1 /* $NetBSD: profile.h,v 1.1 2001/02/23 21:23:48 reinoud Exp $ */ 2 3 /* 4 * Copyright (c) 1995-1996 Mark Brinicombe 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Mark Brinicombe. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #define _MCOUNT_DECL void _mcount 33 34 /* 35 * Cannot implement mcount in C as GCC will trash the ip register when it 36 * pushes a trapframe. Pity we cannot insert assembly before the function 37 * prologue. 38 */ 39 #define MCOUNT \ 40 __asm__(".text"); \ 41 __asm__(".align 0"); \ 42 __asm__(".type mcount,@function"); \ 43 __asm__(".global mcount"); \ 44 __asm__("mcount:"); \ 45 /* \ 46 * Preserve registers that are trashed during mcount \ 47 */ \ 48 __asm__("stmfd sp!, {r0-r3, ip, lr}"); \ 49 /* \ 50 * find the return address for mcount, \ 51 * and the return address for mcount's caller. \ 52 * \ 53 * frompcindex = pc pushed by call into self. \ 54 */ \ 55 __asm__("mov r0, ip"); \ 56 /* \ 57 * selfpc = pc pushed by mcount call \ 58 */ \ 59 __asm__("mov r1, lr"); \ 60 /* \ 61 * Call the real mcount code \ 62 */ \ 63 __asm__("bl __mcount"); \ 64 /* \ 65 * Restore registers that were trashed during mcount \ 66 */ \ 67 __asm__("ldmfd sp!, {r0-r3, lr, pc}"); 68 69 #ifdef _KERNEL 70 #include <machine/cpufunc.h> 71 /* 72 * splhigh() and splx() are heavyweight, and call mcount(). Therefore 73 * we disabled interrupts (IRQ, but not FIQ) directly on the CPU. 74 * 75 * We're lucky that the CPSR and 's' both happen to be 'int's. 76 */ 77 #define MCOUNT_ENTER s = SetCPSR(0x0080, 0x0080); /* set IRQ disable bit */ 78 #define MCOUNT_EXIT SetCPSR(0xffffffff, s); /* restore old value */ 79 #endif /* _KERNEL */ 80