| /* General "disassemble this chunk" code. Used for debugging. */ |
| #include "qemu/osdep.h" |
| #include "qemu-common.h" |
| #include "disas/bfd.h" |
| #include "elf.h" |
| |
| #include "cpu.h" |
| #include "disas/disas.h" |
| |
| typedef struct CPUDebug { |
| struct disassemble_info info; |
| CPUState *cpu; |
| } CPUDebug; |
| |
| /* Filled in by elfload.c. Simplistic, but will do for now. */ |
| struct syminfo *syminfos = NULL; |
| |
| /* Get LENGTH bytes from info's buffer, at target address memaddr. |
| Transfer them to myaddr. */ |
| int |
| buffer_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length, |
| struct disassemble_info *info) |
| { |
| if (memaddr < info->buffer_vma |
| || memaddr + length > info->buffer_vma + info->buffer_length) |
| /* Out of bounds. Use EIO because GDB uses it. */ |
| return EIO; |
| memcpy (myaddr, info->buffer + (memaddr - info->buffer_vma), length); |
| return 0; |
| } |
| |
| /* Get LENGTH bytes from info's buffer, at target address memaddr. |
| Transfer them to myaddr. */ |
| static int |
| target_read_memory (bfd_vma memaddr, |
| bfd_byte *myaddr, |
| int length, |
| struct disassemble_info *info) |
| { |
| CPUDebug *s = container_of(info, CPUDebug, info); |
| |
| cpu_memory_rw_debug(s->cpu, memaddr, myaddr, length, 0); |
| return 0; |
| } |
| |
| /* Print an error message. We can assume that this is in response to |
| an error return from buffer_read_memory. */ |
| void |
| perror_memory (int status, bfd_vma memaddr, struct disassemble_info *info) |
| { |
| if (status != EIO) |
| /* Can't happen. */ |
| (*info->fprintf_func) (info->stream, "Unknown error %d\n", status); |
| else |
| /* Actually, address between memaddr and memaddr + len was |
| out of bounds. */ |
| (*info->fprintf_func) (info->stream, |
| "Address 0x%" PRIx64 " is out of bounds.\n", memaddr); |
| } |
| |
| /* This could be in a separate file, to save minuscule amounts of space |
| in statically linked executables. */ |
| |
| /* Just print the address is hex. This is included for completeness even |
| though both GDB and objdump provide their own (to print symbolic |
| addresses). */ |
| |
| void |
| generic_print_address (bfd_vma addr, struct disassemble_info *info) |
| { |
| (*info->fprintf_func) (info->stream, "0x%" PRIx64, addr); |
| } |
| |
| /* Print address in hex, truncated to the width of a host virtual address. */ |
| static void |
| generic_print_host_address(bfd_vma addr, struct disassemble_info *info) |
| { |
| uint64_t mask = ~0ULL >> (64 - (sizeof(void *) * 8)); |
| generic_print_address(addr & mask, info); |
| } |
| |
| /* Just return the given address. */ |
| |
| int |
| generic_symbol_at_address (bfd_vma addr, struct disassemble_info *info) |
| { |
| return 1; |
| } |
| |
| bfd_vma bfd_getl64 (const bfd_byte *addr) |
| { |
| unsigned long long v; |
| |
| v = (unsigned long long) addr[0]; |
| v |= (unsigned long long) addr[1] << 8; |
| v |= (unsigned long long) addr[2] << 16; |
