/*
* Save the current user registers on the user stack.
- * We only save the altivec registers if the process has used
- * altivec instructions at some point.
+ * We only save the altivec/spe registers if the process has used
+ * altivec/spe instructions at some point.
*/
static int
-save_user_regs(struct pt_regs *regs, struct mcontext *frame, int sigret)
+save_user_regs(struct pt_regs *regs, struct mcontext __user *frame, int sigret)
{
/* save general and floating-point registers */
CHECK_FULL_REGS(regs);
#ifdef CONFIG_ALTIVEC
if (current->thread.used_vr && (regs->msr & MSR_VEC))
giveup_altivec(current);
+#endif /* CONFIG_ALTIVEC */
+#ifdef CONFIG_SPE
+ if (current->thread.used_spe && (regs->msr & MSR_SPE))
+ giveup_spe(current);
#endif /* CONFIG_ALTIVEC */
preempt_enable();
* significant bits of a vector, we "cheat" and stuff VRSAVE in the
* most significant bits of that same vector. --BenH
*/
- if (__put_user(current->thread.vrsave, (u32 *)&frame->mc_vregs[32]))
+ if (__put_user(current->thread.vrsave, (u32 __user *)&frame->mc_vregs[32]))
return 1;
#endif /* CONFIG_ALTIVEC */
+#ifdef CONFIG_SPE
+ /* save spe registers */
+ if (current->thread.used_spe) {
+ if (__copy_to_user(&frame->mc_vregs, current->thread.evr,
+ ELF_NEVRREG * sizeof(u32)))
+ return 1;
+ /* set MSR_SPE in the saved MSR value to indicate that
+ frame->mc_vregs contains valid data */
+ if (__put_user(regs->msr | MSR_SPE, &frame->mc_gregs[PT_MSR]))
+ return 1;
+ }
+ /* else assert((regs->msr & MSR_SPE) == 0) */
+
+ /* We always copy to/from spefscr */
+ if (__put_user(current->thread.spefscr, (u32 *)&frame->mc_vregs + ELF_NEVRREG))
+ return 1;
+#endif /* CONFIG_SPE */
+
if (sigret) {
/* Set up the sigreturn trampoline: li r0,sigret; sc */
if (__put_user(0x38000000UL + sigret, &frame->tramp[0])
static int
restore_user_regs(struct pt_regs *regs, struct mcontext __user *sr, int sig)
{
- unsigned long save_r2;
-#ifdef CONFIG_ALTIVEC
+ unsigned long save_r2 = 0;
+#if defined(CONFIG_ALTIVEC) || defined(CONFIG_SPE)
unsigned long msr;
#endif
memset(¤t->thread.vr, 0, ELF_NVRREG * sizeof(vector128));
/* Always get VRSAVE back */
- if (__get_user(current->thread.vrsave, (u32 *)&sr->mc_vregs[32]))
+ if (__get_user(current->thread.vrsave, (u32 __user *)&sr->mc_vregs[32]))
return 1;
#endif /* CONFIG_ALTIVEC */
+#ifdef CONFIG_SPE
+ /* force the process to reload the spe registers from
+ current->thread when it next does spe instructions */
+ regs->msr &= ~MSR_SPE;
+ if (!__get_user(msr, &sr->mc_gregs[PT_MSR]) && (msr & MSR_SPE) != 0) {
+ /* restore spe registers from the stack */
+ if (__copy_from_user(current->thread.evr, &sr->mc_vregs,
+ sizeof(sr->mc_vregs)))
+ return 1;
+ } else if (current->thread.used_spe)
+ memset(¤t->thread.evr, 0, ELF_NEVRREG * sizeof(u32));
+
+ /* Always get SPEFSCR back */
+ if (__get_user(current->thread.spefscr, (u32 *)&sr->mc_vregs + ELF_NEVRREG))
+ return 1;
+#endif /* CONFIG_SPE */
+
return 0;
}
printk("badframe in handle_rt_signal, regs=%p frame=%p newsp=%lx\n",
regs, frame, newsp);
#endif
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
