1 /* 2 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls. 3 * 4 * Copyright (C) 2001 IBM 5 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 6 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) 7 * 8 * These routines maintain argument size conversion between 32bit and 64bit 9 * environment. 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 */ 16 17 #include <linux/kernel.h> 18 #include <linux/sched.h> 19 #include <linux/fs.h> 20 #include <linux/mm.h> 21 #include <linux/file.h> 22 #include <linux/signal.h> 23 #include <linux/resource.h> 24 #include <linux/times.h> 25 #include <linux/smp.h> 26 #include <linux/sem.h> 27 #include <linux/msg.h> 28 #include <linux/shm.h> 29 #include <linux/poll.h> 30 #include <linux/personality.h> 31 #include <linux/stat.h> 32 #include <linux/mman.h> 33 #include <linux/in.h> 34 #include <linux/syscalls.h> 35 #include <linux/unistd.h> 36 #include <linux/sysctl.h> 37 #include <linux/binfmts.h> 38 #include <linux/security.h> 39 #include <linux/compat.h> 40 #include <linux/ptrace.h> 41 #include <linux/elf.h> 42 #include <linux/ipc.h> 43 #include <linux/slab.h> 44 45 #include <asm/ptrace.h> 46 #include <asm/types.h> 47 #include <asm/uaccess.h> 48 #include <asm/unistd.h> 49 #include <asm/time.h> 50 #include <asm/mmu_context.h> 51 #include <asm/ppc-pci.h> 52 #include <asm/syscalls.h> 53 #include <asm/switch_to.h> 54 55 56 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp, 57 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 58 compat_uptr_t tvp_x) 59 { 60 /* sign extend n */ 61 return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x)); 62 } 63 64 #ifdef CONFIG_SYSVIPC 65 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, 66 u32 fifth) 67 { 68 int version; 69 70 version = call >> 16; /* hack for backward compatibility */ 71 call &= 0xffff; 72 73 switch (call) { 74 75 case SEMTIMEDOP: 76 if (fifth) 77 /* sign extend semid */ 78 return compat_sys_semtimedop((int)first, 79 compat_ptr(ptr), second, 80 compat_ptr(fifth)); 81 /* else fall through for normal semop() */ 82 case SEMOP: 83 /* struct sembuf is the same on 32 and 64bit :)) */ 84 /* sign extend semid */ 85 return sys_semtimedop((int)first, compat_ptr(ptr), second, 86 NULL); 87 case SEMGET: 88 /* sign extend key, nsems */ 89 return sys_semget((int)first, (int)second, third); 90 case SEMCTL: 91 /* sign extend semid, semnum */ 92 return compat_sys_semctl((int)first, (int)second, third, 93 compat_ptr(ptr)); 94 95 case MSGSND: 96 /* sign extend msqid */ 97 return compat_sys_msgsnd((int)first, (int)second, third, 98 compat_ptr(ptr)); 99 case MSGRCV: 100 /* sign extend msqid, msgtyp */ 101 return compat_sys_msgrcv((int)first, second, (int)fifth, 102 third, version, compat_ptr(ptr)); 103 case MSGGET: 104 /* sign extend key */ 105 return sys_msgget((int)first, second); 106 case MSGCTL: 107 /* sign extend msqid */ 108 return compat_sys_msgctl((int)first, second, compat_ptr(ptr)); 109 110 case SHMAT: 111 /* sign extend shmid */ 112 return compat_sys_shmat((int)first, second, third, version, 113 compat_ptr(ptr)); 114 case SHMDT: 115 return sys_shmdt(compat_ptr(ptr)); 116 case SHMGET: 117 /* sign extend key_t */ 118 return sys_shmget((int)first, second, third); 119 case SHMCTL: 120 /* sign extend shmid */ 121 return compat_sys_shmctl((int)first, second, compat_ptr(ptr)); 122 123 default: 124 return -ENOSYS; 125 } 126 127 return -ENOSYS; 128 } 129 #endif 130 131 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints, 132 * with the corresponding cast to a signed int to insure that the 133 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) 134 * and the register representation of a signed int (msr in 64-bit mode) is performed. 