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Diffstat (limited to 'sysdeps/unix/sysv/linux/mips/pread.c')
-rw-r--r--sysdeps/unix/sysv/linux/mips/pread.c109
1 files changed, 109 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/mips/pread.c b/sysdeps/unix/sysv/linux/mips/pread.c
new file mode 100644
index 0000000000..eff7d473d0
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/pread.c
@@ -0,0 +1,109 @@
+/* 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 <assert.h>
+#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_pread (int fd, void *buf, size_t count,
+ off_t offset) internal_function;
+# endif
+
+ssize_t
+__libc_pread (fd, buf, count, offset)
+ int fd;
+ void *buf;
+ size_t count;
+ off_t offset;
+{
+ ssize_t result;
+
+#if _MIPS_SIM != _ABI64
+ assert (sizeof (offset) == 4);
+#endif
+
+ 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 (offset >> 31, offset));
+#endif
+# if __ASSUME_PREAD_SYSCALL == 0
+ if (result == -1 && errno == ENOSYS)
+ /* No system call available. Use the emulation. */
+ result = __emulate_pread (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 (offset >> 31, offset));
+#endif
+# if __ASSUME_PREAD_SYSCALL == 0
+ if (result == -1 && errno == ENOSYS)
+ /* No system call available. Use the emulation. */
+ result = __emulate_pread (fd, buf, count, offset);
+# endif
+
+ LIBC_CANCEL_RESET (oldtype);
+
+ return result;
+}
+
+strong_alias (__libc_pread, __pread)
+weak_alias (__libc_pread, pread)
+
+# define __libc_pread(fd, buf, count, offset) \
+ static internal_function __emulate_pread (fd, buf, count, offset)
+#endif
+
+#if __ASSUME_PREAD_SYSCALL == 0
+# include <sysdeps/posix/pread.c>
+#endif