Tag
syscall-abi
- Sep 24, 2026 32-bit Compatibility System Calls on a 64-bit Kernel How one kernel serves two pointer widths, why the compatibility entry path differs from the native one, and where the translation layer leaks. operating systems
- Jun 2, 2026 System Call ABIs and the Register Argument Convention How arguments and return values cross the privilege boundary, why there are at most six of them, and why two ABIs on one machine can disagree about the layout of a struct. operating systems
- Dec 25, 2025 Error Returns and the errno Convention Why the kernel signals failure with a negative value in the result register, how the C library turns that into errno, and which failures a caller cannot distinguish. operating systems
- Dec 5, 2025 Copying Data Across the User-Kernel Boundary Why the kernel cannot simply dereference a pointer supplied by a program, how the copy routines validate and fault, and where the bytes actually go. operating systems