Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / um / kernel / exec.c

diff --git a/kernel/arch/um/kernel/exec.c b/kernel/arch/um/kernel/exec.c
new file mode 100644 (file)
index 0000000..0d7103c
--- /dev/null
+++ b/kernel/arch/um/kernel/exec.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#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);
+
+       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);
+}
+
+void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
+{
+       PT_REGS_IP(regs) = eip;
+       PT_REGS_SP(regs) = esp;
+       current->ptrace &= ~PT_DTRACE;
+#ifdef SUBARCH_EXECVE1
+       SUBARCH_EXECVE1(regs->regs);
+#endif
+}
+EXPORT_SYMBOL(start_thread);