84 lines
2.3 KiB
ArmAsm
84 lines
2.3 KiB
ArmAsm
|
/* Implementation of profiling support. ARM EABI version.
|
||
|
|
Copyright (C) 2008, 2009 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, write to the Free
|
||
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||
|
|
02111-1307 USA. */
|
||
|
|
|
||
|
|
/* Don't call mcount when calling mcount... */
|
||
|
|
#undef PROF
|
||
|
|
|
||
|
|
#include <sysdep.h>
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef __thumb2__
|
||
|
|
.thumb
|
||
|
|
.syntax unified
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/* 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_mount_nc
|
||
|
|
<function body>
|
||
|
|
*/
|
||
|
|
|
||
|
|
ENTRY(__gnu_mcount_nc)
|
||
|
|
push {r0, r1, r2, r3, lr}
|
||
|
|
bic r1, lr, #1
|
||
|
|
ldr r0, [sp, #20]
|
||
|
|
bl __mcount_internal
|
||
|
|
pop {r0, r1, r2, r3, ip, lr}
|
||
|
|
bx ip
|
||
|
|
END(__gnu_mcount_nc)
|
||
|
|
|
||
|
|
|
||
|
|
/* Provide old mcount for backwards compatibility. This requires
|
||
|
|
code be compiled with APCS frame pointers. */
|
||
|
|
|
||
|
|
ENTRY(_mcount)
|
||
|
|
stmdb sp!, {r0, r1, r2, r3, fp, lr}
|
||
|
|
#ifdef __thumb2__
|
||
|
|
movs r0, fp
|
||
|
|
ittt ne
|
||
|
|
ldrne r0, [r0, #-4]
|
||
|
|
#else
|
||
|
|
movs fp, fp
|
||
|
|
ldrne r0, [fp, #-4]
|
||
|
|
#endif
|
||
|
|
movnes r1, lr
|
||
|
|
blne __mcount_internal
|
||
|
|
#ifdef __thumb2__
|
||
|
|
ldmia sp!, {r0, r1, r2, r3, fp, pc}
|
||
|
|
#else
|
||
|
|
ldmia sp!, {r0, r1, r2, r3, fp, lr}
|
||
|
|
bx lr
|
||
|
|
#endif
|
||
|
|
END(_mcount)
|
||
|
|
|
||
|
|
/* The canonical name for the function is `_mcount' in both C and asm,
|
||
|
|
but some old asm code might assume it's `mcount'. */
|
||
|
|
#undef mcount
|
||
|
|
weak_alias (_mcount, mcount)
|