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33 * @(#)profile.h 8.1 (Berkeley) 6/11/93
34 * $FreeBSD: src/sys/amd64/include/profile.h,v 1.33 2004/01/06 20:36:21 nectar Exp $
35 * $DragonFly: src/sys/amd64/include/Attic/profile.h,v 1.1 2004/02/02 08:05:52 dillon Exp $
38 #ifndef _MACHINE_PROFILE_H_
39 #define _MACHINE_PROFILE_H_
44 * Config generates something to tell the compiler to align functions on 16
45 * byte boundaries. A strict alignment is good for keeping the tables small.
47 #define FUNCTION_ALIGNMENT 16
50 * The kernel uses assembler stubs instead of unportable inlines.
51 * This is mainly to save a little time when profiling is not enabled,
52 * which is the usual case for the kernel.
54 #define _MCOUNT_DECL void mcount
58 #define CALIB_SCALE 1000
59 #define KCOUNT(p,index) ((p)->kcount[(index) \
60 / (HISTFRACTION * sizeof(HISTCOUNTER))])
61 #define MCOUNT_DECL(s)
62 #define MCOUNT_ENTER(s)
63 #define MCOUNT_EXIT(s)
64 #define PC_TO_I(p, pc) ((uintfptr_t)(pc) - (uintfptr_t)(p)->lowpc)
66 #define MCOUNT_DECL(s) u_long s;
68 extern int mcount_lock;
69 #define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); \
70 while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \
72 #define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \
75 #define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); }
76 #define MCOUNT_EXIT(s) (write_rflags(s))
82 #define FUNCTION_ALIGNMENT 4
84 #define _MCOUNT_DECL static __inline void _mcount
91 uintfptr_t selfpc, frompc; \
93 * Find the return address for mcount, \
94 * and the return address for mcount's caller. \
96 * selfpc = pc pushed by call to mcount \
98 __asm("movq 8(%%rbp),%0" : "=r" (selfpc)); \
100 * frompc = pc pushed by call to mcount's caller. \
101 * The caller's stack frame has already been built, so %ebp is \
102 * the caller's frame pointer. The caller's raddr is in the \
103 * caller's frame following the caller's caller's frame pointer.\
105 __asm("movq (%%rbp),%0" : "=r" (frompc)); \
106 frompc = ((uintfptr_t *)frompc)[1]; \
107 _mcount(frompc, selfpc); \
115 #endif /* __GNUC__ */
117 typedef unsigned long uintfptr_t;
122 * An unsigned integral type that can hold non-negative difference between
125 typedef u_int fptrdiff_t;
129 void mcount(uintfptr_t frompc, uintfptr_t selfpc);
130 void kmupetext(uintfptr_t nhighpc);
135 void nullfunc_loop_profiled(void);
136 void nullfunc_profiled(void);
137 void startguprof(struct gmonparam *p);
138 void stopguprof(struct gmonparam *p);
140 #define startguprof(p)
141 #define stopguprof(p)
146 #include <sys/cdefs.h>
150 void mcount(void) __asm(".mcount");
157 /* XXX doesn't quite work outside kernel yet. */
158 extern int cputime_bias;
162 void empty_loop(void);
163 void mexitcount(uintfptr_t selfpc);
165 void nullfunc_loop(void);
169 #endif /* !_MACHINE_PROFILE_H_ */