unsigned long
search_exception_table(unsigned long addr)
{
unsigned long ret;
#ifndef CONFIG_MODULES
addr &= 0x7fffffff; /* remove amode bit from address */
/* There is only the kernel to search. */
ret = search_one_table(__start___ex_table, __stop___ex_table-1, addr);
if (ret) return FIX_PSW(ret);
#else
/* The kernel is the last "module" -- no need to treat it special. */
struct module *mp;
addr &= 0x7fffffff; /* remove amode bit from address */
for (mp = module_list; mp != NULL; mp = mp->next) {
if (mp->ex_table_start == NULL)
continue;
ret = search_one_table(mp->ex_table_start,
mp->ex_table_end - 1, addr);
if (ret) return FIX_PSW(ret);
}
#endif
return 0;
}
static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs * regs)
{
int err = 0;
rt_sigframe *frame = get_sigframe(ka, regs, sizeof(rt_sigframe));
if (!access_ok(VERIFY_WRITE, frame, sizeof(rt_sigframe)))
goto give_sigsegv;
if (copy_siginfo_to_user(&frame->info, info))
goto give_sigsegv;
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(0, &frame->uc.uc_link);
err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->gprs[15]),
&frame->uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
err |= save_sigregs(regs, &frame->uc.uc_mcontext);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
if (err)
goto give_sigsegv;
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->sa.sa_flags & SA_RESTORER) {
regs->gprs[14] = FIX_PSW(ka->sa.sa_restorer);
} else {
regs->gprs[14] = FIX_PSW(frame->retcode);
err |= __put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn,
(u16 *)(frame->retcode));
}
/* Set up backchain. */
if (__put_user(regs->gprs[15], (addr_t *) frame))
goto give_sigsegv;
/* Set up registers for signal handler */
regs->gprs[15] = (addr_t)frame;
regs->psw.addr = FIX_PSW(ka->sa.sa_handler);
regs->psw.mask = _USER_PSW_MASK;
regs->gprs[2] = map_signal(sig);
regs->gprs[3] = (addr_t)&frame->info;
regs->gprs[4] = (addr_t)&frame->uc;
return;
give_sigsegv:
if (sig == SIGSEGV)
ka->sa.sa_handler = SIG_DFL;
force_sig(SIGSEGV, current);
}
static void setup_frame(int sig, struct k_sigaction *ka,
sigset_t *set, struct pt_regs * regs)
{
sigframe *frame = get_sigframe(ka, regs, sizeof(sigframe));
if (!access_ok(VERIFY_WRITE, frame, sizeof(sigframe)))
goto give_sigsegv;
if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE))
goto give_sigsegv;
if (save_sigregs(regs, &frame->sregs))
goto give_sigsegv;
if (__put_user(&frame->sregs, &frame->sc.sregs))
goto give_sigsegv;
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->sa.sa_flags & SA_RESTORER) {
regs->gprs[14] = FIX_PSW(ka->sa.sa_restorer);
} else {
regs->gprs[14] = FIX_PSW(frame->retcode);
if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn,
(u16 *)(frame->retcode)))
goto give_sigsegv;
}
/* Set up backchain. */
if (__put_user(regs->gprs[15], (addr_t *) frame))
goto give_sigsegv;
/* Set up registers for signal handler */
regs->gprs[15] = (addr_t)frame;
regs->psw.addr = FIX_PSW(ka->sa.sa_handler);
regs->psw.mask = _USER_PSW_MASK;
regs->gprs[2] = map_signal(sig);
regs->gprs[3] = (addr_t)&frame->sc;
/* We forgot to include these in the sigcontext.
To avoid breaking binary compatibility, they are passed as args. */
regs->gprs[4] = current->thread.trap_no;
regs->gprs[5] = current->thread.prot_addr;
return;
give_sigsegv:
if (sig == SIGSEGV)
ka->sa.sa_handler = SIG_DFL;
force_sig(SIGSEGV, current);
}
static void *setup_frame_common(int sig, struct k_sigaction *ka,
sigset_t *set, struct pt_regs * regs,
int frame_size,u16 retcode)
{
sigframe *frame;
int err;
frame = get_sigframe(ka, regs,frame_size);
if (!access_ok(VERIFY_WRITE, frame,frame_size))
return 0;
err = save_sigregs(regs,&frame->sregs);
if(!err)
err=__put_user(&frame->sregs,&frame->sc.sregs);
if(!err)
err=__copy_to_user(&frame->sc.oldmask,&set->sig,SIGMASK_COPY_SIZE);
if(!err)
{
regs->gprs[2]=(current->exec_domain
&& current->exec_domain->signal_invmap
&& sig < 32
? current->exec_domain->signal_invmap[sig]
: sig);
/* Set up registers for signal handler */
regs->gprs[15] = (addr_t)frame;
regs->psw.addr = FIX_PSW(ka->sa.sa_handler);
}
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->sa.sa_flags & SA_RESTORER) {
regs->gprs[14] = FIX_PSW(ka->sa.sa_restorer);
} else {
regs->gprs[14] = FIX_PSW(frame->retcode);
err |= __put_user(retcode, (u16 *)(frame->retcode));
}
return(err ? 0:frame);
}
