When I disassemble c program with gdb, I get error. I googled it but no result found that I want. Can someone help me?
my document first.asm is:
global main main: mov eax, 1 mov ebx, 2 add eax, ebx ret root@kali-linux:~/my-document/test# gdb ./first GNU gdb (Debian 7.12-6) 184.108.40.20661007-git Copyright (C) 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from ./first...(no debugging symbols found)...done. (gdb) set disassembly-flavor intel (gdb) disas main Dump of assembler code for function main: 0x000004f0 <+0>: mov eax,0x1 0x000004f5 <+5>: mov ebx,0x2 0x000004fa <+10>: add eax,ebx 0x000004fc <+12>: ret 0x000004fd <+13>: xchg ax,ax 0x000004ff <+15>: nop End of assembler dump. (gdb) break *0x000004fa Breakpoint 1 at 0x4fa (gdb) run Starting program: /root/my-document/test/first Warning: Cannot insert breakpoint 1. Cannot access memory at address 0x4fa (gdb)
Here is error: enter image description here
I restart disassemble c program with gdb,and I do it with b 4 instead of break*0x000004fa and run the code ,it still can not work!
I think the correct output should be:
(gdb) run Starting program: /root/my-document/test/first Breakpoint 1, 0x000004fa in main() (gdb)
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