Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 438 insertions, 0 deletions

diff --git a/arch/m32r/kernel/signal.c b/arch/m32r/kernel/signal.c
new file mode 100644
index 00000000000..50311eb07a2
--- /dev/null
+++ b/arch/m32r/kernel/signal.c
@@ -0,0 +1,438 @@
+/*
+ *  linux/arch/m32r/kernel/signal.c
+ *
+ *  Copyright (c) 2003  Hitoshi Yamamoto
+ *
+ *  Taken from i386 version.
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *
+ *  1997-11-28  Modified for POSIX.1b signals by Richard Henderson
+ *  2000-06-20  Pentium III FXSR, SSE support by Gareth Hughes
+ */
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/wait.h>
+#include <linux/unistd.h>
+#include <linux/stddef.h>
+#include <linux/personality.h>
+#include <linux/suspend.h>
+#include <asm/cacheflush.h>
+#include <asm/ucontext.h>
+#include <asm/uaccess.h>
+
+#define DEBUG_SIG 0
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+int do_signal(struct pt_regs *, sigset_t *);
+
+asmlinkage int
+sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize,
+		  unsigned long r2, unsigned long r3, unsigned long r4,
+		  unsigned long r5, unsigned long r6, struct pt_regs regs)
+{
+	sigset_t saveset, newset;
+
+	/* XXX: Don't preclude handling different sized sigset_t's.  */
+	if (sigsetsize != sizeof(sigset_t))
+		return -EINVAL;
+
+	if (copy_from_user(&newset, unewset, sizeof(newset)))
+		return -EFAULT;
+	sigdelsetmask(&newset, ~_BLOCKABLE);
+
+	spin_lock_irq(&current->sighand->siglock);
+	saveset = current->blocked;
+	current->blocked = newset;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+
+	regs.r0 = -EINTR;
+	while (1) {
+		current->state = TASK_INTERRUPTIBLE;
+		schedule();
+		if (do_signal(&regs, &saveset))
+			return regs.r0;
+	}
+}
+
+asmlinkage int
+sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
+		unsigned long r2, unsigned long r3, unsigned long r4,
+		unsigned long r5, unsigned long r6, struct pt_regs regs)
+{
+	return do_sigaltstack(uss, uoss, regs.spu);
+}
+
+
+/*
+ * Do a signal return; undo the signal stack.
+ */
+
+struct rt_sigframe
+{
+	int sig;
+	struct siginfo *pinfo;
+	void *puc;
+	struct siginfo info;
+	struct ucontext uc;
+//	struct _fpstate fpstate;
+};
+
+static int
+restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc,
+		   int *r0_p)
+{
+	unsigned int err = 0;
+
+	/* Always make any pending restarted system calls return -EINTR */
+	current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
+#define COPY(x)		err |= __get_user(regs->x, &sc->sc_##x)
+	COPY(r4);
+	COPY(r5);
+	COPY(r6);
+	COPY(pt_regs);
+	/* COPY(r0); Skip r0 */
+	COPY(r1);
+	COPY(r2);
+	COPY(r3);
+	COPY(r7);
+	COPY(r8);
+	COPY(r9);
+	COPY(r10);
+	COPY(r11);
+	COPY(r12);
+#if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
+	COPY(acc0h);
+	COPY(acc0l);
+	COPY(acc1h);
+	COPY(acc1l);
+#elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
+	COPY(acch);
+	COPY(accl);
+#else
+#error unknown isa configuration
+#endif
+	COPY(psw);
+	COPY(bpc);
+	COPY(bbpsw);
+	COPY(bbpc);
+	COPY(spu);
+	COPY(fp);
+	COPY(lr);
+	COPY(spi);
+#undef COPY
+
+	regs->syscall_nr = -1;	/* disable syscall checks */
+	err |= __get_user(*r0_p, &sc->sc_r0);
+
+	return err;
+}
+
+asmlinkage int
+sys_rt_sigreturn(unsigned long r0, unsigned long r1,
+		 unsigned long r2, unsigned long r3, unsigned long r4,
+		 unsigned long r5, unsigned long r6, struct pt_regs regs)
+{
+	struct rt_sigframe __user *frame = (struct rt_sigframe __user *)regs.spu;
+	sigset_t set;
+	stack_t st;
+	int result;
+
+	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+		goto badframe;
+	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+		goto badframe;
+
+	sigdelsetmask(&set, ~_BLOCKABLE);
+	spin_lock_irq(&current->sighand->siglock);
+	current->blocked = set;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+
+	if (restore_sigcontext(&regs, &frame->uc.uc_mcontext, &result))
+		goto badframe;
+
+	if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
+		goto badframe;
+	/* It is more difficult to avoid calling this function than to
+	   call it and ignore errors.  */
+	do_sigaltstack(&st, NULL, regs.spu);
+
+	return result;
+
+badframe:
+	force_sig(SIGSEGV, current);
+	return 0;
+}
+
+/*
+ * Set up a signal frame.
