/*
- * linux/arch/ppc64/kernel/sys_ppc.c
+ * Implementation of various system calls for Linux/PowerPC
*
- * PowerPC version
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
*
* Derived from "arch/i386/kernel/sys_i386.c"
*
* This is really horribly ugly.
*/
-asmlinkage int
-sys_ipc (uint call, int first, unsigned long second, long third,
- void __user *ptr, long fifth)
+int sys_ipc(uint call, int first, unsigned long second, long third,
+ void __user *ptr, long fifth)
{
int version, ret;
}
case MSGSND:
ret = sys_msgsnd(first, (struct msgbuf __user *)ptr,
- (size_t)second, third);
+ (size_t)second, third);
break;
case MSGRCV:
switch (version) {
}
break;
case MSGGET:
- ret = sys_msgget ((key_t)first, (int)second);
+ ret = sys_msgget((key_t)first, (int)second);
break;
case MSGCTL:
ret = sys_msgctl(first, (int)second,
(struct msqid_ds __user *)ptr);
break;
- case SHMAT:
- switch (version) {
- default: {
- ulong raddr;
- ret = do_shmat(first, (char __user *) ptr,
- (int)second, &raddr);
- if (ret)
- break;
- ret = put_user (raddr, (ulong __user *) third);
- break;
- }
- case 1: /* iBCS2 emulator entry point */
- ret = -EINVAL;
- if (!segment_eq(get_fs(), get_ds()))
- break;
- ret = do_shmat(first, (char __user *)ptr,
- (int)second, (ulong *)third);
+ case SHMAT: {
+ ulong raddr;
+ ret = do_shmat(first, (char __user *)ptr, (int)second, &raddr);
+ if (ret)
break;
- }
+ ret = put_user(raddr, (ulong __user *) third);
break;
- case SHMDT:
- ret = sys_shmdt ((char __user *)ptr);
+ }
+ case SHMDT:
+ ret = sys_shmdt((char __user *)ptr);
break;
case SHMGET:
- ret = sys_shmget (first, (size_t)second, third);
+ ret = sys_shmget(first, (size_t)second, third);
break;
case SHMCTL:
ret = sys_shmctl(first, (int)second,
- (struct shmid_ds __user *)ptr);
+ (struct shmid_ds __user *)ptr);
break;
}
* 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(int __user *fildes)
+int sys_pipe(int __user *fildes)
{
int fd[2];
int error;
-
+
error = do_pipe(fd);
if (!error) {
if (copy_to_user(fildes, fd, 2*sizeof(int)))
error = -EFAULT;
}
-
return error;
}
-unsigned long sys_mmap(unsigned long addr, size_t len,
- unsigned long prot, unsigned long flags,
- unsigned long fd, off_t offset)
+static inline unsigned long do_mmap2(unsigned long addr, size_t len,
+ unsigned long prot, unsigned long flags,
+ unsigned long fd, unsigned long off, int shift)
{
struct file * file = NULL;
- unsigned long ret = -EBADF;
+ int ret = -EINVAL;
+ if (shift) {
+ if (off & ((1 << shift) - 1))
+ goto out;
+ off >>= shift;
+ }
+
+ ret = -EBADF;
if (!(flags & MAP_ANONYMOUS)) {
if (!(file = fget(fd)))
goto out;
}
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+
down_write(¤t->mm->mmap_sem);
- ret = do_mmap(file, addr, len, prot, flags, offset);
+ ret = do_mmap_pgoff(file, addr, len, prot, flags, off);
up_write(¤t->mm->mmap_sem);
if (file)
fput(file);
-
out:
return ret;
}
+unsigned long sys_mmap2(unsigned long addr, size_t len,
+ unsigned long prot, unsigned long flags,
+ unsigned long fd, unsigned long pgoff)
+{
+ return do_mmap2(addr, len, prot, flags, fd, pgoff, PAGE_SHIFT-12);
+}
+
+unsigned long sys_mmap(unsigned long addr, size_t len,
+ unsigned long prot, unsigned long flags,
+ unsigned long fd, off_t offset)
+{
+ return do_mmap2(addr, len, prot, flags, fd, offset, PAGE_SHIFT);
+}
+
+#ifdef CONFIG_PPC32
+/*
+ * Due to some executables calling the wrong select we sometimes
+ * get wrong args. This determines how the args are being passed
+ * (a single ptr to them all args passed) then calls
+ * sys_select() with the appropriate args. -- Cort
+ */
+int
+ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct timeval __user *tvp)
+{
+ if ( (unsigned long)n >= 4096 )
+ {
+ unsigned long __user *buffer = (unsigned long __user *)n;
+ if (!access_ok(VERIFY_READ, buffer, 5*sizeof(unsigned long))
+ || __get_user(n, buffer)
+ || __get_user(inp, ((fd_set __user * __user *)(buffer+1)))
+ || __get_user(outp, ((fd_set __user * __user *)(buffer+2)))
+ || __get_user(exp, ((fd_set __user * __user *)(buffer+3)))
+ || __get_user(tvp, ((struct timeval __user * __user *)(buffer+4))))
+ return -EFAULT;
+ }
+ return sys_select(n, inp, outp, exp, tvp);
+}
+#endif
+
+#ifdef CONFIG_PPC64
long ppc64_personality(unsigned long personality)
{
long ret;
ret = PER_LINUX;
return ret;
}
+#endif
+
+#ifdef CONFIG_PPC64
+#define OVERRIDE_MACHINE (personality(current->personality) == PER_LINUX32)
+#else
+#define OVERRIDE_MACHINE 0
+#endif
-long ppc64_newuname(struct new_utsname __user * name)
+static inline int override_machine(char *mach)
+{
+ if (OVERRIDE_MACHINE) {
+ /* change ppc64 to ppc */
+ if (__put_user(0, mach+3) || __put_user(0, mach+4))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+long ppc_newuname(struct new_utsname __user * name)
{
int err = 0;
if (copy_to_user(name, &system_utsname, sizeof(*name)))
err = -EFAULT;
up_read(&uts_sem);
- if (!err && personality(current->personality) == PER_LINUX32) {
- /* change ppc64 to ppc */
- if (__put_user(0, name->machine + 3)
- || __put_user(0, name->machine + 4))
- err = -EFAULT;
- }
+ if (!err)
+ err = override_machine(name->machine);
return err;
}
-asmlinkage time_t sys64_time(time_t __user * tloc)
+int sys_uname(struct old_utsname __user *name)
+{
+ int err = 0;
+
+ down_read(&uts_sem);
+ if (copy_to_user(name, &system_utsname, sizeof(*name)))
+ err = -EFAULT;
+ up_read(&uts_sem);
+ if (!err)
+ err = override_machine(name->machine);
+ return err;
+}
+
+int sys_olduname(struct oldold_utsname __user *name)
+{
+ int error;
+
+ if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
+ return -EFAULT;
+
+ down_read(&uts_sem);
+ 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 |= override_machine(name->machine);
+ up_read(&uts_sem);
+
+ return error? -EFAULT: 0;
+}
+
+#ifdef CONFIG_PPC64
+time_t sys64_time(time_t __user * tloc)
{
time_t secs;
time_t usecs;
return secs;
}
+#endif
void do_show_syscall(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7, unsigned long r8,