/*
* 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 <stdarg.h>
#include <string.h>
-#include <unistd.h>
#include <errno.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <signal.h>
-
-#include "config.h"
-#include "cpu.h"
-#include "thunk.h"
-#include "exec-all.h"
+#include <unistd.h>
+#include <fcntl.h>
-//#define DEBUG_GDB
+#include "qemu.h"
+#else
+#include "qemu-common.h"
+#include "qemu-char.h"
+#include "sysemu.h"
+#include "gdbstub.h"
+#endif
-int gdbstub_fd = -1;
+#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
-/* return 0 if OK */
-static int gdbstub_open(int port)
-{
- struct sockaddr_in sockaddr;
- socklen_t len;
- int fd, val, ret;
+//#define DEBUG_GDB
- fd = socket(PF_INET, SOCK_STREAM, 0);
- if (fd < 0) {
- perror("socket");
- return -1;
- }
+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;
- /* allow fast reuse */
- val = 1;
- setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
+#ifdef CONFIG_USER_ONLY
+/* XXX: This is not thread safe. Do we care? */
+static int gdbserver_fd = -1;
- sockaddr.sin_family = AF_INET;
- sockaddr.sin_port = htons(port);
- sockaddr.sin_addr.s_addr = 0;
- ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr));
- if (ret < 0) {
- perror("bind");
- return -1;
- }
- ret = listen(fd, 0);
- if (ret < 0) {
- perror("listen");
- return -1;
- }
-
- /* now wait for one connection */
- for(;;) {
- len = sizeof(sockaddr);
- gdbstub_fd = accept(fd, (struct sockaddr *)&sockaddr, &len);
- if (gdbstub_fd < 0 && errno != EINTR) {
- perror("accept");
- return -1;
- } else if (gdbstub_fd >= 0) {
- break;
- }
- }
-
- /* set short latency */
- val = 1;
- setsockopt(gdbstub_fd, SOL_TCP, TCP_NODELAY, &val, sizeof(val));
- return 0;
-}
+/* XXX: remove this hack. */
+static GDBState gdbserver_state;
-static int get_char(void)
+static int get_char(GDBState *s)
{
uint8_t ch;
int ret;
for(;;) {
- ret = read(gdbstub_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(const uint8_t *buf, int len)
+static void put_buffer(GDBState *s, const uint8_t *buf, int len)
{
+#ifdef CONFIG_USER_ONLY
int ret;
while (len > 0) {
- ret = write(gdbstub_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 or EOF */
-static int get_packet(char *buf, int buf_size)
-{
- int ch, len, csum, csum1;
- char reply[1];
-
- for(;;) {
- for(;;) {
- ch = get_char();
- if (ch < 0)
- return -1;
- if (ch == '$')
- break;
- }
- len = 0;
- csum = 0;
- for(;;) {
- ch = get_char();
- if (ch < 0)
- return -1;
- if (ch == '#')
- break;
- if (len > buf_size - 1)
- return -1;
- buf[len++] = ch;
- csum += ch;
- }
- buf[len] = '\0';
- ch = get_char();
- if (ch < 0)
- return -1;
- csum1 = fromhex(ch) << 4;
- ch = get_char();
- if (ch < 0)
- return -1;
- csum1 |= fromhex(ch);
- if ((csum & 0xff) != csum1) {
- reply[0] = '-';
- put_buffer(reply, 1);
- } else {
- reply[0] = '+';
- put_buffer(reply, 1);
- break;
- }
- }
-#ifdef DEBUG_GDB
- printf("command='%s'\n", buf);
-#endif
- return len;
-}
-
/* return -1 if error, 0 if OK */
-static int put_packet(char *buf)
+static int put_packet(GDBState *s, char *buf)
{
- char buf1[3];
- int len, csum, ch, i;
+ int len, csum, i;
+ uint8_t *p;
#ifdef DEBUG_GDB
printf("reply='%s'\n", buf);
#endif
for(;;) {
- buf1[0] = '$';
- put_buffer(buf1, 1);
+ p = s->last_packet;
+ *(p++) = '$';
len = strlen(buf);
- put_buffer(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(buf1, 3);
+ s->last_packet_len = p - s->last_packet;
+ put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len);
- ch = get_char();
- 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;
}
#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)
