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/capability.h>
12 #include <linux/errno.h>
13 #include <linux/linkage.h>
15 #include <linux/smp.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>
29 #include <linux/module.h>
31 #include <asm/branch.h>
32 #include <asm/cachectl.h>
33 #include <asm/cacheflush.h>
35 #include <asm/asm-offsets.h>
36 #include <asm/signal.h>
38 #include <asm/shmparam.h>
39 #include <asm/sysmips.h>
40 #include <asm/uaccess.h>
42 asmlinkage int sys_pipe(nabi_no_regargs volatile struct pt_regs regs)
58 unsigned long shm_align_mask = PAGE_SIZE - 1; /* Sane caches */
60 EXPORT_SYMBOL(shm_align_mask);
62 #define COLOUR_ALIGN(addr,pgoff) \
63 ((((addr) + shm_align_mask) & ~shm_align_mask) + \
64 (((pgoff) << PAGE_SHIFT) & shm_align_mask))
66 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
67 unsigned long len, unsigned long pgoff, unsigned long flags)
69 struct vm_area_struct * vmm;
71 unsigned long task_size;
73 task_size = STACK_TOP;
75 if (flags & MAP_FIXED) {
77 * We do not accept a shared mapping if it would violate
78 * cache aliasing constraints.
80 if ((flags & MAP_SHARED) && (addr & shm_align_mask))
88 if (filp || (flags & MAP_SHARED))
92 addr = COLOUR_ALIGN(addr, pgoff);
94 addr = PAGE_ALIGN(addr);
95 vmm = find_vma(current->mm, addr);
96 if (task_size - len >= addr &&
97 (!vmm || addr + len <= vmm->vm_start))
100 addr = TASK_UNMAPPED_BASE;
102 addr = COLOUR_ALIGN(addr, pgoff);
104 addr = PAGE_ALIGN(addr);
106 for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
107 /* At this point: (!vmm || addr < vmm->vm_end). */
108 if (task_size - len < addr)
110 if (!vmm || addr + len <= vmm->vm_start)
114 addr = COLOUR_ALIGN(addr, pgoff);
118 /* common code for old and new mmaps */
119 static inline unsigned long
120 do_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
121 unsigned long flags, unsigned long fd, unsigned long pgoff)
123 unsigned long error = -EBADF;
124 struct file * file = NULL;
126 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
127 if (!(flags & MAP_ANONYMOUS)) {
133 down_write(¤t->mm->mmap_sem);
134 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
135 up_write(¤t->mm->mmap_sem);
143 asmlinkage unsigned long
144 old_mmap(unsigned long addr, unsigned long len, int prot,
145 int flags, int fd, off_t offset)
147 unsigned long result;
150 if (offset & ~PAGE_MASK)
153 result = do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
159 asmlinkage unsigned long
160 sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
161 unsigned long flags, unsigned long fd, unsigned long pgoff)
163 if (pgoff & (~PAGE_MASK >> 12))
166 return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12));
169 save_static_function(sys_fork);
170 __attribute_used__ noinline static int
171 _sys_fork(nabi_no_regargs struct pt_regs regs)
173 return do_fork(SIGCHLD, regs.regs[29], ®s, 0, NULL, NULL);
176 save_static_function(sys_clone);
177 __attribute_used__ noinline static int
178 _sys_clone(nabi_no_regargs struct pt_regs regs)
180 unsigned long clone_flags;
182 int __user *parent_tidptr, *child_tidptr;
184 clone_flags = regs.regs[4];
185 newsp = regs.regs[5];
187 newsp = regs.regs[29];
188 parent_tidptr = (int __user *) regs.regs[6];
190 /* We need to fetch the fifth argument off the stack. */
192 if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) {
193 int __user *__user *usp = (int __user *__user *) regs.regs[29];
194 if (regs.regs[2] == __NR_syscall) {
195 if (get_user (child_tidptr, &usp[5]))
198 else if (get_user (child_tidptr, &usp[4]))
202 child_tidptr = (int __user *) regs.regs[8];
204 return do_fork(clone_flags, newsp, ®s, 0,
205 parent_tidptr, child_tidptr);
209 * sys_execve() executes a new program.
211 asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
216 filename = getname((char __user *) (long)regs.regs[4]);
217 error = PTR_ERR(filename);
218 if (IS_ERR(filename))
220 error = do_execve(filename, (char __user *__user *) (long)regs.regs[5],
221 (char __user *__user *) (long)regs.regs[6], ®s);
229 * Compacrapability ...
