git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3075 c046a42c-6fe2-441c-8c8c-71466251a162
1317 lines
33 KiB
C
1317 lines
33 KiB
C
/*
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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 "vl.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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char last_packet[4100];
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int last_packet_len;
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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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#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 != EINTR && errno != EAGAIN)
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return -1;
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} else if (ret == 0) {
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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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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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char *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, 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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static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
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{
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uint32_t *registers = (uint32_t *)mem_buf;
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int i, fpus;
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for(i = 0; i < 8; i++) {
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registers[i] = env->regs[i];
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}
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registers[8] = env->eip;
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registers[9] = env->eflags;
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registers[10] = env->segs[R_CS].selector;
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registers[11] = env->segs[R_SS].selector;
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registers[12] = env->segs[R_DS].selector;
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registers[13] = env->segs[R_ES].selector;
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registers[14] = env->segs[R_FS].selector;
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registers[15] = env->segs[R_GS].selector;
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/* XXX: convert floats */
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for(i = 0; i < 8; i++) {
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memcpy(mem_buf + 16 * 4 + i * 10, &env->fpregs[i], 10);
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}
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registers[36] = env->fpuc;
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fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
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registers[37] = fpus;
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registers[38] = 0; /* XXX: convert tags */
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registers[39] = 0; /* fiseg */
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registers[40] = 0; /* fioff */
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registers[41] = 0; /* foseg */
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registers[42] = 0; /* fooff */
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registers[43] = 0; /* fop */
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for(i = 0; i < 16; i++)
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tswapls(®isters[i]);
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for(i = 36; i < 44; i++)
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tswapls(®isters[i]);
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return 44 * 4;
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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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uint32_t *registers = (uint32_t *)mem_buf;
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int i;
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for(i = 0; i < 8; i++) {
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env->regs[i] = tswapl(registers[i]);
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}
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env->eip = tswapl(registers[8]);
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env->eflags = tswapl(registers[9]);
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#if defined(CONFIG_USER_ONLY)
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#define LOAD_SEG(index, sreg)\
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if (tswapl(registers[index]) != env->segs[sreg].selector)\
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cpu_x86_load_seg(env, sreg, tswapl(registers[index]));
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LOAD_SEG(10, R_CS);
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LOAD_SEG(11, R_SS);
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LOAD_SEG(12, R_DS);
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LOAD_SEG(13, R_ES);
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LOAD_SEG(14, R_FS);
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LOAD_SEG(15, R_GS);
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#endif
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}
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#elif defined (TARGET_PPC)
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static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
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{
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uint32_t *registers = (uint32_t *)mem_buf, tmp;
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int i;
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/* fill in gprs */
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for(i = 0; i < 32; i++) {
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registers[i] = tswapl(env->gpr[i]);
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}
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/* fill in fprs */
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for (i = 0; i < 32; i++) {
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registers[(i * 2) + 32] = tswapl(*((uint32_t *)&env->fpr[i]));
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registers[(i * 2) + 33] = tswapl(*((uint32_t *)&env->fpr[i] + 1));
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}
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/* nip, msr, ccr, lnk, ctr, xer, mq */
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registers[96] = tswapl(env->nip);
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registers[97] = tswapl(do_load_msr(env));
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tmp = 0;
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for (i = 0; i < 8; i++)
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tmp |= env->crf[i] << (32 - ((i + 1) * 4));
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registers[98] = tswapl(tmp);
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registers[99] = tswapl(env->lr);
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registers[100] = tswapl(env->ctr);
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registers[101] = tswapl(ppc_load_xer(env));
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registers[102] = 0;
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return 103 * 4;
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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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uint32_t *registers = (uint32_t *)mem_buf;
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int i;
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/* fill in gprs */
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for (i = 0; i < 32; i++) {
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env->gpr[i] = tswapl(registers[i]);
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}
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/* fill in fprs */
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for (i = 0; i < 32; i++) {
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*((uint32_t *)&env->fpr[i]) = tswapl(registers[(i * 2) + 32]);
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*((uint32_t *)&env->fpr[i] + 1) = tswapl(registers[(i * 2) + 33]);
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}
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/* nip, msr, ccr, lnk, ctr, xer, mq */
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env->nip = tswapl(registers[96]);
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do_store_msr(env, tswapl(registers[97]));
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registers[98] = tswapl(registers[98]);
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for (i = 0; i < 8; i++)
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env->crf[i] = (registers[98] >> (32 - ((i + 1) * 4))) & 0xF;
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env->lr = tswapl(registers[99]);
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env->ctr = tswapl(registers[100]);
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ppc_store_xer(env, tswapl(registers[101]));
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}
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#elif defined (TARGET_SPARC)
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static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
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{
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target_ulong *registers = (target_ulong *)mem_buf;
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int i;
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/* fill in g0..g7 */
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for(i = 0; i < 8; i++) {
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registers[i] = tswapl(env->gregs[i]);
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}
