1 files changed, 10 insertions, 297 deletions

diff --git a/arch/sparc/kernel/signal.c b/arch/sparc/kernel/signal.c
index 9994cac95078..1f730619a24a 100644
--- a/arch/sparc/kernel/signal.c
+++ b/arch/sparc/kernel/signal.c
@@ -22,7 +22,6 @@
 
 #include <asm/uaccess.h>
 #include <asm/ptrace.h>
-#include <asm/svr4.h>
 #include <asm/pgalloc.h>
 #include <asm/pgtable.h>
 #include <asm/cacheflush.h>     /* flush_sig_insns */
@@ -454,7 +453,6 @@ setup_frame(struct sigaction *sa, struct pt_regs *regs, int signr, sigset_t *old
                         break;
                 case SIGSYS:
                         if (info->si_code == (__SI_FAULT|0x100)) {
-                                /* See sys_sunos.c */
                                 sig_code = info->si_trapno;
                                 break;
                         }
@@ -676,291 +674,17 @@ sigsegv:
         force_sigsegv(signo, current);
 }
 
-/* Setup a Solaris stack frame */
-static inline void
-setup_svr4_frame(struct sigaction *sa, unsigned long pc, unsigned long npc,
-                 struct pt_regs *regs, int signr, sigset_t *oldset)
-{
-        svr4_signal_frame_t __user *sfp;
-        svr4_gregset_t  __user *gr;
-        svr4_siginfo_t  __user *si;
-        svr4_mcontext_t __user *mc;
-        svr4_gwindows_t __user *gw;
-        svr4_ucontext_t __user *uc;
-        svr4_sigset_t   setv;
-        struct thread_info *tp = current_thread_info();
-        int window = 0, err;
-
-        synchronize_user_stack();
-        sfp = (svr4_signal_frame_t __user *)
-                get_sigframe(sa, regs, SVR4_SF_ALIGNED + sizeof(struct reg_window));
-
-        if (invalid_frame_pointer(sfp, sizeof(*sfp)))
-                goto sigill_and_return;
-
-        /* Start with a clean frame pointer and fill it */
-        err = __clear_user(sfp, sizeof(*sfp));
-
-        /* Setup convenience variables */
-        si = &sfp->si;
-        uc = &sfp->uc;
-        gw = &sfp->gw;
-        mc = &uc->mcontext;
-        gr = &mc->greg;
-        
-        /* FIXME: where am I supposed to put this?
-         * sc->sigc_onstack = old_status;
-         * anyways, it does not look like it is used for anything at all.
-         */
-        setv.sigbits[0] = oldset->sig[0];
-        setv.sigbits[1] = oldset->sig[1];
-        if (_NSIG_WORDS >= 4) {
-                setv.sigbits[2] = oldset->sig[2];
-                setv.sigbits[3] = oldset->sig[3];
-                err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t));
-        } else
-                err |= __copy_to_user(&uc->sigmask, &setv,
-                                      2 * sizeof(unsigned int));
-
-        /* Store registers */
-        err |= __put_user(regs->pc, &((*gr)[SVR4_PC]));
-        err |= __put_user(regs->npc, &((*gr)[SVR4_NPC]));
-        err |= __put_user(regs->psr, &((*gr)[SVR4_PSR]));
-        err |= __put_user(regs->y, &((*gr)[SVR4_Y]));
-        
-        /* Copy g[1..7] and o[0..7] registers */
-        err |= __copy_to_user(&(*gr)[SVR4_G1], &regs->u_regs[UREG_G1],
-                              sizeof(long) * 7);
-        err |= __copy_to_user(&(*gr)[SVR4_O0], &regs->u_regs[UREG_I0],
-                              sizeof(long) * 8);
-
-        /* Setup sigaltstack */
-        err |= __put_user(current->sas_ss_sp, &uc->stack.sp);
-        err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags);
-        err |= __put_user(current->sas_ss_size, &uc->stack.size);
-
-        /* Save the currently window file: */
-
-        /* 1. Link sfp->uc->gwins to our windows */
-        err |= __put_user(gw, &mc->gwin);
-            
-        /* 2. Number of windows to restore at setcontext(): */
-        err |= __put_user(tp->w_saved, &gw->count);
-
-        /* 3. Save each valid window
-         *    Currently, it makes a copy of the windows from the kernel copy.
-         *    David's code for SunOS, makes the copy but keeps the pointer to
-         *    the kernel.  My version makes the pointer point to a userland 
-         *    copy of those.  Mhm, I wonder if I shouldn't just ignore those
-         *    on setcontext and use those that are on the kernel, the signal
-         *    handler should not be modyfing those, mhm.
-         *
-         *    These windows are just used in case synchronize_user_stack failed
-         *    to flush the user windows.
-         */
-        for (window = 0; window < tp->w_saved; window++) {
-                err |= __put_user((int __user *) &(gw->win[window]), &gw->winptr[window]);
