148 lines
4.1 KiB
C
148 lines
4.1 KiB
C
// SPDX-FileCopyrightText: 2014-2018 pancake <pancake@nopcode.org>
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// SPDX-License-Identifier: LGPL-3.0-only
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#if 0
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Documentation
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-------------
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http://developer.axis.com/old/documentation/hw/etraxfs/des_ref/des_ref.pdf
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http://developer.axis.com/old/documentation/hw/etraxfs/iop_howto/iop_howto.pdf
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#endif
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <rz_types.h>
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#include <rz_lib.h>
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#include <rz_util.h>
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#include <rz_asm.h>
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#include "disas-asm.h"
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static unsigned long Offset = 0;
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static RzStrBuf *buf_global = NULL;
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static unsigned char bytes[8];
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static int cris_buffer_read_memory(bfd_vma memaddr, bfd_byte *myaddr, ut32 length, struct disassemble_info *info) {
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int delta = (memaddr - Offset);
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if (delta < 0) {
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return -1; // disable backward reads
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}
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if ((delta + length) > 8) {
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return -1;
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}
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memcpy(myaddr, bytes + delta, length);
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return 0;
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}
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static int symbol_at_address(bfd_vma addr, struct disassemble_info *info) {
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return 0;
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}
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static void memory_error_func(int status, bfd_vma memaddr, struct disassemble_info *info) {
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//--
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}
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DECLARE_GENERIC_PRINT_ADDRESS_FUNC()
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DECLARE_GENERIC_FPRINTF_FUNC()
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bfd_boolean cris_parse_disassembler_options(disassemble_info *info, int distype);
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// TODO: refactor the gnu code to have a getter instead of exposing so many disasm entrypoints
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int print_insn_crisv10_v32_with_register_prefix(bfd_vma vma, disassemble_info *info);
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int print_insn_crisv10_v32_without_register_prefix(bfd_vma vma, disassemble_info *info);
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int print_insn_cris_with_register_prefix(bfd_vma vma, disassemble_info *info);
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int print_insn_cris_without_register_prefix(bfd_vma vma, disassemble_info *info);
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int print_insn_crisv32_with_register_prefix(bfd_vma vma, disassemble_info *info);
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int print_insn_crisv32_without_register_prefix(bfd_vma vma, disassemble_info *info);
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static int disassemble(RzAsm *a, RzAsmOp *op, const ut8 *buf, int len) {
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struct disassemble_info disasm_obj;
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int mode = 2;
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if (len < 4) {
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return -1;
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}
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buf_global = &op->buf_asm;
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Offset = a->pc;
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memcpy(bytes, buf, RZ_MIN(len, 8)); // TODO handle thumb
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/* prepare disassembler */
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memset(&disasm_obj, '\0', sizeof(struct disassemble_info));
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disasm_obj.disassembler_options = (a->bits == 64) ? "64" : "";
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disasm_obj.buffer = bytes;
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disasm_obj.read_memory_func = &cris_buffer_read_memory;
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disasm_obj.symbol_at_address_func = &symbol_at_address;
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disasm_obj.memory_error_func = &memory_error_func;
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disasm_obj.print_address_func = &generic_print_address_func;
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disasm_obj.endian = !a->big_endian;
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disasm_obj.fprintf_func = &generic_fprintf_func;
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disasm_obj.stream = stdout;
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if (a->cpu && *a->cpu) {
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// enum cris_disass_family { cris_dis_v0_v10, cris_dis_common_v10_v32, cris_dis_v32 };
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// 0: v0-v10
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// 1: v10-v32
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// 2: v32
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mode = 0;
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if (strstr(a->cpu, "v10")) {
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mode = 1;
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}
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if (strstr(a->cpu, "v32")) {
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mode = 2;
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}
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} else {
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mode = 2;
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}
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(void)cris_parse_disassembler_options(&disasm_obj, mode);
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if (a->syntax == RZ_ASM_SYNTAX_ATT) {
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switch (mode) {
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case 0:
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op->size = print_insn_cris_with_register_prefix((bfd_vma)Offset, &disasm_obj);
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break;
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case 1:
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op->size = print_insn_crisv10_v32_with_register_prefix((bfd_vma)Offset, &disasm_obj);
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break;
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default:
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op->size = print_insn_crisv32_with_register_prefix((bfd_vma)Offset, &disasm_obj);
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break;
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}
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} else {
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switch (mode) {
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case 0:
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op->size = print_insn_cris_without_register_prefix((bfd_vma)Offset, &disasm_obj);
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break;
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case 1:
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op->size = print_insn_crisv10_v32_without_register_prefix((bfd_vma)Offset, &disasm_obj);
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break;
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default:
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op->size = print_insn_crisv32_without_register_prefix((bfd_vma)Offset, &disasm_obj);
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break;
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}
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}
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if (op->size == -1) {
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rz_strbuf_set(&op->buf_asm, "(data)");
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}
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return op->size;
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}
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RzAsmPlugin rz_asm_plugin_cris_gnu = {
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.name = "cris",
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.arch = "cris",
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.cpus = "v0,v10,v32",
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.license = "GPL3",
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.author = "pancake",
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.bits = 32,
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.endian = RZ_SYS_ENDIAN_LITTLE,
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.desc = "Axis Communications 32-bit embedded processor",
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.disassemble = &disassemble
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};
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#ifndef RZ_PLUGIN_INCORE
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RZ_API RzLibStruct rizin_plugin = {
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.type = RZ_LIB_TYPE_ASM,
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.data = &rz_asm_plugin_cris_gnu,
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.version = RZ_VERSION
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};
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#endif
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