OpenXiangShan
/
nexus-am
mirror of https://github.com/OpenXiangShan/nexus-am.git
3
0
Fork 0
Code Issues Projects Releases Wiki Activity

apps,nanos-lite,proc,schedule: save trapframe in PCB

This commit is contained in:
Zihao Yu 2017-08-04 22:01:04 +08:00
parent 5957da34ba
commit 0e62ea0aa9
2 changed files with 8 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
apps/nanos-lite/src/irq.c
View File

@ -1,12 +1,12 @@
#include "common.h"
_RegSet* schedule(void);
_RegSet* schedule(_RegSet *);
_RegSet* do_syscall(uintptr_t *);
static _RegSet* do_event(_Event e, _RegSet* r) {
_RegSet *ret = NULL;
switch (e.event) {
case _EVENT_TRAP: ret = schedule(); break;
case _EVENT_TRAP: ret = schedule(r); break;
case _EVENT_SYSCALL: ret = do_syscall((uintptr_t *)e.cause); break;
default: panic("Unhandled event ID = %d", e.event);
}

9
apps/nanos-lite/src/proc.c
View File

@ -3,7 +3,7 @@
#define NR_PROC 4
PCB pcb[NR_PROC];
PCB *current;
PCB *current = NULL;
uintptr_t loader(_Protect *as);
@ -19,9 +19,12 @@ void load_first_prog() {
pcb[0].tf = _make(stack, (void *)entry, NULL);
}
_RegSet* schedule() {
_RegSet* schedule(_RegSet *prev) {
Log("schedule");
// when current == NULL at the very beginning, it will not cover
// any valid data, so it will be safe to write to memory near NULL
current->tf = prev;
current = &pcb[0];
_switch(&current->as);
return pcb[0].tf;
return current->tf;
}