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OpenCloudOS-Kernel/arch/mips/kernel/irixsig.c

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/*
* irixsig.c: WHEEE, IRIX signals! YOW, am I compatible or what?!?!
*
* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
* Copyright (C) 1997 - 2000 Ralf Baechle (ralf@gnu.org)
* Copyright (C) 2000 Silicon Graphics, Inc.
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/time.h>
#include <linux/ptrace.h>
#include <linux/resource.h>
#include <asm/ptrace.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
#undef DEBUG_SIG
#define _S(nr) (1<<((nr)-1))
#define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP)))
typedef struct {
unsigned long sig[4];
} irix_sigset_t;
struct sigctx_irix5 {
u32 rmask, cp0_status;
u64 pc;
u64 regs[32];
u64 fpregs[32];
u32 usedfp, fpcsr, fpeir, sstk_flags;
u64 hi, lo;
u64 cp0_cause, cp0_badvaddr, _unused0;
irix_sigset_t sigset;
u64 weird_fpu_thing;
u64 _unused1[31];
};
#ifdef DEBUG_SIG
/* Debugging */
static inline void dump_irix5_sigctx(struct sigctx_irix5 *c)
{
int i;
printk("misc: rmask[%08lx] status[%08lx] pc[%08lx]\n",
(unsigned long) c->rmask,
(unsigned long) c->cp0_status,
(unsigned long) c->pc);
printk("regs: ");
for(i = 0; i < 16; i++)
printk("[%d]<%08lx> ", i, (unsigned long) c->regs[i]);
printk("\nregs: ");
for(i = 16; i < 32; i++)
printk("[%d]<%08lx> ", i, (unsigned long) c->regs[i]);
printk("\nfpregs: ");
for(i = 0; i < 16; i++)
printk("[%d]<%08lx> ", i, (unsigned long) c->fpregs[i]);
printk("\nfpregs: ");
for(i = 16; i < 32; i++)
printk("[%d]<%08lx> ", i, (unsigned long) c->fpregs[i]);
printk("misc: usedfp[%d] fpcsr[%08lx] fpeir[%08lx] stk_flgs[%08lx]\n",
(int) c->usedfp, (unsigned long) c->fpcsr,
(unsigned long) c->fpeir, (unsigned long) c->sstk_flags);
printk("misc: hi[%08lx] lo[%08lx] cause[%08lx] badvaddr[%08lx]\n",
(unsigned long) c->hi, (unsigned long) c->lo,
(unsigned long) c->cp0_cause, (unsigned long) c->cp0_badvaddr);
printk("misc: sigset<0>[%08lx] sigset<1>[%08lx] sigset<2>[%08lx] "
"sigset<3>[%08lx]\n", (unsigned long) c->sigset.sig[0],
(unsigned long) c->sigset.sig[1],
(unsigned long) c->sigset.sig[2],
(unsigned long) c->sigset.sig[3]);
}
#endif
static int setup_irix_frame(struct k_sigaction *ka, struct pt_regs *regs,
int signr, sigset_t *oldmask)
{
struct sigctx_irix5 __user *ctx;
unsigned long sp;
int error, i;
sp = regs->regs[29];
sp -= sizeof(struct sigctx_irix5);
sp &= ~(0xf);
ctx = (struct sigctx_irix5 __user *) sp;
if (!access_ok(VERIFY_WRITE, ctx, sizeof(*ctx)))
goto segv_and_exit;
error = __put_user(0, &ctx->weird_fpu_thing);
error |= __put_user(~(0x00000001), &ctx->rmask);
error |= __put_user(0, &ctx->regs[0]);
for(i = 1; i < 32; i++)
error |= __put_user((u64) regs->regs[i], &ctx->regs[i]);
error |= __put_user((u64) regs->hi, &ctx->hi);
error |= __put_user((u64) regs->lo, &ctx->lo);
error |= __put_user((u64) regs->cp0_epc, &ctx->pc);
error |= __put_user(!!used_math(), &ctx->usedfp);
error |= __put_user((u64) regs->cp0_cause, &ctx->cp0_cause);
error |= __put_user((u64) regs->cp0_badvaddr, &ctx->cp0_badvaddr);
error |= __put_user(0, &ctx->sstk_flags); /* XXX sigstack unimp... todo... */
error |= __copy_to_user(&ctx->sigset, oldmask, sizeof(irix_sigset_t)) ? -EFAULT : 0;
if (error)
goto segv_and_exit;
#ifdef DEBUG_SIG
dump_irix5_sigctx(ctx);
#endif
regs->regs[4] = (unsigned long) signr;
regs->regs[5] = 0; /* XXX sigcode XXX */
regs->regs[6] = regs->regs[29] = sp;
regs->regs[7] = (unsigned long) ka->sa.sa_handler;
regs->regs[25] = regs->cp0_epc = (unsigned long) ka->sa_restorer;
return 1;
segv_and_exit:
force_sigsegv(signr, current);
return 0;
}
static int inline
setup_irix_rt_frame(struct k_sigaction * ka, struct pt_regs *regs,
int signr, sigset_t *oldmask, siginfo_t *info)
{
printk("Aiee: setup_tr_frame wants to be written");
do_exit(SIGSEGV);
}
static inline int handle_signal(unsigned long sig, siginfo_t *info,
struct k_sigaction *ka, sigset_t *oldset, struct pt_regs * regs)
{
int ret;
switch(regs->regs[0]) {
case ERESTARTNOHAND:
regs->regs[2] = EINTR;
break;
case ERESTARTSYS:
if(!(ka->sa.sa_flags & SA_RESTART)) {
regs->regs[2] = EINTR;
break;
}
/* fallthrough */
case ERESTARTNOINTR: /* Userland will reload $v0. */
regs->cp0_epc -= 8;
}
regs->regs[0] = 0; /* Don't deal with this again. */
if (ka->sa.sa_flags & SA_SIGINFO)
ret = setup_irix_rt_frame(ka, regs, sig, oldset, info);
else
ret = setup_irix_frame(ka, regs, sig, oldset);
spin_lock_irq(&current->sighand->siglock);
sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
if (!(ka->sa.sa_flags & SA_NODEFER))
sigaddset(&current->blocked,sig);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
return ret;
}
void do_irix_signal(struct pt_regs *regs)
{
struct k_sigaction ka;
siginfo_t info;
int signr;
sigset_t *oldset;
/*
* We want the common case to go fast, which is why we may in certain
* cases get here from kernel mode. Just return without doing anything
* if so.
*/
if (!user_mode(regs))
return;
if (test_thread_flag(TIF_RESTORE_SIGMASK))
oldset = &current->saved_sigmask;
else
oldset = &current->blocked;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
/* Whee! Actually deliver the signal. */
if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
/* a signal was successfully delivered; the saved
* sigmask will have been stored in the signal frame,
* and will be restored by sigreturn, so we can simply
* clear the TIF_RESTORE_SIGMASK flag */
if (test_thread_flag(TIF_RESTORE_SIGMASK))
clear_thread_flag(TIF_RESTORE_SIGMASK);
}
return;
}
/*
* Who's code doesn't conform to the restartable syscall convention
* dies here!!! The li instruction, a single machine instruction,
* must directly be followed by the syscall instruction.
*/
if (regs->regs[0]) {
if (regs->regs[2] == ERESTARTNOHAND ||
regs->regs[2] == ERESTARTSYS ||
regs->regs[2] == ERESTARTNOINTR) {
regs->cp0_epc -= 8;
}
if (regs->regs[2] == ERESTART_RESTARTBLOCK) {
regs->regs[2] = __NR_restart_syscall;
regs->regs[7] = regs->regs[26];
regs->cp0_epc -= 4;
}
regs->regs[0] = 0; /* Don't deal with this again. */
}
/*
* If there's no signal to deliver, we just put the saved sigmask
* back
*/
if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
clear_thread_flag(TIF_RESTORE_SIGMASK);
sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
}
}
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 *) &current->thread.fpu;
for(i = 0; i < 32; i++)
error |= __get_user(fregs[i], &context->fpregs[i]);
error |= __get_user(current->thread.fpu.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(&current->sighand->siglock);
current->blocked = blocked;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
/*
* Don't let your children do this ...
