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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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#include "qemu-common.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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|
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#include "qemu.h" |
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#else
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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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#define MAX_PACKET_LENGTH 4096 |
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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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|
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//#define DEBUG_GDB
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typedef struct GDBRegisterState { |
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int base_reg;
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int num_regs;
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gdb_reg_cb get_reg; |
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gdb_reg_cb set_reg; |
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const char *xml; |
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struct GDBRegisterState *next;
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} GDBRegisterState; |
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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[MAX_PACKET_LENGTH];
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int line_buf_index;
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int line_csum;
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uint8_t last_packet[MAX_PACKET_LENGTH + 4];
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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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/* This is an ugly hack to cope with both new and old gdb.
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If gdb sends qXfer:features:read then assume we're talking to a newish
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gdb that understands target descriptions. */
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static int gdb_has_xml; |
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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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|
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/* XXX: remove this hack. */
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static GDBState gdbserver_state;
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|
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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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|
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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_binary(GDBState *s, const char *buf, int len) |
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{
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int csum, i;
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uint8_t *p; |
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for(;;) {
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p = s->last_packet; |
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*(p++) = '$';
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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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/* return -1 if error, 0 if OK */
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static int put_packet(GDBState *s, const char *buf) |
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{
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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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return put_packet_binary(s, buf, strlen(buf));
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} |
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/* The GDB remote protocol transfers values in target byte order. This means
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we can use the raw memory access routines to access the value buffer.
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Conveniently, these also handle the case where the buffer is mis-aligned.
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*/
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#define GET_REG8(val) do { \ |
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stb_p(mem_buf, val); \ |
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return 1; \ |
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} while(0) |
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#define GET_REG16(val) do { \ |
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stw_p(mem_buf, val); \ |
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return 2; \ |
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} while(0) |
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#define GET_REG32(val) do { \ |
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stl_p(mem_buf, val); \ |
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return 4; \ |
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} while(0) |
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#define GET_REG64(val) do { \ |
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stq_p(mem_buf, val); \ |
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return 8; \ |
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} while(0) |
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#if TARGET_LONG_BITS == 64 |
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#define GET_REGL(val) GET_REG64(val)
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#define ldtul_p(addr) ldq_p(addr)
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#else
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#define GET_REGL(val) GET_REG32(val)
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#define ldtul_p(addr) ldl_p(addr)
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#endif
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#if defined(TARGET_I386)
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#ifdef TARGET_X86_64
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static const int gpr_map[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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#else
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static const int gpr_map[8] = {0, 1, 2, 3, 4, 5, 6, 7}; |
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#endif
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#define NUM_CORE_REGS (CPU_NB_REGS * 2 + 25) |
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static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
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{
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if (n < CPU_NB_REGS) {
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GET_REGL(env->regs[gpr_map[n]]); |
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} else if (n >= CPU_NB_REGS + 8 && n < CPU_NB_REGS + 16) { |
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/* FIXME: byteswap float values. */
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#ifdef USE_X86LDOUBLE
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memcpy(mem_buf, &env->fpregs[n - (CPU_NB_REGS + 8)], 10); |
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#else
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memset(mem_buf, 0, 10); |
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#endif
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return 10; |
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} else if (n >= CPU_NB_REGS + 24) { |
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n -= CPU_NB_REGS + 24;
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if (n < CPU_NB_REGS) {
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stq_p(mem_buf, env->xmm_regs[n].XMM_Q(0));
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stq_p(mem_buf + 8, env->xmm_regs[n].XMM_Q(1)); |
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return 16; |
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} else if (n == CPU_NB_REGS) { |
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GET_REG32(env->mxcsr); |
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} |
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} else {
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n -= CPU_NB_REGS; |
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switch (n) {
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case 0: GET_REGL(env->eip); |
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case 1: GET_REG32(env->eflags); |
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case 2: GET_REG32(env->segs[R_CS].selector); |
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case 3: GET_REG32(env->segs[R_SS].selector); |
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case 4: GET_REG32(env->segs[R_DS].selector); |
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case 5: GET_REG32(env->segs[R_ES].selector); |
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case 6: GET_REG32(env->segs[R_FS].selector); |
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case 7: GET_REG32(env->segs[R_GS].selector); |
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/* 8...15 x87 regs. */
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case 16: GET_REG32(env->fpuc); |
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case 17: GET_REG32((env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11); |
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case 18: GET_REG32(0); /* ftag */ |
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case 19: GET_REG32(0); /* fiseg */ |
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case 20: GET_REG32(0); /* fioff */ |
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case 21: GET_REG32(0); /* foseg */ |
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case 22: GET_REG32(0); /* fooff */ |
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case 23: GET_REG32(0); /* fop */ |
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/* 24+ xmm regs. */
|
