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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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#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 "qemu.h" |
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#else
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#include "vl.h" |
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#endif
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <netinet/tcp.h> |
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#include <signal.h> |
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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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}; |
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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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typedef struct GDBState { |
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enum RSState state; /* parsing state */ |
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int fd;
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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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#ifdef CONFIG_USER_ONLY
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int running_state;
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#endif
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} GDBState; |
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#ifdef CONFIG_USER_ONLY
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/* XXX: remove this hack. */
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static GDBState gdbserver_state;
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#endif
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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 = read(s->fd, &ch, 1);
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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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static void put_buffer(GDBState *s, const uint8_t *buf, int len) |
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{
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int ret;
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while (len > 0) { |
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ret = write(s->fd, buf, len); |
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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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} |
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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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char buf1[3]; |
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int len, csum, ch, i;
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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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buf1[0] = '$'; |
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put_buffer(s, buf1, 1);
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len = strlen(buf); |
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put_buffer(s, buf, 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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buf1[0] = '#'; |
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buf1[1] = tohex((csum >> 4) & 0xf); |
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buf1[2] = tohex((csum) & 0xf); |
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put_buffer(s, buf1, 3);
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ch = get_char(s); |
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if (ch < 0) |
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return -1; |
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if (ch == '+') |
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break;
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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(_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(_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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_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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_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 < 7; 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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/* 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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#ifndef TARGET_SPARC64
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/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
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registers[64] = tswapl(env->y);
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{
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target_ulong tmp; |
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tmp = GET_PSR(env); |
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registers[65] = tswapl(tmp);
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} |
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registers[66] = tswapl(env->wim);
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registers[67] = tswapl(env->tbr);
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registers[68] = tswapl(env->pc);
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registers[69] = tswapl(env->npc);
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registers[70] = tswapl(env->fsr);
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registers[71] = 0; /* csr */ |
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registers[72] = 0; |
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return 73 * sizeof(target_ulong); |
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#else
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for (i = 0; i < 32; i += 2) { |
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registers[i/2 + 64] = tswapl(*((uint64_t *)&env->fpr[i])); |
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} |
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registers[81] = tswapl(env->pc);
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registers[82] = tswapl(env->npc);
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registers[83] = tswapl(env->tstate[env->tl]);
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registers[84] = tswapl(env->fsr);
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registers[85] = tswapl(env->fprs);
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registers[86] = tswapl(env->y);
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return 87 * sizeof(target_ulong); |
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#endif
|
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} |
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|
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static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
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{
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target_ulong *registers = (target_ulong *)mem_buf; |
| 345 |
int i;
|
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|
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/* fill in g0..g7 */
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for(i = 0; i < 7; i++) { |
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env->gregs[i] = tswapl(registers[i]); |
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} |
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/* fill in register window */
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for(i = 0; i < 24; i++) { |
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env->regwptr[i] = tswapl(registers[i + 8]);
|
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} |
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/* fill in fprs */
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for (i = 0; i < 32; i++) { |
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*((uint32_t *)&env->fpr[i]) = tswapl(registers[i + 32]);
|
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} |
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#ifndef TARGET_SPARC64
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/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
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env->y = tswapl(registers[64]);
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PUT_PSR(env, tswapl(registers[65]));
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env->wim = tswapl(registers[66]);
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env->tbr = tswapl(registers[67]);
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env->pc = tswapl(registers[68]);
|
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env->npc = tswapl(registers[69]);
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env->fsr = tswapl(registers[70]);
|
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#else
|
| 369 |
for (i = 0; i < 32; i += 2) { |
| 370 |
uint64_t tmp; |
| 371 |
tmp = tswapl(registers[i/2 + 64]) << 32; |
| 372 |
tmp |= tswapl(registers[i/2 + 64 + 1]); |
| 373 |
*((uint64_t *)&env->fpr[i]) = tmp; |
| 374 |
} |
| 375 |
env->pc = tswapl(registers[81]);
|
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env->npc = tswapl(registers[82]);
|
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env->tstate[env->tl] = tswapl(registers[83]);
|
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env->fsr = tswapl(registers[84]);
|
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env->fprs = tswapl(registers[85]);
|
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env->y = tswapl(registers[86]);
|
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#endif
|
| 382 |
} |
| 383 |
#elif defined (TARGET_ARM)
|
| 384 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
| 385 |
{
|
| 386 |
int i;
|
| 387 |
uint8_t *ptr; |
| 388 |
|
| 389 |
ptr = mem_buf; |
| 390 |
/* 16 core integer registers (4 bytes each). */
|
| 391 |
for (i = 0; i < 16; i++) |
| 392 |
{
|
| 393 |
*(uint32_t *)ptr = tswapl(env->regs[i]); |
| 394 |
ptr += 4;
|
| 395 |
} |
| 396 |
/* 8 FPA registers (12 bytes each), FPS (4 bytes).
