You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99 lines
1.9 KiB
99 lines
1.9 KiB
/*
|
|
* Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include "linux/config.h"
|
|
#include "linux/slab.h"
|
|
#include "asm/uaccess.h"
|
|
#include "asm/ptrace.h"
|
|
#include "choose-mode.h"
|
|
#include "kern.h"
|
|
|
|
#ifdef CONFIG_MODE_TT
|
|
extern int modify_ldt(int func, void *ptr, unsigned long bytecount);
|
|
|
|
/* XXX this needs copy_to_user and copy_from_user */
|
|
|
|
int sys_modify_ldt_tt(int func, void __user *ptr, unsigned long bytecount)
|
|
{
|
|
if (!access_ok(VERIFY_READ, ptr, bytecount))
|
|
return -EFAULT;
|
|
|
|
return modify_ldt(func, ptr, bytecount);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_MODE_SKAS
|
|
extern int userspace_pid[];
|
|
|
|
#include "skas_ptrace.h"
|
|
|
|
int sys_modify_ldt_skas(int func, void __user *ptr, unsigned long bytecount)
|
|
{
|
|
struct ptrace_ldt ldt;
|
|
void *buf;
|
|
int res, n;
|
|
|
|
buf = kmalloc(bytecount, GFP_KERNEL);
|
|
if(buf == NULL)
|
|
return(-ENOMEM);
|
|
|
|
res = 0;
|
|
|
|
switch(func){
|
|
case 1:
|
|
case 0x11:
|
|
res = copy_from_user(buf, ptr, bytecount);
|
|
break;
|
|
}
|
|
|
|
if(res != 0){
|
|
res = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
ldt = ((struct ptrace_ldt) { .func = func,
|
|
.ptr = buf,
|
|
.bytecount = bytecount });
|
|
#warning Need to look up userspace_pid by cpu
|
|
res = ptrace(PTRACE_LDT, userspace_pid[0], 0, (unsigned long) &ldt);
|
|
if(res < 0)
|
|
goto out;
|
|
|
|
switch(func){
|
|
case 0:
|
|
case 2:
|
|
n = res;
|
|
res = copy_to_user(ptr, buf, n);
|
|
if(res != 0)
|
|
res = -EFAULT;
|
|
else
|
|
res = n;
|
|
break;
|
|
}
|
|
|
|
out:
|
|
kfree(buf);
|
|
return(res);
|
|
}
|
|
#endif
|
|
|
|
int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount)
|
|
{
|
|
return(CHOOSE_MODE_PROC(sys_modify_ldt_tt, sys_modify_ldt_skas, func,
|
|
ptr, bytecount));
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* 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:
|
|
*/
|
|
|