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} |
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} |
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return 0; |
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} |
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|
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static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int i) |
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{
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uint32_t tmp; |
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|
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if (i < CPU_NB_REGS) {
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env->regs[gpr_map[i]] = ldtul_p(mem_buf); |
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return sizeof(target_ulong); |
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} else if (i >= CPU_NB_REGS + 8 && i < CPU_NB_REGS + 16) { |
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i -= CPU_NB_REGS + 8;
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#ifdef USE_X86LDOUBLE
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memcpy(&env->fpregs[i], mem_buf, 10);
|
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#endif
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return 10; |
| 370 |
} else if (i >= CPU_NB_REGS + 24) { |
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i -= CPU_NB_REGS + 24;
|
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if (i < CPU_NB_REGS) {
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env->xmm_regs[i].XMM_Q(0) = ldq_p(mem_buf);
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env->xmm_regs[i].XMM_Q(1) = ldq_p(mem_buf + 8); |
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return 16; |
| 376 |
} else if (i == CPU_NB_REGS) { |
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env->mxcsr = ldl_p(mem_buf); |
| 378 |
return 4; |
| 379 |
} |
| 380 |
} else {
|
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i -= CPU_NB_REGS; |
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switch (i) {
|
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case 0: env->eip = ldtul_p(mem_buf); return sizeof(target_ulong); |
| 384 |
case 1: env->eflags = ldl_p(mem_buf); return 4; |
| 385 |
#if defined(CONFIG_USER_ONLY)
|
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#define LOAD_SEG(index, sreg)\
|
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tmp = ldl_p(mem_buf);\ |
| 388 |
if (tmp != env->segs[sreg].selector)\
|
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cpu_x86_load_seg(env, sreg, tmp); |
| 390 |
#else
|
| 391 |
/* FIXME: Honor segment registers. Needs to avoid raising an exception
|
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when the selector is invalid. */
|
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#define LOAD_SEG(index, sreg) do {} while(0) |
| 394 |
#endif
|
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case 2: LOAD_SEG(10, R_CS); return 4; |
| 396 |
case 3: LOAD_SEG(11, R_SS); return 4; |
| 397 |
case 4: LOAD_SEG(12, R_DS); return 4; |
| 398 |
case 5: LOAD_SEG(13, R_ES); return 4; |
| 399 |
case 6: LOAD_SEG(14, R_FS); return 4; |
| 400 |
case 7: LOAD_SEG(15, R_GS); return 4; |
| 401 |
/* 8...15 x87 regs. */
|
| 402 |
case 16: env->fpuc = ldl_p(mem_buf); return 4; |
| 403 |
case 17: |
| 404 |
tmp = ldl_p(mem_buf); |
| 405 |
env->fpstt = (tmp >> 11) & 7; |
| 406 |
env->fpus = tmp & ~0x3800;
|
| 407 |
return 4; |
| 408 |
case 18: /* ftag */ return 4; |
| 409 |
case 19: /* fiseg */ return 4; |
| 410 |
case 20: /* fioff */ return 4; |
| 411 |
case 21: /* foseg */ return 4; |
| 412 |
case 22: /* fooff */ return 4; |
| 413 |
case 23: /* fop */ return 4; |
| 414 |
/* 24+ xmm regs. */
|
| 415 |
} |
| 416 |
} |
| 417 |
/* Unrecognised register. */
|
| 418 |
return 0; |
| 419 |
} |
| 420 |
|
| 421 |
#elif defined (TARGET_PPC)
|
| 422 |
|
| 423 |
#define NUM_CORE_REGS 71 |
| 424 |
|
| 425 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
| 426 |
{
|
| 427 |
if (n < 32) { |
| 428 |
/* gprs */
|
| 429 |
GET_REGL(env->gpr[n]); |
| 430 |
} else if (n < 64) { |
| 431 |
/* fprs */
|
| 432 |
stfq_p(mem_buf, env->fpr[n]); |
| 433 |
return 8; |
| 434 |
} else {
|
| 435 |
switch (n) {
|
| 436 |
case 64: GET_REGL(env->nip); |
| 437 |
case 65: GET_REGL(env->msr); |
| 438 |
case 66: |
| 439 |
{
|
| 440 |
uint32_t cr = 0;
|
| 441 |
int i;
|
| 442 |
for (i = 0; i < 8; i++) |
| 443 |
cr |= env->crf[i] << (32 - ((i + 1) * 4)); |
| 444 |
GET_REG32(cr); |
| 445 |
} |
| 446 |
case 67: GET_REGL(env->lr); |
| 447 |
case 68: GET_REGL(env->ctr); |
| 448 |
case 69: GET_REGL(env->xer); |
| 449 |
case 70: GET_REG32(0); /* fpscr */ |
| 450 |
} |
| 451 |
} |
| 452 |
return 0; |
| 453 |
} |
| 454 |
|
| 455 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
| 456 |
{
|
| 457 |
if (n < 32) { |
| 458 |
/* gprs */
|
| 459 |
env->gpr[n] = ldtul_p(mem_buf); |
| 460 |
return sizeof(target_ulong); |
| 461 |
} else if (n < 64) { |
| 462 |
/* fprs */
|
| 463 |
env->fpr[n] = ldfq_p(mem_buf); |
| 464 |
return 8; |
| 465 |
} else {
|
| 466 |
switch (n) {
|
| 467 |
case 64: |
| 468 |
env->nip = ldtul_p(mem_buf); |
| 469 |
return sizeof(target_ulong); |
| 470 |
case 65: |
| 471 |
ppc_store_msr(env, ldtul_p(mem_buf)); |
| 472 |
return sizeof(target_ulong); |
| 473 |
case 66: |
| 474 |
{
|
| 475 |
uint32_t cr = ldl_p(mem_buf); |
| 476 |
int i;
|
| 477 |
for (i = 0; i < 8; i++) |
| 478 |
env->crf[i] = (cr >> (32 - ((i + 1) * 4))) & 0xF; |
| 479 |
return 4; |
| 480 |
} |
| 481 |
case 67: |
| 482 |
env->lr = ldtul_p(mem_buf); |
| 483 |
return sizeof(target_ulong); |
| 484 |
case 68: |
| 485 |
env->ctr = ldtul_p(mem_buf); |
| 486 |
return sizeof(target_ulong); |
| 487 |
case 69: |
| 488 |
env->xer = ldtul_p(mem_buf); |
| 489 |
return sizeof(target_ulong); |
| 490 |
case 70: |
| 491 |
/* fpscr */
|
| 492 |
return 4; |
| 493 |
} |
| 494 |
} |
| 495 |
return 0; |
| 496 |
} |
| 497 |
|
| 498 |
#elif defined (TARGET_SPARC)
|
| 499 |
|
| 500 |
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
|
| 501 |
#define NUM_CORE_REGS 86 |
| 502 |
#else
|
| 503 |
#define NUM_CORE_REGS 73 |
| 504 |
#endif
|
| 505 |
|
| 506 |
#ifdef TARGET_ABI32
|
| 507 |
#define GET_REGA(val) GET_REG32(val)
|
| 508 |
#else
|
| 509 |
#define GET_REGA(val) GET_REGL(val)
|
| 510 |
#endif
|
| 511 |
|
| 512 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
| 513 |
{
|
| 514 |
if (n < 8) { |
| 515 |
/* g0..g7 */
|
| 516 |
GET_REGA(env->gregs[n]); |
| 517 |
} |
| 518 |
if (n < 32) { |
| 519 |
/* register window */
|
| 520 |
GET_REGA(env->regwptr[n - 8]);
|
| 521 |
} |
| 522 |
#if defined(TARGET_ABI32) || !defined(TARGET_SPARC64)
|
| 523 |
if (n < 64) { |
| 524 |
/* fprs */
|
| 525 |
GET_REG32(*((uint32_t *)&env->fpr[n - 32]));
|
| 526 |
} |
| 527 |
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
|
| 528 |
switch (n) {
|
| 529 |
case 64: GET_REGA(env->y); |
| 530 |
case 65: GET_REGA(GET_PSR(env)); |
| 531 |
case 66: GET_REGA(env->wim); |
| 532 |
case 67: GET_REGA(env->tbr); |
| 533 |
case 68: GET_REGA(env->pc); |
| 534 |
case 69: GET_REGA(env->npc); |
| 535 |
case 70: GET_REGA(env->fsr); |
| 536 |
case 71: GET_REGA(0); /* csr */ |
| 537 |
case 72: GET_REGA(0); |
| 538 |
} |
| 539 |
#else
|
| 540 |
if (n < 64) { |
| 541 |
/* f0-f31 */
|
| 542 |
GET_REG32(*((uint32_t *)&env->fpr[n - 32]));
|
| 543 |
} |
| 544 |
if (n < 80) { |
| 545 |
/* f32-f62 (double width, even numbers only) */
|
| 546 |
uint64_t val; |
| 547 |
|
| 548 |
val = (uint64_t)*((uint32_t *)&env->fpr[(n - 64) * 2 + 32]) << 32; |
| 549 |
val |= *((uint32_t *)&env->fpr[(n - 64) * 2 + 33]); |
| 550 |
GET_REG64(val); |
| 551 |
} |
| 552 |
switch (n) {
|
| 553 |
case 80: GET_REGL(env->pc); |
| 554 |
case 81: GET_REGL(env->npc); |
| 555 |
case 82: GET_REGL(((uint64_t)GET_CCR(env) << 32) | |
| 556 |
((env->asi & 0xff) << 24) | |
| 557 |
((env->pstate & 0xfff) << 8) | |
| 558 |
GET_CWP64(env)); |
| 559 |
case 83: GET_REGL(env->fsr); |
| 560 |
case 84: GET_REGL(env->fprs); |
| 561 |
case 85: GET_REGL(env->y); |
| 562 |
} |
| 563 |
#endif
|
| 564 |
return 0; |
| 565 |
} |
| 566 |
|
| 567 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
| 568 |
{
|
| 569 |
#if defined(TARGET_ABI32)
|
| 570 |
abi_ulong tmp; |
| 571 |
|
| 572 |
tmp = ldl_p(mem_buf); |
| 573 |
#else
|
| 574 |
target_ulong tmp; |
| 575 |
|
| 576 |
tmp = ldtul_p(mem_buf); |
| 577 |
#endif
|
| 578 |
|
| 579 |
if (n < 8) { |
| 580 |
/* g0..g7 */
|
| 581 |
env->gregs[n] = tmp; |
| 582 |
} else if (n < 32) { |
| 583 |
/* register window */
|
| 584 |
env->regwptr[n - 8] = tmp;
|
| 585 |
} |
| 586 |
#if defined(TARGET_ABI32) || !defined(TARGET_SPARC64)
|
| 587 |
else if (n < 64) { |
| 588 |
/* fprs */
|
| 589 |
*((uint32_t *)&env->fpr[n - 32]) = tmp;
|
| 590 |
} else {
|
| 591 |
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
|
| 592 |
switch (n) {
|
| 593 |
case 64: env->y = tmp; break; |
| 594 |
case 65: PUT_PSR(env, tmp); break; |
| 595 |
case 66: env->wim = tmp; break; |
| 596 |
case 67: env->tbr = tmp; break; |
| 597 |
case 68: env->pc = tmp; break; |
| 598 |
case 69: env->npc = tmp; break; |
| 599 |
case 70: env->fsr = tmp; break; |
| 600 |
default: return 0; |
| 601 |
} |
| 602 |
} |
| 603 |
return 4; |
| 604 |
#else
|
| 605 |
else if (n < 64) { |
| 606 |
/* f0-f31 */
|
| 607 |
env->fpr[n] = ldfl_p(mem_buf); |
| 608 |
return 4; |
| 609 |
} else if (n < 80) { |
| 610 |
/* f32-f62 (double width, even numbers only) */
|
| 611 |
*((uint32_t *)&env->fpr[(n - 64) * 2 + 32]) = tmp >> 32; |
| 612 |
*((uint32_t *)&env->fpr[(n - 64) * 2 + 33]) = tmp; |
| 613 |
} else {
|
| 614 |
switch (n) {
|
| 615 |
case 80: env->pc = tmp; break; |
| 616 |
case 81: env->npc = tmp; break; |
| 617 |
case 82: |
| 618 |
PUT_CCR(env, tmp >> 32);
|
| 619 |
env->asi = (tmp >> 24) & 0xff; |
| 620 |
env->pstate = (tmp >> 8) & 0xfff; |
| 621 |
PUT_CWP64(env, tmp & 0xff);
|
| 622 |
break;
|
| 623 |
case 83: env->fsr = tmp; break; |
| 624 |
case 84: env->fprs = tmp; break; |
| 625 |
case 85: env->y = tmp; break; |
| 626 |
default: return 0; |
| 627 |
} |
| 628 |
} |
| 629 |
return 8; |
| 630 |
#endif
|
| 631 |
} |
| 632 |
#elif defined (TARGET_ARM)
|
| 633 |
|
| 634 |
/* Old gdb always expect FPA registers. Newer (xml-aware) gdb only expect
|
| 635 |
whatever the target description contains. Due to a historical mishap
|
| 636 |
the FPA registers appear in between core integer regs and the CPSR.
