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Date: Mon, 4 Aug 2008 00:37:39 -0600 (MDT)
From: jmerkey@...fmountaingroup.com
To: linux-kernel@...r.kernel.org
Subject: [PATCH 2.6.27-rc1 16/25] mdb: Merkey's Kernel Debugger 2.6.27-rc1
Netware style debugger for Linux written by Jeffrey Vernon Merkey
--- a/debug/mdb-os.c 1969-12-31 17:00:00.000000000 -0700
+++ b/debug/mdb-os.c 2008-08-03 16:15:00.000000000 -0600
@@ -0,0 +1,1051 @@
+
+/***************************************************************************
+*
+* 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 3.
+*
+* 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
+* FILE : MDB-OS.C
+* DESCRIP : Merkey's NetWare Debugger
+* DATE : April 8, 2008
+*
+***************************************************************************/
+
+#include "mdb.h"
+
+#ifdef CONFIG_MDB
+
+// module symbol workspace
+BYTE symbuf[MAX_PROCESSORS][MAX_SYMBOL_LEN];
+BYTE modbuf[MAX_PROCESSORS][MAX_SYMBOL_LEN];
+BYTE workbuf[MAX_PROCESSORS][MAX_SYMBOL_LEN];
+BYTE traceBuf[MAX_SYMBOL_LEN];
+
+extern void touch_nmi_watchdog(void);
+
+int valid_stack_ptr(struct thread_info *tinfo, void *p)
+{
+ return ((p > (void *)tinfo) && (p < (void *)(tinfo + THREAD_SIZE - 3)));
+}
+
+unsigned long print_context_stack(struct thread_info *tinfo,
+ unsigned long *stack, unsigned long ebp,
+ unsigned long *rebp)
+{
+ register BYTE *symbol;
+ unsigned long addr, offset;
+ BYTE *modname;
+
+#ifdef CONFIG_FRAME_POINTER
+ while (valid_stack_ptr(tinfo, (void *)ebp))
+ {
+ // addr = *(unsigned long *)(ebp + 4);
+ addr = mdb_getword((ebp + 4), 4);
+
+ if (DBGPrint("[<%08lx>] ", addr))
+ return 1;
+
+ symbol = GetSymbolFromValueOffsetModule(addr, &offset, &modname,
+ traceBuf, MAX_SYMBOL_LEN);
+ if (symbol)
+ {
+ if (modname)
+ {
+ if (offset)
+ {
+ if (DBGPrint("%s|%s+0x%X", modname, symbol, offset))
+ return 1;
+ }
+ else
+ {
+ if (DBGPrint("%s|%s", modname, symbol))
+ return 1;
+ }
+ }
+ else
+ {
+ if (offset)
+ {
+ if (DBGPrint("%s+0x%X", symbol, offset))
+ return 1;
+ }
+ else
+ {
+ if (DBGPrint("%s", symbol))
+ return 1;
+ }
+ }
+ }
+ if (DBGPrint("\n"))
+ return 1;
+
+ // if (ebp == *(unsigned long *)ebp)
+ if (ebp == mdb_getword(ebp, 4))
+ break;
+
+ // ebp = *(unsigned long *)ebp;
+ ebp = mdb_getword(ebp, 4);
+ }
+#else
+ while (valid_stack_ptr(tinfo, stack))
+ {
+ addr = mdb_getword((unsigned long)stack, 4);
+ stack++;
+
+ if (__kernel_text_address(addr))
+ {
+ if (DBGPrint("[<%08lx>] ", addr))
+ return 1;
+
+ symbol = GetSymbolFromValueOffsetModule(addr, &offset, &modname,
+ traceBuf, MAX_SYMBOL_LEN);
+ if (symbol)
+ {
+ if (modname)
+ {
+ if (offset)
+ {