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/* fill in register window */
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for(i = 0; i < 24; i++) {
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registers[i + 8] = tswapl(env->regwptr[i]);
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}
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#ifndef TARGET_SPARC64
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/* fill in fprs */
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for (i = 0; i < 32; i++) {
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registers[i + 32] = tswapl(*((uint32_t *)&env->fpr[i]));
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}
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/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
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registers[64] = tswapl(env->y);
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{
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target_ulong tmp;
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tmp = GET_PSR(env);
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registers[65] = tswapl(tmp);
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}
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registers[66] = tswapl(env->wim);
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registers[67] = tswapl(env->tbr);
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registers[68] = tswapl(env->pc);
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registers[69] = tswapl(env->npc);
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registers[70] = tswapl(env->fsr);
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registers[71] = 0; /* csr */
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registers[72] = 0;
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return 73 * sizeof(target_ulong);
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#else
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/* fill in fprs */
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for (i = 0; i < 64; i += 2) {
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uint64_t tmp;
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tmp = ((uint64_t)*(uint32_t *)&env->fpr[i]) << 32;
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tmp |= *(uint32_t *)&env->fpr[i + 1];
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registers[i / 2 + 32] = tswap64(tmp);
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}
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registers[64] = tswapl(env->pc);
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registers[65] = tswapl(env->npc);
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registers[66] = tswapl(((uint64_t)GET_CCR(env) << 32) |
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((env->asi & 0xff) << 24) |
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((env->pstate & 0xfff) << 8) |
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GET_CWP64(env));
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registers[67] = tswapl(env->fsr);
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registers[68] = tswapl(env->fprs);
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registers[69] = tswapl(env->y);
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return 70 * sizeof(target_ulong);
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#endif
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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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target_ulong *registers = (target_ulong *)mem_buf;
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int i;
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/* fill in g0..g7 */
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for(i = 0; i < 7; i++) {
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env->gregs[i] = tswapl(registers[i]);
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}
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/* fill in register window */
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for(i = 0; i < 24; i++) {
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env->regwptr[i] = tswapl(registers[i + 8]);
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}
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#ifndef TARGET_SPARC64
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/* fill in fprs */
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for (i = 0; i < 32; i++) {
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*((uint32_t *)&env->fpr[i]) = tswapl(registers[i + 32]);
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}
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/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
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env->y = tswapl(registers[64]);
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PUT_PSR(env, tswapl(registers[65]));
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env->wim = tswapl(registers[66]);
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env->tbr = tswapl(registers[67]);
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env->pc = tswapl(registers[68]);
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env->npc = tswapl(registers[69]);
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env->fsr = tswapl(registers[70]);
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#else
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for (i = 0; i < 64; i += 2) {
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uint64_t tmp;
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tmp = tswap64(registers[i / 2 + 32]);
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*((uint32_t *)&env->fpr[i]) = tmp >> 32;
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*((uint32_t *)&env->fpr[i + 1]) = tmp & 0xffffffff;
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}
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env->pc = tswapl(registers[64]);
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env->npc = tswapl(registers[65]);
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{
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uint64_t tmp = tswapl(registers[66]);
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PUT_CCR(env, tmp >> 32);
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env->asi = (tmp >> 24) & 0xff;
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env->pstate = (tmp >> 8) & 0xfff;
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PUT_CWP64(env, tmp & 0xff);
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}
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env->fsr = tswapl(registers[67]);
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env->fprs = tswapl(registers[68]);
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env->y = tswapl(registers[69]);
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#endif
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}
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#elif defined (TARGET_ARM)
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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;
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uint8_t *ptr;
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ptr = mem_buf;
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/* 16 core integer registers (4 bytes each). */
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for (i = 0; i < 16; i++)
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{
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*(uint32_t *)ptr = tswapl(env->regs[i]);
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ptr += 4;
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}
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/* 8 FPA registers (12 bytes each), FPS (4 bytes).
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Not yet implemented. */
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memset (ptr, 0, 8 * 12 + 4);
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ptr += 8 * 12 + 4;
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/* CPSR (4 bytes). */
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*(uint32_t *)ptr = tswapl (cpsr_read(env));
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ptr += 4;
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return ptr - mem_buf;
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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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int i;
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uint8_t *ptr;
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ptr = mem_buf;
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/* Core integer registers. */
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for (i = 0; i < 16; i++)
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{
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env->regs[i] = tswapl(*(uint32_t *)ptr);
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ptr += 4;
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}
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/* Ignore FPA regs and scr. */
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ptr += 8 * 12 + 4;
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cpsr_write (env, tswapl(*(uint32_t *)ptr), 0xffffffff);
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}
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#elif defined (TARGET_M68K)
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static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
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{
|
|
int i;
|
|
uint8_t *ptr;
|
|
CPU_DoubleU u;
|
|
|
|
ptr = mem_buf;
|
|
/* D0-D7 */
|
|
for (i = 0; i < 8; i++) {
|
|
*(uint32_t *)ptr = tswapl(env->dregs[i]);
|
|
ptr += 4;
|
|
}
|
|
/* A0-A7 */
|
|
for (i = 0; i < 8; i++) {
|
|
*(uint32_t *)ptr = tswapl(env->aregs[i]);
|
|
ptr += 4;
|
|
}
|
|
*(uint32_t *)ptr = tswapl(env->sr);
|
|
ptr += 4;
|
|
*(uint32_t *)ptr = tswapl(env->pc);
|
|
ptr += 4;
|
|
/* F0-F7. The 68881/68040 have 12-bit extended precision registers.
