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authorRichard Henderson <rth@redhat.com>2004-03-11 21:34:25 +0000
committerRichard Henderson <rth@redhat.com>2004-03-11 21:34:25 +0000
commit9852f6dcfff04f9ab05ab1d19845108b5a4783ab (patch)
tree5d790acca723760864742bf872ba2012a0e8af47
parent43513fb738808dc2ab14b17aaf5be05d103340d4 (diff)
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* sysdeps/alpha/tcb-offsets.sym (PID_OFFSET): New. * sysdeps/unix/sysv/linux/alpha/pt-vfork.S: Save/restore PID. * sysdeps/unix/sysv/linux/alpha/vfork.S: New file.
2004-03-11 Richard Henderson <rth@redhat.com> * sysdeps/alpha/tcb-offsets.sym (PID_OFFSET): New. * sysdeps/unix/sysv/linux/alpha/pt-vfork.S: Save/restore PID. * sysdeps/unix/sysv/linux/alpha/vfork.S: New file.
-rw-r--r--nptl/ChangeLog6
-rw-r--r--nptl/sysdeps/alpha/tcb-offsets.sym1
-rw-r--r--nptl/sysdeps/unix/sysv/linux/alpha/pt-vfork.S26
-rw-r--r--nptl/sysdeps/unix/sysv/linux/alpha/vfork.S46
4 files changed, 75 insertions, 4 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index 73363856e9..76af9036af 100644
--- a/nptl/ChangeLog
+++ b/nptl/ChangeLog
@@ -1,3 +1,9 @@
+2004-03-11 Richard Henderson <rth@redhat.com>
+
+ * sysdeps/alpha/tcb-offsets.sym (PID_OFFSET): New.
+ * sysdeps/unix/sysv/linux/alpha/pt-vfork.S: Save/restore PID.
+ * sysdeps/unix/sysv/linux/alpha/vfork.S: New file.
+
2004-03-11 Jakub Jelinek <jakub@redhat.com>
* sysdeps/unix/sysv/linux/s390/s390-64/vfork.S (__vfork): Use jgnl
diff --git a/nptl/sysdeps/alpha/tcb-offsets.sym b/nptl/sysdeps/alpha/tcb-offsets.sym
index 3f6433d5e9..a1a1e45951 100644
--- a/nptl/sysdeps/alpha/tcb-offsets.sym
+++ b/nptl/sysdeps/alpha/tcb-offsets.sym
@@ -10,3 +10,4 @@
#if TLS_MULTIPLE_THREADS_IN_TCB
MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads)
#endif
+PID_OFFSET thread_offsetof (pid)
diff --git a/nptl/sysdeps/unix/sysv/linux/alpha/pt-vfork.S b/nptl/sysdeps/unix/sysv/linux/alpha/pt-vfork.S
index 4a2df4255b..ec5d175bec 100644
--- a/nptl/sysdeps/unix/sysv/linux/alpha/pt-vfork.S
+++ b/nptl/sysdeps/unix/sysv/linux/alpha/pt-vfork.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 2004 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
@@ -16,10 +16,28 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
-#include <sysdep-cancel.h>
+#include <sysdep.h>
+#include <tcb-offsets.h>
+
+#undef PSEUDO_PREPARE_ARGS
+#define PSEUDO_PREPARE_ARGS \
+ /* Load the current cached pid value across the vfork. */ \
+ rduniq; \
+ ldl a2, PID_OFFSET(v0); \
+ mov v0, a1; \
+ /* Write back its negation, to indicate that the pid value is \
+ uninitialized in the the child, and in the window between \
+ here and the point at which we restore the value. */ \
+ negl a2, t0; \
+ stl t0, PID_OFFSET(v0);
+
+PSEUDO (__vfork, vfork, 0)
+
+ /* If we're back in the parent, restore the saved pid. */
+ beq v0, 1f
+ stl a2, PID_OFFSET(a1)
+1: ret
-PSEUDO(__vfork, vfork, 0)
- ret
PSEUDO_END (__vfork)
weak_alias (__vfork, vfork)
diff --git a/nptl/sysdeps/unix/sysv/linux/alpha/vfork.S b/nptl/sysdeps/unix/sysv/linux/alpha/vfork.S
new file mode 100644
index 0000000000..8bdf0eb9c8
--- /dev/null
+++ b/nptl/sysdeps/unix/sysv/linux/alpha/vfork.S
@@ -0,0 +1,46 @@
+/* Copyright (C) 2004 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. */
+
+#include <sysdep.h>
+#include <tcb-offsets.h>
+
+#undef PSEUDO_PREPARE_ARGS
+#define PSEUDO_PREPARE_ARGS \
+ /* Load the current cached pid value across the vfork. */ \
+ rduniq; \
+ ldl a2, PID_OFFSET(v0); \
+ mov v0, a1; \
+ /* If the cached value is initialized (nonzero), then write \
+ back its negation, or INT_MIN, to indicate that the pid \
+ value is uninitialized in the the child, and in the window \
+ between here and the point at which we restore the value. */ \
+ ldah t0, -0x8000; \
+ negl a2, t1; \
+ cmovne a2, t1, t0; \
+ stl t0, PID_OFFSET(v0);
+
+PSEUDO (__vfork, vfork, 0)
+
+ /* If we're back in the parent, restore the saved pid. */
+ beq v0, 1f
+ stl a2, PID_OFFSET(a1)
+1: ret
+
+PSEUDO_END (__vfork)
+
+weak_alias (__vfork, vfork)