Messages in this thread Patch in this message | | | 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@wolfmoun ... |
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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 <linux/edac.h> #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 <asm/arch_hooks.h> #include <asm/stacktrace.h> #include <asm/processor.h> @@ -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
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