1/*-
2 * SPDX-License-Identifier: MIT-CMU
3 *
4 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
5 * All rights reserved.
6 *
7 * Author: Chris G. Demetriou
8 *
9 * Permission to use, copy, modify and distribute this software and
10 * its documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
22 * School of Computer Science
23 * Carnegie Mellon University
24 * Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie the
27 * rights to redistribute these changes.
28 *
29 * from: NetBSD: profile.h,v 1.9 1997/04/06 08:47:37 cgd Exp
30 * from: FreeBSD: src/sys/alpha/include/profile.h,v 1.4 1999/12/29
31 */
32
33#ifndef _MACHINE_PROFILE_H_
34#define _MACHINE_PROFILE_H_
35
36#define _MCOUNT_DECL void __mcount
37
38#define FUNCTION_ALIGNMENT 4
39
40typedef __ptrdiff_t fptrdiff_t;
41
42/*
43 * The mcount trampoline macro, expanded in libc/gmon/mcount.c
44 *
45 * For PowerPC SVR4 ABI profiling, the compiler will insert
46 * a data declaration and code sequence at the start of a routine of the form
47 *
48 * .function_mc: .data
49 * .align 2
50 * .long 0
51 * .text
52 *
53 * function: mflr %r0
54 * addis %r11,%r0, .function_mc@ha
55 * stw %r0,4(%r1)
56 * addi %r0,%r11, .function_mc@l
57 * bl _mcount
58 *
59 * The link register is saved in the LR save word in the caller's
60 * stack frame, r0 is set up to point to the allocated longword,
61 * and control is transferred to _mcount.
62 *
63 * On return from _mcount, the routine should function as it would
64 * with no profiling so _mcount must restore register state to that upon
65 * entry. Any routine called by the _mcount trampoline will save
66 * callee-save registers, so _mcount must make sure it saves volatile
67 * registers that may have state after it returns i.e. parameter registers.
68 *
69 * The FreeBSD libc mcount routine ignores the r0 longword pointer, but
70 * instead requires as parameters the current PC and called PC. The current
71 * PC is obtained from the link register, as a result of "bl _mcount" in
72 * the stub, while the caller's PC is obtained from the LR save word.
73 *
74 * On return from libc mcount, the return is done indirectly with the
75 * ctr register rather than the link register, to allow the link register
76 * to be restored to what it was on entry to the profiled routine.
77 */
78
79#if defined(__powerpc64__)
80
81#if !defined(_CALL_ELF) || _CALL_ELF == 1
82#define MCOUNT_PREAMBLE \
83 " .align 2 \n" \
84 " .globl _mcount \n" \
85 " .section \".opd\",\"aw\" \n" \
86 " .align 3 \n" \
87 "_mcount: \n" \
88 " .quad .L._mcount,.TOC.@tocbase,0\n" \
89 " .previous \n" \
90 " .size _mcount,24 \n" \
91 " .type _mcount,@function \n" \
92 " .align 4 \n" \
93 ".L._mcount: \n"
94#else
95#define MCOUNT_PREAMBLE \
96 " .globl _mcount \n" \
97 " .type _mcount,@function \n" \
98 " .align 4 \n" \
99 "_mcount: \n"
100#endif
101
102#define MCOUNT \
103__asm( MCOUNT_PREAMBLE \
104 " stdu %r1,-(288+128)(%r1) \n" \
105 " std %r3,48(%r1) \n" \
106 " std %r4,56(%r1) \n" \
107 " std %r5,64(%r1) \n" \
108 " std %r6,72(%r1) \n" \
109 " std %r7,80(%r1) \n" \
110 " std %r8,88(%r1) \n" \
