1a439fe51SSam Ravnborg /* 2a439fe51SSam Ravnborg * kdebug.h: Defines and definitions for debugging the Linux kernel 3a439fe51SSam Ravnborg * under various kernel debuggers. 4a439fe51SSam Ravnborg * 5a439fe51SSam Ravnborg * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) 6a439fe51SSam Ravnborg */ 7a439fe51SSam Ravnborg #ifndef _SPARC_KDEBUG_H 8a439fe51SSam Ravnborg #define _SPARC_KDEBUG_H 9a439fe51SSam Ravnborg 10a439fe51SSam Ravnborg #include <asm/openprom.h> 11a439fe51SSam Ravnborg #include <asm/vaddrs.h> 12a439fe51SSam Ravnborg 13a439fe51SSam Ravnborg /* Breakpoints are enter through trap table entry 126. So in sparc assembly 14a439fe51SSam Ravnborg * if you want to drop into the debugger you do: 15a439fe51SSam Ravnborg * 16a439fe51SSam Ravnborg * t DEBUG_BP_TRAP 17a439fe51SSam Ravnborg */ 18a439fe51SSam Ravnborg 19a439fe51SSam Ravnborg #define DEBUG_BP_TRAP 126 20a439fe51SSam Ravnborg 21a439fe51SSam Ravnborg #ifndef __ASSEMBLY__ 22a439fe51SSam Ravnborg /* The debug vector is passed in %o1 at boot time. It is a pointer to 23a439fe51SSam Ravnborg * a structure in the debuggers address space. Here is its format. 24a439fe51SSam Ravnborg */ 25a439fe51SSam Ravnborg 26a439fe51SSam Ravnborg typedef unsigned int (*debugger_funct)(void); 27a439fe51SSam Ravnborg 28a439fe51SSam Ravnborg struct kernel_debug { 29a439fe51SSam Ravnborg /* First the entry point into the debugger. You jump here 30a439fe51SSam Ravnborg * to give control over to the debugger. 31a439fe51SSam Ravnborg */ 32a439fe51SSam Ravnborg unsigned long kdebug_entry; 33a439fe51SSam Ravnborg unsigned long kdebug_trapme; /* Figure out later... */ 34a439fe51SSam Ravnborg /* The following is the number of pages that the debugger has 35a439fe51SSam Ravnborg * taken from to total pool. 36a439fe51SSam Ravnborg */ 37a439fe51SSam Ravnborg unsigned long *kdebug_stolen_pages; 38a439fe51SSam Ravnborg /* Ok, after you remap yourself and/or change the trap table 39a439fe51SSam Ravnborg * from what you were left with at boot time you have to call 40a439fe51SSam Ravnborg * this synchronization function so the debugger can check out 41a439fe51SSam Ravnborg * what you have done. 42a439fe51SSam Ravnborg */ 43a439fe51SSam Ravnborg debugger_funct teach_debugger; 44a439fe51SSam Ravnborg }; /* I think that is it... */ 45a439fe51SSam Ravnborg 46a439fe51SSam Ravnborg extern struct kernel_debug *linux_dbvec; 47a439fe51SSam Ravnborg 48a439fe51SSam Ravnborg /* Use this macro in C-code to enter the debugger. */ 49a439fe51SSam Ravnborg static inline void sp_enter_debugger(void) 50a439fe51SSam Ravnborg { 51a439fe51SSam Ravnborg __asm__ __volatile__("jmpl %0, %%o7\n\t" 52a439fe51SSam Ravnborg "nop\n\t" : : 53a439fe51SSam Ravnborg "r" (linux_dbvec) : "o7", "memory"); 54a439fe51SSam Ravnborg } 55a439fe51SSam Ravnborg 56a439fe51SSam Ravnborg #define SP_ENTER_DEBUGGER do { \ 57a439fe51SSam Ravnborg if((linux_dbvec!=0) && ((*(short *)linux_dbvec)!=-1)) \ 58a439fe51SSam Ravnborg sp_enter_debugger(); \ 59a439fe51SSam Ravnborg } while(0) 60a439fe51SSam Ravnborg 61a439fe51SSam Ravnborg enum die_val { 62a439fe51SSam Ravnborg DIE_UNUSED, 63a439fe51SSam Ravnborg }; 64a439fe51SSam Ravnborg 65a439fe51SSam Ravnborg #endif /* !(__ASSEMBLY__) */ 66a439fe51SSam Ravnborg 67a439fe51SSam Ravnborg /* Some nice offset defines for assembler code. */ 68a439fe51SSam Ravnborg #define KDEBUG_ENTRY_OFF 0x0 69a439fe51SSam Ravnborg #define KDEBUG_DUNNO_OFF 0x4 70a439fe51SSam Ravnborg #define KDEBUG_DUNNO2_OFF 0x8 71a439fe51SSam Ravnborg #define KDEBUG_TEACH_OFF 0xc 72a439fe51SSam Ravnborg 73a439fe51SSam Ravnborg #endif /* !(_SPARC_KDEBUG_H) */ 74