|
| 637 |
We hack round this by giving the FPA regs zero size when talking to a
|
| 638 |
newer gdb. */
|
| 639 |
#define NUM_CORE_REGS 26 |
| 640 |
#define GDB_CORE_XML "arm-core.xml" |
| 641 |
|
| 642 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
| 643 |
{
|
| 644 |
if (n < 16) { |
| 645 |
/* Core integer register. */
|
| 646 |
GET_REG32(env->regs[n]); |
| 647 |
} |
| 648 |
if (n < 24) { |
| 649 |
/* FPA registers. */
|
| 650 |
if (gdb_has_xml)
|
| 651 |
return 0; |
| 652 |
memset(mem_buf, 0, 12); |
| 653 |
return 12; |
| 654 |
} |
| 655 |
switch (n) {
|
| 656 |
case 24: |
| 657 |
/* FPA status register. */
|
| 658 |
if (gdb_has_xml)
|
| 659 |
return 0; |
| 660 |
GET_REG32(0);
|
| 661 |
case 25: |
| 662 |
/* CPSR */
|
| 663 |
GET_REG32(cpsr_read(env)); |
| 664 |
} |
| 665 |
/* Unknown register. */
|
| 666 |
return 0; |
| 667 |
} |
| 668 |
|
| 669 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
| 670 |
{
|
| 671 |
uint32_t tmp; |
| 672 |
|
| 673 |
tmp = ldl_p(mem_buf); |
| 674 |
|
| 675 |
/* Mask out low bit of PC to workaround gdb bugs. This will probably
|
| 676 |
cause problems if we ever implement the Jazelle DBX extensions. */
|
| 677 |
if (n == 15) |
| 678 |
tmp &= ~1;
|
| 679 |
|
| 680 |
if (n < 16) { |
| 681 |
/* Core integer register. */
|
| 682 |
env->regs[n] = tmp; |
| 683 |
return 4; |
| 684 |
} |
| 685 |
if (n < 24) { /* 16-23 */ |
| 686 |
/* FPA registers (ignored). */
|
| 687 |
if (gdb_has_xml)
|
| 688 |
return 0; |
| 689 |
return 12; |
| 690 |
} |
| 691 |
switch (n) {
|
| 692 |
case 24: |
| 693 |
/* FPA status register (ignored). */
|
| 694 |
if (gdb_has_xml)
|
| 695 |
return 0; |
| 696 |
return 4; |
| 697 |
case 25: |
| 698 |
/* CPSR */
|
| 699 |
cpsr_write (env, tmp, 0xffffffff);
|
| 700 |
return 4; |
| 701 |
} |
| 702 |
/* Unknown register. */
|
| 703 |
return 0; |
| 704 |
} |
| 705 |
|
| 706 |
#elif defined (TARGET_M68K)
|
| 707 |
|
| 708 |
#define NUM_CORE_REGS 18 |
| 709 |
|
| 710 |
#define GDB_CORE_XML "cf-core.xml" |
| 711 |
|
| 712 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
| 713 |
{
|
| 714 |
if (n < 8) { |
| 715 |
/* D0-D7 */
|
| 716 |
GET_REG32(env->dregs[n]); |
| 717 |
} else if (n < 16) { |
| 718 |
/* A0-A7 */
|
| 719 |
GET_REG32(env->aregs[n - 8]);
|
| 720 |
} else {
|
| 721 |
switch (n) {
|
| 722 |
case 16: GET_REG32(env->sr); |
| 723 |
case 17: GET_REG32(env->pc); |
| 724 |
} |
| 725 |
} |
| 726 |
/* FP registers not included here because they vary between
|
| 727 |
ColdFire and m68k. Use XML bits for these. */
|
| 728 |
return 0; |
| 729 |
} |
| 730 |
|
| 731 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
| 732 |
{
|
| 733 |
uint32_t tmp; |
| 734 |
|
| 735 |
tmp = ldl_p(mem_buf); |
| 736 |
|
| 737 |
if (n < 8) { |
| 738 |
/* D0-D7 */
|
| 739 |
env->dregs[n] = tmp; |
| 740 |
} else if (n < 8) { |
| 741 |
/* A0-A7 */
|
| 742 |
env->aregs[n - 8] = tmp;
|
| 743 |
} else {
|
| 744 |
switch (n) {
|
| 745 |
case 16: env->sr = tmp; break; |
| 746 |
case 17: env->pc = tmp; break; |
| 747 |
default: return 0; |
| 748 |
} |
| 749 |
} |
| 750 |
return 4; |
| 751 |
} |
| 752 |
#elif defined (TARGET_MIPS)
|
| 753 |
|
| 754 |
#define NUM_CORE_REGS 73 |
| 755 |
|
| 756 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
| 757 |
{
|
| 758 |
if (n < 32) { |
| 759 |
GET_REGL(env->active_tc.gpr[n]); |
| 760 |
} |
| 761 |
if (env->CP0_Config1 & (1 << CP0C1_FP)) { |
| 762 |
if (n >= 38 && n < 70) { |
| 763 |
if (env->CP0_Status & (1 << CP0St_FR)) |
| 764 |
GET_REGL(env->active_fpu.fpr[n - 38].d);
|
| 765 |
else
|
| 766 |
GET_REGL(env->active_fpu.fpr[n - 38].w[FP_ENDIAN_IDX]);
|
| 767 |
} |
| 768 |
switch (n) {
|
| 769 |
case 70: GET_REGL((int32_t)env->active_fpu.fcr31); |
| 770 |
case 71: GET_REGL((int32_t)env->active_fpu.fcr0); |
| 771 |
} |
| 772 |
} |
| 773 |
switch (n) {
|
| 774 |
case 32: GET_REGL((int32_t)env->CP0_Status); |
| 775 |
case 33: GET_REGL(env->active_tc.LO[0]); |
| 776 |
case 34: GET_REGL(env->active_tc.HI[0]); |
| 777 |
case 35: GET_REGL(env->CP0_BadVAddr); |
| 778 |
case 36: GET_REGL((int32_t)env->CP0_Cause); |
| 779 |
case 37: GET_REGL(env->active_tc.PC); |
| 780 |
case 72: GET_REGL(0); /* fp */ |
| 781 |
case 89: GET_REGL((int32_t)env->CP0_PRid); |
| 782 |
} |
| 783 |
if (n >= 73 && n <= 88) { |
| 784 |
/* 16 embedded regs. */
|
| 785 |
GET_REGL(0);
|
| 786 |
} |
| 787 |
|
| 788 |
return 0; |
| 789 |
} |
| 790 |
|
| 791 |
/* convert MIPS rounding mode in FCR31 to IEEE library */
|
| 792 |
static unsigned int ieee_rm[] = |
| 793 |
{
|
| 794 |
float_round_nearest_even, |
| 795 |
float_round_to_zero, |
| 796 |
float_round_up, |
| 797 |
float_round_down |
| 798 |
}; |
| 799 |
#define RESTORE_ROUNDING_MODE \
|
| 800 |
set_float_rounding_mode(ieee_rm[env->active_fpu.fcr31 & 3], &env->active_fpu.fp_status)
|
| 801 |
|
| 802 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
| 803 |
{
|
| 804 |
target_ulong tmp; |
| 805 |
|
| 806 |
tmp = ldtul_p(mem_buf); |
| 807 |
|
| 808 |
if (n < 32) { |
| 809 |
env->active_tc.gpr[n] = tmp; |
| 810 |
return sizeof(target_ulong); |
| 811 |
} |
| 812 |
if (env->CP0_Config1 & (1 << CP0C1_FP) |
| 813 |
&& n >= 38 && n < 73) { |
| 814 |
if (n < 70) { |
| 815 |
if (env->CP0_Status & (1 << CP0St_FR)) |
| 816 |
env->active_fpu.fpr[n - 38].d = tmp;
|
| 817 |
else
|
| 818 |
env->active_fpu.fpr[n - 38].w[FP_ENDIAN_IDX] = tmp;
|
| 819 |
} |
| 820 |
switch (n) {
|
| 821 |
case 70: |
| 822 |
env->active_fpu.fcr31 = tmp & 0xFF83FFFF;
|
| 823 |
/* set rounding mode */
|
| 824 |
RESTORE_ROUNDING_MODE; |
| 825 |
#ifndef CONFIG_SOFTFLOAT
|
| 826 |
/* no floating point exception for native float */
|
| 827 |
SET_FP_ENABLE(env->active_fpu.fcr31, 0);
|
| 828 |
#endif
|
| 829 |
break;
|
| 830 |
case 71: env->active_fpu.fcr0 = tmp; break; |
| 831 |
} |
| 832 |
return sizeof(target_ulong); |
| 833 |
} |
| 834 |
switch (n) {
|
| 835 |
case 32: env->CP0_Status = tmp; break; |
| 836 |
case 33: env->active_tc.LO[0] = tmp; break; |
| 837 |
case 34: env->active_tc.HI[0] = tmp; break; |
| 838 |
case 35: env->CP0_BadVAddr = tmp; break; |
| 839 |
case 36: env->CP0_Cause = tmp; break; |
| 840 |
case 37: env->active_tc.PC = tmp; break; |
| 841 |
case 72: /* fp, ignored */ break; |
| 842 |
default:
|
| 843 |
if (n > 89) |
| 844 |
return 0; |
| 845 |
/* Other registers are readonly. Ignore writes. */
|
| 846 |
break;
|
| 847 |
} |
| 848 |
|
| 849 |
return sizeof(target_ulong); |
| 850 |
} |
| 851 |
#elif defined (TARGET_SH4)
|
| 852 |
|
| 853 |
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
|
| 854 |
/* FIXME: We should use XML for this. */
|
| 855 |
|
| 856 |
#define NUM_CORE_REGS 59 |
| 857 |
|
| 858 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
| 859 |
{
|
| 860 |
if (n < 8) { |
| 861 |
if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
|
| 862 |
GET_REGL(env->gregs[n + 16]);
|
| 863 |
} else {
|
| 864 |
GET_REGL(env->gregs[n]); |
| 865 |
} |
| 866 |
} else if (n < 16) { |
| 867 |
GET_REGL(env->gregs[n - 8]);
|
| 868 |
} else if (n >= 25 && n < 41) { |
| 869 |
GET_REGL(env->fregs[(n - 25) + ((env->fpscr & FPSCR_FR) ? 16 : 0)]); |
| 870 |
} else if (n >= 43 && n < 51) { |
| 871 |
GET_REGL(env->gregs[n - 43]);
|
| 872 |
