Fortem's questions

So my computer is running windows 10 (from windows 7) and I decided to dual-boot it with Ubuntu. I encountered this stubborn problem; I have 2 slots for ddr3 ram and I placed 4GB and 2GB of sticks on them, which was working properly but after some time the task manager on windows shows that I have 2gb of ram on hardware reserved. I tried to check this on htop and it shows the same thing. Is it possible that GRUB is putting the ram on reserved? I tried CMOS reset, some simple configuration on windows 10, running the pc without the gpu, but nothing worked permanently. Is there any solution on this on Ubuntu? Thanks.

    OS Name Microsoft Windows 10 Pro
Version 10.0.18362 Build 18362
Other OS Description    Not Available
OS Manufacturer Microsoft Corporation
System Name NIMITZ
System Manufacturer Gigabyte Technology Co., Ltd.
System Model    To be filled by O.E.M.
System Type x64-based PC
System SKU  To be filled by O.E.M.
Processor   AMD A4-3400 APU with Radeon(tm) HD Graphics, 2700 Mhz, 2 Core(s), 2 Logical Processor(s)
BIOS Version/Date   American Megatrends Inc. FA, 9/21/2012
SMBIOS Version  2.7
Embedded Controller Version 255.255
BIOS Mode   Legacy
BaseBoard Manufacturer  Gigabyte Technology Co., Ltd.
BaseBoard Product   A55M-DS2
BaseBoard Version   x.x
Platform Role   Desktop
Secure Boot State   Unsupported
PCR7 Configuration  Binding Not Possible
Windows Directory   C:\Windows
System Directory    C:\Windows\system32
Boot Device \Device\HarddiskVolume1
Locale  United States
Hardware Abstraction Layer  Version = "10.0.18362.387"
User Name   NIMITZ\Hernandez
Time Zone   Malay Peninsula Standard Time
Installed Physical Memory (RAM) 6.00 GB
Total Physical Memory   3.98 GB
Available Physical Memory   1.17 GB
Total Virtual Memory    5.98 GB
Available Virtual Memory    2.67 GB
Page File Space 2.00 GB
Page File   C:\pagefile.sys
Kernel DMA Protection   Off
Virtualization-based security   Not enabled
Device Encryption Support   Reasons for failed automatic device encryption: TPM is not usable, PCR7 binding is not supported, Hardware Security Test Interface failed and device is not Modern Standby, Un-allowed DMA capable bus/device(s) detected, TPM is not usable
Hyper-V - VM Monitor Mode Extensions    Yes
Hyper-V - Second Level Address Translation Extensions   Yes
Hyper-V - Virtualization Enabled in Firmware    Yes
Hyper-V - Data Execution Protection Yes

So I was currently studying about assembly language and I came across this awesome command on terminal, gcc -S filename.cpp, that produces the assembly code of a C++ source file.

But after I installed NASM and tried to link and compile the .S file (I also tried to use .asm by copy-pasting the code from the .s file), I only ended up facing errors in the terminal.

I am sure there were no errors in the C++ source file because its just a hello world program, but I know that I am missing something and Im hoping someone can point it out for me.

Here is the c++ source code:

#include <iostream>

using namespace std;


int main ()
{

    cout<<"wtf";

    return 0;

}

Here is the .s file code:

.file   "try1.cpp"
    .text
    .section    .rodata
    .type   _ZStL19piecewise_construct, @object
    .size   _ZStL19piecewise_construct, 1
_ZStL19piecewise_construct:
    .zero   1
    .local  _ZStL8__ioinit
    .comm   _ZStL8__ioinit,1,1
.LC0:
    .string "wtf"
    .text
    .globl  main
    .type   main, @function
main:
.LFB1493:
    .cfi_startproc
    pushq   %rbp
    .cfi_def_cfa_offset 16
    .cfi_offset 6, -16
    movq    %rsp, %rbp
    .cfi_def_cfa_register 6
    leaq    .LC0(%rip), %rsi
    leaq    _ZSt4cout(%rip), %rdi
    call    _ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc@PLT
    movl    $0, %eax
    popq    %rbp
    .cfi_def_cfa 7, 8
    ret
    .cfi_endproc
.LFE1493:
    .size   main, .-main
    .type   _Z41__static_initialization_and_destruction_0ii, @function
_Z41__static_initialization_and_destruction_0ii:

    .LFB1977:
    .cfi_startproc
    pushq   %rbp
    .cfi_def_cfa_offset 16
    .cfi_offset 6, -16
    movq    %rsp, %rbp
    .cfi_def_cfa_register 6
    subq    $16, %rsp
    movl    %edi, -4(%rbp)
    movl    %esi, -8(%rbp)
    cmpl    $1, -4(%rbp)
    jne .L5
    cmpl    $65535, -8(%rbp)
    jne .L5
    leaq    _ZStL8__ioinit(%rip), %rdi
    call    _ZNSt8ios_base4InitC1Ev@PLT
    leaq    __dso_handle(%rip), %rdx
    leaq    _ZStL8__ioinit(%rip), %rsi
    movq    _ZNSt8ios_base4InitD1Ev@GOTPCREL(%rip), %rax
    movq    %rax, %rdi
    call    __cxa_atexit@PLT
.L5:
    nop
    leave
    .cfi_def_cfa 7, 8
    ret
    .cfi_endproc
.LFE1977:
    .size   _Z41__static_initialization_and_destruction_0ii, .-_Z41__static_initialization_and_destruction_0ii
    .type   _GLOBAL__sub_I_main, @function
_GLOBAL__sub_I_main:
.LFB1978:
    .cfi_startproc
    pushq   %rbp
    .cfi_def_cfa_offset 16
    .cfi_offset 6, -16
    movq    %rsp, %rbp
    .cfi_def_cfa_register 6
    movl    $65535, %esi
    movl    $1, %edi
    call    _Z41__static_initialization_and_destruction_0ii
    popq    %rbp
    .cfi_def_cfa 7, 8
    ret
    .cfi_endproc
.LFE1978:
    .size   _GLOBAL__sub_I_main, .-_GLOBAL__sub_I_main
    .section    .init_array,"aw"
    .align 8
    .quad   _GLOBAL__sub_I_main
    .hidden __dso_handle
    .ident  "GCC: (Ubuntu 7.4.0-1ubuntu1~18.04.1) 7.4.0"
    .section    .note.GNU-stack,"",@progbits