{
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++) {
- to_le32(mem_buf + i * 4, 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[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);
}
- 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(uint8_t *p, int v)
-{
- p[3] = v;
- p[2] = v >> 8;
- p[1] = v >> 16;
- p[0] = v >> 24;
-}
-
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
- uint32_t tmp;
+ uint32_t *registers = (uint32_t *)mem_buf, tmp;
int i;
/* fill in gprs */
- for(i = 0; i < 8; i++) {
- to_le32(mem_buf + i * 4, env->gpr[i]);
+ for(i = 0; i < 32; i++) {
+ registers[i] = tswapl(env->gpr[i]);
}
/* fill in fprs */
for (i = 0; i < 32; i++) {
- to_le32(mem_buf + (i * 2) + 32, *((uint32_t *)&env->fpr[i]));
- to_le32(mem_buf + (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(mem_buf + 96, tswapl(env->nip));
- to_le32(mem_buf + 97, tswapl(_load_msr()));
- to_le32(mem_buf + 98, 0);
+ registers[96] = tswapl(env->nip);
+ registers[97] = tswapl(env->msr);
tmp = 0;
for (i = 0; i < 8; i++)
- tmp |= env->crf[i] << (32 - (i * 4));
- to_le32(mem_buf + 98, tmp);
- to_le32(mem_buf + 99, tswapl(env->lr));
- to_le32(mem_buf + 100, tswapl(env->ctr));
- to_le32(mem_buf + 101, tswapl(_load_xer()));
- to_le32(mem_buf + 102, 0);
+ 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 102;
+ return 103 * 4;
}
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
}
/* nip, msr, ccr, lnk, ctr, xer, mq */
env->nip = tswapl(registers[96]);
- _store_msr(tswapl(registers[97]));
+ 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 * 4))) & 0xF;
+ env->crf[i] = (registers[98] >> (32 - ((i + 1) * 4))) & 0xF;
env->lr = tswapl(registers[99]);
env->ctr = tswapl(registers[100]);
- _store_xer(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)
+{
+ 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[env->current_tc][i]);
+ ptr += sizeof(target_ulong);
+ }
+
+ *(target_ulong *)ptr = (int32_t)tswap32(env->CP0_Status);
+ ptr += sizeof(target_ulong);
+
+ *(target_ulong *)ptr = tswapl(env->LO[env->current_tc][0]);
+ ptr += sizeof(target_ulong);
+
+ *(target_ulong *)ptr = tswapl(env->HI[env->current_tc][0]);
+ 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[env->current_tc][i] = tswapl(*(target_ulong *)ptr);
+ ptr += sizeof(target_ulong);
+ }
+
+ env->CP0_Status = tswapl(*(target_ulong *)ptr);
+ ptr += sizeof(target_ulong);
+
+ env->LO[env->current_tc][0] = tswapl(*(target_ulong *)ptr);
+ ptr += sizeof(target_ulong);
+
+ env->HI[env->current_tc][0] = 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[PR_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;
#endif
-/* port = 0 means default port */
-int cpu_gdbstub(void *opaque, int (*main_loop)(void *opaque), int port)
+static int gdb_handle_packet(GDBState *s, CPUState *env, const char *line_buf)
{
- CPUState *env;
const char *p;
- int ret, ch, reg_size, type;
+ int ch, reg_size, type;
char buf[4096];
- uint8_t mem_buf[2000];
+ uint8_t mem_buf[4096];
uint32_t *registers;
- uint32_t addr, len;
-
- printf("Waiting gdb connection on port %d\n", port);
- if (gdbstub_open(port) < 0)
- return -1;
- printf("Connected\n");
- for(;;) {
- ret = get_packet(buf, sizeof(buf));
- if (ret < 0)
- break;
- p = buf;
- ch = *p++;
- switch(ch) {
- case '?':
- snprintf(buf, sizeof(buf), "S%02x", SIGTRAP);
- put_packet(buf);
- break;
- case 'c':
- if (*p != '\0') {
- addr = strtoul(p, (char **)&p, 16);
- env = cpu_gdbstub_get_env(opaque);
+ 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;
+ env->eip = addr;
#elif defined (TARGET_PPC)
- env->nip = addr;
+ 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