+ if (DBGPrint("%s|%s+0x%X", modname, symbol, offset))
+ return 1;
+ }
+ else
+ {
+ if (DBGPrint("%s|%s", modname, symbol))
+ return 1;
+ }
+ }
+ else
+ {
+ if (offset)
+ {
+ if (DBGPrint("%s+0x%X", symbol, offset))
+ return 1;
+ }
+ else
+ {
+ if (DBGPrint("%s", symbol))
+ return 1;
+ }
+ }
+ }
+ if (DBGPrint("\n"))
+ return 1;
+ }
+ }
+#endif
+ if (rebp)
+ *rebp = ebp;
+
+ return 0;
+}
+
+int bt_stack(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack)
+{
+ unsigned long ebp = 0;
+
+ if (!task)
+ task = current;
+
+ if (!stack)
+ {
+ unsigned long dummy;
+
+ stack = &dummy;
+ if (task && task != current)
+ {
+ if (mdb_verify_rw(&task->thread.sp, 4))
+ return 0;
+
+ // stack = (unsigned long *)task->thread.esp;
+ stack = (unsigned long *)
+ mdb_getword((unsigned long)&task->thread.sp, 4);
+ }
+ }
+
+#ifdef CONFIG_FRAME_POINTER
+ if (!ebp)
+ {
+ if (task == current)
+ asm ("movl %%ebp, %0" : "=r" (ebp) : );
+ else
+ {
+ if (mdb_verify_rw(task->thread.sp, 4))
+ return 0;
+
+ // ebp = *(unsigned long *)task->thread.esp;
+ ebp = (unsigned long *)mdb_getword(task->thread.sp, 4);
+ }
+ }
+#endif
+
+ while (1)
+ {
+ struct thread_info *context;
+
+ context = (struct thread_info *)
+ ((unsigned long)stack & (~(THREAD_SIZE - 1)));
+
+ if (mdb_verify_rw(context, 4))
+ return 0;
+
+ if (print_context_stack(context, stack, ebp, &ebp))
+ return 1;
+
+ if (mdb_verify_rw(&context->previous_esp, 4))
+ return 0;
+
+ // stack = (unsigned long *)context->previous_esp;
+ stack = (unsigned long *)
+ mdb_getword((unsigned long)&context->previous_esp, 4);
+ if (!stack)
+ break;
+
+ touch_nmi_watchdog();
+ }
+ return 0;
+}
+
+unsigned char *mdbprompt = "--- More (Q to Quit) ---";
+int nextline = 0;
+
+int mdb_printf(char *fmt, ...)
+{
+ char buffer[256];
+ char keystroke[16];
+ va_list ap;
+ int linecount;
+ struct console *con;
+// struct console *c = console_drivers;
+
+ preempt_disable();
+
+ linecount = 23;
+
+ va_start(ap, fmt);
+ vsprintf(buffer, fmt, ap);
+ va_end(ap);
+
+ for (con = console_drivers; con; con = con->next)
+ {
+ if ((con->flags & CON_ENABLED) && con->write &&
+ (cpu_online(smp_processor_id()) ||
+ (con->flags & CON_ANYTIME)))
+ con->write(con, buffer, strlen(buffer));
+ }
+
+// while (c)
+// {
+// c->write(c, buffer, strlen(buffer));
+// c = c->next;
+// }
+
+ if (strchr(buffer, '\n') != NULL)
+ nextline++;
+
+ if (nextline == linecount)
+ {
+ nextline = 0;
+
+ for (con = console_drivers; con; con = con->next)
+ {
+ if ((con->flags & CON_ENABLED) && con->write &&
+ (cpu_online(smp_processor_id()) ||
+ (con->flags & CON_ANYTIME)))
+ con->write(con, mdbprompt, strlen(mdbprompt));
