arch/sparc/include/asm/kdebug_32.h

Source file repositories/reference/linux-study-clean/arch/sparc/include/asm/kdebug_32.h

File Facts

System
Linux kernel
Corpus path
arch/sparc/include/asm/kdebug_32.h
Extension
.h
Size
2043 bytes
Lines
76
Domain
Architecture Layer
Bucket
arch/sparc
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

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 /* !(__ASSEMBLER__) */

/* 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) */

Annotation

Implementation Notes