* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
* Copyright (C) 2001 MIPS Technologies, Inc.
*/
-#include <linux/a.out.h>
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/linkage.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/compiler.h>
#include <linux/module.h>
#include <linux/ipc.h>
+#include <linux/uaccess.h>
+#include <linux/slab.h>
+#include <asm/asm.h>
#include <asm/branch.h>
#include <asm/cachectl.h>
#include <asm/cacheflush.h>
* We do not accept a shared mapping if it would violate
* cache aliasing constraints.
*/
- if ((flags & MAP_SHARED) && (addr & shm_align_mask))
+ if ((flags & MAP_SHARED) &&
+ ((addr - (pgoff << PAGE_SHIFT)) & shm_align_mask))
return -EINVAL;
return addr;
}
}
}
-/* 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(¤t->mm->mmap_sem);
- error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
- up_write(¤t->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)
+SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len,
+ unsigned long, prot, unsigned long, flags, unsigned long,
+ fd, off_t, offset)
{
unsigned long result;
if (offset & ~PAGE_MASK)
goto out;
- result = do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+ result = sys_mmap_pgoff(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)
+SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len,
+ unsigned long, prot, unsigned long, flags, unsigned long, fd,
+ unsigned long, pgoff)
{
if (pgoff & (~PAGE_MASK >> 12))
return -EINVAL;
- return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12));
+ return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12));
}
save_static_function(sys_fork);
return error;
}
-/*
- * Compacrapability ...
- */
-asmlinkage int sys_uname(struct old_utsname __user * name)
+SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
{
- if (name && !copy_to_user(name, utsname(), sizeof (*name)))
- return 0;
- return -EFAULT;
+ struct thread_info *ti = task_thread_info(current);
+
+ ti->tp_value = addr;
+ if (cpu_has_userlocal)
+ write_c0_userlocal(addr);
+
+ return 0;
}
-/*
- * Compacrapability ...
- */
-asmlinkage int sys_olduname(struct oldold_utsname __user * name)
+static inline int mips_atomic_set(struct pt_regs *regs,
+ unsigned long addr, unsigned long new)
{
- int error;
+ unsigned long old, tmp;
+ unsigned int err;
- if (!name)
- return -EFAULT;
- if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
- return -EFAULT;
-
- error = __copy_to_user(&name->sysname, &utsname()->sysname,
- __OLD_UTS_LEN);
- error -= __put_user(0, name->sysname + __OLD_UTS_LEN);
- error -= __copy_to_user(&name->nodename, &utsname()->nodename,
- __OLD_UTS_LEN);
- error -= __put_user(0, name->nodename + __OLD_UTS_LEN);
- error -= __copy_to_user(&name->release, &utsname()->release,
- __OLD_UTS_LEN);
- error -= __put_user(0, name->release + __OLD_UTS_LEN);
- error -= __copy_to_user(&name->version, &utsname()->version,
- __OLD_UTS_LEN);
- error -= __put_user(0, name->version + __OLD_UTS_LEN);
- error -= __copy_to_user(&name->machine, &utsname()->machine,
- __OLD_UTS_LEN);
- error = __put_user(0, name->machine + __OLD_UTS_LEN);
- error = error ? -EFAULT : 0;
+ if (unlikely(addr & 3))
+ return -EINVAL;
- return error;
-}
+ if (unlikely(!access_ok(VERIFY_WRITE, addr, 4)))
+ return -EINVAL;
-asmlinkage int sys_set_thread_area(unsigned long addr)
-{
- struct thread_info *ti = task_thread_info(current);
