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| author | Behan Webster <behanw@converseincode.com> | 2014-09-27 01:31:10 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-11-14 00:58:09 +0100 |
| commit | 0bf4954f248c59705470bae2210f67a4b03f8f3c (patch) | |
| tree | c401585f6c29e73b63254041ad89cb9fded38ca0 | |
| parent | ARM: 8175/1: Use current_stack_pointer to calculate pt_regs address (diff) | |
| download | linux-0bf4954f248c59705470bae2210f67a4b03f8f3c.tar.xz linux-0bf4954f248c59705470bae2210f67a4b03f8f3c.zip | |
ARM: 8176/1: Use current_stack_pointer in unwind_backtrace
Use the global current_stack_pointer to get the value of the stack pointer.
This change supports being able to compile the kernel with both gcc and clang.
Signed-off-by: Behan Webster <behanw@converseincode.com>
Reviewed-by: Mark Charlebois <charlebm@gmail.com>
Reviewed-by: Jan-Simon Möller <dl9pf@gmx.de>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/kernel/unwind.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c index cbb85c5fabf9..0bee233fef9a 100644 --- a/arch/arm/kernel/unwind.c +++ b/arch/arm/kernel/unwind.c @@ -471,7 +471,6 @@ int unwind_frame(struct stackframe *frame) void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk) { struct stackframe frame; - register unsigned long current_sp asm ("sp"); pr_debug("%s(regs = %p tsk = %p)\n", __func__, regs, tsk); @@ -485,7 +484,7 @@ void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk) frame.pc = regs->ARM_lr; } else if (tsk == current) { frame.fp = (unsigned long)__builtin_frame_address(0); - frame.sp = current_sp; + frame.sp = current_stack_pointer; frame.lr = (unsigned long)__builtin_return_address(0); frame.pc = (unsigned long)unwind_backtrace; } else { |