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>
16 #include <linux/smp.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 if (pgoff & (~PAGE_MASK >> 12))
167 return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12));
170 save_static_function(sys_fork);
171 static int __used noinline
172 _sys_fork(nabi_no_regargs struct pt_regs regs)
174 return do_fork(SIGCHLD, regs.regs[29], ®s, 0, NULL, NULL);
177 save_static_function(sys_clone);
178 static int __used noinline
179 _sys_clone(nabi_no_regargs struct pt_regs regs)
181 unsigned long clone_flags;
183 int __user *parent_tidptr, *child_tidptr;
185 clone_flags = regs.regs[4];
186 newsp = regs.regs[5];
188 newsp = regs.regs[29];
189 parent_tidptr = (int __user *) regs.regs[6];
191 /* We need to fetch the fifth argument off the stack. */
193 if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) {
194 int __user *__user *usp = (int __user *__user *) regs.regs[29];
195 if (regs.regs[2] == __NR_syscall) {
196 if (get_user (child_tidptr, &usp[5]))
199 else if (get_user (child_tidptr, &usp[4]))
203 child_tidptr = (int __user *) regs.regs[8];
205 return do_fork(clone_flags, newsp, ®s, 0,
206 parent_tidptr, child_tidptr);
210 * sys_execve() executes a new program.
212 asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
217 filename = getname((char __user *) (long)regs.regs[4]);
218 error = PTR_ERR(filename);
219 if (IS_ERR(filename))
221 error = do_execve(filename, (char __user *__user *) (long)regs.regs[5],
222 (char __user *__user *) (long)regs.regs[6], ®s);
230 * Compacrapability ...
232 asmlinkage int sys_uname(struct old_utsname __user * name)
234 if (name && !copy_to_user(name, utsname(), sizeof (*name)))
240 * Compacrapability ...
242 asmlinkage int sys_olduname(struct oldold_utsname __user * name)
248 if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
251 error = __copy_to_user(&name->sysname, &utsname()->sysname,
253 error -= __put_user(0, name->sysname + __OLD_UTS_LEN);
254 error -= __copy_to_user(&name->nodename, &utsname()->nodename,
256 error -= __put_user(0, name->nodename + __OLD_UTS_LEN);
257 error -= __copy_to_user(&name->release, &utsname()->release,
259 error -= __put_user(0, name->release + __OLD_UTS_LEN);
260 error -= __copy_to_user(&name->version, &utsname()->version,
262 error -= __put_user(0, name->version + __OLD_UTS_LEN);
263 error -= __copy_to_user(&name->machine, &utsname()->machine,
265 error = __put_user(0, name->machine + __OLD_UTS_LEN);
266 error = error ? -EFAULT : 0;
271 asmlinkage int sys_set_thread_area(unsigned long addr)
273 struct thread_info *ti = task_thread_info(current);
276 if (cpu_has_userlocal)
277 write_c0_userlocal(addr);
282 asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
285 case MIPS_ATOMIC_SET:
286 printk(KERN_CRIT "How did I get here?\n");
294 set_thread_flag(TIF_FIXADE);
296 clear_thread_flag(TIF_FIXADE);
298 set_thread_flag(TIF_LOGADE);
300 clear_thread_flag(TIF_FIXADE);
313 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
315 * This is really horribly ugly.
317 asmlinkage int sys_ipc(unsigned int call, int first, int second,
318 unsigned long third, void __user *ptr, long fifth)
322 version = call >> 16; /* hack for backward compatibility */
327 return sys_semtimedop(first, (struct sembuf __user *)ptr,
330 return sys_semtimedop(first, (struct sembuf __user *)ptr,
332 (const struct timespec __user *)fifth);
334 return sys_semget(first, second, third);
339 if (get_user(fourth.__pad, (void __user *__user *) ptr))
341 return sys_semctl(first, second, third, fourth);
345 return sys_msgsnd(first, (struct msgbuf __user *) ptr,
350 struct ipc_kludge tmp;
354 if (copy_from_user(&tmp,
355 (struct ipc_kludge __user *) ptr,
358 return sys_msgrcv(first, tmp.msgp, second,
362 return sys_msgrcv(first,
363 (struct msgbuf __user *) ptr,
364 second, fifth, third);
367 return sys_msgget((key_t) first, second);
369 return sys_msgctl(first, second,
370 (struct msqid_ds __user *) ptr);
376 ret = do_shmat(first, (char __user *) ptr, second,
380 return put_user(raddr, (unsigned long __user *) third);
382 case 1: /* iBCS2 emulator entry point */
383 if (!segment_eq(get_fs(), get_ds()))
385 return do_shmat(first, (char __user *) ptr, second,
386 (unsigned long *) third);
389 return sys_shmdt((char __user *)ptr);
391 return sys_shmget(first, second, third);
393 return sys_shmctl(first, second,
394 (struct shmid_ds __user *) ptr);
401 * No implemented yet ...
403 asmlinkage int sys_cachectl(char *addr, int nbytes, int op)
409 * If we ever come here the user sp is bad. Zap the process right away.
410 * Due to the bad stack signaling wouldn't work.
412 asmlinkage void bad_stack(void)
418 * Do a system call from kernel instead of calling sys_execve so we
419 * end up with proper pt_regs.
421 int kernel_execve(const char *filename, char *const argv[], char *const envp[])
423 register unsigned long __a0 asm("$4") = (unsigned long) filename;
424 register unsigned long __a1 asm("$5") = (unsigned long) argv;
425 register unsigned long __a2 asm("$6") = (unsigned long) envp;
426 register unsigned long __a3 asm("$7");
429 __asm__ volatile (" \n"
431 " li $2, %5 # __NR_execve \n"
435 : "=&r" (__v0), "=r" (__a3)
436 : "r" (__a0), "r" (__a1), "r" (__a2), "i" (__NR_execve)
437 : "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",