int thread_load(struct thread *thread) {
if (thread->vm86_active) {
set_int_stack(&thread->vm86_start);
}
else {
set_int_stack(&thread->vm86_es);
}
if (thread->fxdata) {
fpu_load(thread->fxdata);
}
if (thread->pctx && thread->pctx != _active_pctx) {
pctx_load(thread->pctx);
}
_active_thread = thread;
return 0;
}
void
setup_linux_rt_sigframe(struct trapframe *tf, const ksiginfo_t *ksi,
const sigset_t *mask)
{
struct lwp *l = curlwp;
struct proc *p = l->l_proc;
struct linux_rt_sigframe *sfp, sigframe;
int onstack, error;
int fsize, rndfsize;
int sig = ksi->ksi_signo;
extern char linux_rt_sigcode[], linux_rt_esigcode[];
/* Do we need to jump onto the signal stack? */
onstack = (l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 &&
(SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0;
/* Allocate space for the signal handler context. */
fsize = sizeof(struct linux_rt_sigframe);
rndfsize = ((fsize + 15) / 16) * 16;
if (onstack)
sfp = (struct linux_rt_sigframe *)
((char *)l->l_sigstk.ss_sp + l->l_sigstk.ss_size);
else
sfp = (struct linux_rt_sigframe *)(alpha_pal_rdusp());
sfp = (struct linux_rt_sigframe *)((char *)sfp - rndfsize);
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK) && (p->p_pid == sigpid))
printf("linux_sendsig(%d): sig %d ssp %p usp %p\n", p->p_pid,
sig, &onstack, sfp);
#endif /* DEBUG */
/*
* Build the signal context to be used by sigreturn.
*/
memset(&sigframe.uc, 0, sizeof(struct linux_ucontext));
sigframe.uc.uc_mcontext.sc_onstack = onstack;
/* Setup potentially partial signal mask in sc_mask. */
/* But get all of it in uc_sigmask */
native_to_linux_old_sigset(&sigframe.uc.uc_mcontext.sc_mask, mask);
native_to_linux_sigset(&sigframe.uc.uc_sigmask, mask);
sigframe.uc.uc_mcontext.sc_pc = tf->tf_regs[FRAME_PC];
sigframe.uc.uc_mcontext.sc_ps = ALPHA_PSL_USERMODE;
frametoreg(tf, (struct reg *)sigframe.uc.uc_mcontext.sc_regs);
sigframe.uc.uc_mcontext.sc_regs[R_SP] = alpha_pal_rdusp();
fpu_load();
alpha_pal_wrfen(1);
sigframe.uc.uc_mcontext.sc_fpcr = alpha_read_fpcr();
sigframe.uc.uc_mcontext.sc_fp_control = alpha_read_fp_c(l);
alpha_pal_wrfen(0);
sigframe.uc.uc_mcontext.sc_traparg_a0 = tf->tf_regs[FRAME_A0];
sigframe.uc.uc_mcontext.sc_traparg_a1 = tf->tf_regs[FRAME_A1];
sigframe.uc.uc_mcontext.sc_traparg_a2 = tf->tf_regs[FRAME_A2];
native_to_linux_siginfo(&sigframe.info, &ksi->ksi_info);
sendsig_reset(l, sig);
mutex_exit(p->p_lock);
error = copyout((void *)&sigframe, (void *)sfp, fsize);
mutex_enter(p->p_lock);
if (error != 0) {
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
printf("sendsig(%d): copyout failed on sig %d\n",
p->p_pid, sig);
#endif
/*
* Process has trashed its stack; give it an illegal
* instruction to halt it in its tracks.
*/
sigexit(l, SIGILL);
/* NOTREACHED */
}
/* Pass pointers to siginfo and ucontext in the regs */
tf->tf_regs[FRAME_A1] = (unsigned long)&sfp->info;
tf->tf_regs[FRAME_A2] = (unsigned long)&sfp->uc;
/* Address of trampoline code. End up at this PC after mi_switch */
tf->tf_regs[FRAME_PC] =
(u_int64_t)(p->p_psstrp - (linux_rt_esigcode - linux_rt_sigcode));
/* Adjust the stack */
alpha_pal_wrusp((unsigned long)sfp);
/* Remember that we're now on the signal stack. */
if (onstack)
l->l_sigstk.ss_flags |= SS_ONSTACK;
}