+ }
+
+// c = console_drivers;
+// while (c)
+// {
+// c->write(c, mdbprompt, strlen(mdbprompt));
+// c = c->next;
+// }
+
+ keystroke[0] = (char)mdb_getkey();
+ nextline = 1;
+
+ if ((keystroke[0] == 'q') || (keystroke[0] == 'Q'))
+ {
+ for (con = console_drivers; con; con = con->next)
+ {
+ if ((con->flags & CON_ENABLED) && con->write &&
+ (cpu_online(smp_processor_id()) ||
+ (con->flags & CON_ANYTIME)))
+ con->write(con, "\n", 1);
+ }
+
+// c = console_drivers;
+// while (c)
+// {
+// c->write(c, "\n", 1);
+// c = c->next;
+// }
+
+ preempt_enable();
+ return 1;
+ }
+ }
+ preempt_enable();
+ return 0;
+}
+
+
+int mdb_serial_port = 0;
+
+int get_modem_char(void)
+{
+ unsigned char ch;
+ int status;
+
+ if (mdb_serial_port == 0)
+ return -1;
+
+ if ((status = inb(mdb_serial_port + UART_LSR)) & UART_LSR_DR)
+ {
+ ch = inb(mdb_serial_port + UART_RX);
+ switch (ch)
+ {
+ case 0x7f:
+ ch = 8;
+ break;
+
+ case '\t':
+ ch = ' ';
+ break;
+
+ case 8: // backspace
+ break;
+
+ case 13: // enter
+ mdb_printf("\n");
+ break;
+
+ default:
+ if (!isprint(ch))
+ return(-1);
+ mdb_printf("%c", ch);
+ break;
+ }
+ return ch;
+ }
+ return -1;
+}
+
+int mdb_suppress_crlf = 0;
+static int get_kbd_char(void)
+{
+ int scancode, scanstatus;
+ static int shift_lock; /* CAPS LOCK state (0-off, 1-on) */
+ static int shift_key; /* Shift next keypress */
+ static int ctrl_key;
+ u_short keychar;
+ extern u_short plain_map[], shift_map[], ctrl_map[];
+
+ if ((inb(KBD_STATUS_REG) & KBD_STAT_OBF) == 0)
+ return -1;
+
+ /*
+ * Fetch the scancode
+ */
+ scancode = inb(KBD_DATA_REG);
+ scanstatus = inb(KBD_STATUS_REG);
+
+ /*
+ * Ignore mouse events.
+ */
+ if (scanstatus & KBD_STAT_MOUSE_OBF)
+ return -1;
+
+ /*
+ * Ignore release, trigger on make
+ * (except for shift keys, where we want to
+ * keep the shift state so long as the key is
+ * held down).
+ */
+
+ if (((scancode & 0x7f) == 0x2a) ||
+ ((scancode & 0x7f) == 0x36))
+ {
+ /*
+ * Next key may use shift table
+ */
+ if ((scancode & 0x80) == 0) {
+ shift_key=1;
+ } else {
+ shift_key=0;
+ }
+ return -1;
+ }
+
+ if ((scancode & 0x7f) == 0x1d) {
+ /*
+ * Left ctrl key
+ */
+ if ((scancode & 0x80) == 0) {
+ ctrl_key = 1;
+ } else {
+ ctrl_key = 0;
+ }
+ return -1;
+ }
+
+ if ((scancode & 0x80) != 0)
+ return -1;
+
+ scancode &= 0x7f;
+
+ /*
+ * Translate scancode
+ */
+
+ if (scancode == 0x3a) {
+ /*
+ * Toggle caps lock
+ */
+ shift_lock ^= 1;
+ return -1;
+ }
+
+ if (scancode == 0x0e) {
+ /*
+ * Backspace
+ */
+ return 8;
+ }
+
+ if (scancode == 0xe0) {
+ return -1;
+ }
+
+ /*
+ * For Japanese 86/106 keyboards
+ * See comment in drivers/char/pc_keyb.c.
