mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
Move ARM EABI mcount into a separate .S file.
This commit is contained in:
Thomas Schwinge
Joseph Myers
parent
8ef2c3b0f7
commit
2423dc241a
@ -1,3 +1,12 @@
|
||||
2009-12-16 Thomas Schwinge <thomas@codesourcery.com>
|
||||
|
||||
* sysdeps/arm/eabi/Makefile [gmon] (sysdep_routines): Add arm-mcount.
|
||||
* sysdeps/arm/eabi/machine-gmon.h (mcount_internal): Define to
|
||||
`__mcount_internal'.
|
||||
(MCOUNT (__gnu_mcount_nc), OLD_MCOUNT (_mcount), mcount): Move to...
|
||||
* sysdeps/arm/eabi/arm-mcount.S: ... this new file as __gnu_mcount_nc,
|
||||
_mcount, and mcount, respectively.
|
||||
|
||||
2009-12-15 Joseph Myers <joseph@codesourcery.com>
|
||||
|
||||
* sysdeps/unix/sysv/linux/arm/bits/fcntl.h: Redefine O_SYNC and
|
||||
|
||||
@ -12,6 +12,10 @@ static-only-routines += $(aeabi_constants)
|
||||
gen-as-const-headers += rtld-global-offsets.sym
|
||||
endif
|
||||
|
||||
ifeq ($(subdir),gmon)
|
||||
sysdep_routines += arm-mcount
|
||||
endif
|
||||
|
||||
ifeq ($(subdir),debug)
|
||||
CFLAGS-backtrace.c += -funwind-tables
|
||||
endif
|
||||
|
||||
83
sysdeps/arm/eabi/arm-mcount.S
Normal file
83
sysdeps/arm/eabi/arm-mcount.S
Normal file
@ -0,0 +1,83 @@
|
||||
/* 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)
|
||||
@ -1,5 +1,5 @@
|
||||
/* Machine-dependent definitions for profiling support. ARM EABI version.
|
||||
Copyright (C) 2008 Free Software Foundation, Inc.
|
||||
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
|
||||
@ -17,83 +17,18 @@
|
||||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||||
02111-1307 USA. */
|
||||
|
||||
#include <sysdep.h>
|
||||
|
||||
/* 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__;
|
||||
/* We must not pollute the global namespace. */
|
||||
#define mcount_internal __mcount_internal
|
||||
|
||||
extern void mcount_internal (u_long frompc, u_long selfpc) internal_function;
|
||||
#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>
|
||||
*/
|
||||
void internal_function mcount_internal (u_long frompc, u_long selfpc)
|
||||
|
||||
|
||||
#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
|
||||
/* Define MCOUNT as empty since we have the implementation in another file. */
|
||||
#define MCOUNT
|
||||
|
||||
Loading…
Reference in New Issue
Block a user