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/*
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* gdb server stub
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*
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* Copyright (c) 2003-2005 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h" |
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#ifdef CONFIG_USER_ONLY
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include "qemu.h" |
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#else
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#include "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; |
363 |
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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); |
375 |
#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; |
379 |
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tmp = (uint64_t)tswap32(*((uint32_t *)&env->fpr[i])) << 32;
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tmp |= tswap32(*((uint32_t *)&env->fpr[i + 1]));
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registers[i/2 + 32] = tmp; |
383 |
} |
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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(env->tstate[env->tl]);
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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); |
391 |
#endif
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} |
393 |
|
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static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
395 |
{ |
396 |
target_ulong *registers = (target_ulong *)mem_buf; |
397 |
int i;
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398 |
|
399 |
/* fill in g0..g7 */
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400 |
for(i = 0; i < 7; i++) { |
401 |
env->gregs[i] = tswapl(registers[i]); |
402 |
} |
403 |
/* fill in register window */
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404 |
for(i = 0; i < 24; i++) { |
405 |
env->regwptr[i] = tswapl(registers[i + 8]);
|
406 |
} |
407 |
#ifndef TARGET_SPARC64
|
408 |
/* fill in fprs */
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409 |
for (i = 0; i < 32; i++) { |
410 |
*((uint32_t *)&env->fpr[i]) = tswapl(registers[i + 32]);
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} |
412 |
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
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env->y = tswapl(registers[64]);
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414 |
PUT_PSR(env, tswapl(registers[65]));
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415 |
env->wim = tswapl(registers[66]);
|
416 |
env->tbr = tswapl(registers[67]);
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417 |
env->pc = tswapl(registers[68]);
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418 |
env->npc = tswapl(registers[69]);
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419 |
env->fsr = tswapl(registers[70]);
|
420 |
#else
|
421 |
for (i = 0; i < 64; i += 2) { |
422 |
*((uint32_t *)&env->fpr[i]) = tswap32(registers[i/2 + 32] >> 32); |
423 |
*((uint32_t *)&env->fpr[i + 1]) = tswap32(registers[i/2 + 32] & 0xffffffff); |
424 |
} |
425 |
env->pc = tswapl(registers[64]);
|
426 |
env->npc = tswapl(registers[65]);
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427 |
env->tstate[env->tl] = tswapl(registers[66]);
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428 |
env->fsr = tswapl(registers[67]);
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429 |
env->fprs = tswapl(registers[68]);
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430 |
env->y = tswapl(registers[69]);
|
431 |
#endif
|
432 |
} |
433 |
#elif defined (TARGET_ARM)
|
434 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
435 |
{ |
436 |
int i;
|
437 |
uint8_t *ptr; |
438 |
|
439 |
ptr = mem_buf; |
440 |
/* 16 core integer registers (4 bytes each). */
|
441 |
for (i = 0; i < 16; i++) |
442 |
{ |
443 |
*(uint32_t *)ptr = tswapl(env->regs[i]); |
444 |
ptr += 4;
|
445 |
} |
446 |
/* 8 FPA registers (12 bytes each), FPS (4 bytes).
|
447 |
Not yet implemented. */
|
448 |
memset (ptr, 0, 8 * 12 + 4); |
449 |
ptr += 8 * 12 + 4; |
450 |
/* CPSR (4 bytes). */
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*(uint32_t *)ptr = tswapl (cpsr_read(env)); |
452 |
ptr += 4;
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453 |
|
454 |
return ptr - mem_buf;
|
455 |
} |
456 |
|
457 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
458 |
{ |
459 |
int i;
|
460 |
uint8_t *ptr; |
461 |
|
462 |
ptr = mem_buf; |
463 |
/* Core integer registers. */
|
464 |
for (i = 0; i < 16; i++) |
465 |
{ |
466 |
env->regs[i] = tswapl(*(uint32_t *)ptr); |
467 |
ptr += 4;
|
468 |
} |
469 |
/* Ignore FPA regs and scr. */
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470 |
ptr += 8 * 12 + 4; |
471 |
cpsr_write (env, tswapl(*(uint32_t *)ptr), 0xffffffff);
|
472 |
} |
473 |
#elif defined (TARGET_M68K)
|
474 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
475 |
{ |
476 |
int i;
|
477 |
uint8_t *ptr; |
478 |
CPU_DoubleU u; |
479 |
|
480 |
ptr = mem_buf; |
481 |
/* D0-D7 */
|
482 |
for (i = 0; i < 8; i++) { |
483 |
*(uint32_t *)ptr = tswapl(env->dregs[i]); |
484 |
ptr += 4;
|
485 |
} |
486 |
/* A0-A7 */
|
487 |
for (i = 0; i < 8; i++) { |
488 |
*(uint32_t *)ptr = tswapl(env->aregs[i]); |
489 |
ptr += 4;
|
490 |
} |
491 |
*(uint32_t *)ptr = tswapl(env->sr); |
492 |
ptr += 4;
|
493 |
*(uint32_t *)ptr = tswapl(env->pc); |
494 |
ptr += 4;
|
495 |
/* F0-F7. The 68881/68040 have 12-bit extended precision registers.
