2 * Conversion between 32-bit and 64-bit native system calls.
4 * Copyright (C) 2000 Silicon Graphics, Inc.
5 * Written by Ulf Carlsson (ulfc@engr.sgi.com)
6 * sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar (kanoj@sgi.com)
8 #include <linux/compiler.h>
10 #include <linux/errno.h>
11 #include <linux/file.h>
12 #include <linux/smp_lock.h>
13 #include <linux/highuid.h>
14 #include <linux/resource.h>
15 #include <linux/highmem.h>
16 #include <linux/time.h>
17 #include <linux/times.h>
18 #include <linux/poll.h>
19 #include <linux/slab.h>
20 #include <linux/skbuff.h>
21 #include <linux/filter.h>
22 #include <linux/shm.h>
23 #include <linux/sem.h>
24 #include <linux/msg.h>
25 #include <linux/icmpv6.h>
26 #include <linux/syscalls.h>
27 #include <linux/sysctl.h>
28 #include <linux/utime.h>
29 #include <linux/utsname.h>
30 #include <linux/personality.h>
31 #include <linux/dnotify.h>
32 #include <linux/module.h>
33 #include <linux/binfmts.h>
34 #include <linux/security.h>
35 #include <linux/compat.h>
36 #include <linux/vfs.h>
37 #include <linux/ipc.h>
42 #include <asm/compat-signal.h>
44 #include <asm/uaccess.h>
45 #include <asm/mmu_context.h>
48 /* Use this to get at 32-bit user passed pointers. */
49 /* A() macro should be used for places where you e.g.
50 have some internal variable u32 and just want to get
51 rid of a compiler warning. AA() has to be used in
52 places where you want to convert a function argument
53 to 32bit pointer or when you e.g. access pt_regs
54 structure and want to consider 32bit registers only.
56 #define A(__x) ((unsigned long)(__x))
57 #define AA(__x) ((unsigned long)((int)__x))
60 #define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
63 #define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
66 SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len,
67 unsigned long, prot, unsigned long, flags, unsigned long, fd,
73 if (pgoff & (~PAGE_MASK >> 12))
75 error = sys_mmap_pgoff(addr, len, prot, flags, fd,
76 pgoff >> (PAGE_SHIFT-12));
82 * sys_execve() executes a new program.
84 asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
89 filename = getname(compat_ptr(regs.regs[4]));
90 error = PTR_ERR(filename);
93 error = compat_do_execve(filename, compat_ptr(regs.regs[5]),
94 compat_ptr(regs.regs[6]), ®s);
101 #define RLIM_INFINITY32 0x7fffffff
102 #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
109 SYSCALL_DEFINE4(32_truncate64, const char __user *, path,
110 unsigned long, __dummy, unsigned long, a2, unsigned long, a3)
112 return sys_truncate(path, merge_64(a2, a3));
115 SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy,
116 unsigned long, a2, unsigned long, a3)
118 return sys_ftruncate(fd, merge_64(a2, a3));
121 SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high,
122 unsigned int, offset_low, loff_t __user *, result,
123 unsigned int, origin)
125 return sys_llseek(fd, offset_high, offset_low, result, origin);
128 /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
129 lseek back to original location. They fail just like lseek does on
130 non-seekable files. */
132 SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count,
133 unsigned long, unused, unsigned long, a4, unsigned long, a5)
135 return sys_pread64(fd, buf, count, merge_64(a4, a5));
138 SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf,
139 size_t, count, u32, unused, u64, a4, u64, a5)
141 return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
144 SYSCALL_DEFINE2(32_sched_rr_get_interval, compat_pid_t, pid,
145 struct compat_timespec __user *, interval)
149 mm_segment_t old_fs = get_fs();
152 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
154 if (put_user (t.tv_sec, &interval->tv_sec) ||
155 __put_user(t.tv_nsec, &interval->tv_nsec))
160 #ifdef CONFIG_SYSVIPC
162 SYSCALL_DEFINE6(32_ipc, u32, call, long, first, long, second, long, third,