*/
__asm__ __volatile__(
"move\t$29,%0\n\t"
"j\tsyscall_exit"
:/* no outputs */
:"r" (&regs));
/* Unreached */
badframe:
force_sig(SIGSEGV, current);
}
struct sigact_irix5 {
int flags;
void (*handler)(int);
u32 sigset[4];
int _unused0[2];
};
#define SIG_SETMASK32 256 /* Goodie from SGI for BSD compatibility:
set only the low 32 bit of the sigset. */
#ifdef DEBUG_SIG
static inline void dump_sigact_irix5(struct sigact_irix5 *p)
{
printk("<f[%d] hndlr[%08lx] msk[%08lx]>", p->flags,
(unsigned long) p->handler,
(unsigned long) p->sigset[0]);
}
#endif
asmlinkage int
irix_sigaction(int sig, const struct sigaction __user *act,
struct sigaction __user *oact, void __user *trampoline)
{
struct k_sigaction new_ka, old_ka;
int ret;
#ifdef DEBUG_SIG
printk(" (%d,%s,%s,%08lx) ", sig, (!new ? "0" : "NEW"),
(!old ? "0" : "OLD"), trampoline);
if(new) {
dump_sigact_irix5(new); printk(" ");
}
#endif
if (act) {
sigset_t mask;
int err;
if (!access_ok(VERIFY_READ, act, sizeof(*act)))
return -EFAULT;
err = __get_user(new_ka.sa.sa_handler, &act->sa_handler);
err |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
err |= __copy_from_user(&mask, &act->sa_mask, sizeof(sigset_t)) ? -EFAULT : 0;
if (err)
return err;
/*
* Hmmm... methinks IRIX libc always passes a valid trampoline
* value for all invocations of sigaction. Will have to
* investigate. POSIX POSIX, die die die...
*/
new_ka.sa_restorer = trampoline;
}
/* XXX Implement SIG_SETMASK32 for IRIX compatibility */
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
int err;
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
return -EFAULT;
err = __put_user(old_ka.sa.sa_handler, &oact->sa_handler);
err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
err |= __copy_to_user(&oact->sa_mask, &old_ka.sa.sa_mask,
sizeof(sigset_t)) ? -EFAULT : 0;
if (err)
return -EFAULT;
}
return ret;
}
asmlinkage int irix_sigpending(irix_sigset_t __user *set)
{
return do_sigpending(set, sizeof(*set));
}
asmlinkage int irix_sigprocmask(int how, irix_sigset_t __user *new,
irix_sigset_t __user *old)
{
sigset_t oldbits, newbits;
if (new) {
if (!access_ok(VERIFY_READ, new, sizeof(*new)))
return -EFAULT;
if (__copy_from_user(&newbits, new, sizeof(unsigned long)*4))
return -EFAULT;
sigdelsetmask(&newbits, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
oldbits = current->blocked;
switch(how) {
case 1:
sigorsets(&newbits, &oldbits, &newbits);
break;
case 2:
sigandsets(&newbits, &oldbits, &newbits);
break;
case 3:
break;
case 256:
siginitset(&newbits, newbits.sig[0]);
break;
default:
return -EINVAL;
}
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
}
if (old)
return copy_to_user(old, &current->blocked,
sizeof(unsigned long)*4) ? -EFAULT : 0;
return 0;
}
asmlinkage int irix_sigsuspend(struct pt_regs *regs)
{
sigset_t newset;
sigset_t __user *uset;
uset = (sigset_t __user *) regs->regs[4];
if (copy_from_user(&newset, uset, sizeof(sigset_t)))
return -EFAULT;
sigdelsetmask(&newset, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
current->saved_sigmask = current->blocked;
