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/*
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* gdb server stub
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*
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* Copyright (c) 2003-2005 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h" |
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#ifdef CONFIG_USER_ONLY
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include "qemu.h" |
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#else
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#include "qemu-common.h" |
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#include "qemu-char.h" |
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#include "sysemu.h" |
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#include "gdbstub.h" |
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#endif
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#include "qemu_socket.h" |
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#ifdef _WIN32
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/* XXX: these constants may be independent of the host ones even for Unix */
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#ifndef SIGTRAP
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#define SIGTRAP 5 |
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#endif
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#ifndef SIGINT
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#define SIGINT 2 |
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#endif
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#else
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#include <signal.h> |
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#endif
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//#define DEBUG_GDB
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enum RSState {
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RS_IDLE, |
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RS_GETLINE, |
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RS_CHKSUM1, |
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RS_CHKSUM2, |
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RS_SYSCALL, |
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}; |
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typedef struct GDBState { |
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CPUState *env; /* current CPU */
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enum RSState state; /* parsing state */ |
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char line_buf[4096]; |
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int line_buf_index;
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int line_csum;
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uint8_t last_packet[4100];
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int last_packet_len;
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int signal;
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#ifdef CONFIG_USER_ONLY
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int fd;
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int running_state;
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#else
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CharDriverState *chr; |
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#endif
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} GDBState; |
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/* By default use no IRQs and no timers while single stepping so as to
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* make single stepping like an ICE HW step.
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*/
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static int sstep_flags = SSTEP_ENABLE|SSTEP_NOIRQ|SSTEP_NOTIMER; |
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#ifdef CONFIG_USER_ONLY
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/* XXX: This is not thread safe. Do we care? */
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static int gdbserver_fd = -1; |
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/* XXX: remove this hack. */
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static GDBState gdbserver_state;
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static int get_char(GDBState *s) |
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{ |
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uint8_t ch; |
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int ret;
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for(;;) {
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ret = recv(s->fd, &ch, 1, 0); |
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if (ret < 0) { |
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if (errno == ECONNRESET)
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s->fd = -1;
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if (errno != EINTR && errno != EAGAIN)
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return -1; |
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} else if (ret == 0) { |
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close(s->fd); |
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s->fd = -1;
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return -1; |
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} else {
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break;
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} |
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} |
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return ch;
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} |
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#endif
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/* GDB stub state for use by semihosting syscalls. */
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static GDBState *gdb_syscall_state;
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static gdb_syscall_complete_cb gdb_current_syscall_cb;
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enum {
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GDB_SYS_UNKNOWN, |
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GDB_SYS_ENABLED, |
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GDB_SYS_DISABLED, |
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} gdb_syscall_mode; |
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/* If gdb is connected when the first semihosting syscall occurs then use
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remote gdb syscalls. Otherwise use native file IO. */
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int use_gdb_syscalls(void) |
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{ |
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if (gdb_syscall_mode == GDB_SYS_UNKNOWN) {
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gdb_syscall_mode = (gdb_syscall_state ? GDB_SYS_ENABLED |
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: GDB_SYS_DISABLED); |
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} |
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return gdb_syscall_mode == GDB_SYS_ENABLED;
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} |
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/* Resume execution. */
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static inline void gdb_continue(GDBState *s) |
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{ |
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#ifdef CONFIG_USER_ONLY
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s->running_state = 1;
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#else
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vm_start(); |
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#endif
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} |
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static void put_buffer(GDBState *s, const uint8_t *buf, int len) |
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{ |
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#ifdef CONFIG_USER_ONLY
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int ret;
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while (len > 0) { |
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ret = send(s->fd, buf, len, 0);
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if (ret < 0) { |
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if (errno != EINTR && errno != EAGAIN)
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return;
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} else {
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buf += ret; |
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len -= ret; |
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} |
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} |
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#else
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qemu_chr_write(s->chr, buf, len); |
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#endif
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} |
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static inline int fromhex(int v) |
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{ |
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if (v >= '0' && v <= '9') |
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return v - '0'; |
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else if (v >= 'A' && v <= 'F') |
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return v - 'A' + 10; |
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else if (v >= 'a' && v <= 'f') |
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return v - 'a' + 10; |
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else
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return 0; |
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} |
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static inline int tohex(int v) |
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{ |
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if (v < 10) |
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return v + '0'; |
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else
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return v - 10 + 'a'; |
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} |
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static void memtohex(char *buf, const uint8_t *mem, int len) |
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{ |
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int i, c;
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char *q;
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q = buf; |
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for(i = 0; i < len; i++) { |
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c = mem[i]; |
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*q++ = tohex(c >> 4);
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*q++ = tohex(c & 0xf);
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} |
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*q = '\0';
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} |
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static void hextomem(uint8_t *mem, const char *buf, int len) |
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{ |
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int i;
