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33 * @(#)profile.h 8.1 (Berkeley) 6/11/93
34 * $FreeBSD: src/sys/i386/include/profile.h,v 1.20 1999/12/29 04:33:05 peter Exp $
35 * $DragonFly: src/sys/i386/include/Attic/profile.h,v 1.8 2006/05/21 03:43:44 dillon Exp $
38 #ifndef _MACHINE_PROFILE_H_
39 #define _MACHINE_PROFILE_H_
42 #include <sys/cdefs.h>
45 #include <sys/types.h>
51 * Config generates something to tell the compiler to align functions on 16
52 * byte boundaries. A strict alignment is good for keeping the tables small.
54 #define FUNCTION_ALIGNMENT 16
57 * The kernel uses assembler stubs instead of unportable inlines.
58 * This is mainly to save a little time when profiling is not enabled,
59 * which is the usual case for the kernel.
61 #define _MCOUNT_DECL void mcount
65 #define CALIB_SCALE 1000
66 #define KCOUNT(p,index) ((p)->kcount[(index) \
67 / (HISTFRACTION * sizeof(HISTCOUNTER))])
68 #define MCOUNT_DECL(s)
69 #define MCOUNT_ENTER(s)
70 #define MCOUNT_EXIT(s)
71 #define PC_TO_I(p, pc) ((uintfptr_t)(pc) - (uintfptr_t)(p)->lowpc)
73 #define MCOUNT_DECL(s) u_long s;
75 #define MCOUNT_ENTER(s) { s = read_eflags(); \
76 __asm __volatile("cli" : : : "memory"); \
77 s_lock_np(&mcount_lock); }
78 #define MCOUNT_EXIT(s) { s_unlock_np(&mcount_lock); write_eflags(s); }
80 #define MCOUNT_ENTER(s) { s = read_eflags(); cpu_disable_intr(); }
81 #define MCOUNT_EXIT(s) (write_eflags(s))
87 #define FUNCTION_ALIGNMENT 4
89 #define _MCOUNT_DECL static __inline void _mcount
95 uintfptr_t selfpc, frompc; \
97 * Find the return address for mcount, \
98 * and the return address for mcount's caller. \
100 * selfpc = pc pushed by call to mcount \
102 asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \
104 * frompc = pc pushed by call to mcount's caller. \
105 * The caller's stack frame has already been built, so %ebp is \
106 * the caller's frame pointer. The caller's raddr is in the \
107 * caller's frame following the caller's caller's frame pointer. \
109 asm("movl (%%ebp),%0" : "=r" (frompc)); \
110 frompc = ((uintfptr_t *)frompc)[1]; \
111 _mcount(frompc, selfpc); \
114 typedef unsigned int uintfptr_t;
119 * An unsigned integral type that can hold non-negative difference between
122 typedef u_int fptrdiff_t;
126 void mcount (uintfptr_t frompc, uintfptr_t selfpc);
131 void nullfunc_loop_profiled (void);
132 void nullfunc_profiled (void);
133 void startguprof (struct gmonparam *p);
134 void stopguprof (struct gmonparam *p);
136 #define startguprof(p)
137 #define stopguprof(p)
144 void mcount (void) __asm(".mcount");
146 /*static void _mcount (uintfptr_t frompc, uintfptr_t selfpc);*/
152 /* XXX doesn't quite work outside kernel yet. */
153 extern int cputime_bias;
157 void empty_loop (void);
158 void mexitcount (uintfptr_t selfpc);
159 void nullfunc (void);
160 void nullfunc_loop (void);
164 #endif /* !_MACHINE_PROFILE_H_ */