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authorRoland McGrath <roland@gnu.org>2002-09-14 08:55:27 +0000
committerRoland McGrath <roland@gnu.org>2002-09-14 08:55:27 +0000
commit65233b5850accaaf3339e050c69f59b994582e86 (patch)
tree09b02fe94b43779487d76db94e6d891eda4cb567
parent4b172769b29087fbf9989494e7d09b8c4347208e (diff)
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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.
-rw-r--r--ChangeLog8
-rw-r--r--csu/gmon-start.c10
-rw-r--r--linuxthreads/sysdeps/powerpc/powerpc64/pt-machine.h129
-rw-r--r--sysdeps/powerpc/powerpc64/elf/entry.h34
4 files changed, 180 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index d126ea3eda..39fa57bf73 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -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>
* sysdeps/unix/sysv/linux/pread.c: __NR_pread64 may be defined
diff --git a/csu/gmon-start.c b/csu/gmon-start.c
index 9ee722aa0f..88160648f8 100644
--- a/csu/gmon-start.c
+++ b/csu/gmon-start.c
@@ -35,6 +35,14 @@ extern void ENTRY_POINT;
#endif
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
/* This function gets called at startup by the normal constructor
mechanism. We link this file together with start.o to produce gcrt1.o,
@@ -66,7 +74,7 @@ __gmon_start__ (void)
#ifdef ENTRY_POINT_DECL
__monstartup ((u_long) ENTRY_POINT, (u_long) &etext);
#else
- __monstartup ((u_long) &ENTRY_POINT, (u_long) &etext);
+ __monstartup ((u_long) TEXT_START, (u_long) &etext);
#endif
/* Call _mcleanup before exiting; it will write out gmon.out from the
diff --git a/linuxthreads/sysdeps/powerpc/powerpc64/pt-machine.h b/linuxthreads/sysdeps/powerpc/powerpc64/pt-machine.h
new file mode 100644
index 0000000000..a3dc26fe21
--- /dev/null
+++ b/linuxthreads/sysdeps/powerpc/powerpc64/pt-machine.h
@@ -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 */
diff --git a/sysdeps/powerpc/powerpc64/elf/entry.h b/sysdeps/powerpc/powerpc64/elf/entry.h
new file mode 100644
index 0000000000..f9a7669fc2
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/elf/entry.h
@@ -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])