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for(i = 0; i < len; i++) { |
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mem[i] = (fromhex(buf[0]) << 4) | fromhex(buf[1]); |
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buf += 2;
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} |
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} |
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/* return -1 if error, 0 if OK */
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static int put_packet(GDBState *s, char *buf) |
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{ |
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int len, csum, i;
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uint8_t *p; |
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#ifdef DEBUG_GDB
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printf("reply='%s'\n", buf);
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#endif
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for(;;) {
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p = s->last_packet; |
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*(p++) = '$';
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len = strlen(buf); |
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memcpy(p, buf, len); |
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p += len; |
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csum = 0;
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for(i = 0; i < len; i++) { |
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csum += buf[i]; |
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} |
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*(p++) = '#';
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*(p++) = tohex((csum >> 4) & 0xf); |
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*(p++) = tohex((csum) & 0xf);
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s->last_packet_len = p - s->last_packet; |
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put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
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#ifdef CONFIG_USER_ONLY
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i = get_char(s); |
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if (i < 0) |
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return -1; |
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if (i == '+') |
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break;
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#else
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break;
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#endif
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} |
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return 0; |
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} |
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#if defined(TARGET_I386)
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#ifdef TARGET_X86_64
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static const uint8_t gdb_x86_64_regs[16] = { |
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R_EAX, R_EBX, R_ECX, R_EDX, R_ESI, R_EDI, R_EBP, R_ESP, |
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8, 9, 10, 11, 12, 13, 14, 15, |
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}; |
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#endif
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static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
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{ |
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int i, fpus, nb_regs;
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uint8_t *p; |
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p = mem_buf; |
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#ifdef TARGET_X86_64
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if (env->hflags & HF_CS64_MASK) {
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nb_regs = 16;
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for(i = 0; i < 16; i++) { |
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*(uint64_t *)p = tswap64(env->regs[gdb_x86_64_regs[i]]); |
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p += 8;
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} |
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*(uint64_t *)p = tswap64(env->eip); |
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p += 8;
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} else
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#endif
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{ |
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nb_regs = 8;
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for(i = 0; i < 8; i++) { |
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*(uint32_t *)p = tswap32(env->regs[i]); |
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p += 4;
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} |
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*(uint32_t *)p = tswap32(env->eip); |
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p += 4;
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} |
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*(uint32_t *)p = tswap32(env->eflags); |
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p += 4;
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*(uint32_t *)p = tswap32(env->segs[R_CS].selector); |
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p += 4;
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*(uint32_t *)p = tswap32(env->segs[R_SS].selector); |
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p += 4;
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*(uint32_t *)p = tswap32(env->segs[R_DS].selector); |
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p += 4;
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*(uint32_t *)p = tswap32(env->segs[R_ES].selector); |
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p += 4;
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*(uint32_t *)p = tswap32(env->segs[R_FS].selector); |
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p += 4;
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*(uint32_t *)p = tswap32(env->segs[R_GS].selector); |
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p += 4;
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for(i = 0; i < 8; i++) { |
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/* XXX: convert floats */
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#ifdef USE_X86LDOUBLE
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memcpy(p, &env->fpregs[i], 10);
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#else
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memset(p, 0, 10); |
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#endif
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p += 10;
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} |
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*(uint32_t *)p = tswap32(env->fpuc); /* fctrl */
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p += 4;
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fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; |
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*(uint32_t *)p = tswap32(fpus); /* fstat */
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p += 4;
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*(uint32_t *)p = 0; /* ftag */ |
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p += 4;
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*(uint32_t *)p = 0; /* fiseg */ |
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p += 4;
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*(uint32_t *)p = 0; /* fioff */ |
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p += 4;
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*(uint32_t *)p = 0; /* foseg */ |
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p += 4;
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*(uint32_t *)p = 0; /* fooff */ |
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p += 4;
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*(uint32_t *)p = 0; /* fop */ |
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p += 4;
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for(i = 0; i < nb_regs; i++) { |
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*(uint64_t *)p = tswap64(env->xmm_regs[i].XMM_Q(0));
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p += 8;
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*(uint64_t *)p = tswap64(env->xmm_regs[i].XMM_Q(1));
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p += 8;
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} |
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*(uint32_t *)p = tswap32(env->mxcsr); |
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p += 4;
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return p - mem_buf;
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} |
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static inline void cpu_gdb_load_seg(CPUState *env, const uint8_t **pp, |
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int sreg)
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{ |
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const uint8_t *p;
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uint32_t sel; |
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p = *pp; |
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sel = tswap32(*(uint32_t *)p); |
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p += 4;
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if (sel != env->segs[sreg].selector) {
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#if defined(CONFIG_USER_ONLY)
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cpu_x86_load_seg(env, sreg, sel); |
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#else
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/* XXX: do it with a debug function which does not raise an
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exception */
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#endif
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} |
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*pp = p; |
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} |
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static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
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{ |
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const uint8_t *p = mem_buf;
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int i, nb_regs;
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uint16_t fpus; |
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#ifdef TARGET_X86_64
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if (env->hflags & HF_CS64_MASK) {
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nb_regs = 16;
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for(i = 0; i < 16; i++) { |
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env->regs[gdb_x86_64_regs[i]] = tswap64(*(uint64_t *)p); |
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p += 8;
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} |
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env->eip = tswap64(*(uint64_t *)p); |
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p += 8;
