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Remove __ASSUME_FCNTL64.

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This commit is contained in:
Joseph Myers 2012-08-01 21:27:58 +00:00
parent a9f1039f0a
commit 23bddc0668
14 changed files with 47 additions and 286 deletions
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17
ChangeLog
View file

@ -1,5 +1,22 @@
2012-08-01 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_FCNTL64):
Remove all definitions.
* sysdeps/unix/sysv/linux/i386/fcntl.c: Do not include
<kernel-features.h>.
[!__ASSUME_FCNTL64] (__have_no_fcntl64): Remove.
(miss_F_GETOWN_EX): Remove all definitions.
[NO_CANCELLATION && !__ASSUME_FCNTL64] (__fcntl_nocancel): Remove
macro definition.
[!__ASSUME_FCNTL64]: Remove conditional code.
[__ASSUME_FCNTL64]: Make code unconditional.
* sysdeps/unix/sysv/linux/i386/lockf64.c: Do not include
<kernel-features.h>.
[__NR_fcntl64 && !__ASSUME_FCNTL64] (__have_no_fcntl64): Remove.
(lockf64) [!__ASSUME_FCNTL64]: Remove conditional code.
(lockf64) [__NR_fcntl64]: Make code unconditional.
(lockf64) [__ASSUME_FCNTL64]: Likewise.
* sysdeps/unix/sysv/linux/kernel-features.h
(__ASSUME_VFORK_SYSCALL): Remove all definitions.
* sysdeps/unix/sysv/linux/i386/vfork.S (__vfork) [__NR_vfork]:

3
ports/ChangeLog.arm
View file

@ -1,5 +1,8 @@
2012-08-01 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/arm/kernel-features.h
(__ASSUME_FCNTL64): Remove.
* sysdeps/unix/sysv/linux/arm/kernel-features.h
(__ASSUME_VFORK_SYSCALL): Remove.

5
ports/ChangeLog.hppa
View file

@ -1,3 +1,8 @@
2012-08-01 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/hppa/kernel-features.h
(__ASSUME_FCNTL64): Remove.
2012-07-26 Andreas Jaeger <aj@suse.de>
* sysdeps/unix/sysv/linux/hppa/sys/epoll.h (EPOLLWAKEUP): Add new

3
ports/ChangeLog.m68k
View file

@ -1,5 +1,8 @@
2012-08-01 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/m68k/kernel-features.h
(__ASSUME_FCNTL64): Remove.
* sysdeps/unix/sysv/linux/m68k/kernel-features.h
(__ASSUME_VFORK_SYSCALL): Remove.
* sysdeps/unix/sysv/linux/m68k/vfork.S (__vfork) [__NR_vfork]:

5
ports/ChangeLog.mips
View file

@ -1,3 +1,8 @@
2012-08-01 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/mips/kernel-features.h
(__ASSUME_FCNTL64): Remove.
2012-08-01 Steve Ellcey <sellcey@mips.com>
* sysdeps/mips/sys/asm.h [_MIPS_ISA != _MIPS_ISA_MIPS4 &&

5
ports/ChangeLog.tile
View file

@ -1,3 +1,8 @@
2012-08-01 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/tile/kernel-features.h
(__ASSUME_FCNTL64): Remove.
2012-07-26 Andreas Jaeger <aj@suse.de>
* sysdeps/unix/sysv/linux/tile/sys/ptrace.h (__ptrace_eventcodes):

3
ports/sysdeps/unix/sysv/linux/arm/kernel-features.h
View file

@ -27,9 +27,6 @@
#define __ASSUME_MMAP2_SYSCALL 1
#define __ASSUME_STAT64_SYSCALL 1
/* Arm got fcntl64 in 2.4.4. */
#define __ASSUME_FCNTL64 1
/* The signal frame layout changed in 2.6.18. */
#if __LINUX_KERNEL_VERSION >= 132626
# define __ASSUME_SIGFRAME_V2 1

1
ports/sysdeps/unix/sysv/linux/hppa/kernel-features.h
View file

@ -27,7 +27,6 @@
#define __ASSUME_STAT64_SYSCALL 1
#define __ASSUME_IPC64 1
#define __ASSUME_ST_INO_64_BIT 1
#define __ASSUME_FCNTL64 1
#define __ASSUME_GETDENTS64_SYSCALL 1
/* PA-RISC 2.6.9 kernels had the first LWS CAS support */

