141 lines
3.1 KiB
C
141 lines
3.1 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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#include <rz_asm.h>
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#include <rz_lib.h>
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#include <capstone/capstone.h>
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#include "../arch/ppc/libvle/vle.h"
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#include "../arch/ppc/libps/libps.h"
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static csh handle = 0;
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static bool the_end(void *p) {
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if (handle) {
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cs_close(&handle);
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handle = 0;
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}
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return true;
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}
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static int decompile_vle(RzAsm *a, RzAsmOp *op, const ut8 *buf, int len) {
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vle_t *instr = 0;
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vle_handle handle = { 0 };
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if (len < 2) {
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return -1;
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}
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if (!vle_init(&handle, buf, len) && (instr = vle_next(&handle))) {
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op->size = instr->size;
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char buf_asm[64];
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vle_snprint(buf_asm, sizeof(buf_asm), a->pc, instr);
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rz_asm_op_set_asm(op, buf_asm);
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vle_free(instr);
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} else {
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rz_asm_op_set_asm(op, "invalid");
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op->size = 2;
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return -1;
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}
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return op->size;
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}
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static int decompile_ps(RzAsm *a, RzAsmOp *op, const ut8 *buf, int len) {
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ppcps_t instr = { 0 };
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if (len < 4) {
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return -1;
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}
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op->size = 4;
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const ut32 data = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
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if (libps_decode(data, &instr) < 1) {
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rz_asm_op_set_asm(op, "invalid");
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return -1;
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}
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char buf_asm[64];
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libps_snprint(buf_asm, sizeof(buf_asm), a->pc, &instr);
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rz_asm_op_set_asm(op, buf_asm);
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return op->size;
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}
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static int disassemble(RzAsm *a, RzAsmOp *op, const ut8 *buf, int len) {
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static int omode = -1, obits = -1;
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int n, ret, mode;
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ut64 off = a->pc;
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cs_insn *insn;
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if (a->cpu && strncmp(a->cpu, "vle", 3) == 0) {
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// vle is big-endian only
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if (!a->big_endian) {
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return -1;
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}
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ret = decompile_vle(a, op, buf, len);
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if (ret >= 0) {
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return op->size;
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}
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} else if (a->cpu && strncmp(a->cpu, "ps", 2) == 0) {
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// libps is big-endian only
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if (!a->big_endian) {
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return -1;
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}
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ret = decompile_ps(a, op, buf, len);
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if (ret >= 0) {
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return op->size;
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}
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}
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switch (a->bits) {
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case 32:
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mode = CS_MODE_32;
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break;
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case 64:
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mode = CS_MODE_64;
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break;
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default:
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mode = 0;
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break;
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}
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mode |= a->big_endian ? CS_MODE_BIG_ENDIAN : CS_MODE_LITTLE_ENDIAN;
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if (mode != omode || a->bits != obits) {
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cs_close(&handle);
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handle = 0;
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omode = mode;
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obits = a->bits;
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}
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if (handle == 0) {
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ret = cs_open(CS_ARCH_PPC, mode, &handle);
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if (ret != CS_ERR_OK) {
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return -1;
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}
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}
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op->size = 4;
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cs_option(handle, CS_OPT_DETAIL, CS_OPT_OFF);
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n = cs_disasm(handle, (const ut8 *)buf, len, off, 1, &insn);
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op->size = 4;
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if (n > 0 && insn->size > 0) {
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const char *opstr = sdb_fmt("%s%s%s", insn->mnemonic,
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insn->op_str[0] ? " " : "", insn->op_str);
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rz_asm_op_set_asm(op, opstr);
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cs_free(insn, n);
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return op->size;
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}
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rz_asm_op_set_asm(op, "invalid");
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op->size = 4;
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cs_free(insn, n);
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return op->size;
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}
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RzAsmPlugin rz_asm_plugin_ppc_cs = {
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.name = "ppc",
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.desc = "Capstone PowerPC disassembler",
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.license = "BSD",
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.author = "pancake",
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.arch = "ppc",
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.cpus = "ppc,vle,ps",
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.bits = 32 | 64,
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.endian = RZ_SYS_ENDIAN_LITTLE | RZ_SYS_ENDIAN_BIG,
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.fini = the_end,
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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_ppc_cs,
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.version = RZ_VERSION
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};
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#endif
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