|
22 | 22 | */ |
23 | 23 | #define __COMPAT_SYSCALL_NR |
24 | 24 |
|
| 25 | +#include <linux/compat.h> |
25 | 26 | #include <linux/compiler.h> |
26 | 27 | #include <linux/syscalls.h> |
27 | 28 |
|
28 | 29 | #include <asm/syscall.h> |
29 | 30 |
|
30 | 31 | asmlinkage long compat_sys_sigreturn(void); |
31 | 32 | asmlinkage long compat_sys_rt_sigreturn(void); |
32 | | -asmlinkage long compat_sys_statfs64_wrapper(void); |
33 | | -asmlinkage long compat_sys_fstatfs64_wrapper(void); |
34 | | -asmlinkage long compat_sys_pread64_wrapper(void); |
35 | | -asmlinkage long compat_sys_pwrite64_wrapper(void); |
36 | | -asmlinkage long compat_sys_truncate64_wrapper(void); |
37 | | -asmlinkage long compat_sys_ftruncate64_wrapper(void); |
38 | | -asmlinkage long compat_sys_readahead_wrapper(void); |
39 | | -asmlinkage long compat_sys_fadvise64_64_wrapper(void); |
40 | | -asmlinkage long compat_sys_sync_file_range2_wrapper(void); |
41 | | -asmlinkage long compat_sys_fallocate_wrapper(void); |
42 | | -asmlinkage long compat_sys_mmap2_wrapper(void); |
| 33 | + |
| 34 | +COMPAT_SYSCALL_DEFINE3(aarch32_statfs64, const char __user *, pathname, |
| 35 | + compat_size_t, sz, struct compat_statfs64 __user *, buf) |
| 36 | +{ |
| 37 | + /* |
| 38 | + * 32-bit ARM applies an OABI compatibility fixup to statfs64 and |
| 39 | + * fstatfs64 regardless of whether OABI is in use, and therefore |
| 40 | + * arbitrary binaries may rely upon it, so we must do the same. |
| 41 | + * For more details, see commit: |
| 42 | + * |
| 43 | + * 713c481519f19df9 ("[ARM] 3108/2: old ABI compat: statfs64 and |
| 44 | + * fstatfs64") |
| 45 | + */ |
| 46 | + if (sz == 88) |
| 47 | + sz = 84; |
| 48 | + |
| 49 | + return kcompat_sys_statfs64(pathname, sz, buf); |
| 50 | +} |
| 51 | + |
| 52 | +COMPAT_SYSCALL_DEFINE3(aarch32_fstatfs64, unsigned int, fd, compat_size_t, sz, |
| 53 | + struct compat_statfs64 __user *, buf) |
| 54 | +{ |
| 55 | + /* see aarch32_statfs64 */ |
| 56 | + if (sz == 88) |
| 57 | + sz = 84; |
| 58 | + |
| 59 | + return kcompat_sys_fstatfs64(fd, sz, buf); |
| 60 | +} |
| 61 | + |
| 62 | +/* |
| 63 | + * Note: off_4k is always in units of 4K. If we can't do the |
| 64 | + * requested offset because it is not page-aligned, we return -EINVAL. |
| 65 | + */ |
| 66 | +COMPAT_SYSCALL_DEFINE6(aarch32_mmap2, unsigned long, addr, unsigned long, len, |
| 67 | + unsigned long, prot, unsigned long, flags, |
| 68 | + unsigned long, fd, unsigned long, off_4k) |
| 69 | +{ |
| 70 | + if (off_4k & (~PAGE_MASK >> 12)) |
| 71 | + return -EINVAL; |
| 72 | + |
| 73 | + off_4k >>= (PAGE_SHIFT - 12); |
| 74 | + |
| 75 | + return ksys_mmap_pgoff(addr, len, prot, flags, fd, off_4k); |
| 76 | +} |
| 77 | + |
| 78 | +#ifdef CONFIG_CPU_BIG_ENDIAN |
| 79 | +#define arg_u32p(name) u32, name##_hi, u32, name##_lo |
| 80 | +#else |
| 81 | +#define arg_u32p(name) u32, name##_lo, u32, name##_hi |
| 82 | +#endif |
| 83 | + |
| 84 | +#define arg_u64(name) (((u64)name##_hi << 32) | name##_lo) |
| 85 | + |
| 86 | +COMPAT_SYSCALL_DEFINE6(aarch32_pread64, unsigned int, fd, char __user *, buf, |
| 87 | + size_t, count, u32, __pad, arg_u32p(pos)) |
| 88 | +{ |
| 89 | + return ksys_pread64(fd, buf, count, arg_u64(pos)); |
| 90 | +} |
| 91 | + |
| 92 | +COMPAT_SYSCALL_DEFINE6(aarch32_pwrite64, unsigned int, fd, |
| 93 | + const char __user *, buf, size_t, count, u32, __pad, |
| 94 | + arg_u32p(pos)) |
| 95 | +{ |
| 96 | + return ksys_pwrite64(fd, buf, count, arg_u64(pos)); |
| 97 | +} |
| 98 | + |
| 99 | +COMPAT_SYSCALL_DEFINE4(aarch32_truncate64, const char __user *, pathname, |
| 100 | + u32, __pad, arg_u32p(length)) |
| 101 | +{ |
| 102 | + return ksys_truncate(pathname, arg_u64(length)); |
| 103 | +} |
| 104 | + |
| 105 | +COMPAT_SYSCALL_DEFINE4(aarch32_ftruncate64, unsigned int, fd, u32, __pad, |
| 106 | + arg_u32p(length)) |
| 107 | +{ |
| 108 | + return ksys_ftruncate(fd, arg_u64(length)); |
| 109 | +} |
| 110 | + |
| 111 | +COMPAT_SYSCALL_DEFINE5(aarch32_readahead, int, fd, u32, __pad, |
| 112 | + arg_u32p(offset), size_t, count) |
| 113 | +{ |
| 114 | + return ksys_readahead(fd, arg_u64(offset), count); |
| 115 | +} |
| 116 | + |
| 117 | +COMPAT_SYSCALL_DEFINE6(aarch32_fadvise64_64, int, fd, int, advice, |
| 118 | + arg_u32p(offset), arg_u32p(len)) |
| 119 | +{ |
| 120 | + return ksys_fadvise64_64(fd, arg_u64(offset), arg_u64(len), advice); |
| 121 | +} |
| 122 | + |
| 123 | +COMPAT_SYSCALL_DEFINE6(aarch32_sync_file_range2, int, fd, unsigned int, flags, |
| 124 | + arg_u32p(offset), arg_u32p(nbytes)) |
| 125 | +{ |
| 126 | + return ksys_sync_file_range(fd, arg_u64(offset), arg_u64(nbytes), |
| 127 | + flags); |
| 128 | +} |
| 129 | + |
| 130 | +COMPAT_SYSCALL_DEFINE6(aarch32_fallocate, int, fd, int, mode, |
| 131 | + arg_u32p(offset), arg_u32p(len)) |
| 132 | +{ |
| 133 | + return ksys_fallocate(fd, mode, arg_u64(offset), arg_u64(len)); |
| 134 | +} |
43 | 135 |
|
44 | 136 | #undef __SYSCALL |
45 | 137 | #define __SYSCALL(nr, sym) [nr] = (syscall_fn_t)sym, |
|
0 commit comments