Here is the error message from the terminal:

    oliver@Nimitz:~$ nasm -f elf64 try1.asm
try1.asm:1: error: attempt to define a local label before any non-local labels
try1.asm:1: error: parser: instruction expected
try1.asm:2: warning: label alone on a line without a colon might be in error [-w+orphan-labels]
try1.asm:2: error: attempt to define a local label before any non-local labels
try1.asm:3: error: attempt to define a local label before any non-local labels
try1.asm:3: error: parser: instruction expected
try1.asm:4: error: attempt to define a local label before any non-local labels
try1.asm:4: error: parser: instruction expected
try1.asm:5: error: attempt to define a local label before any non-local labels
try1.asm:5: error: parser: instruction expected
try1.asm:7: error: parser: instruction expected
try1.asm:8: error: parser: instruction expected
try1.asm:9: error: parser: instruction expected
try1.asm:11: error: parser: instruction expected
try1.asm:12: warning: label alone on a line without a colon might be in error [-w+orphan-labels]
try1.asm:13: error: parser: instruction expected
try1.asm:14: error: parser: instruction expected
try1.asm:17: warning: label alone on a line without a colon might be in error [-w+orphan-labels]
try1.asm:18: error: parser: instruction expected
try1.asm:19: error: parser: instruction expected
try1.asm:20: error: parser: instruction expected
try1.asm:21: error: expression syntax error
try1.asm:22: error: parser: instruction expected
try1.asm:23: error: parser: instruction expected
try1.asm:24: error: symbol `leaq' redefined
try1.asm:24: error: parser: instruction expected
try1.asm:26: error: parser: instruction expected
try1.asm:27: error: parser: instruction expected
try1.asm:28: error: parser: instruction expected
try1.asm:30: warning: label alone on a line without a colon might be in error [-w+orphan-labels]
try1.asm:32: error: parser: instruction expected
try1.asm:33: error: parser: instruction expected
try1.asm:36: warning: label alone on a line without a colon might be in error [-w+orphan-labels]
try1.asm:37: error: symbol `pushq' redefined
try1.asm:37: error: parser: instruction expected
try1.asm:38: error: parser: instruction expected
try1.asm:39: error: parser: instruction expected
try1.asm:40: error: expression syntax error
try1.asm:41: error: parser: instruction expected
try1.asm:42: error: parser: instruction expected
try1.asm:43: error: symbol `movl' redefined
try1.asm:43: error: parser: instruction expected
try1.asm:44: error: symbol `movl' redefined
try1.asm:44: error: parser: instruction expected
try1.asm:45: error: parser: instruction expected
try1.asm:47: error: symbol `cmpl' redefined
try1.asm:47: error: parser: instruction expected
try1.asm:49: error: symbol `leaq' redefined
try1.asm:49: error: parser: instruction expected
try1.asm:51: error: symbol `leaq' redefined
try1.asm:51: error: parser: instruction expected
try1.asm:52: error: symbol `leaq' redefined
try1.asm:52: error: parser: instruction expected
try1.asm:53: error: comma, colon, decorator or end of line expected after operand
try1.asm:53: error: expression syntax error
try1.asm:54: error: expression syntax error
try1.asm:59: error: parser: instruction expected
try1.asm:61: warning: label alone on a line without a colon might be in error [-w+orphan-labels]
try1.asm:63: error: parser: instruction expected
try1.asm:64: error: parser: instruction expected
try1.asm:67: warning: label alone on a line without a colon might be in error [-w+orphan-labels]
try1.asm:68: error: symbol `pushq' redefined
try1.asm:68: error: parser: instruction expected
try1.asm:69: error: parser: instruction expected
try1.asm:70: error: parser: instruction expected
try1.asm:71: error: expression syntax error
try1.asm:72: error: parser: instruction expected
try1.asm:73: error: symbol `movl' redefined
try1.asm:73: error: parser: instruction expected
try1.asm:74: error: symbol `movl' redefined
try1.asm:74: error: parser: instruction expected
try1.asm:76: error: symbol `popq' redefined
try1.asm:76: error: parser: instruction expected
try1.asm:77: error: parser: instruction expected
try1.asm:79: warning: label alone on a line without a colon might be in error [-w+orphan-labels]
try1.asm:81: error: parser: instruction expected
try1.asm:82: error: parser: instruction expected
try1.asm:83: error: parser: instruction expected
try1.asm:84: error: parser: instruction expected
try1.asm:85: error: parser: instruction expected
try1.asm:86: error: parser: instruction expected
try1.asm:87: error: symbol `.section' redefined
try1.asm:87: error: parser: instruction expected
oliver@Nimitz:~$