The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/tools/reorder/mapaddrs.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,97 @@
     1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
     1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.7 +
     1.8 +/*
     1.9 +
    1.10 +  A program that reverse-maps a binary stream of address references to
    1.11 +  function names.
    1.12 +
    1.13 + */
    1.14 +
    1.15 +#include <fstream>
    1.16 +#include <unistd.h>
    1.17 +#include <fcntl.h>
    1.18 +#include <stdio.h>
    1.19 +
    1.20 +#include "elf_symbol_table.h"
    1.21 +
    1.22 +#define _GNU_SOURCE
    1.23 +#include <getopt.h>
    1.24 +
    1.25 +static int
    1.26 +map_addrs(int fd, elf_symbol_table &table)
    1.27 +{
    1.28 +    // Read the binary addresses from stdin.
    1.29 +    unsigned int buf[128];
    1.30 +    ssize_t cb;
    1.31 +
    1.32 +    while ((cb = read(fd, buf, sizeof buf)) > 0) {
    1.33 +        if (cb % sizeof buf[0])
    1.34 +            fprintf(stderr, "unaligned read\n");
    1.35 +
    1.36 +        unsigned int *addr = buf;
    1.37 +        unsigned int *limit = buf + (cb / 4);
    1.38 +
    1.39 +        for (; addr < limit; ++addr) {
    1.40 +            const Elf32_Sym *sym = table.lookup(*addr);
    1.41 +            if (sym)
    1.42 +                cout << table.get_symbol_name(sym) << endl;
    1.43 +        }
    1.44 +    }
    1.45 +
    1.46 +    return 0;
    1.47 +}
    1.48 +
    1.49 +static struct option long_options[] = {
    1.50 +    { "exe", required_argument, 0, 'e' },
    1.51 +    { 0,     0,                 0, 0   }
    1.52 +};
    1.53 +
    1.54 +static void
    1.55 +usage()
    1.56 +{
    1.57 +    cerr << "usage: mapaddrs --exe=exe file ..." << endl;
    1.58 +}
    1.59 +
    1.60 +int
    1.61 +main(int argc, char *argv[])
    1.62 +{
    1.63 +    elf_symbol_table table;
    1.64 +
    1.65 +    while (1) {
    1.66 +        int option_index = 0;
    1.67 +        int c = getopt_long(argc, argv, "e:", long_options, &option_index);
    1.68 +
    1.69 +        if (c < 0)
    1.70 +            break;
    1.71 +
    1.72 +        switch (c) {
    1.73 +        case 'e':
    1.74 +            table.init(optarg);
    1.75 +            break;
    1.76 +
    1.77 +        default:
    1.78 +            usage();
    1.79 +            return 1;
    1.80 +        }
    1.81 +    }
    1.82 +
    1.83 +    if (optind >= argc) {
    1.84 +        map_addrs(STDIN_FILENO, table);
    1.85 +    }
    1.86 +    else {
    1.87 +        do {
    1.88 +            int fd = open(argv[optind], O_RDONLY);
    1.89 +            if (fd < 0) {
    1.90 +                perror(argv[optind]);
    1.91 +                return 1;
    1.92 +            }
    1.93 +
    1.94 +            map_addrs(fd, table);
    1.95 +            close(fd);
    1.96 +        } while (++optind < argc);
    1.97 +    }
    1.98 +
    1.99 +    return 0;
   1.100 +}