+ if (cpu_has_llsc && R10000_LLSC_WAR) {
+ __asm__ __volatile__ (
+ " .set mips3 \n"
+ " li %[err], 0 \n"
+ "1: ll %[old], (%[addr]) \n"
+ " move %[tmp], %[new] \n"
+ "2: sc %[tmp], (%[addr]) \n"
+ " beqzl %[tmp], 1b \n"
+ "3: \n"
+ " .section .fixup,\"ax\" \n"
+ "4: li %[err], %[efault] \n"
+ " j 3b \n"
+ " .previous \n"
+ " .section __ex_table,\"a\" \n"
+ " "STR(PTR)" 1b, 4b \n"
+ " "STR(PTR)" 2b, 4b \n"
+ " .previous \n"
+ " .set mips0 \n"
+ : [old] "=&r" (old),
+ [err] "=&r" (err),
+ [tmp] "=&r" (tmp)
+ : [addr] "r" (addr),
+ [new] "r" (new),
+ [efault] "i" (-EFAULT)
+ : "memory");
+ } else if (cpu_has_llsc) {
+ __asm__ __volatile__ (
+ " .set mips3 \n"
+ " li %[err], 0 \n"
+ "1: ll %[old], (%[addr]) \n"
+ " move %[tmp], %[new] \n"
+ "2: sc %[tmp], (%[addr]) \n"
+ " bnez %[tmp], 4f \n"
+ "3: \n"
+ " .subsection 2 \n"
+ "4: b 1b \n"
+ " .previous \n"
+ " \n"
+ " .section .fixup,\"ax\" \n"
+ "5: li %[err], %[efault] \n"
+ " j 3b \n"
+ " .previous \n"
+ " .section __ex_table,\"a\" \n"
+ " "STR(PTR)" 1b, 5b \n"
+ " "STR(PTR)" 2b, 5b \n"
+ " .previous \n"
+ " .set mips0 \n"
+ : [old] "=&r" (old),
+ [err] "=&r" (err),
+ [tmp] "=&r" (tmp)
+ : [addr] "r" (addr),
+ [new] "r" (new),
+ [efault] "i" (-EFAULT)
+ : "memory");
+ } else {
+ do {
+ preempt_disable();
+ ll_bit = 1;
+ ll_task = current;
+ preempt_enable();
+
+ err = __get_user(old, (unsigned int *) addr);
+ err |= __put_user(new, (unsigned int *) addr);
+ if (err)
+ break;
+ rmb();
+ } while (!ll_bit);
+ }
- ti->tp_value = addr;
- if (cpu_has_userlocal)
- write_c0_userlocal(addr);
+ if (unlikely(err))
+ return err;
- return 0;
+ regs->regs[2] = old;
+ regs->regs[7] = 0; /* No error */
+
+ /*
+ * Don't let your children do this ...
+ */
+ __asm__ __volatile__(
+ " move $29, %0 \n"
+ " j syscall_exit \n"
+ : /* no outputs */
+ : "r" (regs));
+
+ /* unreached. Honestly. */
+ while (1);
}
-asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
+save_static_function(sys_sysmips);
+static int __used noinline
+_sys_sysmips(nabi_no_regargs struct pt_regs regs)
{
+ long cmd, arg1, arg2, arg3;
+
+ cmd = regs.regs[4];
+ arg1 = regs.regs[5];
+ arg2 = regs.regs[6];
+ arg3 = regs.regs[7];
+
switch (cmd) {
case MIPS_ATOMIC_SET:
- printk(KERN_CRIT "How did I get here?\n");
- return -EINVAL;
+ return mips_atomic_set(®s, arg1, arg2);
case MIPS_FIXADE:
if (arg1 & ~3)
}
/*
- * sys_ipc() is the de-multiplexer for the SysV IPC calls..
- *
- * This is really horribly ugly.
- */
-asmlinkage int sys_ipc(unsigned int call, int first, int second,
- unsigned long third, void __user *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 __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 *__user *) ptr))
- return -EFAULT;
- return sys_semctl(first, second, third, fourth);
- }
-
- 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);
-
- case SHMAT:
- switch (version) {
- default: {
- unsigned long raddr;
- ret = do_shmat(first, (char __user *) ptr, second,
- &raddr);
- if (ret)
- return ret;
- return put_user(raddr, (unsigned long __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,
- (unsigned long *) 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 -ENOSYS;
- }
-}
-
-/*
* No implemented yet ...
*/
-asmlinkage int sys_cachectl(char *addr, int nbytes, int op)
+SYSCALL_DEFINE3(cachectl, char *, addr, int, nbytes, int, op)
{
return -ENOSYS;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff