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File: [local] / sys / arch / mvmeppc / mvmeppc / db_interface.c (download)

Revision 1.1, Tue Mar 4 16:07:46 2008 UTC (16 years, 2 months ago) by nbrk
Branch point for: MAIN 

Initial revision

/*	$OpenBSD: db_interface.c,v 1.1 2002/06/08 16:02:14 miod Exp $	*/
/*      $NetBSD: db_interface.c,v 1.12 2001/07/22 11:29:46 wiz Exp $ */

#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>

#include <dev/cons.h>

#include <machine/db_machdep.h>
#include <ddb/db_extern.h>

int ddb_trap_glue(struct trapframe *frame); /* called from locore */

void
Debugger()
{
#ifdef DDB
	ddb_trap();
#else
	mvmeprom_return();
#endif
}

#ifdef DDB

int
ddb_trap_glue(frame)
	struct trapframe *frame;
{
	if (!(frame->srr1 & PSL_PR)
	    && (frame->exc == EXC_TRC
		|| (frame->exc == EXC_PGM
		    && (frame->srr1 & 0x20000))
		|| frame->exc == EXC_BPT)) {

		bcopy(frame->fixreg, DDB_REGS->tf.fixreg,
			32 * sizeof(u_int32_t));
		DDB_REGS->tf.srr0 = frame->srr0;
		DDB_REGS->tf.srr1 = frame->srr1;

		cnpollc(TRUE);
		db_trap(T_BREAKPOINT, 0);
		cnpollc(FALSE);

		bcopy(DDB_REGS->tf.fixreg, frame->fixreg,
			32 * sizeof(u_int32_t));

		return 1;
	}
	return 0;
}

#endif