asmlinkage int sys_rt_sigreturn(unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7,
struct pt_regs __regs)
{
struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
struct rt_sigframe __user *frame = (struct rt_sigframe __user *)regs->regs[15];
sigset_t set;
stack_t st;
int r0;
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
goto badframe;
if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
goto badframe;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
do_sigaltstack((const stack_t __user *)&st, NULL, (unsigned long)frame);
return r0;
badframe:
force_sig(SIGSEGV, current);
return 0;
}
asmlinkage void
do_sigreturn(struct sigcontext __user *sc, struct pt_regs *regs,
struct switch_stack *sw)
{
sigset_t set;
/* Verify that it's a good sigcontext before using it */
if (verify_area(VERIFY_READ, sc, sizeof(*sc)))
goto give_sigsegv;
if (__get_user(set.sig[0], &sc->sc_mask))
goto give_sigsegv;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
if (restore_sigcontext(sc, regs, sw))
goto give_sigsegv;
/* Send SIGTRAP if we're single-stepping: */
if (ptrace_cancel_bpt (current)) {
siginfo_t info;
info.si_signo = SIGTRAP;
info.si_errno = 0;
info.si_code = TRAP_BRKPT;
info.si_addr = (void __user *) regs->pc;
info.si_trapno = 0;
send_sig_info(SIGTRAP, &info, current);
}
return;
give_sigsegv:
force_sig(SIGSEGV, current);
}
asmlinkage long _sys_rt_sigreturn(struct pt_regs *regs)
{
struct rt_sigframe *frame = (struct rt_sigframe __user *)regs->sp;
sigset_t set;
stack_t st;
/*
*/
if (((long)frame) & 3)
goto badframe;
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
goto badframe;
/*
*/
do_sigaltstack(&st, NULL, regs->sp);
return regs->gpr[11];
badframe:
force_sig(SIGSEGV, current);
return 0;
}
asmlinkage void sys_sigreturn(nabi_no_regargs struct pt_regs regs)
{
struct sigframe __user *frame;
sigset_t blocked;
int sig;
frame = (struct sigframe __user *) regs.regs[29];
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&blocked, &frame->sf_mask, sizeof(blocked)))
goto badframe;
sigdelsetmask(&blocked, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = blocked;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
sig = restore_sigcontext(®s, &frame->sf_sc);
if (sig < 0)
goto badframe;
else if (sig)
force_sig(sig, current);
/*
* Don't let your children do this ...
*/
__asm__ __volatile__(
"move\t$29, %0\n\t"
"j\tsyscall_exit"
:/* no outputs */
:"r" (®s));
/* Unreached */
badframe:
force_sig(SIGSEGV, current);
}
asmlinkage void
do_rt_sigreturn(struct rt_sigframe __user *frame, struct pt_regs *regs,
struct switch_stack *sw)
{
sigset_t set;
/* Verify that it's a good ucontext_t before using it */
if (!access_ok(VERIFY_READ, &frame->uc, sizeof(frame->uc)))
goto give_sigsegv;
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto give_sigsegv;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
if (restore_sigcontext(&frame->uc.uc_mcontext, regs, sw))
goto give_sigsegv;
/* Send SIGTRAP if we're single-stepping: */
if (ptrace_cancel_bpt (current)) {
siginfo_t info;
info.si_signo = SIGTRAP;
info.si_errno = 0;
info.si_code = TRAP_BRKPT;
info.si_addr = (void __user *) regs->pc;
info.si_trapno = 0;
send_sig_info(SIGTRAP, &info, current);
}
return;
give_sigsegv:
force_sig(SIGSEGV, current);
}
asmlinkage int sys_rt_sigreturn(long r10, long r11, long r12, long r13,
long mof, long srp, struct pt_regs *regs)
{
struct rt_sigframe __user *frame = (struct rt_sigframe *)rdusp();
sigset_t set;
/*
* Since we stacked the signal on a dword boundary,
* then frame should be dword aligned here. If it's
* not, then the user is trying to mess with us.
*/
if (((long)frame) & 3)
goto badframe;
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
if (do_sigaltstack(&frame->uc.uc_stack, NULL, rdusp()) == -EFAULT)
goto badframe;
return regs->r10;
badframe:
force_sig(SIGSEGV, current);
return 0;
}
asmlinkage int sys_rt_sigreturn(unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7,
struct pt_regs __regs)
{
struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
struct rt_sigframe __user *frame = (struct rt_sigframe __user *)regs->regs[15];
sigset_t set;
int r0;
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
goto badframe;
if (do_sigaltstack(&frame->uc.uc_stack, NULL,
regs->regs[15]) == -EFAULT)
goto badframe;
return r0;
badframe:
force_sig(SIGSEGV, current);
return 0;
}
void sys32_sigreturn(struct pt_regs *regs)
{
struct sigframe *frame;
sigset_t blocked;
frame = (struct sigframe *) MIPS_sp(regs);
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&blocked, &frame->sf_mask, sizeof(blocked)))
goto badframe;
sigdelsetmask(&blocked, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = blocked;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
if (restore_sigcontext32(regs, &frame->sf_sc))
goto badframe;
/*
* Don't let your children do this ...
