Question

I need help writing an x86 assembly language program that asks for a number and prints from 1 to that number using a loop?

Answer 1

X86-64 GCC 9.3 code:

std::ios_base::Init::Init()@plt:

jmp    QWORD PTR [rip+0x2fca]        # 404030 <std::ios_base::Init::Init()@GLIBCXX_3.4>

push   0x3

jmp    401020 <.plt>

std::ostream::operator<<(int)@plt:

jmp    QWORD PTR [rip+0x2fc2]        # 404038 <std::ostream::operator<<(int)@GLIBCXX_3.4>

push   0x4

jmp    401020 <.plt>

std::ios_base::Init::~Init()@plt:

jmp    QWORD PTR [rip+0x2fba]        # 404040 <std::ios_base::Init::~Init()@GLIBCXX_3.4>

push   0x5

jmp    401020 <.plt>

main:

push   rbp

mov    rbp,rsp

sub    rsp,0x10

mov    esi,0x402005

mov    edi,0x404060

call   401050 <std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)@plt>

lea    rax,[rbp-0x8]

mov    rsi,rax

mov    edi,0x404180

call   401030 <std::istream::operator>>(int&)@plt>

mov    DWORD PTR [rbp-0x4],0x1

mov    eax,DWORD PTR [rbp-0x8]

cmp    DWORD PTR [rbp-0x4],eax

jg     4011cb <main+0x59>

mov    eax,DWORD PTR [rbp-0x4]

mov    esi,eax

mov    edi,0x404060

call   401070 <std::ostream::operator<<(int)@plt>

mov    esi,0x402016

mov    rdi,rax

call   401050 <std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)@plt>

add    DWORD PTR [rbp-0x4],0x1

jmp    4011a1 <main+0x2f>

mov    eax,0x0

leave  

ret    

_GLOBAL__sub_I_main:

push   rbp

mov    rbp,rsp

mov    esi,0xffff

mov    edi,0x1

call   4011d2 <__static_initialization_and_destruction_0(int, int)>

pop    rbp

ret    

nop    WORD PTR cs:[rax+rax*1+0x0]

nop

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