1 //===-- MachVMRegion.h ------------------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 //  Created by Greg Clayton on 6/26/07.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef __MachVMRegion_h__
15 #define __MachVMRegion_h__
16 
17 #include "DNBDefs.h"
18 #include "DNBError.h"
19 #include <mach/mach.h>
20 
21 class MachVMRegion
22 {
23 public:
24     MachVMRegion(task_t task);
25     ~MachVMRegion();
26 
27     void Clear();
28     mach_vm_address_t StartAddress() const { return m_start; }
29     mach_vm_address_t EndAddress() const { return m_start + m_size; }
30     mach_vm_size_t GetByteSize () const { return m_size; }
31     mach_vm_address_t BytesRemaining(mach_vm_address_t addr) const
32     {
33         if (ContainsAddress(addr))
34             return m_size - (addr - m_start);
35         else
36             return 0;
37     }
38     bool ContainsAddress(mach_vm_address_t addr) const
39     {
40         return addr >= StartAddress() && addr < EndAddress();
41     }
42 
43     bool SetProtections(mach_vm_address_t addr, mach_vm_size_t size, vm_prot_t prot);
44     bool RestoreProtections();
45     bool GetRegionForAddress(nub_addr_t addr);
46 
47     uint32_t
48     GetDNBPermissions () const;
49 
50 protected:
51 #if defined (VM_REGION_SUBMAP_SHORT_INFO_COUNT_64)
52     typedef vm_region_submap_short_info_data_64_t RegionInfo;
53     enum { kRegionInfoSize = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64 };
54 #else
55     typedef vm_region_submap_info_data_64_t RegionInfo;
56     enum { kRegionInfoSize = VM_REGION_SUBMAP_INFO_COUNT_64 };
57 #endif
58 
59     task_t              m_task;
60     mach_vm_address_t   m_addr;
61     DNBError            m_err;
62     mach_vm_address_t   m_start;
63     mach_vm_size_t      m_size;
64     natural_t           m_depth;
65     RegionInfo          m_data;
66     vm_prot_t           m_curr_protection;    // The current, possibly modified protections. Original value is saved in m_data.protections.
67     mach_vm_address_t   m_protection_addr;    // The start address at which protections were changed
68     mach_vm_size_t      m_protection_size;    // The size of memory that had its protections changed
69 
70 };
71 
72 #endif    // #ifndef __MachVMRegion_h__
73