File glibc-2.15-vsyscall.patch of Package glibc
commit 91b392a4bab0c2dc90e7e3ff914dec20b97adca8
Author: Ulrich Drepper <drepper@gmail.com>
Date: Sun Aug 21 13:52:28 2011 -0400
Use ifuncs for time and gettimeofday on x86-64
2011-08-21 Ulrich Drepper <drepper@gmail.com>
* sysdeps/unix/sysv/linux/x86_64/gettimeofday.S: Removed.
* sysdeps/unix/sysv/linux/x86_64/time.S: Removed.
* sysdeps/unix/sysv/linux/x86_64/gettimeofday.c: New file.
* sysdeps/unix/sysv/linux/x86_64/time.c: New file.
* sysdeps/unix/sysv/linux/x86_64/bits/libc-vdso.h: Remove declaration
of __vdso_gettimeofday.
* sysdeps/unix/sysv/linux/x86_64/init-first.c: Remove definition of
__vdso_gettimeofday and __vdso_time. Define __vdso_getcpu with
attribute_hidden.
(_libc_vdso_platform_setup): Remove initialization of
__vdso_gettimeofday and __vdso_time.
diff --git a/sysdeps/unix/sysv/linux/x86_64/bits/libc-vdso.h b/sysdeps/unix/sysv/linux/x86_64/bits/libc-vdso.h
index d7123c9..f9bf84e 100644
--- a/sysdeps/unix/sysv/linux/x86_64/bits/libc-vdso.h
+++ b/sysdeps/unix/sysv/linux/x86_64/bits/libc-vdso.h
@@ -1,5 +1,5 @@
/* Resolve function pointers to VDSO functions.
- Copyright (C) 2005, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2005, 2007, 2011 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
@@ -25,9 +25,6 @@
#ifdef SHARED
-extern long int (*__vdso_gettimeofday) (struct timeval *, void *)
- attribute_hidden;
-
extern long int (*__vdso_clock_gettime) (clockid_t, struct timespec *);
#endif
diff --git a/sysdeps/unix/sysv/linux/x86_64/gettimeofday.S b/sysdeps/unix/sysv/linux/x86_64/gettimeofday.S
deleted file mode 100644
index f618e73..0000000
--- a/sysdeps/unix/sysv/linux/x86_64/gettimeofday.S
+++ /dev/null
@@ -1,49 +0,0 @@
-/* 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
- 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 <sysdep.h>
-#define _ERRNO_H 1
-#include <bits/errno.h>
-
-/* For the calculation see asm/vsyscall.h. */
-#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000
-
-
-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
- jae SYSCALL_ERROR_LABEL
-
-L(pseudo_end):
- add $0x8, %rsp
- cfi_adjust_cfa_offset(-8)
- ret
-PSEUDO_END(__gettimeofday)
-
-strong_alias (__gettimeofday, __gettimeofday_internal)
-weak_alias (__gettimeofday, gettimeofday)
diff --git a/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c b/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c
new file mode 100644
index 0000000..1a773d6
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c
@@ -0,0 +1,49 @@
+/* Copyright (C) 2002, 2003, 2007, 2011 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 <dl-vdso.h>
+
+
+#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000ul
+
+
+#ifdef SHARED
+void *gettimeofday_ifunc (void) __asm__ ("__gettimeofday");
+
+void *
+gettimeofday_ifunc (void)
+{
+ PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
+
+ /* If the vDSO is not available we fall back on the old vsyscall. */
+ return (_dl_vdso_vsym ("gettimeofday", &linux26)
+ ?: (void *) VSYSCALL_ADDR_vgettimeofday);
+}
+__asm (".type __gettimeofday, %gnu_indirect_function");
+#else
+# include <sys/time.h>
+
+int
+__gettimeofday (struct timeval *tv, struct timezone *tz)
+{
+ return ((int (*) (struct timeval *, struct timezone *)) VSYSCALL_ADDR_vgettimeofday) (tv, tz);
+}
+#endif
+
+weak_alias (__gettimeofday, gettimeofday)
+strong_alias (__gettimeofday, __gettimeofday_internal)
