6 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	8375870af6	Improve syscall definitions ... - Allow constant id specification - Define function signature in SYSCALL macro - Move implementation into src/kernel/syscalls/*.cpp	2019-04-03 10:03:15 -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	ed3f9410a6	Make nulldrv a small C++ program	2019-03-24 13:44:25 -07:00
Justin C. Miller	3d0b262435	Add null driver ... This will be the target of our real ELF loader	2018-09-05 23:01:05 -07:00