Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/sparc/kernel/signal.c b/arch/sparc/kernel/signal.c
new file mode 100644
index 0000000..011ff35
--- /dev/null
+++ b/arch/sparc/kernel/signal.c
@@ -0,0 +1,1181 @@
+/* $Id: signal.c,v 1.110 2002/02/08 03:57:14 davem Exp $
+ * linux/arch/sparc/kernel/signal.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
+ * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
+ */
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/wait.h>
+#include <linux/ptrace.h>
+#include <linux/unistd.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/binfmts.h> /* do_coredum */
+#include <linux/bitops.h>
+
+#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 */
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+extern void fpsave(unsigned long *fpregs, unsigned long *fsr,
+ void *fpqueue, unsigned long *fpqdepth);
+extern void fpload(unsigned long *fpregs, unsigned long *fsr);
+
+asmlinkage int do_signal(sigset_t *oldset, struct pt_regs * regs,
+ unsigned long orig_o0, int restart_syscall);
+
+/* Signal frames: the original one (compatible with SunOS):
+ *
+ * Set up a signal frame... Make the stack look the way SunOS
+ * expects it to look which is basically:
+ *
+ * ---------------------------------- <-- %sp at signal time
+ * Struct sigcontext
+ * Signal address
+ * Ptr to sigcontext area above
+ * Signal code
+ * The signal number itself
+ * One register window
+ * ---------------------------------- <-- New %sp
+ */
+struct signal_sframe {
+ struct reg_window sig_window;
+ int sig_num;
+ int sig_code;
+ struct sigcontext __user *sig_scptr;
+ int sig_address;
+ struct sigcontext sig_context;
+ unsigned int extramask[_NSIG_WORDS - 1];
+};
+
+/*
+ * And the new one, intended to be used for Linux applications only
+ * (we have enough in there to work with clone).
+ * All the interesting bits are in the info field.
+ */
+
+struct new_signal_frame {
+ struct sparc_stackf ss;
+ __siginfo_t info;
+ __siginfo_fpu_t __user *fpu_save;
+ unsigned long insns[2] __attribute__ ((aligned (8)));
+ unsigned int extramask[_NSIG_WORDS - 1];
+ unsigned int extra_size; /* Should be 0 */
+ __siginfo_fpu_t fpu_state;
+};
+
+struct rt_signal_frame {
+ struct sparc_stackf ss;
+ siginfo_t info;
+ struct pt_regs regs;
+ sigset_t mask;
+ __siginfo_fpu_t __user *fpu_save;
+ unsigned int insns[2];
+ stack_t stack;
+ unsigned int extra_size; /* Should be 0 */
+ __siginfo_fpu_t fpu_state;
+};
+
+/* Align macros */
+#define SF_ALIGNEDSZ (((sizeof(struct signal_sframe) + 7) & (~7)))
+#define NF_ALIGNEDSZ (((sizeof(struct new_signal_frame) + 7) & (~7)))
+#define RT_ALIGNEDSZ (((sizeof(struct rt_signal_frame) + 7) & (~7)))
+
+/*
+ * atomically swap in the new signal mask, and wait for a signal.
+ * This is really tricky on the Sparc, watch out...
+ */
+asmlinkage void _sigpause_common(old_sigset_t set, struct pt_regs *regs)
+{
+ sigset_t saveset;
+
+ set &= _BLOCKABLE;
+ spin_lock_irq(¤t->sighand->siglock);
+ saveset = current->blocked;
+ siginitset(¤t->blocked, set);
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+
+ regs->pc = regs->npc;
+ regs->npc += 4;
+
+ /* Condition codes and return value where set here for sigpause,
+ * and so got used by setup_frame, which again causes sigreturn()
+ * to return -EINTR.
+ */
+ while (1) {
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ /*
+ * Return -EINTR and set condition code here,
+ * so the interrupted system call actually returns
+ * these.
+ */
+ regs->psr |= PSR_C;
+ regs->u_regs[UREG_I0] = EINTR;
+ if (do_signal(&saveset, regs, 0, 0))
+ return;
+ }
+}
+
+asmlinkage void do_sigpause(unsigned int set, struct pt_regs *regs)
+{
+ _sigpause_common(set, regs);
+}
+
+asmlinkage void do_sigsuspend (struct pt_regs *regs)
+{
+ _sigpause_common(regs->u_regs[UREG_I0], regs);
+}
+
+asmlinkage void do_rt_sigsuspend(sigset_t __user *uset, size_t sigsetsize,
+ struct pt_regs *regs)
+{
+ sigset_t oldset, set;
+
+ /* XXX: Don't preclude handling different sized sigset_t's. */
+ if (sigsetsize != sizeof(sigset_t)) {
+ regs->psr |= PSR_C;
+ regs->u_regs[UREG_I0] = EINVAL;
+ return;
+ }
+
+ if (copy_from_user(&set, uset, sizeof(set))) {
+ regs->psr |= PSR_C;
+ regs->u_regs[UREG_I0] = EFAULT;
+ return;
+ }
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(¤t->sighand->siglock);
+ oldset = current->blocked;
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+
+ regs->pc = regs->npc;
+ regs->npc += 4;
+
+ /* Condition codes and return value where set here for sigpause,
+ * and so got used by setup_frame, which again causes sigreturn()
+ * to return -EINTR.
+ */
+ while (1) {
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ /*
+ * Return -EINTR and set condition code here,
+ * so the interrupted system call actually returns
+ * these.
+ */
+ regs->psr |= PSR_C;
+ regs->u_regs[UREG_I0] = EINTR;
+ if (do_signal(&oldset, regs, 0, 0))
+ return;
+ }
+}
+
+static inline int
+restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
+{
+ int err;
+#ifdef CONFIG_SMP
+ if (test_tsk_thread_flag(current, TIF_USEDFPU))
+ regs->psr &= ~PSR_EF;
+#else
+ if (current == last_task_used_math) {
+ last_task_used_math = NULL;
+ regs->psr &= ~PSR_EF;
+ }
+#endif
+ set_used_math();
+ clear_tsk_thread_flag(current, TIF_USEDFPU);
+
+ if (!access_ok(VERIFY_READ, fpu, sizeof(*fpu)))
+ return -EFAULT;
+
+ err = __copy_from_user(¤t->thread.float_regs[0], &fpu->si_float_regs[0],
+ (sizeof(unsigned long) * 32));
+ err |= __get_user(current->thread.fsr, &fpu->si_fsr);
+ err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
+ if (current->thread.fpqdepth != 0)
+ err |= __copy_from_user(¤t->thread.fpqueue[0],
+ &fpu->si_fpqueue[0],
+ ((sizeof(unsigned long) +
+ (sizeof(unsigned long *)))*16));
+ return err;
+}
+
+static inline void do_new_sigreturn (struct pt_regs *regs)
+{
+ struct new_signal_frame __user *sf;
+ unsigned long up_psr, pc, npc;
+ sigset_t set;
+ __siginfo_fpu_t __user *fpu_save;
+ int err;
+
+ sf = (struct new_signal_frame __user *) regs->u_regs[UREG_FP];
+
+ /* 1. Make sure we are not getting garbage from the user */
+ if (!access_ok(VERIFY_READ, sf, sizeof(*sf)))
+ goto segv_and_exit;
+
+ if (((unsigned long) sf) & 3)
+ goto segv_and_exit;
+
+ err = __get_user(pc, &sf->info.si_regs.pc);
+ err |= __get_user(npc, &sf->info.si_regs.npc);
+
+ if ((pc | npc) & 3)
+ goto segv_and_exit;
+
+ /* 2. Restore the state */
+ up_psr = regs->psr;
+ err |= __copy_from_user(regs, &sf->info.si_regs, sizeof(struct pt_regs));
+
+ /* User can only change condition codes and FPU enabling in %psr. */
+ regs->psr = (up_psr & ~(PSR_ICC | PSR_EF))
+ | (regs->psr & (PSR_ICC | PSR_EF));
+
+ err |= __get_user(fpu_save, &sf->fpu_save);
+
+ if (fpu_save)
+ err |= restore_fpu_state(regs, fpu_save);
+
+ /* This is pretty much atomic, no amount locking would prevent
+ * the races which exist anyways.
+ */
+ err |= __get_user(set.sig[0], &sf->info.si_mask);
+ err |= __copy_from_user(&set.sig[1], &sf->extramask,
+ (_NSIG_WORDS-1) * sizeof(unsigned int));
+
+ if (err)
+ goto segv_and_exit;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(¤t->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+ return;
+
+segv_and_exit:
+ force_sig(SIGSEGV, current);
+}
+
+asmlinkage void do_sigreturn(struct pt_regs *regs)
+{
+ struct sigcontext __user *scptr;
+ unsigned long pc, npc, psr;
+ sigset_t set;
+ int err;
+
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
+ synchronize_user_stack();
+
+ if (current->thread.new_signal) {
+ do_new_sigreturn(regs);
+ return;
+ }
+
+ scptr = (struct sigcontext __user *) regs->u_regs[UREG_I0];
+
+ /* Check sanity of the user arg. */
+ if (!access_ok(VERIFY_READ, scptr, sizeof(struct sigcontext)) ||
+ (((unsigned long) scptr) & 3))
+ goto segv_and_exit;
+
+ err = __get_user(pc, &scptr->sigc_pc);
+ err |= __get_user(npc, &scptr->sigc_npc);
+
+ if ((pc | npc) & 3)
+ goto segv_and_exit;
+
+ /* This is pretty much atomic, no amount locking would prevent
+ * the races which exist anyways.
+ */
+ err |= __get_user(set.sig[0], &scptr->sigc_mask);
+ /* Note that scptr + 1 points to extramask */
+ err |= __copy_from_user(&set.sig[1], scptr + 1,
+ (_NSIG_WORDS - 1) * sizeof(unsigned int));
+
+ if (err)
+ goto segv_and_exit;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(¤t->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+
+ regs->pc = pc;
+ regs->npc = npc;
+
+ err = __get_user(regs->u_regs[UREG_FP], &scptr->sigc_sp);
+ err |= __get_user(regs->u_regs[UREG_I0], &scptr->sigc_o0);
+ err |= __get_user(regs->u_regs[UREG_G1], &scptr->sigc_g1);
+
+ /* User can only change condition codes in %psr. */
+ err |= __get_user(psr, &scptr->sigc_psr);
+ if (err)
+ goto segv_and_exit;
+
+ regs->psr &= ~(PSR_ICC);
+ regs->psr |= (psr & PSR_ICC);
+ return;
+
+segv_and_exit:
+ force_sig(SIGSEGV, current);
+}
+
+asmlinkage void do_rt_sigreturn(struct pt_regs *regs)
+{
+ struct rt_signal_frame __user *sf;
+ unsigned int psr, pc, npc;
+ __siginfo_fpu_t __user *fpu_save;
+ mm_segment_t old_fs;
+ sigset_t set;
+ stack_t st;
+ int err;
+
+ synchronize_user_stack();
+ sf = (struct rt_signal_frame __user *) regs->u_regs[UREG_FP];
+ if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) ||
+ (((unsigned long) sf) & 0x03))
+ goto segv;
+
+ err = __get_user(pc, &sf->regs.pc);
+ err |= __get_user(npc, &sf->regs.npc);
+ err |= ((pc | npc) & 0x03);
+
+ err |= __get_user(regs->y, &sf->regs.y);
+ err |= __get_user(psr, &sf->regs.psr);
+
+ err |= __copy_from_user(®s->u_regs[UREG_G1],
+ &sf->regs.u_regs[UREG_G1], 15 * sizeof(u32));
+
+ regs->psr = (regs->psr & ~PSR_ICC) | (psr & PSR_ICC);
+
+ err |= __get_user(fpu_save, &sf->fpu_save);
+
+ if (fpu_save)
+ err |= restore_fpu_state(regs, fpu_save);
+ err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
+
+ err |= __copy_from_user(&st, &sf->stack, sizeof(stack_t));
+
+ if (err)
+ goto segv;
+
+ regs->pc = pc;
+ regs->npc = npc;
+
+ /* 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, (unsigned long)sf);
+ set_fs(old_fs);
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(¤t->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+ return;
+segv:
+ force_sig(SIGSEGV, current);
+}
+
+/* Checks if the fp is valid */
+static inline int invalid_frame_pointer(void __user *fp, int fplen)
+{
+ if ((((unsigned long) fp) & 7) ||
+ !__access_ok((unsigned long)fp, fplen) ||
+ ((sparc_cpu_model == sun4 || sparc_cpu_model == sun4c) &&
+ ((unsigned long) fp < 0xe0000000 && (unsigned long) fp >= 0x20000000)))
+ return 1;
+
+ return 0;
+}
+
+static inline void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize)
+{
+ unsigned long sp;
+
+ sp = regs->u_regs[UREG_FP];
+
+ /* This is the X/Open sanctioned signal stack switching. */
+ if (sa->sa_flags & SA_ONSTACK) {
+ if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7))
+ sp = current->sas_ss_sp + current->sas_ss_size;
+ }
+ return (void __user *)(sp - framesize);
+}
+
+static inline void
+setup_frame(struct sigaction *sa, struct pt_regs *regs, int signr, sigset_t *oldset, siginfo_t *info)
+{
+ struct signal_sframe __user *sframep;
+ struct sigcontext __user *sc;
+ int window = 0, err;
+ unsigned long pc = regs->pc;
+ unsigned long npc = regs->npc;
+ struct thread_info *tp = current_thread_info();
+ void __user *sig_address;
+ int sig_code;
+
+ synchronize_user_stack();
+ sframep = (struct signal_sframe __user *)
+ get_sigframe(sa, regs, SF_ALIGNEDSZ);
+ if (invalid_frame_pointer(sframep, sizeof(*sframep))){
+ /* Don't change signal code and address, so that
+ * post mortem debuggers can have a look.
+ */
+ goto sigill_and_return;
+ }
+
+ sc = &sframep->sig_context;
+
+ /* We've already made sure frame pointer isn't in kernel space... */
+ err = __put_user((sas_ss_flags(regs->u_regs[UREG_FP]) == SS_ONSTACK),
+ &sc->sigc_onstack);
+ err |= __put_user(oldset->sig[0], &sc->sigc_mask);
+ err |= __copy_to_user(sframep->extramask, &oldset->sig[1],
+ (_NSIG_WORDS - 1) * sizeof(unsigned int));
+ err |= __put_user(regs->u_regs[UREG_FP], &sc->sigc_sp);
+ err |= __put_user(pc, &sc->sigc_pc);
+ err |= __put_user(npc, &sc->sigc_npc);
+ err |= __put_user(regs->psr, &sc->sigc_psr);
+ err |= __put_user(regs->u_regs[UREG_G1], &sc->sigc_g1);
+ err |= __put_user(regs->u_regs[UREG_I0], &sc->sigc_o0);
+ err |= __put_user(tp->w_saved, &sc->sigc_oswins);
+ if (tp->w_saved)
+ for (window = 0; window < tp->w_saved; window++) {
+ put_user((char *)tp->rwbuf_stkptrs[window],
+ &sc->sigc_spbuf[window]);
+ err |= __copy_to_user(&sc->sigc_wbuf[window],
+ &tp->reg_window[window],
+ sizeof(struct reg_window));
+ }
+ else
+ err |= __copy_to_user(sframep, (char *) regs->u_regs[UREG_FP],
+ sizeof(struct reg_window));
+
+ tp->w_saved = 0; /* So process is allowed to execute. */
+
+ err |= __put_user(signr, &sframep->sig_num);
+ sig_address = NULL;
+ sig_code = 0;
+ if (SI_FROMKERNEL (info) && (info->si_code & __SI_MASK) == __SI_FAULT) {
+ sig_address = info->si_addr;
+ switch (signr) {
+ case SIGSEGV:
+ switch (info->si_code) {
+ case SEGV_MAPERR: sig_code = SUBSIG_NOMAPPING; break;
+ default: sig_code = SUBSIG_PROTECTION; break;
+ }
+ break;
+ case SIGILL:
+ switch (info->si_code) {
+ case ILL_ILLOPC: sig_code = SUBSIG_ILLINST; break;
+ case ILL_PRVOPC: sig_code = SUBSIG_PRIVINST; break;
+ case ILL_ILLTRP: sig_code = SUBSIG_BADTRAP(info->si_trapno); break;
+ default: sig_code = SUBSIG_STACK; break;
+ }
+ break;
+ case SIGFPE:
+ switch (info->si_code) {
+ case FPE_INTDIV: sig_code = SUBSIG_IDIVZERO; break;
+ case FPE_INTOVF: sig_code = SUBSIG_FPINTOVFL; break;
+ case FPE_FLTDIV: sig_code = SUBSIG_FPDIVZERO; break;
+ case FPE_FLTOVF: sig_code = SUBSIG_FPOVFLOW; break;
+ case FPE_FLTUND: sig_code = SUBSIG_FPUNFLOW; break;
+ case FPE_FLTRES: sig_code = SUBSIG_FPINEXACT; break;
+ case FPE_FLTINV: sig_code = SUBSIG_FPOPERROR; break;
+ default: sig_code = SUBSIG_FPERROR; break;
+ }
+ break;
+ case SIGBUS:
+ switch (info->si_code) {
+ case BUS_ADRALN: sig_code = SUBSIG_ALIGNMENT; break;
+ case BUS_ADRERR: sig_code = SUBSIG_MISCERROR; break;
+ default: sig_code = SUBSIG_BUSTIMEOUT; break;
+ }
+ break;
+ case SIGEMT:
+ switch (info->si_code) {
+ case EMT_TAGOVF: sig_code = SUBSIG_TAG; break;
+ }
+ break;
+ case SIGSYS:
+ if (info->si_code == (__SI_FAULT|0x100)) {
+ /* See sys_sunos.c */
+ sig_code = info->si_trapno;
+ break;
+ }
+ default:
+ sig_address = NULL;
+ }
+ }
+ err |= __put_user((unsigned long)sig_address, &sframep->sig_address);
+ err |= __put_user(sig_code, &sframep->sig_code);
+ err |= __put_user(sc, &sframep->sig_scptr);
+ if (err)
+ goto sigsegv;
+
+ regs->u_regs[UREG_FP] = (unsigned long) sframep;
+ regs->pc = (unsigned long) sa->sa_handler;
+ regs->npc = (regs->pc + 4);
+ return;
+
+sigill_and_return:
+ do_exit(SIGILL);
+sigsegv:
+ force_sigsegv(signr, current);
+}
+
+
+static inline int
+save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
+{
+ int err = 0;
+#ifdef CONFIG_SMP
+ if (test_tsk_thread_flag(current, TIF_USEDFPU)) {
+ put_psr(get_psr() | PSR_EF);
+ fpsave(¤t->thread.float_regs[0], ¤t->thread.fsr,
+ ¤t->thread.fpqueue[0], ¤t->thread.fpqdepth);
+ regs->psr &= ~(PSR_EF);
+ clear_tsk_thread_flag(current, TIF_USEDFPU);
+ }
+#else
+ if (current == last_task_used_math) {
+ put_psr(get_psr() | PSR_EF);
+ fpsave(¤t->thread.float_regs[0], ¤t->thread.fsr,
+ ¤t->thread.fpqueue[0], ¤t->thread.fpqdepth);
+ last_task_used_math = NULL;
+ regs->psr &= ~(PSR_EF);
+ }
+#endif
+ err |= __copy_to_user(&fpu->si_float_regs[0],
+ ¤t->thread.float_regs[0],
+ (sizeof(unsigned long) * 32));
+ err |= __put_user(current->thread.fsr, &fpu->si_fsr);
+ err |= __put_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
+ if (current->thread.fpqdepth != 0)
+ err |= __copy_to_user(&fpu->si_fpqueue[0],
+ ¤t->thread.fpqueue[0],
+ ((sizeof(unsigned long) +
+ (sizeof(unsigned long *)))*16));
+ clear_used_math();
+ return err;
+}
+
+static inline void
+new_setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
+ int signo, sigset_t *oldset)
+{
+ struct new_signal_frame __user *sf;
+ int sigframe_size, err;
+
+ /* 1. Make sure everything is clean */
+ synchronize_user_stack();
+
+ sigframe_size = NF_ALIGNEDSZ;
+ if (!used_math())
+ sigframe_size -= sizeof(__siginfo_fpu_t);
+
+ sf = (struct new_signal_frame __user *)
+ get_sigframe(&ka->sa, regs, sigframe_size);
+
+ if (invalid_frame_pointer(sf, sigframe_size))
+ goto sigill_and_return;
+
+ if (current_thread_info()->w_saved != 0)
+ goto sigill_and_return;
+
+ /* 2. Save the current process state */
+ err = __copy_to_user(&sf->info.si_regs, regs, sizeof(struct pt_regs));
+
+ err |= __put_user(0, &sf->extra_size);
+
+ if (used_math()) {
+ err |= save_fpu_state(regs, &sf->fpu_state);
+ err |= __put_user(&sf->fpu_state, &sf->fpu_save);
+ } else {
+ err |= __put_user(0, &sf->fpu_save);
+ }
+
+ err |= __put_user(oldset->sig[0], &sf->info.si_mask);
+ err |= __copy_to_user(sf->extramask, &oldset->sig[1],
+ (_NSIG_WORDS - 1) * sizeof(unsigned int));
+ err |= __copy_to_user(sf, (char *) regs->u_regs[UREG_FP],
+ sizeof(struct reg_window));
+ if (err)
+ goto sigsegv;
+
+ /* 3. signal handler back-trampoline and parameters */
+ regs->u_regs[UREG_FP] = (unsigned long) sf;
+ regs->u_regs[UREG_I0] = signo;
+ regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
+ regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
+
+ /* 4. signal handler */
+ regs->pc = (unsigned long) ka->sa.sa_handler;
+ regs->npc = (regs->pc + 4);
+
+ /* 5. return to kernel instructions */
+ if (ka->ka_restorer)
+ regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
+ else {
+ regs->u_regs[UREG_I7] = (unsigned long)(&(sf->insns[0]) - 2);
+
+ /* mov __NR_sigreturn, %g1 */
+ err |= __put_user(0x821020d8, &sf->insns[0]);
+
+ /* t 0x10 */
+ err |= __put_user(0x91d02010, &sf->insns[1]);
+ if (err)
+ goto sigsegv;
+
+ /* Flush instruction space. */
+ flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
+ }
+ return;
+
+sigill_and_return:
+ do_exit(SIGILL);
+sigsegv:
+ force_sigsegv(signo, current);
+}
+
+static inline void
+new_setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
+ int signo, sigset_t *oldset, siginfo_t *info)
+{
+ struct rt_signal_frame __user *sf;
+ int sigframe_size;
+ unsigned int psr;
+ int err;
+
+ synchronize_user_stack();
+ sigframe_size = RT_ALIGNEDSZ;
+ if (!used_math())
+ sigframe_size -= sizeof(__siginfo_fpu_t);
+ sf = (struct rt_signal_frame __user *)
+ get_sigframe(&ka->sa, regs, sigframe_size);
+ if (invalid_frame_pointer(sf, sigframe_size))
+ goto sigill;
+ if (current_thread_info()->w_saved != 0)
+ goto sigill;
+
+ err = __put_user(regs->pc, &sf->regs.pc);
+ err |= __put_user(regs->npc, &sf->regs.npc);
+ err |= __put_user(regs->y, &sf->regs.y);
+ psr = regs->psr;
+ if (used_math())
+ psr |= PSR_EF;
+ err |= __put_user(psr, &sf->regs.psr);
+ err |= __copy_to_user(&sf->regs.u_regs, regs->u_regs, sizeof(regs->u_regs));
+ err |= __put_user(0, &sf->extra_size);
+
+ if (psr & PSR_EF) {
+ err |= save_fpu_state(regs, &sf->fpu_state);
+ err |= __put_user(&sf->fpu_state, &sf->fpu_save);
+ } else {
+ err |= __put_user(0, &sf->fpu_save);
+ }
+ err |= __copy_to_user(&sf->mask, &oldset->sig[0], sizeof(sigset_t));
+
+ /* Setup sigaltstack */
+ err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
+ err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
+ err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
+
+ err |= __copy_to_user(sf, (char *) regs->u_regs[UREG_FP],
+ sizeof(struct reg_window));
+
+ err |= copy_siginfo_to_user(&sf->info, info);
+
+ if (err)
+ goto sigsegv;
+
+ regs->u_regs[UREG_FP] = (unsigned long) sf;
+ regs->u_regs[UREG_I0] = signo;
+ regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
+ regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
+
+ regs->pc = (unsigned long) ka->sa.sa_handler;
+ regs->npc = (regs->pc + 4);
+
+ if (ka->ka_restorer)
+ regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
+ else {
+ regs->u_regs[UREG_I7] = (unsigned long)(&(sf->insns[0]) - 2);
+
+ /* mov __NR_sigreturn, %g1 */
+ err |= __put_user(0x821020d8, &sf->insns[0]);
+
+ /* t 0x10 */
+ err |= __put_user(0x91d02010, &sf->insns[1]);
+ if (err)
+ goto sigsegv;
+
+ /* Flush instruction space. */
+ flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
+ }
+ return;
+
+sigill:
+ do_exit(SIGILL);
+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], ®s->u_regs[UREG_G1],
+ sizeof(long) * 7);
+ err |= __copy_to_user(&(*gr)[SVR4_O0], ®s->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], ®s->u_regs[UREG_G1],
+ sizeof(uint) * 7);
+ err |= __copy_to_user(&(*gr)[SVR4_O0], ®s->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(¤t->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(¤t->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(®s->u_regs[UREG_G1], &(*gr)[SVR4_G1],
+ sizeof(long) * 7);
+ err |= __copy_from_user(®s->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)
+{
+ 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_NOMASK)) {
+ spin_lock_irq(¤t->sighand->siglock);
+ sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
+ sigaddset(¤t->blocked, signr);
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+ }
+}
+
+static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
+ struct sigaction *sa)
+{
+ switch(regs->u_regs[UREG_I0]) {
+ case ERESTART_RESTARTBLOCK:
+ case ERESTARTNOHAND:
+ no_system_call_restart:
+ regs->u_regs[UREG_I0] = EINTR;
+ regs->psr |= PSR_C;
+ break;
+ case ERESTARTSYS:
+ if (!(sa->sa_flags & SA_RESTART))
+ goto no_system_call_restart;
+ /* fallthrough */
+ case ERESTARTNOINTR:
+ regs->u_regs[UREG_I0] = orig_i0;
+ regs->pc -= 4;
+ regs->npc -= 4;
+ }
+}
+
+/* Note that 'init' is a special process: it doesn't get signals it doesn't
+ * want to handle. Thus you cannot kill init even with a SIGKILL even by
+ * mistake.
+ */
+asmlinkage int do_signal(sigset_t *oldset, struct pt_regs * regs,
+ unsigned long orig_i0, int restart_syscall)
+{
+ siginfo_t info;
+ struct sparc_deliver_cookie cookie;
+ struct k_sigaction ka;
+ int signr;
+
+ /*
+ * 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;
+
+ if (!oldset)
+ oldset = ¤t->blocked;
+
+ signr = get_signal_to_deliver(&info, &ka, regs, &cookie);
+ if (signr > 0) {
+ if (cookie.restart_syscall)
+ syscall_restart(cookie.orig_i0, regs, &ka.sa);
+ handle_signal(signr, &ka, &info, oldset,
+ regs, svr4_signal);
+ return 1;
+ }
+ if (cookie.restart_syscall &&
+ (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
+ regs->u_regs[UREG_I0] == ERESTARTSYS ||
+ regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
+ /* replay the system call when we are done */
+ regs->u_regs[UREG_I0] = cookie.orig_i0;
+ regs->pc -= 4;
+ regs->npc -= 4;
+ }
+ if (cookie.restart_syscall &&
+ regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
+ regs->u_regs[UREG_G1] = __NR_restart_syscall;
+ regs->pc -= 4;
+ regs->npc -= 4;
+ }
+ return 0;
+}
+
+asmlinkage int
+do_sys_sigstack(struct sigstack __user *ssptr, struct sigstack __user *ossptr,
+ unsigned long sp)
+{
+ int ret = -EFAULT;
+
+ /* First see if old state is wanted. */
+ if (ossptr) {
+ if (put_user(current->sas_ss_sp + current->sas_ss_size,
+ &ossptr->the_stack) ||
+ __put_user(on_sig_stack(sp), &ossptr->cur_status))
+ goto out;
+ }
+
+ /* Now see if we want to update the new state. */
+ if (ssptr) {
+ char *ss_sp;
+
+ if (get_user(ss_sp, &ssptr->the_stack))
+ goto out;
+ /* If the current stack was set with sigaltstack, don't
+ swap stacks while we are on it. */
+ ret = -EPERM;
+ if (current->sas_ss_sp && on_sig_stack(sp))
+ goto out;
+
+ /* Since we don't know the extent of the stack, and we don't
+ track onstack-ness, but rather calculate it, we must
+ presume a size. Ho hum this interface is lossy. */
+ current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
+ current->sas_ss_size = SIGSTKSZ;
+ }
+ ret = 0;
+out:
+ return ret;
+}
+
+void ptrace_signal_deliver(struct pt_regs *regs, void *cookie)
+{
+ struct sparc_deliver_cookie *cp = cookie;
+
+ if (cp->restart_syscall &&
+ (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
+ regs->u_regs[UREG_I0] == ERESTARTSYS ||
+ regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
+ /* replay the system call when we are done */
+ regs->u_regs[UREG_I0] = cp->orig_i0;
+ regs->pc -= 4;
+ regs->npc -= 4;
+ cp->restart_syscall = 0;
+ }
+
+ if (cp->restart_syscall &&
+ regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
+ regs->u_regs[UREG_G1] = __NR_restart_syscall;
+ regs->pc -= 4;
+ regs->npc -= 4;
+ cp->restart_syscall = 0;
+ }
+}