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2002-09-10 Alan Modra <amodra@bigpond.net.au>

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* csu/gmon-start.c [!TEXT_START]: Define TEXT_START if not already
	defined in entry.h.
	(__gmon_start__) [!ENTRY_POINT_DECL]: Use TEXT_START macro to obtain
	lowest address for profiling in  __monstartup call.
	* sysdeps/powerpc/powerpc64/elf/entry.h: New file.
This commit is contained in:
Roland McGrath 2002-09-14 08:55:27 +00:00
parent 4b172769b2
commit 65233b5850
4 changed files with 180 additions and 1 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2002-09-10 Alan Modra <amodra@bigpond.net.au>
* csu/gmon-start.c [!TEXT_START]: Define TEXT_START if not already
defined in entry.h.
(__gmon_start__) [!ENTRY_POINT_DECL]: Use TEXT_START macro to obtain
lowest address for profiling in __monstartup call.
* sysdeps/powerpc/powerpc64/elf/entry.h: New file.
2002-09-14 Roland McGrath <roland@redhat.com> 2002-09-14 Roland McGrath <roland@redhat.com>
* sysdeps/unix/sysv/linux/pread.c: __NR_pread64 may be defined * sysdeps/unix/sysv/linux/pread.c: __NR_pread64 may be defined

10
csu/gmon-start.c
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@ -35,6 +35,14 @@ extern void ENTRY_POINT;
#endif #endif
extern void etext; extern void etext;
#ifndef TEXT_START
#ifdef ENTRY_POINT_DECL
#define TEXT_START ENTRY_POINT
#else
#define TEXT_START &ENTRY_POINT
#endif
#endif
#ifndef HAVE_INITFINI #ifndef HAVE_INITFINI
/* This function gets called at startup by the normal constructor /* This function gets called at startup by the normal constructor
mechanism. We link this file together with start.o to produce gcrt1.o, mechanism. We link this file together with start.o to produce gcrt1.o,
@ -66,7 +74,7 @@ __gmon_start__ (void)
#ifdef ENTRY_POINT_DECL #ifdef ENTRY_POINT_DECL
__monstartup ((u_long) ENTRY_POINT, (u_long) &etext); __monstartup ((u_long) ENTRY_POINT, (u_long) &etext);
#else #else
__monstartup ((u_long) &ENTRY_POINT, (u_long) &etext); __monstartup ((u_long) TEXT_START, (u_long) &etext);
#endif #endif
/* Call _mcleanup before exiting; it will write out gmon.out from the /* Call _mcleanup before exiting; it will write out gmon.out from the

129
linuxthreads/sysdeps/powerpc/powerpc64/pt-machine.h Normal file
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@ -0,0 +1,129 @@
/* Machine-dependent pthreads configuration and inline functions.
powerpc version.
Copyright (C) 2002 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* These routines are from Appendix G of the 'PowerPC 601 RISC Microprocessor
User's Manual', by IBM and Motorola. */
#ifndef _PT_MACHINE_H
#define _PT_MACHINE_H 1
#ifndef PT_EI
# define PT_EI extern inline
#endif
extern long int testandset (int *spinlock);
extern int __compare_and_swap (long int *p, long int oldval, long int newval);
/* For multiprocessor systems, we want to ensure all memory accesses
are completed before we reset a lock. On other systems, we still
need to make sure that the compiler has flushed everything to memory. */
#define MEMORY_BARRIER() __asm__ __volatile__ ("sync" : : : "memory")
/* We want the OS to assign stack addresses. */
#define FLOATING_STACKS 1
/* Maximum size of the stack if the rlimit is unlimited. */
#define ARCH_STACK_MAX_SIZE 16*1024*1024
/* Get some notion of the current stack. Need not be exactly the top
of the stack, just something somewhere in the current frame. */
#define CURRENT_STACK_FRAME stack_pointer
register char * stack_pointer __asm__ ("r1");
/* Register r13 (tp) is reserved by the ABI as "thread pointer". */
struct _pthread_descr_struct;
register struct _pthread_descr_struct *__thread_self __asm__("r13");
/* Return the thread descriptor for the current thread. */
#define THREAD_SELF __thread_self
/* Initialize the thread-unique value. */
#define INIT_THREAD_SELF(descr, nr) (__thread_self = (descr))
/* Compare-and-swap for semaphores. */
/* note that test-and-set(x) is the same as !compare-and-swap(x, 0, 1) */
#define HAS_COMPARE_AND_SWAP
#define HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS
PT_EI int
__compare_and_swap (long int *p, long int oldval, long int newval)
{
long int ret;
__asm__ __volatile__ (
"0: ldarx %0,0,%1 ;"
" xor. %0,%3,%0;"
" bne 1f;"
" stdcx. %2,0,%1;"
" bne- 0b;"
"1: "
: "=&r"(ret)
: "r"(p), "r"(newval), "r"(oldval)
: "cr0", "memory");
/* This version of __compare_and_swap is to be used when acquiring
a lock, so we don't need to worry about whether other memory
operations have completed, but we do need to be sure that any loads
after this point really occur after we have acquired the lock. */
__asm__ __volatile__ ("isync" : : : "memory");
return (int)(ret == 0);
}
PT_EI int
__compare_and_swap_with_release_semantics (long int *p,
long int oldval, long int newval)
{
long int ret;
MEMORY_BARRIER ();
__asm__ __volatile__ (
"0: ldarx %0,0,%1 ;"
" xor. %0,%3,%0;"
" bne 1f;"
" stdcx. %2,0,%1;"
" bne- 0b;"
"1: "
: "=&r"(ret)
: "r"(p), "r"(newval), "r"(oldval)
: "cr0", "memory");
return (int)(ret == 0);
}
PT_EI long int
testandset (int *p)
{
long int ret, val = 1;
MEMORY_BARRIER ();
__asm__ __volatile__ (
"0: lwarx %0,0,%1 ;"
" cmpwi 0,%0,0;"
" bne 1f;"
" stwcx. %2,0,%1;"
" bne- 0b;"
"1: "
: "=&r"(ret)
: "r"(p), "r" (val)
: "cr0", "memory");
MEMORY_BARRIER ();
return ret != 0;
}
#endif /* pt-machine.h */

34
sysdeps/powerpc/powerpc64/elf/entry.h Normal file
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@ -0,0 +1,34 @@
/* Finding the entry point and start of text. PowerPC64 version.
Copyright (C) 2002 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. */
#ifndef __ASSEMBLY__
extern void _start (void);
#endif
#define ENTRY_POINT _start
/* We have to provide a special declaration. */
#define ENTRY_POINT_DECL(class) class void _start (void);
/* Use the address of ._start as the lowest address for which we need
to keep profiling records. We can't copy the ia64 scheme as our
entry poiny address is really the address of the function
descriptor, not the actual function entry. */
#define TEXT_START (((long int *) ENTRY_POINT)[0])