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} else
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#endif
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{ |
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nb_regs = 8;
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for(i = 0; i < 8; i++) { |
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env->regs[i] = tswap32(*(uint32_t *)p); |
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p += 4;
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} |
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env->eip = tswap32(*(uint32_t *)p); |
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p += 4;
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} |
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env->eflags = tswap32(*(uint32_t *)p); |
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p += 4;
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cpu_gdb_load_seg(env, &p, R_CS); |
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cpu_gdb_load_seg(env, &p, R_SS); |
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cpu_gdb_load_seg(env, &p, R_DS); |
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cpu_gdb_load_seg(env, &p, R_ES); |
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cpu_gdb_load_seg(env, &p, R_FS); |
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cpu_gdb_load_seg(env, &p, R_GS); |
387 |
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/* FPU state */
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for(i = 0; i < 8; i++) { |
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/* XXX: convert floats */
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#ifdef USE_X86LDOUBLE
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memcpy(&env->fpregs[i], p, 10);
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#endif
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p += 10;
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} |
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env->fpuc = tswap32(*(uint32_t *)p); /* fctrl */
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p += 4;
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fpus = tswap32(*(uint32_t *)p); |
399 |
p += 4;
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env->fpstt = (fpus >> 11) & 7; |
401 |
env->fpus = fpus & ~0x3800;
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p += 4 * 6; |
403 |
|
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if (size >= ((p - mem_buf) + 16 * nb_regs + 4)) { |
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/* SSE state */
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for(i = 0; i < nb_regs; i++) { |
407 |
env->xmm_regs[i].XMM_Q(0) = tswap64(*(uint64_t *)p);
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p += 8;
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env->xmm_regs[i].XMM_Q(1) = tswap64(*(uint64_t *)p);
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p += 8;
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} |
412 |
env->mxcsr = tswap32(*(uint32_t *)p); |
413 |
p += 4;
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} |
415 |
} |
416 |
|
417 |
#elif defined (TARGET_PPC)
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418 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
419 |
{ |
420 |
uint32_t *registers = (uint32_t *)mem_buf, tmp; |
421 |
int i;
|
422 |
|
423 |
/* fill in gprs */
|
424 |
for(i = 0; i < 32; i++) { |
425 |
registers[i] = tswapl(env->gpr[i]); |
426 |
} |
427 |
/* fill in fprs */
|
428 |
for (i = 0; i < 32; i++) { |
429 |
registers[(i * 2) + 32] = tswapl(*((uint32_t *)&env->fpr[i])); |
430 |
registers[(i * 2) + 33] = tswapl(*((uint32_t *)&env->fpr[i] + 1)); |
431 |
} |
432 |
/* nip, msr, ccr, lnk, ctr, xer, mq */
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registers[96] = tswapl(env->nip);
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434 |
registers[97] = tswapl(env->msr);
|
435 |
tmp = 0;
|
436 |
for (i = 0; i < 8; i++) |
437 |
tmp |= env->crf[i] << (32 - ((i + 1) * 4)); |
438 |
registers[98] = tswapl(tmp);
|
439 |
registers[99] = tswapl(env->lr);
|
440 |
registers[100] = tswapl(env->ctr);
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441 |
registers[101] = tswapl(ppc_load_xer(env));
|
442 |
registers[102] = 0; |
443 |
|
444 |
return 103 * 4; |
445 |
} |
446 |
|
447 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
448 |
{ |
449 |
uint32_t *registers = (uint32_t *)mem_buf; |
450 |
int i;
|
451 |
|
452 |
/* fill in gprs */
|
453 |
for (i = 0; i < 32; i++) { |
454 |
env->gpr[i] = tswapl(registers[i]); |
455 |
} |
456 |
/* fill in fprs */
|
457 |
for (i = 0; i < 32; i++) { |
458 |
*((uint32_t *)&env->fpr[i]) = tswapl(registers[(i * 2) + 32]); |
459 |
*((uint32_t *)&env->fpr[i] + 1) = tswapl(registers[(i * 2) + 33]); |
460 |
} |
461 |
/* nip, msr, ccr, lnk, ctr, xer, mq */
|
462 |
env->nip = tswapl(registers[96]);
|
463 |
ppc_store_msr(env, tswapl(registers[97]));
|
464 |
registers[98] = tswapl(registers[98]); |
465 |
for (i = 0; i < 8; i++) |
466 |
env->crf[i] = (registers[98] >> (32 - ((i + 1) * 4))) & 0xF; |
467 |
env->lr = tswapl(registers[99]);
|
468 |
env->ctr = tswapl(registers[100]);
|
469 |
ppc_store_xer(env, tswapl(registers[101]));
|
470 |
} |
471 |
#elif defined (TARGET_SPARC)
|
472 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
473 |
{ |
474 |
target_ulong *registers = (target_ulong *)mem_buf; |
475 |
int i;
|
476 |
|
477 |
/* fill in g0..g7 */
|
478 |
for(i = 0; i < 8; i++) { |
479 |
registers[i] = tswapl(env->gregs[i]); |
480 |
} |
481 |
/* fill in register window */
|
482 |
for(i = 0; i < 24; i++) { |
483 |
registers[i + 8] = tswapl(env->regwptr[i]);
|
484 |
} |
485 |
#ifndef TARGET_SPARC64
|
486 |
/* fill in fprs */
|
487 |
for (i = 0; i < 32; i++) { |
488 |
registers[i + 32] = tswapl(*((uint32_t *)&env->fpr[i]));
|
489 |
} |
490 |
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
|
491 |
registers[64] = tswapl(env->y);
|
492 |
{ |
493 |
target_ulong tmp; |
494 |
|
495 |
tmp = GET_PSR(env); |
496 |
registers[65] = tswapl(tmp);
|
497 |
} |
498 |
registers[66] = tswapl(env->wim);
|
499 |
registers[67] = tswapl(env->tbr);
|
500 |
registers[68] = tswapl(env->pc);
|
501 |
registers[69] = tswapl(env->npc);
|
502 |
registers[70] = tswapl(env->fsr);
|
503 |
registers[71] = 0; /* csr */ |
504 |
registers[72] = 0; |
505 |
return 73 * sizeof(target_ulong); |
506 |
#else
|
507 |
/* fill in fprs */
|
508 |
for (i = 0; i < 64; i += 2) { |
509 |
uint64_t tmp; |
510 |
|
511 |
tmp = ((uint64_t)*(uint32_t *)&env->fpr[i]) << 32;
|
512 |
tmp |= *(uint32_t *)&env->fpr[i + 1];
|
513 |
registers[i / 2 + 32] = tswap64(tmp); |
514 |
} |
515 |
registers[64] = tswapl(env->pc);
|
516 |
registers[65] = tswapl(env->npc);
|
517 |
registers[66] = tswapl(((uint64_t)GET_CCR(env) << 32) | |
518 |
((env->asi & 0xff) << 24) | |
519 |
((env->pstate & 0xfff) << 8) | |
520 |
GET_CWP64(env)); |
521 |
registers[67] = tswapl(env->fsr);
|
522 |
registers[68] = tswapl(env->fprs);
|
523 |
registers[69] = tswapl(env->y);
|
524 |
return 70 * sizeof(target_ulong); |
525 |
#endif
|
526 |
} |
527 |
|
528 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
529 |
{ |
530 |
target_ulong *registers = (target_ulong *)mem_buf; |
531 |
int i;
|
532 |
|
533 |
/* fill in g0..g7 */
|
534 |
for(i = 0; i < 7; i++) { |
535 |
env->gregs[i] = tswapl(registers[i]); |
536 |
} |
537 |
/* fill in register window */
|
538 |
for(i = 0; i < 24; i++) { |
539 |
env->regwptr[i] = tswapl(registers[i + 8]);
|
540 |
} |
541 |
#ifndef TARGET_SPARC64
|
542 |
/* fill in fprs */
|
543 |
for (i = 0; i < 32; i++) { |
544 |
*((uint32_t *)&env->fpr[i]) = tswapl(registers[i + 32]);
|
545 |
} |
546 |
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
|
547 |
env->y = tswapl(registers[64]);
|
548 |
PUT_PSR(env, tswapl(registers[65]));
|
549 |
env->wim = tswapl(registers[66]);
|
550 |
env->tbr = tswapl(registers[67]);
|
551 |
env->pc = tswapl(registers[68]);
|
552 |
env->npc = tswapl(registers[69]);
|
553 |
env->fsr = tswapl(registers[70]);
|
554 |
#else
|
555 |
for (i = 0; i < 64; i += 2) { |
556 |
uint64_t tmp; |
557 |
|
558 |
tmp = tswap64(registers[i / 2 + 32]); |
559 |
*((uint32_t *)&env->fpr[i]) = tmp >> 32;
|
560 |
*((uint32_t *)&env->fpr[i + 1]) = tmp & 0xffffffff; |
561 |
} |
562 |
env->pc = tswapl(registers[64]);
|
563 |
env->npc = tswapl(registers[65]);
|
564 |
{ |
565 |
uint64_t tmp = tswapl(registers[66]);
|
566 |
|
567 |
PUT_CCR(env, tmp >> 32);
|
568 |
env->asi = (tmp >> 24) & 0xff; |
569 |
env->pstate = (tmp >> 8) & 0xfff; |
570 |
PUT_CWP64(env, tmp & 0xff);
|
571 |
} |
572 |
env->fsr = tswapl(registers[67]);
|
573 |
env->fprs = tswapl(registers[68]);
|
574 |
env->y = tswapl(registers[69]);
|
575 |
#endif
|
576 |
} |
577 |
#elif defined (TARGET_ARM)
|
578 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
579 |
{ |
580 |
int i;
|
581 |
uint8_t *ptr; |
582 |
|
583 |
ptr = mem_buf; |
584 |
/* 16 core integer registers (4 bytes each). */
|
585 |
for (i = 0; i < 16; i++) |
586 |
{ |
587 |
*(uint32_t *)ptr = tswapl(env->regs[i]); |
588 |
ptr += 4;
|
589 |
} |
590 |
/* 8 FPA registers (12 bytes each), FPS (4 bytes).
|
591 |
Not yet implemented. */
|
592 |
memset (ptr, 0, 8 * 12 + 4); |
593 |
ptr += 8 * 12 + 4; |
594 |
/* CPSR (4 bytes). */
|
595 |
*(uint32_t *)ptr = tswapl (cpsr_read(env)); |
596 |
ptr += 4;
|
597 |
|
598 |
return ptr - mem_buf;
|
599 |
} |
600 |
|
601 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
602 |
{ |
603 |
int i;
|
604 |
uint8_t *ptr; |
605 |
|
606 |
ptr = mem_buf; |
607 |
/* Core integer registers. */
|
608 |
for (i = 0; i < 16; i++) |
609 |
{ |
610 |
env->regs[i] = tswapl(*(uint32_t *)ptr); |
611 |
ptr += 4;
|
612 |
} |
613 |
/* Ignore FPA regs and scr. */
|
614 |
ptr += 8 * 12 + 4; |
615 |
cpsr_write (env, tswapl(*(uint32_t *)ptr), 0xffffffff);
|
616 |
} |
617 |
#elif defined (TARGET_M68K)
|
618 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
619 |
{ |
620 |
int i;
|
621 |
uint8_t *ptr; |
622 |
CPU_DoubleU u; |
623 |
|
624 |
ptr = mem_buf; |
625 |
/* D0-D7 */
|
626 |
for (i = 0; i < 8; i++) { |
627 |
*(uint32_t *)ptr = tswapl(env->dregs[i]); |
628 |
ptr += 4;
|
629 |
} |
630 |
/* A0-A7 */
|
631 |
for (i = 0; i < 8; i++) { |
632 |
*(uint32_t *)ptr = tswapl(env->aregs[i]); |
633 |
ptr += 4;
|
634 |
} |
635 |
*(uint32_t *)ptr = tswapl(env->sr); |
636 |
ptr += 4;
|
637 |
*(uint32_t *)ptr = tswapl(env->pc); |
638 |
ptr += 4;
|
639 |
/* F0-F7. The 68881/68040 have 12-bit extended precision registers.
|
640 |
ColdFire has 8-bit double precision registers. */
|
641 |
for (i = 0; i < 8; i++) { |
642 |
u.d = env->fregs[i]; |
643 |
*(uint32_t *)ptr = tswap32(u.l.upper); |
644 |
*(uint32_t *)ptr = tswap32(u.l.lower); |
645 |
} |
646 |
/* FP control regs (not implemented). */
|
647 |
memset (ptr, 0, 3 * 4); |
648 |
ptr += 3 * 4; |
649 |
|
650 |
return ptr - mem_buf;
|
651 |
} |
652 |
|
653 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
654 |
{ |
655 |
int i;
|
656 |
uint8_t *ptr; |
657 |
CPU_DoubleU u; |
658 |
|
659 |
ptr = mem_buf; |
660 |
/* D0-D7 */
|
661 |
for (i = 0; i < 8; i++) { |
662 |
env->dregs[i] = tswapl(*(uint32_t *)ptr); |
663 |
ptr += 4;
|
664 |
} |
665 |
/* A0-A7 */
|
666 |
for (i = 0; i < 8; i++) { |
667 |
env->aregs[i] = tswapl(*(uint32_t *)ptr); |
668 |
ptr += 4;
|
669 |
} |
670 |
env->sr = tswapl(*(uint32_t *)ptr); |
671 |
ptr += 4;
|
672 |
env->pc = tswapl(*(uint32_t *)ptr); |
673 |
ptr += 4;
|
674 |
/* F0-F7. The 68881/68040 have 12-bit extended precision registers.