|
496 |
ColdFire has 8-bit double precision registers. */
|
497 |
for (i = 0; i < 8; i++) { |
498 |
u.d = env->fregs[i]; |
499 |
*(uint32_t *)ptr = tswap32(u.l.upper); |
500 |
*(uint32_t *)ptr = tswap32(u.l.lower); |
501 |
} |
502 |
/* FP control regs (not implemented). */
|
503 |
memset (ptr, 0, 3 * 4); |
504 |
ptr += 3 * 4; |
505 |
|
506 |
return ptr - mem_buf;
|
507 |
} |
508 |
|
509 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
510 |
{ |
511 |
int i;
|
512 |
uint8_t *ptr; |
513 |
CPU_DoubleU u; |
514 |
|
515 |
ptr = mem_buf; |
516 |
/* D0-D7 */
|
517 |
for (i = 0; i < 8; i++) { |
518 |
env->dregs[i] = tswapl(*(uint32_t *)ptr); |
519 |
ptr += 4;
|
520 |
} |
521 |
/* A0-A7 */
|
522 |
for (i = 0; i < 8; i++) { |
523 |
env->aregs[i] = tswapl(*(uint32_t *)ptr); |
524 |
ptr += 4;
|
525 |
} |
526 |
env->sr = tswapl(*(uint32_t *)ptr); |
527 |
ptr += 4;
|
528 |
env->pc = tswapl(*(uint32_t *)ptr); |
529 |
ptr += 4;
|
530 |
/* F0-F7. The 68881/68040 have 12-bit extended precision registers.
|
531 |
ColdFire has 8-bit double precision registers. */
|
532 |
for (i = 0; i < 8; i++) { |
533 |
u.l.upper = tswap32(*(uint32_t *)ptr); |
534 |
u.l.lower = tswap32(*(uint32_t *)ptr); |
535 |
env->fregs[i] = u.d; |
536 |
} |
537 |
/* FP control regs (not implemented). */
|
538 |
ptr += 3 * 4; |
539 |
} |
540 |
#elif defined (TARGET_MIPS)
|
541 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
542 |
{ |
543 |
int i;
|
544 |
uint8_t *ptr; |
545 |
|
546 |
ptr = mem_buf; |
547 |
for (i = 0; i < 32; i++) |
548 |
{ |
549 |
*(uint32_t *)ptr = tswapl(env->gpr[i]); |
550 |
ptr += 4;
|
551 |
} |
552 |
|
553 |
*(uint32_t *)ptr = tswapl(env->CP0_Status); |
554 |
ptr += 4;
|
555 |
|
556 |
*(uint32_t *)ptr = tswapl(env->LO); |
557 |
ptr += 4;
|
558 |
|
559 |
*(uint32_t *)ptr = tswapl(env->HI); |
560 |
ptr += 4;
|
561 |
|
562 |
*(uint32_t *)ptr = tswapl(env->CP0_BadVAddr); |
563 |
ptr += 4;
|
564 |
|
565 |
*(uint32_t *)ptr = tswapl(env->CP0_Cause); |
566 |
ptr += 4;
|
567 |
|
568 |
*(uint32_t *)ptr = tswapl(env->PC); |
569 |
ptr += 4;
|
570 |
|
571 |
if (env->CP0_Config1 & (1 << CP0C1_FP)) |
572 |
{ |
573 |
for (i = 0; i < 32; i++) |
574 |
{ |
575 |
*(uint32_t *)ptr = tswapl(FPR_W (env, i)); |
576 |
ptr += 4;
|
577 |
} |
578 |
|
579 |
*(uint32_t *)ptr = tswapl(env->fcr31); |
580 |
ptr += 4;
|
581 |
|
582 |
*(uint32_t *)ptr = tswapl(env->fcr0); |
583 |
ptr += 4;
|
584 |
} |
585 |
|
586 |
/* 32 FP registers, fsr, fir, fp. Not yet implemented. */
|
587 |
/* what's 'fp' mean here? */
|
588 |
|
589 |
return ptr - mem_buf;
|
590 |
} |
591 |
|
592 |
/* convert MIPS rounding mode in FCR31 to IEEE library */
|
593 |
static unsigned int ieee_rm[] = |
594 |
{ |
595 |
float_round_nearest_even, |
596 |
float_round_to_zero, |
597 |
float_round_up, |
598 |
float_round_down |
599 |
}; |
600 |
#define RESTORE_ROUNDING_MODE \
|
601 |
set_float_rounding_mode(ieee_rm[env->fcr31 & 3], &env->fp_status)
|
602 |
|
603 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
604 |
{ |
605 |
int i;
|
606 |
uint8_t *ptr; |
607 |
|
608 |
ptr = mem_buf; |
609 |
for (i = 0; i < 32; i++) |
610 |
{ |
611 |
env->gpr[i] = tswapl(*(uint32_t *)ptr); |
612 |
ptr += 4;
|
613 |
} |
614 |
|
615 |
env->CP0_Status = tswapl(*(uint32_t *)ptr); |
616 |
ptr += 4;
|
617 |
|
618 |
env->LO = tswapl(*(uint32_t *)ptr); |
619 |
ptr += 4;
|
620 |
|
621 |
env->HI = tswapl(*(uint32_t *)ptr); |
622 |
ptr += 4;
|
623 |
|
624 |
env->CP0_BadVAddr = tswapl(*(uint32_t *)ptr); |
625 |
ptr += 4;
|
626 |
|
627 |
env->CP0_Cause = tswapl(*(uint32_t *)ptr); |
628 |
ptr += 4;
|
629 |
|
630 |
env->PC = tswapl(*(uint32_t *)ptr); |
631 |
ptr += 4;
|
632 |
|
633 |
if (env->CP0_Config1 & (1 << CP0C1_FP)) |
634 |
{ |
635 |
for (i = 0; i < 32; i++) |
636 |
{ |
637 |
FPR_W (env, i) = tswapl(*(uint32_t *)ptr); |
638 |
ptr += 4;
|
639 |
} |
640 |
|
641 |
env->fcr31 = tswapl(*(uint32_t *)ptr) & 0x0183FFFF;
|
642 |
ptr += 4;
|
643 |
|
644 |
env->fcr0 = tswapl(*(uint32_t *)ptr); |
645 |
ptr += 4;
|
646 |
|
647 |
/* set rounding mode */
|
648 |
RESTORE_ROUNDING_MODE; |
649 |
|
650 |
#ifndef CONFIG_SOFTFLOAT
|
651 |
/* no floating point exception for native float */
|
652 |
SET_FP_ENABLE(env->fcr31, 0);
|
653 |
#endif
|
654 |
} |
655 |
} |
656 |
#elif defined (TARGET_SH4)
|
657 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
658 |
{ |
659 |
uint32_t *ptr = (uint32_t *)mem_buf; |
660 |
int i;
|
661 |
|
662 |
#define SAVE(x) *ptr++=tswapl(x)
|
663 |
if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
|
664 |
for (i = 0; i < 8; i++) SAVE(env->gregs[i + 16]); |
665 |
} else {
|
666 |
for (i = 0; i < 8; i++) SAVE(env->gregs[i]); |
667 |
} |
668 |
for (i = 8; i < 16; i++) SAVE(env->gregs[i]); |
669 |
SAVE (env->pc); |
670 |
SAVE (env->pr); |
671 |
SAVE (env->gbr); |
672 |
SAVE (env->vbr); |
673 |
SAVE (env->mach); |
674 |
SAVE (env->macl); |
675 |
SAVE (env->sr); |
676 |
SAVE (0); /* TICKS */ |
677 |
SAVE (0); /* STALLS */ |
678 |
SAVE (0); /* CYCLES */ |
679 |
SAVE (0); /* INSTS */ |
680 |
SAVE (0); /* PLR */ |
681 |
|
682 |
return ((uint8_t *)ptr - mem_buf);
|
683 |
} |
684 |
|
685 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
686 |
{ |
687 |
uint32_t *ptr = (uint32_t *)mem_buf; |
688 |
int i;
|
689 |
|
690 |
#define LOAD(x) (x)=*ptr++;
|
691 |
if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
|
692 |
for (i = 0; i < 8; i++) LOAD(env->gregs[i + 16]); |
693 |
} else {
|
694 |
for (i = 0; i < 8; i++) LOAD(env->gregs[i]); |
695 |
} |
696 |
for (i = 8; i < 16; i++) LOAD(env->gregs[i]); |
697 |
LOAD (env->pc); |
698 |
LOAD (env->pr); |
699 |
LOAD (env->gbr); |
700 |
LOAD (env->vbr); |
701 |
LOAD (env->mach); |
702 |
LOAD (env->macl); |
703 |
LOAD (env->sr); |
704 |
} |
705 |
#else
|
706 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
707 |
{ |
708 |
return 0; |
709 |
} |
710 |
|
711 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
712 |
{ |
713 |
} |
714 |
|
715 |
#endif
|
716 |
|
717 |
static int gdb_handle_packet(GDBState *s, CPUState *env, const char *line_buf) |
718 |
{ |
719 |
const char *p; |
720 |
int ch, reg_size, type;
|
721 |
char buf[4096]; |
722 |
