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disas: Dump insn bytes along with capstone disassembly 

This feature is present for some targets in the bfd disassembler(s).
Implement it generically for all capstone users.

Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2017-11-07 13:19:18 +01:00
parent b0fbe46ad8
commit 15fa1a0ae0
4 changed files with 94 additions and 12 deletions
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96
disas.c
View File

@ -220,6 +220,77 @@ static cs_err cap_disas_start(disassemble_info *info, csh *handle)
return CS_ERR_OK;
}
static void cap_dump_insn_units(disassemble_info *info, cs_insn *insn,
int i, int n)
{
fprintf_function print = info->fprintf_func;
FILE *stream = info->stream;
switch (info->cap_insn_unit) {
case 4:
if (info->endian == BFD_ENDIAN_BIG) {
for (; i < n; i += 4) {
print(stream, " %08x", ldl_be_p(insn->bytes + i));
}
} else {
for (; i < n; i += 4) {
print(stream, " %08x", ldl_le_p(insn->bytes + i));
}
}
break;
case 2:
if (info->endian == BFD_ENDIAN_BIG) {
for (; i < n; i += 2) {
print(stream, " %04x", lduw_be_p(insn->bytes + i));
}
} else {
for (; i < n; i += 2) {
print(stream, " %04x", lduw_le_p(insn->bytes + i));
}
}
break;
default:
for (; i < n; i++) {
print(stream, " %02x", insn->bytes[i]);
}
break;
}
}
static void cap_dump_insn(disassemble_info *info, cs_insn *insn)
{
fprintf_function print = info->fprintf_func;
int i, n, split;
print(info->stream, "0x%08" PRIx64 ": ", insn->address);
n = insn->size;
split = info->cap_insn_split;
/* Dump the first SPLIT bytes of the instruction. */
cap_dump_insn_units(info, insn, 0, MIN(n, split));
/* Add padding up to SPLIT so that mnemonics line up. */
if (n < split) {
int width = (split - n) / info->cap_insn_unit;
width *= (2 * info->cap_insn_unit + 1);
print(info->stream, "%*s", width, "");
}
/* Print the actual instruction. */
print(info->stream, " %-8s %s\n", insn->mnemonic, insn->op_str);
/* Dump any remaining part of the insn on subsequent lines. */
for (i = split; i < n; i += split) {
print(info->stream, "0x%08" PRIx64 ": ", insn->address + i);
cap_dump_insn_units(info, insn, i, MIN(n, i + split));
print(info->stream, "\n");
}
}
/* Disassemble SIZE bytes at PC for the target. */
static bool cap_disas_target(disassemble_info *info, uint64_t pc, size_t size)
{
@ -242,10 +313,7 @@ static bool cap_disas_target(disassemble_info *info, uint64_t pc, size_t size)
size -= tsize;
while (cs_disasm_iter(handle, &cbuf, &csize, &pc, insn)) {
(*info->fprintf_func)(info->stream,
"0x%08" PRIx64 ": %-12s %s\n",
insn->address, insn->mnemonic,
insn->op_str);
cap_dump_insn(info, insn);
}
/* If the target memory is not consumed, go back for more... */
@ -290,10 +358,7 @@ static bool cap_disas_host(disassemble_info *info, void *code, size_t size)
pc = (uintptr_t)code;
while (cs_disasm_iter(handle, &cbuf, &size, &pc, insn)) {
(*info->fprintf_func)(info->stream,
"0x%08" PRIx64 ": %-12s %s\n",
insn->address, insn->mnemonic,
insn->op_str);
cap_dump_insn(info, insn);
}
if (size != 0) {
(*info->fprintf_func)(info->stream,
@ -337,10 +402,7 @@ static bool cap_disas_monitor(disassemble_info *info, uint64_t pc, int count)
csize += tsize;
if (cs_disasm_iter(handle, &cbuf, &csize, &pc, insn)) {
(*info->fprintf_func)(info->stream,
"0x%08" PRIx64 ": %-12s %s\n",
insn->address, insn->mnemonic,
insn->op_str);
cap_dump_insn(info, insn);
if (--count <= 0) {
break;
}
@ -376,6 +438,8 @@ void target_disas(FILE *out, CPUState *cpu, target_ulong code,
s.info.print_address_func = generic_print_address;
s.info.cap_arch = -1;
s.info.cap_mode = 0;
s.info.cap_insn_unit = 4;
s.info.cap_insn_split = 4;
#ifdef TARGET_WORDS_BIGENDIAN
s.info.endian = BFD_ENDIAN_BIG;
@ -427,6 +491,8 @@ void disas(FILE *out, void *code, unsigned long size)
s.info.buffer_length = size;
s.info.cap_arch = -1;
s.info.cap_mode = 0;
s.info.cap_insn_unit = 4;
s.info.cap_insn_split = 4;
#ifdef HOST_WORDS_BIGENDIAN
s.info.endian = BFD_ENDIAN_BIG;
@ -440,11 +506,15 @@ void disas(FILE *out, void *code, unsigned long size)
print_insn = print_insn_i386;
s.info.cap_arch = CS_ARCH_X86;
s.info.cap_mode = CS_MODE_32;
s.info.cap_insn_unit = 1;
s.info.cap_insn_split = 8;
#elif defined(__x86_64__)
s.info.mach = bfd_mach_x86_64;
print_insn = print_insn_i386;
s.info.cap_arch = CS_ARCH_X86;
s.info.cap_mode = CS_MODE_64;
s.info.cap_insn_unit = 1;
s.info.cap_insn_split = 8;
#elif defined(_ARCH_PPC)
s.info.disassembler_options = (char *)"any";
print_insn = print_insn_ppc;
@ -537,6 +607,8 @@ void monitor_disas(Monitor *mon, CPUState *cpu,
s.info.buffer_vma = pc;
s.info.cap_arch = -1;
s.info.cap_mode = 0;
s.info.cap_insn_unit = 4;
s.info.cap_insn_split = 4;
#ifdef TARGET_WORDS_BIGENDIAN
s.info.endian = BFD_ENDIAN_BIG;

2
include/disas/bfd.h
View File

@ -374,6 +374,8 @@ typedef struct disassemble_info {
/* Options for Capstone disassembly. */
int cap_arch;
int cap_mode;
int cap_insn_unit;
int cap_insn_split;
} disassemble_info;

6
target/arm/cpu.c
View File

@ -489,13 +489,19 @@ static void arm_disas_set_info(CPUState *cpu, disassemble_info *info)
info->print_insn = print_insn_arm_a64;
#endif
info->cap_arch = CS_ARCH_ARM64;
info->cap_insn_unit = 4;
info->cap_insn_split = 4;
} else {
int cap_mode;
if (env->thumb) {
info->print_insn = print_insn_thumb1;
info->cap_insn_unit = 2;
info->cap_insn_split = 4;
cap_mode = CS_MODE_THUMB;
} else {
info->print_insn = print_insn_arm;
info->cap_insn_unit = 4;
info->cap_insn_split = 4;
cap_mode = CS_MODE_ARM;
}
if (arm_feature(env, ARM_FEATURE_V8)) {

2
target/i386/cpu.c
View File

@ -4109,6 +4109,8 @@ static void x86_disas_set_info(CPUState *cs, disassemble_info *info)
info->cap_mode = (env->hflags & HF_CS64_MASK ? CS_MODE_64
: env->hflags & HF_CS32_MASK ? CS_MODE_32
: CS_MODE_16);
info->cap_insn_unit = 1;
info->cap_insn_split = 8;
}
static Property x86_cpu_properties[] = {