135 */ 136 asmlinkage long compat_sys_sendfile_wrapper(u32 out_fd, u32 in_fd, 137 compat_off_t __user *offset, u32 count) 138 { 139 return compat_sys_sendfile((int)out_fd, (int)in_fd, offset, count); 140 } 141 142 asmlinkage long compat_sys_sendfile64_wrapper(u32 out_fd, u32 in_fd, 143 compat_loff_t __user *offset, u32 count) 144 { 145 return sys_sendfile((int)out_fd, (int)in_fd, 146 (off_t __user *)offset, count); 147 } 148 149 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin) 150 { 151 /* sign extend n */ 152 return sys_lseek(fd, (int)offset, origin); 153 } 154 155 long compat_sys_truncate(const char __user * path, u32 length) 156 { 157 /* sign extend length */ 158 return sys_truncate(path, (int)length); 159 } 160 161 long compat_sys_ftruncate(int fd, u32 length) 162 { 163 /* sign extend length */ 164 return sys_ftruncate(fd, (int)length); 165 } 166 167 unsigned long compat_sys_mmap2(unsigned long addr, size_t len, 168 unsigned long prot, unsigned long flags, 169 unsigned long fd, unsigned long pgoff) 170 { 171 /* This should remain 12 even if PAGE_SIZE changes */ 172 return sys_mmap(addr, len, prot, flags, fd, pgoff << 12); 173 } 174 175 /* 176 * long long munging: 177 * The 32 bit ABI passes long longs in an odd even register pair. 178 */ 179 180 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count, 181 u32 reg6, u32 poshi, u32 poslo) 182 { 183 return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo); 184 } 185 186 compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count, 187 u32 reg6, u32 poshi, u32 poslo) 188 { 189 return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo); 190 } 191 192 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count) 193 { 194 return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count); 195 } 196 197 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4, 198 unsigned long high, unsigned long low) 199 { 200 return sys_truncate(path, (high << 32) | low); 201 } 202 203 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo, 204 u32 lenhi, u32 lenlo) 205 { 206 return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo, 207 ((loff_t)lenhi << 32) | lenlo); 208 } 209 210 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high, 211 unsigned long low) 212 { 213 return sys_ftruncate(fd, (high << 32) | low); 214 } 215 216 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf, 217 size_t len) 218 { 219 return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low, 220 buf, len); 221 } 222 223 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low, 224 size_t len, int advice) 225 { 226 return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len, 227 advice); 228 } 229 230 asmlinkage long compat_sys_add_key(const char __user *_type, 231 const char __user *_description, 232 const void __user *_payload, 233 u32 plen, 234 u32 ringid) 235 { 236 return sys_add_key(_type, _description, _payload, plen, ringid); 237 } 238 239 asmlinkage long compat_sys_request_key(const char __user *_type, 240 const char __user *_description, 241 const char __user *_callout_info, 242 u32 destringid) 243 { 244 return sys_request_key(_type, _description, _callout_info, destringid); 245 } 246 247 asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags, 248 unsigned offset_hi, unsigned offset_lo, 249 unsigned nbytes_hi, unsigned nbytes_lo) 250 { 251 loff_t offset = ((loff_t)offset_hi << 32) | offset_lo; 252 loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo; 253 254 return sys_sync_file_range(fd, offset, nbytes, flags); 255 } 256 257 asmlinkage long compat_sys_fanotify_mark(int fanotify_fd, unsigned int flags, 258 unsigned mask_hi, unsigned mask_lo, 259 int dfd, const char __user *pathname) 260 { 261 u64 mask = ((u64)mask_hi << 32) | mask_lo; 262 return sys_fanotify_mark(fanotify_fd, flags, mask, dfd, pathname); 263 } 264