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, 332 insertions, 0 deletions

diff --git a/arch/m32r/kernel/traps.c b/arch/m32r/kernel/traps.c
new file mode 100644
index 000000000000..01922271d17e
--- /dev/null
+++ b/arch/m32r/kernel/traps.c
@@ -0,0 +1,332 @@
+/*
+ *  linux/arch/m32r/kernel/traps.c
+ *
+ *  Copyright (C) 2001, 2002  Hirokazu Takata, Hiroyuki Kondo,
+ *                            Hitoshi Yamamoto
+ */
+
+/* $Id$ */
+
+/*
+ * 'traps.c' handles hardware traps and faults after we have saved some
+ * state in 'entry.S'.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/kallsyms.h>
+#include <linux/stddef.h>
+#include <linux/ptrace.h>
+#include <linux/mm.h>
+#include <asm/page.h>
+#include <asm/processor.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/atomic.h>
+
+#include <asm/smp.h>
+
+#include <linux/module.h>
+
+asmlinkage void alignment_check(void);
+asmlinkage void ei_handler(void);
+asmlinkage void rie_handler(void);
+asmlinkage void debug_trap(void);
+asmlinkage void cache_flushing_handler(void);
+
+#ifdef CONFIG_SMP
+extern void smp_reschedule_interrupt(void);
+extern void smp_invalidate_interrupt(void);
+extern void smp_call_function_interrupt(void);
+extern void smp_ipi_timer_interrupt(void);
+extern void smp_flush_cache_all_interrupt(void);
+
+/*
+ * for Boot AP function
+ */
+asm (
+        "       .section .eit_vector4,\"ax\"    \n"
+        "       .global _AP_RE                  \n"
+        "       .global startup_AP              \n"
+        "_AP_RE:                                \n"
+        "       .fill 32, 4, 0                  \n"
+        "_AP_EI: bra    startup_AP              \n"
+        "       .previous                       \n"
+);
+#endif  /* CONFIG_SMP */
+
+extern unsigned long    eit_vector[];
+#define BRA_INSN(func, entry)   \
+        ((unsigned long)func - (unsigned long)eit_vector - entry*4)/4 \
+        + 0xff000000UL
+
+void    set_eit_vector_entries(void)
+{
+        extern void default_eit_handler(void);
+        extern void system_call(void);
+        extern void pie_handler(void);
+        extern void ace_handler(void);
+        extern void tme_handler(void);
+        extern void _flush_cache_copyback_all(void);
+
+        eit_vector[0] = 0xd0c00001; /* seth r0, 0x01 */
+        eit_vector[1] = BRA_INSN(default_eit_handler, 1);
+        eit_vector[4] = 0xd0c00010; /* seth r0, 0x10 */
+        eit_vector[5] = BRA_INSN(default_eit_handler, 5);
+        eit_vector[8] = BRA_INSN(rie_handler, 8);
+        eit_vector[12] = BRA_INSN(alignment_check, 12);
+        eit_vector[16] = 0xff000000UL;
+        eit_vector[17] = BRA_INSN(debug_trap, 17);
+        eit_vector[18] = BRA_INSN(system_call, 18);
+        eit_vector[19] = 0xff000000UL;
+        eit_vector[20] = 0xff000000UL;
+        eit_vector[21] = 0xff000000UL;
+        eit_vector[22] = 0xff000000UL;
+        eit_vector[23] = 0xff000000UL;
+        eit_vector[24] = 0xff000000UL;
+        eit_vector[25] = 0xff000000UL;
+        eit_vector[26] = 0xff000000UL;
+        eit_vector[27] = 0xff000000UL;
+        eit_vector[28] = BRA_INSN(cache_flushing_handler, 28);
+        eit_vector[29] = 0xff000000UL;
+        eit_vector[30] = 0xff000000UL;
+        eit_vector[31] = 0xff000000UL;
+        eit_vector[32] = BRA_INSN(ei_handler, 32);
+        eit_vector[64] = BRA_INSN(pie_handler, 64);
+#ifdef CONFIG_MMU
+        eit_vector[68] = BRA_INSN(ace_handler, 68);
+        eit_vector[72] = BRA_INSN(tme_handler, 72);
+#endif /* CONFIG_MMU */
+#ifdef CONFIG_SMP
+        eit_vector[184] = (unsigned long)smp_reschedule_interrupt;
+        eit_vector[185] = (unsigned long)smp_invalidate_interrupt;
+        eit_vector[186] = (unsigned long)smp_call_function_interrupt;
+        eit_vector[187] = (unsigned long)smp_ipi_timer_interrupt;
+        eit_vector[188] = (unsigned long)smp_flush_cache_all_interrupt;
+        eit_vector[189] = 0;
+        eit_vector[190] = 0;
+        eit_vector[191] = 0;
+#endif
+        _flush_cache_copyback_all();
+}
+
+void __init trap_init(void)
+{
+        set_eit_vector_entries();
+
+        /*
+         * Should be a barrier for any external CPU state.
+         */
+        cpu_init();
+}
+
+int kstack_depth_to_print = 24;
+
+void show_trace(struct task_struct *task, unsigned long *stack)
+{
+        unsigned long addr;
+
+        if (!stack)
+                stack = (unsigned long*)&stack;
+
+        printk("Call Trace: ");
+        while (!kstack_end(stack)) {
+                addr = *stack++;
+                if (__kernel_text_address(addr)) {
+                        printk("[<%08lx>] ", addr);
+                        print_symbol("%s\n", addr);
+                }
+        }
+        printk("\n");
+}
+
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+        unsigned long  *stack;
+        int  i;
+
+        /*
+         * debugging aid: "show_stack(NULL);" prints the
+         * back trace for this cpu.
