ArmPlatformPkg: clear frame pointer in startup code

[mirror_edk2.git] / ArmPlatformPkg / PrePi / AArch64 / ModuleEntryPoint.S

diff --git a/ArmPlatformPkg/PrePi/AArch64/ModuleEntryPoint.S b/ArmPlatformPkg/PrePi/AArch64/ModuleEntryPoint.S
index a81709d5d12d590ec5cb6e908ea7e0f3a4c52366..2069161b957dd2b52ccc749cc1c63e9c8045c675 100644 (file)
--- a/ArmPlatformPkg/PrePi/AArch64/ModuleEntryPoint.S
+++ b/ArmPlatformPkg/PrePi/AArch64/ModuleEntryPoint.S
@@ -109,6 +109,9 @@ _PrepareArguments:
   // Ensure we're jumping to FV version of the code (not boot remapped alias)\r
   ldr   x4, =ASM_PFX(CEntryPoint)\r
 \r
+  // Set the frame pointer to NULL so any backtraces terminate here\r
+  mov   x29, xzr\r
+\r
   // Jump to PrePiCore C code\r
   //    x0 = MpId\r
   //    x1 = UefiMemoryBase\r