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-rw-r--r--arch/mips/kernel/irixsig.c826
1 files changed, 826 insertions, 0 deletions
diff --git a/arch/mips/kernel/irixsig.c b/arch/mips/kernel/irixsig.c
new file mode 100644
index 000000000..94f8004f6
--- /dev/null
+++ b/arch/mips/kernel/irixsig.c
@@ -0,0 +1,826 @@
+/* $Id: irixsig.c,v 1.5 1996/08/05 09:20:56 dm Exp $
+ * irixsig.c: WHEEE, IRIX signals! YOW, am I compatable or what?!?!
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+
+#include <asm/ptrace.h>
+#include <asm/uaccess.h>
+
+#undef DEBUG_SIG
+
+#define _S(nr) (1<<((nr)-1))
+
+#define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP)))
+
+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;
+ u32 sigset[4];
+ 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[0],
+ (unsigned long) c->sigset[1], (unsigned long) c->sigset[2],
+ (unsigned long) c->sigset[3]);
+}
+#endif
+
+static void setup_irix_frame(struct sigaction * sa, struct pt_regs *regs,
+ int signr, unsigned long 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)))
+ do_exit(SIGSEGV);
+
+ __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(current->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... */
+
+ __put_user(0, &ctx->sigset[1]);
+ __put_user(0, &ctx->sigset[2]);
+ __put_user(0, &ctx->sigset[3]);
+ __put_user(oldmask, &ctx->sigset[0]);
+
+#ifdef DEBUG_SIG
+ dump_irix5_sigctx(ctx);
+#endif
+
+ regs->regs[5] = 0; /* XXX sigcode XXX */
+ regs->regs[4] = (unsigned long) signr;
+ regs->regs[6] = regs->regs[29] = sp;
+ regs->regs[7] = (unsigned long) sa->sa_handler;
+ regs->regs[25] = regs->cp0_epc = current->tss.irix_trampoline;
+}
+
+extern asmlinkage int sys_waitpid(pid_t pid,unsigned long * stat_addr, int options);
+
+asmlinkage int do_irix_signal(unsigned long oldmask, struct pt_regs * regs)
+{
+ unsigned long mask = ~current->blocked;
+ unsigned long handler_signal = 0;
+ unsigned long signr;
+ struct sigaction * sa;
+
+#ifdef DEBUG_SIG
+ printk("[%s:%d] Delivering IRIX signal oldmask=%08lx\n",
+ current->comm, current->pid, oldmask);
+#endif
+ while ((signr = current->signal & mask)) {
+ signr = ffz(~signr);
+ clear_bit(signr, &current->signal);
+ sa = current->sig->action + signr;
+ signr++;
+ if ((current->flags & PF_PTRACED) && signr != SIGKILL) {
+ current->exit_code = signr;
+ current->state = TASK_STOPPED;
+ notify_parent(current);
+ schedule();
+ if (!(signr = current->exit_code))
+ continue;
+ current->exit_code = 0;
+ if (signr == SIGSTOP)
+ continue;
+ if (_S(signr) & current->blocked) {
+ current->signal |= _S(signr);
+ continue;
+ }
+ sa = current->sig->action + signr - 1;
+ }
+ if (sa->sa_handler == SIG_IGN) {
+ if (signr != SIGCHLD)
+ continue;
+ /* check for SIGCHLD: it's special */
+ while (sys_waitpid(-1,NULL,WNOHANG) > 0)
+ /* nothing */;
+ continue;
+ }
+ if (sa->sa_handler == SIG_DFL) {
+ if (current->pid == 1)
+ continue;
+ switch (signr) {
+ case SIGCONT: case SIGCHLD: case SIGWINCH:
+ continue;
+
+ case SIGSTOP: case SIGTSTP: case SIGTTIN: case SIGTTOU:
+ if (current->flags & PF_PTRACED)
+ continue;
+ current->state = TASK_STOPPED;
+ current->exit_code = signr;
+ if (!(current->p_pptr->sig->action[SIGCHLD-1].sa_flags &
+ SA_NOCLDSTOP))
+ notify_parent(current);
+ schedule();
+ continue;
+
+ case SIGQUIT: case SIGILL: case SIGTRAP:
