USB: ps3 ohci bus glue

[powerpc.git] / arch / mips / kernel / syscall.c

diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 9951240..26e1a7e 100644 (file)
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -231,7 +231,7 @@ out:
  */
 asmlinkage int sys_uname(struct old_utsname __user * name)
 {
-       if (name && !copy_to_user(name, &system_utsname, sizeof (*name)))
+       if (name && !copy_to_user(name, utsname(), sizeof (*name)))
                return 0;
        return -EFAULT;
 }
@@ -248,16 +248,21 @@ asmlinkage int sys_olduname(struct oldold_utsname __user * name)
        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 = __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;
 
        return error;
@@ -401,3 +406,32 @@ asmlinkage void bad_stack(void)
 {
        do_exit(SIGSEGV);
 }
+
+/*
+ * Do a system call from kernel instead of calling sys_execve so we
+ * end up with proper pt_regs.
+ */
+int kernel_execve(const char *filename, char *const argv[], char *const envp[])
+{
+       register unsigned long __a0 asm("$4") = (unsigned long) filename;
+       register unsigned long __a1 asm("$5") = (unsigned long) argv;
+       register unsigned long __a2 asm("$6") = (unsigned long) envp;
+       register unsigned long __a3 asm("$7");
+       unsigned long __v0;
+
+       __asm__ volatile ("                                     \n"
+       "       .set    noreorder                               \n"
+       "       li      $2, %5          # __NR_execve           \n"
+       "       syscall                                         \n"
+       "       move    %0, $2                                  \n"
+       "       .set    reorder                                 \n"
+       : "=&r" (__v0), "=r" (__a3)
+       : "r" (__a0), "r" (__a1), "r" (__a2), "i" (__NR_execve)
+       : "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",
+         "memory");
+
+       if (__a3 == 0)
+               return __v0;
+
+       return -__v0;
+}