1
ports/sysdeps/unix/sysv/linux/m68k/kernel-features.h
View file

@ -20,7 +20,6 @@
/* These features were surely available with 2.4.12. */
#define __ASSUME_MMAP2_SYSCALL 1
#define __ASSUME_STAT64_SYSCALL 1
#define __ASSUME_FCNTL64 1
/* Many syscalls were added in 2.6.10 for m68k. */
#if __LINUX_KERNEL_VERSION >= 132618

4
ports/sysdeps/unix/sysv/linux/mips/kernel-features.h
View file

@ -22,10 +22,6 @@
/* MIPS platforms had IPC64 all along. */
#define __ASSUME_IPC64 1
#if _MIPS_SIM == _ABIN32
# define __ASSUME_FCNTL64 1
#endif
/* Support for the eventfd2 and signalfd4 syscalls was added in 2.6.27. */
#if __LINUX_KERNEL_VERSION >= 0x02061c
# define __ASSUME_EVENTFD2 1

3
ports/sysdeps/unix/sysv/linux/tile/kernel-features.h
View file

@ -1,4 +1,4 @@
/* Copyright (C) 2011 Free Software Foundation, Inc.
/* Copyright (C) 2011-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
@ -20,7 +20,6 @@
/* TILE glibc support starts with 2.6.36, guaranteeing many kernel features. */
#define __ASSUME_MMAP2_SYSCALL 1
#define __ASSUME_STAT64_SYSCALL 1
#define __ASSUME_FCNTL64 1
#define __ASSUME_CLONE_THREAD_FLAGS 1
#define __ASSUME_TGKILL 1
#define __ASSUME_UTIMES 1

134
sysdeps/unix/sysv/linux/i386/fcntl.c
View file

@ -1,4 +1,4 @@
/* Copyright (C) 2000,2002-2004,2006,2009,2010 Free Software Foundation, Inc.
/* Copyright (C) 2000-2012 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
@ -22,25 +22,8 @@
#include <stdarg.h>
#include <sys/syscall.h>
#include <kernel-features.h>
#ifndef __ASSUME_FCNTL64
/* This variable is shared with all files that check for fcntl64. */
int __have_no_fcntl64;
#endif
#ifdef __ASSUME_F_GETOWN_EX
# define miss_F_GETOWN_EX 0
#elif !defined __ASSUME_FCNTL64
static int miss_F_GETOWN_EX;
#endif
#if defined NO_CANCELLATION && !defined __ASSUME_FCNTL64
# define __fcntl_nocancel __libc_fcntl
#endif
#if !defined NO_CANCELLATION || !defined __ASSUME_FCNTL64
#ifndef NO_CANCELLATION
int
__fcntl_nocancel (int fd, int cmd, ...)
{
@ -51,112 +34,11 @@ __fcntl_nocancel (int fd, int cmd, ...)
arg = va_arg (ap, void *);
va_end (ap);
#ifndef __ASSUME_FCNTL64
# ifdef __NR_fcntl64
if (! __have_no_fcntl64)
{
int result = INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg);
if (result >= 0 || errno != ENOSYS)
return result;
__have_no_fcntl64 = 1;
}
# endif
switch (cmd)
{
case F_GETLK64:
/* Convert arg from flock64 to flock and back. */
{
struct flock fl;
struct flock64 *fl64 = arg;
int res;
fl.l_start = (off_t)fl64->l_start;
/* Check if we can represent the values with the smaller type. */
if ((off64_t) fl.l_start != fl64->l_start)
{
eoverflow:
__set_errno (EOVERFLOW);
return -1;
}
