1 // SPDX-License-Identifier: GPL-2.0 2 /* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls. 3 * 4 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 5 * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net) 6 * 7 * These routines maintain argument size conversion between 32bit and 64bit 8 * environment. 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/sched.h> 13 #include <linux/capability.h> 14 #include <linux/fs.h> 15 #include <linux/mm.h> 16 #include <linux/file.h> 17 #include <linux/signal.h> 18 #include <linux/resource.h> 19 #include <linux/times.h> 20 #include <linux/smp.h> 21 #include <linux/sem.h> 22 #include <linux/msg.h> 23 #include <linux/shm.h> 24 #include <linux/uio.h> 25 #include <linux/nfs_fs.h> 26 #include <linux/quota.h> 27 #include <linux/poll.h> 28 #include <linux/personality.h> 29 #include <linux/stat.h> 30 #include <linux/filter.h> 31 #include <linux/highmem.h> 32 #include <linux/highuid.h> 33 #include <linux/mman.h> 34 #include <linux/ipv6.h> 35 #include <linux/in.h> 36 #include <linux/icmpv6.h> 37 #include <linux/syscalls.h> 38 #include <linux/sysctl.h> 39 #include <linux/binfmts.h> 40 #include <linux/dnotify.h> 41 #include <linux/security.h> 42 #include <linux/compat.h> 43 #include <linux/vfs.h> 44 #include <linux/ptrace.h> 45 #include <linux/slab.h> 46 47 #include <asm/types.h> 48 #include <linux/uaccess.h> 49 #include <asm/fpumacro.h> 50 #include <asm/mmu_context.h> 51 #include <asm/compat_signal.h> 52 53 #include "systbls.h" 54 55 COMPAT_SYSCALL_DEFINE3(truncate64, const char __user *, path, u32, high, u32, low) 56 { 57 return ksys_truncate(path, ((u64)high << 32) | low); 58 } 59 60 COMPAT_SYSCALL_DEFINE3(ftruncate64, unsigned int, fd, u32, high, u32, low) 61 { 62 return ksys_ftruncate(fd, ((u64)high << 32) | low); 63 } 64 65 static int cp_compat_stat64(struct kstat *stat, 66 struct compat_stat64 __user *statbuf) 67 { 68 int err; 69 70 err = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev); 71 err |= put_user(stat->ino, &statbuf->st_ino); 72 err |= put_user(stat->mode, &statbuf->st_mode); 73 err |= put_user(stat->nlink, &statbuf->st_nlink); 74 err |= put_user(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid); 75 err |= put_user(from_kgid_munged(current_user_ns(), stat->gid), &statbuf->st_gid); 76 err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev); 77 err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]); 78 err |= put_user(stat->size, &statbuf->st_size); 79 err |= put_user(stat->blksize, &statbuf->st_blksize); 80 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]); 81 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]); 82 err |= put_user(stat->blocks, &statbuf->st_blocks); 83 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime); 84 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec); 85 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime); 86 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec); 87 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime); 88 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec); 89 err |= put_user(0, &statbuf->__unused4); 90 err |= put_user(0, &statbuf->__unused5); 91 92 return err; 93 } 94 95 COMPAT_SYSCALL_DEFINE2(stat64, const char __user *, filename, 96 struct compat_stat64 __user *, statbuf) 97 { 98 struct kstat stat; 99 int error = vfs_stat(filename, &stat); 100 101 if (!error) 102 error = cp_compat_stat64(&stat, statbuf); 103 return error; 104 } 105 106 COMPAT_SYSCALL_DEFINE2(lstat64, const char __user *, filename, 107 struct compat_stat64 __user *, statbuf) 108 { 109 struct kstat stat; 110 int error = vfs_lstat(filename, &stat); 111 112 if (!error) 113 error = cp_compat_stat64(&stat, statbuf); 114 