diff --git a/sysdeps/unix/sysv/linux/x86_64/init-first.c b/sysdeps/unix/sysv/linux/x86_64/init-first.c
index e676f62..25cf08b 100644
--- a/sysdeps/unix/sysv/linux/x86_64/init-first.c
+++ b/sysdeps/unix/sysv/linux/x86_64/init-first.c
@@ -20,15 +20,11 @@
# include <dl-vdso.h>
# include <bits/libc-vdso.h>
-long int (*__vdso_gettimeofday) (struct timeval *, void *) attribute_hidden;
-
long int (*__vdso_clock_gettime) (clockid_t, struct timespec *)
__attribute__ ((nocommon));
strong_alias (__vdso_clock_gettime, __GI___vdso_clock_gettime attribute_hidden)
-long int (*__vdso_getcpu) (unsigned *, unsigned *, void *);
-
-long int (*__vdso_time) (time_t *) attribute_hidden;
+long int (*__vdso_getcpu) (unsigned *, unsigned *, void *) attribute_hidden;
static inline void
@@ -36,15 +32,7 @@ _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;
-
- p = _dl_vdso_vsym ("clock_gettime", &linux26);
+ void *p = _dl_vdso_vsym ("clock_gettime", &linux26);
PTR_MANGLE (p);
__GI___vdso_clock_gettime = p;
@@ -55,14 +43,6 @@ _libc_vdso_platform_setup (void)
p = (void *) VSYSCALL_ADDR_vgetcpu;
PTR_MANGLE (p);
__vdso_getcpu = p;
-
- p = _dl_vdso_vsym ("time", &linux26);
- /* If the vDSO is not available we fall back on the old vsyscall. */
-#define VSYSCALL_ADDR_vtime 0xffffffffff600400
- if (p == NULL)
- p = (void *) VSYSCALL_ADDR_vtime;
- PTR_MANGLE (p);
- __vdso_time = p;
}
# define VDSO_SETUP _libc_vdso_platform_setup
diff --git a/sysdeps/unix/sysv/linux/x86_64/time.S b/sysdeps/unix/sysv/linux/x86_64/time.S
deleted file mode 100644
index 66d7498..0000000
--- a/sysdeps/unix/sysv/linux/x86_64/time.S
+++ /dev/null
@@ -1,47 +0,0 @@
-/* Copyright (C) 2001,02, 2003, 2011 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 <sysdep.h>
-#define _ERRNO_H 1
-#include <bits/errno.h>
-
-/* For the calculation see asm/vsyscall.h. */
-#define VSYSCALL_ADDR_vtime 0xffffffffff600400
-
-
-/* Return the current time as a `time_t' and also put it in *T if T is
- not NULL. Time is represented as seconds from Jan 1 00:00:00 1970. */
-
-ENTRY (time)
- /* Align stack. */
- sub $0x8, %rsp
- cfi_adjust_cfa_offset(8)
-
-#ifdef SHARED
- movq __vdso_time(%rip), %rax
- PTR_DEMANGLE (%rax)
-#else
- movq $VSYSCALL_ADDR_vtime, %rax
-#endif
- callq *%rax
-
- add $0x8, %rsp
- cfi_adjust_cfa_offset(-8)
- ret
-PSEUDO_END_NOERRNO(time)
-libc_hidden_def (time)
diff --git a/sysdeps/unix/sysv/linux/x86_64/time.c b/sysdeps/unix/sysv/linux/x86_64/time.c
new file mode 100644
index 0000000..698d561
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/x86_64/time.c
@@ -0,0 +1,47 @@
+/* Copyright (C) 2001,02, 2003, 2011 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 <dl-vdso.h>
+
+
+#define VSYSCALL_ADDR_vtime 0xffffffffff600400
+
+
+#ifdef SHARED
+void *time_ifunc (void) __asm__ ("time");
+
+void *
+time_ifunc (void)
+{
+ PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
+
+ /* If the vDSO is not available we fall back on the old vsyscall. */
+ return _dl_vdso_vsym ("time", &linux26) ?: (void *) VSYSCALL_ADDR_vtime;
+}
+__asm (".type time, %gnu_indirect_function");
+#else
+# include <time.h>
+
+time_t
+time (time_t *t)
+{
+ return ((time_t (*) (time_t *)) VSYSCALL_ADDR_vtime) (t);
+}
+#endif
+
+strong_alias (time, __GI_time)
commit 2bc174332ba6ddbd1b855dced33889bef56e8ba3
Author: Andreas Schwab <schwab@redhat.com>
Date: Tue Aug 30 15:37:54 2011 +0200
Relocate objects in dependency order
2011-08-30 Andreas Schwab <schwab@redhat.com>
* elf/rtld.c (dl_main): Relocate objects in dependency order.
