7 Commits

Author	SHA1	Message	Date
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	33374ab257	Clean up process loader ... - cpu_state was being passed 'by value' to modify outer stack frame - don't pass loader args as rax, rbx, etc - pass in ABI order	2019-03-15 01:05:45 -07:00
Justin C. Miller	6410c898c5	Switch push/pop_all macros from push/pop to mov	2019-03-14 23:25:26 -07:00
Justin C. Miller	f7558e3d18	Implement fast syscall/sysret for sytem calls	2019-03-13 23:51:29 -07:00
Justin C. Miller	fafe582802	Initial priority-based scheduler ... - Scheduler now has multiple linked_lists of processes at different priorities - Process structure improvements - scheduler::tick() and scheduler::schedule() separation	2018-09-11 22:37:00 -07:00
Justin C. Miller	f146a96298	Cleaning up interrupts.s and adding missing IRQs	2018-09-06 09:48:18 -07:00