231 asmlinkage int sys_uname(struct old_utsname __user * name)
233 if (name && !copy_to_user(name, utsname(), sizeof (*name)))
239 * Compacrapability ...
241 asmlinkage int sys_olduname(struct oldold_utsname __user * name)
247 if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
250 error = __copy_to_user(&name->sysname, &utsname()->sysname,
252 error -= __put_user(0, name->sysname + __OLD_UTS_LEN);
253 error -= __copy_to_user(&name->nodename, &utsname()->nodename,
255 error -= __put_user(0, name->nodename + __OLD_UTS_LEN);
256 error -= __copy_to_user(&name->release, &utsname()->release,
258 error -= __put_user(0, name->release + __OLD_UTS_LEN);
259 error -= __copy_to_user(&name->version, &utsname()->version,
261 error -= __put_user(0, name->version + __OLD_UTS_LEN);
262 error -= __copy_to_user(&name->machine, &utsname()->machine,
264 error = __put_user(0, name->machine + __OLD_UTS_LEN);
265 error = error ? -EFAULT : 0;
270 asmlinkage int sys_set_thread_area(unsigned long addr)
272 struct thread_info *ti = task_thread_info(current);
276 /* If some future MIPS implementation has this register in hardware,
277 * we will need to update it here (and in context switches). */
282 asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
287 case MIPS_ATOMIC_SET:
288 printk(KERN_CRIT "How did I get here?\n");
292 tmp = current->thread.mflags & ~3;
293 current->thread.mflags = tmp | (arg1 & 3);
305 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
307 * This is really horribly ugly.
309 asmlinkage int sys_ipc (unsigned int call, int first, int second,
310 unsigned long third, void __user *ptr, long fifth)
314 version = call >> 16; /* hack for backward compatibility */
319 return sys_semtimedop (first, (struct sembuf __user *)ptr,
322 return sys_semtimedop (first, (struct sembuf __user *)ptr,
324 (const struct timespec __user *)fifth);
326 return sys_semget (first, second, third);
331 if (get_user(fourth.__pad, (void __user *__user *) ptr))
333 return sys_semctl (first, second, third, fourth);
337 return sys_msgsnd (first, (struct msgbuf __user *) ptr,
342 struct ipc_kludge tmp;
346 if (copy_from_user(&tmp,
347 (struct ipc_kludge __user *) ptr,
350 return sys_msgrcv (first, tmp.msgp, second,
354 return sys_msgrcv (first,
355 (struct msgbuf __user *) ptr,
356 second, fifth, third);
359 return sys_msgget ((key_t) first, second);
361 return sys_msgctl (first, second,
362 (struct msqid_ds __user *) ptr);
368 ret = do_shmat (first, (char __user *) ptr, second,
372 return put_user (raddr, (unsigned long __user *) third);
374 case 1: /* iBCS2 emulator entry point */
375 if (!segment_eq(get_fs(), get_ds()))
377 return do_shmat (first, (char __user *) ptr, second,
378 (unsigned long *) third);
381 return sys_shmdt ((char __user *)ptr);
383 return sys_shmget (first, second, third);
385 return sys_shmctl (first, second,
386 (struct shmid_ds __user *) ptr);
393 * No implemented yet ...
395 asmlinkage int sys_cachectl(char *addr, int nbytes, int op)
401 * If we ever come here the user sp is bad. Zap the process right away.
402 * Due to the bad stack signaling wouldn't work.
404 asmlinkage void bad_stack(void)
410 * Do a system call from kernel instead of calling sys_execve so we
411 * end up with proper pt_regs.
413 int kernel_execve(const char *filename, char *const argv[], char *const envp[])
415 register unsigned long __a0 asm("$4") = (unsigned long) filename;
416 register unsigned long __a1 asm("$5") = (unsigned long) argv;
417 register unsigned long __a2 asm("$6") = (unsigned long) envp;
418 register unsigned long __a3 asm("$7");
421 __asm__ volatile (" \n"
423 " li $2, %5 # __NR_execve \n"
427 : "=&r" (__v0), "=r" (__a3)
428 : "r" (__a0), "r" (__a1), "r" (__a2), "i" (__NR_execve)
429 : "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",