diff options
Diffstat (limited to 'arch/ppc/kernel')
| -rw-r--r-- | arch/ppc/kernel/traps.c | 64 | ||||
| -rw-r--r-- | arch/ppc/kernel/vmlinux.lds.S | 1 |
2 files changed, 7 insertions, 58 deletions
diff --git a/arch/ppc/kernel/traps.c b/arch/ppc/kernel/traps.c index 2f835b9e95e..810f7aa72e9 100644 --- a/arch/ppc/kernel/traps.c +++ b/arch/ppc/kernel/traps.c @@ -28,6 +28,7 @@ #include <linux/init.h> #include <linux/module.h> #include <linux/prctl.h> +#include <linux/bug.h> #include <asm/pgtable.h> #include <asm/uaccess.h> @@ -559,64 +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) @@ -671,7 +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; } diff --git a/arch/ppc/kernel/vmlinux.lds.S b/arch/ppc/kernel/vmlinux.lds.S index 16e8661e1fe..61921268a0d 100644 --- a/arch/ppc/kernel/vmlinux.lds.S +++ b/arch/ppc/kernel/vmlinux.lds.S @@ -31,6 +31,7 @@ SECTIONS .plt : { *(.plt) } .text : { + _text = .; *(.text) SCHED_TEXT LOCK_TEXT |