1999/0121/mpc/trap.c (diff list | history)

mpc/trap.c on 1999/0121
1999/0121		#include "u.h" #include "../port/lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "io.h" #include "ureg.h" #include "../port/error.h" /* Give enough context in the ureg to produce a kernel stack for * a sleeping process */ void setkernur(Ureg* ureg, Proc* p) { ureg->pc = p->sched.pc; ureg->sp = p->sched.sp+4; } /* This routine must save the values of registers the user is not permitted to write * from devproc and then restore the saved values before returning */ void setregisters(Ureg* ureg, char* pureg, char* uva, int n) { USED(ureg, pureg, uva, n); panic("not done"); } void dumpregs(Ureg* ureg) { USED(ureg); panic("not done"); } void dumpstack(void) { panic("not done"); } ulong userpc(void) { Ureg *ureg; ureg = (Ureg*)up->dbgreg; return ureg->pc; } ulong dbgpc(Proc *p) { Ureg *ureg; ureg = p->dbgreg; if(ureg == 0) return 0; return ureg->pc; } static void linkproc(void) { spllo(); up->kpfun(up->kparg); } void kprocchild(Proc* p, void (*func)(void*), void* arg) { p->sched.pc = (ulong)linkproc; p->sched.sp = (ulong)p->kstack+KSTACK; p->kpfun = func; p->kparg = arg; } void forkchild(Proc *p, Ureg *ureg) { USED(p, ureg); } /* * called in sysfile.c */ void evenaddr(ulong addr) { if(addr & 3){ postnote(up, 1, "sys: odd address", NDebug); error(Ebadarg); } } long execregs(ulong entry, ulong ssize, ulong nargs) { ulong *sp; Ureg *ureg; sp = (ulong*)(USTKTOP - ssize); *--sp = nargs; ureg = up->dbgreg; ureg->usp = (ulong)sp; ureg->pc = entry; return USTKTOP-BY2WD; /* address of user-level clock */ } void trap(Ureg *ur) { USED(ur); } /* * called directly by l.s:/intrvec */ void intr(Ureg *ur) { USED(ur); } void intrenable(int v, void (*r)(Ureg*, void*), void *arg, int) { USED(v, r, arg); }