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// 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);
}
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