163 unsigned long, ptr, unsigned long, fifth)
167 version = call >> 16; /* hack for backward compatibility */
172 /* struct sembuf is the same on 32 and 64bit :)) */
173 err = sys_semtimedop(first, compat_ptr(ptr), second, NULL);
176 err = compat_sys_semtimedop(first, compat_ptr(ptr), second,
180 err = sys_semget(first, second, third);
183 err = compat_sys_semctl(first, second, third, compat_ptr(ptr));
186 err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
189 err = compat_sys_msgrcv(first, second, fifth, third,
190 version, compat_ptr(ptr));
193 err = sys_msgget((key_t) first, second);
196 err = compat_sys_msgctl(first, second, compat_ptr(ptr));
199 err = compat_sys_shmat(first, second, third, version,
203 err = sys_shmdt(compat_ptr(ptr));
206 err = sys_shmget(first, (unsigned)second, third);
209 err = compat_sys_shmctl(first, second, compat_ptr(ptr));
221 SYSCALL_DEFINE6(32_ipc, u32, call, int, first, int, second, int, third,
222 u32, ptr, u32, fifth)
227 #endif /* CONFIG_SYSVIPC */
229 #ifdef CONFIG_MIPS32_N32
230 SYSCALL_DEFINE4(n32_semctl, int, semid, int, semnum, int, cmd, u32, arg)
232 /* compat_sys_semctl expects a pointer to union semun */
233 u32 __user *uptr = compat_alloc_user_space(sizeof(u32));
234 if (put_user(arg, uptr))
236 return compat_sys_semctl(semid, semnum, cmd, uptr);
239 SYSCALL_DEFINE4(n32_msgsnd, int, msqid, u32, msgp, unsigned int, msgsz,
242 return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp));
245 SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz,
246 int, msgtyp, int, msgflg)
248 return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64,
253 SYSCALL_DEFINE1(32_newuname, struct new_utsname __user *, name)
258 if (copy_to_user(name, utsname(), sizeof *name))
262 if (current->personality == PER_LINUX32 && !ret)
263 if (copy_to_user(name->machine, "mips\0\0\0", 8))
269 SYSCALL_DEFINE1(32_personality, unsigned long, personality)
272 personality &= 0xffffffff;
273 if (personality(current->personality) == PER_LINUX32 &&
274 personality == PER_LINUX)
275 personality = PER_LINUX32;
276 ret = sys_personality(personality);
277 if (ret == PER_LINUX32)
282 SYSCALL_DEFINE4(32_sendfile, long, out_fd, long, in_fd,
283 compat_off_t __user *, offset, s32, count)
285 mm_segment_t old_fs = get_fs();
289 if (offset && get_user(of, offset))
293 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
296 if (offset && put_user(of, offset))
302 asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
305 return sys_readahead(fd, merge_64(a2, a3), count);
308 asmlinkage long sys32_sync_file_range(int fd, int __pad,
309 unsigned long a2, unsigned long a3,
310 unsigned long a4, unsigned long a5,
313 return sys_sync_file_range(fd,
314 merge_64(a2, a3), merge_64(a4, a5),
318 asmlinkage long sys32_fadvise64_64(int fd, int __pad,
319 unsigned long a2, unsigned long a3,
320 unsigned long a4, unsigned long a5,
323 return sys_fadvise64_64(fd,
324 merge_64(a2, a3), merge_64(a4, a5),
328 asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
329 unsigned offset_a3, unsigned len_a4, unsigned len_a5)
331 return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
332 merge_64(len_a4, len_a5));
335 save_static_function(sys32_clone);
336 static int noinline __used
337 _sys32_clone(nabi_no_regargs struct pt_regs regs)
339 unsigned long clone_flags;
341 int __user *parent_tidptr, *child_tidptr;
343 clone_flags = regs.regs[4];
344 newsp = regs.regs[5];
346 newsp = regs.regs[29];
347 parent_tidptr = (int __user *) regs.regs[6];
349 /* Use __dummy4 instead of getting it off the stack, so that
351 child_tidptr = (int __user *) __dummy4;
352 return do_fork(clone_flags, newsp, ®s, 0,
353 parent_tidptr, child_tidptr);
356 asmlinkage long sys32_lookup_dcookie(u32 a0, u32 a1, char __user *buf,
359 return sys_lookup_dcookie(merge_64(a0, a1), buf, len);