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2008-04-11 Paul Brook <paul@codesourcery.com> 

Sandra Loosemore  <sandra@codesourcery.com>

	* sysdeps/arm/eabi/machine-gmon.h: New file.
	* sysdeps/arm/eabi/Versions: Add __gnu_mcount_nc.
This commit is contained in:
Daniel Jacobowitz 2008-04-11 14:21:43 +00:00
parent f6fe80ef8d
commit 5f1d477bb4
3 changed files with 108 additions and 0 deletions
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6
ChangeLog.arm
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@ -1,3 +1,9 @@
2008-04-11 Paul Brook <paul@codesourcery.com>
Sandra Loosemore <sandra@codesourcery.com>
* sysdeps/arm/eabi/machine-gmon.h: New file.
* sysdeps/arm/eabi/Versions: Add __gnu_mcount_nc.
2007-12-21 Daniel Jacobowitz <dan@codesourcery.com>
* sysdeps/unix/sysv/linux/arm/profil-counter.h: Use the i386 version.

3
sysdeps/arm/eabi/Versions
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@ -14,4 +14,7 @@ libc {
# Helper routines
__gnu_Unwind_Find_exidx;
}
GLIBC_2.8 {
__gnu_mcount_nc;
}
}

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sysdeps/arm/eabi/machine-gmon.h Normal file
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/* Machine-dependent definitions for profiling support. ARM EABI version.
Copyright (C) 2008 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. */
/* GCC for the ARM cannot compile __builtin_return_address(N) for N != 0,
so we must use an assembly stub. */
#include <sysdep.h>
static void mcount_internal (u_long frompc, u_long selfpc) __attribute_used__;
#define _MCOUNT_DECL(frompc, selfpc) \
static void mcount_internal (u_long frompc, u_long selfpc)
/* 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>
*/
#define MCOUNT \
void __attribute__((__naked__)) __gnu_mcount_nc(void) \
{ \
asm ("push {r0, r1, r2, r3, lr}\n\t" \
"bic r1, lr, #1\n\t" \
"ldr r0, [sp, #20]\n\t" \
"bl mcount_internal\n\t" \
"pop {r0, r1, r2, r3, ip, lr}\n\t" \
"bx ip"); \
} \
OLD_MCOUNT
/* Provide old mcount for backwards compatibility. This requires
code be compiled with APCS frame pointers. */
#ifndef NO_UNDERSCORES
/* The asm symbols for C functions are `_function'.
The canonical name for the counter function is `mcount', no _. */
void _mcount (void) asm ("mcount");
#else
/* The canonical name for the function is `_mcount' in both C and asm,
but some old asm code might assume it's `mcount'. */
void _mcount (void);
weak_alias (_mcount, mcount)
#endif
#ifdef __thumb2__
#define OLD_MCOUNT \
void __attribute__((__naked__)) _mcount (void) \
{ \
__asm__("push {r0, r1, r2, r3, fp, lr};" \
"movs r0, fp;" \
"ittt ne;" \
"ldrne r0, [r0, #-4];" \
"movsne r1, lr;" \
"blne mcount_internal;" \
"pop {r0, r1, r2, r3, fp, pc}"); \
}
#else
#define OLD_MCOUNT \
void __attribute__((__naked__)) _mcount (void) \
{ \
__asm__("stmdb sp!, {r0, r1, r2, r3, fp, lr};" \
"movs fp, fp;" \
"ldrne r0, [fp, #-4];" \
"movnes r1, lr;" \
"blne mcount_internal;" \
"ldmia sp!, {r0, r1, r2, r3, fp, lr};" \
"bx lr"); \
}
#endif