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Message-Id: <200808050626.m756QaGC003770@wolfmountaingroup.com>
Date: Tue, 5 Aug 2008 00:26:36 -0600
From: jmerkey@...fmountaingroup.com
To: linux-kernel@...r.kernel.org
Subject: [PATCH 2.6.27-rc1-git5 13/26] mdb: enable alternate debugger support
Centralized external definitions into include files and corrected
the file to conform to Linux coding practices. fixed word wrap
problems with patches.
enable alternate debugger interface.
Signed-off-by: Jeffrey Vernon Merkey (jmerkey@...fmountaingroup.com)
--- a/debug/mdb-list.c 1969-12-31 17:00:00.000000000 -0700
+++ b/debug/mdb-list.c 2008-08-04 15:49:51.000000000 -0600
@@ -0,0 +1,631 @@
+
+/***************************************************************************
+*
+* Copyright (c) 2008 Jeff V. Merkey All Rights Reserved.
+* 1058 East 50 South
+* Lindon, Utah 84042
+* jmerkey@...fmountaingroup.com
+*
+* This program is free software; you can redistribute it and/or modify it
+* under the terms of the GNU General Public License as published by the
+* Free Software Foundation, version 2.
+*
+* This program is distributed in the hope that it will be useful, but
+* WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+* General Public License for more details.
+*
+* You are free to modify and re-distribute this program in accordance
+* with the terms specified in the GNU Public License. The copyright
+* contained in this code is required to be present in any derivative
+* works and you are required to provide the source code for this
+* program as part of any commercial or non-commercial distribution.
+* You are required to respect the rights of the Copyright holders
+* named within this code.
+*
+* jmerkey@...fmountaingroup.com is the official maintainer of
+* this code. You are encouraged to report any bugs, problems, fixes,
+* suggestions, and comments about this software.
+*
+* AUTHOR : Jeff V. Merkey
+* DESCRIP : Merkey's NetWare Debugger
+*
+***************************************************************************/
+
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/genhd.h>
+#include <linux/hdreg.h>
+#include <linux/fs.h>
+#include <linux/major.h>
+#include <linux/mm.h>
+#include <linux/cdrom.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/ctype.h>
+#include <linux/keyboard.h>
+#include <linux/console.h>
+#include <linux/serial_reg.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/segment.h>
+#include <asm/atomic.h>
+#include <asm/msr.h>
+#include <asm/io.h>
+
+#ifdef CONFIG_SMP
+#include <mach_apic.h>
+#include <mach_ipi.h>
+#endif
+
+#define __KERNEL_SYSCALLS__
+#include <linux/unistd.h>
+#include <linux/kallsyms.h>
+
+#include "mdb.h"
+#include "mdb-ia32.h"
+#include "mdb-list.h"
+#include "mdb-ia32-proc.h"
+#include "mdb-base.h"
+#include "mdb-proc.h"
+#include "mdb-os.h"
+#include "mdb-keyboard.h"
+
+#ifdef CONFIG_MDB
+
+#ifdef MDB_ATOMIC
+static spinlock_t accelLock = SPIN_LOCK_UNLOCKED;
+static long accelflags = 0;
+#endif
+
+ACCELERATOR *accelHead = 0;
+ACCELERATOR *accelTail = 0;
+
+unsigned long AccelRoutine(unsigned long key, void *p)
+{
+ register ACCELERATOR *accel;
+ unsigned long retCode;
+
+ accel = accelHead;
+ while (accel)
+ {
+ if (accel->accelFlags && accel->accelRoutine && accel->key == key)
+ {
+ retCode = (accel->accelRoutine)(key, p, accel);
+ return retCode;
+ }
+ accel = accel->accelNext;
+ }
+ return 0;
+}
+
+void ShowDebuggerAccelerators(void)
+{
+ register ACCELERATOR *accel;
+
+ DBGPrint("\nDebugger Keystroke Accelerator(s)\n");
+
+ accel = accelHead;
+ while (accel)
+ {
+ if (accel->shortHelp)
