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My assembly program reads characters in a text file by loading them one by one in register 'al'. However I sometime need to use rax fully, and I think this causes a partial register stall. Now I think ...
Kun Xiang's user avatar
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-1 votes
0 answers
69 views

I'm trying to make a C++/CLI dll to wrap a managed assembly so it can be called from VBA inside Excel (I specifically want to avoid using COM). It shall only support 64 bit. I have based my test code ...
Chr Jensen's user avatar
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0 answers
72 views

I'm writing a 64-bit Windows DLL that needs to locate, on the stack, the return address that belongs to the host EXE (the place in the EXE that called into my DLL). The EXE loads my DLL and eventually ...
upe's user avatar
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8 votes
1 answer
230 views

I'm working on an application that uses shared memory sections between processes on Windows (for an IPC mechanism between processes, where one process generates code that is executed by another ...
kresh11's user avatar
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1 vote
0 answers
163 views

I did change in Form's properties, it change the icon in the taskbar but not the execuable file. I went to Project -> Options -> Application -> Icons did create a icon using art generator, as ...
user834697's user avatar
  • 303
1 vote
1 answer
159 views

I have a code in assembly x86_64 that gets the kernel32.dll base through accessing the PEB and bla bla bla, gets the GetProcAddress address, uses that for getting the LoadLibraryA function and then i ...
omar dans castro's user avatar
  • 29
4 votes
0 answers
86 views

I am building assembly x64 functions, compiler microsoft ml64 which comes with VisualStudio. It comes that I can't do bitwise operation on 64 bit registers when I specify a value larger than 32 bit, ...
armagedescu's user avatar
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0 votes
0 answers
48 views

By using 64-bit DLL (x64) for SQLite version from here and documentation from here i'm trying to use Sqlite in Fasm for of course quite reasonable reasons. When trying to sqlite3_open a new db file ...
Alexandr's user avatar
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0 votes
0 answers
26 views

Writing a c compiler that generates MASM and uses ml64 to assemble and link. I read a lot about the x64 windows calling convention and it seemed that I did not have to add all the SEH plumbing, in ...
pm100's user avatar
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0 votes
1 answer
689 views

I'm facing an issue when trying to use FFmpeg in my .NET Framework 4.8 application (64-bit) with FFmpeg.AutoGen 7.0. When I try to call any FFmpeg method, such as ffmpeg.av_version_info() in the ...
auetic's user avatar
  • 31
4 votes
2 answers
389 views

I want to portably work with 64-bit signed types in C. However - I know that int64_t is not guaranteed to be defined. I can use some preprocessor magic in my build system generation (e.g. CMake's ...
einpoklum's user avatar
  • 137k
0 votes
0 answers
78 views

I'm compiling for the x86_64 architecture using Apple Clang (Xcode 14). In the following code: #include <iostream> #include <stdint.h> static void foo( long v ) { std::cout << v;...
JWWalker's user avatar
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3 votes
3 answers
197 views

2038 is coming...I have to think date time in 64 bit! I'm trying to understand how to do this in C++, with chrono library, but I'm failing miserably so far. I will have to communicate a date time ...
Kite's user avatar
  • 429
0 votes
1 answer
175 views

Im trying to set a instrumentation callback on another process but it gives me 0xc000000d (STATUS_INVALID_PARAMETER) but if I set it on the current process then it succeeds. Does anyone know what I am ...
user24684540's user avatar
  • 33
1 vote
2 answers
247 views

Our program is acting weird. Using Delphi 11, we are building a program where the target platform is 64 bit. Every setting we have checked would point to a 64 bit result. However, when we run the ...
justaguy2278's user avatar
  • 13
1 vote
1 answer
93 views

I need to have several hundred functions written in assembler. They will be statically linked into an executable. I only want the functions that are actually referenced to be included in the ...
mealnor's user avatar
  • 127
1 vote
0 answers
107 views

I am trying to get some good codegen for a Rust binary in x64 but it seems very hard to get simd operations for exp. I have a simplified code example: https://godbolt.org/z/4MY34T1zj The code should ...
benjamin-lieser's user avatar
  • 1,888
2 votes
1 answer
92 views

when i sum two numbers like (1111 1111 1111 1111)h + (1111 1111 1111 1111)h it display the result is (2000 20000 2000 2000)h where the true result is (2222 2222 2222 2222)h ;the code .model small ....
Az4iz's user avatar
  • 21
1 vote
0 answers
99 views

I am writing x64 assembly code to invoke VirtualAllocEx win32 API (as part of process injection lab, so I am injecting into explorer.exe) and seeing unusual (to me) behavior. The documentation states ...
ab ab's user avatar
  • 11
1 vote
0 answers
47 views

comparing these two assembly instructions generated by compiler: 1. mov ebx, 1 cmp edi, ebx jl SHORT $LN3@main npad 7 $LL4@main: mov eax, edi cdq idiv ebx test edx, edx je ...
arsha_ex's user avatar
  • 128
4 votes
0 answers
100 views

Disclaimer: I'm familiar with IEEE 754 floating point numbers and know that they have signed zeroes and other special values. That is not the question. If you enjoy language lawyering, read on. We ...
Heinzi's user avatar
  • 173k
1 vote
1 answer
62 views

I found that the ES selector field is 0x0800 but shouldn’t it be 0x0806 since it’s the 3rd index in the list CS, SS, DS, ES, FS, GS, LDTR, TR I got the selector list from Volume 3C: System Programming ...
Joe mama's user avatar
  • 13
0 votes
1 answer
77 views

Is there any possibility to use RET function to go back from the conditional statement to the main function (_start) where it was called from and go on with the next instructions? Right now, it's just ...
RudyChemik's user avatar
  • 33
-1 votes
1 answer
405 views

I wrote some code to compare the value of xmm10 and xmm6 using: comiss xmm10, xmm6 and then comisd xmm10, xmm6 The first one works, and the second one doesn't. I tried using subss xmm10, xmm6 followed ...
Angad Warhadpande's user avatar
  • 9
0 votes
1 answer
38 views

Why the output is in diffrent order than it is declared? Shouldnt the output be in this order? aaaa bbbb cccc Instead it is: I assume the issue is in assigning "bbb" value to the text ...
RudyChemik's user avatar
  • 33

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