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gdbstub.c
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gdbstub.c
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/*
* gdb server stub
*
* Copyright (c) 2003-2005 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#ifdef CONFIG_USER_ONLY
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include "qemu.h"
#else
#include "qemu-common.h"
#include "qemu-char.h"
#include "sysemu.h"
#include "gdbstub.h"
#endif
#include "qemu_socket.h"
#ifdef _WIN32
/* XXX: these constants may be independent of the host ones even for Unix */
#ifndef SIGTRAP
#define SIGTRAP 5
#endif
#ifndef SIGINT
#define SIGINT 2
#endif
#else
#include <signal.h>
#endif
//#define DEBUG_GDB
enum RSState {
RS_IDLE,
RS_GETLINE,
RS_CHKSUM1,
RS_CHKSUM2,
RS_SYSCALL,
};
typedef struct GDBState {
CPUState *env; /* current CPU */
enum RSState state; /* parsing state */
char line_buf[4096];
int line_buf_index;
int line_csum;
uint8_t last_packet[4100];
int last_packet_len;
#ifdef CONFIG_USER_ONLY
int fd;
int running_state;
#else
CharDriverState *chr;
#endif
} GDBState;
#ifdef CONFIG_USER_ONLY
/* XXX: This is not thread safe. Do we care? */
static int gdbserver_fd = -1;
/* XXX: remove this hack. */
static GDBState gdbserver_state;
static int get_char(GDBState *s)
{
uint8_t ch;
int ret;
for(;;) {
ret = recv(s->fd, &ch, 1, 0);
if (ret < 0) {
if (errno != EINTR && errno != EAGAIN)
return -1;
} else if (ret == 0) {
return -1;
} else {
break;
}
}
return ch;
}
#endif
/* GDB stub state for use by semihosting syscalls. */
static GDBState *gdb_syscall_state;
static gdb_syscall_complete_cb gdb_current_syscall_cb;
enum {
GDB_SYS_UNKNOWN,
GDB_SYS_ENABLED,
GDB_SYS_DISABLED,
} gdb_syscall_mode;
/* If gdb is connected when the first semihosting syscall occurs then use
remote gdb syscalls. Otherwise use native file IO. */
int use_gdb_syscalls(void)
{
if (gdb_syscall_mode == GDB_SYS_UNKNOWN) {
gdb_syscall_mode = (gdb_syscall_state ? GDB_SYS_ENABLED
: GDB_SYS_DISABLED);
}
return gdb_syscall_mode == GDB_SYS_ENABLED;
}
static void put_buffer(GDBState *s, const uint8_t *buf, int len)
{
#ifdef CONFIG_USER_ONLY
int ret;
while (len > 0) {
ret = send(s->fd, buf, len, 0);
if (ret < 0) {
if (errno != EINTR && errno != EAGAIN)
return;
} else {
buf += ret;
len -= ret;
}
}
#else
qemu_chr_write(s->chr, buf, len);
#endif
}
static inline int fromhex(int v)
{
if (v >= '0' && v <= '9')
return v - '0';
else if (v >= 'A' && v <= 'F')
return v - 'A' + 10;
else if (v >= 'a' && v <= 'f')
return v - 'a' + 10;
else
return 0;
}
static inline int tohex(int v)
{
if (v < 10)
return v + '0';
else
return v - 10 + 'a';
}
static void memtohex(char *buf, const uint8_t *mem, int len)
{
int i, c;
char *q;
q = buf;
for(i = 0; i < len; i++) {
c = mem[i];
*q++ = tohex(c >> 4);
*q++ = tohex(c & 0xf);
}
*q = '\0';
}
static void hextomem(uint8_t *mem, const char *buf, int len)
{
int i;
for(i = 0; i < len; i++) {
mem[i] = (fromhex(buf[0]) << 4) | fromhex(buf[1]);
buf += 2;
}
}
/* return -1 if error, 0 if OK */
static int put_packet(GDBState *s, char *buf)
{
int len, csum, i;
uint8_t *p;
#ifdef DEBUG_GDB
printf("reply='%s'\n", buf);
#endif
for(;;) {
p = s->last_packet;
*(p++) = '$';
len = strlen(buf);
memcpy(p, buf, len);