+ if (DBGPrint("%s\n", accel->shortHelp)) return;
+ accel = accel->accelNext;
+ }
+ return;
+}
+
+unsigned long IsAccelerator(unsigned long key)
+{
+ register ACCELERATOR *accel;
+
+ accel = accelHead;
+ while (accel)
+ {
+ if (accel->accelFlags && accel->accelRoutine && accel->key == key)
+ {
+ return 1;
+ }
+ accel = accel->accelNext;
+ }
+ return 0;
+}
+
+unsigned long AccelHelpRoutine(unsigned long key)
+{
+ register ACCELERATOR *accel;
+
+ accel = accelHead;
+ if (key) // if we were passed a command string
+ {
+ while (accel)
+ {
+ if (accel->accelFlags && accel->key == key)
+ {
+ if (accel->accelRoutineHelp)
+ {
+ DBGPrint("Accelerator %08X\n", (unsigned)accel->key);
+ (accel->accelRoutineHelp)(key, accel);
+ return 1;
+ }
+ DBGPrint("Accelerator %08X\n", (unsigned)accel->key);
+ return 1;
+ }
+ accel = accel->accelNext;
+ }
+ DBGPrint("Help for Accelerator [%08X] not found\n", (unsigned)key);
+ return 1;
+ }
+ else
+ {
+ DBGPrint("Accelerator(s)\n");
+ while (accel)
+ {
+ if (accel->accelFlags && accel->key && !accel->supervisorCommand)
+ DBGPrint("%08X - %s\n",
+ (unsigned)accel->key, accel->shortHelp);
+ accel = accel->accelNext;
+ }
+ }
+ return 0;
+}
+
+ACCELERATOR *insertAccel(ACCELERATOR *i, ACCELERATOR *top)
+{
+ ACCELERATOR *old, *p;
+
+ if (!accelTail)
+ {
+ i->accelNext = i->accelPrior = NULL;
+ accelTail = i;
+ return i;
+ }
+ p = top;
+ old = NULL;
+ while (p)
+ {
+ if (p->key < i->key)
+ {
+ old = p;
+ p = p->accelNext;
+ }
+ else
+ {
+ if (p->accelPrior)
+ {
+ p->accelPrior->accelNext = i;
+ i->accelNext = p;
+ i->accelPrior = p->accelPrior;
+ p->accelPrior = i;
+ return top;
+ }
+ i->accelNext = p;
+ i->accelPrior = NULL;
+ p->accelPrior = i;
+ return i;
+ }
+ }
+ old->accelNext = i;
+ i->accelNext = NULL;
+ i->accelPrior = old;
+ accelTail = i;
+ return accelHead;
+
+}
+
+unsigned long AddAccelRoutine(ACCELERATOR *newAccel)
+{
+ register ACCELERATOR *accel;
+
+#ifdef MDB_ATOMIC
+ spin_lock_irqsave(&accelLock, accelflags);
+#endif
+ accel = accelHead;
+ while (accel)
+ {
+ if (accel == newAccel || accel->key == newAccel->key)
+ {
+#ifdef MDB_ATOMIC
+ spin_unlock_irqrestore(&accelLock, accelflags);
+#endif
+ return 1;
+ }
+ accel = accel->accelNext;
+ }
+ newAccel->accelFlags = -1;
+ accelHead = insertAccel(newAccel, accelHead);
+
+#ifdef MDB_ATOMIC
+ spin_unlock_irqrestore(&accelLock, accelflags);
+#endif
+ return 0;
+}
+
+unsigned long RemoveAccelRoutine(ACCELERATOR *newAccel)
+{
+ register ACCELERATOR *accel;
+
+#ifdef MDB_ATOMIC
+ spin_lock_irqsave(&accelLock, accelflags);
+#endif
+ accel = accelHead;
+ while (accel)
+ {
+ if (accel == newAccel) // found, remove from list
+ {
+ if (accelHead == newAccel)
+ {
+ accelHead = (void *) newAccel->accelNext;
+ if (accelHead)
+ accelHead->accelPrior = NULL;
+ else
+ accelTail = NULL;
+ }
+ else
+ {
+ newAccel->accelPrior->accelNext = newAccel->accelNext;
+ if (newAccel != accelTail)
+ newAccel->accelNext->accelPrior = newAccel->accelPrior;
+ else
+ accelTail = newAccel->accelPrior;
+ }
+ newAccel->accelNext = newAccel->accelPrior = 0;
+ newAccel->accelFlags = 0;
+
+#ifdef MDB_ATOMIC
+ spin_unlock_irqrestore(&accelLock, accelflags);
+#endif
+ return 0;
+ }
+ accel = accel->accelNext;
+ }
+
+#ifdef MDB_ATOMIC
+ spin_unlock_irqrestore(&accelLock, accelflags);
+#endif
+ return -1;
+}
+
+#ifdef MDB_ATOMIC
+static spinlock_t altDebugLock = SPIN_LOCK_UNLOCKED;
+static long altflags = 0;
+#endif
+
+ALT_DEBUGGER *altDebugHead = 0;
+ALT_DEBUGGER *altDebugTail = 0;
+
+int AlternateDebuggerRoutine(int reason, int error, void *frame)
+{
+ register ALT_DEBUGGER *altDebug;
+ register unsigned long retCode;