} else if (n >= 51 && n < 59) { |
| 873 |
GET_REGL(env->gregs[n - (51 - 16)]); |
| 874 |
} |
| 875 |
switch (n) {
|
| 876 |
case 16: GET_REGL(env->pc); |
| 877 |
case 17: GET_REGL(env->pr); |
| 878 |
case 18: GET_REGL(env->gbr); |
| 879 |
case 19: GET_REGL(env->vbr); |
| 880 |
case 20: GET_REGL(env->mach); |
| 881 |
case 21: GET_REGL(env->macl); |
| 882 |
case 22: GET_REGL(env->sr); |
| 883 |
case 23: GET_REGL(env->fpul); |
| 884 |
case 24: GET_REGL(env->fpscr); |
| 885 |
case 41: GET_REGL(env->ssr); |
| 886 |
case 42: GET_REGL(env->spc); |
| 887 |
} |
| 888 |
|
| 889 |
return 0; |
| 890 |
} |
| 891 |
|
| 892 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
| 893 |
{
|
| 894 |
uint32_t tmp; |
| 895 |
|
| 896 |
tmp = ldl_p(mem_buf); |
| 897 |
|
| 898 |
if (n < 8) { |
| 899 |
if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
|
| 900 |
env->gregs[n + 16] = tmp;
|
| 901 |
} else {
|
| 902 |
env->gregs[n] = tmp; |
| 903 |
} |
| 904 |
return 4; |
| 905 |
} else if (n < 16) { |
| 906 |
env->gregs[n - 8] = tmp;
|
| 907 |
return 4; |
| 908 |
} else if (n >= 25 && n < 41) { |
| 909 |
env->fregs[(n - 25) + ((env->fpscr & FPSCR_FR) ? 16 : 0)] = tmp; |
| 910 |
} else if (n >= 43 && n < 51) { |
| 911 |
env->gregs[n - 43] = tmp;
|
| 912 |
return 4; |
| 913 |
} else if (n >= 51 && n < 59) { |
| 914 |
env->gregs[n - (51 - 16)] = tmp; |
| 915 |
return 4; |
| 916 |
} |
| 917 |
switch (n) {
|
| 918 |
case 16: env->pc = tmp; |
| 919 |
case 17: env->pr = tmp; |
| 920 |
case 18: env->gbr = tmp; |
| 921 |
case 19: env->vbr = tmp; |
| 922 |
case 20: env->mach = tmp; |
| 923 |
case 21: env->macl = tmp; |
| 924 |
case 22: env->sr = tmp; |
| 925 |
case 23: env->fpul = tmp; |
| 926 |
case 24: env->fpscr = tmp; |
| 927 |
case 41: env->ssr = tmp; |
| 928 |
case 42: env->spc = tmp; |
| 929 |
default: return 0; |
| 930 |
} |
| 931 |
|
| 932 |
return 4; |
| 933 |
} |
| 934 |
#elif defined (TARGET_CRIS)
|
| 935 |
|
| 936 |
#define NUM_CORE_REGS 49 |
| 937 |
|
| 938 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
| 939 |
{
|
| 940 |
uint8_t srs; |
| 941 |
|
| 942 |
srs = env->pregs[PR_SRS]; |
| 943 |
if (n < 16) { |
| 944 |
GET_REG32(env->regs[n]); |
| 945 |
} |
| 946 |
|
| 947 |
if (n >= 21 && n < 32) { |
| 948 |
GET_REG32(env->pregs[n - 16]);
|
| 949 |
} |
| 950 |
if (n >= 33 && n < 49) { |
| 951 |
GET_REG32(env->sregs[srs][n - 33]);
|
| 952 |
} |
| 953 |
switch (n) {
|
| 954 |
case 16: GET_REG8(env->pregs[0]); |
| 955 |
case 17: GET_REG8(env->pregs[1]); |
| 956 |
case 18: GET_REG32(env->pregs[2]); |
| 957 |
case 19: GET_REG8(srs); |
| 958 |
case 20: GET_REG16(env->pregs[4]); |
| 959 |
case 32: GET_REG32(env->pc); |
| 960 |
} |
| 961 |
|
| 962 |
return 0; |
| 963 |
} |
| 964 |
|
| 965 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
| 966 |
{
|
| 967 |
uint32_t tmp; |
| 968 |
|
| 969 |
if (n > 49) |
| 970 |
return 0; |
| 971 |
|
| 972 |
tmp = ldl_p(mem_buf); |
| 973 |
|
| 974 |
if (n < 16) { |
| 975 |
env->regs[n] = tmp; |
| 976 |
} |
| 977 |
|
| 978 |
if (n >= 21 && n < 32) { |
| 979 |
env->pregs[n - 16] = tmp;
|
| 980 |
} |
| 981 |
|
| 982 |
/* FIXME: Should support function regs be writable? */
|
| 983 |
switch (n) {
|
| 984 |
case 16: return 1; |
| 985 |
case 17: return 1; |
| 986 |
case 18: env->pregs[PR_PID] = tmp; break; |
| 987 |
case 19: return 1; |
| 988 |
case 20: return 2; |
| 989 |
case 32: env->pc = tmp; break; |
| 990 |
} |
| 991 |
|
| 992 |
return 4; |
| 993 |
} |
| 994 |
#else
|
| 995 |
|
| 996 |
#define NUM_CORE_REGS 0 |
| 997 |
|
| 998 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
| 999 |
{
|
| 1000 |
return 0; |
| 1001 |
} |
| 1002 |
|
| 1003 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
| 1004 |
{
|
| 1005 |
return 0; |
| 1006 |
} |
| 1007 |
|
| 1008 |
#endif
|
| 1009 |
|
| 1010 |
static int num_g_regs = NUM_CORE_REGS; |
| 1011 |
|
| 1012 |
#ifdef GDB_CORE_XML
|
| 1013 |
/* Encode data using the encoding for 'x' packets. */
|
| 1014 |
static int memtox(char *buf, const char *mem, int len) |
| 1015 |
{
|
| 1016 |
char *p = buf;
|
| 1017 |
char c;
|
| 1018 |
|
| 1019 |
while (len--) {
|
| 1020 |
c = *(mem++); |
| 1021 |
switch (c) {
|
| 1022 |
case '#': case '$': case '*': case '}': |
| 1023 |
*(p++) = '}';
|
| 1024 |
*(p++) = c ^ 0x20;
|
| 1025 |
break;
|
| 1026 |
default:
|
| 1027 |
*(p++) = c; |
| 1028 |
break;
|
| 1029 |
} |
| 1030 |
} |
| 1031 |
return p - buf;
|
| 1032 |
} |
| 1033 |
|
| 1034 |
const char *get_feature_xml(CPUState *env, const char *p, const char **newp) |
| 1035 |
{
|
| 1036 |
extern const char *const xml_builtin[][2]; |
| 1037 |
size_t len; |
| 1038 |
int i;
|
| 1039 |
const char *name; |
| 1040 |
static char target_xml[1024]; |
| 1041 |
|
| 1042 |
len = 0;
|
| 1043 |
while (p[len] && p[len] != ':') |
| 1044 |
len++; |
| 1045 |
*newp = p + len; |
| 1046 |
|
| 1047 |
name = NULL;
|
| 1048 |
if (strncmp(p, "target.xml", len) == 0) { |
| 1049 |
/* Generate the XML description for this CPU. */
|
| 1050 |
if (!target_xml[0]) { |
| 1051 |
GDBRegisterState *r; |
| 1052 |
|
| 1053 |
snprintf(target_xml, sizeof(target_xml),
|
| 1054 |
"<?xml version=\"1.0\"?>"
|
| 1055 |
"<!DOCTYPE target SYSTEM \"gdb-target.dtd\">"
|
| 1056 |
"<target>"
|
| 1057 |
"<xi:include href=\"%s\"/>",
|
| 1058 |
GDB_CORE_XML); |
| 1059 |
|
| 1060 |
for (r = env->gdb_regs; r; r = r->next) {
|
| 1061 |
strcat(target_xml, "<xi:include href=\"");
|
| 1062 |
strcat(target_xml, r->xml); |
| 1063 |
strcat(target_xml, "\"/>");
|
| 1064 |
} |
| 1065 |
strcat(target_xml, "</target>");
|
| 1066 |
} |
| 1067 |
return target_xml;
|
| 1068 |
} |
| 1069 |
for (i = 0; ; i++) { |
| 1070 |
name = xml_builtin[i][0];
|
| 1071 |
if (!name || (strncmp(name, p, len) == 0 && strlen(name) == len)) |
| 1072 |
break;
|
| 1073 |
} |
| 1074 |
return name ? xml_builtin[i][1] : NULL; |
| 1075 |
} |
| 1076 |
#endif
|
| 1077 |
|
| 1078 |
static int gdb_read_register(CPUState *env, uint8_t *mem_buf, int reg) |
| 1079 |
{
|
| 1080 |
GDBRegisterState *r; |
| 1081 |
|
| 1082 |
if (reg < NUM_CORE_REGS)
|
| 1083 |
return cpu_gdb_read_register(env, mem_buf, reg);
|
| 1084 |
|
| 1085 |
for (r = env->gdb_regs; r; r = r->next) {
|
| 1086 |
if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) {
|
| 1087 |
return r->get_reg(env, mem_buf, reg - r->base_reg);
|
| 1088 |
} |
| 1089 |
} |
| 1090 |
return 0; |
| 1091 |
} |
| 1092 |
|
| 1093 |
static int gdb_write_register(CPUState *env, uint8_t *mem_buf, int reg) |
| 1094 |
{
|
| 1095 |
GDBRegisterState *r; |
| 1096 |
|
| 1097 |
if (reg < NUM_CORE_REGS)
|
| 1098 |
return cpu_gdb_write_register(env, mem_buf, reg);
|
| 1099 |
|
| 1100 |
for (r = env->gdb_regs; r; r = r->next) {
|
| 1101 |
if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) {
|
| 1102 |
return r->set_reg(env, mem_buf, reg - r->base_reg);
|
| 1103 |
} |
| 1104 |
} |
| 1105 |
return 0; |
| 1106 |
} |
| 1107 |
|
| 1108 |
/* Register a supplemental set of CPU registers. If g_pos is nonzero it
|
| 1109 |
specifies the first register number and these registers are included in
|
| 1110 |
a standard "g" packet. Direction is relative to gdb, i.e. get_reg is
|
| 1111 |
gdb reading a CPU register, and set_reg is gdb modifying a CPU register.
