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