|
|
ColdFire has 8-bit double precision registers. */
|
|
for (i = 0; i < 8; i++) {
|
|
u.d = env->fregs[i];
|
|
*(uint32_t *)ptr = tswap32(u.l.upper);
|
|
*(uint32_t *)ptr = tswap32(u.l.lower);
|
|
}
|
|
/* FP control regs (not implemented). */
|
|
memset (ptr, 0, 3 * 4);
|
|
ptr += 3 * 4;
|
|
|
|
return ptr - mem_buf;
|
|
}
|
|
|
|
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
|
|
{
|
|
int i;
|
|
uint8_t *ptr;
|
|
CPU_DoubleU u;
|
|
|
|
ptr = mem_buf;
|
|
/* D0-D7 */
|
|
for (i = 0; i < 8; i++) {
|
|
env->dregs[i] = tswapl(*(uint32_t *)ptr);
|
|
ptr += 4;
|
|
}
|
|
/* A0-A7 */
|
|
for (i = 0; i < 8; i++) {
|
|
env->aregs[i] = tswapl(*(uint32_t *)ptr);
|
|
ptr += 4;
|
|
}
|
|
env->sr = tswapl(*(uint32_t *)ptr);
|
|
ptr += 4;
|
|
env->pc = tswapl(*(uint32_t *)ptr);
|
|
ptr += 4;
|
|
/* F0-F7. The 68881/68040 have 12-bit extended precision registers.
|
|
ColdFire has 8-bit double precision registers. */
|
|
for (i = 0; i < 8; i++) {
|
|
u.l.upper = tswap32(*(uint32_t *)ptr);
|
|
u.l.lower = tswap32(*(uint32_t *)ptr);
|
|
env->fregs[i] = u.d;
|
|
}
|
|
/* FP control regs (not implemented). */
|
|
ptr += 3 * 4;
|
|
}
|
|
#elif defined (TARGET_MIPS)
|
|
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
|
|
{
|
|
int i;
|
|
uint8_t *ptr;
|
|
|
|
ptr = mem_buf;
|
|
for (i = 0; i < 32; i++)
|
|
{
|
|
*(target_ulong *)ptr = tswapl(env->gpr[i]);
|
|
ptr += sizeof(target_ulong);
|
|
}
|
|
|
|
*(target_ulong *)ptr = tswapl(env->CP0_Status);
|
|
ptr += sizeof(target_ulong);
|
|
|
|
*(target_ulong *)ptr = tswapl(env->LO);
|
|
ptr += sizeof(target_ulong);
|
|
|
|
*(target_ulong *)ptr = tswapl(env->HI);
|
|
ptr += sizeof(target_ulong);
|
|
|
|
*(target_ulong *)ptr = tswapl(env->CP0_BadVAddr);
|
|
ptr += sizeof(target_ulong);
|
|
|
|
*(target_ulong *)ptr = tswapl(env->CP0_Cause);
|
|
ptr += sizeof(target_ulong);
|
|
|
|
*(target_ulong *)ptr = tswapl(env->PC);
|
|
ptr += sizeof(target_ulong);
|
|
|
|
if (env->CP0_Config1 & (1 << CP0C1_FP))
|
|
{
|
|
for (i = 0; i < 32; i++)
|
|
{
|
|
*(target_ulong *)ptr = tswapl(env->fpr[i].fs[FP_ENDIAN_IDX]);
|
|
ptr += sizeof(target_ulong);
|
|
}
|
|
|
|
*(target_ulong *)ptr = tswapl(env->fcr31);
|
|
ptr += sizeof(target_ulong);
|
|
|
|
*(target_ulong *)ptr = tswapl(env->fcr0);
|
|
ptr += sizeof(target_ulong);
|
|
}
|
|
|
|
/* 32 FP registers, fsr, fir, fp. Not yet implemented. */
|
|
/* what's 'fp' mean here? */
|
|
|
|
return ptr - mem_buf;
|
|
}
|
|
|
|
/* convert MIPS rounding mode in FCR31 to IEEE library */
|
|
static unsigned int ieee_rm[] =
|
|
{
|
|
float_round_nearest_even,
|
|
float_round_to_zero,
|
|
float_round_up,
|
|
float_round_down
|
|
};
|
|
#define RESTORE_ROUNDING_MODE \
|
|
set_float_rounding_mode(ieee_rm[env->fcr31 & 3], &env->fp_status)
|
|
|
|
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
|
|
{
|
|
int i;
|
|
uint8_t *ptr;
|
|
|
|
ptr = mem_buf;
|
|
for (i = 0; i < 32; i++)
|
|
{
|
|
env->gpr[i] = tswapl(*(target_ulong *)ptr);
