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Fixed byte offset for near jmps reversing in hack.c (#10011)

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This commit is contained in:
fcasal 2018-05-04 18:59:43 +01:00 committed by radare
parent f69d69739d
commit e624477f15
1 changed files with 5 additions and 7 deletions
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12
libr/core/hack.c
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@ -210,15 +210,13 @@ R_API bool r_core_hack_x86(RCore *core, const char *op, const RAnalOp *analop) {
return false;
}
} else if (!strcmp (op, "recj")) {
int of = *b == 0xf;
if (b[of] < 0x80 && b[of] >= 0x70) { // jo, jno, jb, jae, je, jne, jbe, ja, js, jns
if (of) {
r_core_cmdf (core, "wx 0f%x\n", (b[1]%2)? b[1] - 1: b[1] + 1);
} else {
int is_near = (*b == 0xf);
if (b[0] < 0x80 && b[0] >= 0x70) { // short jmps: jo, jno, jb, jae, je, jne, jbe, ja, js, jns
r_core_cmdf (core, "wx %x\n", (b[0]%2)? b[0] - 1: b[0] + 1);
}
} else if (is_near && b[1] < 0x90 && b[1] >= 0x80) { // near jmps: jo, jno, jb, jae, je, jne, jbe, ja, js, jns
r_core_cmdf (core, "wx 0f%x\n", (b[1]%2)? b[1] - 1: b[1] + 1);
} else {
eprintf ("Invalid opcode\n");
eprintf ("Invalid conditional jump opcode\n");
return false;
}
} else if (!strcmp (op, "ret1")) {