Update.
2003-12-11 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/kernel-features.h: Remove __ASSUME_VSYSCALL. There might always be processes which have no vDSO. * sysdeps/generic/dl-sysdep.c: Remove __ASSUME_VSYSCALL uses. * sysdeps/unix/sysv/linux/i386/sigaction.c: Likewise.
This commit is contained in:
Ulrich Drepper
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1ce9631b86
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8e4f5035e3
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@ -1,3 +1,10 @@
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2003-12-11 Ulrich Drepper <drepper@redhat.com>
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* sysdeps/unix/sysv/linux/kernel-features.h: Remove __ASSUME_VSYSCALL.
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There might always be processes which have no vDSO.
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* sysdeps/generic/dl-sysdep.c: Remove __ASSUME_VSYSCALL uses.
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* sysdeps/unix/sysv/linux/i386/sigaction.c: Likewise.
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2003-12-11 Carlos O'Donell <carlos@baldric.uwo.ca>
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* sysdeps/generic/dl-fptr.c (COMPARE_AND_SWAP): Pass new and old
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@ -97,7 +97,7 @@ _dl_sysdep_start (void **start_argptr,
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# define set_seen(tag) seen |= M ((tag)->a_type)
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# endif
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#endif
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#if defined NEED_DL_SYSINFO && !defined __ASSUME_VSYSCALL
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#ifdef NEED_DL_SYSINFO
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ElfW(Word) new_sysinfo = 0;
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#endif
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@ -158,11 +158,7 @@ _dl_sysdep_start (void **start_argptr,
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break;
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#ifdef NEED_DL_SYSINFO
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case AT_SYSINFO:
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# ifndef __ASSUME_VSYSCALL
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new_sysinfo = av->a_un.a_val;
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# else
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GL(dl_sysinfo) = av->a_un.a_val;
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# endif
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break;
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case AT_SYSINFO_EHDR:
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GL(dl_sysinfo_dso) = av->a_un.a_ptr;
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@ -202,7 +198,7 @@ _dl_sysdep_start (void **start_argptr,
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GL(dl_pagesize) = __getpagesize ();
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#endif
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#if defined NEED_DL_SYSINFO && !defined __ASSUME_VSYSCALL
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#if defined NEED_DL_SYSINFO
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/* Only set the sysinfo value if we also have the vsyscall DSO. */
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if (GL(dl_sysinfo_dso) != 0)
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GL(dl_sysinfo) = new_sysinfo;
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@ -25,6 +25,7 @@
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#include <sysdep.h>
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#include <sys/syscall.h>
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#include <ldsodefs.h>
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#include <kernel-features.h>
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@ -84,16 +85,16 @@ __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
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if (act)
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{
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kact.k_sa_handler = act->sa_handler;
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kact.sa_flags = act->sa_flags;
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memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t));
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# if __ASSUME_VSYSCALL == 0
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kact.sa_flags = act->sa_flags | SA_RESTORER;
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if (GL(dl_sysinfo_dso) == NULL)
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{
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kact.sa_flags |= SA_RESTORER;
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kact.sa_restorer = ((act->sa_flags & SA_SIGINFO)
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? &restore_rt : &restore);
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# else
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kact.sa_flags = act->sa_flags;
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# endif
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kact.sa_restorer = ((act->sa_flags & SA_SIGINFO)
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? &restore_rt : &restore);
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}
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}
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/* XXX The size argument hopefully will have to be changed to the
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@ -159,7 +160,6 @@ libc_hidden_weak (__sigaction)
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weak_alias (__libc_sigaction, sigaction)
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#endif
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#if __ASSUME_VSYSCALL == 0
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/* NOTE: Please think twice before making any changes to the bits of
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code below. GDB needs some intimate knowledge about it to
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recognize them as signal trampolines, and make backtraces through
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@ -168,8 +168,8 @@ weak_alias (__libc_sigaction, sigaction)
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If you ever feel the need to make any changes, please notify the
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appropriate GDB maintainer. */
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# define RESTORE(name, syscall) RESTORE2 (name, syscall)
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# define RESTORE2(name, syscall) \
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#define RESTORE(name, syscall) RESTORE2 (name, syscall)
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#define RESTORE2(name, syscall) \
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asm \
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( \
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".text\n" \
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@ -179,14 +179,14 @@ asm \
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" int $0x80" \
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);
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# ifdef __NR_rt_sigaction
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#ifdef __NR_rt_sigaction
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/* The return code for realtime-signals. */
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RESTORE (restore_rt, __NR_rt_sigreturn)
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# endif
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#endif
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/* For the boring old signals. */
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# undef RESTORE2
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# define RESTORE2(name, syscall) \
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#undef RESTORE2
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#define RESTORE2(name, syscall) \
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asm \
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( \
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".text\n" \
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@ -198,4 +198,3 @@ asm \
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);
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RESTORE (restore, __NR_sigreturn)
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#endif
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@ -320,12 +320,6 @@
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# define __ASSUME_NETLINK_SUPPORT 1
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#endif
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/* For x86, support for the sysenter instruction was available in
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2.5.53. But the unwind information was added only in 2.5.69. */
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#if __LINUX_KERNEL_VERSION >= 132421 && defined __i386__
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# define __ASSUME_VSYSCALL 1
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#endif
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/* The requeue futex functionality was introduced in 2.5.70. */
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#if __LINUX_KERNEL_VERSION >= 132422
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# define __ASSUME_FUTEX_REQUEUE 1
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