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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/um/kernel/exec.c
Initial import
Diffstat (limited to 'arch/um/kernel/exec.c')
-rw-r--r--arch/um/kernel/exec.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c
new file mode 100644
index 000000000..0d7103c9e
--- /dev/null
+++ b/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);