uint8_t mem_buf[2000];
|
723 |
uint32_t *registers; |
724 |
target_ulong addr, len; |
725 |
|
726 |
#ifdef DEBUG_GDB
|
727 |
printf("command='%s'\n", line_buf);
|
728 |
#endif
|
729 |
p = line_buf; |
730 |
ch = *p++; |
731 |
switch(ch) {
|
732 |
case '?': |
733 |
/* TODO: Make this return the correct value for user-mode. */
|
734 |
snprintf(buf, sizeof(buf), "S%02x", SIGTRAP); |
735 |
put_packet(s, buf); |
736 |
break;
|
737 |
case 'c': |
738 |
if (*p != '\0') { |
739 |
addr = strtoull(p, (char **)&p, 16); |
740 |
#if defined(TARGET_I386)
|
741 |
env->eip = addr; |
742 |
#elif defined (TARGET_PPC)
|
743 |
env->nip = addr; |
744 |
#elif defined (TARGET_SPARC)
|
745 |
env->pc = addr; |
746 |
env->npc = addr + 4;
|
747 |
#elif defined (TARGET_ARM)
|
748 |
env->regs[15] = addr;
|
749 |
#elif defined (TARGET_SH4)
|
750 |
env->pc = addr; |
751 |
#endif
|
752 |
} |
753 |
#ifdef CONFIG_USER_ONLY
|
754 |
s->running_state = 1;
|
755 |
#else
|
756 |
vm_start(); |
757 |
#endif
|
758 |
return RS_IDLE;
|
759 |
case 's': |
760 |
if (*p != '\0') { |
761 |
addr = strtoul(p, (char **)&p, 16); |
762 |
#if defined(TARGET_I386)
|
763 |
env->eip = addr; |
764 |
#elif defined (TARGET_PPC)
|
765 |
env->nip = addr; |
766 |
#elif defined (TARGET_SPARC)
|
767 |
env->pc = addr; |
768 |
env->npc = addr + 4;
|
769 |
#elif defined (TARGET_ARM)
|
770 |
env->regs[15] = addr;
|
771 |
#elif defined (TARGET_SH4)
|
772 |
env->pc = addr; |
773 |
#endif
|
774 |
} |
775 |
cpu_single_step(env, 1);
|
776 |
#ifdef CONFIG_USER_ONLY
|
777 |
s->running_state = 1;
|
778 |
#else
|
779 |
vm_start(); |
780 |
#endif
|
781 |
return RS_IDLE;
|
782 |
case 'F': |
783 |
{ |
784 |
target_ulong ret; |
785 |
target_ulong err; |
786 |
|
787 |
ret = strtoull(p, (char **)&p, 16); |
788 |
if (*p == ',') { |
789 |
p++; |
790 |
err = strtoull(p, (char **)&p, 16); |
791 |
} else {
|
792 |
err = 0;
|
793 |
} |
794 |
if (*p == ',') |
795 |
p++; |
796 |
type = *p; |
797 |
if (gdb_current_syscall_cb)
|
798 |
gdb_current_syscall_cb(s->env, ret, err); |
799 |
if (type == 'C') { |
800 |
put_packet(s, "T02");
|
801 |
} else {
|
802 |
#ifdef CONFIG_USER_ONLY
|
803 |
s->running_state = 1;
|
804 |
#else
|
805 |
vm_start(); |
806 |
#endif
|
807 |
} |
808 |
} |
809 |
break;
|
810 |
case 'g': |
811 |
reg_size = cpu_gdb_read_registers(env, mem_buf); |
812 |
memtohex(buf, mem_buf, reg_size); |
813 |
put_packet(s, buf); |
814 |
break;
|
815 |
case 'G': |
816 |
registers = (void *)mem_buf;
|
817 |
len = strlen(p) / 2;
|
818 |
hextomem((uint8_t *)registers, p, len); |
819 |
cpu_gdb_write_registers(env, mem_buf, len); |
820 |
put_packet(s, "OK");
|
821 |
break;
|
822 |
case 'm': |
823 |
addr = strtoull(p, (char **)&p, 16); |
824 |
if (*p == ',') |
825 |
p++; |
826 |
len = strtoull(p, NULL, 16); |
827 |
if (cpu_memory_rw_debug(env, addr, mem_buf, len, 0) != 0) { |
828 |
put_packet (s, "E14");
|
829 |
} else {
|
830 |
memtohex(buf, mem_buf, len); |
831 |
put_packet(s, buf); |
832 |
} |
833 |
break;
|
834 |
case 'M': |
835 |
addr = strtoull(p, (char **)&p, 16); |
836 |
if (*p == ',') |
