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/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c
new file mode 100644
index 0000000..3544208
--- /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(¤t->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+
+ if (restore_sigcontext(®s, &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" (®s));
+ /* 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);
+}