|
|
ptr += sizeof(target_ulong);
|
|
}
|
|
|
|
env->CP0_Status = tswapl(*(target_ulong *)ptr);
|
|
ptr += sizeof(target_ulong);
|
|
|
|
env->LO = tswapl(*(target_ulong *)ptr);
|
|
ptr += sizeof(target_ulong);
|
|
|
|
env->HI = tswapl(*(target_ulong *)ptr);
|
|
ptr += sizeof(target_ulong);
|
|
|
|
env->CP0_BadVAddr = tswapl(*(target_ulong *)ptr);
|
|
ptr += sizeof(target_ulong);
|
|
|
|
env->CP0_Cause = tswapl(*(target_ulong *)ptr);
|
|
ptr += sizeof(target_ulong);
|
|
|
|
env->PC = tswapl(*(target_ulong *)ptr);
|
|
ptr += sizeof(target_ulong);
|
|
|
|
if (env->CP0_Config1 & (1 << CP0C1_FP))
|
|
{
|
|
for (i = 0; i < 32; i++)
|
|
{
|
|
env->fpr[i].fs[FP_ENDIAN_IDX] = tswapl(*(target_ulong *)ptr);
|
|
ptr += sizeof(target_ulong);
|
|
}
|
|
|
|
env->fcr31 = tswapl(*(target_ulong *)ptr) & 0x0183FFFF;
|
|
ptr += sizeof(target_ulong);
|
|
|
|
env->fcr0 = tswapl(*(target_ulong *)ptr);
|
|
ptr += sizeof(target_ulong);
|
|
|
|
/* set rounding mode */
|
|
RESTORE_ROUNDING_MODE;
|
|
|
|
#ifndef CONFIG_SOFTFLOAT
|
|
/* no floating point exception for native float */
|
|
SET_FP_ENABLE(env->fcr31, 0);
|
|
#endif
|
|
}
|
|
}
|
|
#elif defined (TARGET_SH4)
|
|
|
|
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
|
|
|
|
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
|
|
{
|
|
uint32_t *ptr = (uint32_t *)mem_buf;
|
|
int i;
|
|
|
|
#define SAVE(x) *ptr++=tswapl(x)
|
|
if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
|
|
for (i = 0; i < 8; i++) SAVE(env->gregs[i + 16]);
|
|
} else {
|
|
for (i = 0; i < 8; i++) SAVE(env->gregs[i]);
|
|
}
|
|
for (i = 8; i < 16; i++) SAVE(env->gregs[i]);
|
|
SAVE (env->pc);
|
|
SAVE (env->pr);
|
|
SAVE (env->gbr);
|
|
SAVE (env->vbr);
|
|
SAVE (env->mach);
|
|
SAVE (env->macl);
|
|
SAVE (env->sr);
|
|
SAVE (env->fpul);
|
|
SAVE (env->fpscr);
|
|
for (i = 0; i < 16; i++)
|
|
SAVE(env->fregs[i + ((env->fpscr & FPSCR_FR) ? 16 : 0)]);
|
|
SAVE (env->ssr);
|
|
SAVE (env->spc);
|
|
for (i = 0; i < 8; i++) SAVE(env->gregs[i]);
|
|
for (i = 0; i < 8; i++) SAVE(env->gregs[i + 16]);
|
|
return ((uint8_t *)ptr - mem_buf);
|
|
}
|
|
|
|
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
|
|
{
|
|
uint32_t *ptr = (uint32_t *)mem_buf;
|
|
int i;
|
|
|
|
#define LOAD(x) (x)=*ptr++;
|
|
if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
|
|
for (i = 0; i < 8; i++) LOAD(env->gregs[i + 16]);
|
|
} else {
|
|
for (i = 0; i < 8; i++) LOAD(env->gregs[i]);
|
|
}
|
|
for (i = 8; i < 16; i++) LOAD(env->gregs[i]);
|
|
LOAD (env->pc);
|
|
LOAD (env->pr);
|
|
LOAD (env->gbr);
|
|
LOAD (env->vbr);
|
|
LOAD (env->mach);
|
|
LOAD (env->macl);
|
|
LOAD (env->sr);
|
|
LOAD (env->fpul);
|
|
LOAD (env->fpscr);
|
|
for (i = 0; i < 16; i++)
|
|
LOAD(env->fregs[i + ((env->fpscr & FPSCR_FR) ? 16 : 0)]);
|
|
LOAD (env->ssr);
|
|
LOAD (env->spc);
|
|
for (i = 0; i < 8; i++) LOAD(env->gregs[i]);
|
|
for (i = 0; i < 8; i++) LOAD(env->gregs[i + 16]);
|
|
}
|
|
#else
|
|