837 |
p++; |
838 |
len = strtoull(p, (char **)&p, 16); |
839 |
if (*p == ':') |
840 |
p++; |
841 |
hextomem(mem_buf, p, len); |
842 |
if (cpu_memory_rw_debug(env, addr, mem_buf, len, 1) != 0) |
843 |
put_packet(s, "E14");
|
844 |
else
|
845 |
put_packet(s, "OK");
|
846 |
break;
|
847 |
case 'Z': |
848 |
type = strtoul(p, (char **)&p, 16); |
849 |
if (*p == ',') |
850 |
p++; |
851 |
addr = strtoull(p, (char **)&p, 16); |
852 |
if (*p == ',') |
853 |
p++; |
854 |
len = strtoull(p, (char **)&p, 16); |
855 |
if (type == 0 || type == 1) { |
856 |
if (cpu_breakpoint_insert(env, addr) < 0) |
857 |
goto breakpoint_error;
|
858 |
put_packet(s, "OK");
|
859 |
#ifndef CONFIG_USER_ONLY
|
860 |
} else if (type == 2) { |
861 |
if (cpu_watchpoint_insert(env, addr) < 0) |
862 |
goto breakpoint_error;
|
863 |
put_packet(s, "OK");
|
864 |
#endif
|
865 |
} else {
|
866 |
breakpoint_error:
|
867 |
put_packet(s, "E22");
|
868 |
} |
869 |
break;
|
870 |
case 'z': |
871 |
type = strtoul(p, (char **)&p, 16); |
872 |
if (*p == ',') |
873 |
p++; |
874 |
addr = strtoull(p, (char **)&p, 16); |
875 |
if (*p == ',') |
876 |
p++; |
877 |
len = strtoull(p, (char **)&p, 16); |
878 |
if (type == 0 || type == 1) { |
879 |
cpu_breakpoint_remove(env, addr); |
880 |
put_packet(s, "OK");
|
881 |
#ifndef CONFIG_USER_ONLY
|
882 |
} else if (type == 2) { |
883 |
cpu_watchpoint_remove(env, addr); |
884 |
put_packet(s, "OK");
|
885 |
#endif
|
886 |
} else {
|
887 |
goto breakpoint_error;
|
888 |
} |
889 |
break;
|
890 |
#ifdef CONFIG_LINUX_USER
|
891 |
case 'q': |
892 |
if (strncmp(p, "Offsets", 7) == 0) { |
893 |
TaskState *ts = env->opaque; |
894 |
|
895 |
sprintf(buf, "Text=%x;Data=%x;Bss=%x", ts->info->code_offset,
|
896 |
ts->info->data_offset, ts->info->data_offset); |
897 |
put_packet(s, buf); |
898 |
break;
|
899 |
} |
900 |
/* Fall through. */
|
901 |
#endif
|
902 |
default:
|
903 |
// unknown_command:
|
904 |
/* put empty packet */
|
905 |
buf[0] = '\0'; |
906 |
put_packet(s, buf); |
907 |
break;
|
908 |
} |
909 |
return RS_IDLE;
|
910 |
} |
911 |
|
912 |
extern void tb_flush(CPUState *env); |
913 |
|
914 |
#ifndef CONFIG_USER_ONLY
|
915 |
static void gdb_vm_stopped(void *opaque, int reason) |
916 |
{ |
917 |
GDBState *s = opaque; |
918 |
char buf[256]; |
919 |
int ret;
|
920 |
|
921 |
if (s->state == RS_SYSCALL)
|
922 |
return;
|
923 |
|
924 |
/* disable single step if it was enable */
|
925 |
cpu_single_step(s->env, 0);
|
926 |
|
927 |
if (reason == EXCP_DEBUG) {
|
928 |
if (s->env->watchpoint_hit) {
|
929 |
snprintf(buf, sizeof(buf), "T%02xwatch:%x;", SIGTRAP, |
930 |
s->env->watchpoint[s->env->watchpoint_hit - 1].vaddr);
|
931 |
put_packet(s, buf); |
932 |
s->env->watchpoint_hit = 0;
|
933 |
return;
|
934 |
} |
935 |
tb_flush(s->env); |
936 |
ret = SIGTRAP; |
937 |
} else if (reason == EXCP_INTERRUPT) { |
938 |
ret = SIGINT; |
939 |
} else {
|
940 |
ret = 0;
|
941 |
} |
942 |
snprintf(buf, sizeof(buf), "S%02x", ret); |
943 |
put_packet(s, buf); |
944 |
} |
945 |
#endif
|
946 |
|
947 |
/* Send a gdb syscall request.