+ * - Masahiro Adegawa
+ */
+ if (scancode == 0x73) {
+ scancode = 0x59;
+ } else if (scancode == 0x7d) {
+ scancode = 0x7c;
+ }
+
+ if (!shift_lock && !shift_key && !ctrl_key) {
+ keychar = plain_map[scancode];
+ } else if (shift_lock || shift_key) {
+ keychar = shift_map[scancode];
+ } else if (ctrl_key) {
+ keychar = ctrl_map[scancode];
+ } else {
+ keychar = 0x0020;
+ mdb_printf("Unknown state/scancode (%d)\n", scancode);
+ }
+
+ keychar &= 0x0fff;
+ if (keychar == '\t')
+ keychar = ' ';
+
+ switch (keychar)
+ {
+ case K_F1:
+ case K_F2:
+ case K_F3:
+ case K_F4:
+ case K_F5:
+ case K_F6:
+ case K_F7:
+ case K_F8:
+ case K_F9:
+ case K_F10:
+ case K_F11:
+ case K_F12:
+ return keychar;
+ default:
+ break;
+ }
+
+ switch (KTYP(keychar))
+ {
+ case KT_LETTER:
+ case KT_LATIN:
+ if (isprint(keychar))
+ break; /* printable characters */
+ /* drop through */
+ case KT_SPEC:
+ if (keychar == K_ENTER)
+ break;
+ /* drop through */
+ case KT_PAD:
+ switch (keychar)
+ {
+ case K_P0:
+ case K_P1:
+ case K_P2:
+ case K_P4:
+ case K_P6:
+ case K_P7:
+ case K_P8:
+ case K_PDOT:
+ return keychar;
+ }
+ return -1;
+
+ case KT_CUR:
+ switch (keychar)
+ {
+ case K_DOWN:
+ case K_LEFT:
+ case K_RIGHT:
+ case K_UP:
+ return keychar;
+ }
+ return -1;
+
+ default:
+ return(-1); /* ignore unprintables */
+ }
+
+ if ((scancode & 0x7f) == 0x1c) {
+ /*
+ * enter key. All done. Absorb the release scancode.
+ */
+ while ((inb(KBD_STATUS_REG) & KBD_STAT_OBF) == 0)
+ ;
+
+ /*
+ * Fetch the scancode
+ */
+ scancode = inb(KBD_DATA_REG);
+ scanstatus = inb(KBD_STATUS_REG);
+
+ while (scanstatus & KBD_STAT_MOUSE_OBF)
+ {
+ scancode = inb(KBD_DATA_REG);
+ scanstatus = inb(KBD_STATUS_REG);
+ }
+
+ // enter-release error
+ if (scancode != 0x9c) {} ;
+
+ if (!mdb_suppress_crlf)
+ mdb_printf("\n");
+ return 13;
+ }
+
+ /*
+ * echo the character.
+ */
+ mdb_printf("%c", keychar & 0xff);
+ return keychar & 0xff;
+}
+
+int mdb_getkey(void)
+{
+ int key = -1;
+
+ for (;;)
+ {
+ key = get_kbd_char();
+ if (key != -1)
+ break;
+
+ touch_nmi_watchdog();
+ }
+ return key;
+}
+
+int mdb_copy(void *to, void *from, size_t size)
+{
+ return __copy_to_user_inatomic(to, from, size);
+}
+
+int mdb_verify_rw(void *addr, size_t size)
+{
+ unsigned char data[size];
+ return (mdb_copy(data, addr, size));
+}
+
+int mdb_getlword(unsigned long *word, unsigned long addr, size_t size)
+{
+ int err;
+
+ __u8 w1;
+ __u16 w2;
+ __u32 w4;
+ __u64 w8;
+
+ *word = 0; /* Default value if addr or size is invalid */
+ switch (size) {
+ case 1:
+ if (!(err = mdb_copy(&w1, (void *)addr, size)))
+ *word = w1;
+ break;
+ case 2:
+ if (!(err = mdb_copy(&w2, (void *)addr, size)))