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
static int gdb_handle_packet(GDBState *s, CPUState *env, const char *line_buf)
|
|
{
|
|
const char *p;
|
|
int ch, reg_size, type;
|
|
char buf[4096];
|
|
uint8_t mem_buf[2000];
|
|
uint32_t *registers;
|
|
target_ulong addr, len;
|
|
|
|
#ifdef DEBUG_GDB
|
|
printf("command='%s'\n", line_buf);
|
|
#endif
|
|
p = line_buf;
|
|
ch = *p++;
|
|
switch(ch) {
|
|
case '?':
|
|
/* TODO: Make this return the correct value for user-mode. */
|
|
snprintf(buf, sizeof(buf), "S%02x", SIGTRAP);
|
|
put_packet(s, buf);
|
|
break;
|
|
case 'c':
|
|
if (*p != '\0') {
|
|
addr = strtoull(p, (char **)&p, 16);
|
|
#if defined(TARGET_I386)
|
|
env->eip = addr;
|
|
#elif defined (TARGET_PPC)
|
|
env->nip = addr;
|
|
#elif defined (TARGET_SPARC)
|
|
env->pc = addr;
|
|
env->npc = addr + 4;
|
|
#elif defined (TARGET_ARM)
|
|
env->regs[15] = addr;
|
|
#elif defined (TARGET_SH4)
|
|
env->pc = addr;
|
|
#elif defined (TARGET_MIPS)
|
|
env->PC = addr;
|
|
#endif
|
|
}
|
|
#ifdef CONFIG_USER_ONLY
|
|
s->running_state = 1;
|
|
#else
|
|
vm_start();
|
|
#endif
|
|
return RS_IDLE;
|
|
case 's':
|
|
if (*p != '\0') {
|
|
addr = strtoull(p, (char **)&p, 16);
|
|
#if defined(TARGET_I386)
|
|
env->eip = addr;
|
|
#elif defined (TARGET_PPC)
|
|
env->nip = addr;
|
|
#elif defined (TARGET_SPARC)
|
|
env->pc = addr;
|
|
env->npc = addr + 4;
|
|
#elif defined (TARGET_ARM)
|
|
env->regs[15] = addr;
|
|
#elif defined (TARGET_SH4)
|
|
env->pc = addr;
|
|
#elif defined (TARGET_MIPS)
|
|
env->PC = addr;
|
|
#endif
|
|
}
|
|
cpu_single_step(env, 1);
|
|
#ifdef CONFIG_USER_ONLY
|
|
s->running_state = 1;
|
|
#else
|
|
vm_start();
|
|
#endif
|
|
return RS_IDLE;
|
|
case 'F':
|
|
{
|
|
target_ulong ret;
|
|
target_ulong err;
|
|
|
|
ret = strtoull(p, (char **)&p, 16);
|
|
if (*p == ',') {
|
|
p++;
|
|
err = strtoull(p, (char **)&p, 16);
|
|
} else {
|
|
err = 0;
|
|
}
|
|
if (*p == ',')
|
|
p++;
|
|
type = *p;
|
|
if (gdb_current_syscall_cb)
|
|
gdb_current_syscall_cb(s->env, ret, err);
|
|
if (type == 'C') {
|
|
put_packet(s, "T02");
|
|
} else {
|
|
#ifdef CONFIG_USER_ONLY
|
|
s->running_state = 1;
|
|
#else
|
|
vm_start();
|
|
#endif
|
|
}
|
|
}
|
|
break;
|
|
case 'g':
|
|
reg_size = cpu_gdb_read_registers(env, mem_buf);
|
|
memtohex(buf, mem_buf, reg_size);
|
|
put_packet(s, buf);
|
|
break;
|
|
case 'G':
|
|
registers = (void *)mem_buf;
|
|
len = strlen(p) / 2;
|
|
hextomem((uint8_t *)registers, p, len);
|
|
cpu_gdb_write_registers(env, mem_buf, len);
|
|
put_packet(s, "OK");
|
|
break;
|
|
case 'm':
|
|
addr = strtoull(p, (char **)&p, 16);
|
|
if (*p == ',')
|
|
p++;
|
|
len = strtoull(p, NULL, 16);
|
|
if (cpu_memory_rw_debug(env, addr, mem_buf, len, 0) != 0) {
|
|
put_packet (s, "E14");
|
|
} else {
|
|
memtohex(buf, mem_buf, len);
|
|
put_packet(s, buf);
|
|
}
|
|
break;
|
|
case 'M':
|
|
addr = strtoull(p, (char **)&p, 16);
|
|
if (*p == ',')
|
|
p++;
|
|
len = strtoull(p, (char **)&p, 16);
