1 /* $NetBSD: profile.h,v 1.8 2008/08/29 19:08:29 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 #define MCOUNT \ 51 __asm(".text"); \ 52 __asm(".align 0"); \ 53 __asm(".type " MCOUNT_ASM_NAME ",%function"); \ 54 __asm(".global " MCOUNT_ASM_NAME); \ 55 __asm(MCOUNT_ASM_NAME ":"); \ 56 /* \ 57 * Preserve registers that are trashed during mcount \ 58 */ \ 59 __asm("stmfd sp!, {r0-r3, ip, lr}"); \ 60 /* Check what mode we're in. EQ => 32, NE => 26 */ \ 61 __asm("teq r0, r0"); \ 62 __asm("teq pc, r15"); \ 63 /* \ 64 * find the return address for mcount, \ 65 * and the return address for mcount's caller. \ 66 * \ 67 * frompcindex = pc pushed by call into self. \ 68 */ \ 69 __asm("moveq r0, ip"); \ 70 __asm("bicne r0, ip, #0xfc000003"); \ 71 /* \ 72 * selfpc = pc pushed by mcount call \ 73 */ \ 74 __asm("moveq r1, lr"); \ 75 __asm("bicne r1, lr, #0xfc000003"); \ 76 /* \ 77 * Call the real mcount code \ 78 */ \ 79 __asm("bl " ___STRING(_C_LABEL(_mcount)) PLTSYM); \ 80 /* \ 81 * Restore registers that were trashed during mcount \ 82 */ \ 83 __asm("ldmfd sp!, {r0-r3, lr, pc}"); 84 85 #ifdef _KERNEL 86 #ifdef __PROG26 87 extern int int_off_save(void); 88 extern void int_restore(int); 89 #define MCOUNT_ENTER (s = int_off_save()) 90 #define MCOUNT_EXIT int_restore(s) 91 #else 92 #include <arm/cpufunc.h> 93 /* 94 * splhigh() and splx() are heavyweight, and call mcount(). Therefore 95 * we disabled interrupts (IRQ, but not FIQ) directly on the CPU. 96 * 97 * We're lucky that the CPSR and 's' both happen to be 'int's. 98 */ 99 #define MCOUNT_ENTER s = __set_cpsr_c(0x0080, 0x0080); /* kill IRQ */ 100 #define MCOUNT_EXIT __set_cpsr_c(0xffffffff, s); /* restore old value */ 101 #endif /* !acorn26 */ 102 #endif /* _KERNEL */ 103