fl.l_len = (off_t) fl64->l_len;
/* Check if we can represent the values with the smaller type. */
if ((off64_t) fl.l_len != fl64->l_len)
goto eoverflow;
fl.l_type = fl64->l_type;
fl.l_whence = fl64->l_whence;
fl.l_pid = fl64->l_pid;
res = INLINE_SYSCALL (fcntl, 3, fd, F_GETLK, &fl);
if (res != 0)
return res;
/* Everything ok, convert back. */
fl64->l_type = fl.l_type;
fl64->l_whence = fl.l_whence;
fl64->l_start = fl.l_start;
fl64->l_len = fl.l_len;
fl64->l_pid = fl.l_pid;
return 0;
}
case F_SETLK64:
case F_SETLKW64:
/* Try to convert arg from flock64 to flock. */
{
struct flock fl;
struct flock64 *fl64 = arg;
fl.l_start = (off_t) fl64->l_start;
/* Check if we can represent the values with the smaller type. */
if ((off64_t) fl.l_start != fl64->l_start)
goto eoverflow;
fl.l_len = (off_t)fl64->l_len;
/* Check if we can represent the values with the smaller type. */
if ((off64_t) fl.l_len != fl64->l_len)
{
__set_errno (EOVERFLOW);
return -1;
}
fl.l_type = fl64->l_type;
fl.l_whence = fl64->l_whence;
fl.l_pid = fl64->l_pid;
assert (F_SETLK - F_SETLKW == F_SETLK64 - F_SETLKW64);
return INLINE_SYSCALL (fcntl, 3, fd, cmd + F_SETLK - F_SETLK64, &fl);
}
case F_GETOWN:
if (! miss_F_GETOWN_EX)
{
INTERNAL_SYSCALL_DECL (err);
struct f_owner_ex fex;
int res = INTERNAL_SYSCALL (fcntl, err, 3, fd, F_GETOWN_EX, &fex);
if (!INTERNAL_SYSCALL_ERROR_P (res, err))
return fex.type == F_OWNER_GID ? -fex.pid : fex.pid;
# ifndef __ASSUME_F_GETOWN_EX
if (INTERNAL_SYSCALL_ERRNO (res, err) == EINVAL)
miss_F_GETOWN_EX = 1;
else
# endif
{
__set_errno (INTERNAL_SYSCALL_ERRNO (res, err));
return -1;
}
}
/* FALLTHROUGH */
default:
return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg);
}
return -1;
#else
return INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg);
#endif /* !__ASSUME_FCNTL64 */
}
#endif /* NO_CANCELLATION || !__ASSUME_FCNTL64 */
#endif /* NO_CANCELLATION */
#ifndef __fcntl_nocancel
int
__libc_fcntl (int fd, int cmd, ...)
{
@ -167,27 +49,17 @@ __libc_fcntl (int fd, int cmd, ...)
arg = va_arg (ap, void *);
va_end (ap);
# ifdef __ASSUME_FCNTL64
if (SINGLE_THREAD_P || (cmd != F_SETLKW && cmd != F_SETLKW64))
return INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg);
int oldtype = LIBC_CANCEL_ASYNC ();
int result = INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg);
# else
if (SINGLE_THREAD_P || (cmd != F_SETLKW && cmd != F_SETLKW64))
return __fcntl_nocancel (fd, cmd, arg);
int oldtype = LIBC_CANCEL_ASYNC ();
int result = __fcntl_nocancel (fd, cmd, arg);
# endif
LIBC_CANCEL_RESET (oldtype);
return result;
}
#endif
libc_hidden_def (__libc_fcntl)
weak_alias (__libc_fcntl, __fcntl)