p += len;
csum = 0;
for(i = 0; i < len; i++) {
csum += buf[i];
}
*(p++) = '#';
*(p++) = tohex((csum >> 4) & 0xf);
*(p++) = tohex((csum) & 0xf);
s->last_packet_len = p - s->last_packet;
put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len);
#ifdef CONFIG_USER_ONLY
i = get_char(s);
if (i < 0)
return -1;
if (i == '+')
break;
#else
break;
#endif
}
return 0;
}
#if defined(TARGET_I386)
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
int i, fpus;
uint32_t *registers = (uint32_t *)mem_buf;
#ifdef TARGET_X86_64
/* This corresponds with amd64_register_info[] in gdb/amd64-tdep.c */
uint64_t *registers64 = (uint64_t *)mem_buf;
if (env->hflags & HF_CS64_MASK) {
registers64[0] = tswap64(env->regs[R_EAX]);
registers64[1] = tswap64(env->regs[R_EBX]);
registers64[2] = tswap64(env->regs[R_ECX]);
registers64[3] = tswap64(env->regs[R_EDX]);
registers64[4] = tswap64(env->regs[R_ESI]);
registers64[5] = tswap64(env->regs[R_EDI]);
registers64[6] = tswap64(env->regs[R_EBP]);
registers64[7] = tswap64(env->regs[R_ESP]);
for(i = 8; i < 16; i++) {
registers64[i] = tswap64(env->regs[i]);
}
registers64[16] = tswap64(env->eip);
registers = (uint32_t *)®isters64[17];
registers[0] = tswap32(env->eflags);
registers[1] = tswap32(env->segs[R_CS].selector);
registers[2] = tswap32(env->segs[R_SS].selector);
registers[3] = tswap32(env->segs[R_DS].selector);
registers[4] = tswap32(env->segs[R_ES].selector);
registers[5] = tswap32(env->segs[R_FS].selector);
registers[6] = tswap32(env->segs[R_GS].selector);
/* XXX: convert floats */
for(i = 0; i < 8; i++) {
memcpy(mem_buf + 16 * 8 + 7 * 4 + i * 10, &env->fpregs[i], 10);
}
registers[27] = tswap32(env->fpuc); /* fctrl */
fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
registers[28] = tswap32(fpus); /* fstat */
registers[29] = 0; /* ftag */
registers[30] = 0; /* fiseg */
registers[31] = 0; /* fioff */
registers[32] = 0; /* foseg */
registers[33] = 0; /* fooff */
registers[34] = 0; /* fop */
for(i = 0; i < 16; i++) {
memcpy(mem_buf + 16 * 8 + 35 * 4 + i * 16, &env->xmm_regs[i], 16);
}
registers[99] = tswap32(env->mxcsr);
return 8 * 17 + 4 * 7 + 10 * 8 + 4 * 8 + 16 * 16 + 4;
}
#endif
for(i = 0; i < 8; i++) {
registers[i] = env->regs[i];
}
registers[8] = env->eip;
registers[9] = env->eflags;
registers[10] = env->segs[R_CS].selector;
registers[11] = env->segs[R_SS].selector;
registers[12] = env->segs[R_DS].selector;
registers[13] = env->segs[R_ES].selector;
registers[14] = env->segs[R_FS].selector;
registers[15] = env->segs[R_GS].selector;
/* XXX: convert floats */
for(i = 0; i < 8; i++) {
memcpy(mem_buf + 16 * 4 + i * 10, &env->fpregs[i], 10);
}
registers[36] = env->fpuc;
fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
registers[37] = fpus;
registers[38] = 0; /* XXX: convert tags */
registers[39] = 0; /* fiseg */
registers[40] = 0; /* fioff */
registers[41] = 0; /* foseg */
registers[42] = 0; /* fooff */
registers[43] = 0; /* fop */
for(i = 0; i < 16; i++)
tswapls(®isters[i]);
for(i = 36; i < 44; i++)
tswapls(®isters[i]);
return 44 * 4;
}
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
{
uint32_t *registers = (uint32_t *)mem_buf;
int i;
for(i = 0; i < 8; i++) {
env->regs[i] = tswapl(registers[i]);
}
env->eip = tswapl(registers[8]);
