Tag: amd64

  • pop an address from the stack..

    GDB shows retq instruction (gdb) disassemble Dump of assembler code for function __read_nocancel: 0x00007fbd743e0e89 : mov $0x0,%eax 0x00007fbd743e0e8e : syscall => 0x00007fbd743e0e90 : cmp $0xfffffffffffff001,%rax 0x00007fbd743e0e96 : jae 0x7fbd743e0ec9 0x00007fbd743e0e98 : retq End of assembler dump. (gdb) Process Involved GPL Ghostscript 8.71. PostScript and PDF language interpreter and previewer. A Screen Shot GPL Ghostscript 8.71…

  • exclusive OR Instruction :-

    GDB shows XOR Instruction (gdb) disassemble 0x00007f16db50b647 Dump of assembler code for function gtk_main: 0x00007f16db50b5a0 : push %r15 0x00007f16db50b5a2 : xor %edi,%edi 0x00007f16db50b5a4 : mov $0x1,%esi 0x00007f16db50b5a9 : push %r14 0x00007f16db50b5ab : push %r13 0x00007f16db50b5ad : push %r12 0x00007f16db50b5af : push %rbp 0x00007f16db50b5b0 : push %rbx 0x00007f16db50b5b1 : sub $0x38,%rsp 0x00007f16db50b5b5 : addl $0x1,0x4e2af4(%rip) #…