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, 197 insertions, 0 deletions

diff --git a/arch/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c
new file mode 100644
index 000000000000..3544208d4b4b
--- /dev/null
+++ b/arch/mips/kernel/signal_n32.c
@@ -0,0 +1,197 @@
+/*
+ * Copyright (C) 2003 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+#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/ptrace.h>
+#include <linux/unistd.h>
+#include <linux/compat.h>
+#include <linux/bitops.h>
+
+#include <asm/asm.h>
+#include <asm/cacheflush.h>
+#include <asm/sim.h>
+#include <asm/uaccess.h>
+#include <asm/ucontext.h>
+#include <asm/system.h>
+#include <asm/fpu.h>
+#include <asm/cpu-features.h>
+
+#include "signal-common.h"
+
+/*
+ * Including <asm/unistd.h> would give use the 64-bit syscall numbers ...
+ */
+#define __NR_N32_rt_sigreturn           6211
+#define __NR_N32_restart_syscall        6214
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+/* IRIX compatible stack_t  */
+typedef struct sigaltstack32 {
+        s32 ss_sp;
+        compat_size_t ss_size;
+        int ss_flags;
+} stack32_t;
+
+struct ucontextn32 {
+        u32                 uc_flags;
+        s32                 uc_link;
+        stack32_t           uc_stack;
+        struct sigcontext   uc_mcontext;
+        sigset_t            uc_sigmask;   /* mask last for extensibility */
+};
+
+#if PLAT_TRAMPOLINE_STUFF_LINE
+#define __tramp __attribute__((aligned(PLAT_TRAMPOLINE_STUFF_LINE)))
+#else
+#define __tramp
+#endif
+
+struct rt_sigframe_n32 {
+        u32 rs_ass[4];                  /* argument save space for o32 */
+        u32 rs_code[2] __tramp;         /* signal trampoline */
+        struct siginfo rs_info __tramp;
+        struct ucontextn32 rs_uc;
+};
+
+save_static_function(sysn32_rt_sigreturn);
+__attribute_used__ noinline static void
+_sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
+{
+        struct rt_sigframe_n32 *frame;
+        sigset_t set;
+        stack_t st;
+        s32 sp;
+
+        frame = (struct rt_sigframe_n32 *) regs.regs[29];
+        if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+                goto badframe;
+        if (__copy_from_user(&set, &frame->rs_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->rs_uc.uc_mcontext))
+                goto badframe;
+
+        /* The ucontext contains a stack32_t, so we must convert!  */
+        if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp))
+                goto badframe;
+        st.ss_size = (long) sp;
+        if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size))
+                goto badframe;
+        if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags))
+                goto badframe;
+
+        /* It is more difficult to avoid calling this function than to
+           call it and ignore errors.  */
+        do_sigaltstack(&st, NULL, regs.regs[29]);
+
+        /*
+         * Don't let your children do this ...
+         */
+        __asm__ __volatile__(
+                "move\t$29, %0\n\t"
+                "j\tsyscall_exit"
+                :/* no outputs */
+                :"r" (&regs));
+        /* Unreached */
+
+badframe:
+        force_sig(SIGSEGV, current);
+}
+
+void setup_rt_frame_n32(struct k_sigaction * ka,
+        struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info)
+{
+        struct rt_sigframe_n32 *frame;
+        int err = 0;
+        s32 sp;
+
+        frame = get_sigframe(ka, regs, sizeof(*frame));
+        if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+                goto give_sigsegv;
+
+        /*
+         * Set up the return code ...
+         *
+         *         li      v0, __NR_rt_sigreturn
+         *         syscall
+         */
+        if (PLAT_TRAMPOLINE_STUFF_LINE)
+                __clear_user(frame->rs_code, PLAT_TRAMPOLINE_STUFF_LINE);
+        err |= __put_user(0x24020000 + __NR_N32_rt_sigreturn, frame->rs_code + 0);
+        err |= __put_user(0x0000000c                        , frame->rs_code + 1);
+        flush_cache_sigtramp((unsigned long) frame->rs_code);
+
+        /* Create siginfo.  */
+        err |= copy_siginfo_to_user(&frame->rs_info, info);
+
+        /* Create the ucontext.  */
+        err |= __put_user(0, &frame->rs_uc.uc_flags);
+        err |= __put_user(0, &frame->rs_uc.uc_link);
+        sp = (int) (long) current->sas_ss_sp;
+        err |= __put_user(sp,
+                          &frame->rs_uc.uc_stack.ss_sp);
+        err |= __put_user(sas_ss_flags(regs->regs[29]),
+                          &frame->rs_uc.uc_stack.ss_flags);
+        err |= __put_user(current->sas_ss_size,
+                          &frame->rs_uc.uc_stack.ss_size);
+        err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
+        err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set));
+
+        if (err)
+                goto give_sigsegv;
+
+        /*
+         * Arguments to signal handler:
+         *
+         *   a0 = signal number
+         *   a1 = 0 (should be cause)
+         *   a2 = pointer to ucontext
+         *
+         * $25 and c0_epc point to the signal handler, $29 points to
+         * the struct rt_sigframe.
+         */
+        regs->regs[ 4] = signr;
+        regs->regs[ 5] = (unsigned long) &frame->rs_info;
+        regs->regs[ 6] = (unsigned long) &frame->rs_uc;
+        regs->regs[29] = (unsigned long) frame;
+        regs->regs[31] = (unsigned long) frame->rs_code;
+        regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
+
+#if DEBUG_SIG
+        printk("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%p\n",
+               current->comm, current->pid,
+               frame, regs->cp0_epc, regs->regs[31]);
+#endif
+        return;
+
+give_sigsegv:
+        force_sigsegv(signr, current);
+}