profile.h revision 1.9
1 /* $NetBSD: profile.h,v 1.9 2013/08/15 22:41:15 matt Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Ben Harris 5 * Copyright (c) 1995-1996 Mark Brinicombe 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Mark Brinicombe. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #define _MCOUNT_DECL void _mcount 34 35 /* 36 * Cannot implement mcount in C as GCC will trash the ip register when it 37 * pushes a trapframe. Pity we cannot insert assembly before the function 38 * prologue. 39 */ 40 41 #define MCOUNT_ASM_NAME "__mcount" 42 #ifdef PIC 43 #define PLTSYM "(PLT)" 44 #endif 45 46 #ifndef PLTSYM 47 #define PLTSYM 48 #endif 49 50 #if !defined(__thumb__) && !defined(__ARM_EABI__) 51 #define MCOUNT \ 52 __asm(".text"); \ 53 __asm(".align 0"); \ 54 __asm(".type " MCOUNT_ASM_NAME ",%function"); \ 55 __asm(".global " MCOUNT_ASM_NAME); \ 56 __asm(MCOUNT_ASM_NAME ":"); \ 57 /* \ 58 * Preserve registers that are trashed during mcount \ 59 */ \ 60 __asm("push {r0-r3, ip, lr}"); \ 61 /* Check what mode we're in. EQ => 32, NE => 26 */ \ 62 __asm("teq r0, r0"); \ 63 __asm("teq pc, r15"); \ 64 /* \ 65 * find the return address for mcount, \ 66 * and the return address for mcount's caller. \ 67 * \ 68 * frompcindex = pc pushed by call into self. \ 69 */ \ 70 __asm("moveq r0, ip"); \ 71 __asm("bicne r0, ip, #0xfc000003"); \ 72 /* \ 73 * selfpc = pc pushed by mcount call \ 74 */ \ 75 __asm("moveq r1, lr"); \ 76 __asm("bicne r1, lr, #0xfc000003"); \ 77 /* \ 78 * Call the real mcount code \ 79 */ \ 80 __asm("bl " ___STRING(_C_LABEL(_mcount)) PLTSYM); \ 81 /* \ 82 * Restore registers that were trashed during mcount \ 83 */ \ 84 __asm("pop {r0-r3, lr, pc}"); \ 85 __asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME); 86 #elif !defined(__thumb__) || defined(_ARM_ARCH_T2) 87 #define MCOUNT \ 88 __asm(".text"); \ 89 __asm(".align 0"); \ 90 __asm(".type " MCOUNT_ASM_NAME ",%function"); \ 91 __asm(".global " MCOUNT_ASM_NAME); \ 92 __asm(MCOUNT_ASM_NAME ":"); \ 93 /* \ 94 * Preserve registers that are trashed during mcount \ 95 */ \ 96 __asm("push {r0-r3, ip, lr}"); \ 97 /* \ 98 * find the return address for mcount, \ 99 * and the return address for mcount's caller. \ 100 * \ 101 * frompcindex = pc pushed by call into self. \ 102 */ \ 103 __asm("mov r0, ip"); \ 104 /* \ 105 * selfpc = pc pushed by mcount call \ 106 */ \ 107 __asm("mov r1, lr"); \ 108 /* \ 109 * Call the real mcount code \ 110 */ \ 111 __asm("bl " ___STRING(_C_LABEL(_mcount)) PLTSYM); \ 112 /* \ 113 * Restore registers that were trashed during mcount \ 114 */ \ 115 __asm("pop {r0-r3, lr, pc}"); \ 116 __asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME); 117 #else 118 #define MCOUNT \ 119 __asm(".text"); \ 120 __asm(".align 0"); \ 121 __asm(".thumb_func"); \ 122 __asm(".type " MCOUNT_ASM_NAME ",%function"); \ 123 __asm(".global " MCOUNT_ASM_NAME); \ 124 __asm(MCOUNT_ASM_NAME ":"); \ 125 /* \ 126 * Preserve registers that are trashed during mcount \ 127 */ \ 128 __asm("push {r0-r4,lr}"); \ 129 __asm("mov r4, ip"); \ 130 /* \ 131 * find the return address for mcount, \ 132 * and the return address for mcount's caller. \ 133 * \ 134 * frompcindex = pc pushed by call into self. \ 135 */ \ 136 __asm("mov r0, ip"); \ 137 /* \ 138 * selfpc = pc pushed by mcount call \ 139 */ \ 140 __asm("mov r1, lr"); \ 141 /* \ 142 * Call the real mcount code \ 143 */ \ 144 __asm("bl " ___STRING(_C_LABEL(_mcount)) PLTSYM); \ 145 /* \ 146 * Restore registers that were trashed during mcount \ 147 */ \ 148 __asm("mov lr, r4"); \ 149 __asm("pop {r0-r4, pc}"); \ 150 __asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME); 151 #endif 152 153 #ifdef _KERNEL 154 #ifdef __PROG26 155 extern int int_off_save(void); 156 extern void int_restore(int); 157 #define MCOUNT_ENTER (s = int_off_save()) 158 #define MCOUNT_EXIT int_restore(s) 159 #else 160 #include <arm/cpufunc.h> 161 /* 162 * splhigh() and splx() are heavyweight, and call mcount(). Therefore 163 * we disabled interrupts (IRQ, but not FIQ) directly on the CPU. 164 * 165 * We're lucky that the CPSR and 's' both happen to be 'int's. 166 */ 167 #define MCOUNT_ENTER s = __set_cpsr_c(0x0080, 0x0080); /* kill IRQ */ 168 #define MCOUNT_EXIT __set_cpsr_c(0xffffffff, s); /* restore old value */ 169 #endif /* !acorn26 */ 170 #endif /* _KERNEL */ 171
Indexes created Mon Sep 22 13:09:51 GMT 2025