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/sparc64/kernel/signal.c b/arch/sparc64/kernel/signal.c
new file mode 100644
index 0000000..b279346
--- /dev/null
+++ b/arch/sparc64/kernel/signal.c
@@ -0,0 +1,688 @@
+/* $Id: signal.c,v 1.60 2002/02/09 19:49:31 davem Exp $
+ * arch/sparc64/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)
+ * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+#include <linux/config.h>
+#ifdef CONFIG_SPARC32_COMPAT
+#include <linux/compat.h> /* for compat_old_sigset_t */
+#endif
+#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_lock.h>
+#include <linux/binfmts.h>
+#include <linux/bitops.h>
+
+#include <asm/uaccess.h>
+#include <asm/ptrace.h>
+#include <asm/svr4.h>
+#include <asm/pgtable.h>
+#include <asm/fpumacro.h>
+#include <asm/uctx.h>
+#include <asm/siginfo.h>
+#include <asm/visasm.h>
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+static int do_signal(sigset_t *oldset, struct pt_regs * regs,
+ unsigned long orig_o0, int ret_from_syscall);
+
+/* {set, get}context() needed for 64-bit SparcLinux userland. */
+asmlinkage void sparc64_set_context(struct pt_regs *regs)
+{
+ struct ucontext __user *ucp = (struct ucontext __user *)
+ regs->u_regs[UREG_I0];
+ mc_gregset_t __user *grp;
+ unsigned long pc, npc, tstate;
+ unsigned long fp, i7;
+ unsigned char fenab;
+ int err;
+
+ flush_user_windows();
+ if (get_thread_wsaved() ||
+ (((unsigned long)ucp) & (sizeof(unsigned long)-1)) ||
+ (!__access_ok(ucp, sizeof(*ucp))))
+ goto do_sigsegv;
+ grp = &ucp->uc_mcontext.mc_gregs;
+ err = __get_user(pc, &((*grp)[MC_PC]));
+ err |= __get_user(npc, &((*grp)[MC_NPC]));
+ if (err || ((pc | npc) & 3))
+ goto do_sigsegv;
+ if (regs->u_regs[UREG_I1]) {
+ sigset_t set;
+
+ if (_NSIG_WORDS == 1) {
+ if (__get_user(set.sig[0], &ucp->uc_sigmask.sig[0]))
+ goto do_sigsegv;
+ } else {
+ if (__copy_from_user(&set, &ucp->uc_sigmask, sizeof(sigset_t)))
+ goto do_sigsegv;
+ }
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(¤t->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+ }
+ if (test_thread_flag(TIF_32BIT)) {
+ pc &= 0xffffffff;
+ npc &= 0xffffffff;
+ }
+ regs->tpc = pc;
+ regs->tnpc = npc;
+ err |= __get_user(regs->y, &((*grp)[MC_Y]));
+ err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
+ regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
+ regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
+ err |= __get_user(regs->u_regs[UREG_G1], (&(*grp)[MC_G1]));
+ err |= __get_user(regs->u_regs[UREG_G2], (&(*grp)[MC_G2]));
+ err |= __get_user(regs->u_regs[UREG_G3], (&(*grp)[MC_G3]));
+ err |= __get_user(regs->u_regs[UREG_G4], (&(*grp)[MC_G4]));
+ err |= __get_user(regs->u_regs[UREG_G5], (&(*grp)[MC_G5]));
+ err |= __get_user(regs->u_regs[UREG_G6], (&(*grp)[MC_G6]));
+ err |= __get_user(regs->u_regs[UREG_G7], (&(*grp)[MC_G7]));
+ err |= __get_user(regs->u_regs[UREG_I0], (&(*grp)[MC_O0]));
+ err |= __get_user(regs->u_regs[UREG_I1], (&(*grp)[MC_O1]));
+ err |= __get_user(regs->u_regs[UREG_I2], (&(*grp)[MC_O2]));
+ err |= __get_user(regs->u_regs[UREG_I3], (&(*grp)[MC_O3]));
+ err |= __get_user(regs->u_regs[UREG_I4], (&(*grp)[MC_O4]));
+ err |= __get_user(regs->u_regs[UREG_I5], (&(*grp)[MC_O5]));
+ err |= __get_user(regs->u_regs[UREG_I6], (&(*grp)[MC_O6]));
+ err |= __get_user(regs->u_regs[UREG_I7], (&(*grp)[MC_O7]));
+
+ err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp));
+ err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7));
+ err |= __put_user(fp,
+ (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[6])));
+ err |= __put_user(i7,
+ (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[7])));
+
+ err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab));
+ if (fenab) {
+ unsigned long *fpregs = current_thread_info()->fpregs;
+ unsigned long fprs;
+
+ fprs_write(0);
+ err |= __get_user(fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs));
+ if (fprs & FPRS_DL)
+ err |= copy_from_user(fpregs,
+ &(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs),
+ (sizeof(unsigned int) * 32));
+ if (fprs & FPRS_DU)
+ err |= copy_from_user(fpregs+16,
+ ((unsigned long __user *)&(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs))+16,
+ (sizeof(unsigned int) * 32));
+ err |= __get_user(current_thread_info()->xfsr[0],
+ &(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr));
+ err |= __get_user(current_thread_info()->gsr[0],
+ &(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr));
+ regs->tstate &= ~TSTATE_PEF;
+ }
+ if (err)
+ goto do_sigsegv;
+
+ return;
+do_sigsegv:
+ force_sig(SIGSEGV, current);
+}
+
+asmlinkage void sparc64_get_context(struct pt_regs *regs)
+{
+ struct ucontext __user *ucp = (struct ucontext __user *)
+ regs->u_regs[UREG_I0];
+ mc_gregset_t __user *grp;
+ mcontext_t __user *mcp;
+ unsigned long fp, i7;
+ unsigned char fenab;
+ int err;
+
+ synchronize_user_stack();
+ if (get_thread_wsaved() || clear_user(ucp, sizeof(*ucp)))
+ goto do_sigsegv;
+
+#if 1
+ fenab = 0; /* IMO get_context is like any other system call, thus modifies FPU state -jj */
+#else
+ fenab = (current_thread_info()->fpsaved[0] & FPRS_FEF);
+#endif
+
+ mcp = &ucp->uc_mcontext;
+ grp = &mcp->mc_gregs;
+
+ /* Skip over the trap instruction, first. */
+ if (test_thread_flag(TIF_32BIT)) {
+ regs->tpc = (regs->tnpc & 0xffffffff);
+ regs->tnpc = (regs->tnpc + 4) & 0xffffffff;
+ } else {
+ regs->tpc = regs->tnpc;
+ regs->tnpc += 4;
+ }
+ err = 0;
+ if (_NSIG_WORDS == 1)
+ err |= __put_user(current->blocked.sig[0],
+ (unsigned long __user *)&ucp->uc_sigmask);
+ else
+ err |= __copy_to_user(&ucp->uc_sigmask, ¤t->blocked,
+ sizeof(sigset_t));
+
+ err |= __put_user(regs->tstate, &((*grp)[MC_TSTATE]));
+ err |= __put_user(regs->tpc, &((*grp)[MC_PC]));
+ err |= __put_user(regs->tnpc, &((*grp)[MC_NPC]));
+ err |= __put_user(regs->y, &((*grp)[MC_Y]));
+ err |= __put_user(regs->u_regs[UREG_G1], &((*grp)[MC_G1]));
+ err |= __put_user(regs->u_regs[UREG_G2], &((*grp)[MC_G2]));
+ err |= __put_user(regs->u_regs[UREG_G3], &((*grp)[MC_G3]));
+ err |= __put_user(regs->u_regs[UREG_G4], &((*grp)[MC_G4]));
+ err |= __put_user(regs->u_regs[UREG_G5], &((*grp)[MC_G5]));
+ err |= __put_user(regs->u_regs[UREG_G6], &((*grp)[MC_G6]));
+ err |= __put_user(regs->u_regs[UREG_G7], &((*grp)[MC_G7]));
+ err |= __put_user(regs->u_regs[UREG_I0], &((*grp)[MC_O0]));
+ err |= __put_user(regs->u_regs[UREG_I1], &((*grp)[MC_O1]));
+ err |= __put_user(regs->u_regs[UREG_I2], &((*grp)[MC_O2]));
+ err |= __put_user(regs->u_regs[UREG_I3], &((*grp)[MC_O3]));
+ err |= __put_user(regs->u_regs[UREG_I4], &((*grp)[MC_O4]));
+ err |= __put_user(regs->u_regs[UREG_I5], &((*grp)[MC_O5]));
+ err |= __put_user(regs->u_regs[UREG_I6], &((*grp)[MC_O6]));
+ err |= __put_user(regs->u_regs[UREG_I7], &((*grp)[MC_O7]));
+
+ err |= __get_user(fp,
+ (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[6])));
+ err |= __get_user(i7,
+ (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[7])));
+ err |= __put_user(fp, &(mcp->mc_fp));
+ err |= __put_user(i7, &(mcp->mc_i7));
+
+ err |= __put_user(fenab, &(mcp->mc_fpregs.mcfpu_enab));
+ if (fenab) {
+ unsigned long *fpregs = current_thread_info()->fpregs;
+ unsigned long fprs;
+
+ fprs = current_thread_info()->fpsaved[0];
+ if (fprs & FPRS_DL)
+ err |= copy_to_user(&(mcp->mc_fpregs.mcfpu_fregs), fpregs,
+ (sizeof(unsigned int) * 32));
+ if (fprs & FPRS_DU)
+ err |= copy_to_user(
+ ((unsigned long __user *)&(mcp->mc_fpregs.mcfpu_fregs))+16, fpregs+16,
+ (sizeof(unsigned int) * 32));
+ err |= __put_user(current_thread_info()->xfsr[0], &(mcp->mc_fpregs.mcfpu_fsr));
+ err |= __put_user(current_thread_info()->gsr[0], &(mcp->mc_fpregs.mcfpu_gsr));
+ err |= __put_user(fprs, &(mcp->mc_fpregs.mcfpu_fprs));
+ }
+ if (err)
+ goto do_sigsegv;
+
+ return;
+do_sigsegv:
+ force_sig(SIGSEGV, current);
+}
+
+struct rt_signal_frame {
+ struct sparc_stackf ss;
+ siginfo_t info;
+ struct pt_regs regs;
+ __siginfo_fpu_t __user *fpu_save;
+ stack_t stack;
+ sigset_t mask;
+ __siginfo_fpu_t fpu_state;
+};
+
+/* Align macros */
+#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;
+
+#ifdef CONFIG_SPARC32_COMPAT
+ if (test_thread_flag(TIF_32BIT)) {
+ extern asmlinkage void _sigpause32_common(compat_old_sigset_t,
+ struct pt_regs *);
+ _sigpause32_common(set, regs);
+ return;
+ }
+#endif
+ set &= _BLOCKABLE;
+ spin_lock_irq(¤t->sighand->siglock);
+ saveset = current->blocked;
+ siginitset(¤t->blocked, set);
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+
+ if (test_thread_flag(TIF_32BIT)) {
+ regs->tpc = (regs->tnpc & 0xffffffff);
+ regs->tnpc = (regs->tnpc + 4) & 0xffffffff;
+ } else {
+ regs->tpc = regs->tnpc;
+ regs->tnpc += 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->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY);
+ 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->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY);
+ regs->u_regs[UREG_I0] = EINVAL;
+ return;
+ }
+ if (copy_from_user(&set, uset, sizeof(set))) {
+ regs->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY);
+ 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);
+
+ if (test_thread_flag(TIF_32BIT)) {
+ regs->tpc = (regs->tnpc & 0xffffffff);
+ regs->tnpc = (regs->tnpc + 4) & 0xffffffff;
+ } else {
+ regs->tpc = regs->tnpc;
+ regs->tnpc += 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->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY);
+ 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)
+{
+ unsigned long *fpregs = current_thread_info()->fpregs;
+ unsigned long fprs;
+ int err;
+
+ err = __get_user(fprs, &fpu->si_fprs);
+ fprs_write(0);
+ regs->tstate &= ~TSTATE_PEF;
+ if (fprs & FPRS_DL)
+ err |= copy_from_user(fpregs, &fpu->si_float_regs[0],
+ (sizeof(unsigned int) * 32));
+ if (fprs & FPRS_DU)
+ err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32],
+ (sizeof(unsigned int) * 32));
+ err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
+ err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
+ current_thread_info()->fpsaved[0] |= fprs;
+ return err;
+}
+
+void do_rt_sigreturn(struct pt_regs *regs)
+{
+ struct rt_signal_frame __user *sf;
+ unsigned long tpc, tnpc, tstate;
+ __siginfo_fpu_t __user *fpu_save;
+ mm_segment_t old_fs;
+ sigset_t set;
+ stack_t st;
+ int err;
+
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
+ synchronize_user_stack ();
+ sf = (struct rt_signal_frame __user *)
+ (regs->u_regs [UREG_FP] + STACK_BIAS);
+
+ /* 1. Make sure we are not getting garbage from the user */
+ if (((unsigned long) sf) & 3)
+ goto segv;
+
+ err = get_user(tpc, &sf->regs.tpc);
+ err |= __get_user(tnpc, &sf->regs.tnpc);
+ if (test_thread_flag(TIF_32BIT)) {
+ tpc &= 0xffffffff;
+ tnpc &= 0xffffffff;
+ }
+ err |= ((tpc | tnpc) & 3);
+
+ /* 2. Restore the state */
+ err |= __get_user(regs->y, &sf->regs.y);
+ err |= __get_user(tstate, &sf->regs.tstate);
+ err |= copy_from_user(regs->u_regs, sf->regs.u_regs, sizeof(regs->u_regs));
+
+ /* User can only change condition codes and %asi in %tstate. */
+ regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
+ regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
+
+ err |= __get_user(fpu_save, &sf->fpu_save);
+ if (fpu_save)
+ err |= restore_fpu_state(regs, &sf->fpu_state);
+
+ 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->tpc = tpc;
+ regs->tnpc = tnpc;
+
+ /* 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 int invalid_frame_pointer(void __user *fp, int fplen)
+{
+ if (((unsigned long) fp) & 7)
+ return 1;
+ return 0;
+}
+
+static inline int
+save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
+{
+ unsigned long *fpregs = (unsigned long *)(regs+1);
+ unsigned long fprs;
+ int err = 0;
+
+ fprs = current_thread_info()->fpsaved[0];
+ if (fprs & FPRS_DL)
+ err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
+ (sizeof(unsigned int) * 32));
+ if (fprs & FPRS_DU)
+ err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
+ (sizeof(unsigned int) * 32));
+ err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
+ err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr);
+ err |= __put_user(fprs, &fpu->si_fprs);
+
+ return err;
+}
+
+static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, unsigned long framesize)
+{
+ unsigned long sp;
+
+ sp = regs->u_regs[UREG_FP] + STACK_BIAS;
+
+ /* This is the X/Open sanctioned signal stack switching. */
+ if (ka->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_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, err;
+
+ /* 1. Make sure everything is clean */
+ synchronize_user_stack();
+ save_and_clear_fpu();
+
+ sigframe_size = RT_ALIGNEDSZ;
+ if (!(current_thread_info()->fpsaved[0] & FPRS_FEF))
+ sigframe_size -= sizeof(__siginfo_fpu_t);
+
+ sf = (struct rt_signal_frame __user *)
+ get_sigframe(ka, regs, sigframe_size);
+
+ if (invalid_frame_pointer (sf, sigframe_size))
+ goto sigill;
+
+ if (get_thread_wsaved() != 0)
+ goto sigill;
+
+ /* 2. Save the current process state */
+ err = copy_to_user(&sf->regs, regs, sizeof (*regs));
+
+ if (current_thread_info()->fpsaved[0] & FPRS_FEF) {
+ err |= save_fpu_state(regs, &sf->fpu_state);
+ err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
+ } else {
+ err |= __put_user(0, &sf->fpu_save);
+ }
+
+ /* 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->mask, oldset, sizeof(sigset_t));
+
+ err |= copy_in_user((u64 __user *)sf,
+ (u64 __user *)(regs->u_regs[UREG_FP]+STACK_BIAS),
+ sizeof(struct reg_window));
+
+ if (info)
+ err |= copy_siginfo_to_user(&sf->info, info);
+ else {
+ err |= __put_user(signo, &sf->info.si_signo);
+ err |= __put_user(SI_NOINFO, &sf->info.si_code);
+ }
+ if (err)
+ goto sigsegv;
+
+ /* 3. signal handler back-trampoline and parameters */
+ regs->u_regs[UREG_FP] = ((unsigned long) sf) - STACK_BIAS;
+ regs->u_regs[UREG_I0] = signo;
+ regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
+
+ /* The sigcontext is passed in this way because of how it
+ * is defined in GLIBC's /usr/include/bits/sigcontext.h
+ * for sparc64. It includes the 128 bytes of siginfo_t.
+ */
+ regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
+
+ /* 5. signal handler */
+ regs->tpc = (unsigned long) ka->sa.sa_handler;
+ regs->tnpc = (regs->tpc + 4);
+ if (test_thread_flag(TIF_32BIT)) {
+ regs->tpc &= 0xffffffff;
+ regs->tnpc &= 0xffffffff;
+ }
+ /* 4. return to kernel instructions */
+ regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
+ return;
+
+sigill:
+ do_exit(SIGILL);
+sigsegv:
+ force_sigsegv(signo, current);
+}
+
+static inline void handle_signal(unsigned long signr, struct k_sigaction *ka,
+ siginfo_t *info,
+ sigset_t *oldset, struct pt_regs *regs)
+{
+ setup_rt_frame(ka, regs, signr, oldset,
+ (ka->sa.sa_flags & SA_SIGINFO) ? info : NULL);
+ 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->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY);
+ 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->tpc -= 4;
+ regs->tnpc -= 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.
+ */
+static int do_signal(sigset_t *oldset, struct pt_regs * regs,
+ unsigned long orig_i0, int restart_syscall)
+{
+ siginfo_t info;
+ struct signal_deliver_cookie cookie;
+ struct k_sigaction ka;
+ int signr;
+
+ cookie.restart_syscall = restart_syscall;
+ cookie.orig_i0 = orig_i0;
+
+ if (!oldset)
+ oldset = ¤t->blocked;
+
+#ifdef CONFIG_SPARC32_COMPAT
+ if (test_thread_flag(TIF_32BIT)) {
+ extern int do_signal32(sigset_t *, struct pt_regs *,
+ unsigned long, int);
+ return do_signal32(oldset, regs, orig_i0,
+ cookie.restart_syscall);
+ }
+#endif
+
+ signr = get_signal_to_deliver(&info, &ka, regs, &cookie);
+ if (signr > 0) {
+ if (cookie.restart_syscall)
+ syscall_restart(orig_i0, regs, &ka.sa);
+ handle_signal(signr, &ka, &info, oldset, regs);
+ 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->tpc -= 4;
+ regs->tnpc -= 4;
+ }
+ if (cookie.restart_syscall &&
+ regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
+ regs->u_regs[UREG_G1] = __NR_restart_syscall;
+ regs->tpc -= 4;
+ regs->tnpc -= 4;
+ }
+ return 0;
+}
+
+void do_notify_resume(sigset_t *oldset, struct pt_regs *regs,
+ unsigned long orig_i0, int restart_syscall,
+ unsigned long thread_info_flags)
+{
+ if (thread_info_flags & _TIF_SIGPENDING)
+ do_signal(oldset, regs, orig_i0, restart_syscall);
+}
+
+void ptrace_signal_deliver(struct pt_regs *regs, void *cookie)
+{
+ struct signal_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->tpc -= 4;
+ regs->tnpc -= 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->tpc -= 4;
+ regs->tnpc -= 4;
+ cp->restart_syscall = 0;
+ }
+}