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5c236fa0e3
Better mips analysis Implemented mips pseudocode plugin Change asm.parser in asm.arch callback
235 lines
6.4 KiB
C
235 lines
6.4 KiB
C
/* radare - LGPL - Copyright 2010-2011 */
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/* nibble<.ds@gmail.com> + pancake<nopcode.org> */
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#include <r_anal.h>
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#include <r_util.h>
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#include <r_list.h>
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R_API RAnalOp *r_anal_op_new() {
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RAnalOp *op = R_NEW (RAnalOp);
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if (op) {
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memset (op, 0, sizeof (RAnalOp));
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op->mnemonic = NULL;
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op->addr = -1;
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op->jump = -1;
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op->fail = -1;
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op->ref = -1;
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op->value = -1;
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op->next = NULL;
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}
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return op;
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}
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R_API RList *r_anal_op_list_new() {
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RList *list = r_list_new ();
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list->free = &r_anal_op_free;
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return list;
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}
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R_API void r_anal_op_fini(RAnalOp *op) {
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if (op->src[0]) r_anal_value_free (op->src[0]);
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if (op->src[1]) r_anal_value_free (op->src[1]);
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if (op->src[2]) r_anal_value_free (op->src[2]);
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if (op->dst) r_anal_value_free (op->dst);
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free (op->mnemonic);
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op->mnemonic = NULL;
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//op->src[0] = op->src[1] = op->src[2] = op->dst = NULL;
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memset (op, 0, sizeof (RAnalOp));
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}
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R_API void r_anal_op_free(void *_op) {
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if (!_op) return;
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r_anal_op_fini (_op);
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free (_op);
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}
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R_API int r_anal_op(RAnal *anal, RAnalOp *op, ut64 addr, const ut8 *data, int len) {
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if (len>0 && anal && op && anal->cur && anal->cur->op)
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return anal->cur->op (anal, op, addr, data, len);
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return R_FALSE;
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}
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R_API RAnalOp *r_anal_op_copy (RAnalOp *op) {
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RAnalOp *nop = R_NEW (RAnalOp);
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memcpy (nop, op, sizeof (RAnalOp));
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nop->mnemonic = strdup (op->mnemonic);
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nop->src[0] = r_anal_value_copy (op->src[0]);
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nop->src[1] = r_anal_value_copy (op->src[1]);
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nop->src[2] = r_anal_value_copy (op->src[2]);
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nop->dst = r_anal_value_copy (op->dst);
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return nop;
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}
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// TODO: return RAnalException *
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R_API int r_anal_op_execute (RAnal *anal, RAnalOp *op) {
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while (op) {
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if (op->delay>0) {
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anal->queued = r_anal_op_copy (op);
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return R_FALSE;
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}
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switch (op->type) {
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case R_ANAL_OP_TYPE_JMP:
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case R_ANAL_OP_TYPE_UJMP:
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case R_ANAL_OP_TYPE_CALL:
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break;
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case R_ANAL_OP_TYPE_ADD:
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// dst = src[0] + src[1] + src[2]
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r_anal_value_set_ut64 (anal, op->dst,
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r_anal_value_to_ut64 (anal, op->src[0])+
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r_anal_value_to_ut64 (anal, op->src[1])+
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r_anal_value_to_ut64 (anal, op->src[2]));
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break;
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case R_ANAL_OP_TYPE_SUB:
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// dst = src[0] + src[1] + src[2]
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r_anal_value_set_ut64 (anal, op->dst,
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r_anal_value_to_ut64 (anal, op->src[0])-
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r_anal_value_to_ut64 (anal, op->src[1])-
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r_anal_value_to_ut64 (anal, op->src[2]));
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break;
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case R_ANAL_OP_TYPE_DIV:
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{
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ut64 div = r_anal_value_to_ut64 (anal, op->src[1]);
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if (div == 0) {
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eprintf ("r_anal_op_execute: division by zero\n");
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eprintf ("TODO: throw RAnalException\n");
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} else r_anal_value_set_ut64 (anal, op->dst,
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r_anal_value_to_ut64 (anal, op->src[0])/div);
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}
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break;
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case R_ANAL_OP_TYPE_MUL:
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r_anal_value_set_ut64 (anal, op->dst,
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r_anal_value_to_ut64 (anal, op->src[0])*
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r_anal_value_to_ut64 (anal, op->src[1]));
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break;
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case R_ANAL_OP_TYPE_MOV:
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// dst = src[0]
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r_anal_value_set_ut64 (anal, op->dst,
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r_anal_value_to_ut64 (anal, op->src[0]));
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break;
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case R_ANAL_OP_TYPE_NOP:
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// do nothing
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break;
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}
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op = op->next;
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}
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if (anal->queued) {
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if (op && op->delay>0) {
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eprintf ("Exception! two consecutive delayed instructions\n");
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return R_FALSE;
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}
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anal->queued->delay--;