|
675 |
ColdFire has 8-bit double precision registers. */
|
676 |
for (i = 0; i < 8; i++) { |
677 |
u.l.upper = tswap32(*(uint32_t *)ptr); |
678 |
u.l.lower = tswap32(*(uint32_t *)ptr); |
679 |
env->fregs[i] = u.d; |
680 |
} |
681 |
/* FP control regs (not implemented). */
|
682 |
ptr += 3 * 4; |
683 |
} |
684 |
#elif defined (TARGET_MIPS)
|
685 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
686 |
{ |
687 |
int i;
|
688 |
uint8_t *ptr; |
689 |
|
690 |
ptr = mem_buf; |
691 |
for (i = 0; i < 32; i++) |
692 |
{ |
693 |
*(target_ulong *)ptr = tswapl(env->gpr[env->current_tc][i]); |
694 |
ptr += sizeof(target_ulong);
|
695 |
} |
696 |
|
697 |
*(target_ulong *)ptr = (int32_t)tswap32(env->CP0_Status); |
698 |
ptr += sizeof(target_ulong);
|
699 |
|
700 |
*(target_ulong *)ptr = tswapl(env->LO[env->current_tc][0]);
|
701 |
ptr += sizeof(target_ulong);
|
702 |
|
703 |
*(target_ulong *)ptr = tswapl(env->HI[env->current_tc][0]);
|
704 |
ptr += sizeof(target_ulong);
|
705 |
|
706 |
*(target_ulong *)ptr = tswapl(env->CP0_BadVAddr); |
707 |
ptr += sizeof(target_ulong);
|
708 |
|
709 |
*(target_ulong *)ptr = (int32_t)tswap32(env->CP0_Cause); |
710 |
ptr += sizeof(target_ulong);
|
711 |
|
712 |
*(target_ulong *)ptr = tswapl(env->PC[env->current_tc]); |
713 |
ptr += sizeof(target_ulong);
|
714 |
|
715 |
if (env->CP0_Config1 & (1 << CP0C1_FP)) |
716 |
{ |
717 |
for (i = 0; i < 32; i++) |
718 |
{ |
719 |
if (env->CP0_Status & (1 << CP0St_FR)) |
720 |
*(target_ulong *)ptr = tswapl(env->fpu->fpr[i].d); |
721 |
else
|
722 |
*(target_ulong *)ptr = tswap32(env->fpu->fpr[i].w[FP_ENDIAN_IDX]); |
723 |
ptr += sizeof(target_ulong);
|
724 |
} |
725 |
|
726 |
*(target_ulong *)ptr = (int32_t)tswap32(env->fpu->fcr31); |
727 |
ptr += sizeof(target_ulong);
|
728 |
|
729 |
*(target_ulong *)ptr = (int32_t)tswap32(env->fpu->fcr0); |
730 |
ptr += sizeof(target_ulong);
|
731 |
} |
732 |
|
733 |
/* "fp", pseudo frame pointer. Not yet implemented in gdb. */
|
734 |
*(target_ulong *)ptr = 0;
|
735 |
ptr += sizeof(target_ulong);
|
736 |
|
737 |
/* Registers for embedded use, we just pad them. */
|
738 |
for (i = 0; i < 16; i++) |
739 |
{ |
740 |
*(target_ulong *)ptr = 0;
|
741 |
ptr += sizeof(target_ulong);
|
742 |
} |
743 |
|
744 |
/* Processor ID. */
|
745 |
*(target_ulong *)ptr = (int32_t)tswap32(env->CP0_PRid); |
746 |
ptr += sizeof(target_ulong);
|
747 |
|
748 |
return ptr - mem_buf;
|
749 |
} |
750 |
|
751 |
/* convert MIPS rounding mode in FCR31 to IEEE library */
|
752 |
static unsigned int ieee_rm[] = |
753 |
{ |
754 |
float_round_nearest_even, |
755 |
float_round_to_zero, |
756 |
float_round_up, |
757 |
float_round_down |
758 |
}; |
759 |
#define RESTORE_ROUNDING_MODE \
|
760 |
set_float_rounding_mode(ieee_rm[env->fpu->fcr31 & 3], &env->fpu->fp_status)
|
761 |
|
762 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
763 |
{ |
764 |
int i;
|
765 |
uint8_t *ptr; |
766 |
|
767 |
ptr = mem_buf; |
768 |
for (i = 0; i < 32; i++) |
769 |
{ |
770 |
env->gpr[env->current_tc][i] = tswapl(*(target_ulong *)ptr); |
771 |
ptr += sizeof(target_ulong);
|
772 |
} |
773 |
|
774 |
env->CP0_Status = tswapl(*(target_ulong *)ptr); |
775 |
ptr += sizeof(target_ulong);
|
776 |
|
777 |
env->LO[env->current_tc][0] = tswapl(*(target_ulong *)ptr);
|
778 |
ptr += sizeof(target_ulong);
|
779 |
|
780 |
env->HI[env->current_tc][0] = tswapl(*(target_ulong *)ptr);
|
781 |
ptr += sizeof(target_ulong);
|
782 |
|
783 |
env->CP0_BadVAddr = tswapl(*(target_ulong *)ptr); |
784 |
ptr += sizeof(target_ulong);
|
785 |
|
786 |
env->CP0_Cause = tswapl(*(target_ulong *)ptr); |
787 |
ptr += sizeof(target_ulong);
|
788 |
|
789 |
env->PC[env->current_tc] = tswapl(*(target_ulong *)ptr); |
790 |
ptr += sizeof(target_ulong);
|
791 |
|
792 |
if (env->CP0_Config1 & (1 << CP0C1_FP)) |
793 |
{ |
794 |
for (i = 0; i < 32; i++) |
795 |
{ |
796 |
if (env->CP0_Status & (1 << CP0St_FR)) |
797 |
env->fpu->fpr[i].d = tswapl(*(target_ulong *)ptr); |
798 |
else
|
799 |
env->fpu->fpr[i].w[FP_ENDIAN_IDX] = tswapl(*(target_ulong *)ptr); |
800 |
ptr += sizeof(target_ulong);
|
801 |
} |
802 |
|
803 |
env->fpu->fcr31 = tswapl(*(target_ulong *)ptr) & 0xFF83FFFF;
|
804 |
ptr += sizeof(target_ulong);
|
805 |
|
806 |
/* The remaining registers are assumed to be read-only. */
|
807 |
|
808 |
/* set rounding mode */
|
809 |
RESTORE_ROUNDING_MODE; |
810 |
|
811 |
#ifndef CONFIG_SOFTFLOAT
|
812 |
/* no floating point exception for native float */
|
813 |
SET_FP_ENABLE(env->fcr31, 0);
|
814 |
#endif
|
815 |
} |
816 |
} |
817 |
#elif defined (TARGET_SH4)
|
818 |
|
819 |
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
|
820 |
