/*
* gdb server stub
*
- * Copyright (c) 2003 Fabrice Bellard
+ * 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 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 <string.h>
#include <errno.h>
#include <unistd.h>
+#include <fcntl.h>
#include "qemu.h"
#else
#include "vl.h"
#endif
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
+#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
RS_GETLINE,
RS_CHKSUM1,
RS_CHKSUM2,
+ RS_SYSCALL,
};
-/* XXX: This is not thread safe. Do we care? */
-static int gdbserver_fd = -1;
-
typedef struct GDBState {
+ CPUState *env; /* current CPU */
enum RSState state; /* parsing state */
- int fd;
char line_buf[4096];
int line_buf_index;
int line_csum;
+ char 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;
-#endif
static int get_char(GDBState *s)
{
int ret;
for(;;) {
- ret = read(s->fd, &ch, 1);
+ ret = recv(s->fd, &ch, 1, 0);
if (ret < 0) {
if (errno != EINTR && errno != EAGAIN)
return -1;
}
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 = write(s->fd, buf, len);
+ ret = send(s->fd, buf, len, 0);
if (ret < 0) {
if (errno != EINTR && errno != EAGAIN)
return;
len -= ret;
}
}
+#else
+ qemu_chr_write(s->chr, buf, len);
+#endif
}
static inline int fromhex(int v)
/* return -1 if error, 0 if OK */
static int put_packet(GDBState *s, char *buf)
{
- char buf1[3];
- int len, csum, ch, i;
+ int len, csum, i;
+ char *p;
#ifdef DEBUG_GDB
printf("reply='%s'\n", buf);
#endif
for(;;) {
- buf1[0] = '$';
- put_buffer(s, buf1, 1);
+ p = s->last_packet;
+ *(p++) = '$';
len = strlen(buf);
- put_buffer(s, buf, len);
+ memcpy(p, buf, len);
+ p += len;
csum = 0;
for(i = 0; i < len; i++) {
csum += buf[i];
}
- buf1[0] = '#';
- buf1[1] = tohex((csum >> 4) & 0xf);
- buf1[2] = tohex((csum) & 0xf);
+ *(p++) = '#';
+ *(p++) = tohex((csum >> 4) & 0xf);
+ *(p++) = tohex((csum) & 0xf);
- put_buffer(s, buf1, 3);
+ s->last_packet_len = p - s->last_packet;
+ put_buffer(s, s->last_packet, s->last_packet_len);
- ch = get_char(s);
- if (ch < 0)
+#ifdef CONFIG_USER_ONLY
+ i = get_char(s);
+ if (i < 0)
return -1;
- if (ch == '+')
+ if (i == '+')
break;
+#else
+ break;
+#endif
}
return 0;
}
}
/* nip, msr, ccr, lnk, ctr, xer, mq */
registers[96] = tswapl(env->nip);
- registers[97] = tswapl(_load_msr(env));
+ registers[97] = tswapl(do_load_msr(env));
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(_load_xer(env));
+ registers[101] = tswapl(ppc_load_xer(env));
registers[102] = 0;
return 103 * 4;
}
/* nip, msr, ccr, lnk, ctr, xer, mq */
env->nip = tswapl(registers[96]);
- _store_msr(env, tswapl(registers[97]));
+ do_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]);
- _store_xer(env, tswapl(registers[101]));
+ ppc_store_xer(env, tswapl(registers[101]));
}
#elif defined (TARGET_SPARC)
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
- uint32_t *registers = (uint32_t *)mem_buf, tmp;
+ target_ulong *registers = (target_ulong *)mem_buf;
int i;
/* fill in g0..g7 */
- for(i = 0; i < 7; i++) {
+ 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);
- tmp = GET_PSR(env);
- registers[65] = tswapl(tmp);
+ {
+ 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[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;
- return 73 * 4;
+ 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(env->tstate[env->tl]);
+ 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)
{
- uint32_t *registers = (uint32_t *)mem_buf;
