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75 lines
2.0 KiB
75 lines
2.0 KiB
/* 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 ([email protected]) |
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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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