diff options
| -rw-r--r-- | disas.c | 55 |
1 files changed, 19 insertions, 36 deletions
@@ -493,13 +493,12 @@ void target_disas(FILE *out, CPUState *cpu, target_ulong code, } } -static __thread GString plugin_disas_output; - static int plugin_printf(FILE *stream, const char *fmt, ...) { - va_list va; - GString *s = &plugin_disas_output; + /* We abuse the FILE parameter to pass a GString. */ + GString *s = (GString *)stream; int initial_len = s->len; + va_list va; va_start(va, fmt); g_string_append_vprintf(s, fmt, va); @@ -519,28 +518,20 @@ static void plugin_print_address(bfd_vma addr, struct disassemble_info *info) static bool cap_disas_plugin(disassemble_info *info, uint64_t pc, size_t size) { - uint8_t cap_buf[1024]; + uint8_t cap_buf[64]; + const uint8_t *cbuf = cap_buf; csh handle; - cs_insn *insn; - size_t csize = 0; - int count; - GString *s = &plugin_disas_output; if (cap_disas_start(info, &handle) != CS_ERR_OK) { return false; } - insn = cap_insn; - - size_t tsize = MIN(sizeof(cap_buf) - csize, size); - const uint8_t *cbuf = cap_buf; - target_read_memory(pc, cap_buf, tsize, info); - count = cs_disasm(handle, cbuf, size, 0, 1, &insn); + assert(size < sizeof(cap_buf)); + target_read_memory(pc, cap_buf, size, info); - if (count) { - g_string_printf(s, "%s %s", insn->mnemonic, insn->op_str); - } else { - g_string_printf(s, "cs_disasm failed"); + if (cs_disasm_iter(handle, &cbuf, &size, &pc, cap_insn)) { + GString *s = (GString *)info->stream; + g_string_printf(s, "%s %s", cap_insn->mnemonic, cap_insn->op_str); } cs_close(&handle); @@ -555,34 +546,26 @@ bool cap_disas_plugin(disassemble_info *info, uint64_t pc, size_t size) */ char *plugin_disas(CPUState *cpu, uint64_t addr, size_t size) { - int count; CPUDebug s; - GString *ds = g_string_set_size(&plugin_disas_output, 0); - - g_assert(ds == &plugin_disas_output); + GString *ds = g_string_new(NULL); initialize_debug_target(&s, cpu); s.info.fprintf_func = plugin_printf; + s.info.stream = (FILE *)ds; /* abuse this slot */ s.info.buffer_vma = addr; s.info.buffer_length = size; s.info.print_address_func = plugin_print_address; if (s.info.cap_arch >= 0 && cap_disas_plugin(&s.info, addr, size)) { - return g_strdup(ds->str); - } - - if (s.info.print_insn == NULL) { - s.info.print_insn = print_insn_od_target; - } - - count = s.info.print_insn(addr, &s.info); - - /* The decoder probably read more than it needed it's not critical */ - if (count < size) { - warn_report("%s: %zu bytes left over", __func__, size - count); + ; /* done */ + } else if (s.info.print_insn) { + s.info.print_insn(addr, &s.info); + } else { + ; /* cannot disassemble -- return empty string */ } - return g_strdup(ds->str); + /* Return the buffer, freeing the GString container. */ + return g_string_free(ds, false); } /* Disassemble this for me please... (debugging). */ |