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Implement stackptr analysis in MIPS and add ALIGN stackop type

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This commit is contained in:
pancake 2016-04-13 23:33:30 +02:00
parent c28dce2359
commit 20b49f1615
4 changed files with 12 additions and 2 deletions
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1
libr/anal/anal.c
View File

@ -75,7 +75,6 @@ static int meta_count_for(void *user, int idx) {
R_API RAnal *r_anal_new() {
int i;
RAnalPlugin *static_plugin;
RAnal *anal = R_NEW0 (RAnal);
if (!anal) return NULL;
anal->os = strdup (R_SYS_OS);

8
libr/anal/p/anal_mips_cs.c
View File

@ -8,6 +8,7 @@
// http://www.mrc.uidaho.edu/mrc/people/jff/digital/MIPSir.html
#define OPERAND(x) insn->detail->mips.operands[x]
#define REGID(x) insn->detail->mips.operands[x].reg
#define REG(x) cs_reg_name (*handle, insn->detail->mips.operands[x].reg)
#define IMM(x) insn->detail->mips.operands[x].imm
#define MEMBASE(x) cs_reg_name(*handle, insn->detail->mips.operands[x].mem.base)
@ -692,6 +693,10 @@ static int analop(RAnal *anal, RAnalOp *op, ut64 addr, const ut8 *buf, int len)
SET_VAL (op, 2);
SET_SRC_DST_3_REG_OR_IMM (op);
op->type = R_ANAL_OP_TYPE_ADD;
if (REGID(0) == MIPS_REG_SP) {
op->stackop = R_ANAL_STACK_INC;
op->stackptr = -IMM(2);
}
break;
case MIPS_INS_SUB:
case MIPS_INS_SUBV:
@ -729,6 +734,9 @@ static int analop(RAnal *anal, RAnalOp *op, ut64 addr, const ut8 *buf, int len)
SET_VAL (op,2);
SET_SRC_DST_3_REG_OR_IMM (op);
op->type = R_ANAL_OP_TYPE_AND;
if (REGID(0) == MIPS_REG_SP) {
op->stackop = R_ANAL_STACK_ALIGN;
}
break;
case MIPS_INS_NOT:
op->type = R_ANAL_OP_TYPE_NOT;

4
libr/core/disasm.c
View File

@ -1376,7 +1376,9 @@ static void handle_print_stackptr (RCore *core, RDisasmState *ds) {
if (ds->show_stackptr) {
r_cons_printf ("%5d%s", ds->stackptr,
ds->analop.type==R_ANAL_OP_TYPE_CALL?">":
ds->stackptr>ds->ostackptr?"+":ds->stackptr<ds->ostackptr?"-":" ");
ds->analop.stackop == R_ANAL_STACK_ALIGN? "=":
ds->stackptr > ds->ostackptr? "+":
ds->stackptr < ds->ostackptr? "-": " ");
ds->ostackptr = ds->stackptr;
ds->stackptr += ds->analop.stackptr;
/* XXX if we reset the stackptr 'ret 0x4' has not effect.

1
libr/include/r_anal.h
View File

@ -528,6 +528,7 @@ enum {
R_ANAL_STACK_INC,
R_ANAL_STACK_GET,
R_ANAL_STACK_SET,
R_ANAL_STACK_ALIGN,
};
enum {