================
@@ -1040,13 +1040,23 @@ AArch64BtiPac::AArch64BtiPac(Ctx &ctx) : AArch64(ctx) {
void AArch64BtiPac::writePltHeader(uint8_t *buf) const {
const uint8_t btiData[] = { 0x5f, 0x24, 0x03, 0xd5 }; // bti c
+ const uint8_t signLR[] = {0x7f, 0x23, 0x03, 0xd5}; // pacibsp
const uint8_t pltData[] = {
0xf0, 0x7b, 0xbf, 0xa9, // stp x16, x30, [sp,#-16]!
0x10, 0x00, 0x00, 0x90, // adrp x16, Page(&(.got.plt[2]))
0x11, 0x02, 0x40, 0xf9, // ldr x17, [x16, Offset(&(.got.plt[2]))]
0x10, 0x02, 0x00, 0x91, // add x16, x16, Offset(&(.got.plt[2]))
- 0x20, 0x02, 0x1f, 0xd6, // br x17
- 0x1f, 0x20, 0x03, 0xd5, // nop
+ };
+ const uint8_t pacHintBr[] = {
+ 0x9f, 0x21, 0x03, 0xd5, // autia1716
+ 0x20, 0x02, 0x1f, 0xd6 // br x17
+ };
+ const uint8_t pacBr[] = {
+ 0x30, 0x0a, 0x1f, 0xd7, // braa x17, x16
+ 0x1f, 0x20, 0x03, 0xd5 // nop
----------------
asl wrote:
why do we need extra nop here? And below?
https://github.com/llvm/llvm-project/pull/116334
_______________________________________________
llvm-branch-commits mailing list
llvm-branch-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
