9eff26ea48
This implements a powerpc version of perf_arch_fetch_caller_regs to get correct call-graphs. It's implemented in assembly because that way we can be sure there isn't a stack frame for perf_arch_fetch_caller_regs. If it was in C, gcc might or might not create a stack frame for it, which would affect the number of levels we have to skip. With this, we see results from perf record -e lock:lock_acquire like this: # Samples: 24878 # # Overhead Command Shared Object Symbol # ........ .............. ................. ...... # 14.99% perf [kernel.kallsyms] [k] ._raw_spin_lock | --- ._raw_spin_lock | |--25.00%-- .alloc_fd | (nil) | | | |--50.00%-- .anon_inode_getfd | | .sys_perf_event_open | | syscall_exit | | syscall | | create_counter | | __cmd_record | | run_builtin | | main | | 0xfd2e704 | | 0xfd2e8c0 | | (nil) ... etc. Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: anton@samba.org Cc: linuxppc-dev@ozlabs.org Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20100318050513.GA6575@drongo> Signed-off-by: Ingo Molnar <mingo@elte.hu>
73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
#ifndef _ASM_POWERPC_ASM_COMPAT_H
|
|
#define _ASM_POWERPC_ASM_COMPAT_H
|
|
|
|
#include <asm/types.h>
|
|
#include <asm/ppc-opcode.h>
|
|
|
|
#ifdef __ASSEMBLY__
|
|
# define stringify_in_c(...) __VA_ARGS__
|
|
# define ASM_CONST(x) x
|
|
#else
|
|
/* This version of stringify will deal with commas... */
|
|
# define __stringify_in_c(...) #__VA_ARGS__
|
|
# define stringify_in_c(...) __stringify_in_c(__VA_ARGS__) " "
|
|
# define __ASM_CONST(x) x##UL
|
|
# define ASM_CONST(x) __ASM_CONST(x)
|
|
#endif
|
|
|
|
|
|
#ifdef __powerpc64__
|
|
|
|
/* operations for longs and pointers */
|
|
#define PPC_LL stringify_in_c(ld)
|
|
#define PPC_STL stringify_in_c(std)
|
|
#define PPC_LCMPI stringify_in_c(cmpdi)
|
|
#define PPC_LONG stringify_in_c(.llong)
|
|
#define PPC_LONG_ALIGN stringify_in_c(.balign 8)
|
|
#define PPC_TLNEI stringify_in_c(tdnei)
|
|
#define PPC_LLARX(t, a, b, eh) PPC_LDARX(t, a, b, eh)
|
|
#define PPC_STLCX stringify_in_c(stdcx.)
|
|
#define PPC_CNTLZL stringify_in_c(cntlzd)
|
|
#define PPC_LR_STKOFF 16
|
|
|
|
/* Move to CR, single-entry optimized version. Only available
|
|
* on POWER4 and later.
|
|
*/
|
|
#ifdef CONFIG_POWER4_ONLY
|
|
#define PPC_MTOCRF stringify_in_c(mtocrf)
|
|
#else
|
|
#define PPC_MTOCRF stringify_in_c(mtcrf)
|
|
#endif
|
|
|
|
#else /* 32-bit */
|
|
|
|
/* operations for longs and pointers */
|
|
#define PPC_LL stringify_in_c(lwz)
|
|
#define PPC_STL stringify_in_c(stw)
|
|
#define PPC_LCMPI stringify_in_c(cmpwi)
|
|
#define PPC_LONG stringify_in_c(.long)
|
|
#define PPC_LONG_ALIGN stringify_in_c(.balign 4)
|
|
#define PPC_TLNEI stringify_in_c(twnei)
|
|
#define PPC_LLARX(t, a, b, eh) PPC_LWARX(t, a, b, eh)
|
|
#define PPC_STLCX stringify_in_c(stwcx.)
|
|
#define PPC_CNTLZL stringify_in_c(cntlzw)
|
|
#define PPC_MTOCRF stringify_in_c(mtcrf)
|
|
#define PPC_LR_STKOFF 4
|
|
|
|
#endif
|
|
|
|
#ifdef __KERNEL__
|
|
#ifdef CONFIG_IBM405_ERR77
|
|
/* Erratum #77 on the 405 means we need a sync or dcbt before every
|
|
* stwcx. The old ATOMIC_SYNC_FIX covered some but not all of this.
|
|
*/
|
|
#define PPC405_ERR77(ra,rb) stringify_in_c(dcbt ra, rb;)
|
|
#define PPC405_ERR77_SYNC stringify_in_c(sync;)
|
|
#else
|
|
#define PPC405_ERR77(ra,rb)
|
|
#define PPC405_ERR77_SYNC
|
|
#endif
|
|
#endif
|
|
|
|
#endif /* _ASM_POWERPC_ASM_COMPAT_H */
|