From: rric@kernel.org (Robert Richter)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 2/7] ARM: Introduce arm_get_current_stack_frame()
Date: Mon, 2 Jun 2014 10:05:34 +0200 [thread overview]
Message-ID: <20140602080534.GY27560@rric.localhost> (raw)
In-Reply-To: <1401469191-29232-3-git-send-email-nikolay.borisov@arm.com>
On 30.05.14 17:59:46, Nikolay Borisov wrote:
> diff --git a/arch/arm/include/asm/ptrace.h b/arch/arm/include/asm/ptrace.h
> index c877654..601264d 100644
> --- a/arch/arm/include/asm/ptrace.h
> +++ b/arch/arm/include/asm/ptrace.h
> @@ -84,6 +84,12 @@ static inline long regs_return_value(struct pt_regs *regs)
>
> #define instruction_pointer(regs) (regs)->ARM_pc
>
> +#ifdef CONFIG_THUMB2_KERNEL
> +#define frame_pointer(regs) (regs)->ARM_r7
> +#else
> +#define frame_pointer(regs) (regs)->ARM_fp
> +#endif
> +
> static inline void instruction_pointer_set(struct pt_regs *regs,
> unsigned long val)
> {
> diff --git a/arch/arm/include/asm/stacktrace.h b/arch/arm/include/asm/stacktrace.h
> index 4d0a164..6a5b13e 100644
> --- a/arch/arm/include/asm/stacktrace.h
> +++ b/arch/arm/include/asm/stacktrace.h
> @@ -2,12 +2,24 @@
> #define __ASM_STACKTRACE_H
>
> struct stackframe {
> + /* FP member should hold R7 when CONFIG_THUMB2_KERNEL is enabled.
> + * and R11 otherwise
> + */
> unsigned long fp;
> unsigned long sp;
> unsigned long lr;
> unsigned long pc;
> };
>
> +static __always_inline
> +void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame)
> +{
> + frame->fp = frame_pointer(regs);
stacktrace.h should now include asm/ptrace.h.
Otherwise
Acked-by: Robert Richter <rric@kernel.org>
for patch 2 and 7 of this series.
-Robert
> + frame->sp = regs->ARM_sp;
> + frame->lr = regs->ARM_lr;
> + frame->pc = regs->ARM_pc;
> +}
next prev parent reply other threads:[~2014-06-02 8:05 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-30 16:59 [PATCH v2 0/7] Fix backtrace support in THUMB2 mode Nikolay Borisov
2014-05-30 16:59 ` [PATCH v2 1/7] ARM: Make thread_save_fp macro aware of " Nikolay Borisov
2014-05-30 16:59 ` [PATCH v2 2/7] ARM: Introduce arm_get_current_stack_frame() Nikolay Borisov
2014-05-30 17:20 ` Will Deacon
2014-06-02 8:05 ` Robert Richter [this message]
2014-05-30 16:59 ` [PATCH v3 3/7] ARM: perf: Make perf use arm_get_current_stackframe Nikolay Borisov
2014-05-30 16:59 ` [PATCH v2 4/7] ARM: time: Make use of arm_get_current_stackframe Nikolay Borisov
2014-05-30 16:59 ` [PATCH v2 5/7] ARM: unwind: Use arm_get_current_stackframe Nikolay Borisov
2014-05-30 16:59 ` [PATCH v2 6/7] ARM: traps: Make use of the frame_pointer macro Nikolay Borisov
2014-05-30 16:59 ` [PATCH v2 7/7] ARM: oprofile: Use of arm_get_current_stackframe Nikolay Borisov
2014-05-30 17:19 ` [PATCH v2 0/7] Fix backtrace support in THUMB2 mode Will Deacon
2014-05-31 18:31 ` Arnd Bergmann
2014-06-02 8:34 ` Nikolay Borisov
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