From a604b38036bee1483fb98a520c69895d5d6276a6 Mon Sep 17 00:00:00 2001 From: Harvey Harrison Date: Wed, 30 Jan 2008 13:32:59 +0100 Subject: [PATCH] x86: introduce __die helper to X86_32 Small step towards unifying traps_32|64.c. No functional changes. Pull out a small helper from an if() statement in die(). Marked as __kprobes as eventually we will want to call this from do_page_fault similar to how X86_64 does it. Signed-off-by: Harvey Harrison Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/kernel/traps_32.c | 76 +++++++++++++++++++++----------------- 1 file changed, 42 insertions(+), 34 deletions(-) diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c index 2eb6ca0ef6..83df0f37ba 100644 --- a/arch/x86/kernel/traps_32.c +++ b/arch/x86/kernel/traps_32.c @@ -352,6 +352,45 @@ int is_valid_bugaddr(unsigned long ip) return ud2 == 0x0b0f; } +static int die_counter; + +int __kprobes __die(const char * str, struct pt_regs * regs, long err) +{ + unsigned long sp; + unsigned short ss; + + printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter); +#ifdef CONFIG_PREEMPT + printk("PREEMPT "); +#endif +#ifdef CONFIG_SMP + printk("SMP "); +#endif +#ifdef CONFIG_DEBUG_PAGEALLOC + printk("DEBUG_PAGEALLOC"); +#endif + printk("\n"); + + if (notify_die(DIE_OOPS, str, regs, err, + current->thread.trap_no, SIGSEGV) != + NOTIFY_STOP) { + show_registers(regs); + /* Executive summary in case the oops scrolled away */ + sp = (unsigned long) (®s->sp); + savesegment(ss, ss); + if (user_mode(regs)) { + sp = regs->sp; + ss = regs->ss & 0xffff; + } + printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip); + print_symbol("%s", regs->ip); + printk(" SS:ESP %04x:%08lx\n", ss, sp); + return 0; + } else { + return 1; + } +} + /* * This is gone through when something in the kernel has done something bad and * is about to be terminated. @@ -367,7 +406,6 @@ void die(const char * str, struct pt_regs * regs, long err) .lock_owner = -1, .lock_owner_depth = 0 }; - static int die_counter; unsigned long flags; oops_enter(); @@ -383,43 +421,13 @@ void die(const char * str, struct pt_regs * regs, long err) raw_local_irq_save(flags); if (++die.lock_owner_depth < 3) { - unsigned long sp; - unsigned short ss; - report_bug(regs->ip, regs); - printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, - ++die_counter); -#ifdef CONFIG_PREEMPT - printk("PREEMPT "); -#endif -#ifdef CONFIG_SMP - printk("SMP "); -#endif -#ifdef CONFIG_DEBUG_PAGEALLOC - printk("DEBUG_PAGEALLOC"); -#endif - printk("\n"); - - if (notify_die(DIE_OOPS, str, regs, err, - current->thread.trap_no, SIGSEGV) != - NOTIFY_STOP) { - show_registers(regs); - /* Executive summary in case the oops scrolled away */ - sp = (unsigned long) (®s->sp); - savesegment(ss, ss); - if (user_mode(regs)) { - sp = regs->sp; - ss = regs->ss & 0xffff; - } - printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip); - print_symbol("%s", regs->ip); - printk(" SS:ESP %04x:%08lx\n", ss, sp); - } - else + if (__die(str, regs, err)) regs = NULL; - } else + } else { printk(KERN_EMERG "Recursive die() failure, output suppressed\n"); + } bust_spinlocks(0); die.lock_owner = -1; -- 2.39.5