1 // SPDX-License-Identifier: GPL-2.0
11  * Heavily inspired by the 32-bit Sparc compat code which is 
18 #include <linux/kernel.h>
19 #include <linux/sched.h>
20 #include <linux/fs.h> 
21 #include <linux/mm.h> 
22 #include <linux/file.h> 
23 #include <linux/signal.h>
24 #include <linux/resource.h>
25 #include <linux/times.h>
26 #include <linux/smp.h>
27 #include <linux/sem.h>
28 #include <linux/msg.h>
29 #include <linux/shm.h>
30 #include <linux/uio.h>
31 #include <linux/quota.h>
32 #include <linux/poll.h>
33 #include <linux/personality.h>
34 #include <linux/stat.h>
35 #include <linux/filter.h>
36 #include <linux/highmem.h>
37 #include <linux/mman.h>
38 #include <linux/ipv6.h>
39 #include <linux/in.h>
40 #include <linux/icmpv6.h>
41 #include <linux/syscalls.h>
42 #include <linux/sysctl.h>
43 #include <linux/binfmts.h>
44 #include <linux/capability.h>
45 #include <linux/compat.h>
46 #include <linux/vfs.h>
47 #include <linux/ptrace.h>
48 #include <linux/fadvise.h>
49 #include <linux/ipc.h>
50 #include <linux/slab.h>
52 #include <asm/types.h>
53 #include <linux/uaccess.h>
55 #include <net/scm.h>
56 #include <net/sock.h>
58 #include "compat_linux.h"
65 		return -EINVAL;  in COMPAT_SYSCALL_DEFINE5()
84 		return -EINVAL;  in COMPAT_SYSCALL_DEFINE5()
92 		return -EINVAL;  in COMPAT_SYSCALL_DEFINE5()
116 	u32             st_blocks;  /* Number 512-byte blocks allocated. */
132 	tmp.st_dev = huge_encode_dev(stat->dev);  in cp_stat64()
133 	tmp.st_ino = stat->ino;  in cp_stat64()
134 	tmp.__st_ino = (u32)stat->ino;  in cp_stat64()
135 	tmp.st_mode = stat->mode;  in cp_stat64()
136 	tmp.st_nlink = (unsigned int)stat->nlink;  in cp_stat64()
137 	tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);  in cp_stat64()
138 	tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);  in cp_stat64()
139 	tmp.st_rdev = huge_encode_dev(stat->rdev);  in cp_stat64()
140 	tmp.st_size = stat->size;  in cp_stat64()
141 	tmp.st_blksize = (u32)stat->blksize;  in cp_stat64()
142 	tmp.st_blocks = (u32)stat->blocks;  in cp_stat64()
143 	tmp.st_atime = (u32)stat->atime.tv_sec;  in cp_stat64()
144 	tmp.st_mtime = (u32)stat->mtime.tv_sec;  in cp_stat64()
145 	tmp.st_ctime = (u32)stat->ctime.tv_sec;  in cp_stat64()
147 	return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;   in cp_stat64()
191  * 4 system call parameters, so these system calls used a memory
206 	struct mmap_arg_struct_emu31 a;  in COMPAT_SYSCALL_DEFINE1()  local
208 	if (copy_from_user(&a, arg, sizeof(a)))  in COMPAT_SYSCALL_DEFINE1()
209 		return -EFAULT;  in COMPAT_SYSCALL_DEFINE1()
210 	if (a.offset & ~PAGE_MASK)  in COMPAT_SYSCALL_DEFINE1()
211 		return -EINVAL;  in COMPAT_SYSCALL_DEFINE1()
212 	return ksys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,  in COMPAT_SYSCALL_DEFINE1()
213 			       a.offset >> PAGE_SHIFT);  in COMPAT_SYSCALL_DEFINE1()
218 	struct mmap_arg_struct_emu31 a;  in COMPAT_SYSCALL_DEFINE1()  local
220 	if (copy_from_user(&a, arg, sizeof(a)))  in COMPAT_SYSCALL_DEFINE1()
221 		return -EFAULT;  in COMPAT_SYSCALL_DEFINE1()
222 	return ksys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);  in COMPAT_SYSCALL_DEFINE1()
228 		return -EINVAL;   in COMPAT_SYSCALL_DEFINE3()
236 		return -EINVAL;   in COMPAT_SYSCALL_DEFINE3()
266 	struct fadvise64_64_args a;  in COMPAT_SYSCALL_DEFINE1()  local
268 	if ( copy_from_user(&a, args, sizeof(a)) )  in COMPAT_SYSCALL_DEFINE1()
269 		return -EFAULT;  in COMPAT_SYSCALL_DEFINE1()
270 	if (a.advice == 4)  in COMPAT_SYSCALL_DEFINE1()
271 		a.advice = POSIX_FADV_DONTNEED;  in COMPAT_SYSCALL_DEFINE1()
272 	else if (a.advice == 5)  in COMPAT_SYSCALL_DEFINE1()
273 		a.advice = POSIX_FADV_NOREUSE;  in COMPAT_SYSCALL_DEFINE1()
274 	return ksys_fadvise64_64(a.fd, a.offset, a.len, a.advice);  in COMPAT_SYSCALL_DEFINE1()