1 files changed, 289 insertions, 0 deletions

diff --git a/arch/sh/kernel/sys_sh.c b/arch/sh/kernel/sys_sh.c
new file mode 100644
index 000000000000..df5ac294c379
--- /dev/null
+++ b/arch/sh/kernel/sys_sh.c
@@ -0,0 +1,289 @@
+/*
+ * linux/arch/sh/kernel/sys_sh.c
+ *
+ * This file contains various random system calls that
+ * have a non-standard calling sequence on the Linux/SuperH
+ * platform.
+ *
+ * Taken from i386 version.
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/stat.h>
+#include <linux/syscalls.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+#include <linux/utsname.h>
+
+#include <asm/uaccess.h>
+#include <asm/ipc.h>
+
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way Unix traditionally does this, though.
+ */
+asmlinkage int sys_pipe(unsigned long r4, unsigned long r5,
+        unsigned long r6, unsigned long r7,
+        struct pt_regs regs)
+{
+        int fd[2];
+        int error;
+
+        error = do_pipe(fd);
+        if (!error) {
+                regs.regs[1] = fd[1];
+                return fd[0];
+        }
+        return error;
+}
+
+#if defined(HAVE_ARCH_UNMAPPED_AREA)
+/*
+ * To avoid cache alias, we map the shard page with same color.
+ */
+#define COLOUR_ALIGN(addr)      (((addr)+SHMLBA-1)&~(SHMLBA-1))
+
+unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
+        unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+        struct mm_struct *mm = current->mm;
+        struct vm_area_struct *vma;
+        unsigned long start_addr;
+
+        if (flags & MAP_FIXED) {
+                /* We do not accept a shared mapping if it would violate
+                 * cache aliasing constraints.
+                 */
+                if ((flags & MAP_SHARED) && (addr & (SHMLBA - 1)))
+                        return -EINVAL;
+                return addr;
+        }
+
+        if (len > TASK_SIZE)
+                return -ENOMEM;
+
+        if (addr) {
+                if (flags & MAP_PRIVATE)
+                        addr = PAGE_ALIGN(addr);
+                else
+                        addr = COLOUR_ALIGN(addr);
+                vma = find_vma(mm, addr);
+                if (TASK_SIZE - len >= addr &&
+                    (!vma || addr + len <= vma->vm_start))
+                        return addr;
+        }
+        if (flags & MAP_PRIVATE)
+                addr = PAGE_ALIGN(mm->free_area_cache);
+        else
+                addr = COLOUR_ALIGN(mm->free_area_cache);
+        start_addr = addr;
+
+full_search:
+        for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
+                /* At this point:  (!vma || addr < vma->vm_end). */
+                if (TASK_SIZE - len < addr) {
+                        /*
+                         * Start a new search - just in case we missed
+                         * some holes.
+                         */
+                        if (start_addr != TASK_UNMAPPED_BASE) {
+                                start_addr = addr = TASK_UNMAPPED_BASE;
+                                goto full_search;
+                        }
+                        return -ENOMEM;
+                }
+                if (!vma || addr + len <= vma->vm_start) {
+                        /*
+                         * Remember the place where we stopped the search:
+                         */
+                        mm->free_area_cache = addr + len;
+                        return addr;
+                }
+                addr = vma->vm_end;
+                if (!(flags & MAP_PRIVATE))
+                        addr = COLOUR_ALIGN(addr);
+        }
+}
+#endif
+
+static inline long
+do_mmap2(unsigned long addr, unsigned long len, unsigned long prot, 
+         unsigned long flags, int fd, unsigned long pgoff)
+{
+        int error = -EBADF;
+        struct file *file = NULL;
+
+        flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+        if (!(flags & MAP_ANONYMOUS)) {
+                file = fget(fd);
+                if (!file)
+                        goto out;
+        }
+
+        down_write(&current->mm->mmap_sem);
+        error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+        up_write(&current->mm->mmap_sem);
+
+        if (file)
+                fput(file);
+out:
+        return error;
+}
+
+asmlinkage int old_mmap(unsigned long addr, unsigned long len,
+        unsigned long prot, unsigned long flags,
+        int fd, unsigned long off)
+{
+        if (off & ~PAGE_MASK)
+                return -EINVAL;
+        return do_mmap2(addr, len, prot, flags, fd, off>>PAGE_SHIFT);
+}
+
+asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
+        unsigned long prot, unsigned long flags,
+        unsigned long fd, unsigned long pgoff)
+{
+        return do_mmap2(addr, len, prot, flags, fd, pgoff);
+}
+
+/*
+ * sys_ipc() is the de-multiplexer for the SysV IPC calls..