-                err |= __copy_to_user(&gw->win[window],
-                                      &tp->reg_window[window],
-                                      sizeof(svr4_rwindow_t));
-                err |= __put_user(0, gw->winptr[window]);
-        }
-
-        /* 4. We just pay attention to the gw->count field on setcontext */
-        tp->w_saved = 0; /* So process is allowed to execute. */
-
-        /* Setup the signal information.  Solaris expects a bunch of
-         * information to be passed to the signal handler, we don't provide
-         * that much currently, should use siginfo.
-         */
-        err |= __put_user(signr, &si->siginfo.signo);
-        err |= __put_user(SVR4_SINOINFO, &si->siginfo.code);
-        if (err)
-                goto sigsegv;
-
-        regs->u_regs[UREG_FP] = (unsigned long) sfp;
-        regs->pc = (unsigned long) sa->sa_handler;
-        regs->npc = (regs->pc + 4);
-
-        /* Arguments passed to signal handler */
-        if (regs->u_regs[14]){
-                struct reg_window __user *rw = (struct reg_window __user *)
-                        regs->u_regs[14];
-
-                err |= __put_user(signr, &rw->ins[0]);
-                err |= __put_user(si, &rw->ins[1]);
-                err |= __put_user(uc, &rw->ins[2]);
-                err |= __put_user(sfp, &rw->ins[6]);    /* frame pointer */
-                if (err)
-                        goto sigsegv;
-
-                regs->u_regs[UREG_I0] = signr;
-                regs->u_regs[UREG_I1] = (unsigned long) si;
-                regs->u_regs[UREG_I2] = (unsigned long) uc;
-        }
-        return;
-
-sigill_and_return:
-        do_exit(SIGILL);
-sigsegv:
-        force_sigsegv(signr, current);
-}
-
-asmlinkage int svr4_getcontext(svr4_ucontext_t __user *uc, struct pt_regs *regs)
-{
-        svr4_gregset_t  __user *gr;
-        svr4_mcontext_t __user *mc;
-        svr4_sigset_t   setv;
-        int err = 0;
-
-        synchronize_user_stack();
-
-        if (current_thread_info()->w_saved)
-                return -EFAULT;
-
-        err = clear_user(uc, sizeof(*uc));
-        if (err)
-                return -EFAULT;
-
-        /* Setup convenience variables */
-        mc = &uc->mcontext;
-        gr = &mc->greg;
-
-        setv.sigbits[0] = current->blocked.sig[0];
-        setv.sigbits[1] = current->blocked.sig[1];
-        if (_NSIG_WORDS >= 4) {
-                setv.sigbits[2] = current->blocked.sig[2];
-                setv.sigbits[3] = current->blocked.sig[3];
-                err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t));
-        } else
-                err |= __copy_to_user(&uc->sigmask, &setv,
-                                      2 * sizeof(unsigned int));
-
-        /* Store registers */
-        err |= __put_user(regs->pc, &uc->mcontext.greg[SVR4_PC]);
-        err |= __put_user(regs->npc, &uc->mcontext.greg[SVR4_NPC]);
-        err |= __put_user(regs->psr, &uc->mcontext.greg[SVR4_PSR]);
-        err |= __put_user(regs->y, &uc->mcontext.greg[SVR4_Y]);
-        
-        /* Copy g[1..7] and o[0..7] registers */
-        err |= __copy_to_user(&(*gr)[SVR4_G1], &regs->u_regs[UREG_G1],
-                              sizeof(uint) * 7);
-        err |= __copy_to_user(&(*gr)[SVR4_O0], &regs->u_regs[UREG_I0],
-                              sizeof(uint) * 8);
-
-        /* Setup sigaltstack */
-        err |= __put_user(current->sas_ss_sp, &uc->stack.sp);
-        err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags);
-        err |= __put_user(current->sas_ss_size, &uc->stack.size);
-
-        /* The register file is not saved
-         * we have already stuffed all of it with sync_user_stack
-         */
-        return (err ? -EFAULT : 0);
-}
-
-/* Set the context for a svr4 application, this is Solaris way to sigreturn */
-asmlinkage int svr4_setcontext(svr4_ucontext_t __user *c, struct pt_regs *regs)
-{
-        svr4_gregset_t  __user *gr;
-        unsigned long pc, npc, psr;
-        mm_segment_t old_fs;
-        sigset_t set;
-        svr4_sigset_t setv;
-        int err;
-        stack_t st;
-        
-        /* Fixme: restore windows, or is this already taken care of in
-         * svr4_setup_frame when sync_user_windows is done?
-         */
-        flush_user_windows();
-
-        if (current_thread_info()->w_saved)
-                goto sigsegv_and_return;
-
-        if (((unsigned long) c) & 3)
-                goto sigsegv_and_return;
-
-        if (!__access_ok((unsigned long)c, sizeof(*c)))
-                goto sigsegv_and_return;
-
-        /* Check for valid PC and nPC */
-        gr = &c->mcontext.greg;
-        err = __get_user(pc, &((*gr)[SVR4_PC]));
-        err |= __get_user(npc, &((*gr)[SVR4_NPC]));
-
-        if ((pc | npc) & 3)
-                goto sigsegv_and_return;
-
-        /* Retrieve information from passed ucontext */
-        /* note that nPC is ored a 1, this is used to inform entry.S */
-        /* that we don't want it to mess with our PC and nPC */
-
-        /* This is pretty much atomic, no amount locking would prevent
-         * the races which exist anyways.
-         */
-        err |= __copy_from_user(&setv, &c->sigmask, sizeof(svr4_sigset_t));
-        
-        err |= __get_user(st.ss_sp, &c->stack.sp);
-        err |= __get_user(st.ss_flags, &c->stack.flags);
-        err |= __get_user(st.ss_size, &c->stack.size);
-        
-        if (err)
-                goto sigsegv_and_return;
-                
-        /* 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,
-                       regs->u_regs[UREG_I6]);
-        set_fs(old_fs);
-        
-        set.sig[0] = setv.sigbits[0];
-        set.sig[1] = setv.sigbits[1];
-        if (_NSIG_WORDS >= 4) {
-                set.sig[2] = setv.sigbits[2];
-                set.sig[3] = setv.sigbits[3];
-        }
-        sigdelsetmask(&set, ~_BLOCKABLE);
-        spin_lock_irq(&current->sighand->siglock);
-        current->blocked = set;
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
-        regs->pc = pc;
-        regs->npc = npc | 1;
-        err |= __get_user(regs->y, &((*gr)[SVR4_Y]));
-        err |= __get_user(psr, &((*gr)[SVR4_PSR]));
-        regs->psr &= ~(PSR_ICC);
-        regs->psr |= (psr & PSR_ICC);
-
-        /* Restore g[1..7] and o[0..7] registers */
-        err |= __copy_from_user(&regs->u_regs[UREG_G1], &(*gr)[SVR4_G1],
-                              sizeof(long) * 7);
-        err |= __copy_from_user(&regs->u_regs[UREG_I0], &(*gr)[SVR4_O0],
-                              sizeof(long) * 8);
-        return (err ? -EFAULT : 0);
-
-sigsegv_and_return:
-        force_sig(SIGSEGV, current);
-        return -EFAULT;
-}
-
 static inline void
 handle_signal(unsigned long signr, struct k_sigaction *ka,
-              siginfo_t *info, sigset_t *oldset, struct pt_regs *regs,
-              int svr4_signal)
+              siginfo_t *info, sigset_t *oldset, struct pt_regs *regs)
 {
-        if (svr4_signal)
-                setup_svr4_frame(&ka->sa, regs->pc, regs->npc, regs, signr, oldset);
-        else {
-                if (ka->sa.sa_flags & SA_SIGINFO)
-                        new_setup_rt_frame(ka, regs, signr, oldset, info);
-                else if (current->thread.new_signal)
-                        new_setup_frame(ka, regs, signr, oldset);
-                else
-                        setup_frame(&ka->sa, regs, signr, oldset, info);
-        }
+        if (ka->sa.sa_flags & SA_SIGINFO)
+                new_setup_rt_frame(ka, regs, signr, oldset, info);
+        else if (current->thread.new_signal)
+                new_setup_frame(ka, regs, signr, oldset);
+        else
+                setup_frame(&ka->sa, regs, signr, oldset, info);
+
         spin_lock_irq(&current->sighand->siglock);
         sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
         if (!(ka->sa.sa_flags & SA_NOMASK))
@@ -1002,17 +726,6 @@ asmlinkage void do_signal(struct pt_regs * regs, unsigned long orig_i0, int rest
         int signr;
         sigset_t *oldset;
 
-        /*
-         * XXX Disable svr4 signal handling until solaris emulation works.
-         * It is buggy - Anton
-         */
-#define SVR4_SIGNAL_BROKEN 1
-#ifdef SVR4_SIGNAL_BROKEN
-        int svr4_signal = 0;
-#else
-        int svr4_signal = current->personality == PER_SVR4;
-#endif
-
         cookie.restart_syscall = restart_syscall;
         cookie.orig_i0 = orig_i0;
 
@@ -1025,8 +738,8 @@ asmlinkage void do_signal(struct pt_regs * regs, unsigned long orig_i0, int rest
         if (signr > 0) {
                 if (cookie.restart_syscall)
                         syscall_restart(cookie.orig_i0, regs, &ka.sa);
-                handle_signal(signr, &ka, &info, oldset,
-                              regs, svr4_signal);
+                handle_signal(signr, &ka, &info, oldset, regs);
+
                 /* 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