Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760820AbYHDGsk (ORCPT ); Mon, 4 Aug 2008 02:48:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754717AbYHDGsc (ORCPT ); Mon, 4 Aug 2008 02:48:32 -0400 Received: from 166-70-238-42.ip.xmission.com ([166.70.238.42]:48519 "EHLO ns1.wolfmountaingroup.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753078AbYHDGsc (ORCPT ); Mon, 4 Aug 2008 02:48:32 -0400 Message-ID: <51617.166.70.238.45.1217831286.squirrel@webmail.wolfmountaingroup.com> Date: Mon, 4 Aug 2008 00:28:06 -0600 (MDT) Subject: [PATCH 2.6.27-rc1 2/25] mdb: Merkey's Kernel Debugger 2.6.27-rc1 From: jmerkey@wolfmountaingroup.com To: linux-kernel@vger.kernel.org User-Agent: SquirrelMail/1.4.6 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Priority: 3 (Normal) Importance: Normal Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3688 Lines: 135 Netware style debugger for Linux written by Jeffrey Vernon Merkey --- a/arch/x86/kernel/traps_32.c 2008-08-03 16:09:54.000000000 -0600 +++ b/arch/x86/kernel/traps_32.c 2008-08-03 17:33:06.000000000 -0600 @@ -46,6 +46,16 @@ #include #endif +#ifdef CONFIG_MDB +#define DEBUGGER_EXCEPTION 1 +#define NMI_EXCEPTION 2 +#define BREAKPOINT_EXCEPTION 3 +#define SOFTWARE_EXCEPTION 22 + +extern unsigned char *mdb_oops; +extern int mdb(int reason, int error, void *frame); +#endif + #include #include #include @@ -452,8 +462,15 @@ */ void die(const char *str, struct pt_regs *regs, long err) { - unsigned long flags = oops_begin(); +#ifdef CONFIG_MDB + unsigned long flags; + mdb_oops = (unsigned char *)str; + mdb(SOFTWARE_EXCEPTION, err, regs); + flags = oops_begin(); +#else + unsigned long flags = oops_begin(); +#endif if (die_nest_count < 3) { report_bug(regs->ip, regs); @@ -573,7 +590,7 @@ } DO_VM86_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip) -#ifndef CONFIG_KPROBES +#if !defined(CONFIG_KPROBES) && !defined(CONFIG_MDB) DO_VM86_ERROR(3, SIGTRAP, "int3", int3) #endif DO_VM86_ERROR(4, SIGSEGV, "overflow", overflow) @@ -718,6 +735,9 @@ { if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP) return; +#ifdef CONFIG_MDB + mdb(NMI_EXCEPTION, reason, regs); // nmi is code 2 +#endif #ifdef CONFIG_MCA /* * Might actually be able to figure out what the guilty party @@ -756,6 +776,9 @@ printk(" on CPU%d, ip %08lx, registers:\n", smp_processor_id(), regs->ip); show_registers(regs); +#ifdef CONFIG_MDB + mdb(NMI_EXCEPTION, 0, regs); // nmi is code 2 +#endif if (do_panic) panic("Non maskable interrupt"); console_silent(); @@ -785,6 +808,10 @@ if (!cpu) reason = get_nmi_reason(); +#if defined(CONFIG_SMP) && defined(CONFIG_MDB) + if (mdb(NMI_EXCEPTION, 0, regs)) + return; +#endif if (!(reason & 0xc0)) { if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT) == NOTIFY_STOP) @@ -850,6 +877,10 @@ #ifdef CONFIG_KPROBES void __kprobes do_int3(struct pt_regs *regs, long error_code) { +#ifdef CONFIG_MDB + if (mdb(BREAKPOINT_EXCEPTION, error_code, regs)) + return; +#endif trace_hardirqs_fixup(); if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP) @@ -865,6 +896,16 @@ } #endif +#if defined(CONFIG_MDB) && !defined(CONFIG_KPROBES) +fastcall void do_int3(struct pt_regs * regs, long error_code) +{ +#ifdef CONFIG_MDB + if (mdb(BREAKPOINT_EXCEPTION, error_code, regs)) + return; +#endif + do_trap(3, SIGTRAP, "int3", 1, regs, error_code, NULL); +} +#endif /* CONFIG_KDB && !CONFIG_KPROBES */ /* * Our handling of the processor debug registers is non-trivial. * We do not clear them on entry and exit from the kernel. Therefore @@ -895,6 +936,10 @@ trace_hardirqs_fixup(); get_debugreg(condition, 6); +#ifdef CONFIG_MDB + if (mdb(DEBUGGER_EXCEPTION, error_code, regs)) + return; +#endif /* * The processor cleared BTF, so don't mark that we need it set. By making a contribution to this project, I certify that the contribution was created in whole or in part by me and I have the right to submit it under the open source license indicated in the file. Jeffrey Vernon Merkey -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/