1/* $NetBSD: profile.h,v 1.18 2018/01/24 09:04:45 skrll 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#define PLTSYM 43 44#if !defined(__ARM_EABI__) 45#define MCOUNT \ 46 __asm(".text"); \ 47 __asm(".align 0"); \ 48 __asm(".arm"); \ 49 __asm(".type " MCOUNT_ASM_NAME ",%function"); \ 50 __asm(".global " MCOUNT_ASM_NAME); \ 51 __asm(MCOUNT_ASM_NAME ":"); \ 52 /* \ 53 * Preserve registers that are trashed during mcount \ 54 */ \ 55 __asm("push {r0-r3, ip, lr}"); \ 56 /* Check what mode we're in. EQ => 32, NE => 26 */ \ 57 __asm("teq r0, r0"); \ 58 __asm("teq pc, r15"); \ 59 /* \ 60 * find the return address for mcount, \ 61 * and the return address for mcount's caller. \ 62 * \ 63 * frompcindex = pc pushed by call into self. \ 64 */ \ 65 __asm("moveq r0, ip"); \ 66 __asm("bicne r0, ip, #0xfc000003"); \ 67 /* \ 68 * selfpc = pc pushed by mcount call \ 69 */ \ 70 __asm("moveq r1, lr"); \ 71 __asm("bicne r1, lr, #0xfc000003"); \ 72 /* \ 73 * Call the real mcount code \ 74 */ \ 75 __asm("bl " ___STRING(_C_LABEL(_mcount)) PLTSYM); \ 76 /* \ 77 * Restore registers that were trashed during mcount \ 78 */ \ 79 __asm("pop {r0-r3, lr}"); \ 80 __asm("pop {pc}"); \ 81 __asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME); 82#elif defined(__ARM_DWARF_EH__) 83#define MCOUNT \ 84 __asm(".text"); \ 85 __asm(".align 0"); \ 86 __asm(".arm"); \ 87 __asm(".type " MCOUNT_ASM_NAME ",%function"); \ 88 __asm(".global " MCOUNT_ASM_NAME); \ 89 __asm(MCOUNT_ASM_NAME ":"); \ 90 __asm(".cfi_startproc"); \ 91 /* \ 92 * Preserve registers that are trashed during mcount \ 93 */ \ 94 __asm("push {r0-r3, ip, lr}"); \ 95 __asm(".cfi_def_cfa_offset 24"); \ 96 __asm(".cfi_offset 14, -4"); \ 97 __asm(".cfi_offset 12, -8"); \ 98 __asm(".cfi_offset 3, -12"); \ 99 __asm(".cfi_offset 2, -16"); \ 100 __asm(".cfi_offset 1, -20"); \ 101 __asm(".cfi_offset 0, -24"); \ 102 /* \ 103 * find the return address for mcount, \ 104 * and the return address for mcount's caller. \ 105 * \ 106 * frompcindex = pc pushed by call into self. \ 107 */ \ 108 __asm("mov r0, ip"); \ 109 /* \ 110 * selfpc = pc pushed by mcount call \ 111 */ \ 112 __asm("mov r1, lr"); \ 113 /* \ 114 * Call the real mcount code \ 115 */ \ 116 __asm("bl " ___STRING(_C_LABEL(_mcount)) PLTSYM); \ 117 /* \ 118 * Restore registers that were trashed during mcount \ 119 */ \ 120 __asm("pop {r0-r3, lr}"); \ 121 __asm("pop {pc}"); \ 122 __asm(".cfi_endproc"); \ 123 __asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME); 124#else 125#define MCOUNT \ 126 __asm(".text"); \ 127 __asm(".align 0"); \ 128 __asm(".arm"); \ 129 __asm(".type " MCOUNT_ASM_NAME ",%function"); \ 130 __asm(".global " MCOUNT_ASM_NAME); \ 131 __asm(MCOUNT_ASM_NAME ":"); \ 132 __asm(".fnstart"); \ 133 __asm(".cfi_startproc"); \ 134 /* \ 135 * Preserve registers that are trashed during mcount \ 136 */ \ 137 __asm("push {r0-r3, ip, lr}"); \ 138 __asm(".save {r0-r3, lr}"); \ 139 __asm(".cfi_def_cfa_offset 24"); \ 140 __asm(".cfi_offset 14, -4"); \ 141 __asm(".cfi_offset 12, -8"); \ 142 __asm(".cfi_offset 3, -12"); \ 143 __asm(".cfi_offset 2, -16"); \ 144 __asm(".cfi_offset 1, -20"); \ 145 __asm(".cfi_offset 0, -24"); \ 146 /* \ 147 * find the return address for mcount, \ 148 * and the return address for mcount's caller. \ 149 * \ 150 * frompcindex = pc pushed by call into self. \ 151 */ \ 152 __asm("mov r0, ip"); \ 153 /* \ 154 * selfpc = pc pushed by mcount call \ 155 */ \ 156 __asm("mov r1, lr"); \ 157 /* \ 158 * Call the real mcount code \ 159 */ \ 160 __asm("bl " ___STRING(_C_LABEL(_mcount)) PLTSYM); \ 161 /* \ 162 * Restore registers that were trashed during mcount \ 163 */ \ 164 __asm("pop {r0-r3, lr}"); \ 165 __asm("pop {pc}"); \ 166 __asm(".cfi_endproc"); \ 167 __asm(".fnend"); \ 168 __asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME); 169#endif 170 171#ifdef _KERNEL 172#include <arm/cpufunc.h> 173/* 174 * splhigh() and splx() are heavyweight, and call mcount(). Therefore 175 * we disabled interrupts (IRQ, but not FIQ) directly on the CPU. 176 * 177 * We're lucky that the CPSR and 's' both happen to be 'int's. 178 */ 179#define MCOUNT_ENTER s = __set_cpsr_c(0x0080, 0x0080); /* kill IRQ */ 180#define MCOUNT_EXIT __set_cpsr_c(0xffffffff, s); /* restore old value */ 181#endif /* _KERNEL */ 182