75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
|
/*
|
||
|
|
* 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 _SPARC_KDEBUG_H
|
||
|
|
#define _SPARC_KDEBUG_H
|
||
|
|
|
||
|
|
#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:
|
||
|
|
*
|
||
|
|
* 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. */
|
||
|
|
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 {
|
||
|
|
DIE_UNUSED,
|
||
|
|
DIE_OOPS,
|
||
|
|
};
|
||
|
|
|
||
|
|
#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) */
|