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
54COMPAT_SYSCALL_DEFINE3(truncate64, const char __user *, path, u32, high, u32, low)
55{
56	return ksys_truncate(path, ((u64)high << 32) | low);
57}
58
59COMPAT_SYSCALL_DEFINE3(ftruncate64, unsigned int, fd, u32, high, u32, low)
60{
61	return ksys_ftruncate(fd, ((u64)high << 32) | low);
62}
63
64static 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
94COMPAT_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
105COMPAT_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
116COMPAT_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
127COMPAT_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
140COMPAT_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
148COMPAT_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
190COMPAT_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
196COMPAT_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
202COMPAT_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
208COMPAT_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
214COMPAT_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
223COMPAT_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
232COMPAT_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