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Commit a4ceab1a authored by Behan Webster's avatar Behan Webster Committed by Will Deacon
Browse files

arm64: LLVMLinux: Use global stack pointer in return_address() 



The global register current_stack_pointer holds the current stack pointer.
This change supports being able to compile the kernel with both gcc and clang.

Author: Mark Charlebois <charlebm@gmail.com>
Signed-off-by: default avatarMark Charlebois <charlebm@gmail.com>
Signed-off-by: default avatarBehan Webster <behanw@converseincode.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 34ccf8f4

arch/arm64/kernel/return_address.c

+1 −2
Original line number Diff line number Diff line
@@ -36,13 +36,12 @@ void *return_address(unsigned int level) 
{

	struct return_address_data data;

	struct stackframe frame;

	register unsigned long current_sp asm ("sp");



	data.level = level + 2;

	data.addr = NULL;



	frame.fp = (unsigned long)__builtin_frame_address(0);

	frame.sp = current_sp;

	frame.sp = current_stack_pointer;

	frame.pc = (unsigned long)return_address; /* dummy */



	walk_stackframe(&frame, save_return_addr, &data);