/*
* 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
*/
+#ifdef CONFIG_USER_ONLY
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include "qemu.h"
+#else
#include "vl.h"
+#endif
#include <sys/socket.h>
#include <netinet/in.h>
RS_CHKSUM1,
RS_CHKSUM2,
};
-
-static int gdbserver_fd;
+/* XXX: This is not thread safe. Do we care? */
+static int gdbserver_fd = -1;
typedef struct GDBState {
- enum RSState state;
+ enum RSState state; /* parsing state */
int fd;
char line_buf[4096];
int line_buf_index;
int line_csum;
+#ifdef CONFIG_USER_ONLY
+ int running_state;
+#endif
} GDBState;
+#ifdef CONFIG_USER_ONLY
+/* XXX: remove this hack. */
+static GDBState gdbserver_state;
+#endif
+
static int get_char(GDBState *s)
{
uint8_t ch;
#if defined(TARGET_I386)
-static void to_le32(uint8_t *p, int v)
-{
- p[0] = v;
- p[1] = v >> 8;
- p[2] = v >> 16;
- p[3] = v >> 24;
-}
-
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
+ uint32_t *registers = (uint32_t *)mem_buf;
int i, fpus;
for(i = 0; i < 8; i++) {
- to_le32(mem_buf + i * 4, env->regs[i]);
+ registers[i] = env->regs[i];
}
- to_le32(mem_buf + 8 * 4, env->eip);
- to_le32(mem_buf + 9 * 4, env->eflags);
- to_le32(mem_buf + 10 * 4, env->segs[R_CS].selector);
- to_le32(mem_buf + 11 * 4, env->segs[R_SS].selector);
- to_le32(mem_buf + 12 * 4, env->segs[R_DS].selector);
- to_le32(mem_buf + 13 * 4, env->segs[R_ES].selector);
- to_le32(mem_buf + 14 * 4, env->segs[R_FS].selector);
- to_le32(mem_buf + 15 * 4, env->segs[R_GS].selector);
+ 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);
}
- to_le32(mem_buf + 36 * 4, env->fpuc);
+ registers[36] = env->fpuc;
fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
- to_le32(mem_buf + 37 * 4, fpus);
- to_le32(mem_buf + 38 * 4, 0); /* XXX: convert tags */
- to_le32(mem_buf + 39 * 4, 0); /* fiseg */
- to_le32(mem_buf + 40 * 4, 0); /* fioff */
- to_le32(mem_buf + 41 * 4, 0); /* foseg */
- to_le32(mem_buf + 42 * 4, 0); /* fooff */
- to_le32(mem_buf + 43 * 4, 0); /* fop */
+ 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;
}
for(i = 0; i < 8; i++) {
env->regs[i] = tswapl(registers[i]);
}
- env->eip = registers[8];
- env->eflags = registers[9];
+ 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)\
}
#elif defined (TARGET_PPC)
-static void to_le32(uint32_t *buf, uint32_t v)
-{
- uint8_t *p = (uint8_t *)buf;
- p[3] = v;
- p[2] = v >> 8;
- p[1] = v >> 16;
- p[0] = v >> 24;
-}
-
-static uint32_t from_le32 (uint32_t *buf)
-{
- uint8_t *p = (uint8_t *)buf;
-
- return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
-}
-
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
uint32_t *registers = (uint32_t *)mem_buf, tmp;
/* fill in gprs */
for(i = 0; i < 32; i++) {
- to_le32(®isters[i], env->gpr[i]);
+ registers[i] = tswapl(env->gpr[i]);
}
/* fill in fprs */
for (i = 0; i < 32; i++) {
- to_le32(®isters[(i * 2) + 32], *((uint32_t *)&env->fpr[i]));
- to_le32(®isters[(i * 2) + 33], *((uint32_t *)&env->fpr[i] + 1));
+ 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 */
- to_le32(®isters[96], (uint32_t)env->nip/* - 4*/);
- to_le32(®isters[97], _load_msr(env));
+ registers[96] = tswapl(env->nip);
+ registers[97] = tswapl(_load_msr(env));
tmp = 0;
for (i = 0; i < 8; i++)
tmp |= env->crf[i] << (32 - ((i + 1) * 4));
- to_le32(®isters[98], tmp);
- to_le32(®isters[99], env->lr);
- to_le32(®isters[100], env->ctr);
