projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 3dd681d9 WD |
1 | /* |
| 2 | * Compat system call wrappers | |
| 3 | * | |
| 4 | * Copyright (C) 2012 ARM Ltd. | |
| 5 | * Authors: Will Deacon <will.deacon@arm.com> | |
| 6 | * Catalin Marinas <catalin.marinas@arm.com> | |
| 7 | * | |
| 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. | |
| 11 | * | |
| 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. | |
| 16 | * | |
| 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/>. | |
| 19 | */ | |
| 20 | ||
| 21 | #include <linux/linkage.h> | |
| 18ccb0ca | 22 | #include <linux/const.h> |
| 3dd681d9 WD |
23 | |
| 24 | #include <asm/assembler.h> | |
| 25 | #include <asm/asm-offsets.h> | |
| 18ccb0ca AS |
26 | #include <asm/errno.h> |
| 27 | #include <asm/page.h> | |
| 3dd681d9 WD |
28 | |
| 29 | /* | |
| 30 | * System call wrappers for the AArch32 compatibility layer. | |
| 31 | */ | |
| 3dd681d9 | 32 | |
| 0156411b | 33 | ENTRY(compat_sys_sigreturn_wrapper) |
| 3dd681d9 | 34 | mov x0, sp |
| 3dd681d9 WD |
35 | b compat_sys_sigreturn |
| 36 | ENDPROC(compat_sys_sigreturn_wrapper) | |
| 37 | ||
| 0156411b | 38 | ENTRY(compat_sys_rt_sigreturn_wrapper) |
| 3dd681d9 | 39 | mov x0, sp |
| 3dd681d9 WD |
40 | b compat_sys_rt_sigreturn |
| 41 | ENDPROC(compat_sys_rt_sigreturn_wrapper) | |
| 42 | ||
| 0156411b | 43 | ENTRY(compat_sys_statfs64_wrapper) |
| 3dd681d9 WD |
44 | mov w3, #84 |
| 45 | cmp w1, #88 | |
| 46 | csel w1, w3, w1, eq | |
| 47 | b compat_sys_statfs64 | |
| 48 | ENDPROC(compat_sys_statfs64_wrapper) | |
| 49 | ||
| 0156411b | 50 | ENTRY(compat_sys_fstatfs64_wrapper) |
| 3dd681d9 WD |
51 | mov w3, #84 |
| 52 | cmp w1, #88 | |
| 53 | csel w1, w3, w1, eq | |
| 54 | b compat_sys_fstatfs64 | |
| 55 | ENDPROC(compat_sys_fstatfs64_wrapper) | |
| 56 | ||
| 18ccb0ca AS |
57 | /* |
| 58 | * Note: off_4k (w5) is always in units of 4K. If we can't do the | |
| 59 | * requested offset because it is not page-aligned, we return -EINVAL. | |
| 60 | */ | |
| 61 | ENTRY(compat_sys_mmap2_wrapper) | |
| 62 | #if PAGE_SHIFT > 12 | |
| 63 | tst w5, #~PAGE_MASK >> 12 | |
| 64 | b.ne 1f | |
| 65 | lsr w5, w5, #PAGE_SHIFT - 12 | |
| 66 | #endif | |
| 67 | b sys_mmap_pgoff | |
| 68 | 1: mov x0, #-EINVAL | |
| 69 | ret | |
| 70 | ENDPROC(compat_sys_mmap2_wrapper) | |
| 71 | ||
| 3dd681d9 WD |
72 | /* |
| 73 | * Wrappers for AArch32 syscalls that either take 64-bit parameters | |
| 74 | * in registers or that take 32-bit parameters which require sign | |
| 75 | * extension. | |
| 76 | */ | |
| 0156411b | 77 | ENTRY(compat_sys_pread64_wrapper) |
| 55b89540 | 78 | regs_to_64 x3, x4, x5 |
| 3dd681d9 WD |
79 | b sys_pread64 |
| 80 | ENDPROC(compat_sys_pread64_wrapper) | |
| 81 | ||
| 0156411b | 82 | ENTRY(compat_sys_pwrite64_wrapper) |
| 55b89540 | 83 | regs_to_64 x3, x4, x5 |
| 3dd681d9 WD |
84 | b sys_pwrite64 |
| 85 | ENDPROC(compat_sys_pwrite64_wrapper) | |
| 86 | ||
| 0156411b | 87 | ENTRY(compat_sys_truncate64_wrapper) |
| 55b89540 | 88 | regs_to_64 x1, x2, x3 |
| 3dd681d9 WD |
89 | b sys_truncate |
| 90 | ENDPROC(compat_sys_truncate64_wrapper) | |
| 91 | ||
| 0156411b | 92 | ENTRY(compat_sys_ftruncate64_wrapper) |
| 55b89540 | 93 | regs_to_64 x1, x2, x3 |
| 3dd681d9 WD |
94 | b sys_ftruncate |
| 95 | ENDPROC(compat_sys_ftruncate64_wrapper) | |
| 96 | ||
| 0156411b | 97 | ENTRY(compat_sys_readahead_wrapper) |
| 55b89540 | 98 | regs_to_64 x1, x2, x3 |
| 3dd681d9 WD |
99 | mov w2, w4 |
| 100 | b sys_readahead | |
| 101 | ENDPROC(compat_sys_readahead_wrapper) | |
| 102 | ||
| 0156411b | 103 | ENTRY(compat_sys_fadvise64_64_wrapper) |
| 3dd681d9 | 104 | mov w6, w1 |
| 55b89540 ML |
105 | regs_to_64 x1, x2, x3 |
| 106 | regs_to_64 x2, x4, x5 | |
| 3dd681d9 WD |
107 | mov w3, w6 |
| 108 | b sys_fadvise64_64 | |
| 109 | ENDPROC(compat_sys_fadvise64_64_wrapper) | |
| 110 | ||
| 0156411b | 111 | ENTRY(compat_sys_sync_file_range2_wrapper) |
| 55b89540 ML |
112 | regs_to_64 x2, x2, x3 |
| 113 | regs_to_64 x3, x4, x5 | |
| 3dd681d9 WD |
114 | b sys_sync_file_range2 |
| 115 | ENDPROC(compat_sys_sync_file_range2_wrapper) | |
| 116 | ||
| 0156411b | 117 | ENTRY(compat_sys_fallocate_wrapper) |
| 55b89540 ML |
118 | regs_to_64 x2, x2, x3 |
| 119 | regs_to_64 x3, x4, x5 | |
| 3dd681d9 WD |
120 | b sys_fallocate |
| 121 | ENDPROC(compat_sys_fallocate_wrapper) |