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Commit 11e17809 authored by Helge Deller's avatar Helge Deller Committed by Kyle McMartin
Browse files

parisc: add CALLER_ADDR{0-6} macros 



Signed-off-by: default avatarHelge Deller <deller@gmx.de>
Signed-off-by: default avatarKyle McMartin <kyle@mcmartin.ca>
parent b29f9037

arch/parisc/include/asm/ftrace.h

+14 −0
Original line number Diff line number Diff line
@@ -20,6 +20,20 @@ struct ftrace_ret_stack { 
 * Defined in entry.S

 */

extern void return_to_handler(void);





extern unsigned long return_address(unsigned int);



#define HAVE_ARCH_CALLER_ADDR



#define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))

#define CALLER_ADDR1 return_address(1)

#define CALLER_ADDR2 return_address(2)

#define CALLER_ADDR3 return_address(3)

#define CALLER_ADDR4 return_address(4)

#define CALLER_ADDR5 return_address(5)

#define CALLER_ADDR6 return_address(6)



#endif /* __ASSEMBLY__ */



#endif /* _ASM_PARISC_FTRACE_H */

arch/parisc/kernel/unwind.c

+27 −0
Original line number Diff line number Diff line
@@ -417,3 +417,30 @@ int unwind_to_user(struct unwind_frame_info *info) 


	return ret;

}



unsigned long return_address(unsigned int level)

{

	struct unwind_frame_info info;

	struct pt_regs r;

	unsigned long sp;



	/* initialize unwind info */

	asm volatile ("copy %%r30, %0" : "=r"(sp));

	memset(&r, 0, sizeof(struct pt_regs));

	r.iaoq[0] = (unsigned long) current_text_addr();

	r.gr[2] = (unsigned long) __builtin_return_address(0);

	r.gr[30] = sp;

	unwind_frame_init(&info, current, &r);



	/* unwind stack */

	++level;

	do {

		if (unwind_once(&info) < 0 || info.ip == 0)

			return 0;

		if (!__kernel_text_address(info.ip)) {

			return 0;

		}

	} while (info.ip && level--);



	return info.ip;

}