135 lines
2.5 KiB
C
135 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/***************************************************************************
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* Copyright (C) 2019 by Mete Balci *
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* metebalci@gmail.com *
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***************************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <helper/log.h>
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#include "target.h"
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#include "a64_disassembler.h"
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#if HAVE_CAPSTONE
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#include <capstone.h>
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static void print_opcode(struct command_invocation *cmd, const cs_insn *insn)
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{
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uint32_t opcode = 0;
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memcpy(&opcode, insn->bytes, insn->size);
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if (insn->size == 4) {
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uint16_t opcode_high = opcode >> 16;
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opcode = opcode & 0xffff;
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command_print(cmd,
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"0x%08" PRIx64" %04x %04x\t%s\t%s",
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insn->address,
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opcode,
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opcode_high,
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insn->mnemonic,
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insn->op_str);
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} else {
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command_print(
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cmd,
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"0x%08" PRIx64" %04x\t%s\t%s",
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insn->address,
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opcode,
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insn->mnemonic,
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insn->op_str);
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}
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}
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int a64_disassemble(struct command_invocation *cmd, struct target *target, target_addr_t address, size_t count)
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{
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int ret;
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int csret;
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csh handle;
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csret = cs_open(CS_ARCH_ARM64, CS_MODE_LITTLE_ENDIAN, &handle);
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if (csret != CS_ERR_OK) {
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LOG_ERROR("cs_open() failed: %s", cs_strerror(csret));
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return ERROR_FAIL;
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}
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csret = cs_option(handle, CS_OPT_SKIPDATA, CS_OPT_ON);
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if (csret != CS_ERR_OK) {
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LOG_ERROR("cs_option() failed: %s", cs_strerror(csret));
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cs_close(&handle);
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return ERROR_FAIL;
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}
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cs_insn *insn = cs_malloc(handle);
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if (csret != CS_ERR_OK) {
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LOG_ERROR("cs_malloc() failed: %s", cs_strerror(csret));
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cs_close(&handle);
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return ERROR_FAIL;
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}
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while (count > 0) {
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uint8_t buffer[4];
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ret = target_read_buffer(target, address, sizeof(buffer), buffer);
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if (ret != ERROR_OK) {
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cs_free(insn, 1);
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cs_close(&handle);
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return ret;
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}
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size_t size = sizeof(buffer);
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const uint8_t *tmp = buffer;
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ret = cs_disasm_iter(handle, &tmp, &size, &address, insn);
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if (!ret) {
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LOG_ERROR("cs_disasm_iter() failed: %s", cs_strerror(cs_errno(handle)));
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cs_free(insn, 1);
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cs_close(&handle);
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return ERROR_FAIL;
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}
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print_opcode(cmd, insn);
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count--;
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}
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cs_free(insn, 1);
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cs_close(&handle);
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return ERROR_OK;
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}
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#else
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int a64_disassemble(struct command_invocation *cmd, struct target *target, target_addr_t address, size_t count)
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{
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command_print(cmd, "capstone disassembly framework required");
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return ERROR_FAIL;
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}
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#endif
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