+ *word = w2;
+ break;
+ case 4:
+ if (!(err = mdb_copy(&w4, (void *)addr, size)))
+ *word = w4;
+ break;
+ case 8:
+ if (size <= sizeof(*word))
+ {
+ if (!(err = mdb_copy(&w8, (void *)addr, size)))
+ *word = w8;
+ break;
+ }
+ default:
+ err = -EFAULT;
+ }
+ return (err);
+}
+
+int mdb_putword(unsigned long addr, unsigned long word, size_t size)
+{
+ int err;
+ __u8 w1;
+ __u16 w2;
+ __u32 w4;
+ __u64 w8;
+
+ switch (size) {
+ case 1:
+ w1 = word;
+ err = mdb_copy((void *)addr, &w1, size);
+ break;
+ case 2:
+ w2 = word;
+ err = mdb_copy((void *)addr, &w2, size);
+ break;
+ case 4:
+ w4 = word;
+ err = mdb_copy((void *)addr, &w4, size);
+ break;
+ case 8:
+ if (size <= sizeof(word))
+ {
+ w8 = word;
+ err = mdb_copy((void *)addr, &w8, size);
+ break;
+ }
+ default:
+ err = -EFAULT;
+ }
+ return (err);
+}
+
+unsigned long mdb_getword(unsigned long addr, size_t size)
+{
+ unsigned long data = 0;
+ register int ret;
+
+ ret = mdb_getlword(&data, addr, size);
+ if (ret)
+ return 0;
+
+ return data;
+}
+
+int DisplayClosestSymbol(ULONG address)
+{
+ char *modname;
+ const char *name;
+ unsigned long offset = 0, size;
+ char namebuf[KSYM_NAME_LEN+1];
+
+ name = kallsyms_lookup(address, &size, &offset, &modname, namebuf);
+ if (!name)
+ return -1;
+
+ if (modname)
+ {
+ if (offset)
+ DBGPrint("%s|%s+0x%X\n", modname, name, offset);
+ else
+ DBGPrint("%s|%s\n", modname, name);
+ }
+ else
+ {
+ if (offset)
+ DBGPrint("%s+0x%X\n", name, offset);
+ else
+ DBGPrint("%s\n", name);
+ }
+ return 0;
+}
+
+void DumpOSSymbolTableMatch(BYTE *symbol)
+{
+ mdb_kallsyms(symbol, mdb_printf);
+ return;
+}
+
+ULONG GetValueFromSymbol(BYTE *symbol)
+{
+ return ((ULONG)kallsyms_lookup_name(symbol));
+}
+
+
+BYTE *GetModuleInfoFromSymbolValue(ULONG value, BYTE *buf, ULONG len)
+{
+ char *modname;
+ const char *name;
+ unsigned long offset, size;
+ char namebuf[KSYM_NAME_LEN+1];
+
+ name = kallsyms_lookup(value, &size, &offset, &modname, namebuf);
+ if (modname && buf)
+ {
+ strncpy(buf, modname, len);
+ return (BYTE *)buf;
+ }
+ return NULL;
+}
+
+BYTE *GetSymbolFromValue(ULONG value, BYTE *buf, ULONG len)
+{
+ char *modname;
+ const char *name;
+ unsigned long offset, size;
+ char namebuf[KSYM_NAME_LEN+1];
+
+ name = kallsyms_lookup(value, &size, &offset, &modname, namebuf);
+ if (!name)
+ return NULL;
+
+ if (!offset && buf)
+ {
+ strncpy(buf, namebuf, len);
+ return (BYTE *)buf;
+ }
+
+ return NULL;
+}
+
+BYTE *GetSymbolFromValueWithOffset(ULONG value, ULONG *sym_offset,
+ BYTE *buf, ULONG len)
+{
+ char *modname;
+ const char *name;
+ unsigned long offset, size;
+ char namebuf[KSYM_NAME_LEN+1];
