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/config.h>
11 #include <linux/a.out.h>
12 #include <linux/errno.h>
13 #include <linux/linkage.h>
15 #include <linux/smp.h>
16 #include <linux/smp_lock.h>
17 #include <linux/mman.h>
18 #include <linux/ptrace.h>
19 #include <linux/sched.h>
20 #include <linux/string.h>
21 #include <linux/syscalls.h>
22 #include <linux/file.h>
23 #include <linux/slab.h>
24 #include <linux/utsname.h>
25 #include <linux/unistd.h>
26 #include <linux/sem.h>
27 #include <linux/msg.h>
28 #include <linux/shm.h>
29 #include <linux/compiler.h>
30 #include <linux/module.h>
32 #include <asm/branch.h>
33 #include <asm/cachectl.h>
34 #include <asm/cacheflush.h>
36 #include <asm/asm-offsets.h>
37 #include <asm/signal.h>
39 #include <asm/shmparam.h>
40 #include <asm/sysmips.h>
41 #include <asm/uaccess.h>
43 asmlinkage int sys_pipe(nabi_no_regargs volatile struct pt_regs regs)
59 unsigned long shm_align_mask = PAGE_SIZE - 1; /* Sane caches */
61 EXPORT_SYMBOL(shm_align_mask);
63 #define COLOUR_ALIGN(addr,pgoff) \
64 ((((addr) + shm_align_mask) & ~shm_align_mask) + \
65 (((pgoff) << PAGE_SHIFT) & shm_align_mask))
67 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
68 unsigned long len, unsigned long pgoff, unsigned long flags)
70 struct vm_area_struct * vmm;
72 unsigned long task_size;
74 task_size = STACK_TOP;
76 if (flags & MAP_FIXED) {
78 * We do not accept a shared mapping if it would violate
79 * cache aliasing constraints.
81 if ((flags & MAP_SHARED) && (addr & shm_align_mask))
89 if (filp || (flags & MAP_SHARED))
93 addr = COLOUR_ALIGN(addr, pgoff);
95 addr = PAGE_ALIGN(addr);
96 vmm = find_vma(current->mm, addr);
97 if (task_size - len >= addr &&
98 (!vmm || addr + len <= vmm->vm_start))
101 addr = TASK_UNMAPPED_BASE;
103 addr = COLOUR_ALIGN(addr, pgoff);
105 addr = PAGE_ALIGN(addr);
107 for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
108 /* At this point: (!vmm || addr < vmm->vm_end). */
109 if (task_size - len < addr)
111 if (!vmm || addr + len <= vmm->vm_start)
115 addr = COLOUR_ALIGN(addr, pgoff);
119 /* common code for old and new mmaps */
120 static inline unsigned long
121 do_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
122 unsigned long flags, unsigned long fd, unsigned long pgoff)
124 unsigned long error = -EBADF;
125 struct file * file = NULL;
127 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
128 if (!(flags & MAP_ANONYMOUS)) {
134 down_write(¤t->mm->mmap_sem);
135 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
136 up_write(¤t->mm->mmap_sem);
144 asmlinkage unsigned long
145 old_mmap(unsigned long addr, unsigned long len, int prot,
146 int flags, int fd, off_t offset)
148 unsigned long result;
151 if (offset & ~PAGE_MASK)
154 result = do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
160 asmlinkage unsigned long
161 sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
162 unsigned long flags, unsigned long fd, unsigned long pgoff)
164 return do_mmap2(addr, len, prot, flags, fd, pgoff);
167 save_static_function(sys_fork);
168 __attribute_used__ noinline static int
169 _sys_fork(nabi_no_regargs struct pt_regs regs)
171 return do_fork(SIGCHLD, regs.regs[29], ®s, 0, NULL, NULL);
174 save_static_function(sys_clone);
175 __attribute_used__ noinline static int
176 _sys_clone(nabi_no_regargs struct pt_regs regs)
178 unsigned long clone_flags;
180 int __user *parent_tidptr, *child_tidptr;
182 clone_flags = regs.regs[4];
183 newsp = regs.regs[5];
185 newsp = regs.regs[29];
186 parent_tidptr = (int __user *) regs.regs[6];
188 /* We need to fetch the fifth argument off the stack. */
190 if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) {
191 int __user *__user *usp = (int __user *__user *) regs.regs[29];
192 if (regs.regs[2] == __NR_syscall) {
193 if (get_user (child_tidptr, &usp[5]))
196 else if (get_user (child_tidptr, &usp[4]))
200 child_tidptr = (int __user *) regs.regs[8];
202 return do_fork(clone_flags, newsp, ®s, 0,
203 parent_tidptr, child_tidptr);
207 * sys_execve() executes a new program.
