1 files changed, 87 insertions, 0 deletions
diff --git a/arch/um/kernel/tt/exec_kern.c b/arch/um/kernel/tt/exec_kern.c
new file mode 100644
index 00000000000..065b504a653
--- /dev/null
+++ b/arch/um/kernel/tt/exec_kern.c
@@ -0,0 +1,87 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/kernel.h"
+#include "linux/mm.h"
+#include "asm/signal.h"
+#include "asm/ptrace.h"
+#include "asm/uaccess.h"
+#include "asm/pgalloc.h"
+#include "asm/tlbflush.h"
+#include "user_util.h"
+#include "kern_util.h"
+#include "irq_user.h"
+#include "time_user.h"
+#include "signal_user.h"
+#include "mem_user.h"
+#include "os.h"
+#include "tlb.h"
+#include "mode.h"
+
+static int exec_tramp(void *sig_stack)
+{
+	init_new_thread_stack(sig_stack, NULL);
+	init_new_thread_signals(1);
+	os_stop_process(os_getpid());
+	return(0);
+}
+
+void flush_thread_tt(void)
+{
+	unsigned long stack;
+	int new_pid;
+
+	stack = alloc_stack(0, 0);
+	if(stack == 0){
+		printk(KERN_ERR 
+		       "flush_thread : failed to allocate temporary stack\n");
+		do_exit(SIGKILL);
+	}
+		
+	new_pid = start_fork_tramp(current->thread_info, stack, 0, exec_tramp);
+	if(new_pid < 0){
+		printk(KERN_ERR 
+		       "flush_thread : new thread failed, errno = %d\n",
+		       -new_pid);
+		do_exit(SIGKILL);
+	}
+
+	if(current_thread->cpu == 0)
+		forward_interrupts(new_pid);
+	current->thread.request.op = OP_EXEC;
+	current->thread.request.u.exec.pid = new_pid;
+	unprotect_stack((unsigned long) current_thread);
+	os_usr1_process(os_getpid());
+	change_sig(SIGUSR1, 1);
+
+	change_sig(SIGUSR1, 0);
+	enable_timer();
+	free_page(stack);
+	protect_memory(uml_reserved, high_physmem - uml_reserved, 1, 1, 0, 1);
+	task_protections((unsigned long) current_thread);
+	force_flush_all();
+	unblock_signals();
+}
+
+void start_thread_tt(struct pt_regs *regs, unsigned long eip, 
+		     unsigned long esp)
+{
+	set_fs(USER_DS);
+	flush_tlb_mm(current->mm);
+	PT_REGS_IP(regs) = eip;
+	PT_REGS_SP(regs) = esp;
+	PT_FIX_EXEC_STACK(esp);
+}
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */