diff options
Diffstat (limited to 'arch/mips/kernel/irixsig.c')
| -rw-r--r-- | arch/mips/kernel/irixsig.c | 853 |
1 files changed, 853 insertions, 0 deletions
diff --git a/arch/mips/kernel/irixsig.c b/arch/mips/kernel/irixsig.c new file mode 100644 index 000000000000..3f956f809fa4 --- /dev/null +++ b/arch/mips/kernel/irixsig.c @@ -0,0 +1,853 @@ +/* + * 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 <asm/ptrace.h> +#include <asm/uaccess.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 void setup_irix_frame(struct k_sigaction *ka, struct pt_regs *regs, + int signr, sigset_t *oldmask) +{ + unsigned long sp; + struct sigctx_irix5 *ctx; + int i; + + sp = regs->regs[29]; + sp -= sizeof(struct sigctx_irix5); + sp &= ~(0xf); + ctx = (struct sigctx_irix5 *) sp; + if (!access_ok(VERIFY_WRITE, ctx, sizeof(*ctx))) + goto segv_and_exit; + + __put_user(0, &ctx->weird_fpu_thing); + __put_user(~(0x00000001), &ctx->rmask); + __put_user(0, &ctx->regs[0]); + for(i = 1; i < 32; i++) + __put_user((u64) regs->regs[i], &ctx->regs[i]); + + __put_user((u64) regs->hi, &ctx->hi); + __put_user((u64) regs->lo, &ctx->lo); + __put_user((u64) regs->cp0_epc, &ctx->pc); + __put_user(!!used_math(), &ctx->usedfp); + __put_user((u64) regs->cp0_cause, &ctx->cp0_cause); + __put_user((u64) regs->cp0_badvaddr, &ctx->cp0_badvaddr); + + __put_user(0, &ctx->sstk_flags); /* XXX sigstack unimp... todo... */ + + __copy_to_user(&ctx->sigset, oldmask, sizeof(irix_sigset_t)); + +#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; + +segv_and_exit: + force_sigsegv(signr, current); +} + +static void 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 void handle_signal(unsigned long sig, siginfo_t *info, + struct k_sigaction *ka, sigset_t *oldset, struct pt_regs * regs) +{ + 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) + setup_irix_rt_frame(ka, regs, sig, oldset, info); + else + setup_irix_frame(ka, regs, sig, oldset); + + if (!(ka->sa.sa_flags & SA_NODEFER)) { + spin_lock_irq(¤t->sighand->siglock); + sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); + sigaddset(¤t->blocked,sig); + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + } +} + +asmlinkage int do_irix_signal(sigset_t *oldset, struct pt_regs *regs) +{ + struct k_sigaction ka; + siginfo_t info; + int signr; + + /* + * 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 1; + + if (try_to_freeze(0)) + goto no_signal; + + if (!oldset) + oldset = ¤t->blocked; + + signr = get_signal_to_deliver(&info, &ka, regs, NULL); + if (signr > 0) { + handle_signal(signr, &info, &ka, oldset, regs); + return 1; + } + +no_signal: + /* + * 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; + } + } + return 0; +} + +asmlinkage void +irix_sigreturn(struct pt_regs *regs) +{ + struct sigctx_irix5 *context, *magic; + unsigned long umask, mask; + u64 *fregs; + int 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 *) regs->regs[base + 4]; + magic = (struct sigctx_irix5 *) 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 + + __get_user(regs->cp0_epc, &context->pc); + umask = context->rmask; mask = 2; + for (i = 1; i < 32; i++, mask <<= 1) { + if(umask & mask) + __get_user(regs->regs[i], &context->regs[i]); + } + __get_user(regs->hi, &context->hi); + __get_user(regs->lo, &context->lo); + + if ((umask & 1) && context->usedfp) { + fregs = (u64 *) ¤t->thread.fpu; + for(i = 0; i < 32; i++) + fregs[i] = (u64) context->fpregs[i]; + __get_user(current->thread.fpu.hard.fcr31, &context->fpcsr); + } + + /* XXX do sigstack crapola here... XXX */ + + if (__copy_from_user(&blocked, &context->sigset, sizeof(blocked))) + 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); +} + +struct sigact_irix5 { + int flags; + void (*handler)(int); + u32 sigset[4]; + int _unused0[2]; +}; + +#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 *act, + struct sigaction *oact, void *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; + if (!access_ok(VERIFY_READ, act, sizeof(*act)) || + __get_user(new_ka.sa.sa_handler, &act->sa_handler) || + __get_user(new_ka.sa.sa_flags, &act->sa_flags)) + return -EFAULT; + + __copy_from_user(&mask, &act->sa_mask, sizeof(sigset_t)); + + /* + * 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) { + if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || + __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || + __put_user(old_ka.sa.sa_flags, &oact->sa_flags)) + return -EFAULT; + __copy_to_user(&old_ka.sa.sa_mask, &oact->sa_mask, + sizeof(sigset_t)); + } + + return ret; +} + +asmlinkage int irix_sigpending(irix_sigset_t *set) +{ + return do_sigpending(set, sizeof(*set)); +} + +asmlinkage int irix_sigprocmask(int how, irix_sigset_t *new, irix_sigset_t *old) +{ + sigset_t oldbits, newbits; + + if (new) { + if (!access_ok(VERIFY_READ, new, sizeof(*new))) + return -EFAULT; + __copy_from_user(&newbits, new, sizeof(unsigned long)*4); + sigdelsetmask(&newbits, ~_BLOCKABLE); + + spin_lock_irq(¤t->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(¤t->sighand->siglock); + } + if(old) { + if (!access_ok(VERIFY_WRITE, old, sizeof(*old))) + return -EFAULT; + __copy_to_user(old, ¤t->blocked, sizeof(unsigned long)*4); + } + + return 0; +} + +asmlinkage int irix_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; + while (1) { + current->state = TASK_INTERRUPTIBLE; + schedule(); + if (do_irix_signal(&saveset, regs)) + return -EINTR; + } +} + +/* 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; +}; + +static inline unsigned long timespectojiffies(struct timespec *value) +{ + unsigned long sec = (unsigned) value->tv_sec; + long nsec = value->tv_nsec; + + if (sec > (LONG_MAX / HZ)) + return LONG_MAX; + nsec += 1000000000L / HZ - 1; + nsec /= 1000000000L / HZ; + return HZ * sec + nsec; +} + +asmlinkage int irix_sigpoll_sys(unsigned long *set, struct irix5_siginfo *info, + struct timespec *tp) +{ + long expire = MAX_SCHEDULE_TIMEOUT; + sigset_t kset; + int i, sig, error, timeo = 0; + +#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 (!access_ok(VERIFY_READ, set, sizeof(kset))) { + error = -EFAULT; + goto out; + } + + __copy_from_user(&kset, set, sizeof(set)); + if (error) + goto out; + + if (info && clear_user(info, sizeof(*info))) { + error = -EFAULT; + goto out; + } + + if (tp) { + if (!access_ok(VERIFY_READ, tp, sizeof(*tp))) + return -EFAULT; + if (!tp->tv_sec && !tp->tv_nsec) { + error = -EINVAL; + goto out; + } + expire = timespectojiffies(tp)+(tp->tv_sec||tp->tv_nsec); + } + + while(1) { + long tmp = 0; + + current->state = TASK_INTERRUPTIBLE; + expire = schedule_timeout(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 (¤t->pending.signal, sig)) { + /* XXX need more than this... */ + if (info) + info->sig = sig; + error = 0; + goto out; + } + } + + /* 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 + +extern int getrusage(struct task_struct *, int, struct rusage __user *); + +#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 *info, + int options, struct rusage *ru) +{ + int flag, retval; + DECLARE_WAITQUEUE(wait, current); + struct task_struct *tsk; + struct task_struct *p; + struct list_head *_p; + + if (!info) { + retval = -EINVAL; + goto out; + } + if (!access_ok(VERIFY_WRITE, info, sizeof(*info))) { + retval = -EFAULT; + goto out; + } + if (ru) { + if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru))) { + retval = -EFAULT; + goto out; + } + } + if (options & ~(W_MASK)) { + retval = -EINVAL; + goto out; + } + if (type != IRIX_P_PID && type != IRIX_P_PGID && type != IRIX_P_ALL) { + retval = -EINVAL; + goto out; + } + add_wait_queue(¤t->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, p->parent); + write_unlock_irq(&tasklist_lock); + retval = ru ? getrusage(p, RUSAGE_BOTH, ru) : 0; + if (!retval && ru) { + 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) { + 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); + __put_user(SIGCHLD, &info->sig); + __put_user(1, &info->code); /* CLD_EXITED */ + __put_user(p->pid, &info->stuff.procinfo.pid); + __put_user((p->exit_code >> 8) & 0xff, + &info->stuff.procinfo.procdata.child.status); + __put_user(p->utime, + &info->stuff.procinfo.procdata.child.utime); + __put_user(p->stime, + &info->stuff.procinfo.procdata.child.stime); + retval = 0; + if (p->real_parent != p->parent) { + write_lock_irq(&tasklist_lock); + remove_parent(p); + p->parent = p->real_parent; + add_parent(p, p->parent); + 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(¤t->signal->wait_chldexit, &wait); + +out: + 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 i, base = 0; + struct irix5_context *ctx; + unsigned long flags; + + if (regs->regs[2] == 1000) + base = 1; + ctx = (struct irix5_context *) 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; + + __put_user(current->thread.irix_oldctx, &ctx->link); + + __copy_to_user(&ctx->sigmask, ¤t->blocked, sizeof(irix_sigset_t)); + + /* XXX Do sigstack stuff someday... */ + __put_user(0, &ctx->stack.sp); + __put_user(0, &ctx->stack.size); + __put_user(0, &ctx->stack.flags); + + __put_user(0, &ctx->weird_graphics_thing); + __put_user(0, &ctx->regs[0]); + for (i = 1; i < 32; i++) + __put_user(regs->regs[i], &ctx->regs[i]); + __put_user(regs->lo, &ctx->regs[32]); + __put_user(regs->hi, &ctx->regs[33]); + __put_user(regs->cp0_cause, &ctx->regs[34]); + __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"); + } + __put_user(flags, &ctx->flags); + + return 0; +} + +asmlinkage unsigned long irix_setcontext(struct pt_regs *regs) +{ + int error, base = 0; + struct irix5_context *ctx; + + if(regs->regs[2] == 1000) + base = 1; + ctx = (struct irix5_context *) 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))) { + error = -EFAULT; + goto out; + } + + if (ctx->flags & 0x02) { + /* XXX sigstack garbage, todo... */ + printk("Wheee, cannot do sigstack stuff in setcontext\n"); + } + + if (ctx->flags & 0x04) { + int i; + + /* XXX extra control block stuff... todo... */ + for(i = 1; i < 32; i++) + regs->regs[i] = ctx->regs[i]; + regs->lo = ctx->regs[32]; + regs->hi = ctx->regs[33]; + regs->cp0_epc = ctx->regs[35]; + } + + if (ctx->flags & 0x08) { + /* XXX fpu context, blah... */ + printk("Wheee, cannot restore FPU context yet...\n"); + } + current->thread.irix_oldctx = ctx->link; + error = regs->regs[2]; + +out: + return error; +} + +struct irix_sigstack { unsigned long sp; int status; }; + +asmlinkage int irix_sigstack(struct irix_sigstack *new, struct irix_sigstack *old) +{ + int error = -EFAULT; + +#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))) + goto out; + } + + if(old) { + if (!access_ok(VERIFY_WRITE, old, sizeof(*old))) + goto out; + } + error = 0; + +out: + return error; +} + +struct irix_sigaltstack { unsigned long sp; int size; int status; }; + +asmlinkage int irix_sigaltstack(struct irix_sigaltstack *new, + struct irix_sigaltstack *old) +{ + int error = -EFAULT; + +#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))) + goto out; + } + + if (old) { + if (!access_ok(VERIFY_WRITE, old, sizeof(*old))) + goto out; + } + error = 0; + +out: + error = 0; + + return error; +} + +struct irix_procset { + int cmd, ltype, lid, rtype, rid; +}; + +asmlinkage int irix_sigsendset(struct irix_procset *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; +} |