- force_sig(SIGSEGV, current);
+ force_sigsegv(sig, current);
}
static int do_setcontext(struct ucontext __user *ucp, struct pt_regs *regs, int sig)
{
sigset_t set;
- struct mcontext *mcp;
+ struct mcontext __user *mcp;
if (__copy_from_user(&set, &ucp->uc_sigmask, sizeof(set))
|| __get_user(mcp, &ucp->uc_regs))
if (new_ctx == NULL)
return 0;
if (verify_area(VERIFY_READ, new_ctx, sizeof(*new_ctx))
- || __get_user(tmp, (u8 *) new_ctx)
- || __get_user(tmp, (u8 *) (new_ctx + 1) - 1))
+ || __get_user(tmp, (u8 __user *) new_ctx)
+ || __get_user(tmp, (u8 __user *) (new_ctx + 1) - 1))
return -EFAULT;
/*
/* create a stack frame for the caller of the handler */
newsp -= __SIGNAL_FRAMESIZE;
- if (verify_area(VERIFY_WRITE, (void *) newsp, origsp - newsp))
+ if (verify_area(VERIFY_WRITE, (void __user *) newsp, origsp - newsp))
goto badframe;
#if _NSIG != 64
printk("badframe in handle_signal, regs=%p frame=%p newsp=%lx\n",
regs, frame, newsp);
#endif
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
- force_sig(SIGSEGV, current);
+ force_sigsegv(sig, current);
}
/*
set.sig[1] = sigctx._unused[3];
restore_sigmask(&set);
- sr = (struct mcontext *) sigctx.regs;
+ sr = (struct mcontext __user *) sigctx.regs;
if (verify_area(VERIFY_READ, sr, sizeof(*sr))
|| restore_user_regs(regs, sr, 1))
goto badframe;
int do_signal(sigset_t *oldset, struct pt_regs *regs)
{
siginfo_t info;
- struct k_sigaction *ka;
+ struct k_sigaction ka;
unsigned long frame, newsp;
int signr, ret;
newsp = frame = 0;
- signr = get_signal_to_deliver(&info, regs, NULL);
-
- ka = (signr == 0)? NULL: ¤t->sighand->action[signr-1];
+ signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (TRAP(regs) == 0x0C00 /* System Call! */
&& regs->ccr & 0x10000000 /* error signalled */
if (signr > 0
&& (ret == ERESTARTNOHAND || ret == ERESTART_RESTARTBLOCK
|| (ret == ERESTARTSYS
- && !(ka->sa.sa_flags & SA_RESTART)))) {
+ && !(ka.sa.sa_flags & SA_RESTART)))) {
/* make the system call return an EINTR error */
regs->result = -EINTR;
regs->gpr[3] = EINTR;
if (signr == 0)
return 0; /* no signals delivered */
- if ((ka->sa.sa_flags & SA_ONSTACK) && current->sas_ss_size
+ if ((ka.sa.sa_flags & SA_ONSTACK) && current->sas_ss_size
&& !on_sig_stack(regs->gpr[1]))
newsp = current->sas_ss_sp + current->sas_ss_size;
else
newsp &= ~0xfUL;
/* Whee! Actually deliver the signal. */
- if (ka->sa.sa_flags & SA_SIGINFO)
- handle_rt_signal(signr, ka, &info, oldset, regs, newsp);
+ if (ka.sa.sa_flags & SA_SIGINFO)
+ handle_rt_signal(signr, &ka, &info, oldset, regs, newsp);
else
- handle_signal(signr, ka, &info, oldset, regs, newsp);
-
- if (ka->sa.sa_flags & SA_ONESHOT)
- ka->sa.sa_handler = SIG_DFL;
+ handle_signal(signr, &ka, &info, oldset, regs, newsp);
- if (!(ka->sa.sa_flags & SA_NODEFER)) {
+ if (!(ka.sa.sa_flags & SA_NODEFER)) {
spin_lock_irq(¤t->sighand->siglock);
- sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
+ sigorsets(¤t->blocked,¤t->blocked,&ka.sa.sa_mask);
sigaddset(¤t->blocked, signr);
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
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