+         */
+
+        if(sp==NULL) {
+                if (task)
+                        sp = (unsigned long *)task->thread.sp;
+                else
+                        sp=(unsigned long*)&sp;
+        }
+
+        stack = sp;
+        for(i=0; i < kstack_depth_to_print; i++) {
+                if (kstack_end(stack))
+                        break;
+                if (i && ((i % 4) == 0))
+                        printk("\n       ");
+                printk("%08lx ", *stack++);
+        }
+        printk("\n");
+        show_trace(task, sp);
+}
+
+void dump_stack(void)
+{
+        unsigned long stack;
+
+        show_trace(current, &stack);
+}
+
+EXPORT_SYMBOL(dump_stack);
+
+static void show_registers(struct pt_regs *regs)
+{
+        int i = 0;
+        int in_kernel = 1;
+        unsigned long sp;
+
+        printk("CPU:    %d\n", smp_processor_id());
+        show_regs(regs);
+
+        sp = (unsigned long) (1+regs);
+        if (user_mode(regs)) {
+                in_kernel = 0;
+                sp = regs->spu;
+                printk("SPU: %08lx\n", sp);
+        } else {
+                printk("SPI: %08lx\n", sp);
+        }
+        printk("Process %s (pid: %d, process nr: %d, stackpage=%08lx)",
+                current->comm, current->pid, 0xffff & i, 4096+(unsigned long)current);
+
+        /*
+         * When in-kernel, we also print out the stack and code at the
+         * time of the fault..
+         */
+        if (in_kernel) {
+                printk("\nStack: ");
+                show_stack(current, (unsigned long*) sp);
+
+                printk("\nCode: ");
+                if (regs->bpc < PAGE_OFFSET)
+                        goto bad;
+
+                for(i=0;i<20;i++) {
+                        unsigned char c;
+                        if (__get_user(c, &((unsigned char*)regs->bpc)[i])) {
+bad:
+                                printk(" Bad PC value.");
+                                break;
+                        }
+                        printk("%02x ", c);
+                }
+        }
+        printk("\n");
+}
+
+DEFINE_SPINLOCK(die_lock);
+
+void die(const char * str, struct pt_regs * regs, long err)
+{
+        console_verbose();
+        spin_lock_irq(&die_lock);
+        bust_spinlocks(1);
+        printk("%s: %04lx\n", str, err & 0xffff);
+        show_registers(regs);
+        bust_spinlocks(0);
+        spin_unlock_irq(&die_lock);
+        do_exit(SIGSEGV);
+}
+
+static __inline__ void die_if_kernel(const char * str,
+        struct pt_regs * regs, long err)
+{
+        if (!user_mode(regs))
+                die(str, regs, err);
+}
+
+static __inline__ void do_trap(int trapnr, int signr, const char * str,
+        struct pt_regs * regs, long error_code, siginfo_t *info)
+{
+        if (user_mode(regs)) {
+                /* trap_signal */
+                struct task_struct *tsk = current;
+                tsk->thread.error_code = error_code;
+                tsk->thread.trap_no = trapnr;
+                if (info)
+                        force_sig_info(signr, info, tsk);
+                else
+                        force_sig(signr, tsk);
+                return;
+        } else {
+                /* kernel_trap */
+                if (!fixup_exception(regs))
+                        die(str, regs, error_code);
+                return;
+        }
+}
+
+#define DO_ERROR(trapnr, signr, str, name) \
+asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
+{ \
+        do_trap(trapnr, signr, 0, regs, error_code, NULL); \
+}
+
+#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
+asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
+{ \
+        siginfo_t info; \
+        info.si_signo = signr; \
+        info.si_errno = 0; \
+        info.si_code = sicode; \
+        info.si_addr = (void __user *)siaddr; \
+        do_trap(trapnr, signr, str, regs, error_code, &info); \
+}
+
+DO_ERROR( 1, SIGTRAP, "debug trap", debug_trap)
+DO_ERROR_INFO(0x20, SIGILL,  "reserved instruction ", rie_handler, ILL_ILLOPC, regs->bpc)
+DO_ERROR_INFO(0x100, SIGILL,  "privilege instruction", pie_handler, ILL_PRVOPC, regs->bpc)
+
+extern int handle_unaligned_access(unsigned long, struct pt_regs *);
+
+/* This code taken from arch/sh/kernel/traps.c */
+asmlinkage void do_alignment_check(struct pt_regs *regs, long error_code)
+{
+        mm_segment_t oldfs;
+        unsigned long insn;
+        int tmp;
+
+        oldfs = get_fs();
+
+        if (user_mode(regs)) {
+                local_irq_enable();
+                current->thread.error_code = error_code;
+                current->thread.trap_no = 0x17;
+
+                set_fs(USER_DS);
+                if (copy_from_user(&insn, (void *)regs->bpc, 4)) {
+                        set_fs(oldfs);
+                        goto uspace_segv;
+                }
+                tmp = handle_unaligned_access(insn, regs);
+                set_fs(oldfs);
+
+                if (!tmp)
+                        return;
+
+        uspace_segv:
+                printk(KERN_NOTICE "Killing process \"%s\" due to unaligned "
+                        "access\n", current->comm);
+                force_sig(SIGSEGV, current);
+        } else {
+                set_fs(KERNEL_DS);
+                if (copy_from_user(&insn, (void *)regs->bpc, 4)) {
+                        set_fs(oldfs);
+                        die("insn faulting in do_address_error", regs, 0);
+                }
+                handle_unaligned_access(insn, regs);
+                set_fs(oldfs);
+        }
+}
+