fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / arch / ppc / kernel / traps.c

diff --git a/arch/ppc/kernel/traps.c b/arch/ppc/kernel/traps.c
index aa9dd0d..99015bb 100644 (file)
--- a/arch/ppc/kernel/traps.c
+++ b/arch/ppc/kernel/traps.c
@@ -1,6 +1,4 @@
 /*
- *  arch/ppc/kernel/traps.c
- *
  *  Copyright (C) 1995-1996  Gary Thomas (gdt@linuxppc.org)
  *
  *  This program is free software; you can redistribute it and/or
@@ -27,10 +25,10 @@
 #include <linux/user.h>
 #include <linux/a.out.h>
 #include <linux/interrupt.h>
-#include <linux/config.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/prctl.h>
+#include <linux/bug.h>
 
 #include <asm/pgtable.h>
 #include <asm/uaccess.h>
@@ -122,7 +120,7 @@ void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr)
         * generate the same exception over and over again and we get
         * nowhere.  Better to kill it and let the kernel panic.
         */
-       if (current->pid == 1) {
+       if (is_init(current)) {
                __sighandler_t handler;
 
                spin_lock_irq(&current->sighand->siglock);
@@ -319,7 +317,7 @@ void machine_check_exception(struct pt_regs *regs)
        if (reason & MCSR_BUS_RBERR)
                printk("Bus - Read Data Bus Error\n");
        if (reason & MCSR_BUS_WBERR)
-               printk("Bus - Read Data Bus Error\n");
+               printk("Bus - Write Data Bus Error\n");
        if (reason & MCSR_BUS_IPERR)
                printk("Bus - Instruction Parity Error\n");
        if (reason & MCSR_BUS_RPERR)
@@ -562,64 +560,9 @@ static void emulate_single_step(struct pt_regs *regs)
        }
 }
 
-/*
- * Look through the list of trap instructions that are used for BUG(),
- * BUG_ON() and WARN_ON() and see if we hit one.  At this point we know
- * that the exception was caused by a trap instruction of some kind.
- * Returns 1 if we should continue (i.e. it was a WARN_ON) or 0
- * otherwise.
- */
-extern struct bug_entry __start___bug_table[], __stop___bug_table[];
-
-#ifndef CONFIG_MODULES
-#define module_find_bug(x)     NULL
-#endif
-
-struct bug_entry *find_bug(unsigned long bugaddr)
-{
-       struct bug_entry *bug;
-
-       for (bug = __start___bug_table; bug < __stop___bug_table; ++bug)
-               if (bugaddr == bug->bug_addr)
-                       return bug;
-       return module_find_bug(bugaddr);
-}
-
-int check_bug_trap(struct pt_regs *regs)
+int is_valid_bugaddr(unsigned long addr)
 {
-       struct bug_entry *bug;
-       unsigned long addr;
-
-       if (regs->msr & MSR_PR)
-               return 0;       /* not in kernel */
-       addr = regs->nip;       /* address of trap instruction */
-       if (addr < PAGE_OFFSET)
-               return 0;
-       bug = find_bug(regs->nip);
-       if (bug == NULL)
-               return 0;
-       if (bug->line & BUG_WARNING_TRAP) {
-               /* this is a WARN_ON rather than BUG/BUG_ON */
-#ifdef CONFIG_XMON
-               xmon_printf(KERN_ERR "Badness in %s at %s:%ld\n",
-                      bug->function, bug->file,
-                      bug->line & ~BUG_WARNING_TRAP);
-#endif /* CONFIG_XMON */               
-               printk(KERN_ERR "Badness in %s at %s:%ld\n",
-                      bug->function, bug->file,
-                      bug->line & ~BUG_WARNING_TRAP);
-               dump_stack();
-               return 1;
-       }
-#ifdef CONFIG_XMON
-       xmon_printf(KERN_CRIT "kernel BUG in %s at %s:%ld!\n",
-              bug->function, bug->file, bug->line);
-       xmon(regs);
-#endif /* CONFIG_XMON */
-       printk(KERN_CRIT "kernel BUG in %s at %s:%ld!\n",
-              bug->function, bug->file, bug->line);
-
-       return 0;
+       return addr >= PAGE_OFFSET;
 }
 
 void program_check_exception(struct pt_regs *regs)
@@ -674,7 +617,9 @@ void program_check_exception(struct pt_regs *regs)
                /* trap exception */
                if (debugger_bpt(regs))
                        return;
-               if (check_bug_trap(regs)) {
+
+               if (!(regs->msr & MSR_PR) &&  /* not user-mode */
+                   report_bug(regs->nip) == BUG_TRAP_TYPE_WARN) {
                        regs->nip += 4;
                        return;
                }
@@ -751,8 +696,9 @@ void nonrecoverable_exception(struct pt_regs *regs)
 
 void trace_syscall(struct pt_regs *regs)
 {
-       printk("Task: %p(%d), PC: %08lX/%08lX, Syscall: %3ld, Result: %s%ld    %s\n",
-              current, current->pid, regs->nip, regs->link, regs->gpr[0],
+       printk("Task: %p(%d[#%u]), PC: %08lX/%08lX, Syscall: %3ld, Result: %s%ld    %s\n",
+              current, current->pid, current->xid,
+              regs->nip, regs->link, regs->gpr[0],
               regs->ccr&0x10000000?"Error=":"", regs->gpr[3], print_tainted());
 }