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22#include <linux/errno.h>
23#include <linux/sched.h>
24#include <linux/syscalls.h>
25#include <linux/mm.h>
26#include <linux/fs.h>
27#include <linux/smp.h>
28#include <linux/sem.h>
29#include <linux/msg.h>
30#include <linux/shm.h>
31#include <linux/stat.h>
32#include <linux/mman.h>
33#include <linux/sys.h>
34#include <linux/ipc.h>
35#include <linux/utsname.h>
36#include <linux/file.h>
37#include <linux/init.h>
38#include <linux/personality.h>
39
40#include <asm/uaccess.h>
41#include <asm/syscalls.h>
42#include <asm/time.h>
43#include <asm/unistd.h>
44
45
46
47
48
49
50int sys_ipc(uint call, int first, unsigned long second, long third,
51 void __user *ptr, long fifth)
52{
53 int version, ret;
54
55 version = call >> 16;
56 call &= 0xffff;
57
58 ret = -ENOSYS;
59 switch (call) {
60 case SEMOP:
61 ret = sys_semtimedop(first, (struct sembuf __user *)ptr,
62 (unsigned)second, NULL);
63 break;
64 case SEMTIMEDOP:
65 ret = sys_semtimedop(first, (struct sembuf __user *)ptr,
66 (unsigned)second,
67 (const struct timespec __user *) fifth);
68 break;
69 case SEMGET:
70 ret = sys_semget (first, (int)second, third);
71 break;
72 case SEMCTL: {
73 union semun fourth;
74
75 ret = -EINVAL;
76 if (!ptr)
77 break;
78 if ((ret = get_user(fourth.__pad, (void __user * __user *)ptr)))
79 break;
80 ret = sys_semctl(first, (int)second, third, fourth);
81 break;
82 }
83 case MSGSND:
84 ret = sys_msgsnd(first, (struct msgbuf __user *)ptr,
85 (size_t)second, third);
86 break;
87 case MSGRCV:
88 switch (version) {
89 case 0: {
90 struct ipc_kludge tmp;
91
92 ret = -EINVAL;
93 if (!ptr)
94 break;
95 if ((ret = copy_from_user(&tmp,
96 (struct ipc_kludge __user *) ptr,
97 sizeof (tmp)) ? -EFAULT : 0))
98 break;
99 ret = sys_msgrcv(first, tmp.msgp, (size_t) second,
100 tmp.msgtyp, third);
101 break;
102 }
103 default:
104 ret = sys_msgrcv (first, (struct msgbuf __user *) ptr,
105 (size_t)second, fifth, third);
106 break;
107 }
108 break;
109 case MSGGET:
110 ret = sys_msgget((key_t)first, (int)second);
111 break;
112 case MSGCTL:
113 ret = sys_msgctl(first, (int)second,
114 (struct msqid_ds __user *)ptr);
115 break;
116 case SHMAT: {
117 ulong raddr;
118 ret = do_shmat(first, (char __user *)ptr, (int)second, &raddr);
119 if (ret)
120 break;
121 ret = put_user(raddr, (ulong __user *) third);
122 break;
123 }
124 case SHMDT:
125 ret = sys_shmdt((char __user *)ptr);
126 break;
127 case SHMGET:
128 ret = sys_shmget(first, (size_t)second, third);
129 break;
130 case SHMCTL:
131 ret = sys_shmctl(first, (int)second,
132 (struct shmid_ds __user *)ptr);
133 break;
134 }
135
136 return ret;
137}
138
139static inline unsigned long do_mmap2(unsigned long addr, size_t len,
140 unsigned long prot, unsigned long flags,
141 unsigned long fd, unsigned long off, int shift)
142{
143 struct file * file = NULL;
144 unsigned long ret = -EINVAL;
145
146 if (!arch_validate_prot(prot))
147 goto out;
148
149 if (shift) {
150 if (off & ((1 << shift) - 1))
151 goto out;
152 off >>= shift;
153 }
154
155 ret = -EBADF;
156 if (!(flags & MAP_ANONYMOUS)) {
157 if (!(file = fget(fd)))
158 goto out;
159 }
160
161 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
162
163 down_write(¤t->mm->mmap_sem);
164 ret = do_mmap_pgoff(file, addr, len, prot, flags, off);
165 up_write(¤t->mm->mmap_sem);
166 if (file)
167 fput(file);
168out:
169 return ret;
170}
171
172unsigned long sys_mmap2(unsigned long addr, size_t len,
173 unsigned long prot, unsigned long flags,
174 unsigned long fd, unsigned long pgoff)
175{
176 return do_mmap2(addr, len, prot, flags, fd, pgoff, PAGE_SHIFT-12);
177}
178
179unsigned long sys_mmap(unsigned long addr, size_t len,
180 unsigned long prot, unsigned long flags,
181 unsigned long fd, off_t offset)
182{
183 return do_mmap2(addr, len, prot, flags, fd, offset, PAGE_SHIFT);
184}
185
186#ifdef CONFIG_PPC32
187
188
189
190
191
192
193int
194ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct timeval __user *tvp)
195{
196 if ( (unsigned long)n >= 4096 )
197 {
198 unsigned long __user *buffer = (unsigned long __user *)n;
199 if (!access_ok(VERIFY_READ, buffer, 5*sizeof(unsigned long))
200 || __get_user(n, buffer)
201 || __get_user(inp, ((fd_set __user * __user *)(buffer+1)))
202 || __get_user(outp, ((fd_set __user * __user *)(buffer+2)))
203 || __get_user(exp, ((fd_set __user * __user *)(buffer+3)))
204 || __get_user(tvp, ((struct timeval __user * __user *)(buffer+4))))
205 return -EFAULT;
206 }
207 return sys_select(n, inp, outp, exp, tvp);
208}
209#endif
210
211#ifdef CONFIG_PPC64
212long ppc64_personality(unsigned long personality)
213{
214 long ret;
215
216 if (personality(current->personality) == PER_LINUX32
217 && personality == PER_LINUX)
218 personality = PER_LINUX32;
219 ret = sys_personality(personality);
220 if (ret == PER_LINUX32)
221 ret = PER_LINUX;
222 return ret;
223}
224#endif
225
226#ifdef CONFIG_PPC64
227#define OVERRIDE_MACHINE (personality(current->personality) == PER_LINUX32)
228#else
229#define OVERRIDE_MACHINE 0
230#endif
231
232static inline int override_machine(char __user *mach)
233{
234 if (OVERRIDE_MACHINE) {
235
236 if (__put_user(0, mach+3) || __put_user(0, mach+4))
237 return -EFAULT;
238 }
239 return 0;
240}
241
242long ppc_newuname(struct new_utsname __user * name)
243{
244 int err = 0;
245
246 down_read(&uts_sem);
247 if (copy_to_user(name, utsname(), sizeof(*name)))
248 err = -EFAULT;
249 up_read(&uts_sem);
250 if (!err)
251 err = override_machine(name->machine);
252 return err;
253}
254
255int sys_uname(struct old_utsname __user *name)
256{
257 int err = 0;
258
259 down_read(&uts_sem);
260 if (copy_to_user(name, utsname(), sizeof(*name)))
261 err = -EFAULT;
262 up_read(&uts_sem);
263 if (!err)
264 err = override_machine(name->machine);
265 return err;
266}
267
268int sys_olduname(struct oldold_utsname __user *name)
269{
270 int error;
271
272 if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
273 return -EFAULT;
274
275 down_read(&uts_sem);
276 error = __copy_to_user(&name->sysname, &utsname()->sysname,
277 __OLD_UTS_LEN);
278 error |= __put_user(0, name->sysname + __OLD_UTS_LEN);
279 error |= __copy_to_user(&name->nodename, &utsname()->nodename,
280 __OLD_UTS_LEN);
281 error |= __put_user(0, name->nodename + __OLD_UTS_LEN);
282 error |= __copy_to_user(&name->release, &utsname()->release,
283 __OLD_UTS_LEN);
284 error |= __put_user(0, name->release + __OLD_UTS_LEN);
285 error |= __copy_to_user(&name->version, &utsname()->version,
286 __OLD_UTS_LEN);
287 error |= __put_user(0, name->version + __OLD_UTS_LEN);
288 error |= __copy_to_user(&name->machine, &utsname()->machine,
289 __OLD_UTS_LEN);
290 error |= override_machine(name->machine);
291 up_read(&uts_sem);
292
293 return error? -EFAULT: 0;
294}
295
296long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
297 u32 len_high, u32 len_low)
298{
299 return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low,
300 (u64)len_high << 32 | len_low, advice);
301}
302
303void do_show_syscall(unsigned long r3, unsigned long r4, unsigned long r5,
304 unsigned long r6, unsigned long r7, unsigned long r8,
305 struct pt_regs *regs)
306{
307 printk("syscall %ld(%lx, %lx, %lx, %lx, %lx, %lx) regs=%p current=%p"
308 " cpu=%d\n", regs->gpr[0], r3, r4, r5, r6, r7, r8, regs,
309 current, smp_processor_id());
310}
311
312void do_show_syscall_exit(unsigned long r3)
313{
314 printk(" -> %lx, current=%p cpu=%d\n", r3, current, smp_processor_id());
315}
316
