X-Git-Url: http://vcs.maemo.org/git/?a=blobdiff_plain;f=gdbstub.c;h=8157160fd1eab16ede6b1a72a9cfb60cdd999a42;hb=c2ff060fd4c7389de2016442e3327538a66696bd;hp=d73a7efe3680e6ca56279d0ddef60c4337812e39;hpb=6180a1818ad1f6147983e48314ab6cbf49d4f084;p=qemu diff --git a/gdbstub.c b/gdbstub.c index d73a7ef..8157160 100644 --- a/gdbstub.c +++ b/gdbstub.c @@ -1,7 +1,7 @@ /* * 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 @@ -17,81 +17,59 @@ * 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 #include +#include #include -#include #include +#include + +#include "qemu.h" +#else +#include "vl.h" +#endif + #include #include #include #include -#include "config.h" -#include "cpu.h" -#include "thunk.h" -#include "exec-all.h" - //#define DEBUG_GDB -int gdbstub_fd = -1; - -/* return 0 if OK */ -static int gdbstub_open(int port) -{ - struct sockaddr_in sockaddr; - socklen_t len; - int fd, val, ret; - - fd = socket(PF_INET, SOCK_STREAM, 0); - if (fd < 0) { - perror("socket"); - return -1; - } +enum RSState { + RS_IDLE, + RS_GETLINE, + RS_CHKSUM1, + RS_CHKSUM2, +}; +/* XXX: This is not thread safe. Do we care? */ +static int gdbserver_fd = -1; - /* allow fast reuse */ - val = 1; - setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)); +typedef struct GDBState { + CPUState *env; /* current CPU */ + enum RSState state; /* parsing state */ + int fd; + char line_buf[4096]; + int line_buf_index; + int line_csum; +#ifdef CONFIG_USER_ONLY + int running_state; +#endif +} GDBState; - 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; -} +#ifdef CONFIG_USER_ONLY +/* XXX: remove this hack. */ +static GDBState gdbserver_state; +#endif -static int get_char(void) +static int get_char(GDBState *s) { uint8_t ch; int ret; for(;;) { - ret = read(gdbstub_fd, &ch, 1); + ret = read(s->fd, &ch, 1); if (ret < 0) { if (errno != EINTR && errno != EAGAIN) return -1; @@ -104,12 +82,12 @@ static int get_char(void) return ch; } -static void put_buffer(const uint8_t *buf, int len) +static void put_buffer(GDBState *s, const uint8_t *buf, int len) { int ret; while (len > 0) { - ret = write(gdbstub_fd, buf, len); + ret = write(s->fd, buf, len); if (ret < 0) { if (errno != EINTR && errno != EAGAIN) return; @@ -163,59 +141,8 @@ static void hextomem(uint8_t *mem, const char *buf, int len) } } -/* 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 == '$') - break; - } - len = 0; - csum = 0; - for(;;) { - ch = get_char(); - if (ch < 0) - return -1; - if (ch == '#') - break; - if (len > buf_size - 1) - return -1; - buf[len++] = ch; - csum += ch; - } - buf[len] = '\0'; - ch = get_char(); - if (ch < 0) - return -1; - csum1 = fromhex(ch) << 4; - ch = get_char(); - if (ch < 0) - return -1; - csum1 |= fromhex(ch); - if ((csum & 0xff) != csum1) { - reply[0] = '-'; - put_buffer(reply, 1); - } else { - reply[0] = '+'; - put_buffer(reply, 1); - break; - } - } -#ifdef DEBUG_GDB - printf("command='%s'\n", buf); -#endif - return len; -} - /* return -1 if error, 0 if OK */ -static int put_packet(char *buf) +static int put_packet(GDBState *s, char *buf) { char buf1[3]; int len, csum, ch, i; @@ -226,9 +153,9 @@ static int put_packet(char *buf) for(;;) { buf1[0] = '$'; - put_buffer(buf1, 1); + put_buffer(s, buf1, 1); len = strlen(buf); - put_buffer(buf, len); + put_buffer(s, buf, len); csum = 0; for(i = 0; i < len; i++) { csum += buf[i]; @@ -237,9 +164,9 @@ static int put_packet(char *buf) buf1[1] = tohex((csum >> 4) & 0xf); buf1[2] = tohex((csum) & 0xf); - put_buffer(buf1, 3); + put_buffer(s, buf1, 3); - ch = get_char(); + ch = get_char(s); if (ch < 0) return -1; if (ch == '+') @@ -248,201 +175,726 @@ static int put_packet(char *buf) return 0; } -static int memory_rw(uint8_t *buf, uint32_t addr, int len, int is_write) +#if defined(TARGET_I386) + +static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) { - int l, flags; - uint32_t page; + uint32_t *registers = (uint32_t *)mem_buf; + int i, fpus; - while (len > 0) { - page = addr & TARGET_PAGE_MASK; - l = (page + TARGET_PAGE_SIZE) - addr; - if (l > len) - l = len; - flags = page_get_flags(page); - if (!(flags & PAGE_VALID)) - return -1; - if (is_write) { - if (!(flags & PAGE_WRITE)) - return -1; - memcpy((uint8_t *)addr, buf, l); - } else { - if (!