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/*
* 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"
#include "internal.h"
void flush_thread(void)
{
void *data = NULL;
int ret;
arch_flush_thread(¤t->thread.arch);
ret = unmap(¤t->mm->context.id, 0, STUB_START, 0, &data);
ret = ret || unmap(¤t->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);
}
__switch_mm(¤t->mm->context.id);
}
void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
{
get_safe_registers(regs->regs.gp, regs->regs.fp);
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);
long um_execve(const char *file, const char __user *const __user *argv, const char __user *const __user *env)
{
long err;
err = do_execve(file, argv, env, ¤t->thread.regs);
if (!err)
UML_LONGJMP(current->thread.exec_buf, 1);
return err;
}
long sys_execve(const char __user *file, const char __user *const __user *argv,
const char __user *const __user *env)
{
long error;
char *filename;
filename = getname(file);
error = PTR_ERR(filename);
if (IS_ERR(filename)) goto out;
error = do_execve(filename, argv, env, ¤t->thread.regs);
putname(filename);
out:
return error;
}
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