/*
* XXX This is a terrible name.
*/
void
upcallret(struct lwp *l)
{
struct frame *f = (struct frame *)l->l_md.md_regs;
machine_userret(l, f, 0);
}
/*
* Process the tail end of a posix_spawn() for the child.
*/
void
cpu_spawn_return(struct lwp *l)
{
struct frame *f = (struct frame *)l->l_md.md_regs;
machine_userret(l, f, 0);
}
/*
* Process a system call.
*/
void
syscall(register_t code, struct frame frame)
{
struct lwp *l;
struct proc *p;
u_quad_t sticks;
uvmexp.syscalls++;
if (!USERMODE(frame.f_sr))
panic("syscall");
l = curlwp;
p = l->l_proc;
sticks = p->p_sticks;
l->l_md.md_regs = frame.f_regs;
LWP_CACHE_CREDS(l, p);
#ifdef KERN_SA
if (__predict_false((l->l_savp)
&& (l->l_savp->savp_pflags & SAVP_FLAG_DELIVERING)))
l->l_savp->savp_pflags &= ~SAVP_FLAG_DELIVERING;
#endif
(p->p_md.md_syscall)(code, l, &frame);
machine_userret(l, &frame, sticks);
}
void
child_return(void *arg)
{
struct lwp *l = arg;
/* See cpu_lwp_fork() */
struct frame *f = (struct frame *)l->l_md.md_regs;
f->f_regs[D0] = 0;
f->f_sr &= ~PSL_C;
f->f_format = FMT0;
machine_userret(l, f, 0);
ktrsysret(SYS_fork, 0, 0);
}
/*
* Start a new LWP
*/
void
startlwp(void *arg)
{
ucontext_t *uc = arg;
lwp_t *l = curlwp;
struct frame *f = (struct frame *)l->l_md.md_regs;
int error __diagused;
f->f_regs[D0] = 0;
f->f_sr &= ~PSL_C;
f->f_format = FMT0;
error = cpu_setmcontext(l, &uc->uc_mcontext, uc->uc_flags);
KASSERT(error == 0);
kmem_free(uc, sizeof(ucontext_t));
machine_userret(l, f, 0);
}
/*
* Process a system call.
*/
void
syscall(register_t code, struct frame frame)
{
struct lwp *l;
struct proc *p;
u_quad_t sticks;
curcpu()->ci_data.cpu_nsyscall++;
if (!USERMODE(frame.f_sr))
panic("syscall");
l = curlwp;
p = l->l_proc;
sticks = p->p_sticks;
l->l_md.md_regs = frame.f_regs;
LWP_CACHE_CREDS(l, p);
(p->p_md.md_syscall)(code, l, &frame);
machine_userret(l, &frame, sticks);
}
/*
* Start a new LWP
*/
void
startlwp(void *arg)
{
int err;
ucontext_t *uc = arg;
struct lwp *l = curlwp;
struct frame *f = (struct frame *)l->l_md.md_regs;
f->f_regs[D0] = 0;
f->f_sr &= ~PSL_C;
f->f_format = FMT0;
err = cpu_setmcontext(l, &uc->uc_mcontext, uc->uc_flags);
#if DIAGNOSTIC
if (err) {
printf("Error %d from cpu_setmcontext.", err);
}
#endif
pool_put(&lwp_uc_pool, uc);
machine_userret(l, f, 0);
}
