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| author | Ulrich Drepper <drepper@gmail.com> | 2011-09-07 00:14:06 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-09-07 00:14:06 -0400 |
| commit | 9e5c9dcd57e80cd56c47fd2bf11de8d167176a0e (patch) | |
| tree | cc1249b28b4a809ce87d788c0ea23e6b5b8b5475 /nptl | |
| parent | e38ba7ab6a56d53bde4fcff250f6928fb473bc3c (diff) | |
| download | glibc-9e5c9dcd57e80cd56c47fd2bf11de8d167176a0e.tar.gz glibc-9e5c9dcd57e80cd56c47fd2bf11de8d167176a0e.tar.xz glibc-9e5c9dcd57e80cd56c47fd2bf11de8d167176a0e.zip | |
Remove gettimeofday vsyscall use from x86-86 libpthread
Diffstat (limited to 'nptl')
6 files changed, 37 insertions, 45 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog index 9d066c600d..1f4cfd0bb5 100644 --- a/nptl/ChangeLog +++ b/nptl/ChangeLog @@ -2,6 +2,14 @@ * sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S (sem_timedwait): Don't use gettimeofday vsyscall, just call gettimeofday. + * sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: Likewise. + * sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S: Likewise. + * sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S: + Likewise. + * sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S: + Likewise. + * sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S: Likewise. + Simplify __vdso_clock_gettime use. 2011-09-05 David S. Miller <davem@davemloft.net> diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S index 3195db259f..018da0cc59 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002-2006, 2007, 2009, 2010 Free Software Foundation, Inc. +/* Copyright (C) 2002-2007, 2009, 2010, 2011 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -68,10 +68,6 @@ #endif -/* For the calculation see asm/vsyscall.h. */ -#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000 - - .globl __lll_lock_wait_private .type __lll_lock_wait_private,@function .hidden __lll_lock_wait_private @@ -250,10 +246,9 @@ __lll_timedlock_wait: /* Get current time. */ movq %rsp, %rdi xorl %esi, %esi - movq $VSYSCALL_ADDR_vgettimeofday, %rax - /* This is a regular function call, all caller-save registers - might be clobbered. */ - callq *%rax + /* 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 @@ -402,8 +397,9 @@ __lll_timedwait_tid: /* Get current time. */ 2: movq %rsp, %rdi xorl %esi, %esi - movq $VSYSCALL_ADDR_vgettimeofday, %rax - callq *%rax + /* 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 diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S index 5218a4f57a..b7b8b34985 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002=2007, 2009, 2010 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2011=2007, 2009, 2010 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -50,9 +50,6 @@ orl $FUTEX_WAIT_BITSET | FUTEX_CLOCK_REALTIME, reg #endif -/* For the calculation see asm/vsyscall.h. */ -#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000 - .globl __lll_robust_lock_wait .type __lll_robust_lock_wait,@function @@ -219,10 +216,9 @@ __lll_robust_timedlock_wait: /* Get current time. */ movq %rsp, %rdi xorl %esi, %esi - movq $VSYSCALL_ADDR_vgettimeofday, %rax - /* This is a regular function call, all caller-save registers - might be clobbered. */ - callq *%rax + /* 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 diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S index 48ea8b967e..d11b29746a 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S @@ -26,9 +26,6 @@ #include <kernel-features.h> -/* For the calculation see asm/vsyscall.h. */ -#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000 - .text @@ -453,13 +450,11 @@ __pthread_cond_timedwait: movq __vdso_clock_gettime@GOTPCREL(%rip), %rax movq (%rax), %rax PTR_DEMANGLE (%rax) - jz 26f call *%rax - jmp 27f -# endif -26: movl $__NR_clock_gettime, %eax +# else + movl $__NR_clock_gettime, %eax syscall -27: +# endif # ifndef __ASSUME_POSIX_TIMERS cmpq $-ENOSYS, %rax je 19f @@ -473,8 +468,9 @@ __pthread_cond_timedwait: # else leaq 24(%rsp), %rdi xorl %esi, %esi - movq $VSYSCALL_ADDR_vgettimeofday, %rax - callq *%rax + /* This call works because we directly jump to a system call entry + which preserves all the registers. */ + call JUMPTARGET(__gettimeofday) /* Compute relative timeout. */ movq 40(%rsp), %rax @@ -611,8 +607,9 @@ __pthread_cond_timedwait: /* clock_gettime not available. */ 19: leaq 32(%rsp), %rdi xorl %esi, %esi - movq $VSYSCALL_ADDR_vgettimeofday, %rax - callq *%rax + /* This call works because we directly jump to a system call entry + which preserves all the registers. */ + call JUMPTARGET(__gettimeofday) /* Compute relative timeout. */ movq 40(%rsp), %rax diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S index f5d055c77e..0e6a6ee8b9 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002-2005, 2007, 2009, 2010 Free Software Foundation, Inc. +/* Copyright (C) 2002-2005,2007,2009,2010,2011 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -23,10 +23,6 @@ #include <pthread-errnos.h> #include <kernel-features.h> - -/* For the calculation see asm/vsyscall.h. */ -#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000 - .text .globl pthread_rwlock_timedrdlock @@ -123,8 +119,9 @@ pthread_rwlock_timedrdlock: /* Get current time. */ movq %rsp, %rdi xorl %esi, %esi - movq $VSYSCALL_ADDR_vgettimeofday, %rax - callq *%rax + /* 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 diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S index 6ed8b49bd6..16bf9203a7 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S @@ -1,4 +1,5 @@ -/* 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. @@ -23,10 +24,6 @@ #include <pthread-errnos.h> #include <kernel-features.h> - -/* For the calculation see asm/vsyscall.h. */ -#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000 - .text .globl pthread_rwlock_timedwrlock @@ -120,8 +117,9 @@ pthread_rwlock_timedwrlock: /* Get current time. */ movq %rsp, %rdi xorl %esi, %esi - movq $VSYSCALL_ADDR_vgettimeofday, %rax - callq *%rax + /* 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 |