env->eflags = tswapl(registers[9]);
#if defined(CONFIG_USER_ONLY)
#define LOAD_SEG(index, sreg)\
if (tswapl(registers[index]) != env->segs[sreg].selector)\
cpu_x86_load_seg(env, sreg, tswapl(registers[index]));
LOAD_SEG(10, R_CS);
LOAD_SEG(11, R_SS);
LOAD_SEG(12, R_DS);
LOAD_SEG(13, R_ES);
LOAD_SEG(14, R_FS);
LOAD_SEG(15, R_GS);
#endif
}
#elif defined (TARGET_PPC)
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
uint32_t *registers = (uint32_t *)mem_buf, tmp;
int i;
/* fill in gprs */
for(i = 0; i < 32; i++) {
registers[i] = tswapl(env->gpr[i]);
}
/* fill in fprs */
for (i = 0; i < 32; i++) {
registers[(i * 2) + 32] = tswapl(*((uint32_t *)&env->fpr[i]));
registers[(i * 2) + 33] = tswapl(*((uint32_t *)&env->fpr[i] + 1));
}
/* nip, msr, ccr, lnk, ctr, xer, mq */
registers[96] = tswapl(env->nip);
registers[97] = tswapl(env->msr);
tmp = 0;
for (i = 0; i < 8; i++)
tmp |= env->crf[i] << (32 - ((i + 1) * 4));
registers[98] = tswapl(tmp);
registers[99] = tswapl(env->lr);
registers[100] = tswapl(env->ctr);
registers[101] = tswapl(ppc_load_xer(env));
registers[102] = 0;
return 103 * 4;
}
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
{
uint32_t *registers = (uint32_t *)mem_buf;
int i;
/* fill in gprs */
for (i = 0; i < 32; i++) {
env->gpr[i] = tswapl(registers[i]);
}
/* fill in fprs */
for (i = 0; i < 32; i++) {
*((uint32_t *)&env->fpr[i]) = tswapl(registers[(i * 2) + 32]);
*((uint32_t *)&env->fpr[i] + 1) = tswapl(registers[(i * 2) + 33]);
}
/* nip, msr, ccr, lnk, ctr, xer, mq */
env->nip = tswapl(registers[96]);
ppc_store_msr(env, tswapl(registers[97]));
registers[98] = tswapl(registers[98]);
for (i = 0; i < 8; i++)
env->crf[i] = (registers[98] >> (32 - ((i + 1) * 4))) & 0xF;
env->lr = tswapl(registers[99]);
env->ctr = tswapl(registers[100]);
ppc_store_xer(env, tswapl(registers[101]));
}
#elif defined (TARGET_SPARC)
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
target_ulong *registers = (target_ulong *)mem_buf;
int i;
/* fill in g0..g7 */
for(i = 0; i < 8; i++) {
registers[i] = tswapl(env->gregs[i]);
}
/* fill in register window */
for(i = 0; i < 24; i++) {
registers[i + 8] = tswapl(env->regwptr[i]);
}
#ifndef TARGET_SPARC64
/* fill in fprs */
for (i = 0; i < 32; i++) {
registers[i + 32] = tswapl(*((uint32_t *)&env->fpr[i]));
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
registers[64] = tswapl(env->y);
{
target_ulong tmp;
tmp = GET_PSR(env);
registers[65] = tswapl(tmp);
}
registers[66] = tswapl(env->wim);
registers[67] = tswapl(env->tbr);
registers[68] = tswapl(env->pc);
registers[69] = tswapl(env->npc);
registers[70] = tswapl(env->fsr);
registers[71] = 0; /* csr */
registers[72] = 0;
return 73 * sizeof(target_ulong);
#else
/* fill in fprs */
for (i = 0; i < 64; i += 2) {
uint64_t tmp;
tmp = ((uint64_t)*(uint32_t *)&env->fpr[i]) << 32;
tmp |= *(uint32_t *)&env->fpr[i + 1];
registers[i / 2 + 32] = tswap64(tmp);
}
registers[64] = tswapl(env->pc);
registers[65] = tswapl(env->npc);
registers[66] = tswapl(((uint64_t)GET_CCR(env) << 32) |
((env->asi & 0xff) << 24) |
((env->pstate & 0xfff) << 8) |
GET_CWP64(env));
registers[67] = tswapl(env->fsr);
registers[68] = tswapl(env->fprs);
registers[69] = tswapl(env->y);
return 70 * sizeof(target_ulong);
#endif