111 " std %r9,96(%r1) \n" \
112 " std %r10,104(%r1) \n" \
113 " mflr %r4 \n" \
114 " std %r4,112(%r1) \n" \
115 " ld %r3,0(%r1) \n" \
116 " ld %r3,0(%r3) \n" \
117 " ld %r3,16(%r3) \n" \
118 " bl __mcount \n" \
119 " nop \n" \
120 " ld %r4,112(%r1) \n" \
121 " mtlr %r4 \n" \
122 " ld %r3,48(%r1) \n" \
123 " ld %r4,56(%r1) \n" \
124 " ld %r5,64(%r1) \n" \
125 " ld %r6,72(%r1) \n" \
126 " ld %r7,80(%r1) \n" \
127 " ld %r8,88(%r1) \n" \
128 " ld %r9,96(%r1) \n" \
129 " ld %r10,104(%r1) \n" \
130 " addi %r1,%r1,(288+128) \n" \
131 " blr \n");
132#else
133
134#ifdef PIC
135#define _PLT "@plt"
136#else
137#define _PLT
138#endif
139
140#define MCOUNT \
141__asm( " .globl _mcount \n" \
142 " .type _mcount,@function \n" \
143 " .align 4 \n" \
144 "_mcount: \n" \
145 " stwu %r1,-64(%r1) \n" \
146 " stw %r3,16(%r1) \n" \
147 " stw %r4,20(%r1) \n" \
148 " stw %r5,24(%r1) \n" \
149 " stw %r6,28(%r1) \n" \
150 " stw %r7,32(%r1) \n" \
151 " stw %r8,36(%r1) \n" \
152 " stw %r9,40(%r1) \n" \
153 " stw %r10,44(%r1) \n" \
154 " mflr %r4 \n" \
155 " stw %r4,48(%r1) \n" \
156 " lwz %r3,68(%r1) \n" \
157 " bl __mcount" _PLT " \n" \
158 " lwz %r3,68(%r1) \n" \
159 " mtlr %r3 \n" \
160 " lwz %r4,48(%r1) \n" \
161 " mtctr %r4 \n" \
162 " lwz %r3,16(%r1) \n" \
163 " lwz %r4,20(%r1) \n" \
164 " lwz %r5,24(%r1) \n" \
165 " lwz %r6,28(%r1) \n" \
166 " lwz %r7,32(%r1) \n" \
167 " lwz %r8,36(%r1) \n" \
168 " lwz %r9,40(%r1) \n" \
169 " lwz %r10,44(%r1) \n" \
170 " addi %r1,%r1,64 \n" \
171 " bctr \n" \
172 "_mcount_end: \n" \
173 " .size _mcount,_mcount_end-_mcount");
174#endif
175
176#ifdef _KERNEL
177#define MCOUNT_ENTER(s) s = intr_disable()
178#define MCOUNT_EXIT(s) intr_restore(s)
179#define MCOUNT_DECL(s) register_t s;
180
181#ifndef COMPILING_LINT
182#ifdef AIM
183#include <machine/trap.h>
184#define __PROFILE_VECTOR_BASE EXC_RST
185#define __PROFILE_VECTOR_TOP (EXC_LAST + 0x100)
186#endif /* AIM */
187#if defined(BOOKE)
188extern char interrupt_vector_base[];
189extern char interrupt_vector_top[];
190#define __PROFILE_VECTOR_BASE (uintfptr_t)interrupt_vector_base
191#define __PROFILE_VECTOR_TOP (uintfptr_t)interrupt_vector_top
192#endif /* BOOKE_E500 */
193
194#endif /* !COMPILING_LINT */
195
196#ifndef __PROFILE_VECTOR_BASE
197#define __PROFILE_VECTOR_BASE 0
198#endif
199#ifndef __PROFILE_VECTOR_TOP
200#define __PROFILE_VECTOR_TOP 1
201#endif
202
203static __inline void
204powerpc_profile_interrupt(void)
205{
206}
207
208static __inline void
209powerpc_profile_userspace(void)
210{
211}
212
213#define MCOUNT_FROMPC_USER(pc) \
214 ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? \
215 (uintfptr_t)powerpc_profile_userspace : pc)
216
217#define MCOUNT_FROMPC_INTR(pc) \
218 ((pc >= __PROFILE_VECTOR_BASE && \
219 pc < __PROFILE_VECTOR_TOP) ? \
220 (uintfptr_t)powerpc_profile_interrupt : ~0U)
221
222void __mcount(uintfptr_t frompc, uintfptr_t selfpc);
223
224#else /* !_KERNEL */
225
226#ifdef __powerpc64__
227typedef u_long uintfptr_t;
228#else
229typedef u_int uintfptr_t;
230#endif
231
232#endif /* _KERNEL */
233
234#endif /* !_MACHINE_PROFILE_H_ */