1 files changed, 35 insertions, 75 deletions

diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c
index ce6828fd396..0d7103c9eff 100644
--- a/arch/um/kernel/exec.c
+++ b/arch/um/kernel/exec.c
@@ -1,90 +1,50 @@
 /*
- * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Licensed under the GPL
  */
 
-#include "linux/slab.h"
-#include "linux/smp_lock.h"
-#include "linux/ptrace.h"
-#include "linux/fs.h"
-#include "asm/ptrace.h"
-#include "asm/pgtable.h"
-#include "asm/tlbflush.h"
-#include "asm/uaccess.h"
-#include "kern_util.h"
-#include "as-layout.h"
-#include "mem_user.h"
-#include "kern.h"
-#include "irq_user.h"
-#include "tlb.h"
-#include "os.h"
-#include "choose-mode.h"
-#include "mode_kern.h"
+#include <linux/stddef.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/ptrace.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <asm/current.h>
+#include <asm/processor.h>
+#include <asm/uaccess.h>
+#include <as-layout.h>
+#include <mem_user.h>
+#include <skas.h>
+#include <os.h>
 
 void flush_thread(void)
 {
+	void *data = NULL;
+	int ret;
+
 	arch_flush_thread(&current->thread.arch);
-	CHOOSE_MODE(flush_thread_tt(), flush_thread_skas());
-}
 
-void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
-{
-	CHOOSE_MODE_PROC(start_thread_tt, start_thread_skas, regs, eip, esp);
+	ret = unmap(&current->mm->context.id, 0, STUB_START, 0, &data);
+	ret = ret || unmap(&current->mm->context.id, STUB_END,
+			   host_task_size - STUB_END, 1, &data);
+	if (ret) {
+		printk(KERN_ERR "flush_thread - clearing address space failed, "
+		       "err = %d\n", ret);
+		force_sig(SIGKILL, current);
+	}
+	get_safe_registers(current_pt_regs()->regs.gp,
+			   current_pt_regs()->regs.fp);
+
+	__switch_mm(&current->mm->context.id);
 }
 
-#ifdef CONFIG_TTY_LOG
-extern void log_exec(char **argv, void *tty);
-#endif
-
-static long execve1(char *file, char __user * __user *argv,
-		    char __user *__user *env)
+void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
 {
-        long error;
-#ifdef CONFIG_TTY_LOG
-	struct tty_struct *tty;
-
-	mutex_lock(&tty_mutex);
-	tty = get_current_tty();
-	if (tty)
-		log_exec(argv, tty);
-	mutex_unlock(&tty_mutex);
-#endif
-        error = do_execve(file, argv, env, &current->thread.regs);
-        if (error == 0){
-		task_lock(current);
-                current->ptrace &= ~PT_DTRACE;
+	PT_REGS_IP(regs) = eip;
+	PT_REGS_SP(regs) = esp;
+	current->ptrace &= ~PT_DTRACE;
 #ifdef SUBARCH_EXECVE1
-		SUBARCH_EXECVE1(&current->thread.regs.regs);
+	SUBARCH_EXECVE1(regs->regs);
 #endif
-		task_unlock(current);
-                set_cmdline(current_cmd());
-        }
-        return(error);
-}
-
-long um_execve(char *file, char __user *__user *argv, char __user *__user *env)
-{
-	long err;
-
-	err = execve1(file, argv, env);
-	if(!err)
-		do_longjmp(current->thread.exec_buf, 1);
-	return(err);
-}
-
-long sys_execve(char __user *file, char __user *__user *argv,
-		char __user *__user *env)
-{
-	long error;
-	char *filename;
-
-	lock_kernel();
-	filename = getname(file);
-	error = PTR_ERR(filename);
-	if (IS_ERR(filename)) goto out;
-	error = execve1(filename, argv, env);
-	putname(filename);
- out:
-	unlock_kernel();
-	return(error);
 }
+EXPORT_SYMBOL(start_thread);