X-Git-Url: https://vcs.maemo.org/git/?a=blobdiff_plain;f=gdbstub.c;h=28f9b440c9a8f68bd40fa34275cc63360d6560a5;hb=51996525c77e61a050562900a499798ded8981d0;hp=5fce5d88318c929d82e22974ca6bb2477e98d165;hpb=4c3a88a284b288e0ed3c097de7fc07111d848003;p=qemu diff --git a/gdbstub.c b/gdbstub.c index 5fce5d8..28f9b44 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 @@ -17,86 +17,73 @@ * 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 #include +#include #include -#include #include -#include -#include -#include -#include +#include +#include -#include "config.h" -#ifdef TARGET_I386 -#include "cpu-i386.h" -#endif -#ifdef TARGET_ARM -#include "cpu-arm.h" +#include "qemu.h" +#else +#include "vl.h" #endif -#include "thunk.h" -#include "exec.h" -#define DEBUG_GDB - -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 +#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; + char 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; @@ -108,13 +95,36 @@ static int get_char(void) } 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; @@ -123,6 +133,9 @@ static void put_buffer(const uint8_t *buf, int len) len -= ret; } } +#else + qemu_chr_write(s->chr, buf, len); +#endif } static inline int fromhex(int v) @@ -168,193 +181,96 @@ 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 == '$') - break; - } - len = 0; - csum = 0; - for(;;) { - ch = get_char(); - if (ch < 0) - return -1; - if (ch == '#') - break; - if (len > buf_size - 1) - return -1; - buf[len++] = ch; - csum += ch; - } - buf[len] = '\0'; - ch = get_char(); - if (ch < 0) - return -1; - csum1 = fromhex(ch) << 4; - ch = get_char(); - if (ch < 0) - return -1; - csum1 |= fromhex(ch); - if ((csum & 0xff) != csum1) { - reply[0] = '-'; - put_buffer(reply, 1); - } else { - reply[0] = '+'; - put_buffer(reply, 1); - break; - } - } -#ifdef DEBUG_GDB - printf("command='%s'\n", buf); -#endif - return len; -} - /* return -1 if error, 0 if OK */ -static int put_packet(char *buf) +static int put_packet(GDBState *s, char *buf) { - char buf1[3]; - int len, csum, ch, i; + int len, csum, i; + char *p; #ifdef DEBUG_GDB printf("reply='%s'\n", buf); #endif for(;;) { - buf1[0] = '$'; - 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, 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; } -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]; } - return 0; + 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; } -/* 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) { - CPUState *env; - const char *p; - int ret, ch, nb_regs, i, 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; -#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 '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; -#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; -#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]; + 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])); @@ -365,71 +281,1037 @@ int cpu_gdbstub(void *opaque, int (*main_loop)(void *opaque), int port) LOAD_SEG(14, R_FS); LOAD_SEG(15, R_GS); #endif - put_packet("OK"); - break; - case 'm': - addr = strtoul(p, (char **)&p, 16); +} + +#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(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]); + 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]); + 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[i][env->current_tc]); + ptr += sizeof(target_ulong); + } + + *(target_ulong *)ptr = tswapl(env->CP0_Status); + ptr += sizeof(target_ulong); + + *(target_ulong *)ptr = tswapl(env->LO[0][env->current_tc]); + ptr += sizeof(target_ulong); + + *(target_ulong *)ptr = tswapl(env->HI[0][env->current_tc]); + ptr += sizeof(target_ulong); + + *(target_ulong *)ptr = tswapl(env->CP0_BadVAddr); + ptr += sizeof(target_ulong); + + *(target_ulong *)ptr = tswapl(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++) + { + *(target_ulong *)ptr = tswapl(env->fpu->fpr[i].fs[FP_ENDIAN_IDX]); + ptr += sizeof(target_ulong); + } + + *(target_ulong *)ptr = tswapl(env->fpu->fcr31); + ptr += sizeof(target_ulong); + + *(target_ulong *)ptr = tswapl(env->fpu->fcr0); + ptr += sizeof(target_ulong); + } + + /* 32 FP registers, fsr, fir, fp. Not yet implemented. */ + /* what's 'fp' mean here? */ + + 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[i][env->current_tc] = tswapl(*(target_ulong *)ptr); + ptr += sizeof(target_ulong); + } + + env->CP0_Status = tswapl(*(target_ulong *)ptr); + ptr += sizeof(target_ulong); + + env->LO[0][env->current_tc] = tswapl(*(target_ulong *)ptr); + ptr += sizeof(target_ulong); + + env->HI[0][env->current_tc] = 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++) + { + env->fpu->fpr[i].fs[FP_ENDIAN_IDX] = tswapl(*(target_ulong *)ptr); + ptr += sizeof(target_ulong); + } + + env->fpu->fcr31 = tswapl(*(target_ulong *)ptr) & 0x0183FFFF; + ptr += sizeof(target_ulong); + + env->fpu->fcr0 = tswapl(*(target_ulong *)ptr); + ptr += sizeof(target_ulong); + + /* 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]); +} +#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[2000]; + 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); + 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; +#endif + } +#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; +#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; +#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; + } if (*p == ',') p++; - len = strtoul(p, NULL, 16); - if (memory_rw(mem_buf, addr, 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); + 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_FMT_lx ";Data=" TARGET_FMT_lx ";Bss=" TARGET_FMT_lx, + ts->info->code_offset, + ts->info->data_offset, + ts->info->data_offset); + 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 (memory_rw(mem_buf, addr, len, 1) != 0) - put_packet("ENN"); - else - put_packet("OK"); + } + /* 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; + char reply[1]; + +#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, 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); - 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); + 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