|
948 |
This accepts limited printf-style format specifiers, specifically:
|
949 |
%x - target_ulong argument printed in hex.
|
950 |
%s - string pointer (target_ulong) and length (int) pair. */
|
951 |
void gdb_do_syscall(gdb_syscall_complete_cb cb, char *fmt, ...) |
952 |
{ |
953 |
va_list va; |
954 |
char buf[256]; |
955 |
char *p;
|
956 |
target_ulong addr; |
957 |
GDBState *s; |
958 |
|
959 |
s = gdb_syscall_state; |
960 |
if (!s)
|
961 |
return;
|
962 |
gdb_current_syscall_cb = cb; |
963 |
s->state = RS_SYSCALL; |
964 |
#ifndef CONFIG_USER_ONLY
|
965 |
vm_stop(EXCP_DEBUG); |
966 |
#endif
|
967 |
s->state = RS_IDLE; |
968 |
va_start(va, fmt); |
969 |
p = buf; |
970 |
*(p++) = 'F';
|
971 |
while (*fmt) {
|
972 |
if (*fmt == '%') { |
973 |
fmt++; |
974 |
switch (*fmt++) {
|
975 |
case 'x': |
976 |
addr = va_arg(va, target_ulong); |
977 |
p += sprintf(p, TARGET_FMT_lx, addr); |
978 |
break;
|
979 |
case 's': |
980 |
addr = va_arg(va, target_ulong); |
981 |
p += sprintf(p, TARGET_FMT_lx "/%x", addr, va_arg(va, int)); |
982 |
break;
|
983 |
default:
|
984 |
fprintf(stderr, "gdbstub: Bad syscall format string '%s'\n",
|
985 |
fmt - 1);
|
986 |
break;
|
987 |
} |
988 |
} else {
|
989 |
*(p++) = *(fmt++); |
990 |
} |
991 |
} |
992 |
va_end(va); |
993 |
put_packet(s, buf); |
994 |
#ifdef CONFIG_USER_ONLY
|
995 |
gdb_handlesig(s->env, 0);
|
996 |
#else
|
997 |
cpu_interrupt(s->env, CPU_INTERRUPT_EXIT); |
998 |
#endif
|
999 |
} |
1000 |
|
1001 |
static void gdb_read_byte(GDBState *s, int ch) |
1002 |
{ |
1003 |
CPUState *env = s->env; |
1004 |
int i, csum;
|
1005 |
char reply[1]; |
1006 |
|
1007 |
#ifndef CONFIG_USER_ONLY
|
1008 |
if (s->last_packet_len) {
|
1009 |
/* Waiting for a response to the last packet. If we see the start
|
1010 |
of a new command then abandon the previous response. */
|
1011 |
if (ch == '-') { |
1012 |
#ifdef DEBUG_GDB
|
1013 |
printf("Got NACK, retransmitting\n");
|
1014 |
#endif
|
1015 |
put_buffer(s, s->last_packet, s->last_packet_len); |
1016 |
} |
1017 |
#ifdef DEBUG_GDB
|
1018 |
else if (ch == '+') |
1019 |
printf("Got ACK\n");
|
1020 |
else
|
1021 |
printf("Got '%c' when expecting ACK/NACK\n", ch);
|
1022 |
#endif
|
1023 |
if (ch == '+' || ch == '$') |
1024 |
s->last_packet_len = 0;
|
1025 |
if (ch != '$') |
1026 |
return;
|
1027 |
} |
1028 |
if (vm_running) {
|
1029 |
/* when the CPU is running, we cannot do anything except stop
|
1030 |
it when receiving a char */
|
1031 |
vm_stop(EXCP_INTERRUPT); |
1032 |
} else
|
1033 |
#endif
|
1034 |
{ |
1035 |
switch(s->state) {
|
1036 |
case RS_IDLE:
|
1037 |
if (ch == '$') { |
1038 |
s->line_buf_index = 0;
|
1039 |
s->state = RS_GETLINE; |
1040 |
} |
1041 |
break;
|
1042 |
case RS_GETLINE:
|
1043 |
if (ch == '#') { |
1044 |
s->state = RS_CHKSUM1; |
1045 |
} else if (s->line_buf_index >= sizeof(s->line_buf) - 1) { |
1046 |
s->state = RS_IDLE; |
1047 |
} else {
|
1048 |
