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/* $OpenBSD: profile.h,v 1.1 2020/06/25 01:55:14 drahn Exp $ */
/*
* Copyright (c) 2020 Dale Rahn drahn@openbsd.org
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* mcount frame size skips over the red zone (288B) (calling function may use)
* and 128 bytes of local storage (32 bytes of reserved and 96 of our storage
* this function assumes it will only every call the local __mcount function
*/
#define MCOUNT \
__asm__(" \n"\
" .section \".text\" \n"\
" .p2align 2 \n"\
" .globl _mcount \n"\
" .local __mcount \n"\
" .type _mcount,@function \n"\
"_mcount: \n"\
".L_mcount_gep0: \n"\
" addis %r2, %r12, .TOC.-.L_mcount_gep0@ha; \n"\
" addi %r2, %r2, .TOC.-.L_mcount_gep0@l; \n"\
".L_mcount_lep0: \n"\
".localentry _mcount, .L_mcount_lep0-.L_mcount_gep0; \n"\
" ld %r11,16(%r1) \n"\
" mflr %r0 \n"\
" std %r0, 16(%r1) \n"\
" stdu %r1,-(288+128)(%r1) \n"\
" std %r3, 32(%r1) \n"\
" std %r4, 40(%r1) \n"\
" std %r5, 48(%r1) \n"\
" std %r6, 56(%r1) \n"\
" std %r7, 64(%r1) \n"\
" std %r8, 72(%r1) \n"\
" std %r9, 80(%r1) \n"\
" std %r10,88(%r1) \n"\
" std %r11,96(%r1) \n"\
" mr %r4, %r0 \n"\
" mr %r3, %r11 \n"\
" bl __mcount \n"\
" nop \n"\
" ld %r3, 32(%r1) \n"\
" ld %r4, 40(%r1) \n"\
" ld %r5, 48(%r1) \n"\
" ld %r6, 56(%r1) \n"\
" ld %r7, 64(%r1) \n"\
" ld %r8, 72(%r1) \n"\
" ld %r9, 80(%r1) \n"\
" ld %r10,88(%r1) \n"\
" ld %r11,96(%r1) \n"\
" addi %r1, %r1, (288+128) \n"\
" ld %r0, 16(%r1) \n"\
" std %r11,16(%r1) \n"\
" mtlr %r0 \n"\
" blr \n"\
" .size _mcount, .-_mcount \n"\
);
#define _MCOUNT_DECL static void __mcount
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