|
|
if (*p == ':')
|
|
p++;
|
|
hextomem(mem_buf, p, len);
|
|
if (cpu_memory_rw_debug(env, addr, mem_buf, len, 1) != 0)
|
|
put_packet(s, "E14");
|
|
else
|
|
put_packet(s, "OK");
|
|
break;
|
|
case 'Z':
|
|
type = strtoul(p, (char **)&p, 16);
|
|
if (*p == ',')
|
|
p++;
|
|
addr = strtoull(p, (char **)&p, 16);
|
|
if (*p == ',')
|
|
p++;
|
|
len = strtoull(p, (char **)&p, 16);
|
|
if (type == 0 || type == 1) {
|
|
if (cpu_breakpoint_insert(env, addr) < 0)
|
|
goto breakpoint_error;
|
|
put_packet(s, "OK");
|
|
#ifndef CONFIG_USER_ONLY
|
|
} else if (type == 2) {
|
|
if (cpu_watchpoint_insert(env, addr) < 0)
|
|
goto breakpoint_error;
|
|
put_packet(s, "OK");
|
|
#endif
|
|
} else {
|
|
breakpoint_error:
|
|
put_packet(s, "E22");
|
|
}
|
|
break;
|
|
case 'z':
|
|
type = strtoul(p, (char **)&p, 16);
|
|
if (*p == ',')
|
|
p++;
|
|
addr = strtoull(p, (char **)&p, 16);
|
|
if (*p == ',')
|
|
p++;
|
|
len = strtoull(p, (char **)&p, 16);
|
|
if (type == 0 || type == 1) {
|
|
cpu_breakpoint_remove(env, addr);
|
|
put_packet(s, "OK");
|
|
#ifndef CONFIG_USER_ONLY
|
|
} else if (type == 2) {
|
|
cpu_watchpoint_remove(env, addr);
|
|
put_packet(s, "OK");
|
|
#endif
|
|
} else {
|
|
goto breakpoint_error;
|
|
}
|
|
break;
|
|
#ifdef CONFIG_LINUX_USER
|
|
case 'q':
|
|
if (strncmp(p, "Offsets", 7) == 0) {
|
|
TaskState *ts = env->opaque;
|
|
|
|
sprintf(buf,
|
|
"Text=" TARGET_FMT_lx ";Data=" TARGET_FMT_lx ";Bss=" TARGET_FMT_lx,
|
|
ts->info->code_offset,
|
|
ts->info->data_offset,
|
|
ts->info->data_offset);
|
|
put_packet(s, buf);
|
|
break;
|
|
}
|
|
/* Fall through. */
|
|
#endif
|
|
default:
|
|
// unknown_command:
|
|
/* put empty packet */
|
|
buf[0] = '\0';
|
|
put_packet(s, buf);
|
|
break;
|
|
}
|
|
return RS_IDLE;
|
|
}
|
|
|
|
extern void tb_flush(CPUState *env);
|
|
|
|
#ifndef CONFIG_USER_ONLY
|
|
static void gdb_vm_stopped(void *opaque, int reason)
|
|
{
|
|
GDBState *s = opaque;
|
|
char buf[256];
|
|
int ret;
|
|
|
|
if (s->state == RS_SYSCALL)
|
|
return;
|
|
|
|
/* disable single step if it was enable */
|
|
cpu_single_step(s->env, 0);
|
|
|
|
if (reason == EXCP_DEBUG) {
|
|
if (s->env->watchpoint_hit) {
|
|
snprintf(buf, sizeof(buf), "T%02xwatch:" TARGET_FMT_lx ";",
|
|
SIGTRAP,
|
|
s->env->watchpoint[s->env->watchpoint_hit - 1].vaddr);
|
|
put_packet(s, buf);
|
|
s->env->watchpoint_hit = 0;
|
|
return;
|
|
}
|
|
tb_flush(s->env);
|
|
ret = SIGTRAP;
|
|
} else if (reason == EXCP_INTERRUPT) {
|
|
ret = SIGINT;
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
snprintf(buf, sizeof(buf), "S%02x", ret);
|
|
put_packet(s, buf);
|
|
}
|
|
#endif
|
|
|
|
/* Send a gdb syscall request.
|
|
This accepts limited printf-style format specifiers, specifically:
|
|
%x - target_ulong argument printed in hex.
|
|
%lx - 64-bit argument printed in hex.
|
|
%s - string pointer (target_ulong) and length (int) pair. */
|
|
void gdb_do_syscall(gdb_syscall_complete_cb cb, char *fmt, ...)
