profile.h (89ec08eebf8c37adf22419feb9fcf64e50f04091) profile.h (590ccf8c744af5629becdbadd2f57d73b33866e9)
1/*-
2 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
3 * All rights reserved.
4 *
5 * Author: Chris G. Demetriou
6 *
7 * Permission to use, copy, modify and distribute this software and
8 * its documentation is hereby granted, provided that both the copyright

--- 18 unchanged lines hidden (view full) ---

27 * from: NetBSD: profile.h,v 1.9 1997/04/06 08:47:37 cgd Exp
28 * from: FreeBSD: src/sys/alpha/include/profile.h,v 1.4 1999/12/29
29 * $FreeBSD$
30 */
31
32#ifndef _MACHINE_PROFILE_H_
33#define _MACHINE_PROFILE_H_
34
1/*-
2 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
3 * All rights reserved.
4 *
5 * Author: Chris G. Demetriou
6 *
7 * Permission to use, copy, modify and distribute this software and
8 * its documentation is hereby granted, provided that both the copyright

--- 18 unchanged lines hidden (view full) ---

27 * from: NetBSD: profile.h,v 1.9 1997/04/06 08:47:37 cgd Exp
28 * from: FreeBSD: src/sys/alpha/include/profile.h,v 1.4 1999/12/29
29 * $FreeBSD$
30 */
31
32#ifndef _MACHINE_PROFILE_H_
33#define _MACHINE_PROFILE_H_
34
35#define _MCOUNT_DECL void mcount
35#define _MCOUNT_DECL void __mcount
36
37#define FUNCTION_ALIGNMENT 16
38
39typedef u_int fptrdiff_t;
40
36
37#define FUNCTION_ALIGNMENT 16
38
39typedef u_int fptrdiff_t;
40
41/*
42 * The mcount trampoline macro, expanded in libc/gmon/mcount.c
43 *
44 * For PowerPC SVR4 ABI profiling, the compiler will insert
45 * a data declaration and code sequence at the start of a routine of the form
46 *
47 * .function_mc: .data
48 * .align 2
49 * .long 0
50 * .text
51 *
52 * function: mflr %r0
53 * addis %r11,%r0, .function_mc@ha
54 * stw %r0,4(%r1)
55 * addi %r0,%r11, .function_mc@l
56 * bl _mcount
57 *
58 * The link register is saved in the LR save word in the caller's
59 * stack frame, r0 is set up to point to the allocated longword,
60 * and control is transferred to _mcount.
61 *
62 * On return from _mcount, the routine should function as it would
63 * with no profiling so _mcount must restore register state to that upon
64 * entry. Any routine called by the _mcount trampoline will save
65 * callee-save registers, so _mcount must make sure it saves volatile
66 * registers that may have state after it returns i.e. parameter registers.
67 *
68 * The FreeBSD libc mcount routine ignores the r0 longword pointer, but
69 * instead requires as parameters the current PC and called PC. The current
70 * PC is obtained from the link register, as a result of "bl _mcount" in
71 * the stub, while the caller's PC is obtained from the LR save word.
72 *
73 * On return from libc mcount, the return is done indirectly with the
74 * ctr register rather than the link register, to allow the link register
75 * to be restored to what it was on entry to the profiled routine.
76 */
77
78#ifdef PIC
79#define _PLT "@plt"
80#else
81#define _PLT
82#endif
83
41#define MCOUNT \
84#define MCOUNT \
42void \
43_mcount() \
44{ \
45}
85__asm(" .globl _mcount \n" \
86" .type _mcount,@function \n" \
87"_mcount: \n" \
88" stwu %r1,-64(%r1) /* alloca for reg save space */ \n" \
89" stw %r3,16(%r1) /* save parameter registers, */ \n" \
90" stw %r4,20(%r1) /* r3-10 */ \n" \
91" stw %r5,24(%r1) \n" \
92" stw %r6,28(%r1) \n" \
93" stw %r7,32(%r1) \n" \
94" stw %r8,36(%r1) \n" \
95" stw %r9,40(%r1) \n" \
96" stw %r10,44(%r1) \n" \
97" \n" \
98" mflr %r4 /* link register is 'selfpc' */ \n" \
99" stw %r4,48(%r1) /* save since bl will scrub */ \n" \
100" lwz %r3,68(%r1) /* get 'frompc' from LR-save */ \n" \
101" bl __mcount" _PLT " /* __mcount(frompc, selfpc)*/ \n" \
102" lwz %r3,68(%r1) \n" \
103" mtlr %r3 /* restore caller's lr */ \n" \
104" lwz %r4,48(%r1) \n" \
105" mtctr %r4 /* set up ctr for call back */ \n" \
106" /* note that blr is not used!*/ \n" \
107" lwz %r3,16(%r1) /* restore r3-10 parameters */ \n" \
108" lwz %r4,20(%r1) \n" \
109" lwz %r5,24(%r1) \n" \
110" lwz %r6,28(%r1) \n" \
111" lwz %r7,32(%r1) \n" \
112" lwz %r8,36(%r1) \n" \
113" lwz %r9,40(%r1) \n" \
114" lwz %r10,44(%r1) \n" \
115" addi %r1,%r1,64 /* blow away alloca save area */ \n" \
116" bctr /* return with indirect call */ \n" \
117"_mcount_end: \n" \
118" .size _mcount,_mcount_end-_mcount");
46
119
120
47#ifdef _KERNEL
121#ifdef _KERNEL
48#define MCOUNT_ENTER(s)
49#define MCOUNT_EXIT(s)
50#define MCOUNT_DECL(s)
122#define MCOUNT_ENTER(s) s = intr_disable();
123#define MCOUNT_EXIT(s) intr_restore(s);
124#define MCOUNT_DECL(s) register_t s
51
52void bintr(void);
53void btrap(void);
54void eintr(void);
55void user(void);
56
57#define MCOUNT_FROMPC_USER(pc) \
58 ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc)

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126void bintr(void);
127void btrap(void);
128void eintr(void);
129void user(void);
130
131#define MCOUNT_FROMPC_USER(pc) \
132 ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc)

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