5 ms·

How do they detect when the fallback should be used?

• bri3d 6y ago
  It's right in the README - "Box86's Dynarec uses a mechanism with Memory Protection and a SegFault signal handler to handle JIT code." Essentially, code areas are write protected and when they trigger a write fault, the area is marked as "dirty" to be recompiled. https://github.com/ptitSeb/box86/commit/2aa2e53fef61d00df5354fcea68a7fd52b2712bd https://github.com/ptitSeb/box86/commit/2aa2e53fef61d00df535... first "protect memory, fault handler purges that code block as 'invalid' approach" and https://github.com/ptitSeb/box86/commit/4778760622df90c97da222cfdb3fba8d2cfe23dc https://github.com/ptitSeb/box86/commit/4778760622df90c97da2... second, "mark block as dirty rather than purging it" approach
  • ant6n 6y ago
    I dabbled a bit in x86 on ARM emulation quite a while back, but didn`t make it beyond a couple of concepts. It´s crazy how much the box86 people accomplished in a relatively short amount of time.
  • rijoja 6y ago
    Well explained! Thank you so much for this!