|
|
{
|
|
va_list va;
|
|
char buf[256];
|
|
char *p;
|
|
target_ulong addr;
|
|
uint64_t i64;
|
|
GDBState *s;
|
|
|
|
s = gdb_syscall_state;
|
|
if (!s)
|
|
return;
|
|
gdb_current_syscall_cb = cb;
|
|
s->state = RS_SYSCALL;
|
|
#ifndef CONFIG_USER_ONLY
|
|
vm_stop(EXCP_DEBUG);
|
|
#endif
|
|
s->state = RS_IDLE;
|
|
va_start(va, fmt);
|
|
p = buf;
|
|
*(p++) = 'F';
|
|
while (*fmt) {
|
|
if (*fmt == '%') {
|
|
fmt++;
|
|
switch (*fmt++) {
|
|
case 'x':
|
|
addr = va_arg(va, target_ulong);
|
|
p += sprintf(p, TARGET_FMT_lx, addr);
|
|
break;
|
|
case 'l':
|
|
if (*(fmt++) != 'x')
|
|
goto bad_format;
|
|
i64 = va_arg(va, uint64_t);
|
|
p += sprintf(p, "%" PRIx64, i64);
|
|
break;
|
|
case 's':
|
|
addr = va_arg(va, target_ulong);
|
|
p += sprintf(p, TARGET_FMT_lx "/%x", addr, va_arg(va, int));
|
|
break;
|
|
default:
|
|
bad_format:
|
|
fprintf(stderr, "gdbstub: Bad syscall format string '%s'\n",
|
|
fmt - 1);
|
|
break;
|
|
}
|
|
} else {
|
|
*(p++) = *(fmt++);
|
|
}
|
|
}
|
|
va_end(va);
|
|
put_packet(s, buf);
|
|
#ifdef CONFIG_USER_ONLY
|
|
gdb_handlesig(s->env, 0);
|
|
#else
|
|
cpu_interrupt(s->env, CPU_INTERRUPT_EXIT);
|
|
#endif
|
|
}
|
|
|
|
static void gdb_read_byte(GDBState *s, int ch)
|
|
{
|
|
CPUState *env = s->env;
|
|
int i, csum;
|
|
char reply[1];
|
|
|
|
#ifndef CONFIG_USER_ONLY
|
|
if (s->last_packet_len) {
|
|
/* Waiting for a response to the last packet. If we see the start
|
|
of a new command then abandon the previous response. */
|
|
if (ch == '-') {
|
|
#ifdef DEBUG_GDB
|
|
printf("Got NACK, retransmitting\n");
|
|
#endif
|
|
put_buffer(s, s->last_packet, s->last_packet_len);
|
|
}
|
|
#ifdef DEBUG_GDB
|
|
else if (ch == '+')
|
|
printf("Got ACK\n");
|
|
else
|
|
printf("Got '%c' when expecting ACK/NACK\n", ch);
|
|
#endif
|
|
if (ch == '+' || ch == '$')
|
|
s->last_packet_len = 0;
|
|
if (ch != '$')
|
|
return;
|
|
}
|
|
if (vm_running) {
|
|
/* when the CPU is running, we cannot do anything except stop
|
|
it when receiving a char */
|
|
vm_stop(EXCP_INTERRUPT);
|
|
} else
|
|
#endif
|
|
{
|
|
switch(s->state) {
|
|
case RS_IDLE:
|
|
if (ch == '$') {
|
|
s->line_buf_index = 0;
|
|
s->state = RS_GETLINE;
|
|
}
|
|
break;
|
|
case RS_GETLINE:
|
|
if (ch == '#') {
|
|
s->state = RS_CHKSUM1;
|
|
} else if (s->line_buf_index >= sizeof(s->line_buf) - 1) {
|
|
s->state = RS_IDLE;
|
|
} else {
|
|
s->line_buf[s->line_buf_index++] = ch;
|
|
}
|
|
break;
|
|
case RS_CHKSUM1:
|
|
s->line_buf[s->line_buf_index] = '\0';
|
|
s->line_csum = fromhex(ch) << 4;
|
|
s->state = RS_CHKSUM2;
|
|
break;
|
|
case RS_CHKSUM2:
|
|
s->line_csum |= fromhex(ch);
|
|
csum = 0;
|
|
for(i = 0; i < s->line_buf_index; i++) {
|
|
csum += s->line_buf[i];
|
|
}
|
|
if (s->line_csum != (csum & 0xff)) {
|
|
reply[0] = '-';
|
|
put_buffer(s, reply, 1);
|
|
s->state = RS_IDLE;
|
|
} else {
|
|
reply[0] = '+';
|
|
put_buffer(s, reply, 1);
|
|
s->state = gdb_handle_packet(s, env, s->line_buf);
|
|
}
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_USER_ONLY
|
|
int
|
|
gdb_handlesig (CPUState *env, int sig)
|
|
{
|
|
GDBState *s;
|
|
char buf[256];
|
|
int n;
|
|
|
|
if (gdbserver_fd < 0)
|
|
return sig;
|
|
|
|
s = &gdbserver_state;
|
|
|
|
/* disable single step if it was enabled */
|
|
cpu_single_step(env, 0);
|
|
tb_flush(env);
|
|
|
|
if (sig != 0)
|
|
{
|
|
snprintf(buf, sizeof(buf), "S%02x", sig);
|
|
put_packet(s, buf);
|
|
}
|
|
|
|
sig = 0;
|
|
s->state = RS_IDLE;
|
|
s->running_state = 0;
|
|
while (s->running_state == 0) {
|
|
n = read (s->fd, buf, 256);
|
|
