rizin/librz/arch/p-asm/asm_xtensa.c
2024-03-07 18:38:49 +08:00

85 lines
2.2 KiB
C

// SPDX-FileCopyrightText: 2016-2018 pancake <pancake@nopcode.org>
// SPDX-License-Identifier: LGPL-3.0-only
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <rz_types.h>
#include <rz_lib.h>
#include <rz_util.h>
#include <rz_asm.h>
#include "disas-asm.h"
#define INSN_BUFFER_SIZE 4
static ut64 offset = 0;
static RzStrBuf *buf_global = NULL;
static ut8 bytes[INSN_BUFFER_SIZE];
static int xtensa_buffer_read_memory(bfd_vma memaddr, bfd_byte *myaddr, ut32 length, struct disassemble_info *info) {
if (length > INSN_BUFFER_SIZE) {
length = INSN_BUFFER_SIZE;
}
memcpy(myaddr, bytes, length);
return 0;
}
static int symbol_at_address(bfd_vma addr, struct disassemble_info *info) {
return 0;
}
static void memory_error_func(int status, bfd_vma memaddr, struct disassemble_info *info) {
//--
}
DECLARE_GENERIC_PRINT_ADDRESS_FUNC()
DECLARE_GENERIC_FPRINTF_FUNC()
static int disassemble(RzAsm *a, RzAsmOp *op, const ut8 *buf, int len) {
struct disassemble_info disasm_obj;
buf_global = &op->buf_asm;
offset = a->pc;
if (len > INSN_BUFFER_SIZE) {
len = INSN_BUFFER_SIZE;
}
memcpy(bytes, buf, len); // TODO handle thumb
/* prepare disassembler */
memset(&disasm_obj, '\0', sizeof(struct disassemble_info));
disasm_obj.disassembler_options = (a->bits == 64) ? "64" : "";
disasm_obj.buffer = bytes;
disasm_obj.buffer_length = len;
disasm_obj.read_memory_func = &xtensa_buffer_read_memory;
disasm_obj.symbol_at_address_func = &symbol_at_address;
disasm_obj.memory_error_func = &memory_error_func;
disasm_obj.print_address_func = &generic_print_address_func;
disasm_obj.endian = !a->big_endian;
disasm_obj.fprintf_func = &generic_fprintf_func;
disasm_obj.stream = stdout;
op->size = print_insn_xtensa((bfd_vma)offset, &disasm_obj);
if (op->size == -1) {
rz_asm_op_set_asm(op, "(data)");
}
return op->size;
}
RzAsmPlugin rz_asm_plugin_xtensa = {
.name = "xtensa",
.arch = "xtensa",
.license = "GPL3",
.bits = 32,
.endian = RZ_SYS_ENDIAN_LITTLE | RZ_SYS_ENDIAN_BIG,
.desc = "XTensa CPU",
.disassemble = &disassemble
};
#ifndef RZ_PLUGIN_INCORE
RZ_API RzLibStruct rizin_plugin = {
.type = RZ_LIB_TYPE_ASM,
.data = &rz_asm_plugin_xtensa,
.version = RZ_VERSION
};
#endif