https://github.com/hstk30-hw created https://github.com/llvm/llvm-project/pull/167139
Since insns are always stored LE, on a BE system the opcodes will be loaded byte-reversed. Therefore, define two sets of opcodes, one for LE and one for BE. >From e139054b741d2b6b2e46fe33a9351a971707fe05 Mon Sep 17 00:00:00 2001 From: hstk30 <[email protected]> Date: Sat, 8 Nov 2025 21:21:09 +0800 Subject: [PATCH] [Unwind][AArch64] Match sigreturn instructions in big endian --- libunwind/src/UnwindCursor.hpp | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/libunwind/src/UnwindCursor.hpp b/libunwind/src/UnwindCursor.hpp index 7ec5f9e91578a..9414fd8a81525 100644 --- a/libunwind/src/UnwindCursor.hpp +++ b/libunwind/src/UnwindCursor.hpp @@ -58,6 +58,14 @@ #include "RWMutex.hpp" #include "Unwind-EHABI.h" +#if defined(__AARCH64EB__) +#define MOVZ_X8_8B 0x681180d2 +#define SVC_0 0x010000d4 +#else +#define MOVZ_X8_8B 0xd2801168 +#define SVC_0 0xd4000001 +#endif + #if defined(_LIBUNWIND_SUPPORT_SEH_UNWIND) // Provide a definition for the DISPATCHER_CONTEXT struct for old (Win7 and // earlier) SDKs. @@ -2827,7 +2835,7 @@ bool UnwindCursor<A, R>::setInfoForSigReturn(Registers_arm64 &) { return false; auto *instructions = reinterpret_cast<const uint32_t *>(pc); // Look for instructions: mov x8, #0x8b; svc #0x0 - if (instructions[0] != 0xd2801168 || instructions[1] != 0xd4000001) + if (instructions[0] != MOVZ_X8_8B || instructions[1] != SVC_0) return false; _info = {}; _______________________________________________ cfe-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
