91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/*
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* Copyright (C) yajin 2008 <yajinzhou@gmail.com >
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*
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* This file is part of the virtualmips distribution.
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* See LICENSE file for terms of the license.
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*
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*/
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/*
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A simple interface for GDB.
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Based on SimOS.
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*/
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#define _GNU_SOURCE
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#include <sys/signal.h>
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#include <sys/socket.h>
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#include <string.h>
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#include "vm.h"
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#include "mips.h"
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#include "utils.h"
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#include "debug.h"
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int forced_inline mips_debug (vm_instance_t * vm, int is_break)
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{
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Simdebug_result res;
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res = Simdebug_run (vm, is_break ? SIGTRAP : SIGUSR2);
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switch (res) {
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case SD_CONTINUE:
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vm->mipsy_break_nexti = MIPS_NOBREAK;
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vm->mipsy_debug_mode = 1;
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break;
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case SD_NEXTI_ANYCPU:
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vm->mipsy_break_nexti = MIPS_BREAKANYCPU;
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vm->mipsy_debug_mode = 1;
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break;
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default:
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vm->mipsy_break_nexti = res;
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vm->mipsy_debug_mode = 1;
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break;
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}
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return 0;
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}
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void vm_debug_init (vm_instance_t * vm)
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{
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struct sockaddr_in sockaddr;
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int tmp;
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if (vm->gdb_debug != 1)
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return;
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vm->mipsy_debug_mode = 1;
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vm->mipsy_break_nexti = -1;
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vm->gdb_interact_sock = -1;
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vm->gdb_debug_from_poll = 0;
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vm->gdb_listen_sock = socket (PF_INET, SOCK_STREAM, 0);
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if (vm->gdb_listen_sock < 0) {
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fprintf (stderr, "Can't open debug socket. Run without gdb debug\n");
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vm->gdb_debug = 0;
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return;
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}
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/* Allow rapid reuse of this port. */
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tmp = 1;
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if (setsockopt (vm->gdb_listen_sock, SOL_SOCKET, SO_REUSEADDR,
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(char *) &tmp, sizeof (tmp)) < 0) {
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printf ("simdebug setsockopt SO_REUSEADDR");
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/* Not fatal */
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}
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bzero ((char *) &sockaddr, sizeof (struct sockaddr_in));
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sockaddr.sin_family = PF_INET;
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sockaddr.sin_port = htons (vm->gdb_port);
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sockaddr.sin_addr.s_addr = INADDR_ANY;
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while (bind (vm->gdb_listen_sock, (struct sockaddr *) &sockaddr,
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sizeof (sockaddr)) || listen (vm->gdb_listen_sock, 1)) {
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vm->gdb_port++;
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sockaddr.sin_port = htons (vm->gdb_port);
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}
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vm->breakpoint_head = 0;
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vm->breakpoint_tail = 0;
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}
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