1 /* $NetBSD: profile.h,v 1.14 2014/05/11 02:02:14 joerg 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, pc}"); \ 80 __asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME); 81 #elif defined(__ARM_DWARF_EH__) 82 #define MCOUNT \ 83 __asm(".text"); \ 84 __asm(".align 0"); \ 85 __asm(".arm"); \ 86 __asm(".type " MCOUNT_ASM_NAME ",%function"); \ 87 __asm(".global " MCOUNT_ASM_NAME); \ 88 __asm(MCOUNT_ASM_NAME ":"); \ 89 __asm(".cfi_startproc"); \ 90 /* \ 91 * Preserve registers that are trashed during mcount \ 92 */ \ 93 __asm("push {r0-r4, ip, lr}"); \ 94 __asm(".cfi_def_cfa_offset 24"); \ 95 __asm(".cfi_offset 14, -4"); \ 96 __asm(".cfi_offset 4, -8"); \ 97 __asm(".cfi_offset 3, -12"); \ 98 __asm(".cfi_offset 2, -16"); \ 99 __asm(".cfi_offset 1, -20"); \ 100 __asm(".cfi_offset 0, -24"); \ 101 /* \ 102 * find the return address for mcount, \ 103 * and the return address for mcount's caller. \ 104 * \ 105 * frompcindex = pc pushed by call into self. \ 106 */ \ 107 __asm("mov r0, ip"); \ 108 /* \ 109 * selfpc = pc pushed by mcount call \ 110 */ \ 111 __asm("mov r1, lr"); \ 112 /* \ 113 * Call the real mcount code \ 114 */ \ 115 __asm("bl " ___STRING(_C_LABEL(_mcount)) PLTSYM); \ 116 /* \ 117 * Restore registers that were trashed during mcount \ 118 */ \ 119 __asm("pop {r0-r4, lr, pc}"); \ 120 __asm(".cfi_endproc"); \ 121 __asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME); 122 #else 123 #define MCOUNT \ 124 __asm(".text"); \ 125 __asm(".align 0"); \ 126 __asm(".arm"); \ 127 __asm(".type " MCOUNT_ASM_NAME ",%function"); \ 128 __asm(".global " MCOUNT_ASM_NAME); \ 129 __asm(MCOUNT_ASM_NAME ":"); \ 130 __asm(".fnstart"); \ 131 __asm(".cfi_startproc"); \ 132 /* \ 133 * Preserve registers that are trashed during mcount \ 134 */ \ 135 __asm("push {r0-r4, ip, lr}"); \ 136 __asm(".save {r0-r4, lr}"); \ 137 __asm(".cfi_def_cfa_offset 24"); \ 138 __asm(".cfi_offset 14, -4"); \ 139 __asm(".cfi_offset 4, -8"); \ 140 __asm(".cfi_offset 3, -12"); \ 141 __asm(".cfi_offset 2, -16"); \ 142 __asm(".cfi_offset 1, -20"); \ 143 __asm(".cfi_offset 0, -24"); \ 144 /* \ 145 * find the return address for mcount, \ 146 * and the return address for mcount's caller. \ 147 * \ 148 * frompcindex = pc pushed by call into self. \ 149 */ \ 150 __asm("mov r0, ip"); \ 151 /* \ 152 * selfpc = pc pushed by mcount call \ 153 */ \ 154 __asm("mov r1, lr"); \ 155 /* \ 156 * Call the real mcount code \ 157 */ \ 158 __asm("bl " ___STRING(_C_LABEL(_mcount)) PLTSYM); \ 159 /* \ 160 * Restore registers that were trashed during mcount \ 161 */ \ 162 __asm("pop {r0-r4, lr, pc}"); \ 163 __asm(".cfi_endproc"); \ 164 __asm(".fnend"); \ 165 __asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME); 166 #endif 167 168 #ifdef _KERNEL 169 #ifdef __PROG26 170 extern int int_off_save(void); 171 extern void int_restore(int); 172 #define MCOUNT_ENTER (s = int_off_save()) 173 #define MCOUNT_EXIT int_restore(s) 174 #else 175 #include <arm/cpufunc.h> 176 /* 177 * splhigh() and splx() are heavyweight, and call mcount(). Therefore 178 * we disabled interrupts (IRQ, but not FIQ) directly on the CPU. 179 * 180 * We're lucky that the CPSR and 's' both happen to be 'int's. 181 */ 182 #define MCOUNT_ENTER s = __set_cpsr_c(0x0080, 0x0080); /* kill IRQ */ 183 #define MCOUNT_EXIT __set_cpsr_c(0xffffffff, s); /* restore old value */ 184 #endif /* !acorn26 */ 185 #endif /* _KERNEL */ 186