+ case SIGIOT: case SIGFPE: case SIGSEGV: case SIGBUS:
+ if (current->binfmt && current->binfmt->core_dump) {
+ if (current->binfmt->core_dump(signr, regs))
+ signr |= 0x80;
+ }
+ /* fall through */
+ default:
+ current->signal |= _S(signr & 0x7f);
+ current->flags |= PF_SIGNALED;
+ do_exit(signr);
+ }
+ }
+ /*
+ * OK, we're invoking a handler
+ */
+ if (regs->orig_reg2 >= 0) {
+ if (regs->regs[2] == ERESTARTNOHAND) {
+ regs->regs[2] = EINTR;
+ } else if((regs->regs[2] == ERESTARTSYS &&
+ !(sa->sa_flags & SA_RESTART))) {
+ regs->regs[2] = regs->orig_reg2;
+ regs->cp0_epc -= 8;
+ }
+ }
+ handler_signal |= 1 << (signr-1);
+ mask &= ~*to_k_sigset_t(&sa->sa_mask);
+ }
+ /*
+ * 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->orig_reg2 >= 0 &&
+ (regs->regs[2] == ERESTARTNOHAND ||
+ regs->regs[2] == ERESTARTSYS ||
+ regs->regs[2] == ERESTARTNOINTR)) {
+ regs->regs[2] = regs->orig_reg2;
+ regs->cp0_epc -= 8;
+ }
+ if (!handler_signal) /* no handler will be called - return 0 */
+ return 0;
+ signr = 1;
+ sa = current->sig->action;
+ for (mask = 1 ; mask ; sa++,signr++,mask += mask) {
+ if (mask > handler_signal)
+ break;
+ if (!(mask & handler_signal))
+ continue;
+ setup_irix_frame(sa, regs, signr, oldmask);
+ if (sa->sa_flags & SA_ONESHOT)
+ sa->sa_handler = NULL;
+ current->blocked |= *to_k_sigset_t(&sa->sa_mask);
+ oldmask |= *to_k_sigset_t(&sa->sa_mask);
+ }
+
+ return 1;
+}
+
+asmlinkage unsigned long irix_sigreturn(struct pt_regs *regs)
+{
+ struct sigctx_irix5 *context, *magic;
+ unsigned long umask, mask;
+ u64 *fregs, res;
+ int sig, i, base = 0;
+
+ 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 *) &current->tss.fpu;
+ for(i = 0; i < 32; i++)
+ fregs[i] = (u64) context->fpregs[i];
+ __get_user(current->tss.fpu.hard.control, &context->fpcsr);
+ }
+
+ /* XXX do sigstack crapola here... XXX */
+
+ regs->orig_reg2 = -1;
+ __get_user(current->blocked, &context->sigset[0]);
+ current->blocked &= _BLOCKABLE;
+ __get_user(res, &context->regs[2]);
+ return res;
+
+badframe:
+ do_exit(SIGSEGV);
+}
+
+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
+
+static inline void check_pending(int signum)
+{
+ struct sigaction *p;
+
+ p = signum - 1 + current->sig->action;
+ if (p->sa_handler == SIG_IGN) {
+ current->signal &= ~_S(signum);
+ return;
+ }
+ if (p->sa_handler == SIG_DFL) {
+ if (signum != SIGCONT && signum != SIGCHLD && signum != SIGWINCH)
+ return;
+ current->signal &= ~_S(signum);
+ return;
+ }
+}
+
+asmlinkage int irix_sigaction(int sig, struct sigact_irix5 *new,
+ struct sigact_irix5 *old, unsigned long trampoline)
+{
+ struct sigaction new_sa, *p;
+
+#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(sig < 1 || sig > 32)
+ return -EINVAL;
+ p = sig - 1 + current->sig->action;
+
+ if(new) {
+ int err = verify_area(VERIFY_READ, new, sizeof(*new));
+ if(err)
+ return err;
+ if(sig == SIGKILL || sig == SIGSTOP)
+ return -EINVAL;
+ new_sa.sa_flags = new->flags;
+ new_sa.sa_handler = (__sighandler_t) new->handler;
+ new_sa.sa_mask.__sigbits[1] = new_sa.sa_mask.__sigbits[2] =
+ new_sa.sa_mask.__sigbits[3] = 0;
+ new_sa.sa_mask.__sigbits[0] = new->sigset[0];
+
+ if(new_sa.sa_handler != SIG_DFL && new_sa.sa_handler != SIG_IGN) {
+ err = verify_area(VERIFY_READ, new_sa.sa_handler, 1);
+ 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...
