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Check bb APIs nullability for #23490

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astralia 2024-11-02 20:57:24 +01:00 committed by pancake
parent e25d1beb23
commit 2718f95d8c
1 changed files with 15 additions and 8 deletions
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23
libr/anal/bb.c
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@ -10,27 +10,28 @@ typedef struct {
RAnalBlock *ret;
} BBFromOffsetJmpmidCtx;
static bool bb_from_offset_jmpmid_cb(RAnalBlock *block, void *user) {
static bool bb_from_offset_jmpmid_cb(RAnalBlock *bb, void *user) {
BBFromOffsetJmpmidCtx *ctx = user;
// If an instruction starts exactly at the search addr, return that block immediately
if (r_anal_block_op_starts_at (block, ctx->addr)) {
ctx->ret = block;
// If an instruction starts exactly at the search addr, return that basicblock immediately
if (r_anal_block_op_starts_at (bb, ctx->addr)) {
ctx->ret = bb;
return false;
}
// else search the closest one
if (!ctx->ret || ctx->ret->addr < block->addr) {
ctx->ret = block;
if (!ctx->ret || ctx->ret->addr < bb->addr) {
ctx->ret = bb;
}
return true;
}
static bool bb_from_offset_first_cb(RAnalBlock *block, void *user) {
static bool bb_from_offset_first_cb(RAnalBlock *bb, void *user) {
RAnalBlock **ret = user;
*ret = block;
*ret = bb;
return false;
}
R_API RAnalBlock *r_anal_bb_from_offset(RAnal *anal, ut64 off) {
R_RETURN_VAL_IF_FAIL (anal, NULL);
if (anal->opt.jmpmid && r_anal_is_aligned (anal, off)) {
BBFromOffsetJmpmidCtx ctx = { off, NULL };
r_anal_blocks_foreach_in (anal, off, bb_from_offset_jmpmid_cb, &ctx);
@ -45,6 +46,7 @@ R_API RAnalBlock *r_anal_bb_from_offset(RAnal *anal, ut64 off) {
/* returns the offset of the i-th instruction in the basicblock bb.
* If the index of the instruction is not valid, it returns UT16_MAX */
R_API ut16 r_anal_bb_offset_inst(const RAnalBlock *bb, int i) {
R_RETURN_VAL_IF_FAIL (bb, UT16_MAX);
if (i < 0 || i >= bb->ninstr) {
return UT16_MAX;
}
@ -54,6 +56,7 @@ R_API ut16 r_anal_bb_offset_inst(const RAnalBlock *bb, int i) {
/* returns the address of the i-th instruction in the basicblock bb.
* If the index of the instruction is not valid, it returns UT64_MAX */
R_API ut64 r_anal_bb_opaddr_i(RAnalBlock *bb, int i) {
R_RETURN_VAL_IF_FAIL (bb, UT64_MAX);
ut16 offset = r_anal_bb_offset_inst (bb, i);
if (offset == UT16_MAX) {
return UT64_MAX;
@ -63,6 +66,7 @@ R_API ut64 r_anal_bb_opaddr_i(RAnalBlock *bb, int i) {
/* set the offset of the i-th instruction in the basicblock bb */
R_API bool r_anal_bb_set_offset(RAnalBlock *bb, int i, ut16 v) {
R_RETURN_VAL_IF_FAIL (bb, false);
// the offset 0 of the instruction 0 is not stored because always 0
if (i > 0 && v > 0) {
if (i >= bb->op_pos_size) {
@ -94,6 +98,7 @@ R_API bool r_anal_bb_set_offset(RAnalBlock *bb, int i, ut16 v) {
/* returns the address of the instruction that occupies a given offset.
* If the offset is not part of the given basicblock, UT64_MAX is returned. */
R_API ut64 r_anal_bb_opaddr_at(RAnalBlock *bb, ut64 off) {
R_RETURN_VAL_IF_FAIL (bb, UT64_MAX);
ut16 delta, delta_off, last_delta;
int i;
@ -114,6 +119,7 @@ R_API ut64 r_anal_bb_opaddr_at(RAnalBlock *bb, ut64 off) {
// returns the size of the i-th instruction in a basicblock
R_API ut64 r_anal_bb_size_i(RAnalBlock *bb, int i) {
R_RETURN_VAL_IF_FAIL (bb, UT64_MAX);
if (i < 0 || i >= bb->ninstr) {
return UT64_MAX;
}
@ -125,6 +131,7 @@ R_API ut64 r_anal_bb_size_i(RAnalBlock *bb, int i) {
/* returns the address of the basicblock that contains addr or UT64_MAX if
* there is no such basic block */
R_API ut64 r_anal_get_bbaddr(RAnal *anal, ut64 addr) {
R_RETURN_VAL_IF_FAIL (anal, UT64_MAX);
RAnalBlock *bb = r_anal_bb_from_offset (anal, addr);
return bb? bb->addr: UT64_MAX;
}