Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 94ea09c6 authored by Daniel Kalmar's avatar Daniel Kalmar Committed by Robert Richter
Browse files

MIPS: Add new unwind_stack variant 



The unwind_stack_by_address variant supports unwinding based
on any kernel code address.
This symbol is also exported so it can be called from modules.

Signed-off-by: default avatarDaniel Kalmar <kalmard@homejinni.com>
Signed-off-by: default avatarGergely Kis <gergely@homejinni.com>
Signed-off-by: default avatarRobert Richter <robert.richter@amd.com>
parent 2c53b436

arch/mips/include/asm/stacktrace.h

+4 −0
Original line number Original line Diff line number Diff line
@@ -7,6 +7,10 @@ 
extern int raw_show_trace;

extern int raw_show_trace;

extern unsigned long unwind_stack(struct task_struct *task, unsigned long *sp,

extern unsigned long unwind_stack(struct task_struct *task, unsigned long *sp,

				  unsigned long pc, unsigned long *ra);

				  unsigned long pc, unsigned long *ra);

extern unsigned long unwind_stack_by_address(unsigned long stack_page,

					     unsigned long *sp,

					     unsigned long pc,

					     unsigned long *ra);

#else

#else

#define raw_show_trace 1

#define raw_show_trace 1

static inline unsigned long unwind_stack(struct task_struct *task,

static inline unsigned long unwind_stack(struct task_struct *task,

arch/mips/kernel/process.c

+14 −5
Original line number Original line Diff line number Diff line
@@ -373,18 +373,18 @@ unsigned long thread_saved_pc(struct task_struct *tsk) 








#ifdef CONFIG_KALLSYMS

#ifdef CONFIG_KALLSYMS

/* used by show_backtrace() */

/* generic stack unwinding function */

unsigned long unwind_stack(struct task_struct *task, unsigned long *sp,

unsigned long notrace unwind_stack_by_address(unsigned long stack_page,

			   unsigned long pc, unsigned long *ra)

					      unsigned long *sp,

					      unsigned long pc,

					      unsigned long *ra)

{

{

	unsigned long stack_page;

	struct mips_frame_info info;

	struct mips_frame_info info;

	unsigned long size, ofs;

	unsigned long size, ofs;

	int leaf;

	int leaf;

	extern void ret_from_irq(void);

	extern void ret_from_irq(void);

	extern void ret_from_exception(void);

	extern void ret_from_exception(void);





	stack_page = (unsigned long)task_stack_page(task);

	if (!stack_page)

	if (!stack_page)

		return 0;

		return 0;
@@ -443,6 +443,15 @@ unsigned long unwind_stack(struct task_struct *task, unsigned long *sp, 
	*ra = 0;

	*ra = 0;

	return __kernel_text_address(pc) ? pc : 0;

	return __kernel_text_address(pc) ? pc : 0;

}

}

EXPORT_SYMBOL(unwind_stack_by_address);



/* used by show_backtrace() */

unsigned long unwind_stack(struct task_struct *task, unsigned long *sp,

			   unsigned long pc, unsigned long *ra)

{

	unsigned long stack_page = (unsigned long)task_stack_page(task);

	return unwind_stack_by_address(stack_page, sp, pc, ra);

}

#endif

#endif





/*

/*