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| author | Ulrich Drepper <drepper@redhat.com> | 2007-08-13 18:47:42 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2007-08-13 18:47:42 +0000 |
| commit | 9c6f6953fda96b49c8510a879304ea4222ea1781 (patch) | |
| tree | c169827926668d35139d9d1bbe26db86c17f8e6d /sysdeps | |
| parent | f8de5057b9ded1d4ff41d8614530a83ba338c9e8 (diff) | |
| download | glibc-9c6f6953fda96b49c8510a879304ea4222ea1781.tar.gz glibc-9c6f6953fda96b49c8510a879304ea4222ea1781.tar.xz glibc-9c6f6953fda96b49c8510a879304ea4222ea1781.zip | |
* sysdeps/unix/sysv/linux/x86_64/libc-start.c
(_libc_vdso_platform_setup): If vDSO is not available point __vdso_gettimeofday to the vsyscall. * sysdeps/unix/sysv/linux/x86_64/gettimeofday.S [SHARED]: Use __vdso_gettimeofday instead of vsyscall.
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/gettimeofday.S | 7 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/libc-start.c | 4 |
2 files changed, 10 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/gettimeofday.S b/sysdeps/unix/sysv/linux/x86_64/gettimeofday.S index 84a99b0406..f618e738b1 100644 --- a/sysdeps/unix/sysv/linux/x86_64/gettimeofday.S +++ b/sysdeps/unix/sysv/linux/x86_64/gettimeofday.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2007 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 @@ -28,7 +28,12 @@ ENTRY (__gettimeofday) /* Align stack. */ sub $0x8, %rsp cfi_adjust_cfa_offset(8) +#ifdef SHARED + movq __vdso_gettimeofday(%rip), %rax + PTR_DEMANGLE (%rax) +#else movq $VSYSCALL_ADDR_vgettimeofday, %rax +#endif callq *%rax /* Check error return. */ cmpl $-4095, %eax diff --git a/sysdeps/unix/sysv/linux/x86_64/libc-start.c b/sysdeps/unix/sysv/linux/x86_64/libc-start.c index 0ce47952d7..dea2e8afe4 100644 --- a/sysdeps/unix/sysv/linux/x86_64/libc-start.c +++ b/sysdeps/unix/sysv/linux/x86_64/libc-start.c @@ -31,6 +31,10 @@ _libc_vdso_platform_setup (void) PREPARE_VERSION (linux26, "LINUX_2.6", 61765110); void *p = _dl_vdso_vsym ("gettimeofday", &linux26); + /* If the vDSO is not available we fall back on the old vsyscall. */ +#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000ul + if (p == NULL) + p = (void *) VSYSCALL_ADDR_vgettimeofday; PTR_MANGLE (p); __vdso_gettimeofday = p; |