Update.

	* sysdeps/unix/sysv/linux/getrlimit.c: Remove K&R compatibility.

	* sysdeps/unix/sysv/linux/kernel-features.h: Define
	__ASSUME_TRUNCATE64_SYSCALL and __ASSUME_MMAP2_SYSCALL for 2.3.31
	on x86.
	* sysdeps/unix/sysv/linux/ftruncate64.c: New file.
	* sysdeps/unix/sysv/linux/truncate64.c: New file.
	* sysdeps/unix/sysv/linux/i386/mmap.S: Allow using mmap2.
	* sysdeps/unix/sysv/linux/i386/mmap64.S: New file.

6 files changed, 316 insertions, 6 deletions

diff --git a/sysdeps/unix/sysv/linux/ftruncate64.c b/sysdeps/unix/sysv/linux/ftruncate64.c
new file mode 100644
index 0000000000..17a5ab0288
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ftruncate64.c
@@ -0,0 +1,70 @@
+/* Copyright (C) 1997, 1998, 1999 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
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <sys/types.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <sysdep.h>
+#include <sys/syscall.h>
+
+#include "kernel-features.h"
+
+#ifdef __NR_ftruncate64
+static int have_no_ftruncate64;
+
+extern int __syscall_ftruncate64 (int fd, int high_length, int low_length);
+
+
+/* Truncate the file FD refers to to LENGTH bytes.  */
+int
+ftruncate64 (fd, length)
+     int fd;
+     off64_t length;
+{
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+  if (! have_no_ftruncate64)
+#endif
+    {
+      int result = INLINE_SYSCALL (ftruncate64, 3, fd, length >> 32,
+				   length & 0xffffffff);
+
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+      if (result != -1 || errno != ENOSYS)
+#endif
+	return result;
+
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+      have_no_ftruncate64 = 1;
+#endif
+    }
+
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+  if ((off_t) length != length)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+  return __ftruncate (fd, (off_t) length);
+#endif
+}
+
+#else
+/* Use the generic implementation.  */
+# include <sysdeps/generic/ftruncate64.c>
+#endif
diff --git a/sysdeps/unix/sysv/linux/getrlimit.c b/sysdeps/unix/sysv/linux/getrlimit.c
index a929030d2a..14a879c5df 100644
--- a/sysdeps/unix/sysv/linux/getrlimit.c
+++ b/sysdeps/unix/sysv/linux/getrlimit.c
@@ -24,10 +24,9 @@
 
 #include "kernel-features.h"
 
-extern int __syscall_ugetrlimit __P ((unsigned int resource,
-				      struct rlimit *rlimits));
-extern int __syscall_getrlimit __P ((unsigned int resource,
-				     struct rlimit *rlimits));
+extern int __syscall_ugetrlimit (unsigned int resource,
+				 struct rlimit *rlimits);
+extern int __syscall_getrlimit (unsigned int resource, struct rlimit *rlimits);
 
 /* Linux 2.3.25 introduced a new system call since the types used for
    the limits are now unsigned.  */
diff --git a/sysdeps/unix/sysv/linux/i386/mmap.S b/sysdeps/unix/sysv/linux/i386/mmap.S
index a9929c8be1..0397f841f1 100644
--- a/sysdeps/unix/sysv/linux/i386/mmap.S
+++ b/sysdeps/unix/sysv/linux/i386/mmap.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
+/* Copyright (C) 1995, 1996, 1997, 1998, 1999 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
@@ -18,10 +18,45 @@
 
 #include <sysdep.h>
 
+#include "kernel-features.h"
+
+#define EINVAL	22
+
 	.text
 
 ENTRY (__mmap)
 
+/* I don't think it is worthwhile trzing to use mmap2 whenever it
+   is available.  Only use it when we are sure the syscall exists.  */
+#ifdef __ASSUME_MMAP2_SYSCALL
+
+	/* Save registers.  */
+	pushl %ebp
+	pushl %ebx
+	pushl %esi
+	pushl %edi
+
+	movl $SYS_ify(mmap2), %eax	/* System call number in %eax.  */
+
+	movl 20(%esp), %ebx
+	movl 24(%esp), %ecx
+	movl 28(%esp), %edx
+	movl 32(%esp), %esi
+	movl 36(%esp), %edi
+	movl 40(%esp), %ebp
+	shrl $12, %ebp			/* mmap2 takes the offset in pages.  */
+
+	/* Do the system call trap.  */
+	int $0x80
+
+	/* Restore registers.  */
+	popl %edi
+	popl %esi
+	popl %ebx
+	popl %ebp
+
+#else
+
 	/* Save registers.  */
 	movl %ebx, %edx
 