}
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
{
target_ulong *registers = (target_ulong *)mem_buf;
int i;
/* fill in g0..g7 */
for(i = 0; i < 7; i++) {
env->gregs[i] = tswapl(registers[i]);
}
/* fill in register window */
for(i = 0; i < 24; i++) {
env->regwptr[i] = tswapl(registers[i + 8]);
}
#ifndef TARGET_SPARC64
/* fill in fprs */
for (i = 0; i < 32; i++) {
*((uint32_t *)&env->fpr[i]) = tswapl(registers[i + 32]);
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
env->y = tswapl(registers[64]);
PUT_PSR(env, tswapl(registers[65]));
env->wim = tswapl(registers[66]);
env->tbr = tswapl(registers[67]);
env->pc = tswapl(registers[68]);
env->npc = tswapl(registers[69]);
env->fsr = tswapl(registers[70]);
#else
for (i = 0; i < 64; i += 2) {
uint64_t tmp;
tmp = tswap64(registers[i / 2 + 32]);
*((uint32_t *)&env->fpr[i]) = tmp >> 32;
*((uint32_t *)&env->fpr[i + 1]) = tmp & 0xffffffff;
}
env->pc = tswapl(registers[64]);
env->npc = tswapl(registers[65]);
{
uint64_t tmp = tswapl(registers[66]);
PUT_CCR(env, tmp >> 32);
env->asi = (tmp >> 24) & 0xff;
env->pstate = (tmp >> 8) & 0xfff;
PUT_CWP64(env, tmp & 0xff);
}
env->fsr = tswapl(registers[67]);
env->fprs = tswapl(registers[68]);
env->y = tswapl(registers[69]);
#endif
}
#elif defined (TARGET_ARM)
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
int i;
uint8_t *ptr;
ptr = mem_buf;
/* 16 core integer registers (4 bytes each). */
for (i = 0; i < 16; i++)
{
*(uint32_t *)ptr = tswapl(env->regs[i]);
ptr += 4;
}
/* 8 FPA registers (12 bytes each), FPS (4 bytes).
Not yet implemented. */
memset (ptr, 0, 8 * 12 + 4);
ptr += 8 * 12 + 4;
/* CPSR (4 bytes). */
*(uint32_t *)ptr = tswapl (cpsr_read(env));
ptr += 4;
return ptr - mem_buf;
}
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
{
int i;
uint8_t *ptr;
ptr = mem_buf;
/* Core integer registers. */
for (i = 0; i < 16; i++)
{
env->regs[i] = tswapl(*(uint32_t *)ptr);
ptr += 4;
}
/* Ignore FPA regs and scr. */
ptr += 8 * 12 + 4;
cpsr_write (env, tswapl(*(uint32_t *)ptr), 0xffffffff);
}
#elif defined (TARGET_M68K)
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
int i;
uint8_t *ptr;
CPU_DoubleU u;
ptr = mem_buf;
/* D0-D7 */
for (i = 0; i < 8; i++) {
*(uint32_t *)ptr = tswapl(env->dregs[i]);
ptr += 4;
}
/* A0-A7 */
for (i = 0; i < 8; i++) {
*(uint32_t *)ptr = tswapl(env->aregs[i]);
ptr += 4;
}
*(uint32_t *)ptr = tswapl(env->sr);
ptr += 4;
*(uint32_t *)ptr = tswapl(env->pc);
ptr += 4;
/* F0-F7. The 68881/68040 have 12-bit extended precision registers.
ColdFire has 8-bit double precision registers. */
for (i = 0; i < 8; i++) {
u.d = env->fregs[i];
*(uint32_t *)ptr = tswap32(u.l.upper);
*(uint32_t *)ptr = tswap32(u.l.lower);
}
/* FP control regs (not implemented). */
memset (ptr, 0, 3 * 4);
ptr += 3 * 4;
return ptr - mem_buf;
}
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
{
int i;
uint8_t *ptr;
CPU_DoubleU u;
ptr = mem_buf;
/* D0-D7 */
for (i = 0; i < 8; i++) {
env->dregs[i] = tswapl(*(uint32_t *)ptr);
ptr += 4;
}
/* A0-A7 */
for (i = 0; i < 8; i++) {
env->aregs[i] = tswapl(*(uint32_t *)ptr);
ptr += 4;
}
env->sr = tswapl(*(uint32_t *)ptr);
ptr += 4;
env->pc = tswapl(*(uint32_t *)ptr);
ptr += 4;
/* F0-F7. The 68881/68040 have 12-bit extended precision registers.