s->line_buf[s->line_buf_index++] = ch; |
1049 |
} |
1050 |
break;
|
1051 |
case RS_CHKSUM1:
|
1052 |
s->line_buf[s->line_buf_index] = '\0';
|
1053 |
s->line_csum = fromhex(ch) << 4;
|
1054 |
s->state = RS_CHKSUM2; |
1055 |
break;
|
1056 |
case RS_CHKSUM2:
|
1057 |
s->line_csum |= fromhex(ch); |
1058 |
csum = 0;
|
1059 |
for(i = 0; i < s->line_buf_index; i++) { |
1060 |
csum += s->line_buf[i]; |
1061 |
} |
1062 |
if (s->line_csum != (csum & 0xff)) { |
1063 |
reply[0] = '-'; |
1064 |
put_buffer(s, reply, 1);
|
1065 |
s->state = RS_IDLE; |
1066 |
} else {
|
1067 |
reply[0] = '+'; |
1068 |
put_buffer(s, reply, 1);
|
1069 |
s->state = gdb_handle_packet(s, env, s->line_buf); |
1070 |
} |
1071 |
break;
|
1072 |
default:
|
1073 |
abort(); |
1074 |
} |
1075 |
} |
1076 |
} |
1077 |
|
1078 |
#ifdef CONFIG_USER_ONLY
|
1079 |
int
|
1080 |
gdb_handlesig (CPUState *env, int sig)
|
1081 |
{ |
1082 |
GDBState *s; |
1083 |
char buf[256]; |
1084 |
int n;
|
1085 |
|
1086 |
if (gdbserver_fd < 0) |
1087 |
return sig;
|
1088 |
|
1089 |
s = &gdbserver_state; |
1090 |
|
1091 |
/* disable single step if it was enabled */
|
1092 |
cpu_single_step(env, 0);
|
1093 |
tb_flush(env); |
1094 |
|
1095 |
if (sig != 0) |
1096 |
{ |
1097 |
snprintf(buf, sizeof(buf), "S%02x", sig); |
1098 |
put_packet(s, buf); |
1099 |
} |
1100 |
|
1101 |
sig = 0;
|
1102 |
s->state = RS_IDLE; |
1103 |
s->running_state = 0;
|
1104 |
while (s->running_state == 0) { |
1105 |
n = read (s->fd, buf, 256);
|
1106 |
if (n > 0) |
1107 |
{ |
1108 |
int i;
|
1109 |
|
1110 |
for (i = 0; i < n; i++) |
1111 |
gdb_read_byte (s, buf[i]); |
1112 |
} |
1113 |
else if (n == 0 || errno != EAGAIN) |
1114 |
{ |
1115 |
/* XXX: Connection closed. Should probably wait for annother
|
1116 |
connection before continuing. */
|
1117 |
return sig;
|
1118 |
} |
1119 |
} |
1120 |
return sig;
|
1121 |
} |
1122 |
|
1123 |
/* Tell the remote gdb that the process has exited. */
|
1124 |
void gdb_exit(CPUState *env, int code) |
1125 |
{ |
1126 |
GDBState *s; |
1127 |
char buf[4]; |
1128 |
|
1129 |
if (gdbserver_fd < 0) |
1130 |
return;
|
1131 |
|
1132 |
s = &gdbserver_state; |
1133 |
|
1134 |
snprintf(buf, sizeof(buf), "W%02x", code); |
1135 |
put_packet(s, buf); |
1136 |
} |
1137 |
|
1138 |
|
1139 |
static void gdb_accept(void *opaque) |
1140 |
{ |
1141 |
GDBState *s; |
1142 |
struct sockaddr_in sockaddr;
|
1143 |
socklen_t len; |
1144 |
int val, fd;
|
1145 |
|
1146 |
for(;;) {
|
1147 |
len = sizeof(sockaddr);
|
1148 |
fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len);
|
1149 |
if (fd < 0 && errno != EINTR) { |
1150 |
perror("accept");
|
1151 |
return;
|
1152 |
} else if (fd >= 0) { |
1153 |
break;
|
1154 |
} |
1155 |
} |
1156 |
|
1157 |
/* set short latency */
|
1158 |
val = 1;
|
1159 |
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val)); |
1160 |
|
1161 |
s = &gdbserver_state; |
1162 |
memset (s, 0, sizeof (GDBState)); |
1163 |