current->blocked = newset;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_thread_flag(TIF_RESTORE_SIGMASK);
return -ERESTARTNOHAND;
}
/* hate hate hate... */
struct irix5_siginfo {
int sig, code, error;
union {
char unused[128 - (3 * 4)]; /* Safety net. */
struct {
int pid;
union {
int uid;
struct {
int utime, status, stime;
} child;
} procdata;
} procinfo;
unsigned long fault_addr;
struct {
int fd;
long band;
} fileinfo;
unsigned long sigval;
} stuff;
};
asmlinkage int irix_sigpoll_sys(unsigned long __user *set,
struct irix5_siginfo __user *info, struct timespec __user *tp)
{
long expire = MAX_SCHEDULE_TIMEOUT;
sigset_t kset;
int i, sig, error, timeo = 0;
struct timespec ktp;
#ifdef DEBUG_SIG
printk("[%s:%d] irix_sigpoll_sys(%p,%p,%p)\n",
current->comm, current->pid, set, info, tp);
#endif
/* Must always specify the signal set. */
if (!set)
return -EINVAL;
if (copy_from_user(&kset, set, sizeof(set)))
return -EFAULT;
if (info && clear_user(info, sizeof(*info))) {
error = -EFAULT;
goto out;
}
if (tp) {
if (copy_from_user(&ktp, tp, sizeof(*tp)))
return -EFAULT;
if (!ktp.tv_sec && !ktp.tv_nsec)
return -EINVAL;
expire = timespec_to_jiffies(&ktp) +
(ktp.tv_sec || ktp.tv_nsec);
}
while(1) {
long tmp = 0;
expire = schedule_timeout_interruptible(expire);
for (i=0; i<=4; i++)
tmp |= (current->pending.signal.sig[i] & kset.sig[i]);
if (tmp)
break;
if (!expire) {
timeo = 1;
break;
}
if (signal_pending(current))
return -EINTR;
}
if (timeo)
return -EAGAIN;
for (sig = 1; i <= 65 /* IRIX_NSIG */; sig++) {
if (sigismember (&kset, sig))
continue;
if (sigismember (&current->pending.signal, sig)) {
/* XXX need more than this... */
if (info)
return copy_to_user(&info->sig, &sig, sizeof(sig));
return 0;
}
}
/* Should not get here, but do something sane if we do. */
error = -EINTR;
out:
return error;
}
/* This is here because of irix5_siginfo definition. */
#define IRIX_P_PID 0
#define IRIX_P_PGID 2
#define IRIX_P_ALL 7
#define W_EXITED 1
#define W_TRAPPED 2
#define W_STOPPED 4
#define W_CONT 8
#define W_NOHANG 64
#define W_MASK (W_EXITED | W_TRAPPED | W_STOPPED | W_CONT | W_NOHANG)
asmlinkage int irix_waitsys(int type, int pid,
struct irix5_siginfo __user *info, int options,
struct rusage __user *ru)
{
int flag, retval;
DECLARE_WAITQUEUE(wait, current);
struct task_struct *tsk;
struct task_struct *p;
struct list_head *_p;
if (!info)
return -EINVAL;
if (!access_ok(VERIFY_WRITE, info, sizeof(*info)))
return -EFAULT;
if (ru)
if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)))
return -EFAULT;
if (options & ~W_MASK)
return -EINVAL;
if (type != IRIX_P_PID && type != IRIX_P_PGID && type != IRIX_P_ALL)
return -EINVAL;
add_wait_queue(&current->signal->wait_chldexit, &wait);
repeat:
flag = 0;
current->state = TASK_INTERRUPTIBLE;
read_lock(&tasklist_lock);
tsk = current;
list_for_each(_p,&tsk->children) {
p = list_entry(_p,struct task_struct,sibling);
if ((type == IRIX_P_PID) && p->pid != pid)
continue;
if ((type == IRIX_P_PGID) && process_group(p) != pid)
continue;
if ((p->exit_signal != SIGCHLD))
continue;
flag = 1;
switch (p->state) {
