/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* kdebug.h: Defines and definitions for debugging the Linux kernel
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* under various kernel debuggers.
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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*/
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#ifndef _SPARC_KDEBUG_H
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#define _SPARC_KDEBUG_H
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#include <asm/openprom.h>
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#include <asm/vaddrs.h>
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/* Breakpoints are enter through trap table entry 126. So in sparc assembly
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* if you want to drop into the debugger you do:
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*
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* t DEBUG_BP_TRAP
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*/
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#define DEBUG_BP_TRAP 126
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#ifndef __ASSEMBLY__
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/* The debug vector is passed in %o1 at boot time. It is a pointer to
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* a structure in the debuggers address space. Here is its format.
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*/
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typedef unsigned int (*debugger_funct)(void);
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struct kernel_debug {
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/* First the entry point into the debugger. You jump here
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* to give control over to the debugger.
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*/
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unsigned long kdebug_entry;
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unsigned long kdebug_trapme; /* Figure out later... */
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/* The following is the number of pages that the debugger has
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* taken from to total pool.
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*/
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unsigned long *kdebug_stolen_pages;
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/* Ok, after you remap yourself and/or change the trap table
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* from what you were left with at boot time you have to call
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* this synchronization function so the debugger can check out
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* what you have done.
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*/
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debugger_funct teach_debugger;
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}; /* I think that is it... */
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extern struct kernel_debug *linux_dbvec;
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/* Use this macro in C-code to enter the debugger. */
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static inline void sp_enter_debugger(void)
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{
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__asm__ __volatile__("jmpl %0, %%o7\n\t"
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"nop\n\t" : :
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"r" (linux_dbvec) : "o7", "memory");
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}
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#define SP_ENTER_DEBUGGER do { \
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if((linux_dbvec!=0) && ((*(short *)linux_dbvec)!=-1)) \
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sp_enter_debugger(); \
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} while(0)
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enum die_val {
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DIE_UNUSED,
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DIE_OOPS,
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};
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#endif /* !(__ASSEMBLY__) */
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/* Some nice offset defines for assembler code. */
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#define KDEBUG_ENTRY_OFF 0x0
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#define KDEBUG_DUNNO_OFF 0x4
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#define KDEBUG_DUNNO2_OFF 0x8
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#define KDEBUG_TEACH_OFF 0xc
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#endif /* !(_SPARC_KDEBUG_H) */
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