*/
BUG();
//XXX if (current_thread_info()->flags & TIF_SYSCALL_TRACE)
// do_syscall_trace();
// __asm__ __volatile__(
// "move\t$29, %0\n\t"
// "j\tsyscall_exit"
// :/* no outputs */
// :"r" (®s));
/* Unreached */
badframe:
force_sig(SIGSEGV, current);
}
asmlinkage int
sys_rt_sigreturn(unsigned long r0, unsigned long r1,
unsigned long r2, unsigned long r3, unsigned long r4,
unsigned long r5, unsigned long r6, struct pt_regs regs)
{
struct rt_sigframe __user *frame = (struct rt_sigframe __user *)regs.spu;
sigset_t set;
stack_t st;
int result;
if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
if (restore_sigcontext(®s, &frame->uc.uc_mcontext, &result))
goto badframe;
if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
goto badframe;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
do_sigaltstack(&st, NULL, regs.spu);
return result;
badframe:
force_sig(SIGSEGV, current);
return 0;
}
asmlinkage int
sys_rt_sigreturn(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7, unsigned long r8,
struct pt_regs *regs)
{
struct ucontext *uc = (struct ucontext *)regs->gpr[1];
sigset_t set;
stack_t st;
if (verify_area(VERIFY_READ, uc, sizeof(*uc)))
goto badframe;
if (__copy_from_user(&set, &uc->uc_sigmask, sizeof(set)))
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sigmask_lock);
current->blocked = set;
recalc_sigpending(current);
spin_unlock_irq(¤t->sigmask_lock);
if (restore_sigcontext(regs, NULL, &uc->uc_mcontext))
goto badframe;
if (__copy_from_user(&st, &uc->uc_stack, sizeof(st)))
goto badframe;
/* This function sets back the stack flags into
the current task structure. */
sys_sigaltstack(&st, NULL, 0, 0, 0, 0, regs);
return regs->result;
badframe:
do_exit(SIGSEGV);
}
static int
efab_signal_do_sigaction(int sig, struct sigaction *act,
struct sigaction *oact,
struct mm_signal_data *tramp_data,
int *out_pass_to_kernel)
{
int rc = 0;
if( !valid_signal(sig) || sig < 1 || (act != NULL && sig_kernel_only(sig)) )
return -EINVAL;
if( oact != NULL ) {
rc = efab_signal_report_sigaction(sig, oact, tramp_data);
if( rc != 0 )
return rc;
}
if( act != NULL ) {
sigdelsetmask(&act->sa_mask, sigmask(SIGKILL) | sigmask(SIGSTOP));
/* If the signal is ignored now, we should ignore all already-pending
* signals. Instead of doing it, pass this to OS. */
if( act->sa_handler == SIG_IGN ||
(act->sa_handler == SIG_DFL && sig_kernel_ignore(sig)) )
*out_pass_to_kernel = 1;
else if( act->sa_flags & SA_ONSTACK && !tramp_data->sa_onstack_intercept )
*out_pass_to_kernel = 1;
else
rc = efab_signal_substitute(sig, act, tramp_data);
}
else
efab_signal_recheck(sig, tramp_data);
return rc;
}
asmlinkage void
do_rt_sigreturn(struct rt_sigframe *frame, struct pt_regs *regs,
struct switch_stack *sw)
{
sigset_t set;
stack_t st;
/* Verify that it's a good sigcontext before using it */
if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
goto give_sigsegv;
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto give_sigsegv;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sigmask_lock);
current->blocked = set;
recalc_sigpending(current);
spin_unlock_irq(¤t->sigmask_lock);
if (restore_sigcontext(&frame->uc.uc_mcontext, regs, sw))
goto give_sigsegv;
if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
goto give_sigsegv;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
do_sigaltstack(&st, NULL, rdusp());
/* Send SIGTRAP if we're single-stepping: */
if (ptrace_cancel_bpt (current))
send_sig(SIGTRAP, current, 1);
return;
give_sigsegv:
force_sig(SIGSEGV, current);
}
__attribute_used__ noinline static void
_sys_sigreturn(nabi_no_regargs struct pt_regs regs)
{
struct sigframe *frame;
sigset_t blocked;
frame = (struct sigframe *) regs.regs[29];
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&blocked, &frame->sf_mask, sizeof(blocked)))
goto badframe;
sigdelsetmask(&blocked, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = blocked;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
if (restore_sigcontext(®s, &frame->sf_sc))
goto badframe;
/*
* Don't let your children do this ...
*/
if (current_thread_info()->flags & TIF_SYSCALL_TRACE)
do_syscall_trace(®s, 1);
__asm__ __volatile__(
"move\t$29, %0\n\t"
"j\tsyscall_exit"
:/* no outputs */
:"r" (®s));
/* Unreached */
badframe:
force_sig(SIGSEGV, current);
}
static_unused int _sys_sigsuspend(struct pt_regs regs)
{
sigset_t *uset, saveset, newset;
uset = (sigset_t *) regs.regs[4];
if (copy_from_user(&newset, uset, sizeof(sigset_t)))
return -EFAULT;
sigdelsetmask(&newset, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
saveset = current->blocked;
current->blocked = newset;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
regs.regs[2] = EINTR;
regs.regs[7] = 1;
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
if (do_signal(&saveset, ®s))
return -EINTR;
}
}
asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
{
struct rt_sigframe __user *frame;
sigset_t set;
unsigned long eax;
frame = (struct rt_sigframe __user *)(regs->rsp - 8);
if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) {
goto badframe;
}
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) {
goto badframe;
}
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &eax))
goto badframe;
#ifdef DEBUG_SIG
printk("%d sigreturn rip:%lx rsp:%lx frame:%p rax:%lx\n",current->pid,regs.rip,regs.rsp,frame,eax);
#endif
if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->rsp) == -EFAULT)
goto badframe;
return eax;
badframe:
signal_fault(regs,frame,"sigreturn");
return 0;
}
asmlinkage int sys_sigreturn(unsigned long __unused)
{
struct pt_regs *regs = (struct pt_regs *) &__unused;
struct sigframe __user *frame = (struct sigframe __user *)(regs->esp - 8);
sigset_t set;
int eax;
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__get_user(set.sig[0], &frame->sc.oldmask)
|| (_NSIG_WORDS > 1
&& __copy_from_user(&set.sig[1], &frame->extramask,
sizeof(frame->extramask))))
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
if (restore_sigcontext(regs, &frame->sc, &eax))
goto badframe;
return eax;
badframe:
if (show_unhandled_signals && printk_ratelimit())
printk("%s%s[%d] bad frame in sigreturn frame:%p eip:%lx"
" esp:%lx oeax:%lx\n",
current->pid > 1 ? KERN_INFO : KERN_EMERG,
current->comm, current->pid, frame, regs->eip,
regs->esp, regs->orig_eax);
force_sig(SIGSEGV, current);
return 0;
}
/*
* Fairly generic implementation for sending a packet
* should work for tcp, udp and raw connections.