|
821 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
822 |
{ |
823 |
uint32_t *ptr = (uint32_t *)mem_buf; |
824 |
int i;
|
825 |
|
826 |
#define SAVE(x) *ptr++=tswapl(x)
|
827 |
if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
|
828 |
for (i = 0; i < 8; i++) SAVE(env->gregs[i + 16]); |
829 |
} else {
|
830 |
for (i = 0; i < 8; i++) SAVE(env->gregs[i]); |
831 |
} |
832 |
for (i = 8; i < 16; i++) SAVE(env->gregs[i]); |
833 |
SAVE (env->pc); |
834 |
SAVE (env->pr); |
835 |
SAVE (env->gbr); |
836 |
SAVE (env->vbr); |
837 |
SAVE (env->mach); |
838 |
SAVE (env->macl); |
839 |
SAVE (env->sr); |
840 |
SAVE (env->fpul); |
841 |
SAVE (env->fpscr); |
842 |
for (i = 0; i < 16; i++) |
843 |
SAVE(env->fregs[i + ((env->fpscr & FPSCR_FR) ? 16 : 0)]); |
844 |
SAVE (env->ssr); |
845 |
SAVE (env->spc); |
846 |
for (i = 0; i < 8; i++) SAVE(env->gregs[i]); |
847 |
for (i = 0; i < 8; i++) SAVE(env->gregs[i + 16]); |
848 |
return ((uint8_t *)ptr - mem_buf);
|
849 |
} |
850 |
|
851 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
852 |
{ |
853 |
uint32_t *ptr = (uint32_t *)mem_buf; |
854 |
int i;
|
855 |
|
856 |
#define LOAD(x) (x)=*ptr++;
|
857 |
if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
|
858 |
for (i = 0; i < 8; i++) LOAD(env->gregs[i + 16]); |
859 |
} else {
|
860 |
for (i = 0; i < 8; i++) LOAD(env->gregs[i]); |
861 |
} |
862 |
for (i = 8; i < 16; i++) LOAD(env->gregs[i]); |
863 |
LOAD (env->pc); |
864 |
LOAD (env->pr); |
865 |
LOAD (env->gbr); |
866 |
LOAD (env->vbr); |
867 |
LOAD (env->mach); |
868 |
LOAD (env->macl); |
869 |
LOAD (env->sr); |
870 |
LOAD (env->fpul); |
871 |
LOAD (env->fpscr); |
872 |
for (i = 0; i < 16; i++) |
873 |
LOAD(env->fregs[i + ((env->fpscr & FPSCR_FR) ? 16 : 0)]); |
874 |
LOAD (env->ssr); |
875 |
LOAD (env->spc); |
876 |
for (i = 0; i < 8; i++) LOAD(env->gregs[i]); |
877 |
for (i = 0; i < 8; i++) LOAD(env->gregs[i + 16]); |
878 |
} |
879 |
#elif defined (TARGET_CRIS)
|
880 |
|
881 |
static int cris_save_32 (unsigned char *d, uint32_t value) |
882 |
{ |
883 |
*d++ = (value); |
884 |
*d++ = (value >>= 8);
|
885 |
*d++ = (value >>= 8);
|
886 |
*d++ = (value >>= 8);
|
887 |
return 4; |
888 |
} |
889 |
static int cris_save_16 (unsigned char *d, uint32_t value) |
890 |
{ |
891 |
*d++ = (value); |
892 |
*d++ = (value >>= 8);
|
893 |
return 2; |
894 |
} |
895 |
static int cris_save_8 (unsigned char *d, uint32_t value) |
896 |
{ |
897 |
*d++ = (value); |
898 |
return 1; |
899 |
} |
900 |
|
901 |
/* FIXME: this will bug on archs not supporting unaligned word accesses. */
|
902 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
903 |
{ |
904 |
uint8_t *ptr = mem_buf; |
905 |
uint8_t srs; |
906 |
int i;
|
907 |
|
908 |
for (i = 0; i < 16; i++) |
909 |
ptr += cris_save_32 (ptr, env->regs[i]); |
910 |
|
911 |
srs = env->pregs[PR_SRS]; |
912 |
|
913 |
ptr += cris_save_8 (ptr, env->pregs[0]);
|
914 |
ptr += cris_save_8 (ptr, env->pregs[1]);
|
915 |
ptr += cris_save_32 (ptr, env->pregs[2]);
|
916 |
ptr += cris_save_8 (ptr, srs); |
917 |
ptr += cris_save_16 (ptr, env->pregs[4]);
|
918 |
|
919 |
for (i = 5; i < 16; i++) |
920 |
ptr += cris_save_32 (ptr, env->pregs[i]); |
921 |
|
922 |
ptr += cris_save_32 (ptr, env->pc); |
923 |
|
924 |
for (i = 0; i < 16; i++) |
925 |
ptr += cris_save_32 (ptr, env->sregs[srs][i]); |
926 |
|
927 |
return ((uint8_t *)ptr - mem_buf);
|
928 |
} |
929 |
|
930 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
931 |
{ |
932 |
uint32_t *ptr = (uint32_t *)mem_buf; |
933 |
int i;
|
934 |
|
935 |
#define LOAD(x) (x)=*ptr++;
|
936 |
for (i = 0; i < 16; i++) LOAD(env->regs[i]); |
937 |
LOAD (env->pc); |
938 |
} |
939 |
#else
|
940 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
941 |
{ |
942 |
return 0; |
943 |
} |
944 |
|
945 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
946 |
{ |
947 |
} |
948 |
|
949 |
#endif
|
950 |
|
951 |
static int gdb_handle_packet(GDBState *s, CPUState *env, const char *line_buf) |
952 |
{ |
953 |
const char *p; |
954 |
int ch, reg_size, type;
|
955 |
char buf[4096]; |
956 |
uint8_t mem_buf[4096];
|
957 |
uint32_t *registers; |
958 |
target_ulong addr, len; |
959 |
|
960 |
#ifdef DEBUG_GDB
|
961 |
printf("command='%s'\n", line_buf);
|
962 |
#endif
|
963 |
p = line_buf; |
964 |
ch = *p++; |
965 |
switch(ch) {
|
966 |
case '?': |
967 |
/* TODO: Make this return the correct value for user-mode. */
|
968 |
snprintf(buf, sizeof(buf), "S%02x", SIGTRAP); |
969 |
put_packet(s, buf); |
970 |
/* Remove all the breakpoints when this query is issued,
|
971 |
* because gdb is doing and initial connect and the state
|
972 |
* should be cleaned up.