|
| 397 |
Not yet implemented. */
|
| 398 |
memset (ptr, 0, 8 * 12 + 4); |
| 399 |
ptr += 8 * 12 + 4; |
| 400 |
/* CPSR (4 bytes). */
|
| 401 |
*(uint32_t *)ptr = tswapl (env->cpsr); |
| 402 |
ptr += 4;
|
| 403 |
|
| 404 |
return ptr - mem_buf;
|
| 405 |
} |
| 406 |
|
| 407 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
| 408 |
{
|
| 409 |
int i;
|
| 410 |
uint8_t *ptr; |
| 411 |
|
| 412 |
ptr = mem_buf; |
| 413 |
/* Core integer registers. */
|
| 414 |
for (i = 0; i < 16; i++) |
| 415 |
{
|
| 416 |
env->regs[i] = tswapl(*(uint32_t *)ptr); |
| 417 |
ptr += 4;
|
| 418 |
} |
| 419 |
/* Ignore FPA regs and scr. */
|
| 420 |
ptr += 8 * 12 + 4; |
| 421 |
env->cpsr = tswapl(*(uint32_t *)ptr); |
| 422 |
} |
| 423 |
#else
|
| 424 |
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
| 425 |
{
|
| 426 |
return 0; |
| 427 |
} |
| 428 |
|
| 429 |
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
| 430 |
{
|
| 431 |
} |
| 432 |
|
| 433 |
#endif
|
| 434 |
|
| 435 |
static int gdb_handle_packet(GDBState *s, CPUState *env, const char *line_buf) |
| 436 |
{
|
| 437 |
const char *p; |
| 438 |
int ch, reg_size, type;
|
| 439 |
char buf[4096]; |
| 440 |
uint8_t mem_buf[2000];
|
| 441 |
uint32_t *registers; |
| 442 |
uint32_t addr, len; |
| 443 |
|
| 444 |
#ifdef DEBUG_GDB
|
| 445 |
printf("command='%s'\n", line_buf);
|
| 446 |
#endif
|
| 447 |
p = line_buf; |
| 448 |
ch = *p++; |
| 449 |
switch(ch) {
|
| 450 |
case '?': |
| 451 |
/* TODO: Make this return the correct value for user-mode. */
|
| 452 |
snprintf(buf, sizeof(buf), "S%02x", SIGTRAP); |
| 453 |
put_packet(s, buf); |
| 454 |
break;
|
| 455 |
case 'c': |
| 456 |
if (*p != '\0') { |
| 457 |
addr = strtoul(p, (char **)&p, 16); |
| 458 |
#if defined(TARGET_I386)
|
| 459 |
env->eip = addr; |
| 460 |
#elif defined (TARGET_PPC)
|
| 461 |
env->nip = addr; |
| 462 |
#elif defined (TARGET_SPARC)
|
| 463 |
env->pc = addr; |
| 464 |
env->npc = addr + 4;
|
| 465 |
#endif
|
| 466 |
} |
| 467 |
#ifdef CONFIG_USER_ONLY
|
| 468 |
s->running_state = 1;
|
| 469 |
#else
|
| 470 |
vm_start(); |
| 471 |
#endif
|
| 472 |
return RS_IDLE;
|
| 473 |
case 's': |
| 474 |
if (*p != '\0') { |
| 475 |
addr = strtoul(p, (char **)&p, 16); |
| 476 |
#if defined(TARGET_I386)
|
| 477 |
env->eip = addr; |
| 478 |
#elif defined (TARGET_PPC)
|
| 479 |
env->nip = addr; |
| 480 |
#elif defined (TARGET_SPARC)
|
| 481 |
env->pc = addr; |