*/
static unsigned int privSocketSend(void *pPtr,
struct iovec *pVec,
unsigned int uVecLength,
unsigned int uDataLength,
void *pName,
unsigned int uNameLength)
{
raw_socket *pRaw = (raw_socket *)pPtr;
unsigned long ulFlags;
sigset_t sigSet;
siginfo_t sigInfo;
struct msghdr mHdr;
unsigned int uSendLength = uDataLength;
unsigned int uVecCurrent = 0;
int iRetries;
int iError;
unsigned int rvalue = 0;
if (NULL != pRaw) {
/* allow sigkill */
spin_lock_irqsave(¤t->sighand->siglock, ulFlags);
sigSet = current->blocked;
sigfillset(¤t->blocked);
sigdelsetmask(¤t->blocked, sigmask(SIGKILL));
recalc_sigpending();
spin_unlock_irqrestore(¤t->sighand->siglock, ulFlags);
mHdr.msg_control = NULL;
mHdr.msg_controllen = 0;
mHdr.msg_flags = MSG_NOSIGNAL | MSG_DONTWAIT;
/* sockaddr stuff */
mHdr.msg_name = pName;
mHdr.msg_namelen = uNameLength;
while ((true == pRaw->bConnected) && (uSendLength > 0)) {
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0))
mHdr.msg_iov = &pVec [uVecCurrent];
mHdr.msg_iovlen = uVecLength - uVecCurrent;
#endif
iRetries = 0;
iError = 0;
while ((iRetries++ < MAX_RETRIES) && (true == pRaw->bConnected)) {
/* Finally the kernel does it magic, */
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0))
iError = sock_sendmsg(pRaw->pSocket,
&mHdr,
uSendLength);
#else
iError = kernel_sendmsg(pRaw->pSocket,
&mHdr,
(struct kvec *)&pVec [uVecCurrent],
uVecLength - uVecCurrent,
uSendLength);
#endif
if (signal_pending(current)) {
/* dequeue a sigkill and quiet. */
spin_lock_irqsave(¤t->sighand->siglock, ulFlags);
dequeue_signal(current, ¤t->blocked, &sigInfo);
spin_unlock_irqrestore(¤t->sighand->siglock, ulFlags);
break;
}
switch(iError)
{
case -EAGAIN:
case -ENOSPC:
/* For these errors, les sleep then try again. */
msleep_interruptible(32 << (iRetries % 4));
break;
case 0:
/* Generic TCP has issues, copied from cifs */
KLEM_MSG("Recv TCP size issue\n");
msleep_interruptible(500);
break;
default:
/* must have gotten something more interesting, don't try again */
iRetries = MAX_RETRIES;
break;
}
}
/* Did we send any data? consider simplification*/
if (iError > 0) {
if (iError >= uSendLength) {
/* All sent, full write */
uSendLength -= iError;
rvalue += iError;
} else {
/* fix that partial write */
while ((uVecCurrent < uVecLength) && (iError > 0)) {
if (iError >= pVec [uVecCurrent].iov_len) {
/* We have consumed an entire iov */
uSendLength -= pVec [uVecCurrent].iov_len;
iError -= pVec [uVecCurrent].iov_len;
rvalue += pVec [uVecCurrent].iov_len;
uVecCurrent += 1;
} else {
/* Partial iov consumed case */
pVec [uVecCurrent].iov_len -= iError;
pVec [uVecCurrent].iov_base += iError;
uSendLength -= iError;
rvalue += iError;
iError = 0;
}
}
}
} else {
/* No data was sent, this is an error. */
KLEM_LOG("send error %d\n", iError);
rvalue = 0;
uSendLength = 0;
}
}
/* no more sigkill. */
spin_lock_irqsave(¤t->sighand->siglock, ulFlags);
current->blocked = sigSet;
recalc_sigpending();
spin_unlock_irqrestore(¤t->sighand->siglock, ulFlags);
}
return rvalue;
}
void restore_sigmask(sigset_t *set)
{
sigdelsetmask(set, ~_BLOCKABLE);
set_current_blocked(set);
}
int ckpt_restore_signals(ckpt_desc_t desc)
{
int i;
int ret;
stack_t sigstack;
sigset_t sigblocked;
log_restore_signals("restoring sigstack ...");
if (ckpt_read(desc, &sigstack, sizeof(stack_t)) != sizeof(stack_t)) {
log_err("failed to get sigstack");
return -EIO;
}
ret = compat_sigaltstack(current, &sigstack, NULL, 0);
if (ret) {
log_err("failed to restore sigstack (ret=%d)", ret);
return ret;
}
log_restore_signals("restoring sigblocked ...");
if (ckpt_read(desc, &sigblocked, sizeof(sigset_t)) != sizeof(sigset_t)) {
log_err("failed to restore sigstack");
return -EIO;
}
sigdelsetmask(&sigblocked, sigmask(SIGKILL) | sigmask(SIGSTOP));
spin_lock_irq(¤t->sighand->siglock);
current->blocked = sigblocked;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
log_restore_signals("restoring pending ...");
ret = ckpt_restore_sigpending(¤t->pending, 0, desc);
if (ret) {
log_err("failed to restore pending");
return ret;
}
ret = ckpt_restore_sigpending(¤t->signal->shared_pending, 1, desc);
if (ret) {
