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| author | Ulrich Drepper <drepper@gmail.com> | 2011-09-06 23:17:53 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-09-06 23:17:53 -0400 |
| commit | a0e1f41bd487d2202b6c1e0802c0e6c91630fbea (patch) | |
| tree | 67aec34b0c299450ff5e1190d8b0c524a9b7aa5e | |
| parent | ceaa0c5dc3f86d3d3126abdd592a3c4fdc457255 (diff) | |
| download | glibc-a0e1f41bd487d2202b6c1e0802c0e6c91630fbea.tar.gz glibc-a0e1f41bd487d2202b6c1e0802c0e6c91630fbea.tar.xz glibc-a0e1f41bd487d2202b6c1e0802c0e6c91630fbea.zip | |
Don't call gettimeofday vsyscall in x86-64 sem_timedwait
| -rw-r--r-- | nptl/ChangeLog | 5 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S | 13 |
2 files changed, 10 insertions, 8 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog index caae5dcf3c..9d066c600d 100644 --- a/nptl/ChangeLog +++ b/nptl/ChangeLog @@ -1,3 +1,8 @@ +2011-09-06 Ulrich Drepper <drepper@gmail.com> + + * sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S (sem_timedwait): Don't + use gettimeofday vsyscall, just call gettimeofday. + 2011-09-05 David S. Miller <davem@davemloft.net> * sysdeps/unix/sysv/linux/sem_timedwait.c (do_futex_timed_wait): diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S index ca49cb89d0..2926b36e7b 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002,2003,2005,2007,2009,2010 Free Software Foundation, Inc. +/* Copyright (C) 2002,2003,2005,2007,2009,2010,2011 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -24,10 +24,6 @@ #include <pthread-errnos.h> #include <structsem.h> - -/* For the calculation see asm/vsyscall.h. */ -#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000 - .text .globl sem_timedwait @@ -212,9 +208,10 @@ sem_timedwait: addq $1, NWAITERS(%r12) 7: xorl %esi, %esi - movq %rsp, %rdi - movq $VSYSCALL_ADDR_vgettimeofday, %rax - callq *%rax + movq %rsp,%rdi + /* This call works because we directly jump to a system call entry + which preserves all the registers. */ + call JUMPTARGET(__gettimeofday) /* Compute relative timeout. */ movq 8(%rsp), %rax |