Implementation sources

Exceptions & traps

The arm64 exception path, the Mach trap and BSD syscall dispatch tables, and the register and saved-state accessors behind them.

Exception vectors and first-level handlersosfmk/arm64/locore.s

Second-level exception handlersosfmk/arm64/sleh.c

Kernel entry and CPU bring-uposfmk/arm64/start.s

Mach trap tableosfmk/kern/syscall_sw.c

BSD system call dispatch (arm)bsd/dev/arm/systemcalls.c

Mach exception deliveryosfmk/kern/exception.c

Processor and exception-syndrome registers (arm64)osfmk/arm64/proc_reg.h

Saved-state (exception frame) accessorsosfmk/mach/arm/thread_status.h

Exception delivery structuresosfmk/kern/exception.h

Thread and thread_ro structuresosfmk/kern/thread.h

other groups: Debugging · Userspace debugging · MIG (Mach Interface Generator) · LLDB debugserver