From 6fadea9f1d26e09e7da4c4c6ae2ba976fef73c25 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Tue, 9 Mar 2004 06:32:58 +0000 Subject: 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. --- nptl/sysdeps/i386/tcb-offsets.sym | 1 + nptl/sysdeps/unix/sysv/linux/i386/vfork.S | 73 ++++------------------------- nptl/sysdeps/unix/sysv/linux/x86_64/vfork.S | 31 ++++++++++++ nptl/sysdeps/x86_64/tcb-offsets.sym | 1 + 4 files changed, 43 insertions(+), 63 deletions(-) create mode 100644 nptl/sysdeps/unix/sysv/linux/x86_64/vfork.S (limited to 'nptl/sysdeps') diff --git a/nptl/sysdeps/i386/tcb-offsets.sym b/nptl/sysdeps/i386/tcb-offsets.sym index a83c3c9a9b..4e0444ba38 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 787453427b..2b60a5ea5e 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 . 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 -#define _ERRNO_H 1 -#include -#include #include -/* 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 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 0000000000..9e348683f3 --- /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 + +#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 diff --git a/nptl/sysdeps/x86_64/tcb-offsets.sym b/nptl/sysdeps/x86_64/tcb-offsets.sym index f91dd39703..8118d2df8b 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) -- cgit v1.2.3