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  • Blog Post: x86 Linear Address Space Paging Revisited

    Last time we revisited x86 segment addressing , which translates logical-address into linear-address. As we mentioned earlier, two stages of address translation would be used to arrive at a physical address: logical-address translation and linear address space paging. Paging in x86 is optional and...
  • Blog Post: x86 Segment Addressing Revisited

    Memory segmentation was first introduced to x86 family with 8086, to make it possible to access 1MB physical memory under 16bit addressing mode. Real Mode Logical address points directly into physical memory location. Logical address consists of two parts: segment and offset. Physical address...
  • Blog Post: Data Breakpoints

    The Visual Studio debugger supports a kind of breakpoint called Data Breakpoint , sometimes it is also called watchpoint. Data breakpoint is architecture dependant, as it requires hardware support provided by CPU. For x86, this will be the DR ( Debug Register ). The following code demonstrates how...
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