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 * $FreeBSD$ 32 */ 33 34 #ifndef _MACHINE_PROFILE_H_ 35 #define _MACHINE_PROFILE_H_ 36 37 #define _MCOUNT_DECL void __mcount 38 39 #define FUNCTION_ALIGNMENT 4 40 41 typedef __ptrdiff_t fptrdiff_t; 42 43 /* 44 * The mcount trampoline macro, expanded in libc/gmon/mcount.c 45 * 46 * For PowerPC SVR4 ABI profiling, the compiler will insert 47 * a data declaration and code sequence at the start of a routine of the form 48 * 49 * .function_mc: .data 50 * .align 2 51 * .long 0 52 * .text 53 * 54 * function: mflr %r0 55 * addis %r11,%r0, .function_mc@ha 56 * stw %r0,4(%r1) 57 * addi %r0,%r11, .function_mc@l 58 * bl _mcount 59 * 60 * The link register is saved in the LR save word in the caller's 61 * stack frame, r0 is set up to point to the allocated longword, 62 * and control is transferred to _mcount. 63 * 64 * On return from _mcount, the routine should function as it would 65 * with no profiling so _mcount must restore register state to that upon 66 * entry. Any routine called by the _mcount trampoline will save 67 * callee-save registers, so _mcount must make sure it saves volatile 68 * registers that may have state after it returns i.e. parameter registers. 69 * 70 * The FreeBSD libc mcount routine ignores the r0 longword pointer, but 71 * instead requires as parameters the current PC and called PC. The current 72 * PC is obtained from the link register, as a result of "bl _mcount" in 73 * the stub, while the caller's PC is obtained from the LR save word. 74 * 75 * On return from libc mcount, the return is done indirectly with the 76 * ctr register rather than the link register, to allow the link register 77 * to be restored to what it was on entry to the profiled routine. 78 */ 79 80 #if defined(__powerpc64__) 81 82 #if !defined(_CALL_ELF) || _CALL_ELF == 1 83 #define MCOUNT_PREAMBLE \ 84 " .align 2 \n" \ 85 " .globl _mcount \n" \ 86 " .section \".opd\",\"aw\" \n" \ 87 " .align 3 \n" \ 88 "_mcount: \n" \ 89 " .quad .L._mcount,.TOC.@tocbase,0\n" \ 90 " .previous \n" \ 91 " .size _mcount,24 \n" \ 92 " .type _mcount,@function \n" \ 93 " .align 4 \n" \ 94 ".L._mcount: \n" 95 #else 96 #define MCOUNT_PREAMBLE \ 97 " .globl _mcount \n" \ 98 " .type _mcount,@function \n" \ 99 " .align 4 \n" \ 100 "_mcount: \n" 101 #endif 102 103 #define MCOUNT \ 104 __asm( MCOUNT_PREAMBLE \ 105 " stdu %r1,-(288+128)(%r1) \n" \ 106 " std %r3,48(%r1) \n" \ 107 " std %r4,56(%r1) \n" \ 108 " std %r5,64(%r1) \n" \ 109 " std %r6,72(%r1) \n" \ 110 " std %r7,80(%r1) \n" \ 111 " std %r8,88(%r1) \n" \ 112 " std %r9,96(%r1) \n" \ 113 " std %r10,104(%r1) \n" \ 114 " mflr %r4 \n" \ 115 " std %r4,112(%r1) \n" \ 116 " ld %r3,0(%r1) \n" \ 117 " ld %r3,0(%r3) \n" \ 118 " ld %r3,16(%r3) \n" \ 119 " bl __mcount \n" \ 120 " nop \n" \ 121 " ld %r4,112(%r1) \n" \ 122 " mtlr %r4 \n" \ 123 " ld %r3,48(%r1) \n" \ 124 " ld %r4,56(%r1) \n" \ 125 " ld %r5,64(%r1) \n" \ 126 " ld %r6,72(%r1) \n" \ 127 " ld %r7,80(%r1) \n" \ 128 " ld %r8,88(%r1) \n" \ 129 " ld %r9,96(%r1) \n" \ 130 " ld %r10,104(%r1) \n" \ 131 " addi %r1,%r1,(288+128) \n" \ 132 " blr \n"); 133 #else 134 135 #ifdef PIC 136 #define _PLT "@plt" 137 #else 138 #define _PLT 139 #endif 140 141 #define MCOUNT \ 142 __asm( " .globl _mcount \n" \ 143 " .type _mcount,@function \n" \ 144 " .align 4 \n" \ 145 "_mcount: \n" \ 146 " stwu %r1,-64(%r1) \n" \ 147 " stw %r3,16(%r1) \n" \ 148 " stw %r4,20(%r1) \n" \ 149 " stw %r5,24(%r1) \n" \ 150 " stw %r6,28(%r1) \n" \ 151 " stw %r7,32(%r1) \n" \ 152 " stw %r8,36(%r1) \n" \ 153 " stw %r9,40(%r1) \n" \ 154 " stw %r10,44(%r1) \n" \ 155 " mflr %r4 \n" \ 156 " stw %r4,48(%r1) \n" \ 157 " lwz %r3,68(%r1) \n" \ 158 " bl __mcount" _PLT " \n" \ 159 " lwz %r3,68(%r1) \n" \ 160 " mtlr %r3 \n" \ 161 " lwz %r4,48(%r1) \n" \ 162 " mtctr %r4 \n" \ 163 " lwz %r3,16(%r1) \n" \ 164 " lwz %r4,20(%r1) \n" \ 165 " lwz %r5,24(%r1) \n" \ 166 " lwz %r6,28(%r1) \n" \ 167 " lwz %r7,32(%r1) \n" \ 168 " lwz %r8,36(%r1) \n" \ 169 " lwz %r9,40(%r1) \n" \ 170 " lwz %r10,44(%r1) \n" \ 171 " addi %r1,%r1,64 \n" \ 172 " bctr \n" \ 173 "_mcount_end: \n" \ 174 " .size _mcount,_mcount_end-_mcount"); 175 #endif 176 177 #ifdef _KERNEL 178 #define MCOUNT_ENTER(s) s = intr_disable() 179 #define MCOUNT_EXIT(s) intr_restore(s) 180 #define MCOUNT_DECL(s) register_t s; 181 182 #ifndef COMPILING_LINT 183 #ifdef AIM 184 #include <machine/trap.h> 185 #define __PROFILE_VECTOR_BASE EXC_RST 186 #define __PROFILE_VECTOR_TOP (EXC_LAST + 0x100) 187 #endif /* AIM */ 188 #if defined(BOOKE) 189 extern char interrupt_vector_base[]; 190 extern char interrupt_vector_top[]; 191 #define __PROFILE_VECTOR_BASE (uintfptr_t)interrupt_vector_base 192 #define __PROFILE_VECTOR_TOP (uintfptr_t)interrupt_vector_top 193 #endif /* BOOKE_E500 */ 194 195 #endif /* !COMPILING_LINT */ 196 197 #ifndef __PROFILE_VECTOR_BASE 198 #define __PROFILE_VECTOR_BASE 0 199 #endif 200 #ifndef __PROFILE_VECTOR_TOP 201 #define __PROFILE_VECTOR_TOP 1 202 #endif 203 204 static __inline void 205 powerpc_profile_interrupt(void) 206 { 207 } 208 209 static __inline void 210 powerpc_profile_userspace(void) 211 { 212 } 213 214 #define MCOUNT_FROMPC_USER(pc) \ 215 ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? \ 216 (uintfptr_t)powerpc_profile_userspace : pc) 217 218 #define MCOUNT_FROMPC_INTR(pc) \ 219 ((pc >= __PROFILE_VECTOR_BASE && \ 220 pc < __PROFILE_VECTOR_TOP) ? \ 221 (uintfptr_t)powerpc_profile_interrupt : ~0U) 222 223 void __mcount(uintfptr_t frompc, uintfptr_t selfpc); 224 225 #else /* !_KERNEL */ 226 227 #ifdef __powerpc64__ 228 typedef u_long uintfptr_t; 229 #else 230 typedef u_int uintfptr_t; 231 #endif 232 233 #endif /* _KERNEL */ 234 235 #endif /* !_MACHINE_PROFILE_H_ */ 236