|
973 |
*/
|
974 |
cpu_breakpoint_remove_all(env); |
975 |
cpu_watchpoint_remove_all(env); |
976 |
break;
|
977 |
case 'c': |
978 |
if (*p != '\0') { |
979 |
addr = strtoull(p, (char **)&p, 16); |
980 |
#if defined(TARGET_I386)
|
981 |
env->eip = addr; |
982 |
#elif defined (TARGET_PPC)
|
983 |
env->nip = addr; |
984 |
#elif defined (TARGET_SPARC)
|
985 |
env->pc = addr; |
986 |
env->npc = addr + 4;
|
987 |
#elif defined (TARGET_ARM)
|
988 |
env->regs[15] = addr;
|
989 |
#elif defined (TARGET_SH4)
|
990 |
env->pc = addr; |
991 |
#elif defined (TARGET_MIPS)
|
992 |
env->PC[env->current_tc] = addr; |
993 |
#elif defined (TARGET_CRIS)
|
994 |
env->pc = addr; |
995 |
#endif
|
996 |
} |
997 |
gdb_continue(s); |
998 |
return RS_IDLE;
|
999 |
case 'C': |
1000 |
s->signal = strtoul(p, (char **)&p, 16); |
1001 |
gdb_continue(s); |
1002 |
return RS_IDLE;
|
1003 |
case 'k': |
1004 |
/* Kill the target */
|
1005 |
fprintf(stderr, "\nQEMU: Terminated via GDBstub\n");
|
1006 |
exit(0);
|
1007 |
case 'D': |
1008 |
/* Detach packet */
|
1009 |
cpu_breakpoint_remove_all(env); |
1010 |
cpu_watchpoint_remove_all(env); |
1011 |
gdb_continue(s); |
1012 |
put_packet(s, "OK");
|
1013 |
break;
|
1014 |
case 's': |
1015 |
if (*p != '\0') { |
1016 |
addr = strtoull(p, (char **)&p, 16); |
1017 |
#if defined(TARGET_I386)
|
1018 |
env->eip = addr; |
1019 |
#elif defined (TARGET_PPC)
|
1020 |
env->nip = addr; |
1021 |
#elif defined (TARGET_SPARC)
|
1022 |
env->pc = addr; |
1023 |
env->npc = addr + 4;
|
1024 |
#elif defined (TARGET_ARM)
|
1025 |
env->regs[15] = addr;
|
1026 |
#elif defined (TARGET_SH4)
|
1027 |
env->pc = addr; |
1028 |
#elif defined (TARGET_MIPS)
|
1029 |
env->PC[env->current_tc] = addr; |
1030 |
#elif defined (TARGET_CRIS)
|
1031 |
env->pc = addr; |
1032 |
#endif
|
1033 |
} |
1034 |
cpu_single_step(env, sstep_flags); |
1035 |
gdb_continue(s); |
1036 |
return RS_IDLE;
|
1037 |
case 'F': |
1038 |
{ |
1039 |
target_ulong ret; |
1040 |
target_ulong err; |
1041 |
|
1042 |
ret = strtoull(p, (char **)&p, 16); |
1043 |
if (*p == ',') { |
1044 |
p++; |
1045 |
err = strtoull(p, (char **)&p, 16); |
1046 |
} else {
|
1047 |
err = 0;
|
1048 |
} |
1049 |
if (*p == ',') |
1050 |
p++; |
1051 |
type = *p; |
1052 |
if (gdb_current_syscall_cb)
|
1053 |
gdb_current_syscall_cb(s->env, ret, err); |
1054 |
if (type == 'C') { |
1055 |
put_packet(s, "T02");
|
1056 |
} else {
|
1057 |
gdb_continue(s); |
1058 |
} |
1059 |
} |
1060 |
break;
|
1061 |
case 'g': |
1062 |
reg_size = cpu_gdb_read_registers(env, mem_buf); |
1063 |
memtohex(buf, mem_buf, reg_size); |
1064 |
put_packet(s, buf); |
1065 |
break;
|
1066 |
case 'G': |
1067 |
registers = (void *)mem_buf;
|
1068 |
len = strlen(p) / 2;
|
1069 |
hextomem((uint8_t *)registers, p, len); |
1070 |
cpu_gdb_write_registers(env, mem_buf, len); |
1071 |
put_packet(s, "OK");
|
1072 |
break;
|
1073 |
case 'm': |
1074 |
addr = strtoull(p, (char **)&p, 16); |
1075 |
if (*p == ',') |
1076 |
p++; |
1077 |
len = strtoull(p, NULL, 16); |
1078 |
if (cpu_memory_rw_debug(env, addr, mem_buf, len, 0) != 0) { |
1079 |
put_packet (s, "E14");
|
1080 |
} else {
|
1081 |
memtohex(buf, mem_buf, len); |
1082 |
put_packet(s, buf); |
1083 |
} |
1084 |
break;
|
1085 |
case 'M': |
1086 |
addr = strtoull(p, (char **)&p, 16); |
1087 |
if (*p == ',') |
1088 |
p++; |
1089 |
len = strtoull(p, (char **)&p, 16); |
1090 |
if (*p == ':') |
1091 |
p++; |
1092 |
hextomem(mem_buf, p, len); |
1093 |
if (cpu_memory_rw_debug(env, addr, mem_buf, len, 1) != 0) |
1094 |
put_packet(s, "E14");
|
1095 |
else
|
1096 |
put_packet(s, "OK");
|
1097 |
break;
|
1098 |
case 'Z': |
1099 |
type = strtoul(p, (char **)&p, 16); |
1100 |
if (*p == ',') |
1101 |
p++; |
1102 |
addr = strtoull(p, (char **)&p, 16); |
1103 |
if (*p == ',') |
1104 |
p++; |
1105 |
len = strtoull(p, (char **)&p, 16); |
1106 |
if (type == 0 || type == 1) { |
1107 |
if (cpu_breakpoint_insert(env, addr) < 0) |
1108 |
goto breakpoint_error;
|
1109 |
put_packet(s, "OK");
|
1110 |
#ifndef CONFIG_USER_ONLY
|
1111 |
} else if (type == 2) { |
1112 |
if (cpu_watchpoint_insert(env, addr) < 0) |
1113 |
goto breakpoint_error;
|
1114 |
put_packet(s, "OK");
|
1115 |
#endif
|
1116 |
} else {
|
1117 |
breakpoint_error:
|
1118 |
put_packet(s, "E22");
|
1119 |
} |
1120 |
break;
|
1121 |
case 'z': |
1122 |
type = strtoul(p, (char **)&p, 16); |
1123 |
if (*p == ',') |
1124 |
p++; |
1125 |
addr = strtoull(p, (char **)&p, 16); |
1126 |
if (*p == ',') |
1127 |
p++; |
1128 |
len = strtoull(p, (char **)&p, 16); |
1129 |
if (type == 0 || type == 1) { |
1130 |
cpu_breakpoint_remove(env, addr); |
1131 |
put_packet(s, "OK");
|
1132 |
#ifndef CONFIG_USER_ONLY
|
1133 |
} else if (type == 2) { |
1134 |
cpu_watchpoint_remove(env, addr); |
1135 |
put_packet(s, "OK");
|
1136 |
#endif
|
1137 |
} else {
|
1138 |
goto breakpoint_error;
|
1139 |
} |
1140 |
break;
|
1141 |
case 'q': |
1142 |
case 'Q': |
1143 |
/* parse any 'q' packets here */
|
1144 |
if (!strcmp(p,"qemu.sstepbits")) { |
1145 |
/* Query Breakpoint bit definitions */
|
1146 |
sprintf(buf,"ENABLE=%x,NOIRQ=%x,NOTIMER=%x",
|
1147 |
SSTEP_ENABLE, |
1148 |
SSTEP_NOIRQ, |
1149 |
SSTEP_NOTIMER); |
1150 |
put_packet(s, buf); |
1151 |
break;
|
1152 |
} else if (strncmp(p,"qemu.sstep",10) == 0) { |
1153 |
/* Display or change the sstep_flags */
|
1154 |
p += 10;
|
1155 |
if (*p != '=') { |
1156 |
/* Display current setting */
|
1157 |
sprintf(buf,"0x%x", sstep_flags);
|
1158 |
put_packet(s, buf); |
1159 |
break;
|
1160 |
} |
1161 |
p++; |
1162 |
type = strtoul(p, (char **)&p, 16); |
1163 |
sstep_flags = type; |
1164 |
put_packet(s, "OK");
|
1165 |
break;
|
1166 |
} |
1167 |
#ifdef CONFIG_LINUX_USER
|
1168 |
else if (strncmp(p, "Offsets", 7) == 0) { |
1169 |
TaskState *ts = env->opaque; |
1170 |
|
1171 |
sprintf(buf, |
1172 |
"Text=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx |
1173 |
";Bss=" TARGET_ABI_FMT_lx,
|
1174 |
ts->info->code_offset, |
1175 |
ts->info->data_offset, |
1176 |
ts->info->data_offset); |
1177 |
put_packet(s, buf); |
1178 |
break;
|
1179 |
} |
1180 |
#endif
|
1181 |
/* Fall through. */
|
1182 |
default:
|
1183 |
/* put empty packet */
|
1184 |
buf[0] = '\0'; |
1185 |
put_packet(s, buf); |
1186 |
break;
|
1187 |
} |
1188 |
return RS_IDLE;
|
1189 |
} |
1190 |
|
1191 |
extern void tb_flush(CPUState *env); |
1192 |
|
1193 |
#ifndef CONFIG_USER_ONLY
|
1194 |
static void gdb_vm_stopped(void *opaque, int reason) |
1195 |
{ |
1196 |
GDBState *s = opaque; |
1197 |
char buf[256]; |
1198 |
int ret;
|
1199 |
|
1200 |
if (s->state == RS_SYSCALL)
|
1201 |
return;
|
1202 |
|
1203 |
/* disable single step if it was enable */
|
1204 |
cpu_single_step(s->env, 0);
|
1205 |
|
1206 |
if (reason == EXCP_DEBUG) {
|
1207 |
if (s->env->watchpoint_hit) {
|
1208 |
snprintf(buf, sizeof(buf), "T%02xwatch:" TARGET_FMT_lx ";", |
1209 |
SIGTRAP, |
1210 |
s->env->watchpoint[s->env->watchpoint_hit - 1].vaddr);
|
1211 |
put_packet(s, buf); |
1212 |
s->env->watchpoint_hit = 0;
|
1213 |
return;
|
1214 |
} |
1215 |
tb_flush(s->env); |
1216 |
ret = SIGTRAP; |
1217 |
} else if (reason == EXCP_INTERRUPT) { |
1218 |
ret = SIGINT; |
1219 |
} else {
|
1220 |
ret = 0;
|
1221 |
} |
1222 |
snprintf(buf, sizeof(buf), "S%02x", ret); |
1223 |
put_packet(s, buf); |
1224 |
} |
1225 |
#endif
|
1226 |
|
1227 |
/* Send a gdb syscall request.
