debug/kdb/kdb_bp.c

40 static char *kdb_bptype(kdb_bp_t *bp)
42 	if (bp->bp_type < 0 || bp->bp_type > 4)
45 	return kdb_rwtypes[bp->bp_type];
48 static int kdb_parsebp(int argc, const char **argv, int *nextargp, kdb_bp_t *bp)
53 	bp->bph_length = 1;
56 			bp->bp_type = BP_ACCESS_WATCHPOINT;
58 			bp->bp_type = BP_WRITE_WATCHPOINT;
60 			bp->bp_type = BP_HARDWARE_BREAKPOINT;
64 		bp->bph_length = 1;
80 			bp->bph_length = len;
92 static int _kdb_bp_remove(kdb_bp_t *bp)
95 	if (!bp->bp_installed)
97 	if (!bp->bp_type)
98 		ret = dbg_remove_sw_break(bp->bp_addr);
100 		ret = arch_kgdb_ops.remove_hw_breakpoint(bp->bp_addr,
101 			 bp->bph_length,
102 			 bp->bp_type);
104 		bp->bp_installed = 0;
108 static void kdb_handle_bp(struct pt_regs *regs, kdb_bp_t *bp)
121 	bp->bp_delay = 0;
122 	bp->bp_delayed = 1;
125 static int _kdb_bp_install(struct pt_regs *regs, kdb_bp_t *bp)
134 			   __func__, bp->bp_installed);
136 		bp->bp_delay = 0;
137 	if (bp->bp_installed)
139 	if (bp->bp_delay || (bp->bp_delayed && KDB_STATE(DOING_SS))) {
141 			kdb_printf("%s: delayed bp\n", __func__);
142 		kdb_handle_bp(regs, bp);
145 	if (!bp->bp_type)
146 		ret = dbg_set_sw_break(bp->bp_addr);
148 		ret = arch_kgdb_ops.set_hw_breakpoint(bp->bp_addr,
149 			 bp->bph_length,
150 			 bp->bp_type);
152 		bp->bp_installed = 1;
155 			   __func__, bp->bp_addr);
156 		if (!bp->bp_type) {
179 		kdb_bp_t *bp = &kdb_breakpoints[i];
182 			kdb_printf("%s: bp %d bp_enabled %d\n",
183 				   __func__, i, bp->bp_enabled);
185 		if (bp->bp_enabled)
186 			_kdb_bp_install(regs, bp);
210 		kdb_bp_t *bp = &kdb_breakpoints[i];
213 			kdb_printf("%s: bp %d bp_enabled %d\n",
214 				   __func__, i, bp->bp_enabled);
216 		if (bp->bp_enabled)
217 			_kdb_bp_remove(bp);
238 static void kdb_printbp(kdb_bp_t *bp, int i)
240 	kdb_printf("%s ", kdb_bptype(bp));
242 	kdb_symbol_print(bp->bp_addr, NULL, KDB_SP_DEFAULT);
244 	if (bp->bp_enabled)
250 		   bp->bp_addr, bp->bp_type, bp->bp_installed);
258  *	Handle the bp commands.
260  *	[bp|bph] <addr-expression> [DATAR|DATAW]
273  *	bp	Set breakpoint on all cpus.  Only use hardware assist if need.
280 	kdb_bp_t *bp, *bp_check;
291 		for (bpno = 0, bp = kdb_breakpoints; bpno < KDB_MAXBPT;
292 		     bpno++, bp++) {
293 			if (bp->bp_free)
295 			kdb_printbp(bp, bpno);
319 	 * Find an empty bp structure to allocate
321 	for (bpno = 0, bp = kdb_breakpoints; bpno < KDB_MAXBPT; bpno++, bp++) {
322 		if (bp->bp_free)
359 	*bp = template;
360 	bp->bp_free = 0;
362 	kdb_printbp(bp, bpno);
389 	kdb_bp_t *bp = NULL;
427 			for (i = 0, bp = kdb_breakpoints; i < KDB_MAXBPT;
428 			    i++, bp++) {
429 				if (bp->bp_addr == addr) {
442 	for (bp = &kdb_breakpoints[lowbp], i = lowbp;
444 	    i++, bp++) {
445 		if (bp->bp_free)
452 			bp->bp_enabled = 0;
456 				   i, bp->bp_addr);
458 			bp->bp_addr = 0;
459 			bp->bp_free = 1;
463 			bp->bp_enabled = 1;
467 				   i, bp->bp_addr);
472 			if (!bp->bp_enabled)
475 			bp->bp_enabled = 0;
479 				   i, bp->bp_addr);
483 		if (bp->bp_delay && (cmd == KDBCMD_BC || cmd == KDBCMD_BD)) {
484 			bp->bp_delay = 0;
526 	{	.name = "bp",
578 	kdb_bp_t *bp;
585 	for (i = 0, bp = kdb_breakpoints; i < KDB_MAXBPT; i++, bp++)
586 		bp->bp_free = 1;