+2012-08-07 Joseph Myers <joseph@codesourcery.com>
+
+ * sysdeps/unix/sysv/linux/kernel-features.h
+ (__ASSUME_PROT_GROWSUPDOWN): Remove.
+ (__ASSUME_NO_CLONE_DETACHED): Likewise.
+ (__ASSUME_GETDENTS32_D_TYPE): Likewise.
+ (__ASSUME_WAITID_SYSCALL): Likewise.
+ * sysdeps/unix/sysv/linux/dl-execstack.c
+ (_dl_make_stack_executable) [PROT_GROWSDOWN || PROT_GROWSUP]: Make
+ code unconditional.
+ (_dl_make_stack_executable) [!__ASSUME_PROT_GROWSUPDOWN]: Remove
+ conditional code.
+ * sysdeps/unix/sysv/linux/getdents.c (__GETDENTS)
+ [__ASSUME_GETDENTS32_D_TYPE]: Make code unconditional.
+ (__GETDENTS) [!__ASSUME_GETDENTS32_D_TYPE]: Remove conditional
+ code.
+ * sysdeps/unix/sysv/linux/waitid.c [__NR_waitid]: Make code
+ unconditional.
+ [__ASSUME_WAITID_SYSCALL]: Likewise.
+ [!__ASSUME_WAITID_SYSCALL]: Remove conditional code.
+
2012-08-07 Roland McGrath <roland@hack.frob.com>
* sysdeps/unix/closedir.c: Renamed to ...
+2012-08-07 Joseph Myers <joseph@codesourcery.com>
+
+ * sysdeps/pthread/createthread.c (create_thread)
+ [!__ASSUME_NO_CLONE_DETACHED]: Remove conditional code.
+
2012-08-03 Joseph Myers <joseph@codesourcery.com>
* nptl-init.c (sigcancel_handler) [__ASSUME_CORRECT_SI_PID]: Make
-/* Copyright (C) 2002-2007, 2008, 2010 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
sys_exit() in the location pointed to by the seventh parameter
to CLONE.
- CLONE_DETACHED
- No signal is generated if the thread exists and it is
- automatically reaped.
-
The termination signal is chosen to be zero which means no signal
is sent. */
int clone_flags = (CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGNAL
| CLONE_SETTLS | CLONE_PARENT_SETTID
| CLONE_CHILD_CLEARTID | CLONE_SYSVSEM
-#if __ASSUME_NO_CLONE_DETACHED == 0
- | CLONE_DETACHED
-#endif
| 0);
if (__builtin_expect (THREAD_GETMEM (THREAD_SELF, report_events), 0))
/* Stack executability handling for GNU dynamic linker. Linux version.
- Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+ Copyright (C) 2003-2012 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
|| __builtin_expect (*stack_endp != __libc_stack_end, 0))
return EPERM;
- /* Newer Linux kernels support a flag to make our job easy. */
-#if defined PROT_GROWSDOWN || defined PROT_GROWSUP
-# if __ASSUME_PROT_GROWSUPDOWN == 0
- static bool no_growsupdown;
- if (! no_growsupdown)
-# endif
- {
- if (__builtin_expect (__mprotect ((void *) page, GLRO(dl_pagesize),
- __stack_prot) == 0, 1))
- goto return_success;
-# if __ASSUME_PROT_GROWSUPDOWN == 0
- if (errno == EINVAL)
- no_growsupdown = true;
- else
-# endif
- {
- result = errno;
- goto out;
- }
- }
-#endif
-
- /* There is always a hole in the address space below the bottom of the
- stack. So when we make an mprotect call that starts below the bottom
- of the stack, it will include the hole and fail with ENOMEM.
-
- We start with a random guess at how deep the stack might have gotten
- so as to have extended the GROWSDOWN mapping to lower pages. */
-
-#if __ASSUME_PROT_GROWSUPDOWN == 0
- size_t size = GLRO(dl_pagesize) * 8;
-
-# if _STACK_GROWS_DOWN
- page = page + GLRO(dl_pagesize) - size;
- while (1)
- {
- if (__mprotect ((void *) page, size,
- __stack_prot & ~PROT_GROWSDOWN) == 0)
- /* We got this chunk changed; loop to do another chunk below. */
- page -= size;
- else
- {
- if (errno != ENOMEM) /* Unexpected failure mode. */
- {
- result = errno;
- goto out;
- }
-
- if (size == GLRO(dl_pagesize))
- /* We just tried to mprotect the top hole page and failed.
