diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/mips/pread64.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/mips/pread64.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/mips/pread64.c b/sysdeps/unix/sysv/linux/mips/pread64.c new file mode 100644 index 0000000000..d8763acabb --- /dev/null +++ b/sysdeps/unix/sysv/linux/mips/pread64.c @@ -0,0 +1,107 @@ +/* Copyright (C) 1997, 1998, 2000, 2002, 2003, 2004 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + 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 <errno.h> +#ifndef NO_SGIDEFS_H +#include <sgidefs.h> +#endif +#include <unistd.h> +#include <endian.h> + +#include <sysdep-cancel.h> +#include <sys/syscall.h> +#include <bp-checks.h> + +#include <kernel-features.h> + +#ifdef __NR_pread64 /* Newer kernels renamed but it's the same. */ +# ifdef __NR_pread +# error "__NR_pread and __NR_pread64 both defined???" +# endif +# define __NR_pread __NR_pread64 +#endif + +#if defined __NR_pread || __ASSUME_PREAD_SYSCALL > 0 + +# if __ASSUME_PREAD_SYSCALL == 0 +static ssize_t __emulate_pread64 (int fd, void *buf, size_t count, + off64_t offset) internal_function; +# endif + +ssize_t +__libc_pread64 (fd, buf, count, offset) + int fd; + void *buf; + size_t count; + off64_t offset; +{ + ssize_t result; + + + if (SINGLE_THREAD_P) + { + /* First try the syscall. */ +#if _MIPS_SIM == _ABIN32 || _MIPS_SIM == _ABI64 + result = INLINE_SYSCALL (pread, 4, fd, CHECK_N (buf, count), count, + offset); +#else + result = INLINE_SYSCALL (pread, 6, fd, CHECK_N (buf, count), count, 0, + __LONG_LONG_PAIR ((off_t) (offset >> 32), + (off_t) (offset & 0xffffffff))); +#endif +# if __ASSUME_PREAD_SYSCALL == 0 + if (result == -1 && errno == ENOSYS) + /* No system call available. Use the emulation. */ + result = __emulate_pread64 (fd, buf, count, offset); +# endif + return result; + } + + int oldtype = LIBC_CANCEL_ASYNC (); + + /* First try the syscall. */ +#if _MIPS_SIM == _ABIN32 || _MIPS_SIM == _ABI64 + result = INLINE_SYSCALL (pread, 4, fd, CHECK_N (buf, count), count, offset); +#else + result = INLINE_SYSCALL (pread, 6, fd, CHECK_N (buf, count), count, 0, + __LONG_LONG_PAIR ((off_t) (offset >> 32), + (off_t) (offset & 0xffffffff))); +#endif +# if __ASSUME_PREAD_SYSCALL == 0 + if (result == -1 && errno == ENOSYS) + /* No system call available. Use the emulation. */ + result = __emulate_pread64 (fd, buf, count, offset); +# endif + + LIBC_CANCEL_RESET (oldtype); + + return result; +} + +weak_alias (__libc_pread64, __pread64) +weak_alias (__libc_pread64, pread64) + +# define __libc_pread64(fd, buf, count, offset) \ + static internal_function __emulate_pread64 (fd, buf, count, offset) +#endif + +#if __ASSUME_PREAD_SYSCALL == 0 +# include <sysdeps/posix/pread64.c> +#endif |