| v |= (unsigned long long) addr[3] << 24; |
| v |= (unsigned long long) addr[4] << 32; |
| v |= (unsigned long long) addr[5] << 40; |
| v |= (unsigned long long) addr[6] << 48; |
| v |= (unsigned long long) addr[7] << 56; |
| return (bfd_vma) v; |
| } |
| |
| bfd_vma bfd_getl32 (const bfd_byte *addr) |
| { |
| unsigned long v; |
| |
| v = (unsigned long) addr[0]; |
| v |= (unsigned long) addr[1] << 8; |
| v |= (unsigned long) addr[2] << 16; |
| v |= (unsigned long) addr[3] << 24; |
| return (bfd_vma) v; |
| } |
| |
| bfd_vma bfd_getb32 (const bfd_byte *addr) |
| { |
| unsigned long v; |
| |
| v = (unsigned long) addr[0] << 24; |
| v |= (unsigned long) addr[1] << 16; |
| v |= (unsigned long) addr[2] << 8; |
| v |= (unsigned long) addr[3]; |
| return (bfd_vma) v; |
| } |
| |
| bfd_vma bfd_getl16 (const bfd_byte *addr) |
| { |
| unsigned long v; |
| |
| v = (unsigned long) addr[0]; |
| v |= (unsigned long) addr[1] << 8; |
| return (bfd_vma) v; |
| } |
| |
| bfd_vma bfd_getb16 (const bfd_byte *addr) |
| { |
| unsigned long v; |
| |
| v = (unsigned long) addr[0] << 24; |
| v |= (unsigned long) addr[1] << 16; |
| return (bfd_vma) v; |
| } |
| |
| static int print_insn_objdump(bfd_vma pc, disassemble_info *info, |
| const char *prefix) |
| { |
| int i, n = info->buffer_length; |
| uint8_t *buf = g_malloc(n); |
| |
| info->read_memory_func(pc, buf, n, info); |
| |
| for (i = 0; i < n; ++i) { |
| if (i % 32 == 0) { |
| info->fprintf_func(info->stream, "\n%s: ", prefix); |
| } |
| info->fprintf_func(info->stream, "%02x", buf[i]); |
| } |
| |
| g_free(buf); |
| return n; |
| } |
| |
| static int print_insn_od_host(bfd_vma pc, disassemble_info *info) |
| { |
| return print_insn_objdump(pc, info, "OBJD-H"); |
| } |
| |
| static int print_insn_od_target(bfd_vma pc, disassemble_info *info) |
| { |
| return print_insn_objdump(pc, info, "OBJD-T"); |
| } |
| |
| /* Disassemble this for me please... (debugging). 'flags' has the following |
| values: |
| i386 - 1 means 16 bit code, 2 means 64 bit code |
| ppc - bits 0:15 specify (optionally) the machine instruction set; |
| bit 16 indicates little endian. |
| other targets - unused |
| */ |
| void target_disas(FILE *out, CPUState *cpu, target_ulong code, |
| target_ulong size, int flags) |
| { |
| CPUClass *cc = CPU_GET_CLASS(cpu); |
| target_ulong pc; |
| int count; |
| CPUDebug s; |
| |
| INIT_DISASSEMBLE_INFO(s.info, out, fprintf); |
| |
| s.cpu = cpu; |
| s.info.read_memory_func = target_read_memory; |
| s.info.buffer_vma = code; |
| s.info.buffer_length = size; |
| s.info.print_address_func = generic_print_address; |
| |
| #ifdef TARGET_WORDS_BIGENDIAN |
| s.info.endian = BFD_ENDIAN_BIG; |
| #else |
| s.info.endian = BFD_ENDIAN_LITTLE; |
| #endif |
| |
| if (cc->disas_set_info) { |
| cc->disas_set_info(cpu, &s.info); |
| } |
| |
| #if defined(TARGET_I386) |
| if (flags == 2) { |
| s.info.mach = bfd_mach_x86_64; |
| } else if (flags == 1) { |
| s.info.mach = bfd_mach_i386_i8086; |