135
sysdeps/unix/sysv/linux/i386/lockf64.c
View file

@ -1,5 +1,4 @@
/* Copyright (C) 1994,1996,1997,1998,1999,2000,2003,2006
Free Software Foundation, Inc.
/* Copyright (C) 1994-2012 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
@ -23,66 +22,24 @@
#include <string.h>
#include <sysdep.h>
#include <kernel-features.h>
/* lockf is a simplified interface to fcntl's locking facilities. */
#ifdef __NR_fcntl64
# if __ASSUME_FCNTL64 == 0
/* This variable is shared with all files that check for fcntl64. The
declaration is in fcntl.c. */
extern int __have_no_fcntl64;
# endif
#endif
int
lockf64 (int fd, int cmd, off64_t len64)
{
#if __ASSUME_FCNTL64 == 0
struct flock fl;
off_t len = (off_t) len64;
#endif
#ifdef __NR_fcntl64
struct flock64 fl64;
int cmd64;
#endif
#if __ASSUME_FCNTL64 == 0
memset ((char *) &fl, '\0', sizeof (fl));
memset ((char *) &fl64, '\0', sizeof (fl64));
fl64.l_whence = SEEK_CUR;
fl64.l_start = 0;
fl64.l_len = len64;
/* lockf is always relative to the current file position. */
fl.l_whence = SEEK_CUR;
fl.l_start = 0;
fl.l_len = len;
#endif
#ifdef __NR_fcntl64
# if __ASSUME_FCNTL64 == 0
if (!__have_no_fcntl64)
{
# endif
memset ((char *) &fl64, '\0', sizeof (fl64));
fl64.l_whence = SEEK_CUR;
fl64.l_start = 0;
fl64.l_len = len64;
# if __ASSUME_FCNTL64 == 0
}
# endif
#endif
#if __ASSUME_FCNTL64 == 0 && !defined __NR_fcntl64
if (len64 != (off64_t) len)
{
/* We can't represent the length. */
__set_errno (EOVERFLOW);
return -1;
}
#endif
switch (cmd)
{
case F_TEST:
/* Test the lock: return 0 if FD is unlocked or locked by this process;
return -1, set errno to EACCES, if another process holds the lock. */
#if __ASSUME_FCNTL64 > 0
fl64.l_type = F_RDLCK;
if (INLINE_SYSCALL (fcntl64, 3, fd, F_GETLK64, &fl64) < 0)
return -1;
@ -90,104 +47,22 @@ lockf64 (int fd, int cmd, off64_t len64)
return 0;
__set_errno (EACCES);
return -1;
#else
# ifdef __NR_fcntl64
if (!__have_no_fcntl64)
{
int res;
fl64.l_type = F_RDLCK;
res = INLINE_SYSCALL (fcntl64, 3, fd, F_GETLK64, &fl64);
/* If errno == ENOSYS try the 32bit interface if len64 can
be represented with 32 bits. */
if (res == 0)
{
if (fl64.l_type == F_UNLCK || fl64.l_pid == __getpid ())
return 0;
__set_errno (EACCES);
return -1;
}
else if (errno == ENOSYS)
__have_no_fcntl64 = 1;
else
/* res < 0 && errno != ENOSYS. */
return -1;
if (len64 != (off64_t) len)
{
/* We can't represent the length. */
__set_errno (EOVERFLOW);
return -1;
}
}
# endif
fl.l_type = F_RDLCK;
if (__fcntl (fd, F_GETLK, &fl) < 0)
return -1;
if (fl.l_type == F_UNLCK || fl.l_pid == __getpid ())
return 0;
__set_errno (EACCES);
return -1;
#endif
case F_ULOCK:
#if __ASSUME_FCNTL64 == 0
fl.l_type = F_UNLCK;
cmd = F_SETLK;
#endif
#ifdef __NR_fcntl64
fl64.l_type = F_UNLCK;
cmd64 = F_SETLK64;
#endif
break;
case F_LOCK:
#if __ASSUME_FCNTL64 == 0
fl.l_type = F_WRLCK;
cmd = F_SETLKW;
#endif
#ifdef __NR_fcntl64
fl64.l_type = F_WRLCK;
cmd64 = F_SETLKW64;
#endif
break;
case F_TLOCK:
#if __ASSUME_FCNTL64 == 0
fl.l_type = F_WRLCK;
cmd = F_SETLK;
#endif
#ifdef __NR_fcntl64
fl64.l_type = F_WRLCK;
cmd64 = F_SETLK64;
#endif
break;
default:
__set_errno (EINVAL);
return -1;
}
#if __ASSUME_FCNTL64 > 0
return INLINE_SYSCALL (fcntl64, 3, fd, cmd64, &fl64);
#else
# ifdef __NR_fcntl64
if (!__have_no_fcntl64)
{
int res = INLINE_SYSCALL (fcntl64, 3, fd, cmd64, &fl64);
/* If errno == ENOSYS try the 32bit interface if len64 can
be represented with 32 bits. */
if (res == 0 || errno != ENOSYS)
return res;
__have_no_fcntl64 = 1;
if (len64 != (off64_t) len)
{
/* We can't represent the length. */
__set_errno (EOVERFLOW);
return -1;
}
}
# endif
return __fcntl (fd, cmd, &fl);
#endif
}

14
sysdeps/unix/sysv/linux/kernel-features.h
View file

@ -82,20 +82,6 @@
# define __ASSUME_ST_INO_64_BIT 1
#endif
/* To support locking of large files a new fcntl() syscall was introduced
in 2.4.0-test7. */
#if defined __i386__ || defined __sparc__
# define __ASSUME_FCNTL64 1
#endif
/* Arm got fcntl64 in 2.4.4, PowerPC and SH have it also in 2.4.4 (I
don't know when it got introduced). But PowerPC64 does not support
separate FCNTL64 call, FCNTL is already 64-bit */
#if (defined __powerpc__ || defined __sh__) \
&& !defined __powerpc64__
# define __ASSUME_FCNTL64 1
#endif
/* The getdents64 syscall was introduced in 2.4.0-test7 (but later for
MIPS n32). */
#define __ASSUME_GETDENTS64_SYSCALL 1