if (n > 0)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < n; i++)
|
|
gdb_read_byte (s, buf[i]);
|
|
}
|
|
else if (n == 0 || errno != EAGAIN)
|
|
{
|
|
/* XXX: Connection closed. Should probably wait for annother
|
|
connection before continuing. */
|
|
return sig;
|
|
}
|
|
}
|
|
return sig;
|
|
}
|
|
|
|
/* Tell the remote gdb that the process has exited. */
|
|
void gdb_exit(CPUState *env, int code)
|
|
{
|
|
GDBState *s;
|
|
char buf[4];
|
|
|
|
if (gdbserver_fd < 0)
|
|
return;
|
|
|
|
s = &gdbserver_state;
|
|
|
|
snprintf(buf, sizeof(buf), "W%02x", code);
|
|
put_packet(s, buf);
|
|
}
|
|
|
|
|
|
static void gdb_accept(void *opaque)
|
|
{
|
|
GDBState *s;
|
|
struct sockaddr_in sockaddr;
|
|
socklen_t len;
|
|
int val, fd;
|
|
|
|
for(;;) {
|
|
len = sizeof(sockaddr);
|
|
fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len);
|
|
if (fd < 0 && errno != EINTR) {
|
|
perror("accept");
|
|
return;
|
|
} else if (fd >= 0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* set short latency */
|
|
val = 1;
|
|
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
|
|
|
|
s = &gdbserver_state;
|
|
memset (s, 0, sizeof (GDBState));
|
|
s->env = first_cpu; /* XXX: allow to change CPU */
|
|
s->fd = fd;
|
|
|
|
gdb_syscall_state = s;
|
|
|
|
fcntl(fd, F_SETFL, O_NONBLOCK);
|
|
}
|
|
|
|
static int gdbserver_open(int port)
|
|
{
|
|
struct sockaddr_in sockaddr;
|
|
int fd, val, ret;
|
|
|
|
fd = socket(PF_INET, SOCK_STREAM, 0);
|
|
if (fd < 0) {
|
|
perror("socket");
|
|
return -1;
|
|
}
|
|
|
|
/* allow fast reuse */
|
|
val = 1;
|
|
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&val, sizeof(val));
|
|
|
|
sockaddr.sin_family = AF_INET;
|
|
sockaddr.sin_port = htons(port);
|
|
sockaddr.sin_addr.s_addr = 0;
|
|
ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr));
|
|
if (ret < 0) {
|
|
perror("bind");
|
|
return -1;
|
|
}
|
|
ret = listen(fd, 0);
|
|
if (ret < 0) {
|
|
perror("listen");
|
|
return -1;
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
int gdbserver_start(int port)
|
|
{
|
|
gdbserver_fd = gdbserver_open(port);
|
|
if (gdbserver_fd < 0)
|
|
return -1;
|
|
/* accept connections */
|
|
gdb_accept (NULL);
|
|
return 0;
|
|
}
|
|
#else
|
|
static int gdb_chr_can_receive(void *opaque)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static void gdb_chr_receive(void *opaque, const uint8_t *buf, int size)
|
|
{
|
|
GDBState *s = opaque;
|
|
int i;
|
|
|
|
for (i = 0; i < size; i++) {
|
|
gdb_read_byte(s, buf[i]);
|
|
}
|
|
}
|
|
|
|
static void gdb_chr_event(void *opaque, int event)
|
|
{
|
|
switch (event) {
|
|
case CHR_EVENT_RESET:
|
|
vm_stop(EXCP_INTERRUPT);
|
|
gdb_syscall_state = opaque;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
int gdbserver_start(const char *port)
|
|
{
|
|
GDBState *s;
|
|
char gdbstub_port_name[128];
|
|
int port_num;
|
|
char *p;
|
|
CharDriverState *chr;
|
|
|
|
if (!port || !*port)
|
|
return -1;
|
|
|
|
port_num = strtol(port, &p, 10);
|
|
if (*p == 0) {
|
|
/* A numeric value is interpreted as a port number. */
|
|
snprintf(gdbstub_port_name, sizeof(gdbstub_port_name),
|
|
"tcp::%d,nowait,nodelay,server", port_num);
|
|
port = gdbstub_port_name;
|
|
}
|
|
|
|
chr = qemu_chr_open(port);
|
|
if (!chr)
|
|
return -1;
|
|
|
|
s = qemu_mallocz(sizeof(GDBState));
|
|
if (!s) {
|
|
return -1;
|
|
}
|
|
s->env = first_cpu; /* XXX: allow to change CPU */
|
|
s->chr = chr;
|
|
qemu_chr_add_handlers(chr, gdb_chr_can_receive, gdb_chr_receive,
|
|
gdb_chr_event, s);
|
|
qemu_add_vm_stop_handler(gdb_vm_stopped, s);
|
|
return 0;
|
|
}
|
|
#endif
|