change to use attach functions.

$a means switch thread in core dumps.
(maybe that should be $A now?).

src/cmd/db/defs.h

@@ -102,9 +102,7 @@ extern	int	nnote;
 extern	char	note[NNOTE][ERRMAX];
 
 extern	int	ending;
-extern	Fhdr	*corhdr, *symhdr;
-extern	Map	*cormap, *symmap, *dotmap;
-extern	Regs	*correg;
+extern	Map	*dotmap;
 
 extern	BKPT	*bkpthead;
 extern	int	kflag;

src/cmd/db/main.c

@@ -24,8 +24,6 @@ extern	char	*Ipath;
 jmp_buf env;
 static char *errmsg;
 
-Fhdr *symhdr, *corhdr;
-
 void
 usage(void)
 {
@@ -36,11 +34,11 @@ usage(void)
 void
 main(int argc, char **argv)
 {
-	int i, omode;
+	int omode, quiet;
 	char *s;
 	char *name;
-	Fhdr *hdr;
 
+	quiet = 0;
 	name = 0;
 	outputinit();
 	maxoff = MAXOFF;
@@ -68,86 +66,12 @@ main(int argc, char **argv)
 		if(name == 0)
 			dprint("missing -m argument\n");
 		break;
+	case 'q':
+		quiet = 1;
+		break;
 	}ARGEND
 
-	/*
-	 * Unix and Plan 9 differ on what the right order of pid, text, and core is.
-	 * I never remember anyway.  Let's just accept them in any order.
-	 */
-	for(i=0; i<argc; i++){
-		if(alldigs(argv[i])){
-			if(pid){
-				dprint("already have pid %d; ignoring pid %d\n", pid, argv[i]);
-				continue;
-			}
-			if(corhdr){
-				dprint("already have core %s; ignoring pid %d\n", corfil, pid);
-				continue;
-			}
-			pid = atoi(argv[i]);
-			continue;
-		}
-		if((hdr = crackhdr(argv[i], omode)) == nil){
-			dprint("crackhdr %s: %r\n", argv[i]);
-			continue;
-		}
-		dprint("%s: %s %s %s\n", argv[i], hdr->aname, hdr->mname, hdr->fname);
-		if(hdr->ftype == FCORE){
-			if(pid){
-				dprint("already have pid %d; ignoring core %s\n", pid, argv[i]);
-				uncrackhdr(hdr);
-				continue;
-			}
-			if(corhdr){
-				dprint("already have core %s; ignoring core %s\n", corfil, argv[i]);
-				uncrackhdr(hdr);
-				continue;
-			}
-			corhdr = hdr;
-			corfil = argv[i];
-		}else{
-			if(symhdr){
-				dprint("already have text %s; ignoring text %s\n", symfil, argv[i]);
-				uncrackhdr(hdr);
-				continue;
-			}
-			symhdr = hdr;
-			symfil = argv[i];
-		}
-	}
-
-	if(symhdr==nil){
-		symfil = "a.out";
-		if(pid){
-			if((s = proctextfile(pid)) != nil){
-				dprint("pid %d: text %s\n", pid, s);
-				symfil = s;
-			}
-		}
-		/* XXX pull command from core */
-
-		if((symhdr = crackhdr(symfil, omode)) == nil){
-			dprint("crackhdr %s: %r\n", symfil);
-			symfil = nil;
-		}
-	}
-
-	if(!mach)
-		mach = machcpu;
-
-	/*
-	 * Set up maps.
-	 */
-	symmap = allocmap();
-	cormap = allocmap();
-	if(symmap == nil || cormap == nil)
-		sysfatal("allocating maps: %r");
-
-	if(symhdr){
-		if(mapfile(symhdr, 0, symmap, nil) < 0)
-			dprint("mapping %s: %r\n", symfil);
-		mapfile(symhdr, 0, cormap, nil);
-	}
+	attachargs(argc, argv, omode, !quiet);
 
 	dotmap = dumbmap(-1);
 
@@ -159,7 +83,7 @@ main(int argc, char **argv)
 	if(setjmp(env) == 0){
 		if (pid || corhdr)
 			setcor();	/* could get error */
-		if (correg) {
+		if (correg && !quiet) {
 			dprint("%s\n", mach->exc(cormap, correg));
 			printpc();
 		}

src/cmd/db/mkfile

@@ -17,7 +17,7 @@ OFILES=\
 
 HFILES=defs.h\
 	fns.h\
-
+	$PLAN9/include/mach.h\
 
 <$PLAN9/src/mkone
 

src/cmd/db/print.c

@@ -125,6 +125,11 @@ printdollar(int modif)
 		attachprocess();
 		break;
 
+/* maybe use this for lwpids?
+	case 'A':
+		attachpthread();
+		break;
+*/
 	case 'k':
 		kmsys();
 		break;

src/cmd/db/setup.c

@@ -27,18 +27,29 @@ setsym(void)
 void
 setcor(void)
 {
-	unmapproc(cormap);
-	unmapfile(corhdr, cormap);
-	free(correg);
-	correg = nil;
+	static int mapped;
 
-	if (pid > 0) {
-		if (mapproc(pid, cormap, &correg) < 0)
-			dprint("mapproc %d: %r\n", pid);
-	} else {
-		if (corhdr) {
+	if (corhdr) {
+		if (!mapped) {
 			if (mapfile(corhdr, 0, cormap, &correg) < 0)
 				dprint("mapfile %s: %r\n", corfil);
+			mapped = 1;
+		}
+		free(correg);
+		if (pid == 0 && corhdr->nthread > 0)
+			pid = corhdr->thread[0].id;
+		correg = coreregs(corhdr, pid);
+		if(correg == nil)
+			dprint("no such pid in core dump\n");
+	} else {
+		unmapproc(cormap);
+		unmapfile(corhdr, cormap);
+		free(correg);
+		correg = nil;
+
+		if (pid > 0) {
+			if (mapproc(pid, cormap, &correg) < 0)
+				dprint("mapproc %d: %r\n", pid);
 		} else
 			dprint("no core image\n");
 	}
@@ -137,7 +148,7 @@ void
 attachprocess(void)
 {
 	if (!adrflg) {
-		dprint("used pid$a\n");
+		dprint("usage: pid$a\n");
 		return;
 	}
 	pid = adrval;