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-rw-r--r--arch/mips/kernel/syscall.c407
1 files changed, 407 insertions, 0 deletions
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
new file mode 100644
index 00000000000..598bfe7426a
--- /dev/null
+++ b/arch/mips/kernel/syscall.c
@@ -0,0 +1,407 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1995, 1996, 1997, 2000, 2001, 05 by Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2001 MIPS Technologies, Inc.
+ */
+#include <linux/a.out.h>
+#include <linux/errno.h>
+#include <linux/linkage.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/mman.h>
+#include <linux/ptrace.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/syscalls.h>
+#include <linux/file.h>
+#include <linux/slab.h>
+#include <linux/utsname.h>
+#include <linux/unistd.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/compiler.h>
+
+#include <asm/branch.h>
+#include <asm/cachectl.h>
+#include <asm/cacheflush.h>
+#include <asm/ipc.h>
+#include <asm/offset.h>
+#include <asm/signal.h>
+#include <asm/sim.h>
+#include <asm/shmparam.h>
+#include <asm/sysmips.h>
+#include <asm/uaccess.h>
+
+asmlinkage int sys_pipe(nabi_no_regargs volatile struct pt_regs regs)
+{
+ int fd[2];
+ int error, res;
+
+ error = do_pipe(fd);
+ if (error) {
+ res = error;
+ goto out;
+ }
+ regs.regs[3] = fd[1];
+ res = fd[0];
+out:
+ return res;
+}
+
+unsigned long shm_align_mask = PAGE_SIZE - 1; /* Sane caches */
+
+#define COLOUR_ALIGN(addr,pgoff) \
+ ((((addr) + shm_align_mask) & ~shm_align_mask) + \
+ (((pgoff) << PAGE_SHIFT) & shm_align_mask))
+
+unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
+ unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+ struct vm_area_struct * vmm;
+ int do_color_align;
+ unsigned long task_size;
+
+ task_size = STACK_TOP;
+
+ if (flags & MAP_FIXED) {
+ /*
+ * We do not accept a shared mapping if it would violate
+ * cache aliasing constraints.
+ */
+ if ((flags & MAP_SHARED) && (addr & shm_align_mask))
+ return -EINVAL;
+ return addr;
+ }
+
+ if (len > task_size)
+ return -ENOMEM;
+ do_color_align = 0;
+ if (filp || (flags & MAP_SHARED))
+ do_color_align = 1;
+ if (addr) {
+ if (do_color_align)
+ addr = COLOUR_ALIGN(addr, pgoff);
+ else
+ addr = PAGE_ALIGN(addr);
+ vmm = find_vma(current->mm, addr);
+ if (task_size - len >= addr &&
+ (!vmm || addr + len <= vmm->vm_start))
+ return addr;
+ }
+ addr = TASK_UNMAPPED_BASE;
+ if (do_color_align)
+ addr = COLOUR_ALIGN(addr, pgoff);
+ else
+ addr = PAGE_ALIGN(addr);
+
+ for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
+ /* At this point: (!vmm || addr < vmm->vm_end). */
+ if (task_size - len < addr)
+ return -ENOMEM;
+ if (!vmm || addr + len <= vmm->vm_start)
+ return addr;
+ addr = vmm->vm_end;
+ if (do_color_align)
+ addr = COLOUR_ALIGN(addr, pgoff);
+ }
+}
+
+/* common code for old and new mmaps */
+static inline unsigned long
+do_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
+ unsigned long flags, unsigned long fd, unsigned long pgoff)
+{
+ unsigned long 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 unsigned long
+old_mmap(unsigned long addr, unsigned long len, int prot,
+ int flags, int fd, off_t offset)
+{
+ unsigned long result;
+
+ result = -EINVAL;
+ if (offset & ~PAGE_MASK)
+ goto out;
+
+ result = do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+
+out:
+ return result;
+}
+
+asmlinkage unsigned 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);
+}
+
+save_static_function(sys_fork);
+__attribute_used__ noinline static int
+_sys_fork(nabi_no_regargs struct pt_regs regs)
+{
+ return do_fork(SIGCHLD, regs.regs[29], &regs, 0, NULL, NULL);
+}
+
+save_static_function(sys_clone);
+__attribute_used__ noinline static int
+_sys_clone(nabi_no_regargs struct pt_regs regs)
+{
+ unsigned long clone_flags;
+ unsigned long newsp;
+ int *parent_tidptr, *child_tidptr;
+
+ clone_flags = regs.regs[4];
+ newsp = regs.regs[5];
+ if (!newsp)
+ newsp = regs.regs[29];
+ parent_tidptr = (int *) regs.regs[6];
+ child_tidptr = (int *) regs.regs[7];
+ return do_fork(clone_flags, newsp, &regs, 0,
+ parent_tidptr, child_tidptr);
+}
+
+/*
+ * sys_execve() executes a new program.
+ */
+asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
+{
+ int error;
+ char * filename;
+
+ filename = getname((char *) (long)regs.regs[4]);
+ error = PTR_ERR(filename);
+ if (IS_ERR(filename))
+ goto out;
+ error = do_execve(filename, (char **) (long)regs.regs[5],
+ (char **) (long)regs.regs[6], &regs);
+ putname(filename);
+
+out:
+ return error;
+}
+
+/*
+ * Compacrapability ...