s->env = first_cpu; /* XXX: allow to change CPU */
|
1164 |
s->fd = fd; |
1165 |
|
1166 |
gdb_syscall_state = s; |
1167 |
|
1168 |
fcntl(fd, F_SETFL, O_NONBLOCK); |
1169 |
} |
1170 |
|
1171 |
static int gdbserver_open(int port) |
1172 |
{ |
1173 |
struct sockaddr_in sockaddr;
|
1174 |
int fd, val, ret;
|
1175 |
|
1176 |
fd = socket(PF_INET, SOCK_STREAM, 0);
|
1177 |
if (fd < 0) { |
1178 |
perror("socket");
|
1179 |
return -1; |
1180 |
} |
1181 |
|
1182 |
/* allow fast reuse */
|
1183 |
val = 1;
|
1184 |
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&val, sizeof(val)); |
1185 |
|
1186 |
sockaddr.sin_family = AF_INET; |
1187 |
sockaddr.sin_port = htons(port); |
1188 |
sockaddr.sin_addr.s_addr = 0;
|
1189 |
ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); |
1190 |
if (ret < 0) { |
1191 |
perror("bind");
|
1192 |
return -1; |
1193 |
} |
1194 |
ret = listen(fd, 0);
|
1195 |
if (ret < 0) { |
1196 |
perror("listen");
|
1197 |
return -1; |
1198 |
} |
1199 |
return fd;
|
1200 |
} |
1201 |
|
1202 |
int gdbserver_start(int port) |
1203 |
{ |
1204 |
gdbserver_fd = gdbserver_open(port); |
1205 |
if (gdbserver_fd < 0) |
1206 |
return -1; |
1207 |
/* accept connections */
|
1208 |
gdb_accept (NULL);
|
1209 |
return 0; |
1210 |
} |
1211 |
#else
|
1212 |
static int gdb_chr_can_recieve(void *opaque) |
1213 |
{ |
1214 |
return 1; |
1215 |
} |
1216 |
|
1217 |
static void gdb_chr_recieve(void *opaque, const uint8_t *buf, int size) |
1218 |
{ |
1219 |
GDBState *s = opaque; |
1220 |
int i;
|
1221 |
|
1222 |
for (i = 0; i < size; i++) { |
1223 |
gdb_read_byte(s, buf[i]); |
1224 |
} |
1225 |
} |
1226 |
|
1227 |
static void gdb_chr_event(void *opaque, int event) |
1228 |
{ |
1229 |
switch (event) {
|
1230 |
case CHR_EVENT_RESET:
|
1231 |
vm_stop(EXCP_INTERRUPT); |
1232 |
gdb_syscall_state = opaque; |
1233 |
break;
|
1234 |
default:
|
1235 |
break;
|
1236 |
} |
1237 |
} |
1238 |
|
1239 |
int gdbserver_start(const char *port) |
1240 |
{ |
1241 |
GDBState *s; |
1242 |
char gdbstub_port_name[128]; |
1243 |
int port_num;
|
1244 |
char *p;
|
1245 |
CharDriverState *chr; |
1246 |
|
1247 |
if (!port || !*port)
|
1248 |
return -1; |
1249 |
|
1250 |
port_num = strtol(port, &p, 10);
|
1251 |
if (*p == 0) { |
1252 |
/* A numeric value is interpreted as a port number. */
|
1253 |
snprintf(gdbstub_port_name, sizeof(gdbstub_port_name),
|
1254 |
"tcp::%d,nowait,nodelay,server", port_num);
|
1255 |
port = gdbstub_port_name; |
1256 |
} |
1257 |
|
1258 |
chr = qemu_chr_open(port); |
1259 |
if (!chr)
|
1260 |
return -1; |
1261 |
|
1262 |
s = qemu_mallocz(sizeof(GDBState));
|
1263 |
if (!s) {
|
1264 |
return -1; |
1265 |
} |
1266 |
s->env = first_cpu; /* XXX: allow to change CPU */
|
1267 |
s->chr = chr; |
1268 |
qemu_chr_add_handlers(chr, gdb_chr_can_recieve, gdb_chr_recieve, |
1269 |
gdb_chr_event, s); |
1270 |
qemu_add_vm_stop_handler(gdb_vm_stopped, s); |
1271 |
return 0; |
1272 |
} |
1273 |
#endif
|