- to_le32(®isters[101], _load_xer(env));
- to_le32(®isters[102], 0);
+ registers[98] = tswapl(tmp);
+ registers[99] = tswapl(env->lr);
+ registers[100] = tswapl(env->ctr);
+ registers[101] = tswapl(_load_xer(env));
+ registers[102] = 0;
return 103 * 4;
}
/* fill in gprs */
for (i = 0; i < 32; i++) {
- env->gpr[i] = from_le32(®isters[i]);
+ env->gpr[i] = tswapl(registers[i]);
}
/* fill in fprs */
for (i = 0; i < 32; i++) {
- *((uint32_t *)&env->fpr[i]) = from_le32(®isters[(i * 2) + 32]);
- *((uint32_t *)&env->fpr[i] + 1) = from_le32(®isters[(i * 2) + 33]);
+ *((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 = from_le32(®isters[96]);
- _store_msr(env, from_le32(®isters[97]));
- registers[98] = from_le32(®isters[98]);
+ env->nip = tswapl(registers[96]);
+ _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 = from_le32(®isters[99]);
- env->ctr = from_le32(®isters[100]);
- _store_xer(env, from_le32(®isters[101]));
+ env->lr = tswapl(registers[99]);
+ env->ctr = tswapl(registers[100]);
+ _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 < 7; i++) {
+ registers[i] = tswapl(env->gregs[i]);
+ }
+ /* fill in register window */
+ for(i = 0; i < 24; i++) {
+ registers[i + 8] = tswapl(env->regwptr[i]);
+ }
+ /* fill in fprs */
+ for (i = 0; i < 32; i++) {
+ registers[i + 32] = tswapl(*((uint32_t *)&env->fpr[i]));
+ }
+#ifndef TARGET_SPARC64
+ /* 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
+ for (i = 0; i < 32; i += 2) {
+ registers[i/2 + 64] = tswapl(*((uint64_t *)&env->fpr[i]));
+ }
+ registers[81] = tswapl(env->pc);
+ registers[82] = tswapl(env->npc);
+ registers[83] = tswapl(env->tstate[env->tl]);
+ registers[84] = tswapl(env->fsr);
+ registers[85] = tswapl(env->fprs);
+ registers[86] = tswapl(env->y);
+ return 87 * 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]);
+ }
+ /* fill in fprs */
+ for (i = 0; i < 32; i++) {
+ *((uint32_t *)&env->fpr[i]) = tswapl(registers[i + 32]);
+ }
+#ifndef TARGET_SPARC64
+ /* 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 < 32; i += 2) {
+ uint64_t tmp;
+ tmp = tswapl(registers[i/2 + 64]) << 32;
+ tmp |= tswapl(registers[i/2 + 64 + 1]);
+ *((uint64_t *)&env->fpr[i]) = tmp;
+ }
+ env->pc = tswapl(registers[81]);
+ env->npc = tswapl(registers[82]);
+ env->tstate[env->tl] = tswapl(registers[83]);
+ env->fsr = tswapl(registers[84]);
+ env->fprs = tswapl(registers[85]);
+ env->y = tswapl(registers[86]);
+#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 (env->cpsr);
+ 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;
+ env->cpsr = tswapl(*(uint32_t *)ptr);
+}
+#else
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
return 0;
#endif
-/* port = 0 means default port */
-static int gdb_handle_packet(GDBState *s, const char *line_buf)
+static int gdb_handle_packet(GDBState *s, CPUState *env, const char *line_buf)
{
- CPUState *env = cpu_single_env;
const char *p;
int ch, reg_size, type;
char buf[4096];
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;
env->eip = addr;
#elif defined (TARGET_PPC)
env->nip = addr;
+#elif defined (TARGET_SPARC)
+ env->pc = addr;
+ env->npc = addr + 4;
#endif
}
+#ifdef CONFIG_USER_ONLY
+ s->running_state = 1;
+#else
vm_start();
- break;
+#endif
+ return RS_IDLE;
case 's':
if (*p != '\0') {
addr = strtoul(p, (char **)&p, 16);
env->eip = addr;
#elif defined (TARGET_PPC)
env->nip = addr;
+#elif defined (TARGET_SPARC)
+ env->pc = addr;