+
+ name = kallsyms_lookup(value, &size, &offset, &modname, namebuf);
+ if (!name || !buf)
+ return NULL;
+
+ if (sym_offset)
+ *sym_offset = offset;
+
+ strncpy(buf, namebuf, len);
+ return (BYTE *)buf;
+}
+
+BYTE *GetSymbolFromValueOffsetModule(ULONG value, ULONG *sym_offset,
+ BYTE **module, BYTE *buf, ULONG len)
+{
+ char *modname;
+ const char *name;
+ unsigned long offset, size;
+ char namebuf[KSYM_NAME_LEN+1];
+
+ name = kallsyms_lookup(value, &size, &offset, &modname, namebuf);
+ if (!name || !buf)
+ return NULL;
+
+ if (sym_offset)
+ *sym_offset = offset;
+
+ if (module)
+ *module = modname;
+
+ strncpy(buf, namebuf, len);
+ return (BYTE *)buf;
+}
+
+ULONG get_processor_id(void)
+{
+#if defined(CONFIG_SMP)
+ return smp_processor_id();
+#else
+ return 0;
+#endif
+}
+
+ULONG get_physical_processor(void)
+{
+#if defined(CONFIG_SMP)
+ return smp_processor_id();
+#else
+ return 0;
+#endif
+}
+
+ULONG fpu_present(void)
+{
+ if (boot_cpu_has(X86_FEATURE_FPU))
+ return 1;
+ return 0;
+}
+
+extern ULONG cpu_mttr_on(void)
+{
+ if (boot_cpu_has(X86_FEATURE_MTRR))
+ return 1;
+ return 0;
+}
+
+BYTE *UpcaseString(BYTE *s)
+{
+ register int i;
+
+ for (i=0; i < strlen(s); i++)
+ s[i] = toupper(s[i]);
+ return s;
+
+}
+void ClearScreen(void)
+{
+ return;
+}
+
+WORD ReadFS(void)
+{
+ WORD contents = 0;
+
+ __asm__ ("mov %%fs,%0\n\t":"=r"(contents));
+ return contents;
+}
+
+WORD ReadGS(void)
+{
+ WORD contents = 0;
+
+ __asm__ ("mov %%gs,%0\n\t":"=r"(contents));
+ return contents;
+}
+
+ULONG ReadDR(ULONG regnum)
+{
+ ULONG contents = 0;
+
+ switch(regnum)
+ {
+ case 0:
+ __asm__ ("movl %%db0,%0\n\t":"=r"(contents));
+ break;
+ case 1:
+ __asm__ ("movl %%db1,%0\n\t":"=r"(contents));
+ break;
+ case 2:
+ __asm__ ("movl %%db2,%0\n\t":"=r"(contents));
+ break;
+ case 3:
+ __asm__ ("movl %%db3,%0\n\t":"=r"(contents));
+ break;
+ case 4:
+ case 5:
+ break;
+ case 6:
+ __asm__ ("movl %%db6,%0\n\t":"=r"(contents));
+ break;
+ case 7:
+ __asm__ ("movl %%db7,%0\n\t":"=r"(contents));
+ break;
+ default:
+ break;
+ }
+
+ return contents;
+}
+
+void WriteDR(int regnum, ULONG contents)
+{
+ switch(regnum)
+ {
+ case 0:
+ __asm__ ("movl %0,%%db0\n\t"::"r"(contents));
+ break;
+ case 1:
+ __asm__ ("movl %0,%%db1\n\t"::"r"(contents));
+ break;
+ case 2:
+ __asm__ ("movl %0,%%db2\n\t"::"r"(contents));
+ break;
+ case 3:
+ __asm__ ("movl %0,%%db3\n\t"::"r"(contents));
+ break;
+ case 4:
+ case 5:
+ break;
+ case 6:
+ __asm__ ("movl %0,%%db6\n\t"::"r"(contents));
+ break;
+ case 7:
+ __asm__ ("movl %0,%%db7\n\t"::"r"(contents));
+ break;
+ default:
+ break;
+ }
+}
+
+ULONG ReadCR(int regnum)
+{
