --file COREFILE\n" - "\n" - "COMM may either be a tty device (for serial debugging), or \n" - "HOST:PORT to listen for a TCP connection.\n"); -} - -extern control_c_pressed_flag; -#include <signal.h> - -void ctrl_c_handler(int signo) -{ - printf("Ctrl-C pressed: Quit from the attached gdb first\n"); - control_c_pressed_flag = 1; -} - -struct sigaction ctrl_c_sigaction = { .sa_handler = ctrl_c_handler }; -struct sigaction old_sigaction; - -int -main (int argc, char *argv[]) -{ - char ch, status, *own_buf, mem_buf[2000]; - int i = 0; - unsigned char signal; - unsigned int len; - CORE_ADDR mem_addr; - int bad_attach; - int pid; - char *arg_end; - - if (setjmp (toplevel)) - { - fprintf (stderr, "Exiting\n"); - exit (1); - } - - bad_attach = 0; - pid = 0; - attached = 0; - if (argc >= 3 && strcmp (argv[2], "--attach") == 0) - { - if (argc == 4 - && argv[3] != '\0' - && (pid = strtoul (argv[3], &arg_end, 10)) != 0 - && *arg_end == '\0') - { - ; - } - else - bad_attach = 1; - } - else if (argc >= 3 && strcmp (argv[2], "--file") == 0) - { - if (argc == 4 - && argv[3] != '\0') - { - if ((pid = open(argv[3], O_RDONLY)) <= 0) - bad_attach = 1; - else - isfile = 1; - } - else - bad_attach = 1; - } - - if (argc < 3 || bad_attach) - gdbserver_usage(); - - initialize_low (); - - own_buf = malloc (PBUFSIZ); - - if (pid == 0) - { - /* Wait till we are at first instruction in program. */ - signal = start_inferior (&argv[2], &status); - - /* We are now stopped at the first instruction of the target process */ - } - else - { - switch (attach_inferior (pid, &status, &signal)) - { - case -1: - error ("Attaching not supported on this target"); - break; - default: - attached = 1; - break; - } - } - - - while (1) - { - remote_open (argv[1]); - sigaction(SIGINT, &ctrl_c_sigaction, &old_sigaction); - - restart: - setjmp (toplevel); - while (getpkt (own_buf) > 0) - { - unsigned char sig; - i = 0; - ch = own_buf[i++]; - switch (ch) - { - case 'q': - handle_query (own_buf); - break; - case 'd': - remote_debug = !remote_debug; - break; - case 'D': - fprintf (stderr, "Detaching from inferior\n"); - detach_inferior (); - write_ok (own_buf); - putpkt (own_buf); - remote_close (); - - /* If we are attached, then we can exit. Otherwise, we need to - hang around doing nothing, until the child is gone. */ - if (!attached) - { - int status, ret; - - do { - ret = waitpid (signal_pid, &status, 0); - if (WIFEXITED (status) || WIFSIGNALED (status)) - break; - } while (ret != -1 || errno != ECHILD); - } - - exit (0); - - case '!': - if (attached == 0) - { - extended_protocol = 1; - prepare_resume_reply (own_buf, status, signal); - } - else - { - /* We can not use the extended protocol if we are - attached, because we can not restart the running - program. So return unrecognized. */ - own_buf[0] = '\0'; - } - break; - case '?': - prepare_resume_reply (own_buf, status, signal); - break; - case 'H': - switch (own_buf[1]) - { - case 'g': - general_thread = strtol (&own_buf[2], NULL, 16); - write_ok (own_buf); - set_desired_inferior (1); - break; - case 'c': - cont_thread = strtol (&own_buf[2], NULL, 16); - write_ok (own_buf); - break; - case 's': - step_thread = strtol (&own_buf[2], NULL, 16); - write_ok (own_buf); - break; - default: - /* Silently ignore it so that gdb can extend the protocol - without compatibility headaches. */ - own_buf[0] = '\0'; - break; - } - break; - case 'g': - set_desired_inferior (1); - registers_to_string (own_buf); - break; - case 'G': - set_desired_inferior (1); - registers_from_string (&own_buf[1]); - write_ok (own_buf); - break; - case 'm': - decode_m_packet (&own_buf[1], &mem_addr, &len); - if (read_inferior_memory (mem_addr, mem_buf, len) == 0) - convert_int_to_ascii (mem_buf, own_buf, len); - else - write_enn (own_buf); - break; - case 'M': - decode_M_packet (&own_buf[1], &mem_addr, &len, mem_buf); - if (write_inferior_memory (mem_addr, mem_buf, len) == 0) - write_ok (own_buf); - else - write_enn (own_buf); - break; - case 'C': - convert_ascii_to_int (own_buf + 1, &sig, 1); - if (target_signal_to_host_p (sig)) - signal = target_signal_to_host (sig); - else - signal = 0; - set_desired_inferior (0); - myresume (0, signal); - signal = mywait (&status, 1); - prepare_resume_reply (own_buf, status, signal); - break; - case 'S': - convert_ascii_to_int (own_buf + 1, &sig, 1); - if (target_signal_to_host_p (sig)) - signal = target_signal_to_host (sig); - else - signal = 0; - set_desired_inferior (0); - myresume (1, signal); - signal = mywait (&status, 1); - prepare_resume_reply (own_buf, status, signal); - break; - case 'c': - set_desired_inferior (0); - myresume (0, 0); - signal = mywait (&status, 1); - prepare_resume_reply (own_buf, status, signal); - break; - case 's': - set_desired_inferior (0); - myresume (1, 0); - signal = mywait (&status, 1); - prepare_resume_reply (own_buf, status, signal); - break; - case 'k': - fprintf (stderr, "Killing inferior\n"); - kill_inferior (); - /* When using the extended protocol, we start up a new - debugging session. The traditional protocol will - exit instead. */ - if (extended_protocol) - { - write_ok (own_buf); - fprintf (stderr, "GDBserver restarting\n"); - - /* Wait till we are at 1st instruction in prog. */ - signal = start_inferior (&argv[2], &status); - goto restart; - break; - } - else - { - exit (0); - break; - } - case 'T': - if (mythread_alive (strtol (&own_buf[1], NULL, 16))) - write_ok (own_buf); - else - write_enn (own_buf); - break; - case 'R': - /* Restarting the inferior is only supported in the - extended protocol. */ - if (extended_protocol) - { - kill_inferior (); - write_ok (own_buf); - fprintf (stderr, "GDBserver restarting\n"); - - /* Wait till we are at 1st instruction in prog. */ - signal = start_inferior (&argv[2], &status); - goto restart; - break; - } - else - { - /* It is a request we don't understand. Respond with an - empty packet so that gdb knows that we don't support this - request. */ - own_buf[0] = '\0'; - break; - } - case 'v': - /* Extended (long) request. */ - handle_v_requests (own_buf, &status, &signal); - break; - case 'Z': - handle_breakpoint_requests (own_buf, &status, &signal); - break; - default: - /* It is a request we don't understand. Respond with an - empty packet so that gdb knows that we don't support this - request. */ - own_buf[0] = '\0'; - break; - } - - putpkt (own_buf); - - if (status == 'W') - fprintf (stderr, - "\nChild exited with status %d\n", signal); - if (status == 'X') - fprintf (stderr, "\nChild terminated with signal = 0x%x\n", - signal); - if (status == 'W' || status == 'X') - { - if (extended_protocol) - { - fprintf (stderr, "Killing inferior\n"); - kill_inferior (); - write_ok (own_buf); - fprintf (stderr, "GDBserver restarting\n"); - - /* Wait till we are at 1st instruction in prog. */ - signal = start_inferior (&argv[2], &status); - goto restart; - break; - } - else - { - fprintf (stderr, "GDBserver exiting\n"); - exit (0); - } - } - } - - /* We come here when getpkt fails. - - For the extended remote protocol we exit (and this is the only - way we gracefully exit!). - - For the traditional remote protocol close the connection, - and re-open it at the top of the loop. */ - detach_inferior (); - remote_close (); - if (extended_protocol) - exit (0); - else - fprintf (stderr, "Remote side has terminated connection. " - "GDBserver will reopen the connection.\n"); - sigaction(SIGINT, &old_sigaction, NULL); - } -} |