sparc64: Fix perf_arch_get_caller_regs().
After b0f82b81fe6bbcf78d478071f33e44554726bc81 ("perf: Drop the skip
argument from perf_arch_fetch_regs_caller") the build broke on sparc64
due to the lack of a module symbol export of __perf_arch_fetch_caller_regs.
But that assembler helper can actually be complete eliminated now that
the semantics of this interface have been greatly simplified.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/include/asm/perf_event.h b/arch/sparc/include/asm/perf_event.h
index 74c4e0c..727af70 100644
--- a/arch/sparc/include/asm/perf_event.h
+++ b/arch/sparc/include/asm/perf_event.h
@@ -10,11 +10,26 @@
extern void init_hw_perf_events(void);
-extern void
-__perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip);
-
-#define perf_arch_fetch_caller_regs(pt_regs, ip) \
- __perf_arch_fetch_caller_regs(pt_regs, ip, 1);
+#define perf_arch_fetch_caller_regs(regs, ip) \
+do { \
+ unsigned long _pstate, _asi, _pil, _i7, _fp; \
+ __asm__ __volatile__("rdpr %%pstate, %0\n\t" \
+ "rd %%asi, %1\n\t" \
+ "rdpr %%pil, %2\n\t" \
+ "mov %%i7, %3\n\t" \
+ "mov %%i6, %4\n\t" \
+ : "=r" (_pstate), \
+ "=r" (_asi), \
+ "=r" (_pil), \
+ "=r" (_i7), \
+ "=r" (_fp)); \
+ (regs)->tstate = (_pstate << 8) | \
+ (_asi << 24) | (_pil << 20); \
+ (regs)->tpc = (ip); \
+ (regs)->tnpc = (regs)->tpc + 4; \
+ (regs)->u_regs[UREG_I6] = _fp; \
+ (regs)->u_regs[UREG_I7] = _i7; \
+} while (0)
#else
static inline void init_hw_perf_events(void) { }
#endif