2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1995, 1996, 1997, 2000, 2001, 05 by Ralf Baechle
7 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
8 * Copyright (C) 2001 MIPS Technologies, Inc.
10 #include <linux/a.out.h>
11 #include <linux/errno.h>
12 #include <linux/linkage.h>
14 #include <linux/smp.h>
15 #include <linux/smp_lock.h>
16 #include <linux/mman.h>
17 #include <linux/ptrace.h>
18 #include <linux/sched.h>
19 #include <linux/string.h>
20 #include <linux/syscalls.h>
21 #include <linux/file.h>
22 #include <linux/slab.h>
23 #include <linux/utsname.h>
24 #include <linux/unistd.h>
25 #include <linux/sem.h>
26 #include <linux/msg.h>
27 #include <linux/shm.h>
28 #include <linux/compiler.h>
30 #include <asm/branch.h>
31 #include <asm/cachectl.h>
32 #include <asm/cacheflush.h>
34 #include <asm/asm-offsets.h>
35 #include <asm/signal.h>
37 #include <asm/shmparam.h>
38 #include <asm/sysmips.h>
39 #include <asm/uaccess.h>
41 asmlinkage int sys_pipe(nabi_no_regargs volatile struct pt_regs regs)
57 unsigned long shm_align_mask = PAGE_SIZE - 1; /* Sane caches */
59 #define COLOUR_ALIGN(addr,pgoff) \
60 ((((addr) + shm_align_mask) & ~shm_align_mask) + \
61 (((pgoff) << PAGE_SHIFT) & shm_align_mask))
63 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
64 unsigned long len, unsigned long pgoff, unsigned long flags)
66 struct vm_area_struct * vmm;
68 unsigned long task_size;
70 task_size = STACK_TOP;
72 if (flags & MAP_FIXED) {
74 * We do not accept a shared mapping if it would violate
75 * cache aliasing constraints.
77 if ((flags & MAP_SHARED) && (addr & shm_align_mask))
85 if (filp || (flags & MAP_SHARED))
89 addr = COLOUR_ALIGN(addr, pgoff);
91 addr = PAGE_ALIGN(addr);
92 vmm = find_vma(current->mm, addr);
93 if (task_size - len >= addr &&
94 (!vmm || addr + len <= vmm->vm_start))
97 addr = TASK_UNMAPPED_BASE;
99 addr = COLOUR_ALIGN(addr, pgoff);
101 addr = PAGE_ALIGN(addr);
103 for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
104 /* At this point: (!vmm || addr < vmm->vm_end). */
105 if (task_size - len < addr)
107 if (!vmm || addr + len <= vmm->vm_start)
111 addr = COLOUR_ALIGN(addr, pgoff);
115 /* common code for old and new mmaps */
116 static inline unsigned long
117 do_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
118 unsigned long flags, unsigned long fd, unsigned long pgoff)
120 unsigned long error = -EBADF;
121 struct file * file = NULL;
123 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
124 if (!(flags & MAP_ANONYMOUS)) {
130 down_write(¤t->mm->mmap_sem);
131 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
132 up_write(¤t->mm->mmap_sem);
140 asmlinkage unsigned long
141 old_mmap(unsigned long addr, unsigned long len, int prot,
142 int flags, int fd, off_t offset)
144 unsigned long result;
147 if (offset & ~PAGE_MASK)
150 result = do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
156 asmlinkage unsigned long
157 sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
158 unsigned long flags, unsigned long fd, unsigned long pgoff)
160 return do_mmap2(addr, len, prot, flags, fd, pgoff);
163 save_static_function(sys_fork);
164 __attribute_used__ noinline static int
165 _sys_fork(nabi_no_regargs struct pt_regs regs)
167 return do_fork(SIGCHLD, regs.regs[29], ®s, 0, NULL, NULL);
170 save_static_function(sys_clone);
171 __attribute_used__ noinline static int
172 _sys_clone(nabi_no_regargs struct pt_regs regs)
174 unsigned long clone_flags;
176 int *parent_tidptr, *child_tidptr;
178 clone_flags = regs.regs[4];
179 newsp = regs.regs[5];
181 newsp = regs.regs[29];
182 parent_tidptr = (int *) regs.regs[6];
183 child_tidptr = (int *) regs.regs[7];
184 return do_fork(clone_flags, newsp, ®s, 0,
185 parent_tidptr, child_tidptr);
189 * sys_execve() executes a new program.
