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authorUlrich Drepper <drepper@redhat.com>2004-03-09 06:32:58 +0000
committerUlrich Drepper <drepper@redhat.com>2004-03-09 06:32:58 +0000
commit6fadea9f1d26e09e7da4c4c6ae2ba976fef73c25 (patch)
tree2be99959b9b5340df51d5c2f220fb436621e9f4d /nptl
parentc072ef6d229b1c504e0cff58371df892ec289dec (diff)
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Update.
* sysdeps/unix/sysv/linux/i386/vfork.S: If SAVE_PID and RESTORE_PID are defined, use it. * sysdeps/unix/sysv/linux/x86_64/vfork.S: Likewise.
Diffstat (limited to 'nptl')
-rw-r--r--nptl/ChangeLog2
-rw-r--r--nptl/sysdeps/i386/tcb-offsets.sym1
-rw-r--r--nptl/sysdeps/unix/sysv/linux/i386/vfork.S73
-rw-r--r--nptl/sysdeps/unix/sysv/linux/x86_64/vfork.S31
-rw-r--r--nptl/sysdeps/x86_64/tcb-offsets.sym1
5 files changed, 45 insertions, 63 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index 4d44b67..7933491 100644
--- a/nptl/ChangeLog
+++ b/nptl/ChangeLog
@@ -1,7 +1,9 @@
2004-03-08 Ulrich Drepper <drepper@redhat.com>
* sysdeps/i386/tcb-offsets.sym: Add PID.
+ * sysdeps/x86_64/tcb-offsets.sym: Likewise.
* sysdeps/unix/sysv/linux/i386/vfork.S: New file.
+ * sysdeps/unix/sysv/linux/x86_64/vfork.S: New file.
2004-03-08 Steven Munroe <sjmunroe@us.ibm.com>
diff --git a/nptl/sysdeps/i386/tcb-offsets.sym b/nptl/sysdeps/i386/tcb-offsets.sym
index a83c3c9..4e0444b 100644
--- a/nptl/sysdeps/i386/tcb-offsets.sym
+++ b/nptl/sysdeps/i386/tcb-offsets.sym
@@ -3,6 +3,7 @@
RESULT offsetof (struct pthread, result)
TID offsetof (struct pthread, tid)
+PID offsetof (struct pthread, pid)
CANCELHANDLING offsetof (struct pthread, cancelhandling)
CLEANUP_JMP_BUF offsetof (struct pthread, cleanup_jmp_buf)
MULTIPLE_THREADS_OFFSET offsetof (tcbhead_t, multiple_threads)
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/vfork.S b/nptl/sysdeps/unix/sysv/linux/i386/vfork.S
index 7874534..2b60a5e 100644
--- a/nptl/sysdeps/unix/sysv/linux/i386/vfork.S
+++ b/nptl/sysdeps/unix/sysv/linux/i386/vfork.S
@@ -1,6 +1,5 @@
/* Copyright (C) 1999, 2002, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
- Contributed by Andreas Schwab <schwab@gnu.org>.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
@@ -17,71 +16,19 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
-#include <sysdep.h>
-#define _ERRNO_H 1
-#include <bits/errno.h>
-#include <kernel-features.h>
#include <tcb-offsets.h>
-/* Clone the calling process, but without copying the whole address space.
- The calling process is suspended until the new process exits or is
- replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
- and the process ID of the new process to the old process. */
-
-ENTRY (__vfork)
-
-#ifdef __NR_vfork
-
- /* Pop the return PC value into ECX. */
- popl %ecx
-
- /* Save the PID value. */
- movl %gs:PID, %edx
+/* Save the PID value. */
+#define SAVE_PID \
+ movl %gs:PID, %edx; \
movl $-1, %gs:PID
- /* Stuff the syscall number in EAX and enter into the kernel. */
- movl $SYS_ify (vfork), %eax
- int $0x80
-
- /* Jump to the return PC. Don't jump directly since this
- disturbs the branch target cache. Instead push the return
- address back on the stack. */
- pushl %ecx
-
- /* Restore the old PID value in the parent. In the child store 0. */
- testl %eax, %eax
- je 1f
- movl %edx, %gs:PID
-
-1: cmpl $-4095, %eax
- /* Branch forward if it failed. */
-# ifdef __ASSUME_VFORK_SYSCALL
- jae SYSCALL_ERROR_LABEL
-.Lpseudo_end:
-# else
- jae .Lerror
-# endif
- ret
-
-# ifndef __ASSUME_VFORK_SYSCALL
-.Lerror:
- /* Check if vfork syscall is known at all. */
- cmpl $-ENOSYS, %eax
- jne SYSCALL_ERROR_LABEL
-# endif
-#endif
-
-#ifndef __ASSUME_VFORK_SYSCALL
- /* If we don't have vfork, fork is close enough. */
+/* Restore the old PID value in the parent. In the child store 0. */
+#define RESTORE_PID \
+ testl %eax, %eax; \
+ je 1f; \
+ movl %edx, %gs:PID; \
+1:
- movl $SYS_ify (fork), %eax
- int $0x80
- cmpl $-4095, %eax
- jae SYSCALL_ERROR_LABEL
-.Lpseudo_end:
- ret
-#endif
-PSEUDO_END (__vfork)
-libc_hidden_def (__vfork)
-weak_alias (__vfork, vfork)
+#include <sysdeps/unix/sysv/linux/i386/vfork.S>
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/vfork.S b/nptl/sysdeps/unix/sysv/linux/x86_64/vfork.S
new file mode 100644
index 0000000..9e34868
--- /dev/null
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/vfork.S
@@ -0,0 +1,31 @@
+/* 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 <tcb-offsets.h>
+
+#define SAVE_PID \
+ movl %fs:PID, %esi; \
+ movl $-1, %fs:PID
+
+#define RESTORE_PID \
+ testq %rax, %rax; \
+ je 1f; \
+ movl %esi, %fs:PID; \
+1:
+
+#include <sysdeps/unix/sysv/linux/x86_64/vfork.S>
diff --git a/nptl/sysdeps/x86_64/tcb-offsets.sym b/nptl/sysdeps/x86_64/tcb-offsets.sym
index f91dd39..8118d2d 100644
--- a/nptl/sysdeps/x86_64/tcb-offsets.sym
+++ b/nptl/sysdeps/x86_64/tcb-offsets.sym
@@ -3,6 +3,7 @@
RESULT offsetof (struct pthread, result)
TID offsetof (struct pthread, tid)
+PID offsetof (struct pthread, pid)
CANCELHANDLING offsetof (struct pthread, cancelhandling)
CLEANUP_JMP_BUF offsetof (struct pthread, cleanup_jmp_buf)
CLEANUP offsetof (struct pthread, cleanup)