+ unsigned long state;
+
+ state = save_flags();
+ altDebug = altDebugHead;
+ while (altDebug)
+ {
+ if (altDebug->AlternateDebugger)
+ {
+ retCode = (altDebug->AlternateDebugger)(reason, error, frame);
+ if (retCode)
+ {
+ restore_flags(state);
+ return retCode;
+ }
+ }
+ altDebug = altDebug->altDebugNext;
+ }
+ restore_flags(state);
+ return 0;
+}
+
+unsigned long AddAlternateDebugger(ALT_DEBUGGER *Debugger)
+{
+ register ALT_DEBUGGER *altDebug;
+
+#ifdef MDB_ATOMIC
+ spin_lock_irqsave(&altDebugLock, altflags);
+#endif
+ altDebug = altDebugHead;
+ while (altDebug)
+ {
+ if (altDebug == Debugger)
+ {
+#ifdef MDB_ATOMIC
+ spin_unlock_irqrestore(&altDebugLock, altflags);
+#endif
+ return 1;
+ }
+ altDebug = altDebug->altDebugNext;
+ }
+ if (!altDebugHead)
+ {
+ altDebugHead = Debugger;
+ altDebugTail = Debugger;
+ Debugger->altDebugNext = 0;
+ Debugger->altDebugPrior = 0;
+ }
+ else
+ {
+ altDebugTail->altDebugNext = Debugger;
+ Debugger->altDebugNext = 0;
+ Debugger->altDebugPrior = altDebugTail;
+ altDebugTail = Debugger;
+ }
+
+#ifdef MDB_ATOMIC
+ spin_unlock_irqrestore(&altDebugLock, altflags);
+#endif
+ return 0;
+}
+
+unsigned long RemoveAlternateDebugger(ALT_DEBUGGER *Debugger)
+{
+ register ALT_DEBUGGER *altDebug;
+
+#ifdef MDB_ATOMIC
+ spin_lock_irqsave(&altDebugLock, altflags);
+#endif
+ altDebug = altDebugHead;
+ while (altDebug)
+ {
+ if (altDebug == Debugger) // found, remove from list
+ {
+ if (altDebugHead == Debugger)
+ {
+ altDebugHead = (void *) Debugger->altDebugNext;
+ if (altDebugHead)
+ altDebugHead->altDebugPrior = NULL;
+ else
+ altDebugTail = NULL;
+ }
+ else
+ {
+ Debugger->altDebugPrior->altDebugNext = Debugger->altDebugNext;
+ if (Debugger != altDebugTail)
+ Debugger->altDebugNext->altDebugPrior = Debugger->altDebugPrior;
+ else
+ altDebugTail = Debugger->altDebugPrior;
+ }
+ Debugger->altDebugNext = Debugger->altDebugPrior = 0;
+
+#ifdef MDB_ATOMIC
+ spin_unlock_irqrestore(&altDebugLock, altflags);
+#endif
+ return 0;
+ }
+ altDebug = altDebug->altDebugNext;
+ }
+#ifdef MDB_ATOMIC
+ spin_unlock_irqrestore(&altDebugLock, altflags);
+#endif
+ return -1;
+}
+
+#ifdef MDB_ATOMIC
+static spinlock_t debugParserLock = SPIN_LOCK_UNLOCKED;
+static long parserflags = 0;
+#endif
+
+DEBUGGER_PARSER *debugParserHead = 0;
+DEBUGGER_PARSER *debugParserTail = 0;
+
+unsigned long DebuggerParserRoutine(unsigned char *command, unsigned char *commandLine,
+ StackFrame *stackFrame, unsigned long Exception)
+{
+ register DEBUGGER_PARSER *debugParser;
+ register unsigned long retCode, valid = 0;
+ register unsigned char *p;
+
+ p = commandLine;
+ if (!p)
+ return 0;
+
+ // if a passed string is just whitespace, return error
+ while (*p)
+ {
+ if ((*p != ' ') && (*p != '\n') && (*p != '\r'))
+ {
+ valid = 1;
+ break;
+ }
+ p++;
+ }
+ if (!valid)
+ return 0;
+
+ debugParser = debugParserHead;
+ while (debugParser)
+ {
+ if (debugParser->parserFlags && debugParser->DebugCommandParser &&
+ strlen(debugParser->debugCommandName) == strlen(command) &&
+ (!strcmp(debugParser->debugCommandName, UpcaseString(command))))
+ {
+ retCode = (debugParser->DebugCommandParser)(commandLine, stackFrame,
+ Exception, debugParser);
+ if (retCode)
+ return retCode;
+ }
+ debugParser = debugParser->debugNext;
+ }
+ DBGPrint("unknown mdb command -> %s\n", command);
+ return 0;
+}
+
+unsigned long DebuggerParserHelpRoutine(unsigned char *command, unsigned char *commandLine)
+{
+ extern void ShowDebuggerAccelerators(void);
+ register DEBUGGER_PARSER *debugParser;
+
+ debugParser = debugParserHead;
+ if (*command) // if we were passed a command string
+ {