|
1228 |
This accepts limited printf-style format specifiers, specifically:
|
1229 |
%x - target_ulong argument printed in hex.
|
1230 |
%lx - 64-bit argument printed in hex.
|
1231 |
%s - string pointer (target_ulong) and length (int) pair. */
|
1232 |
void gdb_do_syscall(gdb_syscall_complete_cb cb, char *fmt, ...) |
1233 |
{ |
1234 |
va_list va; |
1235 |
char buf[256]; |
1236 |
char *p;
|
1237 |
target_ulong addr; |
1238 |
uint64_t i64; |
1239 |
GDBState *s; |
1240 |
|
1241 |
s = gdb_syscall_state; |
1242 |
if (!s)
|
1243 |
return;
|
1244 |
gdb_current_syscall_cb = cb; |
1245 |
s->state = RS_SYSCALL; |
1246 |
#ifndef CONFIG_USER_ONLY
|
1247 |
vm_stop(EXCP_DEBUG); |
1248 |
#endif
|
1249 |
s->state = RS_IDLE; |
1250 |
va_start(va, fmt); |
1251 |
p = buf; |
1252 |
*(p++) = 'F';
|
1253 |
while (*fmt) {
|
1254 |
if (*fmt == '%') { |
1255 |
fmt++; |
1256 |
switch (*fmt++) {
|
1257 |
case 'x': |
1258 |
addr = va_arg(va, target_ulong); |
1259 |
p += sprintf(p, TARGET_FMT_lx, addr); |
1260 |
break;
|
1261 |
case 'l': |
1262 |
if (*(fmt++) != 'x') |
1263 |
goto bad_format;
|
1264 |
i64 = va_arg(va, uint64_t); |
1265 |
p += sprintf(p, "%" PRIx64, i64);
|
1266 |
break;
|
1267 |
case 's': |
1268 |
addr = va_arg(va, target_ulong); |
1269 |
p += sprintf(p, TARGET_FMT_lx "/%x", addr, va_arg(va, int)); |
1270 |
break;
|
1271 |
default:
|
1272 |
bad_format:
|
1273 |
fprintf(stderr, "gdbstub: Bad syscall format string '%s'\n",
|
1274 |
fmt - 1);
|
1275 |
break;
|
1276 |
} |
1277 |
} else {
|
1278 |
*(p++) = *(fmt++); |
1279 |
} |
1280 |
} |
1281 |
*p = 0;
|
1282 |
va_end(va); |
1283 |
put_packet(s, buf); |
1284 |
#ifdef CONFIG_USER_ONLY
|
1285 |
gdb_handlesig(s->env, 0);
|
1286 |
#else
|
1287 |
cpu_interrupt(s->env, CPU_INTERRUPT_EXIT); |
1288 |
#endif
|
1289 |
} |
1290 |
|
1291 |
static void gdb_read_byte(GDBState *s, int ch) |
1292 |
{ |
1293 |
CPUState *env = s->env; |
1294 |
int i, csum;
|
1295 |
uint8_t reply; |
1296 |
|
1297 |
#ifndef CONFIG_USER_ONLY
|
1298 |
if (s->last_packet_len) {
|
1299 |
/* Waiting for a response to the last packet. If we see the start
|
1300 |
of a new command then abandon the previous response. */
|
1301 |
if (ch == '-') { |
1302 |
#ifdef DEBUG_GDB
|
1303 |
printf("Got NACK, retransmitting\n");
|
1304 |
#endif
|
1305 |
put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
1306 |
} |
1307 |
#ifdef DEBUG_GDB
|
1308 |
else if (ch == '+') |
1309 |
printf("Got ACK\n");
|
1310 |
else
|
1311 |
printf("Got '%c' when expecting ACK/NACK\n", ch);
|
1312 |
#endif
|
1313 |
if (ch == '+' || ch == '$') |
1314 |
s->last_packet_len = 0;
|
1315 |
if (ch != '$') |
1316 |
return;
|
1317 |
} |
1318 |
if (vm_running) {
|
1319 |
/* when the CPU is running, we cannot do anything except stop
|
1320 |
it when receiving a char */
|
1321 |
vm_stop(EXCP_INTERRUPT); |
1322 |
} else
|
1323 |
#endif
|
1324 |
{ |
1325 |
switch(s->state) {
|
1326 |
case RS_IDLE:
|
1327 |
if (ch == '$') { |
1328 |
s->line_buf_index = 0;
|
1329 |
s->state = RS_GETLINE; |
1330 |
} |
1331 |
break;
|
1332 |
case RS_GETLINE:
|
1333 |
if (ch == '#') { |
1334 |
s->state = RS_CHKSUM1; |
1335 |
} else if (s->line_buf_index >= sizeof(s->line_buf) - 1) { |
1336 |
s->state = RS_IDLE; |
1337 |
} else {
|
1338 |
s->line_buf[s->line_buf_index++] = ch; |
1339 |
} |
1340 |
break;
|
1341 |
case RS_CHKSUM1:
|
1342 |
s->line_buf[s->line_buf_index] = '\0';
|
1343 |
s->line_csum = fromhex(ch) << 4;
|
1344 |
s->state = RS_CHKSUM2; |
1345 |
break;
|
1346 |
case RS_CHKSUM2:
|
1347 |
s->line_csum |= fromhex(ch); |
1348 |
csum = 0;
|
1349 |
for(i = 0; i < s->line_buf_index; i++) { |
1350 |
csum += s->line_buf[i]; |
1351 |
} |
1352 |
if (s->line_csum != (csum & 0xff)) { |
1353 |
reply = '-';
|
1354 |
put_buffer(s, &reply, 1);
|
1355 |
s->state = RS_IDLE; |
1356 |
} else {
|
1357 |
reply = '+';
|
1358 |
put_buffer(s, &reply, 1);
|
1359 |
s->state = gdb_handle_packet(s, env, s->line_buf); |
1360 |
} |
1361 |
break;
|
1362 |
default:
|
1363 |
abort(); |
1364 |
} |
1365 |
} |
1366 |
} |
1367 |
|
1368 |
#ifdef CONFIG_USER_ONLY
|
1369 |
int
|
1370 |
gdb_handlesig (CPUState *env, int sig)
|
1371 |
{ |
1372 |
GDBState *s; |
1373 |
char buf[256]; |
1374 |
int n;
|
1375 |
|
1376 |
s = &gdbserver_state; |
1377 |
if (gdbserver_fd < 0 || s->fd < 0) |
1378 |
return sig;
|
1379 |
|
1380 |
/* disable single step if it was enabled */
|
1381 |
cpu_single_step(env, 0);
|
1382 |
tb_flush(env); |
1383 |
|
1384 |
if (sig != 0) |
1385 |
{ |
1386 |
snprintf(buf, sizeof(buf), "S%02x", sig); |
1387 |
put_packet(s, buf); |
1388 |
} |
1389 |
/* put_packet() might have detected that the peer terminated the
|
1390 |
connection. */