191 asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
196 filename = getname((char *) (long)regs.regs[4]);
197 error = PTR_ERR(filename);
198 if (IS_ERR(filename))
200 error = do_execve(filename, (char **) (long)regs.regs[5],
201 (char **) (long)regs.regs[6], ®s);
209 * Compacrapability ...
211 asmlinkage int sys_uname(struct old_utsname * name)
213 if (name && !copy_to_user(name, &system_utsname, sizeof (*name)))
219 * Compacrapability ...
221 asmlinkage int sys_olduname(struct oldold_utsname * name)
227 if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
230 error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
231 error -= __put_user(0,name->sysname+__OLD_UTS_LEN);
232 error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
233 error -= __put_user(0,name->nodename+__OLD_UTS_LEN);
234 error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
235 error -= __put_user(0,name->release+__OLD_UTS_LEN);
236 error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
237 error -= __put_user(0,name->version+__OLD_UTS_LEN);
238 error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
239 error = __put_user(0,name->machine+__OLD_UTS_LEN);
240 error = error ? -EFAULT : 0;
245 asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
252 char nodename[__NEW_UTS_LEN + 1];
254 if (!capable(CAP_SYS_ADMIN))
257 name = (char *) arg1;
259 len = strncpy_from_user(nodename, name, __NEW_UTS_LEN);
263 down_write(&uts_sem);
264 strncpy(system_utsname.nodename, nodename, len);
265 nodename[__NEW_UTS_LEN] = '\0';
266 strlcpy(system_utsname.nodename, nodename,
267 sizeof(system_utsname.nodename));
272 case MIPS_ATOMIC_SET:
273 printk(KERN_CRIT "How did I get here?\n");
277 tmp = current->thread.mflags & ~3;
278 current->thread.mflags = tmp | (arg1 & 3);
293 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
295 * This is really horribly ugly.
297 asmlinkage int sys_ipc (uint call, int first, int second,
298 unsigned long third, void *ptr, long fifth)
302 version = call >> 16; /* hack for backward compatibility */
307 return sys_semtimedop (first, (struct sembuf *)ptr, second,
310 return sys_semtimedop (first, (struct sembuf *)ptr, second,
311 (const struct timespec __user *)fifth);
313 return sys_semget (first, second, third);
318 if (get_user(fourth.__pad, (void **) ptr))
320 return sys_semctl (first, second, third, fourth);
324 return sys_msgsnd (first, (struct msgbuf *) ptr,
329 struct ipc_kludge tmp;
333 if (copy_from_user(&tmp,
334 (struct ipc_kludge *) ptr,
337 return sys_msgrcv (first, tmp.msgp, second,
341 return sys_msgrcv (first,
342 (struct msgbuf *) ptr,
343 second, fifth, third);
346 return sys_msgget ((key_t) first, second);
348 return sys_msgctl (first, second, (struct msqid_ds *) ptr);
354 ret = do_shmat (first, (char *) ptr, second, &raddr);
357 return put_user (raddr, (ulong *) third);
359 case 1: /* iBCS2 emulator entry point */
360 if (!segment_eq(get_fs(), get_ds()))
362 return do_shmat (first, (char *) ptr, second, (ulong *) third);
365 return sys_shmdt ((char *)ptr);
367 return sys_shmget (first, second, third);
369 return sys_shmctl (first, second,
370 (struct shmid_ds *) ptr);
377 * No implemented yet ...
379 asmlinkage int sys_cachectl(char *addr, int nbytes, int op)
385 * If we ever come here the user sp is bad. Zap the process right away.
386 * Due to the bad stack signaling wouldn't work.
388 asmlinkage void bad_stack(void)