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if (anal->queued->delay == 0) {
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r_anal_op_execute (anal, anal->queued);
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r_anal_op_free (anal->queued);
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anal->queued = NULL;
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}
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}
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return R_TRUE;
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}
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R_API char *r_anal_op_to_string(RAnal *anal, RAnalOp *op) {
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RAnalFunction *f;
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char ret[128];
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char *cstr;
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char *r0 = r_anal_value_to_string (op->dst);
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char *a0 = r_anal_value_to_string (op->src[0]);
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char *a1 = r_anal_value_to_string (op->src[1]);
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switch (op->type) {
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case R_ANAL_OP_TYPE_MOV:
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snprintf (ret, sizeof (ret), "%s = %s", r0, a0);
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break;
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case R_ANAL_OP_TYPE_CJMP:
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{
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RAnalBlock *bb = r_anal_bb_from_offset (anal, op->addr);
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if (bb) {
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cstr = r_anal_cond_to_string (bb->cond);
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snprintf (ret, sizeof (ret), "if (%s) goto 0x%"PFMT64x, cstr, op->jump);
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free (cstr);
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} else snprintf (ret, sizeof (ret), "if (%s) goto 0x%"PFMT64x, "unk", op->jump);
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}
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break;
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case R_ANAL_OP_TYPE_JMP:
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snprintf (ret, sizeof (ret), "goto 0x%"PFMT64x, op->jump);
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break;
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case R_ANAL_OP_TYPE_UJMP:
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snprintf (ret, sizeof (ret), "goto %s", r0);
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break;
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case R_ANAL_OP_TYPE_PUSH:
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case R_ANAL_OP_TYPE_UPUSH:
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snprintf (ret, sizeof (ret), "push %s", a0);
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break;
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case R_ANAL_OP_TYPE_POP:
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snprintf (ret, sizeof (ret), "pop %s", r0);
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break;
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case R_ANAL_OP_TYPE_UCALL:
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snprintf (ret, sizeof (ret), "%s()", r0);
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break;
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case R_ANAL_OP_TYPE_CALL:
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f = r_anal_fcn_find (anal, op->jump, R_ANAL_FCN_TYPE_NULL);
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if (f) snprintf (ret, sizeof (ret), "%s()", f->name);
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else snprintf (ret, sizeof (ret), "0x%"PFMT64x"()", op->jump);
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break;
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case R_ANAL_OP_TYPE_ADD:
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if (a1 == NULL || !strcmp (a0, a1))
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snprintf (ret, sizeof (ret), "%s += %s", r0, a0);
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else snprintf (ret, sizeof (ret), "%s = %s + %s", r0, a0, a1);
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break;
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case R_ANAL_OP_TYPE_SUB:
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if (a1 == NULL || !strcmp (a0, a1))
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snprintf (ret, sizeof (ret), "%s -= %s", r0, a0);
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else snprintf (ret, sizeof (ret), "%s = %s - %s", r0, a0, a1);
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break;
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case R_ANAL_OP_TYPE_MUL:
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if (a1 == NULL || !strcmp (a0, a1))
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snprintf (ret, sizeof (ret), "%s *= %s", r0, a0);
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else snprintf (ret, sizeof (ret), "%s = %s * %s", r0, a0, a1);
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break;
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case R_ANAL_OP_TYPE_DIV:
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if (a1 == NULL || !strcmp (a0, a1))
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snprintf (ret, sizeof (ret), "%s /= %s", r0, a0);
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else snprintf (ret, sizeof (ret), "%s = %s / %s", r0, a0, a1);
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break;
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case R_ANAL_OP_TYPE_AND:
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if (a1 == NULL || !strcmp (a0, a1))
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snprintf (ret, sizeof (ret), "%s &= %s", r0, a0);
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else snprintf (ret, sizeof (ret), "%s = %s & %s", r0, a0, a1);
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break;
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case R_ANAL_OP_TYPE_OR:
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if (a1 == NULL || !strcmp (a0, a1))
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snprintf (ret, sizeof (ret), "%s |= %s", r0, a0);
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else snprintf (ret, sizeof (ret), "%s = %s | %s", r0, a0, a1);
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break;
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case R_ANAL_OP_TYPE_XOR:
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if (a1 == NULL || !strcmp (a0, a1))
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snprintf (ret, sizeof (ret), "%s ^= %s", r0, a0);
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else snprintf (ret, sizeof (ret), "%s = %s ^ %s", r0, a0, a1);
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break;
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case R_ANAL_OP_TYPE_LEA:
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snprintf (ret, sizeof (ret), "%s -> %s", r0, a0);
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break;
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case R_ANAL_OP_TYPE_CMP:
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memcpy (ret, ";", 2);
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break;
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case R_ANAL_OP_TYPE_NOP:
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memcpy (ret, "nop", 4);
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break;
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case R_ANAL_OP_TYPE_RET:
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memcpy (ret, "ret", 4);
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break;
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case R_ANAL_OP_TYPE_LEAVE:
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memcpy (ret, "leave", 6);
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break;
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default:
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free (r0);
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free (a0);
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free (a1);
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return NULL;
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}
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free (r0);
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free (a0);
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free (a1);
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return strdup (ret);
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}
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