case TASK_STOPPED:
if (!p->exit_code)
continue;
if (!(options & (W_TRAPPED|W_STOPPED)) &&
!(p->ptrace & PT_PTRACED))
continue;
read_unlock(&tasklist_lock);
/* move to end of parent's list to avoid starvation */
write_lock_irq(&tasklist_lock);
remove_parent(p);
add_parent(p);
write_unlock_irq(&tasklist_lock);
retval = ru ? getrusage(p, RUSAGE_BOTH, ru) : 0;
if (retval)
goto end_waitsys;
retval = __put_user(SIGCHLD, &info->sig);
retval |= __put_user(0, &info->code);
retval |= __put_user(p->pid, &info->stuff.procinfo.pid);
retval |= __put_user((p->exit_code >> 8) & 0xff,
&info->stuff.procinfo.procdata.child.status);
retval |= __put_user(p->utime, &info->stuff.procinfo.procdata.child.utime);
retval |= __put_user(p->stime, &info->stuff.procinfo.procdata.child.stime);
if (retval)
goto end_waitsys;
p->exit_code = 0;
goto end_waitsys;
case EXIT_ZOMBIE:
current->signal->cutime += p->utime + p->signal->cutime;
current->signal->cstime += p->stime + p->signal->cstime;
if (ru != NULL)
getrusage(p, RUSAGE_BOTH, ru);
retval = __put_user(SIGCHLD, &info->sig);
retval |= __put_user(1, &info->code); /* CLD_EXITED */
retval |= __put_user(p->pid, &info->stuff.procinfo.pid);
retval |= __put_user((p->exit_code >> 8) & 0xff,
&info->stuff.procinfo.procdata.child.status);
retval |= __put_user(p->utime,
&info->stuff.procinfo.procdata.child.utime);
retval |= __put_user(p->stime,
&info->stuff.procinfo.procdata.child.stime);
if (retval)
return retval;
if (p->real_parent != p->parent) {
write_lock_irq(&tasklist_lock);
remove_parent(p);
p->parent = p->real_parent;
add_parent(p);
do_notify_parent(p, SIGCHLD);
write_unlock_irq(&tasklist_lock);
} else
release_task(p);
goto end_waitsys;
default:
continue;
}
tsk = next_thread(tsk);
}
read_unlock(&tasklist_lock);
if (flag) {
retval = 0;
if (options & W_NOHANG)
goto end_waitsys;
retval = -ERESTARTSYS;
if (signal_pending(current))
goto end_waitsys;
current->state = TASK_INTERRUPTIBLE;
schedule();
goto repeat;
}
retval = -ECHILD;
end_waitsys:
current->state = TASK_RUNNING;
remove_wait_queue(&current->signal->wait_chldexit, &wait);
return retval;
}
struct irix5_context {
u32 flags;
u32 link;
u32 sigmask[4];
struct { u32 sp, size, flags; } stack;
int regs[36];
u32 fpregs[32];
u32 fpcsr;
u32 _unused0;
u32 _unused1[47];
u32 weird_graphics_thing;
};
asmlinkage int irix_getcontext(struct pt_regs *regs)
{
int error, i, base = 0;
struct irix5_context __user *ctx;
unsigned long flags;
if (regs->regs[2] == 1000)
base = 1;
ctx = (struct irix5_context __user *) regs->regs[base + 4];
#ifdef DEBUG_SIG
printk("[%s:%d] irix_getcontext(%p)\n",
current->comm, current->pid, ctx);
#endif
if (!access_ok(VERIFY_WRITE, ctx, sizeof(*ctx)));
return -EFAULT;
error = __put_user(current->thread.irix_oldctx, &ctx->link);
error |= __copy_to_user(&ctx->sigmask, &current->blocked, sizeof(irix_sigset_t)) ? -EFAULT : 0;
/* XXX Do sigstack stuff someday... */
error |= __put_user(0, &ctx->stack.sp);
error |= __put_user(0, &ctx->stack.size);
error |= __put_user(0, &ctx->stack.flags);
error |= __put_user(0, &ctx->weird_graphics_thing);