|
| 1112 |
*/
|
| 1113 |
|
| 1114 |
void gdb_register_coprocessor(CPUState * env,
|
| 1115 |
gdb_reg_cb get_reg, gdb_reg_cb set_reg, |
| 1116 |
int num_regs, const char *xml, int g_pos) |
| 1117 |
{
|
| 1118 |
GDBRegisterState *s; |
| 1119 |
GDBRegisterState **p; |
| 1120 |
static int last_reg = NUM_CORE_REGS; |
| 1121 |
|
| 1122 |
s = (GDBRegisterState *)qemu_mallocz(sizeof(GDBRegisterState));
|
| 1123 |
s->base_reg = last_reg; |
| 1124 |
s->num_regs = num_regs; |
| 1125 |
s->get_reg = get_reg; |
| 1126 |
s->set_reg = set_reg; |
| 1127 |
s->xml = xml; |
| 1128 |
p = &env->gdb_regs; |
| 1129 |
while (*p) {
|
| 1130 |
/* Check for duplicates. */
|
| 1131 |
if (strcmp((*p)->xml, xml) == 0) |
| 1132 |
return;
|
| 1133 |
p = &(*p)->next; |
| 1134 |
} |
| 1135 |
/* Add to end of list. */
|
| 1136 |
last_reg += num_regs; |
| 1137 |
*p = s; |
| 1138 |
if (g_pos) {
|
| 1139 |
if (g_pos != s->base_reg) {
|
| 1140 |
fprintf(stderr, "Error: Bad gdb register numbering for '%s'\n"
|
| 1141 |
"Expected %d got %d\n", xml, g_pos, s->base_reg);
|
| 1142 |
} else {
|
| 1143 |
num_g_regs = last_reg; |
| 1144 |
} |
| 1145 |
} |
| 1146 |
} |
| 1147 |
|
| 1148 |
/* GDB breakpoint/watchpoint types */
|
| 1149 |
#define GDB_BREAKPOINT_SW 0 |
| 1150 |
#define GDB_BREAKPOINT_HW 1 |
| 1151 |
#define GDB_WATCHPOINT_WRITE 2 |
| 1152 |
#define GDB_WATCHPOINT_READ 3 |
| 1153 |
#define GDB_WATCHPOINT_ACCESS 4 |
| 1154 |
|
| 1155 |
#ifndef CONFIG_USER_ONLY
|
| 1156 |
static const int xlat_gdb_type[] = { |
| 1157 |
[GDB_WATCHPOINT_WRITE] = BP_GDB | BP_MEM_WRITE, |
| 1158 |
[GDB_WATCHPOINT_READ] = BP_GDB | BP_MEM_READ, |
| 1159 |
[GDB_WATCHPOINT_ACCESS] = BP_GDB | BP_MEM_ACCESS, |
| 1160 |
}; |
| 1161 |
#endif
|
| 1162 |
|
| 1163 |
static int gdb_breakpoint_insert(CPUState *env, target_ulong addr, |
| 1164 |
target_ulong len, int type)
|
| 1165 |
{
|
| 1166 |
switch (type) {
|
| 1167 |
case GDB_BREAKPOINT_SW:
|
| 1168 |
case GDB_BREAKPOINT_HW:
|
| 1169 |
return cpu_breakpoint_insert(env, addr, BP_GDB, NULL); |
| 1170 |
#ifndef CONFIG_USER_ONLY
|
| 1171 |
case GDB_WATCHPOINT_WRITE:
|
| 1172 |
case GDB_WATCHPOINT_READ:
|
| 1173 |
case GDB_WATCHPOINT_ACCESS:
|
| 1174 |
return cpu_watchpoint_insert(env, addr, len, xlat_gdb_type[type],
|
| 1175 |
NULL);
|
| 1176 |
#endif
|
| 1177 |
default:
|
| 1178 |
return -ENOSYS;
|
| 1179 |
} |
| 1180 |
} |
| 1181 |
|
| 1182 |
static int gdb_breakpoint_remove(CPUState *env, target_ulong addr, |
| 1183 |
target_ulong len, int type)
|
| 1184 |
{
|
| 1185 |
switch (type) {
|
| 1186 |
case GDB_BREAKPOINT_SW:
|
| 1187 |
case GDB_BREAKPOINT_HW:
|
| 1188 |
return cpu_breakpoint_remove(env, addr, BP_GDB);
|
| 1189 |
#ifndef CONFIG_USER_ONLY
|
| 1190 |
case GDB_WATCHPOINT_WRITE:
|
| 1191 |
case GDB_WATCHPOINT_READ:
|
| 1192 |
case GDB_WATCHPOINT_ACCESS:
|
| 1193 |
return cpu_watchpoint_remove(env, addr, len, xlat_gdb_type[type]);
|
| 1194 |
#endif
|
| 1195 |
default:
|
| 1196 |
return -ENOSYS;
|
| 1197 |
} |
| 1198 |
} |
| 1199 |
|
| 1200 |
static void gdb_breakpoint_remove_all(CPUState *env) |
| 1201 |
{
|
| 1202 |
cpu_breakpoint_remove_all(env, BP_GDB); |
| 1203 |
#ifndef CONFIG_USER_ONLY
|
| 1204 |
cpu_watchpoint_remove_all(env, BP_GDB); |
| 1205 |
#endif
|
| 1206 |
} |
| 1207 |
|
| 1208 |
static int gdb_handle_packet(GDBState *s, CPUState *env, const char *line_buf) |
| 1209 |
{
|
| 1210 |
const char *p; |
| 1211 |
int ch, reg_size, type, res;
|
| 1212 |
char buf[MAX_PACKET_LENGTH];
|
| 1213 |
uint8_t mem_buf[MAX_PACKET_LENGTH]; |
| 1214 |
uint8_t *registers; |
| 1215 |
target_ulong addr, len; |
| 1216 |
|
| 1217 |
#ifdef DEBUG_GDB
|
| 1218 |
printf("command='%s'\n", line_buf);
|
| 1219 |
#endif
|
| 1220 |
p = line_buf; |
| 1221 |
ch = *p++; |
| 1222 |
switch(ch) {
|
| 1223 |
case '?': |
| 1224 |
/* TODO: Make this return the correct value for user-mode. */
|
| 1225 |
snprintf(buf, sizeof(buf), "S%02x", SIGTRAP); |
| 1226 |
put_packet(s, buf); |
| 1227 |
/* Remove all the breakpoints when this query is issued,
|
| 1228 |
* because gdb is doing and initial connect and the state
|
| 1229 |
* should be cleaned up.