+ target_ulong *registers = (target_ulong *)mem_buf;
int i;
/* fill in g0..g7 */
}
/* fill in register window */
for(i = 0; i < 24; i++) {
- env->regwptr[i] = tswapl(registers[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]);
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]);
+ env->tstate[env->tl] = tswapl(registers[66]);
+ 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)
memset (ptr, 0, 8 * 12 + 4);
ptr += 8 * 12 + 4;
/* CPSR (4 bytes). */
- *(uint32_t *)ptr = tswapl (env->cpsr);
+ *(uint32_t *)ptr = tswapl (cpsr_read(env));
ptr += 4;
return ptr - mem_buf;
}
/* Ignore FPA regs and scr. */
ptr += 8 * 12 + 4;
- env->cpsr = tswapl(*(uint32_t *)ptr);
+ 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++)
+ {
+ *(uint32_t *)ptr = tswapl(env->gpr[i]);
+ ptr += 4;
+ }
+
+ *(uint32_t *)ptr = tswapl(env->CP0_Status);
+ ptr += 4;
+
+ *(uint32_t *)ptr = tswapl(env->LO);
+ ptr += 4;
+
+ *(uint32_t *)ptr = tswapl(env->HI);
+ ptr += 4;
+
+ *(uint32_t *)ptr = tswapl(env->CP0_BadVAddr);
+ ptr += 4;
+
+ *(uint32_t *)ptr = tswapl(env->CP0_Cause);
+ ptr += 4;
+
+ *(uint32_t *)ptr = tswapl(env->PC);
+ ptr += 4;
+
+ if (env->CP0_Config1 & (1 << CP0C1_FP))
+ {
+ for (i = 0; i < 32; i++)
+ {
+ *(uint32_t *)ptr = tswapl(env->fpr[i].fs[FP_ENDIAN_IDX]);
+ ptr += 4;
+ }
+
+ *(uint32_t *)ptr = tswapl(env->fcr31);
+ ptr += 4;
+
+ *(uint32_t *)ptr = tswapl(env->fcr0);
+ ptr += 4;
+ }
+
+ /* 32 FP registers, fsr, fir, fp. Not yet implemented. */
+ /* what's 'fp' mean here? */
+
+ return ptr - mem_buf;
+}
+
+/* convert MIPS rounding mode in FCR31 to IEEE library */
+static unsigned int ieee_rm[] =
+ {
+ float_round_nearest_even,
+ float_round_to_zero,
+ float_round_up,
+ float_round_down
+ };
+#define RESTORE_ROUNDING_MODE \
+ set_float_rounding_mode(ieee_rm[env->fcr31 & 3], &env->fp_status)
+
+static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
+{
+ int i;
+ uint8_t *ptr;
+
+ ptr = mem_buf;
+ for (i = 0; i < 32; i++)
+ {
+ env->gpr[i] = tswapl(*(uint32_t *)ptr);
+ ptr += 4;
+ }
+
+ env->CP0_Status = tswapl(*(uint32_t *)ptr);
+ ptr += 4;
+
+ env->LO = tswapl(*(uint32_t *)ptr);
+ ptr += 4;
+
+ env->HI = tswapl(*(uint32_t *)ptr);
+ ptr += 4;
+
+ env->CP0_BadVAddr = tswapl(*(uint32_t *)ptr);
+ ptr += 4;
+
+ env->CP0_Cause = tswapl(*(uint32_t *)ptr);
+ ptr += 4;
+
+ env->PC = tswapl(*(uint32_t *)ptr);
+ ptr += 4;
+
+ if (env->CP0_Config1 & (1 << CP0C1_FP))
+ {
+ for (i = 0; i < 32; i++)
+ {
+ env->fpr[i].fs[FP_ENDIAN_IDX] = tswapl(*(uint32_t *)ptr);
+ ptr += 4;
+ }
+
+ env->fcr31 = tswapl(*(uint32_t *)ptr) & 0x0183FFFF;
+ ptr += 4;
+
+ env->fcr0 = tswapl(*(uint32_t *)ptr);
+ ptr += 4;
+
+ /* set rounding mode */
+ RESTORE_ROUNDING_MODE;
+
+#ifndef CONFIG_SOFTFLOAT
+ /* no floating point exception for native float */
+ SET_FP_ENABLE(env->fcr31, 0);
+#endif
+ }
+}
+#elif defined (TARGET_SH4)
+
+/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
+
+static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
+{
+ uint32_t *ptr = (uint32_t *)mem_buf;
+ int i;
+
+#define SAVE(x) *ptr++=tswapl(x)
+ if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
+ for (i = 0; i < 8; i++) SAVE(env->gregs[i + 16]);
+ } else {
+ for (i = 0; i < 8; i++) SAVE(env->gregs[i]);
+ }
+ for (i = 8; i < 16; i++) SAVE(env->gregs[i]);
+ SAVE (env->pc);
+ SAVE (env->pr);
+ SAVE (env->gbr);
+ SAVE (env->vbr);
+ SAVE (env->mach);
