diff options
| author | tegge <tegge@FreeBSD.org> | 1997-12-15 02:18:35 +0000 |
|---|---|---|
| committer | tegge <tegge@FreeBSD.org> | 1997-12-15 02:18:35 +0000 |
| commit | ba494eff3a511b2f5c5d9bbc02686772b9ed4de7 (patch) | |
| tree | 6d2e4d72fd7140f16dc511d497a2d2acfcae6f26 /sys/amd64/include/profile.h | |
| parent | da6ab2349a36aff5f17c3d322976dace8fa64ac7 (diff) | |
| download | FreeBSD-src-ba494eff3a511b2f5c5d9bbc02686772b9ed4de7.zip FreeBSD-src-ba494eff3a511b2f5c5d9bbc02686772b9ed4de7.tar.gz | |
Add support for low resolution SMP kernel profiling.
- A nonprofiling version of s_lock (called s_lock_np) is used
by mcount.
- When profiling is active, more registers are clobbered in
seemingly simple assembly routines. This means that some
callers needed to save/restore extra registers.
- The stack pointer must have space for a 'fake' return address
in idle, to avoid stack underflow.
Diffstat (limited to 'sys/amd64/include/profile.h')
| -rw-r--r-- | sys/amd64/include/profile.h | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/sys/amd64/include/profile.h b/sys/amd64/include/profile.h index d451245..0e6601e 100644 --- a/sys/amd64/include/profile.h +++ b/sys/amd64/include/profile.h @@ -31,7 +31,7 @@ * SUCH DAMAGE. * * @(#)profile.h 8.1 (Berkeley) 6/11/93 - * $Id: profile.h,v 1.11 1997/02/22 09:35:01 peter Exp $ + * $Id: profile.h,v 1.12 1997/08/30 08:07:50 fsmp Exp $ */ #ifndef _MACHINE_PROFILE_H_ @@ -62,10 +62,13 @@ #define PC_TO_I(p, pc) ((fptrint_t)(pc) - (fptrint_t)(p)->lowpc) #else #define MCOUNT_DECL(s) u_long s; -#define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); } #ifdef SMP -#define MCOUNT_EXIT(s) { MPINTR_UNLOCK(); write_eflags(s); } +#define MCOUNT_ENTER(s) { s = read_eflags(); \ + __asm __volatile("cli" : : : "memory"); \ + s_lock_np(&mcount_lock); } +#define MCOUNT_EXIT(s) { s_unlock_np(&mcount_lock); write_eflags(s); } #else +#define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); } #define MCOUNT_EXIT(s) (write_eflags(s)) #endif #endif /* GUPROF */ @@ -107,7 +110,7 @@ typedef u_int fptrint_t; * An unsigned integral type that can hold non-negative difference between * function pointers. */ -typedef int fptrdiff_t; +typedef u_int fptrdiff_t; #ifdef KERNEL |
