blob: 1d0b240222ef45b8fe985f09ce475b53e9e2a81d [file] [log] [blame]
* kdebug.h: Defines and definitions for debugging the Linux kernel
* under various kernel debuggers.
* Copyright (C) 1995 David S. Miller (
#include <asm/openprom.h>
#include <asm/vaddrs.h>
/* Breakpoints are enter through trap table entry 126. So in sparc assembly
* if you want to drop into the debugger you do:
#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. */
static 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)
enum die_val {
#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 /* !(_SPARC_KDEBUG_H) */