parisc: add CALLER_ADDR{0-6} macros
Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
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@ -20,6 +20,20 @@ struct ftrace_ret_stack {
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* Defined in entry.S
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*/
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extern void return_to_handler(void);
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extern unsigned long return_address(unsigned int);
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#define HAVE_ARCH_CALLER_ADDR
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#define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
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#define CALLER_ADDR1 return_address(1)
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#define CALLER_ADDR2 return_address(2)
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#define CALLER_ADDR3 return_address(3)
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#define CALLER_ADDR4 return_address(4)
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#define CALLER_ADDR5 return_address(5)
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#define CALLER_ADDR6 return_address(6)
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_PARISC_FTRACE_H */
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@ -417,3 +417,30 @@ int unwind_to_user(struct unwind_frame_info *info)
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return ret;
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}
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unsigned long return_address(unsigned int level)
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{
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struct unwind_frame_info info;
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struct pt_regs r;
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unsigned long sp;
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/* initialize unwind info */
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asm volatile ("copy %%r30, %0" : "=r"(sp));
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memset(&r, 0, sizeof(struct pt_regs));
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r.iaoq[0] = (unsigned long) current_text_addr();
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r.gr[2] = (unsigned long) __builtin_return_address(0);
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r.gr[30] = sp;
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unwind_frame_init(&info, current, &r);
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/* unwind stack */
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++level;
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do {
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if (unwind_once(&info) < 0 || info.ip == 0)
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return 0;
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if (!__kernel_text_address(info.ip)) {
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return 0;
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}
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} while (info.ip && level--);
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return info.ip;
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}
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