@@ -35,6 +70,8 @@ ENTRY (__mmap)
 	/* Restore registers.  */
 	movl %edx, %ebx
 
+#endif
+
 	/* If 0 > %eax > -4096 there was an error.  */
 	cmpl $-4096, %eax
 	ja SYSCALL_ERROR_LABEL
@@ -46,4 +83,3 @@ L(pseudo_end):
 PSEUDO_END (__mmap)
 
 weak_alias (__mmap, mmap)
-weak_alias (__mmap, mmap64)
diff --git a/sysdeps/unix/sysv/linux/i386/mmap64.S b/sysdeps/unix/sysv/linux/i386/mmap64.S
new file mode 100644
index 0000000000..075c3f3345
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/i386/mmap64.S
@@ -0,0 +1,125 @@
+/* Copyright (C) 1995, 1996, 1997, 1998, 1999 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
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <sysdep.h>
+
+#include "kernel-features.h"
+
+#define EINVAL	22
+	
+	.text
+
+ENTRY (__mmap64)
+
+#ifdef __NR_mmap2
+
+	/* Save registers.  */
+	pushl %ebp
+	pushl %ebx
+	pushl %esi
+	pushl %edi
+
+	movl $SYS_ify(mmap2), %eax	/* System call number in %eax.  */
+
+	movl 40(%esp), %ebp
+	movl 44(%esp), %ecx
+	shrld $12, %ecx, %ebp		/* mmap2 takes the offset in pages.  */
+	shrl $12, %ecx
+	jne L(einval)
+
+	movl 20(%esp), %ebx
+	movl 24(%esp), %ecx
+	movl 28(%esp), %edx
+	movl 32(%esp), %esi
+	movl 36(%esp), %edi
+
+	/* Do the system call trap.  */
+L(do_syscal):
+	int $0x80
+
+	/* If 0 > %eax > -4096 there was an error.  */
+	cmpl $-4096, %eax
+	ja SYSCALL_ERROR_LABEL
+
+	/* Restore registers.  */
+	popl %edi
+	popl %esi
+	popl %ebx
+	popl %ebp
+
+	/* Successful; return the syscall's value.  */
+L(pseudo_end):
+	ret
+
+#ifndef __ASSUME_MMAP2_SYSCALL
+2:
+	cmp $-EINVAL, %eax
+	je 2f
+#endif
+
+	/* This means the offset value is too large.  */
+L(einval):
+	popl %edi
+	popl %esi
+	popl %ebx
+	popl %ebp
+	movl $-EINVAL, %eax
+	jmp SYSCALL_ERROR_LABEL
+#endif
+
+#if !defined __ASSUME_MMAP2_SYSCALL || !defined __NR_mmap2
+
+# ifndef __NR_mmap2
+	/* Save registers.  */
+	movl %ebx, %edx
+# endif
+
+	cmpl $0, 44(%esp)
+	jne L(einval)
+
+	movl $SYS_ify(mmap), %eax	/* System call number in %eax.  */
+
+	lea 4(%esp), %ebx		/* Address of args is 1st arg.  */
+
+# ifdef __NR_mmap2
+	jmp L(do_syscall)
+# else
+
+	/* Do the system call trap.  */
+	int $0x80
+
+	/* Restore registers.  */
+	movl %edx, %ebx
+
+	/* If 0 > %eax > -4096 there was an error.  */
+	cmpl $-4096, %eax
+	ja SYSCALL_ERROR_LABEL
+
+	/* Successful; return the syscall's value.  */
+L(pseudo_end):
+	ret
+
+L(einval):
+	movl $-EINVAL, %eax
+	jmp SYSCALL_ERROR_LABEL
+# endif
+#endif
+
+PSEUDO_END (__mmap64)
+
+weak_alias (__mmap64, mmap64)
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h
index f01f2ddaca..b11dc4cce0 100644
--- a/sysdeps/unix/sysv/linux/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/kernel-features.h
@@ -79,3 +79,13 @@
 #if __LINUX_KERNEL_VERSION >= 131865 && defined __i386__
 # define __ASSUME_NEW_GETRLIMIT_SYSCALL	1
 #endif
+
+/* On x86 the truncate64/ftruncate64 syscalls were introduced in 2.3.31.  */
+#if __LINUX_KERNEL_VERSION >= 131871 && defined __i386__
+# define __ASSUME_TRUNCATE64_SYSCALL	1
+#endif
+
+/* On x86 the truncate64/ftruncate64 syscalls were introduced in 2.3.31.  */
+#if __LINUX_KERNEL_VERSION >= 131871 && defined __i386__
+# define __ASSUME_MMAP2_SYSCALL	1
+#endif
diff --git a/sysdeps/unix/sysv/linux/truncate64.c b/sysdeps/unix/sysv/linux/truncate64.c
new file mode 100644
index 0000000000..0a20547789
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/truncate64.c
@@ -0,0 +1,70 @@
+/* Copyright (C) 1997, 1998, 1999 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
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <sys/types.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <sysdep.h>
+#include <sys/syscall.h>
+
+#include "kernel-features.h"
+
+#ifdef __NR_truncate64
+static int have_no_truncate64;
+
+extern int __syscall_truncate64 (int fd, int high_length, int low_length);
+
+
+/* Truncate the file FD refers to to LENGTH bytes.  */
+int
+truncate64 (path, length)
+     const char *path;
+     off64_t length;
+{
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+  if (! have_no_truncate64)
+#endif
+    {
+      int result = INLINE_SYSCALL (truncate64, 3, path, length >> 32,
+				   length & 0xffffffff);
+
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+      if (result != -1 || errno != ENOSYS)
+#endif
+	return result;
+
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+      have_no_truncate64 = 1;
+#endif
+    }
+
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+  if ((off_t) length != length)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+  return truncate (path, (off_t) length);
+#endif
+}
+
+#else
+/* Use the generic implementation.  */
+# include <sysdeps/generic/truncate64.c>
+#endif