/*      $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