Remove compatibility code for old ARM kernels.

[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / arm / mmap.S

diff --git a/sysdeps/unix/sysv/linux/arm/mmap.S b/sysdeps/unix/sysv/linux/arm/mmap.S
index 62bf8ee1f8433c27e022370488ce2c66f89faced..3276a3b4750493b151a587a70c3ac1354acec004 100644 (file)
--- a/sysdeps/unix/sysv/linux/arm/mmap.S
+++ b/sysdeps/unix/sysv/linux/arm/mmap.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 1998, 2000, 2003, 2005, 2009 Free Software Foundation, Inc.
+/* Copyright (C) 1998-2012 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
@@ -16,20 +16,12 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <sysdep.h>
-#include <kernel-features.h>
 
 #define        EINVAL          22
 
        .text
 
 ENTRY (__mmap)
-# ifdef __ASSUME_MMAP2_SYSCALL
-       /* This code is actually a couple of cycles slower than the
-          sys_mmap version below, so it might seem like a loss.  But the
-          code path inside the kernel is sufficiently much shorter to
-          make it a net gain to use mmap2 when it's known to be
-          available.  */
-
        /* shuffle args */
        str     r5, [sp, #-4]!
        cfi_adjust_cfa_offset (4)
@@ -66,38 +58,6 @@ ENTRY (__mmap)
 .Linval:
        mov     r0, #-EINVAL
        b       2b
-# else
-       /* Because we can only get five args through the syscall interface, and
-          mmap() takes six, we need to build a parameter block and pass its
-          address instead.  The 386 port does a similar trick.  */
-
-       /* This code previously moved sp into ip and stored the args using
-          stmdb ip!, {a1-a4}.  It did not modify sp, so the stack never had
-          to be restored after the syscall completed.  It saved an
-          instruction and meant no stack cleanup work was required.
-
-          This will not work in the case of a mmap call being interrupted
-          by a signal.  If the signal handler uses any stack the arguments
-          to mmap will be trashed.  The results of a restart of mmap are
-          then unpredictable. */
-
-       /* store args on the stack */
-       stmdb   sp!, {a1-a4}
-       cfi_adjust_cfa_offset (16)
-
-       /* do the syscall */
-       mov     a1, sp
-       DO_CALL (mmap, 0)
-
-       /* pop args off the stack. */
-       add     sp, sp, #16
-       cfi_adjust_cfa_offset (-16)
-
-       cmn     r0, $4096
-       RETINSTR(cc, lr)
-       b       PLTJMP(syscall_error);
-#endif
-
 PSEUDO_END (__mmap)
 
 weak_alias (__mmap, mmap)