1 /* $OpenBSD: profile.h,v 1.1 2020/06/25 01:55:14 drahn Exp $ */ 2 3 /* 4 * Copyright (c) 2020 Dale Rahn drahn@openbsd.org 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 /* 20 * mcount frame size skips over the red zone (288B) (calling function may use) 21 * and 128 bytes of local storage (32 bytes of reserved and 96 of our storage 22 * this function assumes it will only every call the local __mcount function 23 */ 24 #define MCOUNT \ 25 __asm__(" \n"\ 26 " .section \".text\" \n"\ 27 " .p2align 2 \n"\ 28 " .globl _mcount \n"\ 29 " .local __mcount \n"\ 30 " .type _mcount,@function \n"\ 31 "_mcount: \n"\ 32 ".L_mcount_gep0: \n"\ 33 " addis %r2, %r12, .TOC.-.L_mcount_gep0@ha; \n"\ 34 " addi %r2, %r2, .TOC.-.L_mcount_gep0@l; \n"\ 35 ".L_mcount_lep0: \n"\ 36 ".localentry _mcount, .L_mcount_lep0-.L_mcount_gep0; \n"\ 37 " ld %r11,16(%r1) \n"\ 38 " mflr %r0 \n"\ 39 " std %r0, 16(%r1) \n"\ 40 " stdu %r1,-(288+128)(%r1) \n"\ 41 " std %r3, 32(%r1) \n"\ 42 " std %r4, 40(%r1) \n"\ 43 " std %r5, 48(%r1) \n"\ 44 " std %r6, 56(%r1) \n"\ 45 " std %r7, 64(%r1) \n"\ 46 " std %r8, 72(%r1) \n"\ 47 " std %r9, 80(%r1) \n"\ 48 " std %r10,88(%r1) \n"\ 49 " std %r11,96(%r1) \n"\ 50 " mr %r4, %r0 \n"\ 51 " mr %r3, %r11 \n"\ 52 " bl __mcount \n"\ 53 " nop \n"\ 54 " ld %r3, 32(%r1) \n"\ 55 " ld %r4, 40(%r1) \n"\ 56 " ld %r5, 48(%r1) \n"\ 57 " ld %r6, 56(%r1) \n"\ 58 " ld %r7, 64(%r1) \n"\ 59 " ld %r8, 72(%r1) \n"\ 60 " ld %r9, 80(%r1) \n"\ 61 " ld %r10,88(%r1) \n"\ 62 " ld %r11,96(%r1) \n"\ 63 " addi %r1, %r1, (288+128) \n"\ 64 " ld %r0, 16(%r1) \n"\ 65 " std %r11,16(%r1) \n"\ 66 " mtlr %r0 \n"\ 67 " blr \n"\ 68 " .size _mcount, .-_mcount \n"\ 69 ); 70 #define _MCOUNT_DECL static void __mcount 71