2 * linux/arch/sh/kernel/sys_sh.c
4 * This file contains various random system calls that
5 * have a non-standard calling sequence on the Linux/SuperH
8 * Taken from i386 version.
11 #include <linux/errno.h>
12 #include <linux/sched.h>
14 #include <linux/smp.h>
15 #include <linux/smp_lock.h>
16 #include <linux/sem.h>
17 #include <linux/msg.h>
18 #include <linux/shm.h>
19 #include <linux/stat.h>
20 #include <linux/syscalls.h>
21 #include <linux/mman.h>
22 #include <linux/file.h>
23 #include <linux/utsname.h>
25 #include <asm/uaccess.h>
29 * sys_pipe() is the normal C calling standard for creating
30 * a pipe. It's not the way Unix traditionally does this, though.
32 asmlinkage int sys_pipe(unsigned long r4, unsigned long r5,
33 unsigned long r6, unsigned long r7,
47 #if defined(HAVE_ARCH_UNMAPPED_AREA)
49 * To avoid cache alias, we map the shard page with same color.
51 #define COLOUR_ALIGN(addr) (((addr)+SHMLBA-1)&~(SHMLBA-1))
53 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
54 unsigned long len, unsigned long pgoff, unsigned long flags)
56 struct mm_struct *mm = current->mm;
57 struct vm_area_struct *vma;
58 unsigned long start_addr;
60 if (flags & MAP_FIXED) {
61 /* We do not accept a shared mapping if it would violate
62 * cache aliasing constraints.
64 if ((flags & MAP_SHARED) && (addr & (SHMLBA - 1)))
73 if (flags & MAP_PRIVATE)
74 addr = PAGE_ALIGN(addr);
76 addr = COLOUR_ALIGN(addr);
77 vma = find_vma(mm, addr);
78 if (TASK_SIZE - len >= addr &&
79 (!vma || addr + len <= vma->vm_start))
82 if (flags & MAP_PRIVATE)
83 addr = PAGE_ALIGN(mm->free_area_cache);
85 addr = COLOUR_ALIGN(mm->free_area_cache);
89 for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
90 /* At this point: (!vma || addr < vma->vm_end). */
91 if (TASK_SIZE - len < addr) {
93 * Start a new search - just in case we missed
96 if (start_addr != TASK_UNMAPPED_BASE) {
97 start_addr = addr = TASK_UNMAPPED_BASE;
102 if (!vma || addr + len <= vma->vm_start) {
104 * Remember the place where we stopped the search:
106 mm->free_area_cache = addr + len;
110 if (!(flags & MAP_PRIVATE))
111 addr = COLOUR_ALIGN(addr);
117 do_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
118 unsigned long flags, int fd, unsigned long pgoff)
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 int old_mmap(unsigned long addr, unsigned long len,
141 unsigned long prot, unsigned long flags,
142 int fd, unsigned long off)
144 if (off & ~PAGE_MASK)
146 return do_mmap2(addr, len, prot, flags, fd, off>>PAGE_SHIFT);
149 asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
150 unsigned long prot, unsigned long flags,
151 unsigned long fd, unsigned long pgoff)
153 return do_mmap2(addr, len, prot, flags, fd, pgoff);
157 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
159 * This is really horribly ugly.
161 asmlinkage int sys_ipc(uint call, int first, int second,
162 int third, void __user *ptr, long fifth)
166 version = call >> 16; /* hack for backward compatibility */
172 return sys_semtimedop(first, (struct sembuf __user *)ptr,
175 return sys_semtimedop(first, (struct sembuf __user *)ptr,
177 (const struct timespec __user *)fifth);
179 return sys_semget (first, second, third);
184 if (get_user(fourth.__pad, (void * __user *) ptr))
186 return sys_semctl (first, second, third, fourth);
195 return sys_msgsnd (first, (struct msgbuf __user *) ptr,
200 struct ipc_kludge tmp;
204 if (copy_from_user(&tmp,
205 (struct ipc_kludge __user *) ptr,
208 return sys_msgrcv (first, tmp.msgp, second,
212 return sys_msgrcv (first,
213 (struct msgbuf __user *) ptr,
214 second, fifth, third);
217 return sys_msgget ((key_t) first, second);
219 return sys_msgctl (first, second,
220 (struct msqid_ds __user *) ptr);
230 ret = do_shmat (first, (char __user *) ptr,
234 return put_user (raddr, (ulong __user *) third);
236 case 1: /* iBCS2 emulator entry point */
237 if (!segment_eq(get_fs(), get_ds()))
239 return do_shmat (first, (char __user *) ptr,
240 second, (ulong *) third);
243 return sys_shmdt ((char __user *)ptr);
245 return sys_shmget (first, second, third);
247 return sys_shmctl (first, second,
248 (struct shmid_ds __user *) ptr);
256 asmlinkage int sys_uname(struct old_utsname * name)
262 err=copy_to_user(name, &system_utsname, sizeof (*name));
264 return err?-EFAULT:0;
267 asmlinkage ssize_t sys_pread_wrapper(unsigned int fd, char * buf,
268 size_t count, long dummy, loff_t pos)
270 return sys_pread64(fd, buf, count, pos);
273 asmlinkage ssize_t sys_pwrite_wrapper(unsigned int fd, const char * buf,
274 size_t count, long dummy, loff_t pos)
276 return sys_pwrite64(fd, buf, count, pos);
279 asmlinkage int sys_fadvise64_64_wrapper(int fd, u32 offset0, u32 offset1,
280 u32 len0, u32 len1, int advice)
282 #ifdef __LITTLE_ENDIAN__
283 return sys_fadvise64_64(fd, (u64)offset1 << 32 | offset0,
284 (u64)len1 << 32 | len0, advice);
286 return sys_fadvise64_64(fd, (u64)offset0 << 32 | offset1,
287 (u64)len0 << 32 | len1, advice);