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/* $OpenBSD: profile.h,v 1.1 2016/12/17 23:38:33 patrick Exp $ */
/*
* Copyright (c) 2015 Dale Rahn <drahn@dalerahn.com>
*
* 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.
*/
#define _MCOUNT_DECL void _mcount
#define MCOUNT_ASM_NAME "__mcount"
#ifdef __PIC__
#define PLTSYM "" /* XXX -aarch64 defaults to PLT? */
#else
#define PLTSYM ""
#endif
#define MCOUNT \
__asm__ (".text;" \
".align 3;" \
".globl " MCOUNT_ASM_NAME ";" \
".type " MCOUNT_ASM_NAME ",@function;" \
MCOUNT_ASM_NAME ":;" \
" stp x0, x1, [sp, #-160]!;" \
" stp x2, x3, [sp, #16];" \
" stp x4, x5, [sp, #32];" \
" stp x6, x7, [sp, #48];" \
" stp x8, x9, [sp, #64];" \
" stp x10,x11,[sp, #80];" \
" stp x12,x13,[sp, #96];" \
" stp x14,x15,[sp, #112];" \
" stp x16,x17,[sp, #128];" \
" stp x29,lr, [sp, #144];" \
/* load from pc at 8 off frame pointer */ \
" ldr x0, [x29, #8];" \
" mov x1, lr;" \
" bl " __STRING(_mcount) PLTSYM ";" \
/* restore argument registers */ \
" ldp x2, x3, [sp, #16];" \
" ldp x4, x5, [sp, #32];" \
" ldp x6, x7, [sp, #48];" \
" ldp x8, x9, [sp, #64];" \
" ldp x10,x11,[sp, #80];" \
" ldp x12,x13,[sp, #96];" \
" ldp x14,x15,[sp, #112];" \
" ldp x16,x17,[sp, #128];" \
" ldp x29,lr, [sp, #144];" \
" ldp x0, x1, [sp], #160;" \
" ret;");
#ifdef _KERNEL
// Change this to dair read/set, then restore.
#define MCOUNT_ENTER \
__asm__ ("mrs %x0,daif; msr daifset, #0x2": "=r"(s));
#define MCOUNT_EXIT \
__asm__ ("msr daif, %x0":: "r"(s));
#endif // _KERNEL
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