log_err("failed to restore shared_pending");
return ret;
}
log_restore_signals("restoring sigaction ...");
for (i = 0; i < _NSIG; i++) {
struct k_sigaction sigaction;
if (ckpt_read(desc, &sigaction, sizeof(struct k_sigaction)) != sizeof(struct k_sigaction)) {
log_err("failed to get sigaction");
return -EIO;
}
if ((i != SIGKILL - 1) && (i != SIGSTOP - 1)) {
ret = do_sigaction(i + 1, &sigaction, 0);
if (ret) {
log_err("failed to restore sigaction (ret=%d)", ret);
return ret;
}
}
}
log_restore_pos(desc);
return 0;
}
asmlinkage void do_sigreturn(struct pt_regs *regs)
{
struct signal_frame __user *sf;
unsigned long up_psr, pc, npc;
sigset_t set;
__siginfo_fpu_t __user *fpu_save;
__siginfo_rwin_t __user *rwin_save;
int err;
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
synchronize_user_stack();
sf = (struct signal_frame __user *) regs->u_regs[UREG_FP];
/* 1. Make sure we are not getting garbage from the user */
if (!access_ok(VERIFY_READ, sf, sizeof(*sf)))
goto segv_and_exit;
if (((unsigned long) sf) & 3)
goto segv_and_exit;
err = __get_user(pc, &sf->info.si_regs.pc);
err |= __get_user(npc, &sf->info.si_regs.npc);
if ((pc | npc) & 3)
goto segv_and_exit;
/* 2. Restore the state */
up_psr = regs->psr;
err |= __copy_from_user(regs, &sf->info.si_regs, sizeof(struct pt_regs));
/* User can only change condition codes and FPU enabling in %psr. */
regs->psr = (up_psr & ~(PSR_ICC | PSR_EF))
| (regs->psr & (PSR_ICC | PSR_EF));
/* Prevent syscall restart. */
pt_regs_clear_syscall(regs);
err |= __get_user(fpu_save, &sf->fpu_save);
if (fpu_save)
err |= restore_fpu_state(regs, fpu_save);
err |= __get_user(rwin_save, &sf->rwin_save);
if (rwin_save)
err |= restore_rwin_state(rwin_save);
/* This is pretty much atomic, no amount locking would prevent
* the races which exist anyways.
*/
err |= __get_user(set.sig[0], &sf->info.si_mask);
err |= __copy_from_user(&set.sig[1], &sf->extramask,
(_NSIG_WORDS-1) * sizeof(unsigned int));
if (err)
goto segv_and_exit;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
return;
segv_and_exit:
force_sig(SIGSEGV, current);
}
asmlinkage void do_rt_sigreturn(struct pt_regs *regs)
{
struct rt_signal_frame __user *sf;
unsigned int psr, pc, npc;
__siginfo_fpu_t __user *fpu_save;
__siginfo_rwin_t __user *rwin_save;
mm_segment_t old_fs;
sigset_t set;
stack_t st;
int err;
synchronize_user_stack();
sf = (struct rt_signal_frame __user *) regs->u_regs[UREG_FP];
if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) ||
(((unsigned long) sf) & 0x03))
goto segv;
err = __get_user(pc, &sf->regs.pc);
err |= __get_user(npc, &sf->regs.npc);
err |= ((pc | npc) & 0x03);
err |= __get_user(regs->y, &sf->regs.y);
err |= __get_user(psr, &sf->regs.psr);
err |= __copy_from_user(®s->u_regs[UREG_G1],
&sf->regs.u_regs[UREG_G1], 15 * sizeof(u32));
regs->psr = (regs->psr & ~PSR_ICC) | (psr & PSR_ICC);
/* Prevent syscall restart. */
pt_regs_clear_syscall(regs);
err |= __get_user(fpu_save, &sf->fpu_save);
if (!err && fpu_save)
err |= restore_fpu_state(regs, fpu_save);
err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
err |= __copy_from_user(&st, &sf->stack, sizeof(stack_t));
if (err)
goto segv;
regs->pc = pc;
regs->npc = npc;
/* It is more difficult to avoid calling this function than to
* call it and ignore errors.
*/
old_fs = get_fs();
set_fs(KERNEL_DS);
do_sigaltstack((const stack_t __user *) &st, NULL, (unsigned long)sf);
set_fs(old_fs);
err |= __get_user(rwin_save, &sf->rwin_save);
if (!err && rwin_save) {
if (restore_rwin_state(rwin_save))
goto segv;
}
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
return;
segv:
force_sig(SIGSEGV, current);
}
int sys32_rt_sigtimedwait(compat_sigset_t *uthese,
siginfo_t32 *uinfo, struct compat_timespec *uts,
compat_time_t sigsetsize)
{
int ret, sig;
sigset_t these;
compat_sigset_t these32;
struct timespec ts;
siginfo_t info;
long timeout = 0;
/*
* As the result of a brainfarting competition a few years ago the
* size of sigset_t for the 32-bit kernel was choosen to be 128 bits
* but nothing so far is actually using that many, 64 are enough. So
* for now we just drop the high bits.