+ */
+ current->tss.irix_trampoline = trampoline;
+ if(old) {
+ int err = verify_area(VERIFY_WRITE, old, sizeof(*old));
+ if(err)
+ return err;
+ old->flags = p->sa_flags;
+ old->handler = (void *) p->sa_handler;
+ old->sigset[1] = old->sigset[2] = old->sigset[3] = 0;
+ old->sigset[0] = p->sa_mask.__sigbits[0];
+ old->_unused0[0] = old->_unused0[1] = 0;
+ }
+
+ if(new) {
+ *p = new_sa;
+ check_pending(sig);
+ }
+
+ return 0;
+}
+
+asmlinkage int irix_sigpending(unsigned long *set)
+{
+ int err;
+
+ err = verify_area(VERIFY_WRITE, set, (sizeof(unsigned long) * 4));
+ if(!err) {
+ set[1] = set[2] = set[3] = 0;
+ set[0] = (current->blocked & current->signal);
+ }
+ return err;
+}
+
+asmlinkage int irix_sigprocmask(int how, unsigned long *new, unsigned long *old)
+{
+ unsigned long bits, oldbits = current->blocked;
+ int error;
+
+ if(new) {
+ error = verify_area(VERIFY_READ, new, (sizeof(unsigned long) * 4));
+ if(error)
+ return error;
+ bits = new[0] & _BLOCKABLE;
+ switch(how) {
+ case 1:
+ current->blocked |= bits;
+ break;
+
+ case 2:
+ current->blocked &= ~bits;
+ break;
+
+ case 3:
+ case 256:
+ current->blocked = bits;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+ }
+ if(old) {
+ error = verify_area(VERIFY_WRITE, old, (sizeof(unsigned long) * 4));
+ if(error)
+ return error;
+ old[1] = old[2] = old[3] = 0;
+ old[0] = oldbits;
+ }
+ return 0;
+}
+
+asmlinkage int irix_sigsuspend(struct pt_regs *regs)
+{
+ unsigned int mask;
+ unsigned long *uset;
+ int base = 0;
+
+ if(regs->regs[2] == 1000)
+ base = 1;
+
+ mask = current->blocked;
+ uset = (unsigned long *) regs->regs[base + 4];
+ if(verify_area(VERIFY_READ, uset, (sizeof(unsigned long) * 4)))
+ return -EFAULT;
+ current->blocked = uset[0] & _BLOCKABLE;
+ while(1) {
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ if(do_irix_signal(mask, 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)
+{
+ unsigned long mask, kset, expire = 0;
+ int 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;
+ kset = set[0];
+
+ error = verify_area(VERIFY_READ, set, (sizeof(unsigned long) * 4));
+ if(error)
+ return error;
+
+ if(info) {
+ error = verify_area(VERIFY_WRITE, info, sizeof(*info));
+ if(error)
+ return error;
+ memset(info, 0, sizeof(*info));
+ }
+
+ if(tp) {
+ error = verify_area(VERIFY_READ, tp, sizeof(*tp));
+ if(error)
+ return error;
+ if(!tp->tv_sec && !tp->tv_nsec)
+ return -EINVAL;
+ expire = timespectojiffies(tp)+(tp->tv_sec||tp->tv_nsec)+jiffies;
+ current->timeout = expire;
+ }
+
+ while(1) {
+ current->state = TASK_INTERRUPTIBLE; schedule();
+ if(current->signal & kset) break;
+ if(tp && expire <= jiffies) {
+ timeo = 1;
+ break;
+ }
+ if(current->signal & ~(current->blocked)) return -EINTR;
+ }
+
+ if(timeo) return -EAGAIN;
+ for(sig = 1, mask = 2; mask; mask <<= 1, sig++) {
+ if(!(mask & kset)) continue;
+ if(mask & current->signal) {
+ /* XXX need more than this... */
+ if(info) info->sig = sig;
+ return 0;
+ }
+ }
+
+ /* Should not get here, but do something sane if we do. */
+ return -EINTR;
+}
+
+/* This is here because of irix5_siginfo definition. */
+#define P_PID 0
+#define P_PGID 2
+#define P_ALL 7
+
+extern int getrusage(struct task_struct *, int, struct rusage *);
+extern void release(struct task_struct * p);
+
+#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;
+ struct wait_queue wait = { current, NULL };
+ struct task_struct *p;
+
+ if(!info)
+ return -EINVAL;
+ flag = verify_area(VERIFY_WRITE, info, sizeof(*info));
+ if(flag)
+ return flag;
+ if(ru) {
+ flag = verify_area(VERIFY_WRITE, ru, sizeof(*ru));
+ if(flag)
+ return flag;
+ }
+ if(options & ~(W_MASK))
+ return -EINVAL;
+ if(type != P_PID && type != P_PGID && type != P_ALL)
+ return -EINVAL;
+ add_wait_queue(&current->wait_chldexit, &wait);
+repeat:
+ flag = 0;
+ for(p = current->p_cptr; p; p = p->p_osptr) {
+ if((type == P_PID) && p->pid != pid)
+ continue;