|
| 1230 |
*/
|
| 1231 |
gdb_breakpoint_remove_all(env); |
| 1232 |
break;
|
| 1233 |
case 'c': |
| 1234 |
if (*p != '\0') { |
| 1235 |
addr = strtoull(p, (char **)&p, 16); |
| 1236 |
#if defined(TARGET_I386)
|
| 1237 |
env->eip = addr; |
| 1238 |
#elif defined (TARGET_PPC)
|
| 1239 |
env->nip = addr; |
| 1240 |
#elif defined (TARGET_SPARC)
|
| 1241 |
env->pc = addr; |
| 1242 |
env->npc = addr + 4;
|
| 1243 |
#elif defined (TARGET_ARM)
|
| 1244 |
env->regs[15] = addr;
|
| 1245 |
#elif defined (TARGET_SH4)
|
| 1246 |
env->pc = addr; |
| 1247 |
#elif defined (TARGET_MIPS)
|
| 1248 |
env->active_tc.PC = addr; |
| 1249 |
#elif defined (TARGET_CRIS)
|
| 1250 |
env->pc = addr; |
| 1251 |
#endif
|
| 1252 |
} |
| 1253 |
gdb_continue(s); |
| 1254 |
return RS_IDLE;
|
| 1255 |
case 'C': |
| 1256 |
s->signal = strtoul(p, (char **)&p, 16); |
| 1257 |
gdb_continue(s); |
| 1258 |
return RS_IDLE;
|
| 1259 |
case 'k': |
| 1260 |
/* Kill the target */
|
| 1261 |
fprintf(stderr, "\nQEMU: Terminated via GDBstub\n");
|
| 1262 |
exit(0);
|
| 1263 |
case 'D': |
| 1264 |
/* Detach packet */
|
| 1265 |
gdb_breakpoint_remove_all(env); |
| 1266 |
gdb_continue(s); |
| 1267 |
put_packet(s, "OK");
|
| 1268 |
break;
|
| 1269 |
case 's': |
| 1270 |
if (*p != '\0') { |
| 1271 |
addr = strtoull(p, (char **)&p, 16); |
| 1272 |
#if defined(TARGET_I386)
|
| 1273 |
env->eip = addr; |
| 1274 |
#elif defined (TARGET_PPC)
|
| 1275 |
env->nip = addr; |
| 1276 |
#elif defined (TARGET_SPARC)
|
| 1277 |
env->pc = addr; |
| 1278 |
env->npc = addr + 4;
|
| 1279 |
#elif defined (TARGET_ARM)
|
| 1280 |
env->regs[15] = addr;
|
| 1281 |
#elif defined (TARGET_SH4)
|
| 1282 |
env->pc = addr; |
| 1283 |
#elif defined (TARGET_MIPS)
|
| 1284 |
env->active_tc.PC = addr; |
| 1285 |
#elif defined (TARGET_CRIS)
|
| 1286 |
env->pc = addr; |
| 1287 |
#endif
|
| 1288 |
} |
| 1289 |
cpu_single_step(env, sstep_flags); |
| 1290 |
gdb_continue(s); |
| 1291 |
return RS_IDLE;
|
| 1292 |
case 'F': |
| 1293 |
{
|
| 1294 |
target_ulong ret; |
| 1295 |
target_ulong err; |
| 1296 |
|
| 1297 |
ret = strtoull(p, (char **)&p, 16); |
| 1298 |
if (*p == ',') { |
| 1299 |
p++; |
| 1300 |
err = strtoull(p, (char **)&p, 16); |
| 1301 |
} else {
|
| 1302 |
err = 0;
|
| 1303 |
} |
| 1304 |
if (*p == ',') |
| 1305 |
p++; |
| 1306 |
type = *p; |
| 1307 |
if (gdb_current_syscall_cb)
|
| 1308 |
gdb_current_syscall_cb(s->env, ret, err); |
| 1309 |
if (type == 'C') { |
| 1310 |
put_packet(s, "T02");
|
| 1311 |
} else {
|
| 1312 |
gdb_continue(s); |
| 1313 |
} |
| 1314 |
} |
| 1315 |
break;
|
| 1316 |
case 'g': |
| 1317 |
len = 0;
|
| 1318 |
for (addr = 0; addr < num_g_regs; addr++) { |
| 1319 |
reg_size = gdb_read_register(env, mem_buf + len, addr); |
| 1320 |
len += reg_size; |
| 1321 |
} |
| 1322 |
memtohex(buf, mem_buf, len); |
| 1323 |
put_packet(s, buf); |
| 1324 |
break;
|
| 1325 |
case 'G': |
| 1326 |
registers = mem_buf; |
| 1327 |
len = strlen(p) / 2;
|
| 1328 |
hextomem((uint8_t *)registers, p, len); |
| 1329 |
for (addr = 0; addr < num_g_regs && len > 0; addr++) { |
| 1330 |
reg_size = gdb_write_register(env, registers, addr); |
| 1331 |
len -= reg_size; |
| 1332 |
registers += reg_size; |
| 1333 |
} |
| 1334 |
put_packet(s, "OK");
|
| 1335 |
break;
|
| 1336 |
case 'm': |
| 1337 |
addr = strtoull(p, (char **)&p, 16); |
| 1338 |
if (*p == ',') |
| 1339 |
p++; |
| 1340 |
len = strtoull(p, NULL, 16); |
| 1341 |
if (cpu_memory_rw_debug(env, addr, mem_buf, len, 0) != 0) { |
| 1342 |
put_packet (s, "E14");
|
| 1343 |
} else {
|
| 1344 |
memtohex(buf, mem_buf, len); |
| 1345 |
put_packet(s, buf); |
| 1346 |
} |
| 1347 |
break;
|
| 1348 |
case 'M': |
| 1349 |
addr = strtoull(p, (char **)&p, 16); |
| 1350 |
if (*p == ',') |
| 1351 |
p++; |
| 1352 |
len = strtoull(p, (char **)&p, 16); |
| 1353 |
if (*p == ':') |
| 1354 |
p++; |
| 1355 |
hextomem(mem_buf, p, len); |
| 1356 |
if (cpu_memory_rw_debug(env, addr, mem_buf, len, 1) != 0) |
| 1357 |
put_packet(s, "E14");
|
| 1358 |
else
|
| 1359 |
put_packet(s, "OK");
|
| 1360 |
break;
|
| 1361 |
case 'p': |
| 1362 |
/* Older gdb are really dumb, and don't use 'g' if 'p' is avaialable.
|
| 1363 |
This works, but can be very slow. Anything new enough to
|
| 1364 |
understand XML also knows how to use this properly. */
|
| 1365 |
if (!gdb_has_xml)
|
| 1366 |
goto unknown_command;
|
| 1367 |
addr = strtoull(p, (char **)&p, 16); |
| 1368 |
reg_size = gdb_read_register(env, mem_buf, addr); |
| 1369 |
if (reg_size) {
|
| 1370 |
memtohex(buf, mem_buf, reg_size); |
| 1371 |
put_packet(s, buf); |
| 1372 |
} else {
|
| 1373 |
put_packet(s, "E14");
|
| 1374 |
} |
| 1375 |
break;
|
| 1376 |
case 'P': |
| 1377 |
if (!gdb_has_xml)
|
| 1378 |
goto unknown_command;
|
| 1379 |
addr = strtoull(p, (char **)&p, 16); |
| 1380 |
if (*p == '=') |
| 1381 |
p++; |
| 1382 |
reg_size = strlen(p) / 2;
|
| 1383 |
hextomem(mem_buf, p, reg_size); |
| 1384 |
gdb_write_register(env, mem_buf, addr); |
| 1385 |
put_packet(s, "OK");
|
| 1386 |
break;
|
| 1387 |
case 'Z': |
| 1388 |
case 'z': |
| 1389 |
type = strtoul(p, (char **)&p, 16); |
| 1390 |
if (*p == ',') |
| 1391 |
p++; |
| 1392 |
addr = strtoull(p, (char **)&p, 16); |
| 1393 |
if (*p == ',') |
| 1394 |
p++; |
| 1395 |
len = strtoull(p, (char **)&p, 16); |
| 1396 |
if (ch == 'Z') |
| 1397 |
res = gdb_breakpoint_insert(env, addr, len, type); |
| 1398 |
else
|
| 1399 |
res = gdb_breakpoint_remove(env, addr, len, type); |
| 1400 |
if (res >= 0) |
| 1401 |
put_packet(s, "OK");
|
| 1402 |
else if (res == -ENOSYS) |
| 1403 |
put_packet(s, "");
|
| 1404 |
else
|
| 1405 |
put_packet(s, "E22");
|
| 1406 |
break;
|
| 1407 |
case 'q': |
| 1408 |
case 'Q': |
| 1409 |
/* parse any 'q' packets here */
|
| 1410 |
if (!strcmp(p,"qemu.sstepbits")) { |
| 1411 |
/* Query Breakpoint bit definitions */
|
| 1412 |
snprintf(buf, sizeof(buf), "ENABLE=%x,NOIRQ=%x,NOTIMER=%x", |
| 1413 |
SSTEP_ENABLE, |
| 1414 |
SSTEP_NOIRQ, |
| 1415 |
SSTEP_NOTIMER); |
| 1416 |
put_packet(s, buf); |
| 1417 |
break;
|
| 1418 |
} else if (strncmp(p,"qemu.sstep",10) == 0) { |
| 1419 |
/* Display or change the sstep_flags */
|
| 1420 |
p += 10;
|
| 1421 |
if (*p != '=') { |
| 1422 |
/* Display current setting */
|
| 1423 |
snprintf(buf, sizeof(buf), "0x%x", sstep_flags); |
| 1424 |
put_packet(s, buf); |
| 1425 |
break;
|
| 1426 |
} |
| 1427 |
p++; |
| 1428 |
type = strtoul(p, (char **)&p, 16); |
| 1429 |
sstep_flags = type; |
| 1430 |
put_packet(s, "OK");
|
| 1431 |
break;
|
| 1432 |
} |
| 1433 |
#ifdef CONFIG_LINUX_USER
|
| 1434 |
else if (strncmp(p, "Offsets", 7) == 0) { |
| 1435 |
TaskState *ts = env->opaque; |
| 1436 |
|
| 1437 |
snprintf(buf, sizeof(buf),
|
| 1438 |
"Text=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx |
| 1439 |
";Bss=" TARGET_ABI_FMT_lx,
|
| 1440 |
ts->info->code_offset, |
| 1441 |