+ */
+
+static int
+setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
+	         unsigned long mask)
+{
+	int err = 0;
+
+#define COPY(x)	err |= __put_user(regs->x, &sc->sc_##x)
+	COPY(r4);
+	COPY(r5);
+	COPY(r6);
+	COPY(pt_regs);
+	COPY(r0);
+	COPY(r1);
+	COPY(r2);
+	COPY(r3);
+	COPY(r7);
+	COPY(r8);
+	COPY(r9);
+	COPY(r10);
+	COPY(r11);
+	COPY(r12);
+#if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
+	COPY(acc0h);
+	COPY(acc0l);
+	COPY(acc1h);
+	COPY(acc1l);
+#elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
+	COPY(acch);
+	COPY(accl);
+#else
+#error unknown isa configuration
+#endif
+	COPY(psw);
+	COPY(bpc);
+	COPY(bbpsw);
+	COPY(bbpc);
+	COPY(spu);
+	COPY(fp);
+	COPY(lr);
+	COPY(spi);
+#undef COPY
+
+	err |= __put_user(mask, &sc->oldmask);
+
+	return err;
+}
+
+/*
+ * Determine which stack to use..
+ */
+static inline void __user *
+get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
+{
+	/* This is the X/Open sanctioned signal stack switching.  */
+	if (ka->sa.sa_flags & SA_ONSTACK) {
+		if (sas_ss_flags(sp) == 0)
+			sp = current->sas_ss_sp + current->sas_ss_size;
+	}
+
+	return (void __user *)((sp - frame_size) & -8ul);
+}
+
+static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+			   sigset_t *set, struct pt_regs *regs)
+{
+	struct rt_sigframe __user *frame;
+	int err = 0;
+	int signal;
+
+	frame = get_sigframe(ka, regs->spu, sizeof(*frame));
+
+	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+		goto give_sigsegv;
+
+	signal = current_thread_info()->exec_domain
+		&& current_thread_info()->exec_domain->signal_invmap
+		&& sig < 32
+		? current_thread_info()->exec_domain->signal_invmap[sig]
+		: sig;
+
+	err |= __put_user(signal, &frame->sig);
+	if (err)
+		goto give_sigsegv;
+
+	err |= __put_user(&frame->info, &frame->pinfo);
+	err |= __put_user(&frame->uc, &frame->puc);
+	err |= copy_siginfo_to_user(&frame->info, info);
+	if (err)
+		goto give_sigsegv;
+
+	/* Create the ucontext.  */
+	err |= __put_user(0, &frame->uc.uc_flags);
+	err |= __put_user(0, &frame->uc.uc_link);
+	err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
+	err |= __put_user(sas_ss_flags(regs->spu),
+			  &frame->uc.uc_stack.ss_flags);
+	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
+	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+	if (err)
+		goto give_sigsegv;
+
+	/* Set up to return from userspace.  */
+	regs->lr = (unsigned long)ka->sa.sa_restorer;
+
+	/* Set up registers for signal handler */
+	regs->spu = (unsigned long)frame;
+	regs->r0 = signal;	/* Arg for signal handler */
+	regs->r1 = (unsigned long)&frame->info;
+	regs->r2 = (unsigned long)&frame->uc;
+	regs->bpc = (unsigned long)ka->sa.sa_handler;
+
+	set_fs(USER_DS);
+
+#if DEBUG_SIG
+	printk("SIG deliver (%s:%d): sp=%p pc=%p\n",
+		current->comm, current->pid, frame, regs->pc);
+#endif
+
+	return;
+
+give_sigsegv:
+	force_sigsegv(sig, current);
+}
+
+/*
+ * OK, we're invoking a handler
+ */
+
+static void
+handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