diff --git a/elf/rtld.c b/elf/rtld.c
index 87bb5f0..4f6bbfd 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -2255,13 +2255,12 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n",
/* If we are profiling we also must do lazy reloaction. */
GLRO(dl_lazy) |= consider_profiling;
- struct link_map *l = main_map;
- while (l->l_next)
- l = l->l_next;
-
HP_TIMING_NOW (start);
- do
+ unsigned i = main_map->l_searchlist.r_nlist;
+ while (i-- > 0)
{
+ struct link_map *l = main_map->l_initfini[i];
+
/* While we are at it, help the memory handling a bit. We have to
mark some data structures as allocated with the fake malloc()
implementation in ld.so. */
@@ -2280,10 +2279,7 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n",
/* Add object to slot information data if necessasy. */
if (l->l_tls_blocksize != 0 && tls_init_tp_called)
_dl_add_to_slotinfo (l);
-
- l = l->l_prev;
}
- while (l);
HP_TIMING_NOW (stop);
HP_TIMING_DIFF (relocate_time, start, stop);
commit ef60624956e93df1da329a48570776ed963b1916
Author: Ulrich Drepper <drepper@gmail.com>
Date: Tue Sep 6 00:12:18 2011 -0400
Prefer real syscalls instead of vsyscalls on x86-64 outside libc.so
2011-09-06 Ulrich Drepper <drepper@gmail.com>
* sysdeps/unix/sysv/linux/kernel-features.h: Add entry for getcpu
syscall on x86-64.
* sysdeps/unix/sysv/linux/x86_64/gettimeofday.c [!SHARED]: Use real
syscall.
* sysdeps/unix/sysv/linux/x86_64/time.c: Likewise.
* sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S [!SHARED]: Use real
syscall if possible.
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h
index d91f581..58f833e 100644
--- a/sysdeps/unix/sysv/linux/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/kernel-features.h
@@ -546,3 +546,8 @@
#if __LINUX_KERNEL_VERSION >= 0x020627
# define __ASSUME_SENDMMSG 1
#endif
+
+/* getcpu is a syscall for x86-64 since 3.1. */
+#if defined __x86_64__ && __LINUX_KERNEL_VERSION >= 0x030100
+# define __ASSUME_GETCPU_SYSCALL 1
+#endif
diff --git a/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c b/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c
index 1a773d6..56171bc 100644
--- a/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c
+++ b/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c
@@ -37,11 +37,12 @@ gettimeofday_ifunc (void)
__asm (".type __gettimeofday, %gnu_indirect_function");
#else
# include <sys/time.h>
+# include <sysdep.h>
int
__gettimeofday (struct timeval *tv, struct timezone *tz)
{
- return ((int (*) (struct timeval *, struct timezone *)) VSYSCALL_ADDR_vgettimeofday) (tv, tz);
+ return INLINE_SYSCALL (gettimeofday, 2, tv, tz);
}
#endif
diff --git a/sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S b/sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S
index 8ec7d3f..246c955 100644
--- a/sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S
+++ b/sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S
@@ -20,6 +20,7 @@
#include <tls.h>
#define _ERRNO_H 1
#include <bits/errno.h>
+#include <kernel-features.h>
/* For the calculation see asm/vsyscall.h. */
#define VSYSCALL_ADDR_vgetcpu 0xffffffffff600800
@@ -38,10 +39,26 @@ ENTRY (sched_getcpu)
#ifdef SHARED
movq __vdso_getcpu(%rip), %rax
PTR_DEMANGLE (%rax)
+ callq *%rax
#else
+# ifdef __NR_getcpu
+ movl $__NR_getcpu, %eax
+ syscall
+# ifndef __ASSUME_GETCPU_SYSCALL
+ cmpq $-ENOSYS, %rax
+ jne 1f
+# endif
+# endif
+# ifndef __ASSUME_GETCPU_SYSCALL
movq $VSYSCALL_ADDR_vgetcpu, %rax
-#endif
callq *%rax
+1:
+# else
+# ifndef __NR_getcpu
+# error "cannot happen"
+# endif
+# endif
+#endif
cmpq $-4095, %rax
jae SYSCALL_ERROR_LABEL
diff --git a/sysdeps/unix/sysv/linux/x86_64/time.c b/sysdeps/unix/sysv/linux/x86_64/time.c
index 698d561..c1c1a75 100644
--- a/sysdeps/unix/sysv/linux/x86_64/time.c
+++ b/sysdeps/unix/sysv/linux/x86_64/time.c
@@ -36,11 +36,13 @@ time_ifunc (void)
__asm (".type time, %gnu_indirect_function");
#else
# include <time.h>
+# include <sysdep.h>
time_t
time (time_t *t)
{
- return ((time_t (*) (time_t *)) VSYSCALL_ADDR_vtime) (t);
+ INTERNAL_SYSCALL_DECL (err);
+ return INTERNAL_SYSCALL (time, err, 1, t);
}
#endif
2011-09-06 Andreas Jaeger <aj@suse.de>
* sysdeps/unix/sysv/linux/x86_64/gettimeofday.c: Include <errno.h>
to fix build.
Index: glibc-2.14/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c
===================================================================
--- glibc-2.14.orig/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c
+++ glibc-2.14/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c
@@ -36,6 +36,7 @@ gettimeofday_ifunc (void)
}
__asm (".type __gettimeofday, %gnu_indirect_function");
#else
+# include <errno.h>
# include <sys/time.h>
# include <sysdep.h>