(flags & PAGE_READ)) - return -1; - memcpy(buf, (uint8_t *)addr, l); - } - len -= l; - buf += l; - addr += l; + for(i = 0; i < 8; i++) { + 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); } + registers[36] = env->fpuc; + fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; + 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; +} + +static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) +{ + uint32_t *registers = (uint32_t *)mem_buf; + int i; + + for(i = 0; i < 8; i++) { + env->regs[i] = tswapl(registers[i]); + } + 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)\ + cpu_x86_load_seg(env, sreg, tswapl(registers[index])); + LOAD_SEG(10, R_CS); + LOAD_SEG(11, R_SS); + LOAD_SEG(12, R_DS); + LOAD_SEG(13, R_ES); + LOAD_SEG(14, R_FS); + LOAD_SEG(15, R_GS); +#endif +} + +#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(do_load_msr(env)); + tmp = 0; + for (i = 0; i < 8; i++) + tmp |= env->crf[i] << (32 - ((i + 1) * 4)); + registers[98] = tswapl(tmp); + registers[99] = tswapl(env->lr); + registers[100] = tswapl(env->ctr); + registers[101] = tswapl(do_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]); + do_store_msr(env, tswapl(registers[97])); + registers[98] = tswapl(registers[98]); + for (i = 0; i < 8; i++) + env->crf[i] = (registers[98] >> (32 - ((i + 1) * 4))) & 0xF; + env->lr = tswapl(registers[99]); + env->ctr = tswapl(registers[100]); + do_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]); + } + /* 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 (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_MIPS) +static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) +{ + int i; + uint8_t *ptr; + + ptr = mem_buf; + for (i = 0; i < 32; i++) + { + *(uint32_t *)ptr = tswapl(env->gpr[i]); + ptr += 4; + } + + *(uint32_t *)ptr = tswapl(env->CP0_Status); + ptr += 4; + + *(uint32_t *)ptr = tswapl(env->LO); + ptr += 4; + + *(uint32_t *)ptr = tswapl(env->HI); + ptr += 4; + + *(uint32_t *)ptr = tswapl(env->CP0_BadVAddr); + ptr += 4; + + *(uint32_t *)ptr = tswapl(env->CP0_Cause); + ptr += 4; + + *(uint32_t *)ptr = tswapl(env->PC); + ptr += 4; + + /* 32 FP registers, fsr, fir, fp. Not yet implemented. */ + + 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; + for (i = 0; i < 32; i++) + { + env->gpr[i] = tswapl(*(uint32_t *)ptr); + ptr += 4; + } + + env->CP0_Status = tswapl(*(uint32_t *)ptr); + ptr += 4; + + env->LO = tswapl(*(uint32_t *)ptr); + ptr += 4; + + env->HI = tswapl(*(uint32_t *)ptr); + ptr += 4; + + env->CP0_BadVAddr = tswapl(*(uint32_t *)ptr); + ptr += 4; + + env->CP0_Cause = tswapl(*(uint32_t *)ptr); + ptr += 4; + + env->PC = tswapl(*(uint32_t *)ptr); + ptr += 4; +} +#else +static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) +{ return 0; } -/* port = 0 means default port */ -int cpu_gdbstub(void *opaque, int (*main_loop)(void *opaque), int port) +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) { - CPUState *env; const char *p; - int ret, ch, nb_regs, i, type; + int ch, reg_size, type; char buf[4096]; uint8_t mem_buf[2000]; 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); -#if defined(TARGET_I386) - env->eip = addr; +#ifdef DEBUG_GDB + printf("command='%s'\n", line_buf); #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); + 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 = strtoul(p, (char **)&p, 16); #if defined(TARGET_I386) - env->eip = addr; + 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; #endif - } - 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); - registers = (void *)mem_buf; -#if defined(TARGET_I386) - for(i = 0; i < 8; i++) { - registers[i] = tswapl(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; - nb_regs = 16; + } +#ifdef CONFIG_USER_ONLY + s->running_state = 1; +#else + vm_start(); #endif - memtohex(buf, (const uint8_t *)registers, - sizeof(registers[0]) * nb_regs); - put_packet(buf); - break; - case 'G': - env = cpu_gdbstub_get_env(opaque); - registers = (void *)mem_buf; + return RS_IDLE; + case 's': + if (*p != '\0') { + addr = strtoul(p, (char **)&p, 16); #if defined(TARGET_I386) - hextomem((uint8_t *)registers, p, 16 * 4); - for(i = 0; i < 8; i++) { - env->regs[i] = tswapl(registers[i]); - } - env->eip = registers[8]; - env->eflags = registers[9]; -#define LOAD_SEG(index, sreg)\ - if (tswapl(registers[index]) != env->segs[sreg].selector)\ - cpu_x86_load_seg(env, sreg, tswapl(registers[index])); - LOAD_SEG(10, R_CS); - LOAD_SEG(11, R_SS); - LOAD_SEG(12, R_DS); - LOAD_SEG(13, R_ES); - LOAD_SEG(14, R_FS); - LOAD_SEG(15, R_GS); + 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; #endif - put_packet("OK"); - break; - case 'm': - addr = strtoul(p, (char **)&p, 16); - if (*p == ',') - p++; - len = strtoul(p, NULL, 16); - if (memory_rw(mem_buf, addr, len, 0) != 0) - memset(mem_buf, 0, len); + } + cpu_single_step(env, 1); +#ifdef CONFIG_USER_ONLY + s->running_state = 1; +#else + vm_start(); +#endif + return RS_IDLE; + 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 = 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) { + put_packet (s, "E14"); + } else { memtohex(buf, mem_buf, len); - put_packet(buf); - break; - case 'M': - addr = strtoul(p, (char **)&p, 16); - if (*p == ',') - p++; - len = strtoul(p, (char **)&p, 16); - if (*p == ',') - p++; - hextomem(mem_buf, p, len); - if (memory_rw(mem_buf, addr, len, 1) != 0) - put_packet("ENN"); - else - put_packet("OK"); + put_packet(s, buf); + } + break; + case 'M': + 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(s, "E14"); + else + put_packet(s, "OK"); + 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) { + if (cpu_breakpoint_insert(env, addr) < 0) + goto breakpoint_error; + put_packet(s, "OK"); + } else { + breakpoint_error: + put_packet(s, "E22"); + } + 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) { + cpu_breakpoint_remove(env, addr); + put_packet(s, "OK"); + } else { + goto breakpoint_error; + } + break; + 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; + + /* disable single step if it was enable */ + cpu_single_step(s->env, 0); + + if (reason == EXCP_DEBUG) { + 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 + +static void gdb_read_byte(GDBState *s, int ch) +{ + CPUState *env = s->env; + 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 +#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); - if (cpu_breakpoint_insert(env, addr) < 0) - goto breakpoint_error; - 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 { - breakpoint_error: - put_packet("ENN"); + s->line_buf[s->line_buf_index++] = ch; } 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_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[0] = '-'; + put_buffer(s, reply, 1); + s->state = RS_IDLE; } else { - goto breakpoint_error; + reply[0] = '+'; + put_buffer(s, reply, 1); + s->state = gdb_handle_packet(s, env, s->line_buf); } break; - default: - /* put empty packet */ - buf[0] = '\0'; - put_packet(buf); + } + } +} + +#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); +} + +#else +static void gdb_read(void *opaque) +{ + GDBState *s = opaque; + int i, size; + uint8_t buf[4096]; + + size = read(s->fd, buf, sizeof(buf)); + if (size < 0) + return; + if (size == 0) { + /* end of connection */ + qemu_del_vm_stop_handler(gdb_vm_stopped, s); + qemu_set_fd_handler(s->fd, NULL, NULL, NULL); + qemu_free(s); + vm_start(); + } else { + for(i = 0; i < size; i++) + gdb_read_byte(s, buf[i]); + } +} + +#endif + +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, &val, sizeof(val)); + +#ifdef CONFIG_USER_ONLY + s = &gdbserver_state; + memset (s, 0, sizeof (GDBState)); +#else + s = qemu_mallocz(sizeof(GDBState)); + if (!s) { + close(fd); + return; + } +#endif + s->env = first_cpu; /* XXX: allow to change CPU */ + s->fd = fd; + + fcntl(fd, F_SETFL, O_NONBLOCK); + +#ifndef CONFIG_USER_ONLY + /* stop the VM */ + vm_stop(EXCP_INTERRUPT); + + /* start handling I/O */ + qemu_set_fd_handler(s->fd, gdb_read, NULL, 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) +{ + 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, &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; + } +#ifndef CONFIG_USER_ONLY + fcntl(fd, F_SETFL, O_NONBLOCK); +#endif + return fd; +} + +int gdbserver_start(int port) +{ + gdbserver_fd = gdbserver_open(port); + if (gdbserver_fd < 0) + return -1; + /* accept connections */ +#ifdef CONFIG_USER_ONLY + gdb_accept (NULL); +#else + qemu_set_fd_handler(gdbserver_fd, gdb_accept, NULL, NULL); +#endif return 0; }