*/
if (copy_from_user (&these32, uthese, sizeof(compat_old_sigset_t)))
return -EFAULT;
switch (_NSIG_WORDS) {
#ifdef __MIPSEB__
case 4: these.sig[3] = these32.sig[6] | (((long)these32.sig[7]) << 32);
case 3: these.sig[2] = these32.sig[4] | (((long)these32.sig[5]) << 32);
case 2: these.sig[1] = these32.sig[2] | (((long)these32.sig[3]) << 32);
case 1: these.sig[0] = these32.sig[0] | (((long)these32.sig[1]) << 32);
#endif
#ifdef __MIPSEL__
case 4: these.sig[3] = these32.sig[7] | (((long)these32.sig[6]) << 32);
case 3: these.sig[2] = these32.sig[5] | (((long)these32.sig[4]) << 32);
case 2: these.sig[1] = these32.sig[3] | (((long)these32.sig[2]) << 32);
case 1: these.sig[0] = these32.sig[1] | (((long)these32.sig[0]) << 32);
#endif
}
/*
* Invert the set of allowed signals to get those we
* want to block.
*/
sigdelsetmask(&these, sigmask(SIGKILL)|sigmask(SIGSTOP));
signotset(&these);
if (uts) {
if (get_user (ts.tv_sec, &uts->tv_sec) ||
get_user (ts.tv_nsec, &uts->tv_nsec))
return -EINVAL;
if (ts.tv_nsec >= 1000000000L || ts.tv_nsec < 0
|| ts.tv_sec < 0)
return -EINVAL;
}
spin_lock_irq(¤t->sighand->siglock);
sig = dequeue_signal(current, &these, &info);
if (!sig) {
/* None ready -- temporarily unblock those we're interested
in so that we'll be awakened when they arrive. */
sigset_t oldblocked = current->blocked;
sigandsets(¤t->blocked, ¤t->blocked, &these);
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
timeout = MAX_SCHEDULE_TIMEOUT;
if (uts)
timeout = (timespec_to_jiffies(&ts)
+ (ts.tv_sec || ts.tv_nsec));
current->state = TASK_INTERRUPTIBLE;
timeout = schedule_timeout(timeout);
spin_lock_irq(¤t->sighand->siglock);
sig = dequeue_signal(current, &these, &info);
current->blocked = oldblocked;
recalc_sigpending();
}
spin_unlock_irq(¤t->sighand->siglock);
if (sig) {
ret = sig;
if (uinfo) {
if (copy_siginfo_to_user32(uinfo, &info))
ret = -EFAULT;
}
} else {
ret = -EAGAIN;
if (timeout)
ret = -EINTR;
}
return ret;
}
/*
* Do a signal return; undo the signal stack.
*/
long sys_sigreturn(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7, unsigned long r8,
struct pt_regs *regs)
{
struct sigcontext_struct *sc, sigctx;
struct sigregs *sr;
long ret;
elf_gregset_t saved_regs; /* an array of ELF_NGREG unsigned longs */
sigset_t set;
unsigned long prevsp;
sc = (struct sigcontext_struct *)(regs->gpr[1] + __SIGNAL_FRAMESIZE);
if (copy_from_user(&sigctx, sc, sizeof(sigctx)))
goto badframe;
set.sig[0] = sigctx.oldmask;
#if _NSIG_WORDS > 1
set.sig[1] = sigctx._unused[3];
#endif
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sigmask_lock);
current->blocked = set;
recalc_sigpending(current);
spin_unlock_irq(¤t->sigmask_lock);
sc++; /* Look at next sigcontext */
if (sc == (struct sigcontext_struct *)(sigctx.regs)) {
/* Last stacked signal - restore registers */
sr = (struct sigregs *) sigctx.regs;
if (regs->msr & MSR_FP )
giveup_fpu(current);
if (copy_from_user(saved_regs, &sr->gp_regs,
sizeof(sr->gp_regs)))
goto badframe;
saved_regs[PT_MSR] = (regs->msr & ~MSR_USERCHANGE)
| (saved_regs[PT_MSR] & MSR_USERCHANGE);
saved_regs[PT_SOFTE] = regs->softe;
memcpy(regs, saved_regs, GP_REGS_SIZE);
if (copy_from_user(current->thread.fpr, &sr->fp_regs,
sizeof(sr->fp_regs)))
goto badframe;
ret = regs->result;
} else {
/* More signals to go */
regs->gpr[1] = (unsigned long)sc - __SIGNAL_FRAMESIZE;
if (copy_from_user(&sigctx, sc, sizeof(sigctx)))
goto badframe;
sr = (struct sigregs *) sigctx.regs;
regs->gpr[3] = ret = sigctx.signal;
regs->gpr[4] = (unsigned long) sc;
regs->link = (unsigned long) &sr->tramp;
regs->nip = sigctx.handler;
if (get_user(prevsp, &sr->gp_regs[PT_R1])
|| put_user(prevsp, (unsigned long *) regs->gpr[1]))
goto badframe;
}
return ret;
badframe:
do_exit(SIGSEGV);
}
void do_rt_sigreturn(struct pt_regs *regs)
{
struct rt_signal_frame __user *sf;
unsigned long tpc, tnpc, tstate;
__siginfo_fpu_t __user *fpu_save;
mm_segment_t old_fs;
sigset_t set;
stack_t st;
int err;
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
synchronize_user_stack ();
sf = (struct rt_signal_frame __user *)
(regs->u_regs [UREG_FP] + STACK_BIAS);
/* 1. Make sure we are not getting garbage from the user */
if (((unsigned long) sf) & 3)
goto segv;
err = get_user(tpc, &sf->regs.tpc);
err |= __get_user(tnpc, &sf->regs.tnpc);
if (test_thread_flag(TIF_32BIT)) {
tpc &= 0xffffffff;
