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- /* $Id: kdebug.h,v 1.3 1997/12/14 23:24:47 ecd Exp $
- * kdebug.h: Defines and definitions for debugging the Linux kernel
- * under various kernel debuggers.
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- */
- #ifndef _SPARC64_KDEBUG_H
- #define _SPARC64_KDEBUG_H
-
- #include <asm/openprom.h>
-
- /* XXX This needs to all be fixed for Ultra/V9 -DaveM */
-
- /* The debugger lives in 1MB of virtual address space right underneath
- * the boot prom.
- */
-
- #define DEBUG_FIRSTVADDR 0xffc00000
- #define DEBUG_LASTVADDR LINUX_OPPROM_BEGVM
-
- /* Breakpoints are enter through trap table entry 126. So in sparc assembly
- * if you want to drop into the debugger you do:
- *
- * t DEBUG_BP_TRAP
- */
-
- #define DEBUG_BP_TRAP 126
-
- #ifndef __ASSEMBLY__
- /* The debug vector is passed in %o1 at boot time. It is a pointer to
- * a structure in the debuggers address space. Here is its format.
- */
-
- typedef unsigned int (*debugger_funct)(void);
-
- struct kernel_debug {
- /* First the entry point into the debugger. You jump here
- * to give control over to the debugger.
- */
- unsigned long kdebug_entry;
- unsigned long kdebug_trapme; /* Figure out later... */
- /* The following is the number of pages that the debugger has
- * taken from to total pool.
- */
- unsigned long *kdebug_stolen_pages;
- /* Ok, after you remap yourself and/or change the trap table
- * from what you were left with at boot time you have to call
- * this synchronization function so the debugger can check out
- * what you have done.
- */
- debugger_funct teach_debugger;
- }; /* I think that is it... */
-
- extern struct kernel_debug *linux_dbvec;
-
- /* Use this macro in C-code to enter the debugger. */
- extern __inline__ void sp_enter_debugger(void)
- {
- __asm__ __volatile__("jmpl %0, %%o7\n\t"
- "nop\n\t" : :
- "r" (linux_dbvec) : "o7", "memory");
- }
-
- #define SP_ENTER_DEBUGGER do { \
- if((linux_dbvec!=0) && ((*(short *)linux_dbvec)!=-1)) \
- sp_enter_debugger(); \
- } while(0)
-
- #endif /* !(__ASSEMBLY__) */
-
- /* Some nice offset defines for assembler code. */
- #define KDEBUG_ENTRY_OFF 0x0
- #define KDEBUG_DUNNO_OFF 0x4
- #define KDEBUG_DUNNO2_OFF 0x8
- #define KDEBUG_TEACH_OFF 0xc
-
- #endif /* !(_SPARC64_KDEBUG_H) */
-