diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/arm/mmap.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/arm/mmap.S | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/mmap.S b/sysdeps/unix/sysv/linux/arm/mmap.S deleted file mode 100644 index cf6f253378..0000000000 --- a/sysdeps/unix/sysv/linux/arm/mmap.S +++ /dev/null @@ -1,92 +0,0 @@ -/* Copyright (C) 1998, 2000, 2003 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 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 <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]! - ldr r5, [sp, #8] - str r4, [sp, #-4]! - ldr r4, [sp, #8] - - /* convert offset to pages */ - movs ip, r5, lsl #20 - bne .Linval - mov r5, r5, lsr #12 - - /* do the syscall */ - swi SYS_ify (mmap2) - - /* restore registers */ -2: - ldr r4, [sp], #4 - ldr r5, [sp], #4 - - cmn r0, $4096 - RETINSTR(cc, lr) - b PLTJMP(syscall_error) - -.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} - - /* do the syscall */ - mov a1, sp - swi SYS_ify (mmap) - - /* pop args off the stack. */ - add sp, sp, #16 - - cmn r0, $4096 - RETINSTR(cc, lr) - b PLTJMP(syscall_error); -#endif - -PSEUDO_END (__mmap) - -weak_alias (__mmap, mmap) |