3

プログラムが特定のライブラリからロードするシンボルをリストしたいと思います。ldd を使用して、必要なライブラリを一覧表示できます。

    ldd -v myExecutable

これにより、次のような出力が得られます。

    libgcc_s.so.1 (GCC_3.0) => /lib/i386-linux-gnu/libgcc_s.so.1
    libc.so.6 (GLIBC_2.1) => /lib/i386-linux-gnu/libc.so.6
    libc.so.6 (GLIBC_2.11) => /lib/i386-linux-gnu/libc.so.6
    libc.so.6 (GLIBC_2.1.3) => /lib/i386-linux-gnu/libc.so.6
    libc.so.6 (GLIBC_2.0) => /lib/i386-linux-gnu/libc.so.6

今、どのシンボルがどのライブラリからロードされているか知りたいです。具体的には、私の場合、GLIBC_2.11 からロードされたものを見つけて、最終的にそれらを取り除きたいと考えています。

(新しいシンボルへのリンクを避けるために、すでにligccを使用しています。2.11より前に使用できないシンボルを確認したいと思います)

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2 に答える 2

2

LD_DEBUG環境変数を使用します。例えば：

$ LD_USE_LOAD_BIAS=0 LD_DEBUG=all ls |& grep binding
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `_res' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `_IO_file_close' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `stderr' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `error_one_per_line' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `__malloc_initialize_hook' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/ld-linux-x86-64.so.2 [0]: normal symbol `_dl_starting_up' [GLIBC_PRIVATE]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `__morecore' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `__key_encryptsession_pk_LOCAL' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `__progname_full' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `__ctype32_tolower' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `_environ' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/ld-linux-x86-64.so.2 [0]: normal symbol `_rtld_global' [GLIBC_PRIVATE]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `__progname' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `argp_err_exit_status' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `mallwatch' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `__rcmd_errstr' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/libc.so.6 [0]: normal symbol `svcauthdes_stats' [GLIBC_2.2.5]
 22160: binding file /lib64/libc.so.6 [0] to /lib64/ld-linux-x86-64.so.2 [0]: normal symbol `__libc_enable_secure' [GLIBC_PRIVATE]
 [...]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `__libc_start_main' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `strrchr' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `setlocale' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `bindtextdomain' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `textdomain' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `__cxa_atexit' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `isatty' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `getenv' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `__ctype_b_loc' [GLIBC_2.3]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `__errno_location' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `strtoul' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `ioctl' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `getopt_long' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `malloc' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `memcpy' [GLIBC_2.14]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `strlen' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `opendir' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `readdir' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `closedir' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `free' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `_setjmp' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `strcoll' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `__ctype_get_mb_cur_max' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `fwrite_unlocked' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `exit' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `__fpending' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `fileno' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `__freading' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `fflush' [GLIBC_2.2.5]
 22160: binding file ls [0] to /lib64/libc.so.6 [0]: normal symbol `fclose' [GLIBC_2.2.5]

詳細については、 を参照してくださいman ld.so。

于 2012-09-18T14:40:07.510 に答える
2

nmあなたが求めているものを満たすかもしれません。実行可能ファイルで使用しただけで、シンボルとともにライブラリのバージョンが提供されます。例えば：

U tan@@GLIBC_2.0

そのため、grep を実行して、関心のあるバージョンのみを見つけることができます。

于 2012-09-18T14:40:15.917 に答える