| } else { |
| s.info.mach = bfd_mach_i386_i386; |
| } |
| s.info.print_insn = print_insn_i386; |
| #elif defined(TARGET_PPC) |
| if ((flags >> 16) & 1) { |
| s.info.endian = BFD_ENDIAN_LITTLE; |
| } |
| if (flags & 0xFFFF) { |
| /* If we have a precise definition of the instruction set, use it. */ |
| s.info.mach = flags & 0xFFFF; |
| } else { |
| #ifdef TARGET_PPC64 |
| s.info.mach = bfd_mach_ppc64; |
| #else |
| s.info.mach = bfd_mach_ppc; |
| #endif |
| } |
| s.info.disassembler_options = (char *)"any"; |
| s.info.print_insn = print_insn_ppc; |
| #endif |
| if (s.info.print_insn == NULL) { |
| s.info.print_insn = print_insn_od_target; |
| } |
| |
| for (pc = code; size > 0; pc += count, size -= count) { |
| fprintf(out, "0x" TARGET_FMT_lx ": ", pc); |
| count = s.info.print_insn(pc, &s.info); |
| #if 0 |
| { |
| int i; |
| uint8_t b; |
| fprintf(out, " {"); |
| for(i = 0; i < count; i++) { |
| target_read_memory(pc + i, &b, 1, &s.info); |
| fprintf(out, " %02x", b); |
| } |
| fprintf(out, " }"); |
| } |
| #endif |
| fprintf(out, "\n"); |
| if (count < 0) |
| break; |
| if (size < count) { |
| fprintf(out, |
| "Disassembler disagrees with translator over instruction " |
| "decoding\n" |
| "Please report this to qemu-devel@nongnu.org\n"); |
| break; |
| } |
| } |
| } |
| |
| /* Disassemble this for me please... (debugging). */ |
| void disas(FILE *out, void *code, unsigned long size) |
| { |
| uintptr_t pc; |
| int count; |
| CPUDebug s; |
| int (*print_insn)(bfd_vma pc, disassemble_info *info) = NULL; |
| |
| INIT_DISASSEMBLE_INFO(s.info, out, fprintf); |
| s.info.print_address_func = generic_print_host_address; |
| |
| s.info.buffer = code; |
| s.info.buffer_vma = (uintptr_t)code; |
| s.info.buffer_length = size; |
| |
| #ifdef HOST_WORDS_BIGENDIAN |
| s.info.endian = BFD_ENDIAN_BIG; |
| #else |
| s.info.endian = BFD_ENDIAN_LITTLE; |
| #endif |
| #if defined(CONFIG_TCG_INTERPRETER) |
| print_insn = print_insn_tci; |
| #elif defined(__i386__) |
| s.info.mach = bfd_mach_i386_i386; |
| print_insn = print_insn_i386; |
| #elif defined(__x86_64__) |
| s.info.mach = bfd_mach_x86_64; |
| print_insn = print_insn_i386; |
| #elif defined(_ARCH_PPC) |
| s.info.disassembler_options = (char *)"any"; |
| print_insn = print_insn_ppc; |
| #elif defined(__aarch64__) && defined(CONFIG_ARM_A64_DIS) |
| print_insn = print_insn_arm_a64; |
| #elif defined(__alpha__) |
| print_insn = print_insn_alpha; |
| #elif defined(__sparc__) |
| print_insn = print_insn_sparc; |
| s.info.mach = bfd_mach_sparc_v9b; |
| #elif defined(__arm__) |
| print_insn = print_insn_arm; |
| #elif defined(__MIPSEB__) |
| print_insn = print_insn_big_mips; |
| #elif defined(__MIPSEL__) |
| print_insn = print_insn_little_mips; |
| #elif defined(__m68k__) |
| print_insn = print_insn_m68k; |
| #elif defined(__s390__) |
| print_insn = print_insn_s390; |
| #elif defined(__hppa__) |
| print_insn = print_insn_hppa; |
| #endif |
| if (print_insn == NULL) { |
