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qemu-e2k/gdbstub.c
pbrook 0f459d16c3 Clean up MMIO TLB handling. 
The IO index is now stored in its own field, instead of being wedged
into the vaddr field.  This eliminates the ROMD and watchpoint host
pointer weirdness.  The IO index space is expanded by 1 bit, and
several additional bits are made available in the TLB vaddr field.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4704 c046a42c-6fe2-441c-8c8c-71466251a162
2008-06-09 00:20:13 +00:00

1598 lines
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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;
int signal;
#ifdef CONFIG_USER_ONLY
int fd;
int running_state;
#else
CharDriverState *chr;
#endif
} GDBState;
/* By default use no IRQs and no timers while single stepping so as to
* make single stepping like an ICE HW step.
*/
static int sstep_flags = SSTEP_ENABLE|SSTEP_NOIRQ|SSTEP_NOTIMER;
#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 == ECONNRESET)
s->fd = -1;
if (errno != EINTR && errno != EAGAIN)
return -1;
} else if (ret == 0) {
close(s->fd);
s->fd = -1;
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;
}
/* Resume execution. */
static inline void gdb_continue(GDBState *s)
{
#ifdef CONFIG_USER_ONLY
s->running_state = 1;
#else
vm_start();
#endif
}
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)
#ifdef TARGET_X86_64
static const uint8_t gdb_x86_64_regs[16] = {
R_EAX, R_EBX, R_ECX, R_EDX, R_ESI, R_EDI, R_EBP, R_ESP,
8, 9, 10, 11, 12, 13, 14, 15,
};
#endif
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
int i, fpus, nb_regs;
uint8_t *p;
p = mem_buf;
#ifdef TARGET_X86_64
if (env->hflags & HF_CS64_MASK) {
nb_regs = 16;
for(i = 0; i < 16; i++) {
*(uint64_t *)p = tswap64(env->regs[gdb_x86_64_regs[i]]);
p += 8;
}
*(uint64_t *)p = tswap64(env->eip);
p += 8;
} else
#endif
{
nb_regs = 8;
for(i = 0; i < 8; i++) {
*(uint32_t *)p = tswap32(env->regs[i]);
p += 4;
}
*(uint32_t *)p = tswap32(env->eip);
p += 4;
}
*(uint32_t *)p = tswap32(env->eflags);
p += 4;
*(uint32_t *)p = tswap32(env->segs[R_CS].selector);
p += 4;
*(uint32_t *)p = tswap32(env->segs[R_SS].selector);
p += 4;
*(uint32_t *)p = tswap32(env->segs[R_DS].selector);
p += 4;
*(uint32_t *)p = tswap32(env->segs[R_ES].selector);
p += 4;
*(uint32_t *)p = tswap32(env->segs[R_FS].selector);
p += 4;
*(uint32_t *)p = tswap32(env->segs[R_GS].selector);
p += 4;
for(i = 0; i < 8; i++) {
/* XXX: convert floats */
#ifdef USE_X86LDOUBLE
memcpy(p, &env->fpregs[i], 10);
#else
memset(p, 0, 10);
#endif
p += 10;
}
*(uint32_t *)p = tswap32(env->fpuc); /* fctrl */
p += 4;
fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
*(uint32_t *)p = tswap32(fpus); /* fstat */
p += 4;
*(uint32_t *)p = 0; /* ftag */
p += 4;
*(uint32_t *)p = 0; /* fiseg */
p += 4;
*(uint32_t *)p = 0; /* fioff */
p += 4;
*(uint32_t *)p = 0; /* foseg */
p += 4;
*(uint32_t *)p = 0; /* fooff */
p += 4;
*(uint32_t *)p = 0; /* fop */
p += 4;
for(i = 0; i < nb_regs; i++) {
*(uint64_t *)p = tswap64(env->xmm_regs[i].XMM_Q(0));
p += 8;
*(uint64_t *)p = tswap64(env->xmm_regs[i].XMM_Q(1));
p += 8;
}
*(uint32_t *)p = tswap32(env->mxcsr);
p += 4;
return p - mem_buf;
}
static inline void cpu_gdb_load_seg(CPUState *env, const uint8_t **pp,
int sreg)
{
const uint8_t *p;
uint32_t sel;
p = *pp;
sel = tswap32(*(uint32_t *)p);
p += 4;
if (sel != env->segs[sreg].selector) {
#if defined(CONFIG_USER_ONLY)
cpu_x86_load_seg(env, sreg, sel);
#else
/* XXX: do it with a debug function which does not raise an
exception */
#endif
}
*pp = p;
}
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