+ env->npc = addr + 4;
#endif
}
cpu_single_step(env, 1);
+#ifdef CONFIG_USER_ONLY
+ s->running_state = 1;
+#else
vm_start();
- break;
+#endif
+ return RS_IDLE;
case 'g':
reg_size = cpu_gdb_read_registers(env, mem_buf);
memtohex(buf, mem_buf, reg_size);
if (*p == ',')
p++;
len = strtoul(p, (char **)&p, 16);
- if (*p == ',')
+ 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;
put_packet(s, "OK");
} else {
breakpoint_error:
- put_packet(s, "ENN");
+ put_packet(s, "E22");
}
break;
case 'z':
return RS_IDLE;
}
+extern void tb_flush(CPUState *env);
+
+#ifndef CONFIG_USER_ONLY
static void gdb_vm_stopped(void *opaque, int reason)
{
GDBState *s = opaque;
/* disable single step if it was enable */
cpu_single_step(cpu_single_env, 0);
- if (reason == EXCP_DEBUG)
+ if (reason == EXCP_DEBUG) {
+ tb_flush(cpu_single_env);
ret = SIGTRAP;
+ }
else
ret = 0;
snprintf(buf, sizeof(buf), "S%02x", ret);
put_packet(s, buf);
}
+#endif
-static void gdb_read_byte(GDBState *s, int ch)
+static void gdb_read_byte(GDBState *s, CPUState *env, int ch)
{
int i, csum;
char reply[1];
+#ifndef CONFIG_USER_ONLY
if (vm_running) {
/* when the CPU is running, we cannot do anything except stop
it when receiving a char */
vm_stop(EXCP_INTERRUPT);
- } else {
+ } else
+#endif
+ {
switch(s->state) {
case RS_IDLE:
if (ch == '$') {
} else {
reply[0] = '+';
put_buffer(s, reply, 1);
- s->state = gdb_handle_packet(s, s->line_buf);
+ s->state = gdb_handle_packet(s, env, s->line_buf);
}
break;
}
}
}
+#ifdef CONFIG_USER_ONLY
+int
+gdb_handlesig (CPUState *env, int sig)
+{
+ GDBState *s;
+ char buf[256];
+ int n;
+
+ if (gdbserver_fd < 0)
+ return sig;
+
+ s = &gdbserver_state;
+
+ /* disable single step if it was enabled */
+ cpu_single_step(env, 0);
+ tb_flush(env);
+
+ if (sig != 0)
+ {
+ snprintf(buf, sizeof(buf), "S%02x", sig);
+ put_packet(s, buf);
+ }
+
+ sig = 0;
+ s->state = RS_IDLE;
+ s->running_state = 0;
+ while (s->running_state == 0) {
+ n = read (s->fd, buf, 256);
+ if (n > 0)
+ {
+ int i;
+
+ for (i = 0; i < n; i++)
+ gdb_read_byte (s, env, buf[i]);
+ }
+ else if (n == 0 || errno != EAGAIN)
+ {
+ /* XXX: Connection closed. Should probably wait for annother
+ connection before continuing. */
+ return sig;
+ }
+ }
+ return sig;
+}
+
+/* Tell the remote gdb that the process has exited. */
+void gdb_exit(CPUState *env, int code)
+{
+ GDBState *s;
+ char buf[4];
+
+ if (gdbserver_fd < 0)
+ return;
+
+ s = &gdbserver_state;
+
+ snprintf(buf, sizeof(buf), "W%02x", code);
+ put_packet(s, buf);
+}
+
+#else
static int gdb_can_read(void *opaque)
{
return 256;
vm_start();
} else {
for(i = 0; i < size; i++)
- gdb_read_byte(s, buf[i]);
+ gdb_read_byte(s, cpu_single_env, buf[i]);
}
}
+#endif
+
static void gdb_accept(void *opaque, const uint8_t *buf, int size)
{
GDBState *s;
/* set short latency */
val = 1;
- setsockopt(fd, SOL_TCP, TCP_NODELAY, &val, sizeof(val));
+ setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &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->fd = fd;
fcntl(fd, F_SETFL, O_NONBLOCK);
+#ifndef CONFIG_USER_ONLY
/* stop the VM */
vm_stop(EXCP_INTERRUPT);
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
}
static int gdbserver_open(int 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);
+#else
qemu_add_fd_read_handler(gdbserver_fd, NULL, gdb_accept, NULL);
+#endif
return 0;
}
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