tnpc &= 0xffffffff;
}
err |= ((tpc | tnpc) & 3);
/* 2. Restore the state */
err |= __get_user(regs->y, &sf->regs.y);
err |= __get_user(tstate, &sf->regs.tstate);
err |= copy_from_user(regs->u_regs, sf->regs.u_regs, sizeof(regs->u_regs));
/* User can only change condition codes and %asi in %tstate. */
regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
err |= __get_user(fpu_save, &sf->fpu_save);
if (fpu_save)
err |= restore_fpu_state(regs, &sf->fpu_state);
err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
err |= __copy_from_user(&st, &sf->stack, sizeof(stack_t));
if (err)
goto segv;
regs->tpc = tpc;
regs->tnpc = tnpc;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
old_fs = get_fs();
set_fs(KERNEL_DS);
do_sigaltstack((const stack_t __user *) &st, NULL, (unsigned long)sf);
set_fs(old_fs);
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
return;
segv:
force_sig(SIGSEGV, current);
}
long
ia64_rt_sigreturn (struct sigscratch *scr)
{
extern char ia64_strace_leave_kernel, ia64_leave_kernel;
struct sigcontext __user *sc;
struct siginfo si;
sigset_t set;
long retval;
sc = &((struct sigframe __user *) (scr->pt.r12 + 16))->sc;
/*
* When we return to the previously executing context, r8 and r10 have already
* been setup the way we want them. Indeed, if the signal wasn't delivered while
* in a system call, we must not touch r8 or r10 as otherwise user-level state
* could be corrupted.
*/
retval = (long) &ia64_leave_kernel;
if (test_thread_flag(TIF_SYSCALL_TRACE)
|| test_thread_flag(TIF_SYSCALL_AUDIT))
/*
* strace expects to be notified after sigreturn returns even though the
* context to which we return may not be in the middle of a syscall.
* Thus, the return-value that strace displays for sigreturn is
* meaningless.
*/
retval = (long) &ia64_strace_leave_kernel;
if (!access_ok(VERIFY_READ, sc, sizeof(*sc)))
goto give_sigsegv;
if (GET_SIGSET(&set, &sc->sc_mask))
goto give_sigsegv;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
{
current->blocked = set;
recalc_sigpending();
}
spin_unlock_irq(¤t->sighand->siglock);
if (restore_sigcontext(sc, scr))
goto give_sigsegv;
#if DEBUG_SIG
printk("SIG return (%s:%d): sp=%lx ip=%lx\n",
current->comm, current->pid, scr->pt.r12, scr->pt.cr_iip);
#endif
/*
* It is more difficult to avoid calling this function than to
* call it and ignore errors.
*/
do_sigaltstack(&sc->sc_stack, NULL, scr->pt.r12);
return retval;
give_sigsegv:
si.si_signo = SIGSEGV;
si.si_errno = 0;
si.si_code = SI_KERNEL;
si.si_pid = task_pid_vnr(current);
si.si_uid = current_uid();
si.si_addr = sc;
force_sig_info(SIGSEGV, &si, current);
return retval;
}
void do_rt_sigreturn(struct pt_regs *regs)
{
struct rt_signal_frame *sf;
unsigned long tpc, tnpc, tstate;
__siginfo_fpu_t *fpu_save;
mm_segment_t old_fs;
sigset_t set;
stack_t st;
int err;
synchronize_user_stack ();
sf = (struct rt_signal_frame *)
(regs->u_regs [UREG_FP] + STACK_BIAS);
/* 1. Make sure we are not getting garbage from the user */
if (((unsigned long) sf) & 3)
goto segv;
err = get_user(tpc, &sf->regs.tpc);
err |= __get_user(tnpc, &sf->regs.tnpc);
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
tpc &= 0xffffffff;
tnpc &= 0xffffffff;
}
err |= ((tpc | tnpc) & 3);
/* 2. Restore the state */
err |= __get_user(regs->y, &sf->regs.y);
err |= __get_user(tstate, &sf->regs.tstate);
err |= copy_from_user(regs->u_regs, sf->regs.u_regs, sizeof(regs->u_regs));
/* User can only change condition codes in %tstate. */
regs->tstate &= ~(TSTATE_ICC);
regs->tstate |= (tstate & TSTATE_ICC);
err |= __get_user(fpu_save, &sf->fpu_save);
if (fpu_save)
err |= restore_fpu_state(regs, &sf->fpu_state);
err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
err |= __copy_from_user(&st, &sf->stack, sizeof(stack_t));
if (err)
goto segv;
regs->tpc = tpc;
regs->tnpc = tnpc;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
old_fs = get_fs();
set_fs(KERNEL_DS);
do_sigaltstack(&st, NULL, (unsigned long)sf);
set_fs(old_fs);
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sigmask_lock);
current->blocked = set;
recalc_sigpending(current);
spin_unlock_irq(¤t->sigmask_lock);
return;
segv:
send_sig(SIGSEGV, current, 1);
}
int sys_rt_sigreturn(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7, unsigned long r8,
struct pt_regs *regs)
{
struct rt_sigframe *rt_sf;
struct sigcontext_struct sigctx;