{
const uint8_t *p = mem_buf;
int i, nb_regs;
uint16_t fpus;
#ifdef TARGET_X86_64
if (env->hflags & HF_CS64_MASK) {
nb_regs = 16;
for(i = 0; i < 16; i++) {
env->regs[gdb_x86_64_regs[i]] = tswap64(*(uint64_t *)p);
p += 8;
}
env->eip = tswap64(*(uint64_t *)p);
p += 8;
} else
#endif
{
nb_regs = 8;
for(i = 0; i < 8; i++) {
env->regs[i] = tswap32(*(uint32_t *)p);
p += 4;
}
env->eip = tswap32(*(uint32_t *)p);
p += 4;
}
env->eflags = tswap32(*(uint32_t *)p);
p += 4;
cpu_gdb_load_seg(env, &p, R_CS);
cpu_gdb_load_seg(env, &p, R_SS);
cpu_gdb_load_seg(env, &p, R_DS);
cpu_gdb_load_seg(env, &p, R_ES);
cpu_gdb_load_seg(env, &p, R_FS);
cpu_gdb_load_seg(env, &p, R_GS);
/* FPU state */
for(i = 0; i < 8; i++) {
/* XXX: convert floats */
#ifdef USE_X86LDOUBLE
memcpy(&env->fpregs[i], p, 10);
#endif
p += 10;
}
env->fpuc = tswap32(*(uint32_t *)p); /* fctrl */
p += 4;
fpus = tswap32(*(uint32_t *)p);
p += 4;
env->fpstt = (fpus >> 11) & 7;
env->fpus = fpus & ~0x3800;
p += 4 * 6;
if (size >= ((p - mem_buf) + 16 * nb_regs + 4)) {
/* SSE state */
for(i = 0; i < nb_regs; i++) {
env->xmm_regs[i].XMM_Q(0) = tswap64(*(uint64_t *)p);
p += 8;
env->xmm_regs[i].XMM_Q(1) = tswap64(*(uint64_t *)p);
p += 8;
}
env->mxcsr = tswap32(*(uint32_t *)p);
p += 4;
}
}
#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)
#ifdef TARGET_ABI32
#define tswap_abi(val) tswap32(val &0xffffffff)
#else
#define tswap_abi(val) tswapl(val)
#endif
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
#ifdef TARGET_ABI32
abi_ulong *registers = (abi_ulong *)mem_buf;
#else
target_ulong *registers = (target_ulong *)mem_buf;
#endif
int i;
/* fill in g0..g7 */
for(i = 0; i < 8; i++) {
registers[i] = tswap_abi(env->gregs[i]);
}
/* fill in register window */
for(i = 0; i < 24; i++) {
registers[i + 8] = tswap_abi(env->regwptr[i]);
}
#if !defined(TARGET_SPARC64) || defined(TARGET_ABI32)
/* fill in fprs */
for (i = 0; i < 32; i++) {
registers[i + 32] = tswap_abi(*((uint32_t *)&env->fpr[i]));
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
registers[64] = tswap_abi(env->y);
{
uint32_t tmp;
tmp = GET_PSR(env);
registers[65] = tswap32(tmp);
}
registers[66] = tswap_abi(env->wim);
registers[67] = tswap_abi(env->tbr);
registers[68] = tswap_abi(env->pc);
registers[69] = tswap_abi(env->npc);
registers[70] = tswap_abi(env->fsr);
registers[71] = 0; /* csr */
registers[72] = 0;
return 73 * sizeof(uint32_t);
#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)
{
#ifdef TARGET_ABI32
abi_ulong *registers = (abi_ulong *)mem_buf;
#else
target_ulong *registers = (target_ulong *)mem_buf;
#endif
int i;
/* fill in g0..g7 */
for(i = 0; i < 7; i++) {
env->gregs[i] = tswap_abi(registers[i]);
}
/* fill in register window */
for(i = 0; i < 24; i++) {
env->regwptr[i] = tswap_abi(registers[i + 8]);
}
#if !defined(TARGET_SPARC64) || defined(TARGET_ABI32)
/* fill in fprs */
for (i = 0; i < 32; i++) {
*((uint32_t *)&env->fpr[i]) = tswap_abi(registers[i + 32]);
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
env->y = tswap_abi(registers[64]);
PUT_PSR(env, tswap_abi(registers[65]));
env->wim = tswap_abi(registers[66]);
env->tbr = tswap_abi(registers[67]);
env->pc = tswap_abi(registers[68]);
env->npc = tswap_abi(registers[69]);
env->fsr = tswap_abi(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
}
#undef tswap_abi
#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;
}
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);
/* Remove all the breakpoints when this query is issued,
* because gdb is doing and initial connect and the state
* should be cleaned up.