| print_insn = print_insn_od_host; |
| } |
| for (pc = (uintptr_t)code; size > 0; pc += count, size -= count) { |
| fprintf(out, "0x%08" PRIxPTR ": ", pc); |
| count = print_insn(pc, &s.info); |
| fprintf(out, "\n"); |
| if (count < 0) |
| break; |
| } |
| } |
| |
| /* Look up symbol for debugging purpose. Returns "" if unknown. */ |
| const char *lookup_symbol(target_ulong orig_addr) |
| { |
| const char *symbol = ""; |
| struct syminfo *s; |
| |
| for (s = syminfos; s; s = s->next) { |
| symbol = s->lookup_symbol(s, orig_addr); |
| if (symbol[0] != '\0') { |
| break; |
| } |
| } |
| |
| return symbol; |
| } |
| |
| #if !defined(CONFIG_USER_ONLY) |
| |
| #include "monitor/monitor.h" |
| |
| static int monitor_disas_is_physical; |
| |
| static int |
| monitor_read_memory (bfd_vma memaddr, bfd_byte *myaddr, int length, |
| struct disassemble_info *info) |
| { |
| CPUDebug *s = container_of(info, CPUDebug, info); |
| |
| if (monitor_disas_is_physical) { |
| cpu_physical_memory_read(memaddr, myaddr, length); |
| } else { |
| cpu_memory_rw_debug(s->cpu, memaddr, myaddr, length, 0); |
| } |
| return 0; |
| } |
| |
| /* Disassembler for the monitor. |
| See target_disas for a description of flags. */ |
| void monitor_disas(Monitor *mon, CPUState *cpu, |
| target_ulong pc, int nb_insn, int is_physical, int flags) |
| { |
| CPUClass *cc = CPU_GET_CLASS(cpu); |
| int count, i; |
| CPUDebug s; |
| |
| INIT_DISASSEMBLE_INFO(s.info, (FILE *)mon, monitor_fprintf); |
| |
| s.cpu = cpu; |
| monitor_disas_is_physical = is_physical; |
| s.info.read_memory_func = monitor_read_memory; |
| s.info.print_address_func = generic_print_address; |
| |
| s.info.buffer_vma = pc; |
| |
| #ifdef TARGET_WORDS_BIGENDIAN |
| s.info.endian = BFD_ENDIAN_BIG; |
| #else |
| s.info.endian = BFD_ENDIAN_LITTLE; |
| #endif |
| |
| if (cc->disas_set_info) { |
| cc->disas_set_info(cpu, &s.info); |
| } |
| |
| #if defined(TARGET_I386) |
| if (flags == 2) { |
| s.info.mach = bfd_mach_x86_64; |
| } else if (flags == 1) { |
| s.info.mach = bfd_mach_i386_i8086; |
| } else { |
| s.info.mach = bfd_mach_i386_i386; |
| } |
| s.info.print_insn = print_insn_i386; |
| #elif defined(TARGET_PPC) |
| if (flags & 0xFFFF) { |
| /* If we have a precise definition of the instruction set, use it. */ |
| s.info.mach = flags & 0xFFFF; |
| } else { |
| #ifdef TARGET_PPC64 |
| s.info.mach = bfd_mach_ppc64; |
| #else |
| s.info.mach = bfd_mach_ppc; |
| #endif |
| } |
| if ((flags >> 16) & 1) { |
| s.info.endian = BFD_ENDIAN_LITTLE; |
| } |
| s.info.print_insn = print_insn_ppc; |
| #endif |
| if (!s.info.print_insn) { |
| monitor_printf(mon, "0x" TARGET_FMT_lx |
| ": Asm output not supported on this arch\n", pc); |
| return; |
| } |
| |
| for(i = 0; i < nb_insn; i++) { |
| monitor_printf(mon, "0x" TARGET_FMT_lx ": ", pc); |
| count = s.info.print_insn(pc, &s.info); |
| monitor_printf(mon, "\n"); |
| if (count < 0) |
| break; |
| pc += count; |
| } |
| } |
| #endif |