209 asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
214 filename = getname((char *) (long)regs.regs[4]);
215 error = PTR_ERR(filename);
216 if (IS_ERR(filename))
218 error = do_execve(filename, (char **) (long)regs.regs[5],
219 (char **) (long)regs.regs[6], ®s);
227 * Compacrapability ...
229 asmlinkage int sys_uname(struct old_utsname * name)
231 if (name && !copy_to_user(name, &system_utsname, sizeof (*name)))
237 * Compacrapability ...
239 asmlinkage int sys_olduname(struct oldold_utsname * name)
245 if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
248 error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
249 error -= __put_user(0,name->sysname+__OLD_UTS_LEN);
250 error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
251 error -= __put_user(0,name->nodename+__OLD_UTS_LEN);
252 error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
253 error -= __put_user(0,name->release+__OLD_UTS_LEN);
254 error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
255 error -= __put_user(0,name->version+__OLD_UTS_LEN);
256 error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
257 error = __put_user(0,name->machine+__OLD_UTS_LEN);
258 error = error ? -EFAULT : 0;
263 void sys_set_thread_area(unsigned long addr)
265 struct thread_info *ti = current->thread_info;
269 /* If some future MIPS implementation has this register in hardware,
270 * we will need to update it here (and in context switches). */
273 asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
280 char nodename[__NEW_UTS_LEN + 1];
282 if (!capable(CAP_SYS_ADMIN))
285 name = (char *) arg1;
287 len = strncpy_from_user(nodename, name, __NEW_UTS_LEN);
291 down_write(&uts_sem);
292 strncpy(system_utsname.nodename, nodename, len);
293 nodename[__NEW_UTS_LEN] = '\0';
294 strlcpy(system_utsname.nodename, nodename,
295 sizeof(system_utsname.nodename));
300 case MIPS_ATOMIC_SET:
301 printk(KERN_CRIT "How did I get here?\n");
305 tmp = current->thread.mflags & ~3;
306 current->thread.mflags = tmp | (arg1 & 3);
321 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
323 * This is really horribly ugly.
325 asmlinkage int sys_ipc (uint call, int first, int second,
326 unsigned long third, void *ptr, long fifth)
330 version = call >> 16; /* hack for backward compatibility */
335 return sys_semtimedop (first, (struct sembuf *)ptr, second,
338 return sys_semtimedop (first, (struct sembuf *)ptr, second,
339 (const struct timespec __user *)fifth);
341 return sys_semget (first, second, third);
346 if (get_user(fourth.__pad, (void **) ptr))
348 return sys_semctl (first, second, third, fourth);
352 return sys_msgsnd (first, (struct msgbuf *) ptr,
357 struct ipc_kludge tmp;
361 if (copy_from_user(&tmp,
362 (struct ipc_kludge *) ptr,
365 return sys_msgrcv (first, tmp.msgp, second,
369 return sys_msgrcv (first,
370 (struct msgbuf *) ptr,
371 second, fifth, third);
374 return sys_msgget ((key_t) first, second);
376 return sys_msgctl (first, second, (struct msqid_ds *) ptr);
382 ret = do_shmat (first, (char *) ptr, second, &raddr);
385 return put_user (raddr, (ulong *) third);
387 case 1: /* iBCS2 emulator entry point */
388 if (!segment_eq(get_fs(), get_ds()))
390 return do_shmat (first, (char *) ptr, second, (ulong *) third);
393 return sys_shmdt ((char *)ptr);
395 return sys_shmget (first, second, third);
397 return sys_shmctl (first, second,
398 (struct shmid_ds *) ptr);
405 * No implemented yet ...
407 asmlinkage int sys_cachectl(char *addr, int nbytes, int op)
413 * If we ever come here the user sp is bad. Zap the process right away.
414 * Due to the bad stack signaling wouldn't work.
416 asmlinkage void bad_stack(void)