*/
cpu_breakpoint_remove_all(env);
cpu_watchpoint_remove_all(env);
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
}
gdb_continue(s);
return RS_IDLE;
case 'C':
s->signal = strtoul(p, (char **)&p, 16);
gdb_continue(s);
return RS_IDLE;
case 'k':
/* Kill the target */
fprintf(stderr, "\nQEMU: Terminated via GDBstub\n");
exit(0);
case 'D':
/* Detach packet */
cpu_breakpoint_remove_all(env);
cpu_watchpoint_remove_all(env);
gdb_continue(s);
put_packet(s, "OK");
break;
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, sstep_flags);
gdb_continue(s);
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 {
gdb_continue(s);
}
}
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);
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);
switch (type) {
case 0:
case 1:
if (cpu_breakpoint_insert(env, addr) < 0)
goto breakpoint_error;
put_packet(s, "OK");
break;
#ifndef CONFIG_USER_ONLY
case 2:
type = PAGE_WRITE;
goto insert_watchpoint;
case 3:
type = PAGE_READ;
goto insert_watchpoint;
case 4:
type = PAGE_READ | PAGE_WRITE;
insert_watchpoint:
if (cpu_watchpoint_insert(env, addr, type) < 0)
goto breakpoint_error;
put_packet(s, "OK");
break;
#endif
default:
put_packet(s, "");
break;
}
break;
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 || type <= 4) {
cpu_watchpoint_remove(env, addr);
put_packet(s, "OK");
#endif
} else {
put_packet(s, "");
}
break;
case 'q':
case 'Q':
/* parse any 'q' packets here */
if (!strcmp(p,"qemu.sstepbits")) {
/* Query Breakpoint bit definitions */
sprintf(buf,"ENABLE=%x,NOIRQ=%x,NOTIMER=%x",
SSTEP_ENABLE,
SSTEP_NOIRQ,
SSTEP_NOTIMER);
put_packet(s, buf);
break;
} else if (strncmp(p,"qemu.sstep",10) == 0) {
/* Display or change the sstep_flags */
p += 10;
if (*p != '=') {
/* Display current setting */
sprintf(buf,"0x%x", sstep_flags);
put_packet(s, buf);
break;
}
p++;
type = strtoul(p, (char **)&p, 16);
sstep_flags = type;
put_packet(s, "OK");
break;
}
#ifdef CONFIG_LINUX_USER
else 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;
}
#endif
/* Fall through. */
default:
/* 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 RS_GETLINE:
if (ch == '#') {
s->state = RS_CHKSUM1;
} else if (s->line_buf_index >= sizeof(s->line_buf) - 1) {
s->state = RS_IDLE;
} else {
s->line_buf[s->line_buf_index++] = ch;
}
break;
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 {
reply = '+';
put_buffer(s, &reply, 1);
s->state = gdb_handle_packet(s, env, s->line_buf);
}
break;
default:
abort();
}
}
}
#ifdef CONFIG_USER_ONLY
int
gdb_handlesig (CPUState *env, int sig)
{
GDBState *s;
char buf[256];
int n;
s = &gdbserver_state;
if (gdbserver_fd < 0 || s->fd < 0)
return sig;
/* 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);
}
/* put_packet() might have detected that the peer terminated the
connection. */
if (s->fd < 0)
return sig;
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;
}
}
sig = s->signal;
s->signal = 0;
return sig;
}
/* Tell the remote gdb that the process has exited. */
void gdb_exit(CPUState *env, int code)
{
GDBState *s;
char buf[4];
s = &gdbserver_state;
if (gdbserver_fd < 0 || s->fd < 0)
return;
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
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