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 40 typedef __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) 188 extern char interrupt_vector_base[]; 189 extern 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 202 203 static __inline void 204 powerpc_profile_interrupt(void) 205 { 206 } 207 208 static __inline void 209 powerpc_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) 221 222 void __mcount(uintfptr_t frompc, uintfptr_t selfpc); 223 224 #else /* !_KERNEL */ 225 226 #ifdef __powerpc64__ 227 typedef u_long uintfptr_t; 228 #else 229 typedef u_int uintfptr_t; 230 #endif 231 232 #endif /* _KERNEL */ 233 234 #endif /* !_MACHINE_PROFILE_H_ */ 235