1 files changed, 68 insertions, 0 deletions
diff --git a/src/cmd/objdump/main.c b/src/cmd/objdump/main.c
new file mode 100644
index 000000000..b684be7fb
--- /dev/null
+++ b/src/cmd/objdump/main.c
@@ -0,0 +1,68 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+ * objdump simulation - only enough to make pprof work on Macs
+ */
+
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <mach.h>
+
+void
+usage(void)
+{
+	fprint(2, "usage: objdump binary start stop\n");
+	fprint(2, "Disassembles binary from PC start up to stop.\n");
+	exits("usage");
+}
+
+void
+main(int argc, char **argv)
+{
+	int fd, n;
+	uvlong pc, start, stop;
+	Fhdr fhdr;
+	Biobuf bout;
+	char buf[1024];
+	Map *text;
+
+	ARGBEGIN{
+	default:
+		usage();
+	}ARGEND
+
+	if(argc != 3)
+		usage();
+	start = strtoull(argv[1], 0, 16);
+	stop = strtoull(argv[2], 0, 16);
+
+	fd = open(argv[0], OREAD);
+	if(fd < 0)
+		sysfatal("open %s: %r", argv[0]);
+	if(crackhdr(fd, &fhdr) <= 0)
+		sysfatal("crackhdr: %r");
+	machbytype(fhdr.type);
+	if(syminit(fd, &fhdr) <= 0)
+		sysfatal("syminit: %r");
+	text = loadmap(nil, fd, &fhdr);
+	if(text == nil)
+		sysfatal("loadmap: %r");
+
+	Binit(&bout, 1, OWRITE);
+	for(pc=start; pc<stop; ) {
+		if(fileline(buf, sizeof buf, pc))
+			Bprint(&bout, "%s\n", buf);
+		buf[0] = '\0';
+		machdata->das(text, pc, 0, buf, sizeof buf);
+		Bprint(&bout, " %llx: %s\n", pc, buf);
+		n = machdata->instsize(text, pc);
+		if(n <= 0)
+			break;
+		pc += n;
+	}
+	Bflush(&bout);
+	exits(0);
+}