2 * Compat system call wrappers
4 * Copyright (C) 2012 ARM Ltd.
5 * Authors: Will Deacon <will.deacon@arm.com>
6 * Catalin Marinas <catalin.marinas@arm.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include <linux/linkage.h>
23 #include <asm/assembler.h>
24 #include <asm/asm-offsets.h>
27 * System call wrappers for the AArch32 compatibility layer.
30 compat_sys_sigreturn_wrapper:
32 mov x27, #0 // prevent syscall restart handling (why)
33 b compat_sys_sigreturn
34 ENDPROC(compat_sys_sigreturn_wrapper)
36 compat_sys_rt_sigreturn_wrapper:
38 mov x27, #0 // prevent syscall restart handling (why)
39 b compat_sys_rt_sigreturn
40 ENDPROC(compat_sys_rt_sigreturn_wrapper)
42 compat_sys_statfs64_wrapper:
47 ENDPROC(compat_sys_statfs64_wrapper)
49 compat_sys_fstatfs64_wrapper:
53 b compat_sys_fstatfs64
54 ENDPROC(compat_sys_fstatfs64_wrapper)
57 * Wrappers for AArch32 syscalls that either take 64-bit parameters
58 * in registers or that take 32-bit parameters which require sign
61 compat_sys_lseek_wrapper:
64 ENDPROC(compat_sys_lseek_wrapper)
66 compat_sys_pread64_wrapper:
67 orr x3, x4, x5, lsl #32
69 ENDPROC(compat_sys_pread64_wrapper)
71 compat_sys_pwrite64_wrapper:
72 orr x3, x4, x5, lsl #32
74 ENDPROC(compat_sys_pwrite64_wrapper)
76 compat_sys_truncate64_wrapper:
77 orr x1, x2, x3, lsl #32
79 ENDPROC(compat_sys_truncate64_wrapper)
81 compat_sys_ftruncate64_wrapper:
82 orr x1, x2, x3, lsl #32
84 ENDPROC(compat_sys_ftruncate64_wrapper)
86 compat_sys_readahead_wrapper:
87 orr x1, x2, x3, lsl #32
90 ENDPROC(compat_sys_readahead_wrapper)
92 compat_sys_lookup_dcookie:
93 orr x0, x0, x1, lsl #32
97 ENDPROC(compat_sys_lookup_dcookie)
99 compat_sys_fadvise64_64_wrapper:
101 orr x1, x2, x3, lsl #32
102 orr x2, x4, x5, lsl #32
105 ENDPROC(compat_sys_fadvise64_64_wrapper)
107 compat_sys_sync_file_range2_wrapper:
108 orr x2, x2, x3, lsl #32
109 orr x3, x4, x5, lsl #32
110 b sys_sync_file_range2
111 ENDPROC(compat_sys_sync_file_range2_wrapper)
113 compat_sys_fallocate_wrapper:
114 orr x2, x2, x3, lsl #32
115 orr x3, x4, x5, lsl #32
117 ENDPROC(compat_sys_fallocate_wrapper)
119 compat_sys_fanotify_mark_wrapper:
120 orr x2, x2, x3, lsl #32
124 ENDPROC(compat_sys_fanotify_mark_wrapper)
127 #define __SYSCALL(x, y) .quad y // x
130 * The system calls table must be 4KB aligned.
133 ENTRY(compat_sys_call_table)
134 #include <asm/unistd32.h>