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https://sourceware.org/git/glibc.git
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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.
This commit is contained in:
Roland McGrath
parent
4b172769b2
commit
65233b5850
@ -1,3 +1,11 @@
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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
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defined in entry.h.
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(__gmon_start__) [!ENTRY_POINT_DECL]: Use TEXT_START macro to obtain
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lowest address for profiling in __monstartup call.
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* sysdeps/powerpc/powerpc64/elf/entry.h: New file.
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2002-09-14 Roland McGrath <roland@redhat.com>
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* sysdeps/unix/sysv/linux/pread.c: __NR_pread64 may be defined
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@ -35,6 +35,14 @@ extern void ENTRY_POINT;
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#endif
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extern void etext;
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#ifndef TEXT_START
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#ifdef ENTRY_POINT_DECL
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#define TEXT_START ENTRY_POINT
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#else
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#define TEXT_START &ENTRY_POINT
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#endif
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#endif
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#ifndef HAVE_INITFINI
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/* This function gets called at startup by the normal constructor
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mechanism. We link this file together with start.o to produce gcrt1.o,
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@ -66,7 +74,7 @@ __gmon_start__ (void)
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#ifdef ENTRY_POINT_DECL
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__monstartup ((u_long) ENTRY_POINT, (u_long) &etext);
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#else
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__monstartup ((u_long) &ENTRY_POINT, (u_long) &etext);
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__monstartup ((u_long) TEXT_START, (u_long) &etext);
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#endif
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/* Call _mcleanup before exiting; it will write out gmon.out from the
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129
linuxthreads/sysdeps/powerpc/powerpc64/pt-machine.h
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129
linuxthreads/sysdeps/powerpc/powerpc64/pt-machine.h
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@ -0,0 +1,129 @@
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/* Machine-dependent pthreads configuration and inline functions.
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powerpc version.
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Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* These routines are from Appendix G of the 'PowerPC 601 RISC Microprocessor
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User's Manual', by IBM and Motorola. */
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#ifndef _PT_MACHINE_H
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#define _PT_MACHINE_H 1
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#ifndef PT_EI
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# define PT_EI extern inline
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#endif
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extern long int testandset (int *spinlock);
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extern int __compare_and_swap (long int *p, long int oldval, long int newval);
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/* For multiprocessor systems, we want to ensure all memory accesses
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are completed before we reset a lock. On other systems, we still
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need to make sure that the compiler has flushed everything to memory. */
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#define MEMORY_BARRIER() __asm__ __volatile__ ("sync" : : : "memory")
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/* We want the OS to assign stack addresses. */
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#define FLOATING_STACKS 1
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/* Maximum size of the stack if the rlimit is unlimited. */
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#define ARCH_STACK_MAX_SIZE 16*1024*1024
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/* Get some notion of the current stack. Need not be exactly the top
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of the stack, just something somewhere in the current frame. */
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#define CURRENT_STACK_FRAME stack_pointer
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register char * stack_pointer __asm__ ("r1");
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/* Register r13 (tp) is reserved by the ABI as "thread pointer". */
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struct _pthread_descr_struct;
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register struct _pthread_descr_struct *__thread_self __asm__("r13");
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/* Return the thread descriptor for the current thread. */
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#define THREAD_SELF __thread_self
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/* Initialize the thread-unique value. */
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#define INIT_THREAD_SELF(descr, nr) (__thread_self = (descr))
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/* Compare-and-swap for semaphores. */
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/* note that test-and-set(x) is the same as !compare-and-swap(x, 0, 1) */
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#define HAS_COMPARE_AND_SWAP
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#define HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS
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PT_EI int
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__compare_and_swap (long int *p, long int oldval, long int newval)
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{
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long int ret;
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__asm__ __volatile__ (
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"0: ldarx %0,0,%1 ;"
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" xor. %0,%3,%0;"
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" bne 1f;"
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" stdcx. %2,0,%1;"
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" bne- 0b;"
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"1: "
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: "=&r"(ret)
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: "r"(p), "r"(newval), "r"(oldval)
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: "cr0", "memory");
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/* This version of __compare_and_swap is to be used when acquiring
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a lock, so we don't need to worry about whether other memory
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operations have completed, but we do need to be sure that any loads
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after this point really occur after we have acquired the lock. */
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__asm__ __volatile__ ("isync" : : : "memory");
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return (int)(ret == 0);
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}
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PT_EI int
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__compare_and_swap_with_release_semantics (long int *p,
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long int oldval, long int newval)
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{
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long int ret;
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MEMORY_BARRIER ();
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__asm__ __volatile__ (
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"0: ldarx %0,0,%1 ;"
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" xor. %0,%3,%0;"
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" bne 1f;"
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" stdcx. %2,0,%1;"
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" bne- 0b;"
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"1: "
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: "=&r"(ret)
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: "r"(p), "r"(newval), "r"(oldval)
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: "cr0", "memory");
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return (int)(ret == 0);
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}
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PT_EI long int
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testandset (int *p)
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{
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long int ret, val = 1;
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MEMORY_BARRIER ();
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__asm__ __volatile__ (
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"0: lwarx %0,0,%1 ;"
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" cmpwi 0,%0,0;"
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" bne 1f;"
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" stwcx. %2,0,%1;"
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" bne- 0b;"
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"1: "
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: "=&r"(ret)
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: "r"(p), "r" (val)
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: "cr0", "memory");
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MEMORY_BARRIER ();
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return ret != 0;
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}
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#endif /* pt-machine.h */
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34
sysdeps/powerpc/powerpc64/elf/entry.h
Normal file
34
sysdeps/powerpc/powerpc64/elf/entry.h
Normal file
@ -0,0 +1,34 @@
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/* Finding the entry point and start of text. PowerPC64 version.
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Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef __ASSEMBLY__
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extern void _start (void);
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#endif
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#define ENTRY_POINT _start
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/* We have to provide a special declaration. */
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#define ENTRY_POINT_DECL(class) class void _start (void);
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/* Use the address of ._start as the lowest address for which we need
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to keep profiling records. We can't copy the ia64 scheme as our
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entry poiny address is really the address of the function
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descriptor, not the actual function entry. */
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#define TEXT_START (((long int *) ENTRY_POINT)[0])
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