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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/cpu/i386/include/profile.h,v 1.9 2006/11/07 17:51:21 dillon Exp $
38 #ifndef _CPU_PROFILE_H_
39 #define _CPU_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 struct spinlock_deprecated;
76 extern struct spinlock_deprecated mcount_spinlock;
77 void spin_lock_np(struct spinlock_deprecated *sp);
78 void spin_unlock_np(struct spinlock_deprecated *sp);
79 #define MCOUNT_ENTER(s) { s = read_eflags(); \
80 __asm __volatile("cli" : : : "memory"); \
81 spin_lock_np(&mcount_spinlock); }
82 #define MCOUNT_EXIT(s) { spin_unlock_np(&mcount_spinlock); write_eflags(s); }
84 #define MCOUNT_ENTER(s) { s = read_eflags(); cpu_disable_intr(); }
85 #define MCOUNT_EXIT(s) (write_eflags(s))
91 #define FUNCTION_ALIGNMENT 4
93 #define _MCOUNT_DECL static __inline void _mcount
99 register int c asm("ecx"); \
100 register int d asm("edx"); \
101 register int a asm("eax"); \
102 uintfptr_t selfpc, frompc; \
104 * mcount can't trash any registers, but _mcount \
105 * follows the i386 abi and considers eax, ecx and \
106 * edx caller-saved. We're the caller, so save them \
109 asm("push %%ecx" : : "r" (c) : "memory"); \
110 asm("push %%edx" : : "r" (d): "memory"); \
111 asm("push %%eax" : : "r" (a) : "memory"); \
113 * Find the return address for mcount, \
114 * and the return address for mcount's caller. \
116 * selfpc = pc pushed by call to mcount \
118 asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \
120 * frompc = pc pushed by call to mcount's caller. \
121 * The caller's stack frame has already been built, so %ebp is \
122 * the caller's frame pointer. The caller's raddr is in the \
123 * caller's frame following the caller's caller's frame pointer. \
125 asm("movl (%%ebp),%0" : "=r" (frompc)); \
126 frompc = ((uintfptr_t *)frompc)[1]; \
127 _mcount(frompc, selfpc); \
128 /* restore the registers that _mcount possibly trashed */ \
129 asm volatile ("pop %%eax" : "=r" (a) : ); \
130 asm volatile ("pop %%edx" : "=r" (d) : ); \
131 asm volatile ("pop %%ecx" : "=r" (c) : ); \
134 typedef unsigned int uintfptr_t;
139 * An unsigned integral type that can hold non-negative difference between
142 typedef u_int fptrdiff_t;
146 void mcount (uintfptr_t frompc, uintfptr_t selfpc);
151 void nullfunc_loop_profiled (void);
152 void nullfunc_profiled (void);
153 void startguprof (struct gmonparam *p);
154 void stopguprof (struct gmonparam *p);
156 #define startguprof(p)
157 #define stopguprof(p)
164 void mcount (void) __asm(".mcount");
166 /*static void _mcount (uintfptr_t frompc, uintfptr_t selfpc);*/
172 /* XXX doesn't quite work outside kernel yet. */
173 extern int cputime_bias;
177 void empty_loop (void);
178 void mexitcount (uintfptr_t selfpc);
179 void nullfunc (void);
180 void nullfunc_loop (void);
184 #endif /* !_CPU_PROFILE_H_ */