+ SAVE (env->macl);
+ SAVE (env->sr);
+ SAVE (env->fpul);
+ SAVE (env->fpscr);
+ for (i = 0; i < 16; i++)
+ SAVE(env->fregs[i + ((env->fpscr & FPSCR_FR) ? 16 : 0)]);
+ SAVE (env->ssr);
+ SAVE (env->spc);
+ for (i = 0; i < 8; i++) SAVE(env->gregs[i]);
+ for (i = 0; i < 8; i++) SAVE(env->gregs[i + 16]);
+ return ((uint8_t *)ptr - mem_buf);
+}
+
+static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
+{
+ uint32_t *ptr = (uint32_t *)mem_buf;
+ int i;
+
+#define LOAD(x) (x)=*ptr++;
+ if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
+ for (i = 0; i < 8; i++) LOAD(env->gregs[i + 16]);
+ } else {
+ for (i = 0; i < 8; i++) LOAD(env->gregs[i]);
+ }
+ for (i = 8; i < 16; i++) LOAD(env->gregs[i]);
+ LOAD (env->pc);
+ LOAD (env->pr);
+ LOAD (env->gbr);
+ LOAD (env->vbr);
+ LOAD (env->mach);
+ LOAD (env->macl);
+ LOAD (env->sr);
+ LOAD (env->fpul);
+ LOAD (env->fpscr);
+ for (i = 0; i < 16; i++)
+ LOAD(env->fregs[i + ((env->fpscr & FPSCR_FR) ? 16 : 0)]);
+ LOAD (env->ssr);
+ LOAD (env->spc);
+ for (i = 0; i < 8; i++) LOAD(env->gregs[i]);
+ for (i = 0; i < 8; i++) LOAD(env->gregs[i + 16]);
}
#else
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
char buf[4096];
uint8_t mem_buf[2000];
uint32_t *registers;
- uint32_t addr, len;
+ target_ulong addr, len;
#ifdef DEBUG_GDB
printf("command='%s'\n", line_buf);
break;
case 'c':
if (*p != '\0') {
- addr = strtoul(p, (char **)&p, 16);
+ addr = strtoull(p, (char **)&p, 16);
#if defined(TARGET_I386)
env->eip = addr;
#elif defined (TARGET_PPC)
#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;
#endif
}
#ifdef CONFIG_USER_ONLY
#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;
#endif
}
cpu_single_step(env, 1);
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, "OK");
break;
case 'm':
- addr = strtoul(p, (char **)&p, 16);
+ addr = strtoull(p, (char **)&p, 16);
if (*p == ',')
p++;
- len = strtoul(p, NULL, 16);
- if (cpu_memory_rw_debug(env, addr, mem_buf, len, 0) != 0)
- memset(mem_buf, 0, len);
- memtohex(buf, mem_buf, len);
- put_packet(s, buf);
+ 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 = strtoul(p, (char **)&p, 16);
+ addr = strtoull(p, (char **)&p, 16);
if (*p == ',')
p++;
- len = strtoul(p, (char **)&p, 16);
+ len = strtoull(p, (char **)&p, 16);
if (*p == ':')
p++;
hextomem(mem_buf, p, len);
if (cpu_memory_rw_debug(env, addr, mem_buf, len, 1) != 0)
- put_packet(s, "ENN");
+ put_packet(s, "E14");
else
put_packet(s, "OK");
break;
type = strtoul(p, (char **)&p, 16);
if (*p == ',')
p++;
- addr = strtoul(p, (char **)&p, 16);
+ addr = strtoull(p, (char **)&p, 16);
if (*p == ',')
p++;
- len = strtoul(p, (char **)&p, 16);
+ len = strtoull(p, (char **)&p, 16);
if (type == 0 || type == 1) {
if (cpu_breakpoint_insert(env, addr) < 0)
goto breakpoint_error;
put_packet(s, "OK");
+#ifndef CONFIG_USER_ONLY
+ } else if (type == 2) {
+ if (cpu_watchpoint_insert(env, addr) < 0)
+ goto breakpoint_error;
+ put_packet(s, "OK");
+#endif
} else {
breakpoint_error:
- put_packet(s, "ENN");
+ put_packet(s, "E22");
}
break;
case 'z':
type = strtoul(p, (char **)&p, 16);
if (*p == ',')
p++;
- addr = strtoul(p, (char **)&p, 16);
+ addr = strtoull(p, (char **)&p, 16);
if (*p == ',')
p++;
- len = strtoul(p, (char **)&p, 16);
+ len = strtoull(p, (char **)&p, 16);
if (type == 0 || type == 1) {
cpu_breakpoint_remove(env, addr);
put_packet(s, "OK");
+#ifndef CONFIG_USER_ONLY