ColdFire has 8-bit double precision registers. */
for (i = 0; i < 8; i++) {
u.l.upper = tswap32(*(uint32_t *)ptr);
u.l.lower = tswap32(*(uint32_t *)ptr);
env->fregs[i] = u.d;
}
/* FP control regs (not implemented). */
ptr += 3 * 4;
}
#elif defined (TARGET_MIPS)
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
int i;
uint8_t *ptr;
ptr = mem_buf;
for (i = 0; i < 32; i++)
{
*(target_ulong *)ptr = tswapl(env->gpr[i][env->current_tc]);
ptr += sizeof(target_ulong);
}
*(target_ulong *)ptr = (int32_t)tswap32(env->CP0_Status);
ptr += sizeof(target_ulong);
*(target_ulong *)ptr = tswapl(env->LO[0][env->current_tc]);
ptr += sizeof(target_ulong);
*(target_ulong *)ptr = tswapl(env->HI[0][env->current_tc]);
ptr += sizeof(target_ulong);
*(target_ulong *)ptr = tswapl(env->CP0_BadVAddr);
ptr += sizeof(target_ulong);
*(target_ulong *)ptr = (int32_t)tswap32(env->CP0_Cause);
ptr += sizeof(target_ulong);
*(target_ulong *)ptr = tswapl(env->PC[env->current_tc]);
ptr += sizeof(target_ulong);
if (env->CP0_Config1 & (1 << CP0C1_FP))
{
for (i = 0; i < 32; i++)
{
if (env->CP0_Status & (1 << CP0St_FR))
*(target_ulong *)ptr = tswapl(env->fpu->fpr[i].d);
else
*(target_ulong *)ptr = tswap32(env->fpu->fpr[i].w[FP_ENDIAN_IDX]);
ptr += sizeof(target_ulong);
}
*(target_ulong *)ptr = (int32_t)tswap32(env->fpu->fcr31);
ptr += sizeof(target_ulong);
*(target_ulong *)ptr = (int32_t)tswap32(env->fpu->fcr0);
ptr += sizeof(target_ulong);
}
/* "fp", pseudo frame pointer. Not yet implemented in gdb. */
*(target_ulong *)ptr = 0;
ptr += sizeof(target_ulong);
/* Registers for embedded use, we just pad them. */
for (i = 0; i < 16; i++)
{
*(target_ulong *)ptr = 0;
ptr += sizeof(target_ulong);
}
/* Processor ID. */
*(target_ulong *)ptr = (int32_t)tswap32(env->CP0_PRid);
ptr += sizeof(target_ulong);
return ptr - mem_buf;
}
/* convert MIPS rounding mode in FCR31 to IEEE library */
static unsigned int ieee_rm[] =
{
float_round_nearest_even,
float_round_to_zero,
float_round_up,
float_round_down
};
#define RESTORE_ROUNDING_MODE \
set_float_rounding_mode(ieee_rm[env->fpu->fcr31 & 3], &env->fpu->fp_status)
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
{
int i;
uint8_t *ptr;
ptr = mem_buf;
for (i = 0; i < 32; i++)
{
env->gpr[i][env->current_tc] = tswapl(*(target_ulong *)ptr);
ptr += sizeof(target_ulong);
}
env->CP0_Status = tswapl(*(target_ulong *)ptr);
ptr += sizeof(target_ulong);
env->LO[0][env->current_tc] = tswapl(*(target_ulong *)ptr);
ptr += sizeof(target_ulong);
env->HI[0][env->current_tc] = tswapl(*(target_ulong *)ptr);
ptr += sizeof(target_ulong);
env->CP0_BadVAddr = tswapl(*(target_ulong *)ptr);
ptr += sizeof(target_ulong);
env->CP0_Cause = tswapl(*(target_ulong *)ptr);
ptr += sizeof(target_ulong);
env->PC[env->current_tc] = tswapl(*(target_ulong *)ptr);
ptr += sizeof(target_ulong);
if (env->CP0_Config1 & (1 << CP0C1_FP))
{
for (i = 0; i < 32; i++)
{
if (env->CP0_Status & (1 << CP0St_FR))