+	      sigset_t *oldset, struct pt_regs *regs)
+{
+	unsigned short inst;
+
+	/* Are we from a system call? */
+	if (regs->syscall_nr >= 0) {
+		/* If so, check system call restarting.. */
+		switch (regs->r0) {
+		        case -ERESTART_RESTARTBLOCK:
+			case -ERESTARTNOHAND:
+				regs->r0 = -EINTR;
+				break;
+
+			case -ERESTARTSYS:
+				if (!(ka->sa.sa_flags & SA_RESTART)) {
+					regs->r0 = -EINTR;
+					break;
+				}
+			/* fallthrough */
+			case -ERESTARTNOINTR:
+				regs->r0 = regs->orig_r0;
+				inst = *(unsigned short *)(regs->bpc - 2);
+				if ((inst & 0xfff0) == 0x10f0)	/* trap ? */
+					regs->bpc -= 2;
+				else
+					regs->bpc -= 4;
+		}
+	}
+
+	/* Set up the stack frame */
+	setup_rt_frame(sig, ka, info, oldset, regs);
+
+	if (!(ka->sa.sa_flags & SA_NODEFER)) {
+		spin_lock_irq(&current->sighand->siglock);
+		sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
+		sigaddset(&current->blocked,sig);
+		recalc_sigpending();
+		spin_unlock_irq(&current->sighand->siglock);
+	}
+}
+
+/*
+ * 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.
+ */
+int do_signal(struct pt_regs *regs, sigset_t *oldset)
+{
+	siginfo_t info;
+	int signr;
+	struct k_sigaction ka;
+	unsigned short inst;
+
+	/*
+	 * 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 (current->flags & PF_FREEZE) {
+		refrigerator(0);
+		goto no_signal;
+	}
+
+	if (!oldset)
+		oldset = &current->blocked;
+
+	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+	if (signr > 0) {
+		/* Reenable any watchpoints before delivering the
+		 * signal to user space. The processor register will
+		 * have been cleared if the watchpoint triggered
+		 * inside the kernel.
+		 */
+
+		/* Whee!  Actually deliver the signal.  */
+		handle_signal(signr, &ka, &info, oldset, regs);
+		return 1;
+	}
+
+ no_signal:
+	/* Did we come from a system call? */
+	if (regs->syscall_nr >= 0) {
+		/* Restart the system call - no handlers present */
+		if (regs->r0 == -ERESTARTNOHAND ||
+		    regs->r0 == -ERESTARTSYS ||
+		    regs->r0 == -ERESTARTNOINTR) {
+			regs->r0 = regs->orig_r0;
+			inst = *(unsigned short *)(regs->bpc - 2);
+			if ((inst & 0xfff0) == 0x10f0)	/* trap ? */
+				regs->bpc -= 2;
+			else
+				regs->bpc -= 4;
+		}
+		if (regs->r0 == -ERESTART_RESTARTBLOCK){
+			regs->r0 = regs->orig_r0;
+			regs->r7 = __NR_restart_syscall;
+			inst = *(unsigned short *)(regs->bpc - 2);
+			if ((inst & 0xfff0) == 0x10f0)	/* trap ? */
+				regs->bpc -= 2;
+			else
+				regs->bpc -= 4;
+		}
+	}
+	return 0;
+}
+
+/*
+ * notification of userspace execution resumption
+ * - triggered by current->work.notify_resume
+ */
+void do_notify_resume(struct pt_regs *regs, sigset_t *oldset,
+		      __u32 thread_info_flags)
+{
+	/* Pending single-step? */
+	if (thread_info_flags & _TIF_SINGLESTEP)
+		clear_thread_flag(TIF_SINGLESTEP);
+
+	/* deal with pending signal delivery */
+	if (thread_info_flags & _TIF_SIGPENDING)
+		do_signal(regs,oldset);
+
+	clear_thread_flag(TIF_IRET);
+}