bcraig added a subscriber: bcraig. ================ Comment at: src/UnwindRegistersRestore.S:325 @@ -324,4 +324,3 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm20restoreCoreAndJumpToEv) -#if !defined(__ARM_ARCH_ISA_ARM) - ldr r2, [r0, #52] - ldr r3, [r0, #60] +#if !defined(__ARM_ARCH_ISA_ARM) && __ARM_ARCH_ISA_THUMB == 1 + @ r8-r12: ldr into r1-r5, then mov to r8-r12 ---------------- weimingz wrote: > originally, r8-r12 were not restored. Was that some existing bug? I'm not sure why r12 is getting messed with here. It is intended as a GOT/PLT scratch register. r8+ isn't ubiquitously available in Thumb state according to the ATPCS. The AAPCS says that r4-r8, r10, r11, and SP must be preserved. r9 can optionally be preserved.
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