projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| f5e706ad SR |
2 | /* |
| 3 | * kdebug.h: Defines and definitions for debugging the Linux kernel | |
| 4 | * under various kernel debuggers. | |
| 5 | * | |
| 6 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
| 7 | */ | |
| 8 | #ifndef _SPARC_KDEBUG_H | |
| 9 | #define _SPARC_KDEBUG_H | |
| 10 | ||
| 11 | #include <asm/openprom.h> | |
| 12 | #include <asm/vaddrs.h> | |
| 13 | ||
| 14 | /* Breakpoints are enter through trap table entry 126. So in sparc assembly | |
| 15 | * if you want to drop into the debugger you do: | |
| 16 | * | |
| 17 | * t DEBUG_BP_TRAP | |
| 18 | */ | |
| 19 | ||
| 20 | #define DEBUG_BP_TRAP 126 | |
| 21 | ||
| 22 | #ifndef __ASSEMBLY__ | |
| 23 | /* The debug vector is passed in %o1 at boot time. It is a pointer to | |
| 24 | * a structure in the debuggers address space. Here is its format. | |
| 25 | */ | |
| 26 | ||
| 27 | typedef unsigned int (*debugger_funct)(void); | |
| 28 | ||
| 29 | struct kernel_debug { | |
| 30 | /* First the entry point into the debugger. You jump here | |
| 31 | * to give control over to the debugger. | |
| 32 | */ | |
| 33 | unsigned long kdebug_entry; | |
| 34 | unsigned long kdebug_trapme; /* Figure out later... */ | |
| 35 | /* The following is the number of pages that the debugger has | |
| 36 | * taken from to total pool. | |
| 37 | */ | |
| 38 | unsigned long *kdebug_stolen_pages; | |
| 39 | /* Ok, after you remap yourself and/or change the trap table | |
| 40 | * from what you were left with at boot time you have to call | |
| 41 | * this synchronization function so the debugger can check out | |
| 42 | * what you have done. | |
| 43 | */ | |
| 44 | debugger_funct teach_debugger; | |
| 45 | }; /* I think that is it... */ | |
| 46 | ||
| 47 | extern struct kernel_debug *linux_dbvec; | |
| 48 | ||
| 49 | /* Use this macro in C-code to enter the debugger. */ | |
| 50 | static inline void sp_enter_debugger(void) | |
| 51 | { | |
| 52 | __asm__ __volatile__("jmpl %0, %%o7\n\t" | |
| 53 | "nop\n\t" : : | |
| 54 | "r" (linux_dbvec) : "o7", "memory"); | |
| 55 | } | |
| 56 | ||
| 57 | #define SP_ENTER_DEBUGGER do { \ | |
| 58 | if((linux_dbvec!=0) && ((*(short *)linux_dbvec)!=-1)) \ | |
| 59 | sp_enter_debugger(); \ | |
| 60 | } while(0) | |
| 61 | ||
| 62 | enum die_val { | |
| 63 | DIE_UNUSED, | |
| c10555fa | 64 | DIE_OOPS, |
| f5e706ad SR |
65 | }; |
| 66 | ||
| 67 | #endif /* !(__ASSEMBLY__) */ | |
| 68 | ||
| 69 | /* Some nice offset defines for assembler code. */ | |
| 70 | #define KDEBUG_ENTRY_OFF 0x0 | |
| 71 | #define KDEBUG_DUNNO_OFF 0x4 | |
| 72 | #define KDEBUG_DUNNO2_OFF 0x8 | |
| 73 | #define KDEBUG_TEACH_OFF 0xc | |
| 74 | ||
| 75 | #endif /* !(_SPARC_KDEBUG_H) */ |