+ *
+ * This is really horribly ugly.
+ */
+asmlinkage int sys_ipc(uint call, int first, int second,
+                       int third, void __user *ptr, long fifth)
+{
+        int version, ret;
+
+        version = call >> 16; /* hack for backward compatibility */
+        call &= 0xffff;
+
+        if (call <= SEMCTL)
+                switch (call) {
+                case SEMOP:
+                        return sys_semtimedop(first, (struct sembuf __user *)ptr,
+                                              second, NULL);
+                case SEMTIMEDOP:
+                        return sys_semtimedop(first, (struct sembuf __user *)ptr,
+                                              second,
+                                              (const struct timespec __user *)fifth);
+                case SEMGET:
+                        return sys_semget (first, second, third);
+                case SEMCTL: {
+                        union semun fourth;
+                        if (!ptr)
+                                return -EINVAL;
+                        if (get_user(fourth.__pad, (void * __user *) ptr))
+                                return -EFAULT;
+                        return sys_semctl (first, second, third, fourth);
+                        }
+                default:
+                        return -EINVAL;
+                }
+
+        if (call <= MSGCTL) 
+                switch (call) {
+                case MSGSND:
+                        return sys_msgsnd (first, (struct msgbuf __user *) ptr, 
+                                          second, third);
+                case MSGRCV:
+                        switch (version) {
+                        case 0: {
+                                struct ipc_kludge tmp;
+                                if (!ptr)
+                                        return -EINVAL;
+                                
+                                if (copy_from_user(&tmp,
+                                                   (struct ipc_kludge __user *) ptr, 
+                                                   sizeof (tmp)))
+                                        return -EFAULT;
+                                return sys_msgrcv (first, tmp.msgp, second,
+                                                   tmp.msgtyp, third);
+                                }
+                        default:
+                                return sys_msgrcv (first,
+                                                   (struct msgbuf __user *) ptr,
+                                                   second, fifth, third);
+                        }
+                case MSGGET:
+                        return sys_msgget ((key_t) first, second);
+                case MSGCTL:
+                        return sys_msgctl (first, second,
+                                           (struct msqid_ds __user *) ptr);
+                default:
+                        return -EINVAL;
+                }
+        if (call <= SHMCTL) 
+                switch (call) {
+                case SHMAT:
+                        switch (version) {
+                        default: {
+                                ulong raddr;
+                                ret = do_shmat (first, (char __user *) ptr,
+                                                 second, &raddr);
+                                if (ret)
+                                        return ret;
+                                return put_user (raddr, (ulong __user *) third);
+                        }
+                        case 1: /* iBCS2 emulator entry point */
+                                if (!segment_eq(get_fs(), get_ds()))
+                                        return -EINVAL;
+                                return do_shmat (first, (char __user *) ptr,
+                                                  second, (ulong *) third);
+                        }
+                case SHMDT: 
+                        return sys_shmdt ((char __user *)ptr);
+                case SHMGET:
+                        return sys_shmget (first, second, third);
+                case SHMCTL:
+                        return sys_shmctl (first, second,
+                                           (struct shmid_ds __user *) ptr);
+                default:
+                        return -EINVAL;
+                }
+        
+        return -EINVAL;
+}
+
+asmlinkage int sys_uname(struct old_utsname * name)
+{
+        int err;
+        if (!name)
+                return -EFAULT;
+        down_read(&uts_sem);
+        err=copy_to_user(name, &system_utsname, sizeof (*name));
+        up_read(&uts_sem);
+        return err?-EFAULT:0;
+}
+
+asmlinkage ssize_t sys_pread_wrapper(unsigned int fd, char * buf,
+                             size_t count, long dummy, loff_t pos)
+{
+        return sys_pread64(fd, buf, count, pos);
+}
+
+asmlinkage ssize_t sys_pwrite_wrapper(unsigned int fd, const char * buf,
+                              size_t count, long dummy, loff_t pos)
+{
+        return sys_pwrite64(fd, buf, count, pos);
+}
+
+asmlinkage int sys_fadvise64_64_wrapper(int fd, u32 offset0, u32 offset1,
+                                u32 len0, u32 len1, int advice)
+{
+#ifdef  __LITTLE_ENDIAN__
+        return sys_fadvise64_64(fd, (u64)offset1 << 32 | offset0,
+                                (u64)len1 << 32 | len0, advice);
+#else
+        return sys_fadvise64_64(fd, (u64)offset0 << 32 | offset1,
+                                (u64)len0 << 32 | len1, advice);
+#endif
+}