struct sigregs *sr;
int ret;
elf_gregset_t saved_regs; /* an array of ELF_NGREG unsigned longs */
sigset_t set;
stack_t st;
unsigned long prevsp;
rt_sf = (struct rt_sigframe *)(regs->gpr[1] + __SIGNAL_FRAMESIZE);
if (copy_from_user(&sigctx, &rt_sf->uc.uc_mcontext, sizeof(sigctx))
|| copy_from_user(&set, &rt_sf->uc.uc_sigmask, sizeof(set))
|| copy_from_user(&st, &rt_sf->uc.uc_stack, sizeof(st)))
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sigmask_lock);
current->blocked = set;
recalc_sigpending(current);
spin_unlock_irq(¤t->sigmask_lock);
rt_sf++; /* Look at next rt_sigframe */
if (rt_sf == (struct rt_sigframe *)(sigctx.regs)) {
/* Last stacked signal - restore registers -
* sigctx is initialized to point to the
* preamble frame (where registers are stored)
* see handle_signal()
*/
sr = (struct sigregs *) sigctx.regs;
if (regs->msr & MSR_FP )
giveup_fpu(current);
if (copy_from_user(saved_regs, &sr->gp_regs,
sizeof(sr->gp_regs)))
goto badframe;
saved_regs[PT_MSR] = (regs->msr & ~MSR_USERCHANGE)
| (saved_regs[PT_MSR] & MSR_USERCHANGE);
saved_regs[PT_SOFTE] = regs->softe;
memcpy(regs, saved_regs, GP_REGS_SIZE);
if (copy_from_user(current->thread.fpr, &sr->fp_regs,
sizeof(sr->fp_regs)))
goto badframe;
/* This function sets back the stack flags into
the current task structure. */
sys_sigaltstack(&st, NULL);
ret = regs->result;
} else {
/* More signals to go */
/* Set up registers for next signal handler */
regs->gpr[1] = (unsigned long)rt_sf - __SIGNAL_FRAMESIZE;
if (copy_from_user(&sigctx, &rt_sf->uc.uc_mcontext, sizeof(sigctx)))
goto badframe;
sr = (struct sigregs *) sigctx.regs;
regs->gpr[3] = ret = sigctx.signal;
/* Get the siginfo */
get_user(regs->gpr[4], (unsigned long *)&rt_sf->pinfo);
/* Get the ucontext */
get_user(regs->gpr[5], (unsigned long *)&rt_sf->puc);
regs->gpr[6] = (unsigned long) rt_sf;
regs->link = (unsigned long) &sr->tramp;
regs->nip = sigctx.handler;
if (get_user(prevsp, &sr->gp_regs[PT_R1])
|| put_user(prevsp, (unsigned long *) regs->gpr[1]))
goto badframe;
}
return ret;
badframe:
do_exit(SIGSEGV);
}
/* {set, get}context() needed for 64-bit SparcLinux userland. */
asmlinkage void sparc64_set_context(struct pt_regs *regs)
{
struct ucontext __user *ucp = (struct ucontext __user *)
regs->u_regs[UREG_I0];
mc_gregset_t __user *grp;
unsigned long pc, npc, tstate;
unsigned long fp, i7;
unsigned char fenab;
int err;
flush_user_windows();
if (get_thread_wsaved() ||
(((unsigned long)ucp) & (sizeof(unsigned long)-1)) ||
(!__access_ok(ucp, sizeof(*ucp))))
goto do_sigsegv;
grp = &ucp->uc_mcontext.mc_gregs;
err = __get_user(pc, &((*grp)[MC_PC]));
err |= __get_user(npc, &((*grp)[MC_NPC]));
if (err || ((pc | npc) & 3))
goto do_sigsegv;
if (regs->u_regs[UREG_I1]) {
sigset_t set;
if (_NSIG_WORDS == 1) {
if (__get_user(set.sig[0], &ucp->uc_sigmask.sig[0]))
goto do_sigsegv;
} else {
if (__copy_from_user(&set, &ucp->uc_sigmask, sizeof(sigset_t)))
goto do_sigsegv;
}
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
}
if (test_thread_flag(TIF_32BIT)) {
pc &= 0xffffffff;
npc &= 0xffffffff;
}
regs->tpc = pc;
regs->tnpc = npc;
err |= __get_user(regs->y, &((*grp)[MC_Y]));
err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
err |= __get_user(regs->u_regs[UREG_G1], (&(*grp)[MC_G1]));
err |= __get_user(regs->u_regs[UREG_G2], (&(*grp)[MC_G2]));
err |= __get_user(regs->u_regs[UREG_G3], (&(*grp)[MC_G3]));
err |= __get_user(regs->u_regs[UREG_G4], (&(*grp)[MC_G4]));
err |= __get_user(regs->u_regs[UREG_G5], (&(*grp)[MC_G5]));
err |= __get_user(regs->u_regs[UREG_G6], (&(*grp)[MC_G6]));
err |= __get_user(regs->u_regs[UREG_G7], (&(*grp)[MC_G7]));
err |= __get_user(regs->u_regs[UREG_I0], (&(*grp)[MC_O0]));
err |= __get_user(regs->u_regs[UREG_I1], (&(*grp)[MC_O1]));
err |= __get_user(regs->u_regs[UREG_I2], (&(*grp)[MC_O2]));
err |= __get_user(regs->u_regs[UREG_I3], (&(*grp)[MC_O3]));
err |= __get_user(regs->u_regs[UREG_I4], (&(*grp)[MC_O4]));
err |= __get_user(regs->u_regs[UREG_I5], (&(*grp)[MC_O5]));
err |= __get_user(regs->u_regs[UREG_I6], (&(*grp)[MC_O6]));
err |= __get_user(regs->u_regs[UREG_I7], (&(*grp)[MC_O7]));
err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp));
err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7));
err |= __put_user(fp,
(&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[6])));
err |= __put_user(i7,
