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Message-Id: <200808160341.m7G3fkHK022558@wolfmountaingroup.com>
Date: Fri, 15 Aug 2008 21:41:46 -0600
From: jmerkey@...fmountaingroup.com
To: linux-kernel@...r.kernel.org
Subject: [PATCH 2.6.27-rc3 12/28] mdb: add alternate debugger, accelerator, and keystroke command registry
added the command registry for registering debugger and accelerator
keystroke commands.
Signed-off-by: Jeffrey Vernon Merkey (jmerkey@...fmountaingroup.com)
--- a/debug/mdb/mdb-list.c 1969-12-31 17:00:00.000000000 -0700
+++ b/debug/mdb/mdb-list.c 2008-08-15 15:41:57.000000000 -0600
@@ -0,0 +1,628 @@
+
+/***************************************************************************
+*
+* 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 Linux Debugger
+*
+***************************************************************************/
+
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+#include <linux/moduleparam.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 <linux/uaccess.h>
+#include <asm/system.h>
+#include <asm/segment.h>
+#include <asm/atomic.h>
+#include <asm/msr.h>
+#include <linux/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 MDB_ATOMIC
+static spinlock_t accelLock = SPIN_LOCK_UNLOCKED;
+static long accelflags;
+#endif
+
+ACCELERATOR *accelHead;
+ACCELERATOR *accelTail;
+
+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;
+#endif
+
+ALT_DEBUGGER *altDebugHead;
+ALT_DEBUGGER *altDebugTail;
+
+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;
+#endif
+
+DEBUGGER_PARSER *debugParserHead;
+DEBUGGER_PARSER *debugParserTail;
+
+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;
+}
--
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