ts->info->data_offset, |
| 1442 |
ts->info->data_offset); |
| 1443 |
put_packet(s, buf); |
| 1444 |
break;
|
| 1445 |
} |
| 1446 |
#endif
|
| 1447 |
if (strncmp(p, "Supported", 9) == 0) { |
| 1448 |
snprintf(buf, sizeof(buf), "PacketSize=%x", MAX_PACKET_LENGTH); |
| 1449 |
#ifdef GDB_CORE_XML
|
| 1450 |
strcat(buf, ";qXfer:features:read+");
|
| 1451 |
#endif
|
| 1452 |
put_packet(s, buf); |
| 1453 |
break;
|
| 1454 |
} |
| 1455 |
#ifdef GDB_CORE_XML
|
| 1456 |
if (strncmp(p, "Xfer:features:read:", 19) == 0) { |
| 1457 |
const char *xml; |
| 1458 |
target_ulong total_len; |
| 1459 |
|
| 1460 |
gdb_has_xml = 1;
|
| 1461 |
p += 19;
|
| 1462 |
xml = get_feature_xml(env, p, &p); |
| 1463 |
if (!xml) {
|
| 1464 |
snprintf(buf, sizeof(buf), "E00"); |
| 1465 |
put_packet(s, buf); |
| 1466 |
break;
|
| 1467 |
} |
| 1468 |
|
| 1469 |
if (*p == ':') |
| 1470 |
p++; |
| 1471 |
addr = strtoul(p, (char **)&p, 16); |
| 1472 |
if (*p == ',') |
| 1473 |
p++; |
| 1474 |
len = strtoul(p, (char **)&p, 16); |
| 1475 |
|
| 1476 |
total_len = strlen(xml); |
| 1477 |
if (addr > total_len) {
|
| 1478 |
snprintf(buf, sizeof(buf), "E00"); |
| 1479 |
put_packet(s, buf); |
| 1480 |
break;
|
| 1481 |
} |
| 1482 |
if (len > (MAX_PACKET_LENGTH - 5) / 2) |
| 1483 |
len = (MAX_PACKET_LENGTH - 5) / 2; |
| 1484 |
if (len < total_len - addr) {
|
| 1485 |
buf[0] = 'm'; |
| 1486 |
len = memtox(buf + 1, xml + addr, len);
|
| 1487 |
} else {
|
| 1488 |
buf[0] = 'l'; |
| 1489 |
len = memtox(buf + 1, xml + addr, total_len - addr);
|
| 1490 |
} |
| 1491 |
put_packet_binary(s, buf, len + 1);
|
| 1492 |
break;
|
| 1493 |
} |
| 1494 |
#endif
|
| 1495 |
/* Unrecognised 'q' command. */
|
| 1496 |
goto unknown_command;
|
| 1497 |
|
| 1498 |
default:
|
| 1499 |
unknown_command:
|
| 1500 |
/* put empty packet */
|
| 1501 |
buf[0] = '\0'; |
| 1502 |
put_packet(s, buf); |
| 1503 |
break;
|
| 1504 |
} |
| 1505 |
return RS_IDLE;
|
| 1506 |
} |
| 1507 |
|
| 1508 |
extern void tb_flush(CPUState *env); |
| 1509 |
|
| 1510 |
#ifndef CONFIG_USER_ONLY
|
| 1511 |
static void gdb_vm_stopped(void *opaque, int reason) |
| 1512 |
{
|
| 1513 |
GDBState *s = opaque; |
| 1514 |
char buf[256]; |
| 1515 |
const char *type; |
| 1516 |
int ret;
|
| 1517 |
|
| 1518 |
if (s->state == RS_SYSCALL)
|
| 1519 |
return;
|
| 1520 |
|
| 1521 |
/* disable single step if it was enable */
|
| 1522 |
cpu_single_step(s->env, 0);
|
| 1523 |
|
| 1524 |
if (reason == EXCP_DEBUG) {
|
| 1525 |
if (s->env->watchpoint_hit) {
|
| 1526 |
switch (s->env->watchpoint_hit->flags & BP_MEM_ACCESS) {
|
| 1527 |
case BP_MEM_READ:
|
| 1528 |
type = "r";
|
| 1529 |
break;
|
| 1530 |
case BP_MEM_ACCESS:
|
| 1531 |
type = "a";
|
| 1532 |
break;
|
| 1533 |
default:
|
| 1534 |
type = "";
|
| 1535 |
break;
|
| 1536 |
} |
| 1537 |
snprintf(buf, sizeof(buf), "T%02x%swatch:" TARGET_FMT_lx ";", |
| 1538 |
SIGTRAP, type, s->env->watchpoint_hit->vaddr); |
| 1539 |
put_packet(s, buf); |
| 1540 |
s->env->watchpoint_hit = NULL;
|
| 1541 |
return;
|
| 1542 |
} |
| 1543 |
tb_flush(s->env); |
| 1544 |
ret = SIGTRAP; |
| 1545 |
} else if (reason == EXCP_INTERRUPT) { |
| 1546 |
ret = SIGINT; |
| 1547 |
} else {
|
| 1548 |
ret = 0;
|
| 1549 |
} |
| 1550 |
snprintf(buf, sizeof(buf), "S%02x", ret); |
| 1551 |
put_packet(s, buf); |
| 1552 |
} |
| 1553 |
#endif
|
| 1554 |
|
| 1555 |
/* Send a gdb syscall request.
|
| 1556 |
This accepts limited printf-style format specifiers, specifically:
|
| 1557 |
%x - target_ulong argument printed in hex.
|
| 1558 |
%lx - 64-bit argument printed in hex.
|
| 1559 |
%s - string pointer (target_ulong) and length (int) pair. */
|
| 1560 |
void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...) |
| 1561 |
{
|
| 1562 |
va_list va; |
| 1563 |
char buf[256]; |
| 1564 |
char *p;
|
| 1565 |
target_ulong addr; |
| 1566 |
uint64_t i64; |
| 1567 |
GDBState *s; |
| 1568 |
|
| 1569 |
s = gdb_syscall_state; |
| 1570 |
if (!s)
|
| 1571 |
return;
|
| 1572 |
gdb_current_syscall_cb = cb; |
| 1573 |
s->state = RS_SYSCALL; |
| 1574 |
#ifndef CONFIG_USER_ONLY
|
| 1575 |
vm_stop(EXCP_DEBUG); |
| 1576 |
#endif
|
| 1577 |
s->state = RS_IDLE; |
| 1578 |
va_start(va, fmt); |
| 1579 |
p = buf; |
| 1580 |
*(p++) = 'F';
|
| 1581 |
while (*fmt) {
|
| 1582 |
if (*fmt == '%') { |
| 1583 |
fmt++; |
| 1584 |
switch (*fmt++) {
|
| 1585 |
case 'x': |
| 1586 |
addr = va_arg(va, target_ulong); |
| 1587 |
p += snprintf(p, &buf[sizeof(buf)] - p, TARGET_FMT_lx, addr);
|
| 1588 |
break;
|
| 1589 |
case 'l': |
| 1590 |
if (*(fmt++) != 'x') |
| 1591 |
goto bad_format;
|
| 1592 |
i64 = va_arg(va, uint64_t); |
| 1593 |
p += snprintf(p, &buf[sizeof(buf)] - p, "%" PRIx64, i64); |
| 1594 |
break;
|
| 1595 |
case 's': |
| 1596 |
addr = va_arg(va, target_ulong); |
| 1597 |
p += snprintf(p, &buf[sizeof(buf)] - p, TARGET_FMT_lx "/%x", |
| 1598 |
addr, va_arg(va, int));
|
| 1599 |
break;
|
| 1600 |
default:
|
| 1601 |
bad_format:
|
| 1602 |
fprintf(stderr, "gdbstub: Bad syscall format string '%s'\n",
|
| 1603 |
fmt - 1);
|
| 1604 |
break;
|
| 1605 |
} |
| 1606 |
} else {
|
| 1607 |
*(p++) = *(fmt++); |
| 1608 |
} |
| 1609 |
} |
| 1610 |
*p = 0;
|
| 1611 |
va_end(va); |
| 1612 |
put_packet(s, buf); |
| 1613 |
#ifdef CONFIG_USER_ONLY
|
| 1614 |
gdb_handlesig(s->env, 0);
|
| 1615 |
#else
|
| 1616 |
cpu_interrupt(s->env, CPU_INTERRUPT_EXIT); |
| 1617 |
#endif
|
| 1618 |
} |
| 1619 |
|
| 1620 |
static void gdb_read_byte(GDBState *s, int ch) |
| 1621 |
{
|
| 1622 |
CPUState *env = s->env; |
| 1623 |
int i, csum;
|
| 1624 |
uint8_t reply; |
| 1625 |
|
| 1626 |
#ifndef CONFIG_USER_ONLY
|
| 1627 |
if (s->last_packet_len) {
|
| 1628 |
/* Waiting for a response to the last packet. If we see the start
|
| 1629 |
of a new command then abandon the previous response. */
|
| 1630 |
if (ch == '-') { |
| 1631 |
#ifdef DEBUG_GDB
|
| 1632 |
printf("Got NACK, retransmitting\n");
|
| 1633 |
#endif
|
| 1634 |
put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
| 1635 |
} |
| 1636 |
#ifdef DEBUG_GDB
|
| 1637 |
else if (ch == '+') |
| 1638 |
printf("Got ACK\n");
|
| 1639 |
else
|
| 1640 |
printf("Got '%c' when expecting ACK/NACK\n", ch);
|
| 1641 |
#endif
|
| 1642 |
if (ch == '+' || ch == '$') |
| 1643 |
s->last_packet_len = 0;
|
| 1644 |
if (ch != '$') |
| 1645 |
return;
|
| 1646 |
} |
| 1647 |
if (vm_running) {
|
| 1648 |
/* when the CPU is running, we cannot do anything except stop
|
| 1649 |
it when receiving a char */
|
| 1650 |
vm_stop(EXCP_INTERRUPT); |
| 1651 |
} else
|
| 1652 |
#endif
|
| 1653 |
{
|
| 1654 |
switch(s->state) {
|
| 1655 |
case RS_IDLE:
|
| 1656 |
if (ch == '$') { |
| 1657 |
s->line_buf_index = 0;
|
| 1658 |
s->state = RS_GETLINE; |
| 1659 |
} |
| 1660 |
break;
|
| 1661 |
case RS_GETLINE:
|
| 1662 |
if (ch == '#') { |
| 1663 |
s->state = RS_CHKSUM1; |
| 1664 |
} else if (s->line_buf_index >= sizeof(s->line_buf) - 1) { |