+ if((type == P_PGID) && p->pgrp != 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->flags & PF_PTRACED))
+ continue;
+ if (ru != NULL)
+ getrusage(p, RUSAGE_BOTH, ru);
+ info->sig = SIGCHLD;
+ info->code = 0;
+ info->stuff.procinfo.pid = p->pid;
+ info->stuff.procinfo.procdata.child.status =
+ (p->exit_code >> 8) & 0xff;
+ info->stuff.procinfo.procdata.child.utime =
+ p->utime;
+ info->stuff.procinfo.procdata.child.stime =
+ p->stime;
+ p->exit_code = 0;
+ retval = 0;
+ goto end_waitsys;
+ case TASK_ZOMBIE:
+ current->cutime += p->utime + p->cutime;
+ current->cstime += p->stime + p->cstime;
+ if (ru != NULL)
+ getrusage(p, RUSAGE_BOTH, ru);
+ info->sig = SIGCHLD;
+ info->code = 1; /* CLD_EXITED */
+ info->stuff.procinfo.pid = p->pid;
+ info->stuff.procinfo.procdata.child.status =
+ (p->exit_code >> 8) & 0xff;
+ info->stuff.procinfo.procdata.child.utime =
+ p->utime;
+ info->stuff.procinfo.procdata.child.stime =
+ p->stime;
+ retval = 0;
+ if (p->p_opptr != p->p_pptr) {
+ REMOVE_LINKS(p);
+ p->p_pptr = p->p_opptr;
+ SET_LINKS(p);
+ notify_parent(p);
+ } else
+ release(p);
+ goto end_waitsys;
+ default:
+ continue;
+ }
+ }
+ if(flag) {
+ retval = 0;
+ if(options & W_NOHANG)
+ goto end_waitsys;
+ retval = -ERESTARTSYS;
+ if(current->signal & ~current->blocked)
+ goto end_waitsys;
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ goto repeat;
+ }
+ retval = -ECHILD;
+end_waitsys:
+ remove_wait_queue(&current->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 *ctx;
+
+ 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
+
+ error = verify_area(VERIFY_WRITE, ctx, sizeof(*ctx));
+ if(error)
+ return error;
+ ctx->flags = 0x0f;
+ ctx->link = current->tss.irix_oldctx;
+ ctx->sigmask[1] = ctx->sigmask[2] = ctx->sigmask[4] = 0;
+ ctx->sigmask[0] = current->blocked;
+
+ /* XXX Do sigstack stuff someday... */
+ ctx->stack.sp = ctx->stack.size = ctx->stack.flags = 0;
+
+ ctx->weird_graphics_thing = 0;
+ ctx->regs[0] = 0;
+ for(i = 1; i < 32; i++)
+ ctx->regs[i] = regs->regs[i];
+ ctx->regs[32] = regs->lo;
+ ctx->regs[33] = regs->hi;
+ ctx->regs[34] = regs->cp0_cause;
+ ctx->regs[35] = regs->cp0_epc;
+ if(!current->used_math) {
+ ctx->flags &= ~(0x08);
+ } else {
+ /* XXX wheee... */
+ printk("Wheee, no code for saving IRIX FPU context yet.\n");
+ }
+ 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
+
+ error = verify_area(VERIFY_READ, ctx, sizeof(*ctx));
+ if(error)
+ return error;
+
+ 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->tss.irix_oldctx = ctx->link;
+ return regs->regs[2];
+}
+
+struct irix_sigstack { unsigned long sp; int status; };
+
+asmlinkage int irix_sigstack(struct irix_sigstack *new, struct irix_sigstack *old)
+{
+ int error;
+
+#ifdef DEBUG_SIG
+ printk("[%s:%d] irix_sigstack(%p,%p)\n",
+ current->comm, current->pid, new, old);
+#endif
+ if(new) {
+ error = verify_area(VERIFY_READ, new, sizeof(*new));
+ if(error)
+ return error;
+ }
+
+ if(old) {
+ error = verify_area(VERIFY_WRITE, old, sizeof(*old));
+ if(error)
+ return error;
+ }
+ return 0;
+}
+
+struct irix_sigaltstack { unsigned long sp; int size; int status; };
+
+asmlinkage int irix_sigaltstack(struct irix_sigaltstack *new,
+ struct irix_sigaltstack *old)
+{
+ int error;
+
+#ifdef DEBUG_SIG
+ printk("[%s:%d] irix_sigaltstack(%p,%p)\n",
+ current->comm, current->pid, new, old);
+#endif
+ if(new) {
+ error = verify_area(VERIFY_READ, new, sizeof(*new));
+ if(error)
+ return error;
+ }
+
+ if(old) {
+ error = verify_area(VERIFY_WRITE, old, sizeof(*old));
+ if(error)
+ return error;
+ }
+ return 0;
+}
+
+struct irix_procset {
+ int cmd, ltype, lid, rtype, rid;
+};
+
+asmlinkage int irix_sigsendset(struct irix_procset *pset, int sig)
+{
+ int error;
+
+ error = verify_area(VERIFY_READ, pset, sizeof(*pset));
+#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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 08:42:45 +0000