X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=arch%2Fum%2Fsys-x86_64%2Fsyscalls.c;h=f1199fd34d383db5018f349ab811aaea5eb71197;hb=9fb5430c3d6e96a74fd4406dbe7608f36abb9987;hp=01b91f9fa7893647454f2a843f22a729197d78cb;hpb=a22a0fab32e1216df56e4b9a577dc5c922cf7524;p=linux-2.6-omap-h63xx.git

diff --git a/arch/um/sys-x86_64/syscalls.c b/arch/um/sys-x86_64/syscalls.c
index 01b91f9fa78..f1199fd34d3 100644
--- a/arch/um/sys-x86_64/syscalls.c
+++ b/arch/um/sys-x86_64/syscalls.c
@@ -1,70 +1,36 @@
 /*
+ * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Copyright 2003 PathScale, Inc.
  *
  * Licensed under the GPL
  */
 
 #include "linux/linkage.h"
-#include "linux/slab.h"
-#include "linux/shm.h"
-#include "linux/utsname.h"
 #include "linux/personality.h"
-#include "asm/uaccess.h"
-#define __FRAME_OFFSETS
-#include "asm/ptrace.h"
-#include "asm/unistd.h"
+#include "linux/utsname.h"
 #include "asm/prctl.h" /* XXX This should get the constants from libc */
-#include "choose-mode.h"
-#include "kern.h"
+#include "asm/uaccess.h"
 #include "os.h"
 
 asmlinkage long sys_uname64(struct new_utsname __user * name)
 {
 	int err;
+
 	down_read(&uts_sem);
 	err = copy_to_user(name, utsname(), sizeof (*name));
 	up_read(&uts_sem);
+
 	if (personality(current->personality) == PER_LINUX32)
 		err |= copy_to_user(&name->machine, "i686", 5);
-	return err ? -EFAULT : 0;
-}
 
-#ifdef CONFIG_MODE_TT
-extern long arch_prctl(int code, unsigned long addr);
-
-static long arch_prctl_tt(int code, unsigned long addr)
-{
-	unsigned long tmp;
-	long ret;
-
-	switch(code){
-	case ARCH_SET_GS:
-	case ARCH_SET_FS:
-		ret = arch_prctl(code, addr);
-		break;
-	case ARCH_GET_FS:
-	case ARCH_GET_GS:
-		ret = arch_prctl(code, (unsigned long) &tmp);
-		if(!ret)
-			ret = put_user(tmp, (long __user *)addr);
-		break;
-	default:
-		ret = -EINVAL;
-		break;
-	}
-
-	return(ret);
+	return err ? -EFAULT : 0;
 }
-#endif
 
-#ifdef CONFIG_MODE_SKAS
-
-long arch_prctl_skas(struct task_struct *task, int code,
-                     unsigned long __user *addr)
+long arch_prctl(struct task_struct *task, int code, unsigned long __user *addr)
 {
-        unsigned long *ptr = addr, tmp;
+	unsigned long *ptr = addr, tmp;
 	long ret;
-	int pid = task->mm->context.skas.id.u.pid;
+	int pid = task->mm->context.id.u.pid;
 
 	/*
 	 * With ARCH_SET_FS (and ARCH_SET_GS is treated similarly to
@@ -79,49 +45,52 @@ long arch_prctl_skas(struct task_struct *task, int code,
 	 * arch_prctl is run on the host, then the registers are read
 	 * back.
 	 */
-	switch(code){
+	switch (code) {
 	case ARCH_SET_FS:
 	case ARCH_SET_GS:
-                restore_registers(pid, &current->thread.regs.regs);
-                break;
-        case ARCH_GET_FS:
-        case ARCH_GET_GS:
-                /*
-                 * With these two, we read to a local pointer and
-                 * put_user it to the userspace pointer that we were
-                 * given.  If addr isn't valid (because it hasn't been
-                 * faulted in or is just bogus), we want put_user to
-                 * fault it in (or return -EFAULT) instead of having
-                 * the host return -EFAULT.
-                 */
-                ptr = &tmp;
-        }
+		ret = restore_registers(pid, &current->thread.regs.regs);
+		if (ret)
+			return ret;
+		break;
+	case ARCH_GET_FS:
+	case ARCH_GET_GS:
+		/*
+		 * With these two, we read to a local pointer and
+		 * put_user it to the userspace pointer that we were
+		 * given.  If addr isn't valid (because it hasn't been
+		 * faulted in or is just bogus), we want put_user to
+		 * fault it in (or return -EFAULT) instead of having
+		 * the host return -EFAULT.
+		 */
+		ptr = &tmp;
+	}
 
-        ret = os_arch_prctl(pid, code, ptr);
-        if(ret)
-                return ret;
+	ret = os_arch_prctl(pid, code, ptr);
+	if (ret)
+		return ret;
 
-        switch(code){
+	switch (code) {
 	case ARCH_SET_FS:
+		current->thread.arch.fs = (unsigned long) ptr;
+		ret = save_registers(pid, &current->thread.regs.regs);
+		break;
 	case ARCH_SET_GS:
-                save_registers(pid, &current->thread.regs.regs);
+		ret = save_registers(pid, &current->thread.regs.regs);
 		break;
 	case ARCH_GET_FS:
 		ret = put_user(tmp, addr);
-	        break;
+		break;
 	case ARCH_GET_GS:
 		ret = put_user(tmp, addr);
-	        break;
+		break;
 	}
 
 	return ret;
 }
-#endif
 
 long sys_arch_prctl(int code, unsigned long addr)
 {
-	return CHOOSE_MODE_PROC(arch_prctl_tt, arch_prctl_skas, current, code,
-                                (unsigned long __user *) addr);
+	return arch_prctl(current, code, (unsigned long __user *) addr);
 }
 
 long sys_clone(unsigned long clone_flags, unsigned long newsp,
@@ -138,11 +107,10 @@ long sys_clone(unsigned long clone_flags, unsigned long newsp,
 	return ret;
 }
 
-void arch_switch_to_skas(struct task_struct *from, struct task_struct *to)
+void arch_switch_to(struct task_struct *to)
 {
-        if(to->thread.arch.fs == 0)
-                return;
+	if ((to->thread.arch.fs == 0) || (to->mm == NULL))
+		return;
 
-        arch_prctl_skas(to, ARCH_SET_FS, (void __user *) to->thread.arch.fs);
+	arch_prctl(to, ARCH_SET_FS, (void __user *) to->thread.arch.fs);
 }
-