| 482 |
env->npc = addr + 4;
|
| 483 |
#endif
|
| 484 |
} |
| 485 |
cpu_single_step(env, 1);
|
| 486 |
#ifdef CONFIG_USER_ONLY
|
| 487 |
s->running_state = 1;
|
| 488 |
#else
|
| 489 |
vm_start(); |
| 490 |
#endif
|
| 491 |
return RS_IDLE;
|
| 492 |
case 'g': |
| 493 |
reg_size = cpu_gdb_read_registers(env, mem_buf); |
| 494 |
memtohex(buf, mem_buf, reg_size); |
| 495 |
put_packet(s, buf); |
| 496 |
break;
|
| 497 |
case 'G': |
| 498 |
registers = (void *)mem_buf;
|
| 499 |
len = strlen(p) / 2;
|
| 500 |
hextomem((uint8_t *)registers, p, len); |
| 501 |
cpu_gdb_write_registers(env, mem_buf, len); |
| 502 |
put_packet(s, "OK");
|
| 503 |
break;
|
| 504 |
case 'm': |
| 505 |
addr = strtoul(p, (char **)&p, 16); |
| 506 |
if (*p == ',') |
| 507 |
p++; |
| 508 |
len = strtoul(p, NULL, 16); |
| 509 |
if (cpu_memory_rw_debug(env, addr, mem_buf, len, 0) != 0) |
| 510 |
memset(mem_buf, 0, len);
|
| 511 |
memtohex(buf, mem_buf, len); |
| 512 |
put_packet(s, buf); |
| 513 |
break;
|
| 514 |
case 'M': |
| 515 |
addr = strtoul(p, (char **)&p, 16); |
| 516 |
if (*p == ',') |
| 517 |
p++; |
| 518 |
len = strtoul(p, (char **)&p, 16); |
| 519 |
if (*p == ':') |
| 520 |
p++; |
| 521 |
hextomem(mem_buf, p, len); |
| 522 |
if (cpu_memory_rw_debug(env, addr, mem_buf, len, 1) != 0) |
| 523 |
put_packet(s, "E14");
|
| 524 |
else
|
| 525 |
put_packet(s, "OK");
|
| 526 |
break;
|
| 527 |
case 'Z': |
| 528 |
type = strtoul(p, (char **)&p, 16); |
| 529 |
if (*p == ',') |
| 530 |
p++; |
| 531 |
addr = strtoul(p, (char **)&p, 16); |
| 532 |
if (*p == ',') |
| 533 |
p++; |
| 534 |
len = strtoul(p, (char **)&p, 16); |
| 535 |
if (type == 0 || type == 1) { |
| 536 |
if (cpu_breakpoint_insert(env, addr) < 0) |
| 537 |
goto breakpoint_error;
|
| 538 |
put_packet(s, "OK");
|
| 539 |
} else {
|
| 540 |
breakpoint_error:
|
| 541 |
put_packet(s, "E22");
|
| 542 |
} |
| 543 |
break;
|
| 544 |
case 'z': |
| 545 |
type = strtoul(p, (char **)&p, 16); |
| 546 |
if (*p == ',') |
| 547 |
p++; |
| 548 |
addr = strtoul(p, (char **)&p, 16); |
| 549 |
if (*p == ',') |
| 550 |
p++; |
| 551 |
len = strtoul(p, (char **)&p, 16); |
| 552 |
if (type == 0 || type == 1) { |
| 553 |
cpu_breakpoint_remove(env, addr); |
| 554 |
put_packet(s, "OK");
|
| 555 |
} else {
|
| 556 |
goto breakpoint_error;
|
| 557 |
} |
| 558 |
break;
|
| 559 |
default:
|
| 560 |
// unknown_command:
|
| 561 |
/* put empty packet */
|
| 562 |
buf[0] = '\0'; |
| 563 |
put_packet(s, buf); |
| 564 |
break;
|
| 565 |
} |
| 566 |
return RS_IDLE;
|
| 567 |
} |
| 568 |
|
| 569 |
extern void tb_flush(CPUState *env); |
| 570 |
|
| 571 |
#ifndef CONFIG_USER_ONLY
|
| 572 |
static void gdb_vm_stopped(void *opaque, int reason) |
| 573 |
{
|
| 574 |
GDBState *s = opaque; |
| 575 |
char buf[256]; |
| 576 |
int ret;
|
| 577 |
|
| 578 |
/* disable single step if it was enable */
|
| 579 |
cpu_single_step(cpu_single_env, 0);
|
| 580 |
|
| 581 |
if (reason == EXCP_DEBUG) {
|
| 582 |
tb_flush(cpu_single_env); |
| 583 |
ret = SIGTRAP; |
| 584 |
} |
| 585 |
else
|
| 586 |
ret = 0;
|
| 587 |
snprintf(buf, sizeof(buf), "S%02x", ret); |
| 588 |
put_packet(s, buf); |
| 589 |
} |
| 590 |
#endif
|
| 591 |
|
| 592 |
static void gdb_read_byte(GDBState *s, CPUState *env, int ch) |
| 593 |
{
|
| 594 |
int i, csum;
|
| 595 |
char reply[1]; |
| 596 |
|
| 597 |
#ifndef CONFIG_USER_ONLY
|
| 598 |
if (vm_running) {
|
| 599 |
/* when the CPU is running, we cannot do anything except stop
|
| 600 |
it when receiving a char */
|
| 601 |
vm_stop(EXCP_INTERRUPT); |
| 602 |
} else
|
| 603 |
#endif
|
| 604 |
{
|
| 605 |
switch(s->state) {
|
| 606 |
case RS_IDLE:
|
| 607 |
if (ch == '$') { |
| 608 |
s->line_buf_index = 0;
|
| 609 |
s->state = RS_GETLINE; |
| 610 |
} |
| 611 |
break;
|
| 612 |
case RS_GETLINE:
|
| 613 |
if (ch == '#') { |
| 614 |
s->state = RS_CHKSUM1; |
| 615 |
} else if (s->line_buf_index >= sizeof(s->line_buf) - 1) { |
| 616 |
s->state = RS_IDLE; |
| 617 |
} else {
|
| 618 |
s->line_buf[s->line_buf_index++] = ch; |
| 619 |
} |
| 620 |
break;
|
| 621 |
case RS_CHKSUM1:
|
| 622 |
s->line_buf[s->line_buf_index] = '\0';
|
| 623 |
s->line_csum = fromhex(ch) << 4;
|
| 624 |
s->state = RS_CHKSUM2; |
| 625 |
break;
|
| 626 |
case RS_CHKSUM2:
|
| 627 |
s->line_csum |= fromhex(ch); |
| 628 |
csum = 0;
|
| 629 |
for(i = 0; i < s->line_buf_index; i++) { |
| 630 |
csum += s->line_buf[i]; |
| 631 |
} |
| 632 |
if (s->line_csum != (csum & 0xff)) { |
| 633 |
reply[0] = '-'; |
| 634 |
put_buffer(s, reply, 1);
|
| 635 |
s->state = RS_IDLE; |
| 636 |
} else {
|
| 637 |
reply[0] = '+'; |
| 638 |
put_buffer(s, reply, 1);
|
| 639 |
s->state = gdb_handle_packet(s, env, s->line_buf); |
| 640 |
} |
| 641 |
break;
|
| 642 |
} |
| 643 |
} |
| 644 |
} |
| 645 |
|
| 646 |
#ifdef CONFIG_USER_ONLY
|
| 647 |
int
|
| 648 |