env->fpu->fpr[i].d = tswapl(*(target_ulong *)ptr);
else
env->fpu->fpr[i].w[FP_ENDIAN_IDX] = tswapl(*(target_ulong *)ptr);
ptr += sizeof(target_ulong);
}
env->fpu->fcr31 = tswapl(*(target_ulong *)ptr) & 0xFF83FFFF;
ptr += sizeof(target_ulong);
/* The remaining registers are assumed to be read-only. */
/* set rounding mode */
RESTORE_ROUNDING_MODE;
#ifndef CONFIG_SOFTFLOAT
/* no floating point exception for native float */
SET_FP_ENABLE(env->fcr31, 0);
#endif
}
}
#elif defined (TARGET_SH4)
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
uint32_t *ptr = (uint32_t *)mem_buf;
int i;
#define SAVE(x) *ptr++=tswapl(x)
if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
for (i = 0; i < 8; i++) SAVE(env->gregs[i + 16]);
} else {
for (i = 0; i < 8; i++) SAVE(env->gregs[i]);
}
for (i = 8; i < 16; i++) SAVE(env->gregs[i]);
SAVE (env->pc);
SAVE (env->pr);
SAVE (env->gbr);
SAVE (env->vbr);
SAVE (env->mach);
SAVE (env->macl);
SAVE (env->sr);
SAVE (env->fpul);
SAVE (env->fpscr);
for (i = 0; i < 16; i++)
SAVE(env->fregs[i + ((env->fpscr & FPSCR_FR) ? 16 : 0)]);
SAVE (env->ssr);
SAVE (env->spc);
for (i = 0; i < 8; i++) SAVE(env->gregs[i]);
for (i = 0; i < 8; i++) SAVE(env->gregs[i + 16]);
return ((uint8_t *)ptr - mem_buf);
}
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
{
uint32_t *ptr = (uint32_t *)mem_buf;
int i;
#define LOAD(x) (x)=*ptr++;
if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
for (i = 0; i < 8; i++) LOAD(env->gregs[i + 16]);
} else {
for (i = 0; i < 8; i++) LOAD(env->gregs[i]);
}
for (i = 8; i < 16; i++) LOAD(env->gregs[i]);
LOAD (env->pc);
LOAD (env->pr);
LOAD (env->gbr);
LOAD (env->vbr);
LOAD (env->mach);
LOAD (env->macl);
LOAD (env->sr);
LOAD (env->fpul);
LOAD (env->fpscr);
for (i = 0; i < 16; i++)
LOAD(env->fregs[i + ((env->fpscr & FPSCR_FR) ? 16 : 0)]);
LOAD (env->ssr);
LOAD (env->spc);
for (i = 0; i < 8; i++) LOAD(env->gregs[i]);
for (i = 0; i < 8; i++) LOAD(env->gregs[i + 16]);
}
#elif defined (TARGET_CRIS)
static int cris_save_32 (unsigned char *d, uint32_t value)
{
*d++ = (value);
*d++ = (value >>= 8);
*d++ = (value >>= 8);
*d++ = (value >>= 8);
return 4;
}
static int cris_save_16 (unsigned char *d, uint32_t value)
{
*d++ = (value);
*d++ = (value >>= 8);
return 2;
}
static int cris_save_8 (unsigned char *d, uint32_t value)
{
*d++ = (value);
return 1;
}
/* FIXME: this will bug on archs not supporting unaligned word accesses. */
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
uint8_t *ptr = mem_buf;
uint8_t srs;
int i;
for (i = 0; i < 16; i++)
ptr += cris_save_32 (ptr, env->regs[i]);
srs = env->pregs[SR_SRS];
ptr += cris_save_8 (ptr, env->pregs[0]);
ptr += cris_save_8 (ptr, env->pregs[1]);
ptr += cris_save_32 (ptr, env->pregs[2]);
ptr += cris_save_8 (ptr, srs);
ptr += cris_save_16 (ptr, env->pregs[4]);
for (i = 5; i < 16; i++)
ptr += cris_save_32 (ptr, env->pregs[i]);
ptr += cris_save_32 (ptr, env->pc);
for (i = 0; i < 16; i++)
