7 Commits

Author	SHA1	Message	Date
Justin C. Miller	c605793a9d	Fix fork() for new task switching model	2019-04-03 10:08:26 -07:00
Justin C. Miller	11a53e792f	Improve syscalls for new task switching ... There are a lot of under the hood changes here: - Move syscalls to be a dispatch table, defined by syscalls.inc - Don't need a full process state (push_all) in syscalls now - In push_all, define REGS instead of using offsets - Save TWO stack pointers as well as current saved stack pointer in TCB: - rsp0 is the base of the kernel stack for interrupts - rsp3 is the saved user stack from cpu_data - Update syscall numbers in nulldrv - Some asm-debugging enhancements to the gdb script - fork() still not working	2019-04-02 00:25:36 -07:00
Justin C. Miller	ca2362f858	Simplify task switches ... No longer using the rsp from the entry to the kernel, but instead switching rsp at task-switching time in assembly. This currently breaks fork()	2019-03-31 22:49:24 -07:00
Justin C. Miller	be007c6278	Implement exit syscall	2019-03-14 22:28:21 -07:00
Justin C. Miller	97ac3c09fa	Implement initial fork syscall	2019-03-09 12:18:21 -08:00
Justin C. Miller	aca442ee87	First pass at message syscalls	2019-02-07 18:19:22 -08:00
Justin C. Miller	482b9f50fc	Initial process waiting/waking ... Processes can now wait on signals/children/time. There is no clock currently so "time" is just a monotonically increating tick count. Added a SLEEP syscall to test this waiting/waking.	2018-09-16 12:22:52 -07:00