gdb_handlesig (CPUState *env, int sig)
|
| 649 |
{
|
| 650 |
GDBState *s; |
| 651 |
char buf[256]; |
| 652 |
int n;
|
| 653 |
|
| 654 |
if (gdbserver_fd < 0) |
| 655 |
return sig;
|
| 656 |
|
| 657 |
s = &gdbserver_state; |
| 658 |
|
| 659 |
/* disable single step if it was enabled */
|
| 660 |
cpu_single_step(env, 0);
|
| 661 |
tb_flush(env); |
| 662 |
|
| 663 |
if (sig != 0) |
| 664 |
{
|
| 665 |
snprintf(buf, sizeof(buf), "S%02x", sig); |
| 666 |
put_packet(s, buf); |
| 667 |
} |
| 668 |
|
| 669 |
sig = 0;
|
| 670 |
s->state = RS_IDLE; |
| 671 |
s->running_state = 0;
|
| 672 |
while (s->running_state == 0) { |
| 673 |
n = read (s->fd, buf, 256);
|
| 674 |
if (n > 0) |
| 675 |
{
|
| 676 |
int i;
|
| 677 |
|
| 678 |
for (i = 0; i < n; i++) |
| 679 |
gdb_read_byte (s, env, buf[i]); |
| 680 |
} |
| 681 |
else if (n == 0 || errno != EAGAIN) |
| 682 |
{
|
| 683 |
/* XXX: Connection closed. Should probably wait for annother
|
| 684 |
connection before continuing. */
|
| 685 |
return sig;
|
| 686 |
} |
| 687 |
} |
| 688 |
return sig;
|
| 689 |
} |
| 690 |
|
| 691 |
/* Tell the remote gdb that the process has exited. */
|
| 692 |
void gdb_exit(CPUState *env, int code) |
| 693 |
{
|
| 694 |
GDBState *s; |
| 695 |
char buf[4]; |
| 696 |
|
| 697 |
if (gdbserver_fd < 0) |
| 698 |
return;
|
| 699 |
|
| 700 |
s = &gdbserver_state; |
| 701 |
|
| 702 |
snprintf(buf, sizeof(buf), "W%02x", code); |
| 703 |
put_packet(s, buf); |
| 704 |
} |
| 705 |
|
| 706 |
#else
|
| 707 |
static int gdb_can_read(void *opaque) |
| 708 |
{
|
| 709 |
return 256; |
| 710 |
} |
| 711 |
|
| 712 |
static void gdb_read(void *opaque, const uint8_t *buf, int size) |
| 713 |
{
|
| 714 |
GDBState *s = opaque; |
| 715 |
int i;
|
| 716 |
if (size == 0) { |
| 717 |
/* end of connection */
|
| 718 |
qemu_del_vm_stop_handler(gdb_vm_stopped, s); |
| 719 |
qemu_del_fd_read_handler(s->fd); |
| 720 |
qemu_free(s); |
| 721 |
vm_start(); |
| 722 |
} else {
|
| 723 |
for(i = 0; i < size; i++) |
| 724 |
gdb_read_byte(s, cpu_single_env, buf[i]); |
| 725 |
} |
| 726 |
} |
| 727 |
|
| 728 |
#endif
|
| 729 |
|
| 730 |
static void gdb_accept(void *opaque, const uint8_t *buf, int size) |
| 731 |
{
|
| 732 |
GDBState *s; |
| 733 |
struct sockaddr_in sockaddr;
|
| 734 |
socklen_t len; |
| 735 |
int val, fd;
|
| 736 |
|
| 737 |
for(;;) {
|
| 738 |
len = sizeof(sockaddr);
|
| 739 |
fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len);
|
| 740 |
if (fd < 0 && errno != EINTR) { |
| 741 |
perror("accept");
|
| 742 |
return;
|
| 743 |
} else if (fd >= 0) { |
| 744 |
break;
|
| 745 |
} |
| 746 |
} |
| 747 |
|
| 748 |
/* set short latency */
|
| 749 |
val = 1;
|
| 750 |
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
|
| 751 |
|
| 752 |
#ifdef CONFIG_USER_ONLY
|
| 753 |
s = &gdbserver_state; |
| 754 |
memset (s, 0, sizeof (GDBState)); |
| 755 |
#else
|
| 756 |
s = qemu_mallocz(sizeof(GDBState));
|
| 757 |
if (!s) {
|
| 758 |
close(fd); |
| 759 |
return;
|
| 760 |
} |
| 761 |
#endif
|
| 762 |
s->fd = fd; |
| 763 |
|
| 764 |
fcntl(fd, F_SETFL, O_NONBLOCK); |
| 765 |
|
| 766 |
#ifndef CONFIG_USER_ONLY
|
| 767 |
/* stop the VM */
|
| 768 |
vm_stop(EXCP_INTERRUPT); |
| 769 |
|
| 770 |
/* start handling I/O */
|
| 771 |
qemu_add_fd_read_handler(s->fd, gdb_can_read, gdb_read, s); |
| 772 |
/* when the VM is stopped, the following callback is called */
|
| 773 |
qemu_add_vm_stop_handler(gdb_vm_stopped, s); |
| 774 |
#endif
|
| 775 |
} |
| 776 |
|
| 777 |
static int gdbserver_open(int port) |
| 778 |
{
|
| 779 |
struct sockaddr_in sockaddr;
|
| 780 |
int fd, val, ret;
|
| 781 |
|
| 782 |
fd = socket(PF_INET, SOCK_STREAM, 0);
|
| 783 |
if (fd < 0) { |
| 784 |
perror("socket");
|
| 785 |
return -1; |
| 786 |
} |
| 787 |
|
| 788 |
/* allow fast reuse */
|
| 789 |
val = 1;
|
| 790 |
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
|
| 791 |
|
| 792 |
sockaddr.sin_family = AF_INET; |
| 793 |
sockaddr.sin_port = htons(port); |
| 794 |
sockaddr.sin_addr.s_addr = 0;
|
| 795 |
ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); |
| 796 |
if (ret < 0) { |
| 797 |
perror("bind");
|
| 798 |
return -1; |
| 799 |
} |
| 800 |
ret = listen(fd, 0);
|
| 801 |
if (ret < 0) { |
| 802 |
perror("listen");
|
| 803 |
return -1; |
| 804 |
} |
| 805 |
#ifndef CONFIG_USER_ONLY
|
| 806 |
fcntl(fd, F_SETFL, O_NONBLOCK); |
| 807 |
#endif
|
| 808 |
return fd;
|
| 809 |
} |
| 810 |
|
| 811 |
int gdbserver_start(int port) |
| 812 |
{
|
| 813 |
gdbserver_fd = gdbserver_open(port); |
| 814 |
if (gdbserver_fd < 0) |
| 815 |
return -1; |
| 816 |
/* accept connections */
|
| 817 |
#ifdef CONFIG_USER_ONLY
|
| 818 |
gdb_accept (NULL, NULL, 0); |
| 819 |
#else
|
| 820 |
qemu_add_fd_read_handler(gdbserver_fd, NULL, gdb_accept, NULL); |
| 821 |
#endif
|
| 822 |
return 0; |
| 823 |
} |