+ while (debugParser)
+ {
+ if (debugParser->parserFlags &&
+ strlen(debugParser->debugCommandName) == strlen(command) &&
+ !strcmp(debugParser->debugCommandName, UpcaseString(command)))
+ {
+ if (debugParser->DebugCommandParserHelp)
+ {
+ DBGPrint("Help for Command %s\n",
+ debugParser->debugCommandName);
+ (debugParser->DebugCommandParserHelp)(commandLine, debugParser);
+ return 1;
+ }
+ DBGPrint("Help for Command %s\n", debugParser->debugCommandName);
+ return 1;
+ }
+ debugParser = debugParser->debugNext;
+ }
+ DBGPrint("Help for Command [%s] not found\n", command);
+ return 1;
+ }
+ else
+ {
+ DBGPrint("Debugger Command(s)\n");
+ while (debugParser)
+ {
+ if (debugParser->parserFlags && debugParser->debugCommandName &&
+ !debugParser->supervisorCommand)
+ if (DBGPrint("%15s - %s\n", debugParser->debugCommandName,
+ debugParser->shortHelp)) return 0;
+ debugParser = debugParser->debugNext;
+ }
+ ShowDebuggerAccelerators();
+ }
+ return 0;
+}
+
+DEBUGGER_PARSER *insertDebuggerParser(DEBUGGER_PARSER *i, DEBUGGER_PARSER *top)
+{
+ DEBUGGER_PARSER *old, *p;
+
+ if (!debugParserTail)
+ {
+ i->debugNext = i->debugPrior = NULL;
+ debugParserTail = i;
+ return i;
+ }
+ p = top;
+ old = NULL;
+ while (p)
+ {
+ if (strcmp(p->debugCommandName, i->debugCommandName) < 0)
+ {
+ old = p;
+ p = p->debugNext;
+ }
+ else
+ {
+ if (p->debugPrior)
+ {
+ p->debugPrior->debugNext = i;
+ i->debugNext = p;
+ i->debugPrior = p->debugPrior;
+ p->debugPrior = i;
+ return top;
+ }
+ i->debugNext = p;
+ i->debugPrior = NULL;
+ p->debugPrior = i;
+ return i;
+ }
+ }
+ old->debugNext = i;
+ i->debugNext = NULL;
+ i->debugPrior = old;
+ debugParserTail = i;
+ return debugParserHead;
+
+}
+
+unsigned long AddDebuggerCommandParser(DEBUGGER_PARSER *parser)
+{
+ register DEBUGGER_PARSER *debugParser;
+
+#ifdef MDB_ATOMIC
+ spin_lock_irqsave(&debugParserLock, parserflags);
+#endif
+ debugParser = debugParserHead;
+ while (debugParser)
+ {
+ if (debugParser == parser ||
+ (strlen(parser->debugCommandName) == strlen(debugParser->debugCommandName) &&
+ (!strcmp(parser->debugCommandName, debugParser->debugCommandName))))
+ {
+#ifdef MDB_ATOMIC
+ spin_unlock_irqrestore(&debugParserLock, parserflags);
+#endif
+ return 1;
+ }
+ debugParser = debugParser->debugNext;
+ }
+ parser->parserFlags = -1;
+ parser->debugCommandNameLength = strlen(parser->debugCommandName);
+
+ debugParserHead = insertDebuggerParser(parser, debugParserHead);
+
+#ifdef MDB_ATOMIC
+ spin_unlock_irqrestore(&debugParserLock, parserflags);
+#endif
+ return 0;
+}
+
+unsigned long RemoveDebuggerCommandParser(DEBUGGER_PARSER *parser)
+{
+ register DEBUGGER_PARSER *debugParser;
+
+#ifdef MDB_ATOMIC
+ spin_lock_irqsave(&debugParserLock, parserflags);
+#endif
+ debugParser = debugParserHead;
+ while (debugParser)
+ {
+ if (debugParser == parser) // found, remove from list
+ {
+ if (debugParserHead == parser)
+ {
+ debugParserHead = (void *) parser->debugNext;
+ if (debugParserHead)
+ debugParserHead->debugPrior = NULL;
+ else
+ debugParserTail = NULL;
+ }
+ else
+ {
+ parser->debugPrior->debugNext = parser->debugNext;
+ if (parser != debugParserTail)
+ parser->debugNext->debugPrior = parser->debugPrior;
+ else
+ debugParserTail = parser->debugPrior;
+ }
+ parser->debugNext = parser->debugPrior = 0;
+ parser->parserFlags = 0;
+
+#ifdef MDB_ATOMIC
+ spin_unlock_irqrestore(&debugParserLock, parserflags);
+#endif
+ return 0;
+ }
+ debugParser = debugParser->debugNext;
+ }
+#ifdef MDB_ATOMIC
+ spin_unlock_irqrestore(&debugParserLock, parserflags);
+#endif
+ return -1;
+}
+
+#endif
+
--
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