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3.4. INTERFACE & CLASSES CHAPTER 3. VM, PROTECTION AND PAGING 101 102 //now mark as free , everything that might be useable 103 for ( i =0; i 1024∗256) //because max 1 gig of memory, see above 111 { 112 continue ; 113 } 114 115 for ( k=Max( start_page , lowest_unreserved_page_ ) ; k2gb und
CHAPTER 3. VM, PROTECTION AND PAGING 3.5. SWEB BOOT PROCESS 163 164 // w i l l propably be 1024 165 debug (PM, " Ctor : lowest_unreserved_page_=%d\n" , lowest_unreserved_page_ ) ; 166 prenew_assert ( lowest_unreserved_page_ >= 1024); 167 prenew_assert ( lowest_unreserved_page_ < number_of_pages_ ) ; 168 debug (PM, " Ctor done\n" ) ; 169 } 170 171 uint32 PageManager : : getTotalNumPages ( ) const 172 { 173 return number_of_pages_ ; 174 } 175 176 //used by loader . cpp ArchMemory . cpp 177 uint32 PageManager : : getFreePhysicalPage ( uint32 type ) 178 { 179 i f ( type == PAGE_FREE || type == PAGE_RESERVED) //what a stupid thing that would be to do 180 return 0; 181 182 i f ( lock_ ) 183 lock_−>acquire ( ) ; 184 185 // f i r s t 1024 pages are the 4MiB f o r Kernel Space 186 for ( uint32 p=lowest_unreserved_page_ ; prelease ( ) ; 193 return p ; 194 } 195 } 196 i f ( lock_ ) 197 lock_−>release ( ) ; 198 arch_panic ( ( uint8 ∗) "PageManager : Sorry , no more Pages Free ! ! ! " ) ; 199 return 0; 200 } 201 202 void PageManager : : freePage ( uint32 page_number ) 203 { 204 i f ( lock_ ) 205 lock_−>acquire ( ) ; 206 i f ( page_number >= lowest_unreserved_page_ && page_number < number_of_pages_ 207 && page_usage_table_ [ page_number ] != PAGE_RESERVED) 208 page_usage_table_ [ page_number ] = PAGE_FREE; 209 i f ( lock_ ) 210 lock_−>release ( ) ; 211 } 3.5 Sweb Boot Process 3.5.1 Boot Sequence Sweb uses a patched version of Grub to load itself into memory (patched only for vesa-mode, textual mode works without patching). Afterwards the following steps are executed in sequential order: 1. load gdt 2. load LINEAR_DATA_SEL into all segment registers 43 of 151
Page 1 and 2: The holy bible of SWEB SWEB-Crew Se
Page 3 and 4: Contents 1 Install 13 1.1 some note
Page 5 and 6: CONTENTS CONTENTS 6 System Calls 71
Page 7 and 8: CONTENTS CONTENTS 11.6.9Running Xen
Page 9 and 10: List of Figures 3.1 Protected Mode
Page 11 and 12: List of Tables 3.1 Segment Descript
Page 13 and 14: Chapter 1 Install Basic guidelines
Page 15 and 16: CHAPTER 1. INSTALL 1.2. RUNNING SWE
Page 17 and 18: CHAPTER 1. INSTALL 1.3. DEVELOPERS
Page 19 and 20: Chapter 2 GDB 2.1 General The GNU P
Page 21 and 22: CHAPTER 2. GDB 2.5. USING DDD The d
Page 23 and 24: CHAPTER 2. GDB 2.5. USING DDD To ge
Page 25 and 26: Chapter 3 VM, Protection and Paging
Page 27 and 28: CHAPTER 3. VM, PROTECTION AND PAGIN
Page 41: CHAPTER 3. VM, PROTECTION AND PAGIN
Page 55 and 56: Chapter 4 Kernelspace Memory Manage
Page 57 and 58: CHAPTER 4. KERNELSPACE MEMORY MANAG
Page 59 and 60: CHAPTER 4. KERNELSPACE MEMORY MANAG
Page 61 and 62: Chapter 5 Threads and Processes 5.1
Page 63 and 64: CHAPTER 5. THREADS AND PROCESSES 5.
Page 65 and 66: CHAPTER 5. THREADS AND PROCESSES5.4
Page 71 and 72: Chapter 6 System Calls 6.1 Base Inf
Page 73 and 74: CHAPTER 6. SYSTEM 6.2. CALLS SYSTEM
Page 75 and 76: CHAPTER 6. SYSTEM CALLS 6.3. SYSTEM
Page 81 and 82: Chapter 7 Character Devices 7.1 Int
Page 83 and 84: CHAPTER 7. CHARACTER DEVICES 7.3. C
Page 85 and 86: CHAPTER 7. CHARACTER DEVICES 7.4. K
Page 87 and 88: CHAPTER 7.5. SERIAL 7. CHARACTER PO
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CHAPTER 7. CHARACTER DEVICES 7.7. T
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CHAPTER 7. CHARACTER DEVICES 7.7. T
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CHAPTER 7. CHARACTER DEVICES 7.8. C
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Chapter 8 Block Devices 8.1 Introdu
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CHAPTER 8. BLOCK DEVICES 8.2. IMPLE
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Page 107 and 108:
Chapter 9 VFS, FS 9.1 Introduction
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CHAPTER 9. VFS, FS 9.3. VFS DATA ST
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CHAPTER 9. VFS, FS 9.4. RAMFS - MEM
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Chapter 10 Locking 10.1 Introductio
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CHAPTER 10. LOCKING 10.2. LOCKS 10.
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CHAPTER 10. LOCKING 10.4. CRITICAL
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Chapter 11 Xen 11.1 Introduction Th
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CHAPTER 11. XEN 11.3. XEN Xen diffe
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CHAPTER 11. XEN 11.4. SWEB- XEN 11.
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CHAPTER 11. XEN 11.4. SWEB- XEN 21
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CHAPTER 11. XEN 11.4. SWEB- XEN Fig
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CHAPTER 11. XEN 11.4. SWEB- XEN 11.
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CHAPTER 11. XEN 11.4. SWEB- XEN Fig
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CHAPTER 11. XEN 11.6. APPENDIX: INS
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Chapter 12 Hacking Sweb This chapte
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Bibliography [1] Wikipedia:Binary_p
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