| 1665 |
s->state = RS_IDLE; |
| 1666 |
} else {
|
| 1667 |
s->line_buf[s->line_buf_index++] = ch; |
| 1668 |
} |
| 1669 |
break;
|
| 1670 |
case RS_CHKSUM1:
|
| 1671 |
s->line_buf[s->line_buf_index] = '\0';
|
| 1672 |
s->line_csum = fromhex(ch) << 4;
|
| 1673 |
s->state = RS_CHKSUM2; |
| 1674 |
break;
|
| 1675 |
case RS_CHKSUM2:
|
| 1676 |
s->line_csum |= fromhex(ch); |
| 1677 |
csum = 0;
|
| 1678 |
for(i = 0; i < s->line_buf_index; i++) { |
| 1679 |
csum += s->line_buf[i]; |
| 1680 |
} |
| 1681 |
if (s->line_csum != (csum & 0xff)) { |
| 1682 |
reply = '-';
|
| 1683 |
put_buffer(s, &reply, 1);
|
| 1684 |
s->state = RS_IDLE; |
| 1685 |
} else {
|
| 1686 |
reply = '+';
|
| 1687 |
put_buffer(s, &reply, 1);
|
| 1688 |
s->state = gdb_handle_packet(s, env, s->line_buf); |
| 1689 |
} |
| 1690 |
break;
|
| 1691 |
default:
|
| 1692 |
abort(); |
| 1693 |
} |
| 1694 |
} |
| 1695 |
} |
| 1696 |
|
| 1697 |
#ifdef CONFIG_USER_ONLY
|
| 1698 |
int
|
| 1699 |
gdb_handlesig (CPUState *env, int sig)
|
| 1700 |
{
|
| 1701 |
GDBState *s; |
| 1702 |
char buf[256]; |
| 1703 |
int n;
|
| 1704 |
|
| 1705 |
s = &gdbserver_state; |
| 1706 |
if (gdbserver_fd < 0 || s->fd < 0) |
| 1707 |
return sig;
|
| 1708 |
|
| 1709 |
/* disable single step if it was enabled */
|
| 1710 |
cpu_single_step(env, 0);
|
| 1711 |
tb_flush(env); |
| 1712 |
|
| 1713 |
if (sig != 0) |
| 1714 |
{
|
| 1715 |
snprintf(buf, sizeof(buf), "S%02x", sig); |
| 1716 |
put_packet(s, buf); |
| 1717 |
} |
| 1718 |
/* put_packet() might have detected that the peer terminated the
|
| 1719 |
connection. */
|
| 1720 |
if (s->fd < 0) |
| 1721 |
return sig;
|
| 1722 |
|
| 1723 |
sig = 0;
|
| 1724 |
s->state = RS_IDLE; |
| 1725 |
s->running_state = 0;
|
| 1726 |
while (s->running_state == 0) { |
| 1727 |
n = read (s->fd, buf, 256);
|
| 1728 |
if (n > 0) |
| 1729 |
{
|
| 1730 |
int i;
|
| 1731 |
|
| 1732 |
for (i = 0; i < n; i++) |
| 1733 |
gdb_read_byte (s, buf[i]); |
| 1734 |
} |
| 1735 |
else if (n == 0 || errno != EAGAIN) |
| 1736 |
{
|
| 1737 |
/* XXX: Connection closed. Should probably wait for annother
|
| 1738 |
connection before continuing. */
|
| 1739 |
return sig;
|
| 1740 |
} |
| 1741 |
} |
| 1742 |
sig = s->signal; |
| 1743 |
s->signal = 0;
|
| 1744 |
return sig;
|
| 1745 |
} |
| 1746 |
|
| 1747 |
/* Tell the remote gdb that the process has exited. */
|
| 1748 |
void gdb_exit(CPUState *env, int code) |
| 1749 |
{
|
| 1750 |
GDBState *s; |
| 1751 |
char buf[4]; |
| 1752 |
|
| 1753 |
s = &gdbserver_state; |
| 1754 |
if (gdbserver_fd < 0 || s->fd < 0) |
| 1755 |
return;
|
| 1756 |
|
| 1757 |
snprintf(buf, sizeof(buf), "W%02x", code); |
| 1758 |
put_packet(s, buf); |
| 1759 |
} |
| 1760 |
|
| 1761 |
|
| 1762 |
static void gdb_accept(void *opaque) |
| 1763 |
{
|
| 1764 |
GDBState *s; |
| 1765 |
struct sockaddr_in sockaddr;
|
| 1766 |
socklen_t len; |
| 1767 |
int val, fd;
|
| 1768 |
|
| 1769 |
for(;;) {
|
| 1770 |
len = sizeof(sockaddr);
|
| 1771 |
fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len);
|
| 1772 |
if (fd < 0 && errno != EINTR) { |
| 1773 |
perror("accept");
|
| 1774 |
return;
|
| 1775 |
} else if (fd >= 0) { |
| 1776 |
break;
|
| 1777 |
} |
| 1778 |
} |
| 1779 |
|
| 1780 |
/* set short latency */
|
| 1781 |
val = 1;
|
| 1782 |
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val)); |
| 1783 |
|
| 1784 |
s = &gdbserver_state; |
| 1785 |
memset (s, 0, sizeof (GDBState)); |
| 1786 |
s->env = first_cpu; /* XXX: allow to change CPU */
|
| 1787 |
s->fd = fd; |
| 1788 |
gdb_has_xml = 0;
|
| 1789 |
|
| 1790 |
gdb_syscall_state = s; |
| 1791 |
|
| 1792 |
fcntl(fd, F_SETFL, O_NONBLOCK); |
| 1793 |
} |
| 1794 |
|
| 1795 |
static int gdbserver_open(int port) |
| 1796 |
{
|
| 1797 |
struct sockaddr_in sockaddr;
|
| 1798 |
int fd, val, ret;
|
| 1799 |
|
| 1800 |
fd = socket(PF_INET, SOCK_STREAM, 0);
|
| 1801 |
if (fd < 0) { |
| 1802 |
perror("socket");
|
| 1803 |
return -1; |
| 1804 |
} |
| 1805 |
|
| 1806 |
/* allow fast reuse */
|
| 1807 |
val = 1;
|
| 1808 |
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&val, sizeof(val)); |
| 1809 |
|
| 1810 |
sockaddr.sin_family = AF_INET; |
| 1811 |
sockaddr.sin_port = htons(port); |
| 1812 |
sockaddr.sin_addr.s_addr = 0;
|
| 1813 |
ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); |
| 1814 |
if (ret < 0) { |
| 1815 |
perror("bind");
|
| 1816 |
return -1; |
| 1817 |
} |
| 1818 |
ret = listen(fd, 0);
|
| 1819 |
if (ret < 0) { |
| 1820 |
perror("listen");
|
| 1821 |
return -1; |
| 1822 |
} |
| 1823 |
return fd;
|
| 1824 |
} |
| 1825 |
|
| 1826 |
int gdbserver_start(int port) |
| 1827 |
{
|
| 1828 |
gdbserver_fd = gdbserver_open(port); |
| 1829 |
if (gdbserver_fd < 0) |
| 1830 |
return -1; |
| 1831 |
/* accept connections */
|
| 1832 |
gdb_accept (NULL);
|
| 1833 |
return 0; |
| 1834 |
} |
| 1835 |
#else
|
| 1836 |
static int gdb_chr_can_receive(void *opaque) |
| 1837 |
{
|
| 1838 |
/* We can handle an arbitrarily large amount of data.
|
| 1839 |
Pick the maximum packet size, which is as good as anything. */
|
| 1840 |
return MAX_PACKET_LENGTH;
|
| 1841 |
} |
| 1842 |
|
| 1843 |
static void gdb_chr_receive(void *opaque, const uint8_t *buf, int size) |
| 1844 |
{
|
| 1845 |
GDBState *s = opaque; |
| 1846 |
int i;
|
| 1847 |
|
| 1848 |
for (i = 0; i < size; i++) { |
| 1849 |
gdb_read_byte(s, buf[i]); |
| 1850 |
} |
| 1851 |
} |
| 1852 |
|
| 1853 |
static void gdb_chr_event(void *opaque, int event) |
| 1854 |
{
|
| 1855 |
switch (event) {
|
| 1856 |
case CHR_EVENT_RESET:
|
| 1857 |
vm_stop(EXCP_INTERRUPT); |
| 1858 |
gdb_syscall_state = opaque; |
| 1859 |
gdb_has_xml = 0;
|
| 1860 |
break;
|
| 1861 |
default:
|
| 1862 |
break;
|
| 1863 |
} |
| 1864 |
} |
| 1865 |
|
| 1866 |
int gdbserver_start(const char *port) |
| 1867 |
{
|
| 1868 |
GDBState *s; |
| 1869 |
char gdbstub_port_name[128]; |
| 1870 |
int port_num;
|
| 1871 |
char *p;
|
| 1872 |
CharDriverState *chr; |
| 1873 |
|
| 1874 |
if (!port || !*port)
|
| 1875 |
return -1; |
| 1876 |
|
| 1877 |
port_num = strtol(port, &p, 10);
|
| 1878 |
if (*p == 0) { |
| 1879 |
/* A numeric value is interpreted as a port number. */
|
| 1880 |
snprintf(gdbstub_port_name, sizeof(gdbstub_port_name),
|
| 1881 |
"tcp::%d,nowait,nodelay,server", port_num);
|
| 1882 |
port = gdbstub_port_name; |
| 1883 |
} |
| 1884 |
|
| 1885 |
chr = qemu_chr_open("gdb", port);
|
| 1886 |
if (!chr)
|
| 1887 |
return -1; |
| 1888 |
|
| 1889 |
s = qemu_mallocz(sizeof(GDBState));
|
| 1890 |
if (!s) {
|
| 1891 |
return -1; |
| 1892 |
} |
| 1893 |
s->env = first_cpu; /* XXX: allow to change CPU */
|
| 1894 |
s->chr = chr; |
| 1895 |
qemu_chr_add_handlers(chr, gdb_chr_can_receive, gdb_chr_receive, |
| 1896 |
gdb_chr_event, s); |
| 1897 |
qemu_add_vm_stop_handler(gdb_vm_stopped, s); |
| 1898 |
return 0; |
| 1899 |
} |
| 1900 |
#endif
|