/*
* 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;
#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 < 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);
- 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 * 4;
+ 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)
{
- 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]);
}
/* 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->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->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);
#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':
extern void tb_flush(CPUState *env);
+#ifndef CONFIG_USER_ONLY
static void gdb_vm_stopped(void *opaque, int reason)
{
GDBState *s = opaque;
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;
val = 1;
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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