secnigma

new info proc mapping

May 10th, 2021 (edited)
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GDB 3.98 KB | None | 0 0
  1. gdb-peda$ target remote 192.168.101.1:9001
  2. Remote debugging using 192.168.101.1:9001
  3. warning: No executable has been specified and target does not support
  4. determining executable automatically.  Try using the "file" command.
  5.  
  6. 0x2bbfb25c in ?? ()
  7.  
  8.  
  9. gdb-peda$ info proc mappings
  10. process 10101
  11. Mapped address spaces:
  12.  
  13.         Start Addr   End Addr       Size     Offset objfile
  14.           0x400000   0x4be000    0xbe000        0x0 /bin/boa
  15.           0x4ce000   0x4d1000     0x3000    0xbe000 /bin/boa
  16.           0x4d1000   0x4d4000     0x3000        0x0
  17.           0x6d2000   0x6dd000     0xb000        0x0 [heap]
  18.         0x2b7aa000 0x2b7af000     0x5000        0x0 /lib/ld-uClibc-0.9.30.3.so
  19.         0x2b7af000 0x2b7b0000     0x1000        0x0
  20.         0x2b7be000 0x2b7bf000     0x1000     0x4000 /lib/ld-uClibc-0.9.30.3.so
  21.         0x2b7bf000 0x2b7c0000     0x1000     0x5000 /lib/ld-uClibc-0.9.30.3.so
  22.         0x2b7c0000 0x2b7c2000     0x2000        0x0 /lib/libomci_api.so
  23.         0x2b7c2000 0x2b7d1000     0xf000        0x0
  24.         0x2b7d1000 0x2b7d2000     0x1000     0x1000 /lib/libomci_api.so
  25.         0x2b7d2000 0x2b891000    0xbf000        0x0 /lib/libmib.so
  26.         0x2b891000 0x2b8a1000    0x10000        0x0
  27.         0x2b8a1000 0x2b8a4000     0x3000    0xbf000 /lib/libmib.so
  28.         0x2b8a4000 0x2b977000    0xd3000        0x0 /lib/librtk.so
  29.         0x2b977000 0x2b986000     0xf000        0x0
  30.         0x2b986000 0x2b9a2000    0x1c000    0xd2000 /lib/librtk.so
  31.         0x2b9a2000 0x2b9a3000     0x1000        0x0
  32.         0x2b9a3000 0x2b9a9000     0x6000        0x0 /lib/libcrypt-0.9.30.3.so
  33.         0x2b9a9000 0x2b9b8000     0xf000        0x0
  34.         0x2b9b8000 0x2b9b9000     0x1000     0x5000 /lib/libcrypt-0.9.30.3.so
  35.         0x2b9b9000 0x2b9ca000    0x11000        0x0
  36.         0x2b9ca000 0x2b9cc000     0x2000        0x0 /lib/libmd5.so
  37.         0x2b9cc000 0x2b9db000     0xf000        0x0
  38.         0x2b9db000 0x2b9dc000     0x1000     0x1000 /lib/libmd5.so
  39.         0x2b9dc000 0x2ba22000    0x46000        0x0 /lib/libssl.so.0.9.8
  40.         0x2ba22000 0x2ba31000     0xf000        0x0
  41.         0x2ba31000 0x2ba34000     0x3000    0x45000 /lib/libssl.so.0.9.8
  42.         0x2ba34000 0x2bb96000   0x162000        0x0 /lib/libcrypto.so.0.9.8
  43.         0x2bb96000 0x2bba6000    0x10000        0x0
  44.         0x2bba6000 0x2bbb8000    0x12000   0x162000 /lib/libcrypto.so.0.9.8
  45.         0x2bbb8000 0x2bbba000     0x2000        0x0
  46.         0x2bbba000 0x2bbc9000     0xf000        0x0 /lib/libpthread-0.9.30.3.so
  47.         0x2bbc9000 0x2bbd8000     0xf000        0x0
  48.         0x2bbd8000 0x2bbdd000     0x5000     0xe000 /lib/libpthread-0.9.30.3.so
  49.         0x2bbdd000 0x2bbdf000     0x2000        0x0
  50.         0x2bbdf000 0x2bbe1000     0x2000        0x0 /lib/libdl-0.9.30.3.so
  51.         0x2bbe1000 0x2bbf0000     0xf000        0x0
  52.         0x2bbf0000 0x2bbf1000     0x1000     0x1000 /lib/libdl-0.9.30.3.so
  53.         0x2bbf1000 0x2bbf2000     0x1000     0x2000 /lib/libdl-0.9.30.3.so
  54.         0x2bbf2000 0x2bc32000    0x40000        0x0 /lib/libuClibc-0.9.30.3.so
  55.         0x2bc32000 0x2bc41000     0xf000        0x0
  56.         0x2bc41000 0x2bc43000     0x2000    0x3f000 /lib/libuClibc-0.9.30.3.so
  57.         0x2bc43000 0x2bc46000     0x3000        0x0
  58.         0x2bc46000 0x2bc57000    0x11000        0x0 /lib/libgcc_s.so.1
  59.         0x2bc57000 0x2bc67000    0x10000        0x0
  60.         0x2bc67000 0x2bc68000     0x1000    0x11000 /lib/libgcc_s.so.1
  61.         0x2bc68000 0x2bc92000    0x2a000        0x0 /lib/libmultilang_en.so
  62.         0x2bc92000 0x2bca1000     0xf000        0x0
  63.         0x2bca1000 0x2bca6000     0x5000    0x29000 /lib/libmultilang_en.so
  64.         0x7fe10000 0x7fe31000    0x21000        0x0 [stack]
  65.         0x7fff7000 0x7fff8000     0x1000        0x0 [vdso]
  66.  
  67. # Now, I can see there is a memory address inside Program counter  (0x27bd0020)
  68. gdb-peda$ x/x $pc
  69. 0x2bbfb25c:     0x27bd0020
  70.  
  71. # However, when I go to  0x27bd0020, it shows the following error
  72. gdb-peda$ x/100 *0x27bd0020
  73. Cannot access memory at address 0x27bd0020
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