| 1 | /* |
| 2 | * Routines for host instruction disassembly. |
| 3 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 4 | */ |
| 5 | |
| 6 | #include "qemu/osdep.h" |
| 7 | #include "disas/disas.h" |
| 8 | #include "disas/capstone.h" |
| 9 | #include "disas-internal.h" |
| 10 | |
| 11 | |
| 12 | /* |
| 13 | * Get LENGTH bytes from info's buffer, at host address memaddr. |
| 14 | * Transfer them to myaddr. |
| 15 | */ |
| 16 | static int host_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length, |
| 17 | struct disassemble_info *info) |
| 18 | { |
| 19 | if (memaddr < info->buffer_vma |
| 20 | || memaddr + length > info->buffer_vma + info->buffer_length) { |
| 21 | /* Out of bounds. Use EIO because GDB uses it. */ |
| 22 | return EIO; |
| 23 | } |
| 24 | memcpy (myaddr, info->buffer + (memaddr - info->buffer_vma), length); |
| 25 | return 0; |
| 26 | } |
| 27 | |
| 28 | /* Print address in hex, truncated to the width of a host virtual address. */ |
| 29 | static void host_print_address(bfd_vma addr, struct disassemble_info *info) |
| 30 | { |
| 31 | info->fprintf_func(info->stream, "0x%" PRIxPTR, (uintptr_t)addr); |
| 32 | } |
| 33 | |
| 34 | static void initialize_debug_host(CPUDebug *s) |
| 35 | { |
| 36 | disas_initialize_debug(s); |
| 37 | |
| 38 | s->info.read_memory_func = host_read_memory; |
| 39 | s->info.print_address_func = host_print_address; |
| 40 | #if HOST_BIG_ENDIAN |
| 41 | s->info.endian = BFD_ENDIAN_BIG; |
| 42 | #else |
| 43 | s->info.endian = BFD_ENDIAN_LITTLE; |
| 44 | #endif |
| 45 | #if defined(CONFIG_TCG_INTERPRETER) |
| 46 | s->info.print_insn = print_insn_tci; |
| 47 | #elif defined(__x86_64__) |
| 48 | s->info.mach = bfd_mach_x86_64; |
| 49 | s->info.cap_arch = CS_ARCH_X86; |
| 50 | s->info.cap_mode = CS_MODE_64; |
| 51 | s->info.cap_insn_unit = 1; |
| 52 | s->info.cap_insn_split = 8; |
| 53 | #elif defined(_ARCH_PPC64) |
| 54 | s->info.cap_arch = CS_ARCH_PPC; |
| 55 | s->info.cap_mode = CS_MODE_64; |
| 56 | #elif defined(__riscv) |
| 57 | #if defined(_ILP32) || (__riscv_xlen == 32) |
| 58 | s->info.print_insn = print_insn_riscv32; |
| 59 | #elif defined(_LP64) |
| 60 | s->info.print_insn = print_insn_riscv64; |
| 61 | #else |
| 62 | #error unsupported RISC-V ABI |
| 63 | #endif |
| 64 | #elif defined(__aarch64__) |
| 65 | s->info.cap_arch = CS_ARCH_ARM64; |
| 66 | #elif defined(__alpha__) |
| 67 | s->info.print_insn = print_insn_alpha; |
| 68 | #elif defined(__sparc__) |
| 69 | s->info.print_insn = print_insn_sparc; |
| 70 | s->info.mach = bfd_mach_sparc_v9b; |
| 71 | #elif defined(__MIPSEB__) |
| 72 | s->info.print_insn = print_insn_big_mips; |
| 73 | #elif defined(__MIPSEL__) |
| 74 | s->info.print_insn = print_insn_little_mips; |
| 75 | #elif defined(__m68k__) |
| 76 | s->info.print_insn = print_insn_m68k; |
| 77 | #elif defined(__s390x__) |
| 78 | s->info.cap_arch = CS_ARCH_SYSTEMZ; |
| 79 | s->info.cap_insn_unit = 2; |
| 80 | s->info.cap_insn_split = 6; |
| 81 | #elif defined(__hppa__) |
| 82 | s->info.print_insn = print_insn_hppa; |
| 83 | #elif defined(__loongarch__) |
| 84 | s->info.print_insn = print_insn_loongarch; |
| 85 | #endif |
| 86 | } |
| 87 | |
| 88 | /* Disassemble this for me please... (debugging). */ |
| 89 | void disas(FILE *out, const void *code, size_t size) |
| 90 | { |
| 91 | uintptr_t pc; |
| 92 | int count; |
| 93 | CPUDebug s; |
| 94 | |
| 95 | initialize_debug_host(&s); |
| 96 | s.info.fprintf_func = fprintf; |
| 97 | s.info.stream = out; |
| 98 | s.info.buffer = code; |
| 99 | s.info.buffer_vma = (uintptr_t)code; |
| 100 | s.info.buffer_length = size; |
| 101 | s.info.show_opcodes = true; |
| 102 | |
| 103 | if (s.info.cap_arch >= 0 && cap_disas_host(&s.info, code, size)) { |
| 104 | return; |
| 105 | } |
| 106 | |
| 107 | if (s.info.print_insn == NULL) { |
| 108 | s.info.print_insn = print_insn_od_host; |
| 109 | } |
| 110 | for (pc = (uintptr_t)code; size > 0; pc += count, size -= count) { |
| 111 | fprintf(out, "0x%08" PRIxPTR ": ", pc); |
| 112 | count = s.info.print_insn(pc, &s.info); |
| 113 | fprintf(out, "\n"); |
| 114 | if (count < 0) { |
| 115 | break; |
| 116 | } |
| 117 | } |
| 118 | } |