72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/*
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* Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
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* Licensed under the GPL
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*/
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#ifndef __TT_UACCESS_H
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#define __TT_UACCESS_H
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#include "linux/string.h"
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#include "linux/sched.h"
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#include "asm/processor.h"
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#include "asm/errno.h"
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#include "asm/current.h"
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#include "asm/a.out.h"
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#include "uml_uaccess.h"
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#define ABOVE_KMEM (16 * 1024 * 1024)
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extern unsigned long end_vm;
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extern unsigned long uml_physmem;
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#define under_task_size(addr, size) \
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(((unsigned long) (addr) < TASK_SIZE) && \
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(((unsigned long) (addr) + (size)) < TASK_SIZE))
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#define is_stack(addr, size) \
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(((unsigned long) (addr) < STACK_TOP) && \
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((unsigned long) (addr) >= STACK_TOP - ABOVE_KMEM) && \
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(((unsigned long) (addr) + (size)) <= STACK_TOP))
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#define access_ok_tt(type, addr, size) \
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((type == VERIFY_READ) || (segment_eq(get_fs(), KERNEL_DS)) || \
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(((unsigned long) (addr) <= ((unsigned long) (addr) + (size))) && \
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(under_task_size(addr, size) || is_stack(addr, size))))
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static inline int verify_area_tt(int type, const void __user * addr,
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unsigned long size)
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{
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return(access_ok_tt(type, addr, size) ? 0 : -EFAULT);
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}
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extern unsigned long get_fault_addr(void);
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extern int __do_copy_from_user(void *to, const void *from, int n,
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void **fault_addr, void **fault_catcher);
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extern int __do_strncpy_from_user(char *dst, const char *src, size_t n,
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void **fault_addr, void **fault_catcher);
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extern int __do_clear_user(void *mem, size_t len, void **fault_addr,
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void **fault_catcher);
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extern int __do_strnlen_user(const char *str, unsigned long n,
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void **fault_addr, void **fault_catcher);
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extern int copy_from_user_tt(void *to, const void __user *from, int n);
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extern int copy_to_user_tt(void __user *to, const void *from, int n);
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extern int strncpy_from_user_tt(char *dst, const char __user *src, int count);
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extern int __clear_user_tt(void __user *mem, int len);
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extern int clear_user_tt(void __user *mem, int len);
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extern int strnlen_user_tt(const void __user *str, int len);
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#endif
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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* adjust the settings for this buffer only. This must remain at the end
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* of the file.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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