92652cf986
To follow the existing per-arch conventions replace open-coded uses of asm "sp" as "current_stack_pointer". This will let it be used in non-arch places (like HARDENED_USERCOPY). Cc: Chris Zankel <chris@zankel.net> Cc: Marc Zyngier <maz@kernel.org> Cc: linux-xtensa@linux-xtensa.org Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Link: https://lore.kernel.org/lkml/CAMo8BfJFJE-n3=AF+pb9_6oF3gzxX7a+7aBrASHjjNX5byqDqw@mail.gmail.com
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/*
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* arch/xtensa/include/asm/stacktrace.h
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2001 - 2013 Tensilica Inc.
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*/
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#ifndef _XTENSA_STACKTRACE_H
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#define _XTENSA_STACKTRACE_H
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#include <linux/sched.h>
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struct stackframe {
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unsigned long pc;
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unsigned long sp;
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};
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static __always_inline unsigned long *stack_pointer(struct task_struct *task)
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{
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unsigned long sp;
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if (!task || task == current)
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sp = current_stack_pointer;
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else
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sp = task->thread.sp;
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return (unsigned long *)sp;
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}
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void walk_stackframe(unsigned long *sp,
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int (*fn)(struct stackframe *frame, void *data),
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void *data);
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void xtensa_backtrace_kernel(struct pt_regs *regs, unsigned int depth,
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int (*kfn)(struct stackframe *frame, void *data),
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int (*ufn)(struct stackframe *frame, void *data),
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void *data);
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void xtensa_backtrace_user(struct pt_regs *regs, unsigned int depth,
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int (*ufn)(struct stackframe *frame, void *data),
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void *data);
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#endif /* _XTENSA_STACKTRACE_H */
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