1 /* 2 * Conversion between 32-bit and 64-bit native system calls. 3 * 4 * Copyright (C) 2000 Silicon Graphics, Inc. 5 * Written by Ulf Carlsson (ulfc@engr.sgi.com) 6 */ 7 #include <linux/compiler.h> 8 #include <linux/mm.h> 9 #include <linux/errno.h> 10 #include <linux/file.h> 11 #include <linux/highuid.h> 12 #include <linux/resource.h> 13 #include <linux/highmem.h> 14 #include <linux/time.h> 15 #include <linux/times.h> 16 #include <linux/poll.h> 17 #include <linux/skbuff.h> 18 #include <linux/filter.h> 19 #include <linux/shm.h> 20 #include <linux/sem.h> 21 #include <linux/msg.h> 22 #include <linux/icmpv6.h> 23 #include <linux/syscalls.h> 24 #include <linux/sysctl.h> 25 #include <linux/utime.h> 26 #include <linux/utsname.h> 27 #include <linux/personality.h> 28 #include <linux/dnotify.h> 29 #include <linux/module.h> 30 #include <linux/binfmts.h> 31 #include <linux/security.h> 32 #include <linux/compat.h> 33 #include <linux/vfs.h> 34 #include <linux/ipc.h> 35 #include <linux/slab.h> 36 37 #include <net/sock.h> 38 #include <net/scm.h> 39 40 #include <asm/compat-signal.h> 41 #include <asm/sim.h> 42 #include <asm/uaccess.h> 43 #include <asm/mmu_context.h> 44 #include <asm/mman.h> 45 46 /* Use this to get at 32-bit user passed pointers. */ 47 /* A() macro should be used for places where you e.g. 48 have some internal variable u32 and just want to get 49 rid of a compiler warning. AA() has to be used in 50 places where you want to convert a function argument 51 to 32bit pointer or when you e.g. access pt_regs 52 structure and want to consider 32bit registers only. 53 */ 54 #define A(__x) ((unsigned long)(__x)) 55 #define AA(__x) ((unsigned long)((int)__x)) 56 57 #ifdef __MIPSEB__ 58 #define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL)) 59 #endif 60 #ifdef __MIPSEL__ 61 #define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL)) 62 #endif 63 64 SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len, 65 unsigned long, prot, unsigned long, flags, unsigned long, fd, 66 unsigned long, pgoff) 67 { 68 unsigned long error; 69 70 error = -EINVAL; 71 if (pgoff & (~PAGE_MASK >> 12)) 72 goto out; 73 error = sys_mmap_pgoff(addr, len, prot, flags, fd, 74 pgoff >> (PAGE_SHIFT-12)); 75 out: 76 return error; 77 } 78 79 #define RLIM_INFINITY32 0x7fffffff 80 #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x) 81 82 struct rlimit32 { 83 int rlim_cur; 84 int rlim_max; 85 }; 86 87 SYSCALL_DEFINE4(32_truncate64, const char __user *, path, 88 unsigned long, __dummy, unsigned long, a2, unsigned long, a3) 89 { 90 return sys_truncate(path, merge_64(a2, a3)); 91 } 92 93 SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy, 94 unsigned long, a2, unsigned long, a3) 95 { 96 return sys_ftruncate(fd, merge_64(a2, a3)); 97 } 98 99 SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high, 100 unsigned int, offset_low, loff_t __user *, result, 101 unsigned int, origin) 102 { 103 return sys_llseek(fd, offset_high, offset_low, result, origin); 104 } 105 106 /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op + 107 lseek back to original location. They fail just like lseek does on 108 non-seekable files. */ 109 110 SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count, 111 unsigned long, unused, unsigned long, a4, unsigned long, a5) 112 { 113 return sys_pread64(fd, buf, count, merge_64(a4, a5)); 114 } 115 116 SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf, 117 size_t, count, u32, unused, u64, a4, u64, a5) 118 { 119 return sys_pwrite64(fd, buf, count, merge_64(a4, a5)); 120 } 121 122 SYSCALL_DEFINE1(32_personality, unsigned long, personality) 123 { 124 unsigned int p = personality & 0xffffffff; 125 int ret; 126 127 if (personality(current->personality) == PER_LINUX32 && 128 personality(p) == PER_LINUX) 129 p = (p & ~PER_MASK) | PER_LINUX32; 130 ret = sys_personality(p); 131 if (ret != -1 && personality(ret) == PER_LINUX32) 132 ret = (ret & ~PER_MASK) | PER_LINUX; 133 return ret; 134 } 135 136 asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3, 137 size_t count) 138 { 139 return sys_readahead(fd, merge_64(a2, a3), count); 140 } 141 142 asmlinkage long sys32_sync_file_range(int fd, int __pad, 143 unsigned long a2, unsigned long a3, 144 unsigned long a4, unsigned long a5, 145 int flags) 146 { 147 return sys_sync_file_range(fd, 148 merge_64(a2, a3), merge_64(a4, a5), 149 flags); 150 } 151 152 asmlinkage long sys32_fadvise64_64(int fd, int __pad, 153 unsigned long a2, unsigned long a3, 154 unsigned long a4, unsigned long a5, 155 int flags) 156 { 157 return sys_fadvise64_64(fd, 158 merge_64(a2, a3), merge_64(a4, a5), 159 flags); 160 } 161 162 asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2, 163 unsigned offset_a3, unsigned len_a4, unsigned len_a5) 164 { 165 return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3), 166 merge_64(len_a4, len_a5)); 167 } 168