error |= __put_user(0, &ctx->regs[0]);
for (i = 1; i < 32; i++)
error |= __put_user(regs->regs[i], &ctx->regs[i]);
error |= __put_user(regs->lo, &ctx->regs[32]);
error |= __put_user(regs->hi, &ctx->regs[33]);
error |= __put_user(regs->cp0_cause, &ctx->regs[34]);
error |= __put_user(regs->cp0_epc, &ctx->regs[35]);
flags = 0x0f;
if (!used_math()) {
flags &= ~(0x08);
} else {
/* XXX wheee... */
printk("Wheee, no code for saving IRIX FPU context yet.\n");
}
error |= __put_user(flags, &ctx->flags);
return error;
}
asmlinkage void irix_setcontext(struct pt_regs *regs)
{
struct irix5_context __user *ctx;
int err, base = 0;
u32 flags;
if (regs->regs[2] == 1000)
base = 1;
ctx = (struct irix5_context __user *) regs->regs[base + 4];
#ifdef DEBUG_SIG
printk("[%s:%d] irix_setcontext(%p)\n",
current->comm, current->pid, ctx);
#endif
if (!access_ok(VERIFY_READ, ctx, sizeof(*ctx)))
goto segv_and_exit;
err = __get_user(flags, &ctx->flags);
if (flags & 0x02) {
/* XXX sigstack garbage, todo... */
printk("Wheee, cannot do sigstack stuff in setcontext\n");
}
if (flags & 0x04) {
int i;
/* XXX extra control block stuff... todo... */
for (i = 1; i < 32; i++)
err |= __get_user(regs->regs[i], &ctx->regs[i]);
err |= __get_user(regs->lo, &ctx->regs[32]);
err |= __get_user(regs->hi, &ctx->regs[33]);
err |= __get_user(regs->cp0_epc, &ctx->regs[35]);
}
if (flags & 0x08)
/* XXX fpu context, blah... */
printk(KERN_ERR "Wheee, cannot restore FPU context yet...\n");
err |= __get_user(current->thread.irix_oldctx, &ctx->link);
if (err)
goto segv_and_exit;
/*
* Don't let your children do this ...
*/
__asm__ __volatile__(
"move\t$29,%0\n\t"
"j\tsyscall_exit"
:/* no outputs */
:"r" (&regs));
/* Unreached */
segv_and_exit:
force_sigsegv(SIGSEGV, current);
}
struct irix_sigstack {
unsigned long sp;
int status;
};
asmlinkage int irix_sigstack(struct irix_sigstack __user *new,
struct irix_sigstack __user *old)
{
#ifdef DEBUG_SIG
printk("[%s:%d] irix_sigstack(%p,%p)\n",
current->comm, current->pid, new, old);
#endif
if (new) {
if (!access_ok(VERIFY_READ, new, sizeof(*new)))
return -EFAULT;
}
if (old) {
if (!access_ok(VERIFY_WRITE, old, sizeof(*old)))
return -EFAULT;
}
return 0;
}
struct irix_sigaltstack { unsigned long sp; int size; int status; };
asmlinkage int irix_sigaltstack(struct irix_sigaltstack __user *new,
struct irix_sigaltstack __user *old)
{
#ifdef DEBUG_SIG
printk("[%s:%d] irix_sigaltstack(%p,%p)\n",
current->comm, current->pid, new, old);
#endif
if (new)
if (!access_ok(VERIFY_READ, new, sizeof(*new)))
return -EFAULT;
if (old) {
if (!access_ok(VERIFY_WRITE, old, sizeof(*old)))
return -EFAULT;
}
return 0;
}
struct irix_procset {
int cmd, ltype, lid, rtype, rid;
};
asmlinkage int irix_sigsendset(struct irix_procset __user *pset, int sig)
{
if (!access_ok(VERIFY_READ, pset, sizeof(*pset)))
return -EFAULT;
#ifdef DEBUG_SIG
printk("[%s:%d] irix_sigsendset([%d,%d,%d,%d,%d],%d)\n",
current->comm, current->pid,
pset->cmd, pset->ltype, pset->lid, pset->rtype, pset->rid,
sig);
#endif
return -EINVAL;
}
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