/* Implementation of profiling support.  ARM EABI version.

   Copyright (C) 2008-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library.  If not, see

   <http://www.gnu.org/licenses/>.  */

/* Don't call mcount when calling mcount...  */

#undef PROF

#include <sysdep.h>

#undef mcount

#ifdef __thumb2__

	.thumb

#endif

	.syntax unified

/* Use an assembly stub with a special ABI.  The calling lr has been

   pushed to the stack (which will be misaligned).  We should preserve

   all registers except ip and pop a word off the stack.

   NOTE: This assumes mcount_internal does not clobber any non-core

   (coprocessor) registers.  Currently this is true, but may require

   additional attention in the future.

   The calling sequence looks something like:

func:

   push {lr}

   bl __gnu_mcount_nc

   <function body>

*/

ENTRY(__gnu_mcount_nc)

	push {r0, r1, r2, r3, lr}

	cfi_adjust_cfa_offset (20)

	cfi_rel_offset (r0, 0)

	cfi_rel_offset (r1, 4)

	cfi_rel_offset (r2, 8)

	cfi_rel_offset (r3, 12)

	cfi_rel_offset (lr, 16)

	bic r1, lr, #1

	ldr r0, [sp, #20]

	bl __mcount_internal

	pop {r0, r1, r2, r3, ip, lr}

	cfi_adjust_cfa_offset (-24)

	cfi_restore (r0)

	cfi_restore (r1)

	cfi_restore (r2)

	cfi_restore (r3)

	cfi_register (lr, ip)

	bx ip

END(__gnu_mcount_nc)

#include <gcc-compat.h>

#include <shlib-compat.h>

/* The new __gnu_mcount_nc entry point was introduced in 4.4, so the

   static library needs the old one only to support older compilers.

   Even in a configuration that only cares about newer compilers, the

   shared library might need it only for strict ABI compatibility.  */

#if GCC_COMPAT (4, 3) || SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_19)

/* Provide old mcount for backwards compatibility.  This requires

   code be compiled with APCS frame pointers.  */

ENTRY(__mcount_arm_compat)

	push	{r0, r1, r2, r3, fp, lr}

	cfi_adjust_cfa_offset (24)

	cfi_rel_offset (r0, 0)

	cfi_rel_offset (r1, 4)

	cfi_rel_offset (r2, 8)

	cfi_rel_offset (r3, 12)

	cfi_rel_offset (fp, 16)

	cfi_rel_offset (lr, 20)

	movs r0, fp

	ittt ne

	ldrne r0, [r0, #-4]

	movsne r1, lr

	blne __mcount_internal

# if defined (__ARM_ARCH_4T__) && defined (__THUMB_INTERWORK__)

	pop	{r0, r1, r2, r3, fp, lr}

	cfi_adjust_cfa_offset (-24)

	cfi_restore (r0)

	cfi_restore (r1)

	cfi_restore (r2)

	cfi_restore (r3)

	cfi_restore (fp)

	cfi_restore (lr)

	bx lr

# else

	pop	{r0, r1, r2, r3, fp, pc}

# endif

END(__mcount_arm_compat)

#endif

#if GCC_COMPAT (4, 3)

strong_alias (__mcount_arm_compat, _mcount)

/* The canonical name for the function is `_mcount' in both C and asm,

   but some old asm code might assume it's `mcount'.  */

weak_alias (_mcount, mcount)

#elif SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_19)

compat_symbol (libc, __mcount_arm_compat, _mcount, GLIBC_2_0)

strong_alias (__mcount_arm_compat, __mcount_arm_compat_1)

compat_symbol (libc, __mcount_arm_compat_1, mcount, GLIBC_2_0)

#endif