159 строки
3.6 KiB
ArmAsm
159 строки
3.6 KiB
ArmAsm
/*
|
|
* Compat system call wrappers
|
|
*
|
|
* Copyright (C) 2012 ARM Ltd.
|
|
* Authors: Will Deacon <will.deacon@arm.com>
|
|
* Catalin Marinas <catalin.marinas@arm.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
#include <asm/assembler.h>
|
|
#include <asm/asm-offsets.h>
|
|
|
|
/*
|
|
* System call wrappers for the AArch32 compatibility layer.
|
|
*/
|
|
compat_sys_fork_wrapper:
|
|
mov x0, sp
|
|
b compat_sys_fork
|
|
ENDPROC(compat_sys_fork_wrapper)
|
|
|
|
compat_sys_vfork_wrapper:
|
|
mov x0, sp
|
|
b compat_sys_vfork
|
|
ENDPROC(compat_sys_vfork_wrapper)
|
|
|
|
compat_sys_execve_wrapper:
|
|
mov x3, sp
|
|
b compat_sys_execve
|
|
ENDPROC(compat_sys_execve_wrapper)
|
|
|
|
compat_sys_clone_wrapper:
|
|
mov x5, sp
|
|
b compat_sys_clone
|
|
ENDPROC(compat_sys_clone_wrapper)
|
|
|
|
compat_sys_sigreturn_wrapper:
|
|
mov x0, sp
|
|
mov x27, #0 // prevent syscall restart handling (why)
|
|
b compat_sys_sigreturn
|
|
ENDPROC(compat_sys_sigreturn_wrapper)
|
|
|
|
compat_sys_rt_sigreturn_wrapper:
|
|
mov x0, sp
|
|
mov x27, #0 // prevent syscall restart handling (why)
|
|
b compat_sys_rt_sigreturn
|
|
ENDPROC(compat_sys_rt_sigreturn_wrapper)
|
|
|
|
compat_sys_sigaltstack_wrapper:
|
|
ldr x2, [sp, #S_COMPAT_SP]
|
|
b compat_do_sigaltstack
|
|
ENDPROC(compat_sys_sigaltstack_wrapper)
|
|
|
|
compat_sys_statfs64_wrapper:
|
|
mov w3, #84
|
|
cmp w1, #88
|
|
csel w1, w3, w1, eq
|
|
b compat_sys_statfs64
|
|
ENDPROC(compat_sys_statfs64_wrapper)
|
|
|
|
compat_sys_fstatfs64_wrapper:
|
|
mov w3, #84
|
|
cmp w1, #88
|
|
csel w1, w3, w1, eq
|
|
b compat_sys_fstatfs64
|
|
ENDPROC(compat_sys_fstatfs64_wrapper)
|
|
|
|
/*
|
|
* Wrappers for AArch32 syscalls that either take 64-bit parameters
|
|
* in registers or that take 32-bit parameters which require sign
|
|
* extension.
|
|
*/
|
|
compat_sys_lseek_wrapper:
|
|
sxtw x1, w1
|
|
b sys_lseek
|
|
ENDPROC(compat_sys_lseek_wrapper)
|
|
|
|
compat_sys_pread64_wrapper:
|
|
orr x3, x4, x5, lsl #32
|
|
b sys_pread64
|
|
ENDPROC(compat_sys_pread64_wrapper)
|
|
|
|
compat_sys_pwrite64_wrapper:
|
|
orr x3, x4, x5, lsl #32
|
|
b sys_pwrite64
|
|
ENDPROC(compat_sys_pwrite64_wrapper)
|
|
|
|
compat_sys_truncate64_wrapper:
|
|
orr x1, x2, x3, lsl #32
|
|
b sys_truncate
|
|
ENDPROC(compat_sys_truncate64_wrapper)
|
|
|
|
compat_sys_ftruncate64_wrapper:
|
|
orr x1, x2, x3, lsl #32
|
|
b sys_ftruncate
|
|
ENDPROC(compat_sys_ftruncate64_wrapper)
|
|
|
|
compat_sys_readahead_wrapper:
|
|
orr x1, x2, x3, lsl #32
|
|
mov w2, w4
|
|
b sys_readahead
|
|
ENDPROC(compat_sys_readahead_wrapper)
|
|
|
|
compat_sys_lookup_dcookie:
|
|
orr x0, x0, x1, lsl #32
|
|
mov w1, w2
|
|
mov w2, w3
|
|
b sys_lookup_dcookie
|
|
ENDPROC(compat_sys_lookup_dcookie)
|
|
|
|
compat_sys_fadvise64_64_wrapper:
|
|
mov w6, w1
|
|
orr x1, x2, x3, lsl #32
|
|
orr x2, x4, x5, lsl #32
|
|
mov w3, w6
|
|
b sys_fadvise64_64
|
|
ENDPROC(compat_sys_fadvise64_64_wrapper)
|
|
|
|
compat_sys_sync_file_range2_wrapper:
|
|
orr x2, x2, x3, lsl #32
|
|
orr x3, x4, x5, lsl #32
|
|
b sys_sync_file_range2
|
|
ENDPROC(compat_sys_sync_file_range2_wrapper)
|
|
|
|
compat_sys_fallocate_wrapper:
|
|
orr x2, x2, x3, lsl #32
|
|
orr x3, x4, x5, lsl #32
|
|
b sys_fallocate
|
|
ENDPROC(compat_sys_fallocate_wrapper)
|
|
|
|
compat_sys_fanotify_mark_wrapper:
|
|
orr x2, x2, x3, lsl #32
|
|
mov w3, w4
|
|
mov w4, w5
|
|
b sys_fanotify_mark
|
|
ENDPROC(compat_sys_fanotify_mark_wrapper)
|
|
|
|
#undef __SYSCALL
|
|
#define __SYSCALL(x, y) .quad y // x
|
|
|
|
/*
|
|
* The system calls table must be 4KB aligned.
|
|
*/
|
|
.align 12
|
|
ENTRY(compat_sys_call_table)
|
|
#include <asm/unistd32.h>
|