- }
- ret = main_loop(opaque);
- if (ret == EXCP_DEBUG)
- ret = SIGTRAP;
- else
- ret = 0;
- snprintf(buf, sizeof(buf), "S%02x", ret);
- put_packet(buf);
- break;
- case 's':
- env = cpu_gdbstub_get_env(opaque);
- if (*p != '\0') {
- addr = strtoul(p, (char **)&p, 16);
+ }
+#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;
+ env->eip = addr;
#elif defined (TARGET_PPC)
- env->nip = addr;
+ 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;
}
- cpu_single_step(env, 1);
- ret = main_loop(opaque);
- cpu_single_step(env, 0);
- if (ret == EXCP_DEBUG)
- ret = SIGTRAP;
- else
- ret = 0;
- snprintf(buf, sizeof(buf), "S%02x", ret);
- put_packet(buf);
- break;
- case 'g':
- env = cpu_gdbstub_get_env(opaque);
- reg_size = cpu_gdb_read_registers(env, mem_buf);
- memtohex(buf, mem_buf, reg_size);
- put_packet(buf);
- break;
- case 'G':
- env = cpu_gdbstub_get_env(opaque);
- registers = (void *)mem_buf;
- len = strlen(p) / 2;
- hextomem((uint8_t *)registers, p, len);
- cpu_gdb_write_registers(env, mem_buf, len);
- put_packet("OK");
- break;
- case 'm':
- env = cpu_gdbstub_get_env(opaque);
- addr = strtoul(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);
+ 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(buf);
- break;
- case 'M':
- env = cpu_gdbstub_get_env(opaque);
- addr = strtoul(p, (char **)&p, 16);
- if (*p == ',')
- p++;
- len = strtoul(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("ENN");
- else
- put_packet("OK");
+ put_packet(s, buf);
+ }
+ break;
+ case 'M':
+ addr = strtoull(p, (char **)&p, 16);
+ if (*p == ',')
+ p++;
+ 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, "E14");
+ else
+ put_packet(s, "OK");
+ break;
+ case 'Z':
+ type = strtoul(p, (char **)&p, 16);
+ if (*p == ',')
+ p++;
+ addr = strtoull(p, (char **)&p, 16);
+ if (*p == ',')
+ p++;
+ 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, "E22");
+ }
+ break;
+ case 'z':
+ type = strtoul(p, (char **)&p, 16);
+ if (*p == ',')
+ p++;
+ addr = strtoull(p, (char **)&p, 16);
+ if (*p == ',')
+ p++;
+ 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=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx
+ ";Bss=" TARGET_ABI_FMT_lx,
+ ts->info->code_offset,
+ ts->info->data_offset,
+ ts->info->data_offset);
+ put_packet(s, buf);
break;
- case 'Z':
- type = strtoul(p, (char **)&p, 16);
- if (*p == ',')
- p++;
- addr = strtoul(p, (char **)&p, 16);
- if (*p == ',')
- p++;
- len = strtoul(p, (char **)&p, 16);
- if (type == 0 || type == 1) {
- env = cpu_gdbstub_get_env(opaque);
- if (cpu_breakpoint_insert(env, addr) < 0)
- goto breakpoint_error;
- put_packet("OK");
- } else {
- breakpoint_error:
- put_packet("ENN");
+ }
+ /* Fall through. */
+#endif
+ default:
+ // unknown_command:
+ /* put empty packet */
+ buf[0] = '\0';
+ put_packet(s, buf);
+ break;
+ }
+ 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;
+ char buf[256];
+ int ret;
+
+ if (s->state == RS_SYSCALL)
+ return;
+
+ /* disable single step if it was enable */
+ cpu_single_step(s->env, 0);
+
+ if (reason == EXCP_DEBUG) {
+ 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 if (reason == EXCP_INTERRUPT) {
+ ret = SIGINT;
+ } else {
+ ret = 0;
+ }
+ snprintf(buf, sizeof(buf), "S%02x", ret);
+ put_packet(s, buf);
+}
+#endif
+
+/* 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++);
+ }
+ }
+ *p = 0;
+ 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;
+ uint8_t reply;
+
+#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, (uint8_t *)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 != '$')
+ return;
+ }
+ if (vm_running) {