ptr += cris_save_32 (ptr, env->sregs[srs][i]);
return ((uint8_t *)ptr - mem_buf);
}
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
{
uint32_t *ptr = (uint32_t *)mem_buf;
int i;
#define LOAD(x) (x)=*ptr++;
for (i = 0; i < 16; i++) LOAD(env->regs[i]);
LOAD (env->pc);
}
#else
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
return 0;
}
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
{
}
#endif
static int gdb_handle_packet(GDBState *s, CPUState *env, const char *line_buf)
{
const char *p;
int ch, reg_size, type;
char buf[4096];
uint8_t mem_buf[4096];
uint32_t *registers;
target_ulong addr, len;
#ifdef DEBUG_GDB
printf("command='%s'\n", line_buf);
#endif
p = line_buf;
ch = *p++;
switch(ch) {
case '?':
/* TODO: Make this return the correct value for user-mode. */
snprintf(buf, sizeof(buf), "S%02x", SIGTRAP);
put_packet(s, buf);
break;
case 'c':
if (*p != '\0') {
addr = strtoull(p, (char **)&p, 16);
#if defined(TARGET_I386)
env->eip = addr;
#elif defined (TARGET_PPC)
env->nip = addr;
#elif defined (TARGET_SPARC)
env->pc = addr;
env->npc = addr + 4;
#elif defined (TARGET_ARM)
env->regs[15] = addr;
#elif defined (TARGET_SH4)
env->pc = addr;
#elif defined (TARGET_MIPS)
env->PC[env->current_tc] = addr;
#elif defined (TARGET_CRIS)
env->pc = addr;
#endif
}
#ifdef CONFIG_USER_ONLY
s->running_state = 1;
#else
vm_start();
#endif
return RS_IDLE;
case 's':
if (*p != '\0') {
addr = strtoull(p, (char **)&p, 16);
#if defined(TARGET_I386)
env->eip = addr;
#elif defined (TARGET_PPC)
env->nip = addr;
#elif defined (TARGET_SPARC)
env->pc = addr;
env->npc = addr + 4;
#elif defined (TARGET_ARM)
env->regs[15] = addr;
#elif defined (TARGET_SH4)
env->pc = addr;
#elif defined (TARGET_MIPS)
env->PC[env->current_tc] = addr;
#elif defined (TARGET_CRIS)
env->pc = addr;
#endif
}
cpu_single_step(env, 1);
#ifdef CONFIG_USER_ONLY
s->running_state = 1;
#else
vm_start();
#endif
return RS_IDLE;
case 'F':
{
target_ulong ret;
target_ulong err;
ret = strtoull(p, (char **)&p, 16);
if (*p == ',') {
p++;
err = strtoull(p, (char **)&p, 16);
} else {
err = 0;
}
if (*p == ',')
p++;
type = *p;
if (gdb_current_syscall_cb)
gdb_current_syscall_cb(s->env, ret, err);
if (type == 'C') {
put_packet(s, "T02");
} else {
#ifdef CONFIG_USER_ONLY
s->running_state = 1;
#else
vm_start();
#endif
}
}
break;
case 'g':
reg_size = cpu_gdb_read_registers(env, mem_buf);
memtohex(buf, mem_buf, reg_size);
put_packet(s, buf);
break;
case 'G':
registers = (void *)mem_buf;
len = strlen(p) / 2;
hextomem((uint8_t *)registers, p, len);
cpu_gdb_write_registers(env, mem_buf, len);
put_packet(s, "OK");
break;
case 'm':
addr = strtoull(p, (char **)&p, 16);
if (*p == ',')
p++;
len = strtoull(p, NULL, 16);
if (cpu_memory_rw_debug(env, addr, mem_buf, len, 0) != 0) {
put_packet (s, "E14");
} else {
memtohex(buf, mem_buf, len);
put_packet(s, buf);
}
break;
case 'M':
addr = strtoull(p, (char **)&p, 16);
if (*p == ',')
p++;
len = strtoull(p, (char **)&p, 16);