return error; 115 } 116 117 COMPAT_SYSCALL_DEFINE2(fstat64, unsigned int, fd, 118 struct compat_stat64 __user *, statbuf) 119 { 120 struct kstat stat; 121 int error = vfs_fstat(fd, &stat); 122 123 if (!error) 124 error = cp_compat_stat64(&stat, statbuf); 125 return error; 126 } 127 128 COMPAT_SYSCALL_DEFINE4(fstatat64, unsigned int, dfd, 129 const char __user *, filename, 130 struct compat_stat64 __user *, statbuf, int, flag) 131 { 132 struct kstat stat; 133 int error; 134 135 error = vfs_fstatat(dfd, filename, &stat, flag); 136 if (error) 137 return error; 138 return cp_compat_stat64(&stat, statbuf); 139 } 140 141 COMPAT_SYSCALL_DEFINE3(sparc_sigaction, int, sig, 142 struct compat_old_sigaction __user *,act, 143 struct compat_old_sigaction __user *,oact) 144 { 145 WARN_ON_ONCE(sig >= 0); 146 return compat_sys_sigaction(-sig, act, oact); 147 } 148 149 COMPAT_SYSCALL_DEFINE5(rt_sigaction, int, sig, 150 struct compat_sigaction __user *,act, 151 struct compat_sigaction __user *,oact, 152 void __user *,restorer, 153 compat_size_t,sigsetsize) 154 { 155 struct k_sigaction new_ka, old_ka; 156 int ret; 157 158 /* XXX: Don't preclude handling different sized sigset_t's. */ 159 if (sigsetsize != sizeof(compat_sigset_t)) 160 return -EINVAL; 161 162 if (act) { 163 u32 u_handler, u_restorer; 164 165 new_ka.ka_restorer = restorer; 166 ret = get_user(u_handler, &act->sa_handler); 167 new_ka.sa.sa_handler = compat_ptr(u_handler); 168 ret |= get_compat_sigset(&new_ka.sa.sa_mask, &act->sa_mask); 169 ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags); 170 ret |= get_user(u_restorer, &act->sa_restorer); 171 new_ka.sa.sa_restorer = compat_ptr(u_restorer); 172 if (ret) 173 return -EFAULT; 174 } 175 176 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); 177 178 if (!ret && oact) { 179 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler); 180 ret |= put_compat_sigset(&oact->sa_mask, &old_ka.sa.sa_mask, 181 sizeof(oact->sa_mask)); 182 ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags); 183 ret |= put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer); 184 if (ret) 185 ret = -EFAULT; 186 } 187 188 return ret; 189 } 190 191 COMPAT_SYSCALL_DEFINE5(pread64, unsigned int, fd, char __user *, ubuf, 192 compat_size_t, count, u32, poshi, u32, poslo) 193 { 194 return ksys_pread64(fd, ubuf, count, ((u64)poshi << 32) | poslo); 195 } 196 197 COMPAT_SYSCALL_DEFINE5(pwrite64, unsigned int, fd, char __user *, ubuf, 198 compat_size_t, count, u32, poshi, u32, poslo) 199 { 200 return ksys_pwrite64(fd, ubuf, count, ((u64)poshi << 32) | poslo); 201 } 202 203 COMPAT_SYSCALL_DEFINE4(readahead, int, fd, u32, offhi, u32, offlo, 204 compat_size_t, count) 205 { 206 return ksys_readahead(fd, ((u64)offhi << 32) | offlo, count); 207 } 208 209 COMPAT_SYSCALL_DEFINE5(fadvise64, int, fd, u32, offhi, u32, offlo, 210 compat_size_t, len, int, advice) 211 { 212 return ksys_fadvise64_64(fd, ((u64)offhi << 32) | offlo, len, advice); 213 } 214 215 COMPAT_SYSCALL_DEFINE6(fadvise64_64, int, fd, u32, offhi, u32, offlo, 216 u32, lenhi, u32, lenlo, int, advice) 217 { 218 return ksys_fadvise64_64(fd, 219 ((u64)offhi << 32) | offlo, 220 ((u64)lenhi << 32) | lenlo, 221 advice); 222 } 223 224 COMPAT_SYSCALL_DEFINE6(sync_file_range, unsigned int, fd, u32, off_high, u32, off_low, 225 u32, nb_high, u32, nb_low, unsigned int, flags) 226 { 227 return ksys_sync_file_range(fd, 228 ((u64)off_high << 32) | off_low, 229 ((u64)nb_high << 32) | nb_low, 230 flags); 231 } 232 233 COMPAT_SYSCALL_DEFINE6(fallocate, int, fd, int, mode, u32, offhi, u32, offlo, 234 u32, lenhi, u32, lenlo) 235 { 236 return ksys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo, 237 ((loff_t)lenhi << 32) | lenlo); 238 } 239