- We are done. */
- break;
-
- /* Our mprotect call failed because it started below the lowest
- stack page. Try again on just the top half of that region. */
- size /= 2;
- page += size;
- }
- }
-
-# elif _STACK_GROWS_UP
- while (1)
- {
- if (__mprotect ((void *) page, size, __stack_prot & ~PROT_GROWSUP) == 0)
- /* We got this chunk changed; loop to do another chunk below. */
- page += size;
- else
- {
- if (errno != ENOMEM) /* Unexpected failure mode. */
- {
- result = errno;
- goto out;
- }
-
- if (size == GLRO(dl_pagesize))
- /* We just tried to mprotect the lowest hole page and failed.
- We are done. */
- break;
-
- /* Our mprotect call failed because it extended past the highest
- stack page. Try again on just the bottom half of that region. */
- size /= 2;
- }
- }
-
-# else
-# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
-# endif
-#endif
+ if (__builtin_expect (__mprotect ((void *) page, GLRO(dl_pagesize),
+ __stack_prot) == 0, 1))
+ goto return_success;
+ result = errno;
+ goto out;
return_success:
/* Clear the address. */
{
ssize_t retval;
-#ifdef __ASSUME_GETDENTS32_D_TYPE
/* The d_ino and d_off fields in kernel_dirent and dirent must have
the same sizes and alignments. */
if (sizeof (DIRENT_TYPE) == sizeof (struct dirent)
return retval;
}
-#endif
off64_t last_offset = -1;
DIRENT_SET_DP_INO(dp, kdp->d_ino);
dp->d_off = kdp->d_off;
dp->d_reclen = new_reclen;
-#ifdef __ASSUME_GETDENTS32_D_TYPE
dp->d_type = *((char *) kdp + kdp->d_reclen - 1);
-#else
- dp->d_type = DT_UNKNOWN;
-#endif
memcpy (dp->d_name, kdp->d_name,
kdp->d_reclen - offsetof (struct kernel_dirent, d_name));
# define __ASSUME_FADVISE64_64_SYSCALL 1
#endif
-/* The PROT_GROWSDOWN/PROT_GROWSUP flags were introduced in the 2.6.0-test
- series. */
-#define __ASSUME_PROT_GROWSUPDOWN 1
-
/* Starting with 2.6.0 PowerPC adds signal/swapcontext support for Vector
SIMD (AKA Altivec, VMX) instructions and register state. This changes
the overall size of the sigcontext and adds the swapcontext syscall. */
# define __ASSUME_SWAPCONTEXT_SYSCALL 1
#endif
-/* The CLONE_DETACHED flag is not necessary in 2.6.2 kernels, it is
- implied. */
-#define __ASSUME_NO_CLONE_DETACHED 1
-
-/* Starting with version 2.6.4-rc1 the getdents syscall returns d_type
- information as well and in between 2.6.5 and 2.6.8 most compat wrappers
- were fixed too. Except s390{,x} which was fixed in 2.6.11. */
-#define __ASSUME_GETDENTS32_D_TYPE 1
-
-/* Starting with version 2.6.9, the waitid system call is available.
- Except for powerpc{,64} and s390{,x}, where it is available in 2.6.12. */
-#define __ASSUME_WAITID_SYSCALL 1
-
/* On sparc64 stat64/lstat64/fstat64 syscalls were introduced in 2.6.12. */
#if defined __sparc__ && defined __arch64__
# define __ASSUME_STAT64_SYSCALL 1
/* Linux implementation of waitid.
- Copyright (C) 2004 Free Software Foundation, Inc.
+ Copyright (C) 2004-2012 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
#include <stddef.h>
#include <errno.h>
#include <sys/wait.h>
-#include <kernel-features.h>
#include <sysdep.h>
-
-#ifdef __NR_waitid
-
-# if __ASSUME_WAITID_SYSCALL > 0
-
static inline int
do_waitid (idtype_t idtype, id_t id, siginfo_t *infop, int options)
{
pass if we were using waitid to simulate wait3/wait4. */
return INLINE_SYSCALL (waitid, 5, idtype, id, infop, options, NULL);
}
-# define NO_DO_WAITID
-
-# else
-
-static int do_compat_waitid (idtype_t idtype, id_t id,
- siginfo_t *infop, int options);
-# define DO_WAITID do_compat_waitid
-
-static int
-do_waitid (idtype_t idtype, id_t id, siginfo_t *infop, int options)
-{
- static int waitid_works;
- if (waitid_works > 0)
- return INLINE_SYSCALL (waitid, 5, idtype, id, infop, options, NULL);
- if (waitid_works == 0)
- {
- int result = INLINE_SYSCALL (waitid, 5,
- idtype, id, infop, options, NULL);
- if (result < 0 && errno == ENOSYS)
- waitid_works = -1;
- else
- {
- waitid_works = 1;
- return result;
- }
- }
- return do_compat_waitid (idtype, id, infop, options);
-}
-
-# endif
-
-#endif
+#define NO_DO_WAITID
#include "sysdeps/posix/waitid.c"
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