+ ULONG contents = 0;
+
+ switch(regnum)
+ {
+ case 0:
+ __asm__ ("movl %%cr0,%0\n\t":"=r"(contents));
+ break;
+ case 1:
+ break;
+ case 2:
+ __asm__ ("movl %%cr2,%0\n\t":"=r"(contents));
+ break;
+ case 3:
+ __asm__ ("movl %%cr3,%0\n\t":"=r"(contents));
+ break;
+ case 4:
+ __asm__ ("movl %%cr4,%0\n\t":"=r"(contents));
+ break;
+ default:
+ break;
+ }
+ return contents;
+}
+
+void WriteCR(int regnum, ULONG contents)
+{
+ switch(regnum)
+ {
+ case 0:
+ __asm__ ("movl %0,%%cr0\n\t"::"r"(contents));
+ break;
+ case 1:
+ break;
+ case 2:
+ __asm__ ("movl %0,%%cr2\n\t"::"r"(contents));
+ break;
+ case 3:
+ __asm__ ("movl %0,%%cr3\n\t"::"r"(contents));
+ break;
+ case 4:
+ __asm__ ("movl %0,%%cr4\n\t"::"r"(contents));
+ break;
+ default:
+ break;
+ }
+ return;
+}
+
+ULONG ReadTR(void)
+{
+ unsigned short tr;
+
+ __asm__ __volatile__("str %0":"=a"(tr));
+
+ return (ULONG) tr;
+}
+
+ULONG ReadLDTR(void)
+{
+ unsigned short ldt;
+
+ __asm__ __volatile__("sldt %0":"=a"(ldt));
+
+ return (ULONG) ldt;
+}
+
+void ReadGDTR(ULONG *v)
+{
+ __asm__ __volatile__("sgdt %0":"=m"(*v));
+}
+
+void ReadIDTR(ULONG *v)
+{
+ __asm__ __volatile__("sidt %0":"=m"(*v));
+}
+
+void save_npx(NUMERIC_FRAME *v)
+{
+ __asm__ __volatile__("fsave %0":"=m"(*v));
+}
+
+void load_npx(NUMERIC_FRAME *v)
+{
+ __asm__ __volatile__("frstor %0":"=m"(*v));
+}
+
+ULONG ReadDR0(void) { return (ReadDR(0)); }
+ULONG ReadDR1(void) { return (ReadDR(1)); }
+ULONG ReadDR2(void) { return (ReadDR(2)); }
+ULONG ReadDR3(void) { return (ReadDR(3)); }
+ULONG ReadDR6(void) { return (ReadDR(6)); }
+ULONG ReadDR7(void) { return (ReadDR(7)); }
+
+void WriteDR0(ULONG v) { WriteDR(0, v); }
+void WriteDR1(ULONG v) { WriteDR(1, v); }
+void WriteDR2(ULONG v) { WriteDR(2, v); }
+void WriteDR3(ULONG v) { WriteDR(3, v); }
+void WriteDR6(ULONG v) { WriteDR(6, v); }
+void WriteDR7(ULONG v) { WriteDR(7, v); }
+
+ULONG ReadCR0(void) { return (ReadCR(0)); }
+ULONG ReadCR2(void) { return (ReadCR(2)); }
+ULONG ReadCR3(void) { return (ReadCR(3)); }
+ULONG ReadCR4(void) { return (ReadCR(4)); }
+
+void WriteCR0(ULONG v) { WriteCR(0, v); }
+void WriteCR2(ULONG v) { WriteCR(2, v); }
+void WriteCR3(ULONG v) { WriteCR(3, v); }
+void WriteCR4(ULONG v) { WriteCR(4, v); }
+
+void ReadMSR(ULONG r, ULONG *v1, ULONG *v2)
+{
+ ULONG vv1, vv2;
+
+ rdmsr(r, vv1, vv2);
+
+ if (v1)
+ *v1 = vv1;
+ if (v2)
+ *v2 = vv2;
+}
+
+void WriteMSR(ULONG r, ULONG *v1, ULONG *v2)
+{
+ ULONG vv1 = 0, vv2 = 0;
+
+ if (v1)
+ vv1 = *v1;
+ if (v2)
+ vv2 = *v2;
+
+ wrmsr(r, vv1, vv2);
+}
+
+#endif
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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