+ } else if (type == 2) {
+ cpu_watchpoint_remove(env, addr);
+ put_packet(s, "OK");
+#endif
} else {
goto breakpoint_error;
}
break;
+#ifdef CONFIG_LINUX_USER
+ case 'q':
+ if (strncmp(p, "Offsets", 7) == 0) {
+ TaskState *ts = env->opaque;
+
+ sprintf(buf, "Text=%x;Data=%x;Bss=%x", ts->info->code_offset,
+ ts->info->data_offset, ts->info->data_offset);
+ put_packet(s, buf);
+ break;
+ }
+ /* Fall through. */
+#endif
default:
// unknown_command:
/* put empty packet */
char buf[256];
int ret;
+ if (s->state == RS_SYSCALL)
+ return;
+
/* disable single step if it was enable */
- cpu_single_step(cpu_single_env, 0);
+ cpu_single_step(s->env, 0);
if (reason == EXCP_DEBUG) {
- tb_flush(cpu_single_env);
+ if (s->env->watchpoint_hit) {
+ snprintf(buf, sizeof(buf), "T%02xwatch:" TARGET_FMT_lx ";",
+ SIGTRAP,
+ s->env->watchpoint[s->env->watchpoint_hit - 1].vaddr);
+ put_packet(s, buf);
+ s->env->watchpoint_hit = 0;
+ return;
+ }
+ tb_flush(s->env);
ret = SIGTRAP;
- }
- else
+ } else if (reason == EXCP_INTERRUPT) {
+ ret = SIGINT;
+ } else {
ret = 0;
+ }
snprintf(buf, sizeof(buf), "S%02x", ret);
put_packet(s, buf);
}
#endif
-static void gdb_read_byte(GDBState *s, CPUState *env, int ch)
+/* Send a gdb syscall request.
+ This accepts limited printf-style format specifiers, specifically:
+ %x - target_ulong argument printed in hex.
+ %lx - 64-bit argument printed in hex.
+ %s - string pointer (target_ulong) and length (int) pair. */
+void gdb_do_syscall(gdb_syscall_complete_cb cb, char *fmt, ...)
+{
+ va_list va;
+ char buf[256];
+ char *p;
+ target_ulong addr;
+ uint64_t i64;
+ GDBState *s;
+
+ s = gdb_syscall_state;
+ if (!s)
+ return;
+ gdb_current_syscall_cb = cb;
+ s->state = RS_SYSCALL;
+#ifndef CONFIG_USER_ONLY
+ vm_stop(EXCP_DEBUG);
+#endif
+ s->state = RS_IDLE;
+ va_start(va, fmt);
+ p = buf;
+ *(p++) = 'F';
+ while (*fmt) {
+ if (*fmt == '%') {
+ fmt++;
+ switch (*fmt++) {
+ case 'x':
+ addr = va_arg(va, target_ulong);
+ p += sprintf(p, TARGET_FMT_lx, addr);
+ break;
+ case 'l':
+ if (*(fmt++) != 'x')
+ goto bad_format;
+ i64 = va_arg(va, uint64_t);
+ p += sprintf(p, "%" PRIx64, i64);
+ break;
+ case 's':
+ addr = va_arg(va, target_ulong);
+ p += sprintf(p, TARGET_FMT_lx "/%x", addr, va_arg(va, int));
+ break;
+ default:
+ bad_format:
+ fprintf(stderr, "gdbstub: Bad syscall format string '%s'\n",
+ fmt - 1);
+ break;
+ }
+ } else {
+ *(p++) = *(fmt++);
+ }
+ }
+ va_end(va);
+ put_packet(s, buf);
+#ifdef CONFIG_USER_ONLY
+ gdb_handlesig(s->env, 0);
+#else
+ cpu_interrupt(s->env, CPU_INTERRUPT_EXIT);
+#endif
+}
+
+static void gdb_read_byte(GDBState *s, int ch)
{
+ CPUState *env = s->env;
int i, csum;
char reply[1];
#ifndef CONFIG_USER_ONLY
+ if (s->last_packet_len) {
+ /* Waiting for a response to the last packet. If we see the start
+ of a new command then abandon the previous response. */
+ if (ch == '-') {
+#ifdef DEBUG_GDB
+ printf("Got NACK, retransmitting\n");
+#endif
+ put_buffer(s, s->last_packet, s->last_packet_len);
+ }
+#ifdef DEBUG_GDB
+ else if (ch == '+')
+ printf("Got ACK\n");
+ else
+ printf("Got '%c' when expecting ACK/NACK\n", ch);
+#endif
+ if (ch == '+' || ch == '$')
+ s->last_packet_len = 0;
+ if (ch != '$')
+ return;
+ }
if (vm_running) {
/* when the CPU is running, we cannot do anything except stop
it when receiving a char */
s->state = gdb_handle_packet(s, env, s->line_buf);
}
break;
+ default:
+ abort();
}
}
}
int i;
for (i = 0; i < n; i++)
- gdb_read_byte (s, env, buf[i]);
+ gdb_read_byte (s, buf[i]);
}
else if (n == 0 || errno != EAGAIN)
{
put_packet(s, buf);
}
-#else
-static int gdb_can_read(void *opaque)
-{
- return 256;
-}
-
-static void gdb_read(void *opaque, const uint8_t *buf, int size)
-{
- GDBState *s = opaque;
- int i;
- if (size == 0) {
- /* end of connection */
- qemu_del_vm_stop_handler(gdb_vm_stopped, s);
- qemu_del_fd_read_handler(s->fd);
- qemu_free(s);
- vm_start();
- } else {
- for(i = 0; i < size; i++)
- gdb_read_byte(s, cpu_single_env, buf[i]);
- }
-}
-
-#endif
-static void gdb_accept(void *opaque, const uint8_t *buf, int size)
+static void gdb_accept(void *opaque)
{
GDBState *s;
struct sockaddr_in sockaddr;
/* set short latency */
val = 1;
- setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
+ setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
-#ifdef CONFIG_USER_ONLY
s = &gdbserver_state;
memset (s, 0, sizeof (GDBState));
-#else
- s = qemu_mallocz(sizeof(GDBState));
- if (!s) {
- close(fd);
- return;
- }
-#endif
+ s->env = first_cpu; /* XXX: allow to change CPU */
s->fd = fd;
- fcntl(fd, F_SETFL, O_NONBLOCK);
+ gdb_syscall_state = s;
-#ifndef CONFIG_USER_ONLY
- /* stop the VM */
- vm_stop(EXCP_INTERRUPT);
-
- /* start handling I/O */
- qemu_add_fd_read_handler(s->fd, gdb_can_read, gdb_read, s);
- /* when the VM is stopped, the following callback is called */
- qemu_add_vm_stop_handler(gdb_vm_stopped, s);
-#endif
+ fcntl(fd, F_SETFL, O_NONBLOCK);
}
static int gdbserver_open(int port)
/* allow fast reuse */
val = 1;
- setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
+ setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&val, sizeof(val));
sockaddr.sin_family = AF_INET;
sockaddr.sin_port = htons(port);
perror("listen");
return -1;
}
-#ifndef CONFIG_USER_ONLY
- fcntl(fd, F_SETFL, O_NONBLOCK);
-#endif
return fd;
}
if (gdbserver_fd < 0)
return -1;
/* accept connections */
-#ifdef CONFIG_USER_ONLY
- gdb_accept (NULL, NULL, 0);
+ gdb_accept (NULL);
+ return 0;
+}
#else
- qemu_add_fd_read_handler(gdbserver_fd, NULL, gdb_accept, NULL);
-#endif
+static int gdb_chr_can_recieve(void *opaque)
+{
+ return 1;
+}
+
+static void gdb_chr_recieve(void *opaque, const uint8_t *buf, int size)
+{
+ GDBState *s = opaque;
+ int i;
+
+ for (i = 0; i < size; i++) {
+ gdb_read_byte(s, buf[i]);
+ }
+}
+
+static void gdb_chr_event(void *opaque, int event)
+{
+ switch (event) {
+ case CHR_EVENT_RESET:
+ vm_stop(EXCP_INTERRUPT);
+ gdb_syscall_state = opaque;
+ break;
+ default:
+ break;
+ }
+}
+
+int gdbserver_start(const char *port)
+{
+ GDBState *s;
+ char gdbstub_port_name[128];
+ int port_num;
+ char *p;
+ CharDriverState *chr;
+
+ if (!port || !*port)
+ return -1;
+
+ port_num = strtol(port, &p, 10);
+ if (*p == 0) {
+ /* A numeric value is interpreted as a port number. */
+ snprintf(gdbstub_port_name, sizeof(gdbstub_port_name),
+ "tcp::%d,nowait,nodelay,server", port_num);
+ port = gdbstub_port_name;
+ }
+
+ chr = qemu_chr_open(port);
+ if (!chr)
+ return -1;
+
+ s = qemu_mallocz(sizeof(GDBState));
+ if (!s) {
+ return -1;
+ }
+ s->env = first_cpu; /* XXX: allow to change CPU */
+ s->chr = chr;
+ qemu_chr_add_handlers(chr, gdb_chr_can_recieve, gdb_chr_recieve,
+ gdb_chr_event, s);
+ qemu_add_vm_stop_handler(gdb_vm_stopped, s);
return 0;
}
+#endif
projects / qemu.git / blobdiff