|
1391 |
if (s->fd < 0) |
1392 |
return sig;
|
1393 |
|
1394 |
sig = 0;
|
1395 |
s->state = RS_IDLE; |
1396 |
s->running_state = 0;
|
1397 |
while (s->running_state == 0) { |
1398 |
n = read (s->fd, buf, 256);
|
1399 |
if (n > 0) |
1400 |
{ |
1401 |
int i;
|
1402 |
|
1403 |
for (i = 0; i < n; i++) |
1404 |
gdb_read_byte (s, buf[i]); |
1405 |
} |
1406 |
else if (n == 0 || errno != EAGAIN) |
1407 |
{ |
1408 |
/* XXX: Connection closed. Should probably wait for annother
|
1409 |
connection before continuing. */
|
1410 |
return sig;
|
1411 |
} |
1412 |
} |
1413 |
sig = s->signal; |
1414 |
s->signal = 0;
|
1415 |
return sig;
|
1416 |
} |
1417 |
|
1418 |
/* Tell the remote gdb that the process has exited. */
|
1419 |
void gdb_exit(CPUState *env, int code) |
1420 |
{ |
1421 |
GDBState *s; |
1422 |
char buf[4]; |
1423 |
|
1424 |
s = &gdbserver_state; |
1425 |
if (gdbserver_fd < 0 || s->fd < 0) |
1426 |
return;
|
1427 |
|
1428 |
snprintf(buf, sizeof(buf), "W%02x", code); |
1429 |
put_packet(s, buf); |
1430 |
} |
1431 |
|
1432 |
|
1433 |
static void gdb_accept(void *opaque) |
1434 |
{ |
1435 |
GDBState *s; |
1436 |
struct sockaddr_in sockaddr;
|
1437 |
socklen_t len; |
1438 |
int val, fd;
|
1439 |
|
1440 |
for(;;) {
|
1441 |
len = sizeof(sockaddr);
|
1442 |
fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len);
|
1443 |
if (fd < 0 && errno != EINTR) { |
1444 |
perror("accept");
|
1445 |
return;
|
1446 |
} else if (fd >= 0) { |
1447 |
break;
|
1448 |
} |
1449 |
} |
1450 |
|
1451 |
/* set short latency */
|
1452 |
val = 1;
|
1453 |
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val)); |
1454 |
|
1455 |
s = &gdbserver_state; |
1456 |
memset (s, 0, sizeof (GDBState)); |
1457 |
s->env = first_cpu; /* XXX: allow to change CPU */
|
1458 |
s->fd = fd; |
1459 |
|
1460 |
gdb_syscall_state = s; |
1461 |
|
1462 |
fcntl(fd, F_SETFL, O_NONBLOCK); |
1463 |
} |
1464 |
|
1465 |
static int gdbserver_open(int port) |
1466 |
{ |
1467 |
struct sockaddr_in sockaddr;
|
1468 |
int fd, val, ret;
|
1469 |
|
1470 |
fd = socket(PF_INET, SOCK_STREAM, 0);
|
1471 |
if (fd < 0) { |
1472 |
perror("socket");
|
1473 |
return -1; |
1474 |
} |
1475 |
|
1476 |
/* allow fast reuse */
|
1477 |
val = 1;
|
1478 |
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&val, sizeof(val)); |
1479 |
|
1480 |
sockaddr.sin_family = AF_INET; |
1481 |
sockaddr.sin_port = htons(port); |
1482 |
sockaddr.sin_addr.s_addr = 0;
|
1483 |
ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); |
1484 |
if (ret < 0) { |
1485 |
perror("bind");
|
1486 |
return -1; |
1487 |
} |
1488 |
ret = listen(fd, 0);
|
1489 |
if (ret < 0) { |
1490 |
perror("listen");
|
1491 |
return -1; |
1492 |
} |
1493 |
return fd;
|
1494 |
} |
1495 |
|
1496 |
int gdbserver_start(int port) |
1497 |
{ |
1498 |
gdbserver_fd = gdbserver_open(port); |
1499 |
if (gdbserver_fd < 0) |
1500 |
return -1; |
1501 |
/* accept connections */
|
1502 |
gdb_accept (NULL);
|
1503 |
return 0; |
1504 |
} |
1505 |
#else
|
1506 |
static int gdb_chr_can_receive(void *opaque) |
1507 |
{ |
1508 |
return 1; |
1509 |
} |
1510 |
|
1511 |
static void gdb_chr_receive(void *opaque, const uint8_t *buf, int size) |
1512 |
{ |
1513 |
GDBState *s = opaque; |
1514 |
int i;
|
1515 |
|
1516 |
for (i = 0; i < size; i++) { |
1517 |
gdb_read_byte(s, buf[i]); |
1518 |
} |
1519 |
} |
1520 |
|
1521 |
static void gdb_chr_event(void *opaque, int event) |
1522 |
{ |
1523 |
switch (event) {
|
1524 |
case CHR_EVENT_RESET:
|
1525 |
vm_stop(EXCP_INTERRUPT); |
1526 |
gdb_syscall_state = opaque; |
1527 |
break;
|
1528 |
default:
|
1529 |
break;
|
1530 |
} |
1531 |
} |
1532 |
|
1533 |
int gdbserver_start(const char *port) |
1534 |
{ |
1535 |
GDBState *s; |
1536 |
char gdbstub_port_name[128]; |
1537 |
int port_num;
|
1538 |
char *p;
|
1539 |
CharDriverState *chr; |
1540 |
|
1541 |
if (!port || !*port)
|
1542 |
return -1; |
1543 |
|
1544 |
port_num = strtol(port, &p, 10);
|
1545 |
if (*p == 0) { |
1546 |
/* A numeric value is interpreted as a port number. */
|
1547 |
snprintf(gdbstub_port_name, sizeof(gdbstub_port_name),
|
1548 |
"tcp::%d,nowait,nodelay,server", port_num);
|
1549 |
port = gdbstub_port_name; |
1550 |
} |
1551 |
|
1552 |
chr = qemu_chr_open(port); |
1553 |
if (!chr)
|
1554 |
return -1; |
1555 |
|
1556 |
s = qemu_mallocz(sizeof(GDBState));
|
1557 |
if (!s) {
|
1558 |
return -1; |
1559 |
} |
1560 |
s->env = first_cpu; /* XXX: allow to change CPU */
|
1561 |
s->chr = chr; |
1562 |
qemu_chr_add_handlers(chr, gdb_chr_can_receive, gdb_chr_receive, |
1563 |
gdb_chr_event, s); |
1564 |
qemu_add_vm_stop_handler(gdb_vm_stopped, s); |
1565 |
return 0; |
1566 |
} |
1567 |
#endif
|