+ /* when the CPU is running, we cannot do anything except stop
+ it when receiving a char */
+ vm_stop(EXCP_INTERRUPT);
+ } else
+#endif
+ {
+ switch(s->state) {
+ case RS_IDLE:
+ if (ch == '$') {
+ s->line_buf_index = 0;
+ s->state = RS_GETLINE;
}
break;
- case 'z':
- type = strtoul(p, (char **)&p, 16);
- if (*p == ',')
- p++;
- addr = strtoul(p, (char **)&p, 16);
- if (*p == ',')
- p++;
- len = strtoul(p, (char **)&p, 16);
- if (type == 0 || type == 1) {
- env = cpu_gdbstub_get_env(opaque);
- cpu_breakpoint_remove(env, addr);
- put_packet("OK");
+ case RS_GETLINE:
+ if (ch == '#') {
+ s->state = RS_CHKSUM1;
+ } else if (s->line_buf_index >= sizeof(s->line_buf) - 1) {
+ s->state = RS_IDLE;
} else {
- goto breakpoint_error;
+ s->line_buf[s->line_buf_index++] = ch;
}
break;
- case 'Q':
- if (!strncmp(p, "Tinit", 5)) {
- /* init traces */
- put_packet("OK");
- } else if (!strncmp(p, "TStart", 6)) {
- /* start log (gdb 'tstart' command) */
- env = cpu_gdbstub_get_env(opaque);
- tb_flush(env);
- cpu_set_log(CPU_LOG_ALL);
- put_packet("OK");
- } else if (!strncmp(p, "TStop", 5)) {
- /* stop log (gdb 'tstop' command) */
- cpu_set_log(0);
- put_packet("OK");
+ case RS_CHKSUM1:
+ s->line_buf[s->line_buf_index] = '\0';
+ s->line_csum = fromhex(ch) << 4;
+ s->state = RS_CHKSUM2;
+ break;
+ case RS_CHKSUM2:
+ s->line_csum |= fromhex(ch);
+ csum = 0;
+ for(i = 0; i < s->line_buf_index; i++) {
+ csum += s->line_buf[i];
+ }
+ if (s->line_csum != (csum & 0xff)) {
+ reply = '-';
+ put_buffer(s, &reply, 1);
+ s->state = RS_IDLE;
} else {
- goto unknown_command;
+ reply = '+';
+ put_buffer(s, &reply, 1);
+ s->state = gdb_handle_packet(s, env, s->line_buf);
}
break;
default:
- unknown_command:
- /* put empty packet */
- buf[0] = '\0';
- put_packet(buf);
+ abort();
+ }
+ }
+}
+
+#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, 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);
+}
+
+
+static void gdb_accept(void *opaque)
+{
+ GDBState *s;
+ struct sockaddr_in sockaddr;
+ socklen_t len;
+ int val, fd;
+
+ for(;;) {
+ len = sizeof(sockaddr);
+ fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len);
+ if (fd < 0 && errno != EINTR) {
+ perror("accept");
+ return;
+ } else if (fd >= 0) {
break;
}
}
+
+ /* set short latency */
+ val = 1;
+ setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
+
+ s = &gdbserver_state;
+ memset (s, 0, sizeof (GDBState));
+ s->env = first_cpu; /* XXX: allow to change CPU */
+ s->fd = fd;
+
+ gdb_syscall_state = s;
+
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+}
+
+static int gdbserver_open(int port)
+{
+ struct sockaddr_in sockaddr;
+ int fd, val, ret;
+
+ fd = socket(PF_INET, SOCK_STREAM, 0);
+ if (fd < 0) {
+ perror("socket");
+ return -1;
+ }
+
+ /* allow fast reuse */
+ val = 1;
+ setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&val, sizeof(val));
+
+ sockaddr.sin_family = AF_INET;
+ sockaddr.sin_port = htons(port);
+ sockaddr.sin_addr.s_addr = 0;
+ ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr));
+ if (ret < 0) {
+ perror("bind");
+ return -1;
+ }
+ ret = listen(fd, 0);
+ if (ret < 0) {
+ perror("listen");
+ return -1;
+ }
+ return fd;
+}
+
+int gdbserver_start(int port)
+{
+ gdbserver_fd = gdbserver_open(port);
+ if (gdbserver_fd < 0)
+ return -1;
+ /* accept connections */
+ gdb_accept (NULL);
return 0;
}
+#else
+static int gdb_chr_can_receive(void *opaque)
+{
+ return 1;
+}
+
+static void gdb_chr_receive(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_receive, gdb_chr_receive,
+ gdb_chr_event, s);
+ qemu_add_vm_stop_handler(gdb_vm_stopped, s);
+ return 0;
+}
+#endif
projects / qemu.git / blobdiff