+ */
+asmlinkage int sys_uname(struct old_utsname * name)
+{
+ if (name && !copy_to_user(name, &system_utsname, sizeof (*name)))
+ return 0;
+ return -EFAULT;
+}
+
+/*
+ * Compacrapability ...
+ */
+asmlinkage int sys_olduname(struct oldold_utsname * name)
+{
+ int error;
+
+ if (!name)
+ return -EFAULT;
+ if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
+ return -EFAULT;
+
+ error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
+ error -= __put_user(0,name->sysname+__OLD_UTS_LEN);
+ error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
+ error -= __put_user(0,name->nodename+__OLD_UTS_LEN);
+ error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
+ error -= __put_user(0,name->release+__OLD_UTS_LEN);
+ error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
+ error -= __put_user(0,name->version+__OLD_UTS_LEN);
+ error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
+ error = __put_user(0,name->machine+__OLD_UTS_LEN);
+ error = error ? -EFAULT : 0;
+
+ return error;
+}
+
+asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
+{
+ int tmp, len;
+ char *name;
+
+ switch(cmd) {
+ case SETNAME: {
+ char nodename[__NEW_UTS_LEN + 1];
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ name = (char *) arg1;
+
+ len = strncpy_from_user(nodename, name, __NEW_UTS_LEN);
+ if (len < 0)
+ return -EFAULT;
+
+ down_write(&uts_sem);
+ strncpy(system_utsname.nodename, nodename, len);
+ nodename[__NEW_UTS_LEN] = '\0';
+ strlcpy(system_utsname.nodename, nodename,
+ sizeof(system_utsname.nodename));
+ up_write(&uts_sem);
+ return 0;
+ }
+
+ case MIPS_ATOMIC_SET:
+ printk(KERN_CRIT "How did I get here?\n");
+ return -EINVAL;
+
+ case MIPS_FIXADE:
+ tmp = current->thread.mflags & ~3;
+ current->thread.mflags = tmp | (arg1 & 3);
+ return 0;
+
+ case FLUSH_CACHE:
+ __flush_cache_all();
+ return 0;
+
+ case MIPS_RDNVRAM:
+ return -EIO;
+ }
+
+ return -EINVAL;
+}
+
+/*
+ * 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,
+ unsigned long third, void *ptr, long fifth)
+{
+ int version, ret;
+
+ version = call >> 16; /* hack for backward compatibility */
+ call &= 0xffff;
+
+ switch (call) {
+ case SEMOP:
+ return sys_semtimedop (first, (struct sembuf *)ptr, second,
+ NULL);
+ case SEMTIMEDOP:
+ return sys_semtimedop (first, (struct sembuf *)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 **) ptr))
+ return -EFAULT;
+ return sys_semctl (first, second, third, fourth);
+ }
+
+ case MSGSND:
+ return sys_msgsnd (first, (struct msgbuf *) 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 *) ptr,
+ sizeof (tmp)))
+ return -EFAULT;
+ return sys_msgrcv (first, tmp.msgp, second,
+ tmp.msgtyp, third);
+ }
+ default:
+ return sys_msgrcv (first,
+ (struct msgbuf *) ptr,
+ second, fifth, third);
+ }
+ case MSGGET:
+ return sys_msgget ((key_t) first, second);
+ case MSGCTL:
+ return sys_msgctl (first, second, (struct msqid_ds *) ptr);
+
+ case SHMAT:
+ switch (version) {
+ default: {
+ ulong raddr;
+ ret = do_shmat (first, (char *) ptr, second, &raddr);
+ if (ret)
+ return ret;
+ return put_user (raddr, (ulong *) third);
+ }
+ case 1: /* iBCS2 emulator entry point */
+ if (!segment_eq(get_fs(), get_ds()))
+ return -EINVAL;
+ return do_shmat (first, (char *) ptr, second, (ulong *) third);
+ }
+ case SHMDT:
+ return sys_shmdt ((char *)ptr);
+ case SHMGET:
+ return sys_shmget (first, second, third);
+ case SHMCTL:
+ return sys_shmctl (first, second,
+ (struct shmid_ds *) ptr);
+ default:
+ return -ENOSYS;
+ }
+}
+
+/*
+ * Native ABI that is O32 or N64 version
+ */
+asmlinkage long sys_shmat(int shmid, char __user *shmaddr,
+ int shmflg, unsigned long *addr)
+{
+ unsigned long raddr;
+ int err;
+
+ err = do_shmat(shmid, shmaddr, shmflg, &raddr);
+ if (err)
+ return err;
+
+ return put_user(raddr, addr);
+}
+
+/*
+ * No implemented yet ...
+ */
+asmlinkage int sys_cachectl(char *addr, int nbytes, int op)
+{
+ return -ENOSYS;
+}
+
+/*
+ * If we ever come here the user sp is bad. Zap the process right away.
+ * Due to the bad stack signaling wouldn't work.
+ */
+asmlinkage void bad_stack(void)
+{
+ do_exit(SIGSEGV);
+}
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