(&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[7])));
err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab));
if (fenab) {
unsigned long *fpregs = current_thread_info()->fpregs;
unsigned long fprs;
fprs_write(0);
err |= __get_user(fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs));
if (fprs & FPRS_DL)
err |= copy_from_user(fpregs,
&(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs),
(sizeof(unsigned int) * 32));
if (fprs & FPRS_DU)
err |= copy_from_user(fpregs+16,
((unsigned long __user *)&(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs))+16,
(sizeof(unsigned int) * 32));
err |= __get_user(current_thread_info()->xfsr[0],
&(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr));
err |= __get_user(current_thread_info()->gsr[0],
&(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr));
regs->tstate &= ~TSTATE_PEF;
}
if (err)
goto do_sigsegv;
return;
do_sigsegv:
force_sig(SIGSEGV, current);
}
void do_rt_sigreturn(struct pt_regs *regs)
{
struct rt_signal_frame __user *sf;
unsigned long tpc, tnpc, tstate;
__siginfo_fpu_t __user *fpu_save;
__siginfo_rwin_t __user *rwin_save;
sigset_t set;
int err;
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
synchronize_user_stack ();
sf = (struct rt_signal_frame __user *)
(regs->u_regs [UREG_FP] + STACK_BIAS);
/* 1. Make sure we are not getting garbage from the user */
if (((unsigned long) sf) & 3)
goto segv;
err = get_user(tpc, &sf->regs.tpc);
err |= __get_user(tnpc, &sf->regs.tnpc);
if (test_thread_flag(TIF_32BIT)) {
tpc &= 0xffffffff;
tnpc &= 0xffffffff;
}
err |= ((tpc | tnpc) & 3);
/* 2. Restore the state */
err |= __get_user(regs->y, &sf->regs.y);
err |= __get_user(tstate, &sf->regs.tstate);
err |= copy_from_user(regs->u_regs, sf->regs.u_regs, sizeof(regs->u_regs));
/* User can only change condition codes and %asi in %tstate. */
regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
err |= __get_user(fpu_save, &sf->fpu_save);
if (!err && fpu_save)
err |= restore_fpu_state(regs, fpu_save);
err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
if (err || do_sigaltstack(&sf->stack, NULL, (unsigned long)sf) == -EFAULT)
goto segv;
err |= __get_user(rwin_save, &sf->rwin_save);
if (!err && rwin_save) {
if (restore_rwin_state(rwin_save))
goto segv;
}
regs->tpc = tpc;
regs->tnpc = tnpc;
/* Prevent syscall restart. */
pt_regs_clear_syscall(regs);
sigdelsetmask(&set, ~_BLOCKABLE);
set_current_blocked(&set);
return;
segv:
force_sig(SIGSEGV, current);
}
asmlinkage void
irix_sigreturn(struct pt_regs *regs)
{
struct sigctx_irix5 __user *context, *magic;
unsigned long umask, mask;
u64 *fregs;
u32 usedfp;
int error, sig, i, base = 0;
sigset_t blocked;
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
if (regs->regs[2] == 1000)
base = 1;
context = (struct sigctx_irix5 __user *) regs->regs[base + 4];
magic = (struct sigctx_irix5 __user *) regs->regs[base + 5];
sig = (int) regs->regs[base + 6];
#ifdef DEBUG_SIG
printk("[%s:%d] IRIX sigreturn(scp[%p],ucp[%p],sig[%d])\n",
current->comm, current->pid, context, magic, sig);
#endif
if (!context)
context = magic;
if (!access_ok(VERIFY_READ, context, sizeof(struct sigctx_irix5)))
goto badframe;
#ifdef DEBUG_SIG
dump_irix5_sigctx(context);
#endif
error = __get_user(regs->cp0_epc, &context->pc);
error |= __get_user(umask, &context->rmask);
mask = 2;
for (i = 1; i < 32; i++, mask <<= 1) {
if (umask & mask)
error |= __get_user(regs->regs[i], &context->regs[i]);
}
error |= __get_user(regs->hi, &context->hi);
error |= __get_user(regs->lo, &context->lo);
error |= __get_user(usedfp, &context->usedfp);
if ((umask & 1) && usedfp) {
fregs = (u64 *) ¤t->thread.fpu;
for(i = 0; i < 32; i++)
error |= __get_user(fregs[i], &context->fpregs[i]);
error |= __get_user(current->thread.fpu.hard.fcr31, &context->fpcsr);
}
/* XXX do sigstack crapola here... XXX */
error |= __copy_from_user(&blocked, &context->sigset, sizeof(blocked)) ? -EFAULT : 0;
if (error)
goto badframe;
sigdelsetmask(&blocked, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = blocked;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
/*
* Don't let your children do this ...
*/
if (current_thread_info()->flags & TIF_SYSCALL_TRACE)
do_syscall_trace(regs, 1);
__asm__ __volatile__(
"move\t$29,%0\n\t"
"j\tsyscall_exit"
:/* no outputs */
:"r" (®s));
/* Unreached */
badframe:
force_sig(SIGSEGV, current);
}