Join our community of embedded and IoT practitioners to contribute experience, learn new skills and collaborate with other developers with complementary skillsets.
Does anyone understand how to work with `MASKMOVDQU`, cus I’m stuck by it’s instruction from the page 902 of the Intel x64 manual . I am confused on how to […]
In x86 64 machine code, when the `movl` instruction is used with a register destination, it zeroes the higher order bytes of the 64 bit register. How can I use […]
I have implemented a custom memory allocation function using `sys_mmap` for memory allocation. Here’s my code for the `malloc_` function: malloc_: pushq %rbp movq %rsp, %rbp mov %rdi, %rcx # […]
void SysWriteDebugConsole(const char* s) { asm(“mov r0, #0x04\n” // SYS_WRITE0 “mov r1, %[str]\n” “bkpt #0xAB\n” : : [str] “r”(s) : “r0”, “r1”); }
I encountered an issue when injecting my assembly program **asm.txt** into a **portable executable file** to run a keylogger using `CreateThread`. `CreateThread` was failing with the error code `0x3E6 (ERROR_NOACCESS)`. […]
Hi , i’m a student on the university and this is m’y first year on embeded systems branch and we learn about 8085 controlers ans i need a helpful ans […]
Good day everyone, I have gone through the Datasheet and User Manual for my STM32F4 Microcontroller Unit (MCU) in great detail, including PM0214 for STM32F4xx MCUs. Additionally, I have searched […]
I’ve come across a specific instruction sequence that I need help understanding, particularly the comparison (`cmp`) operation and how to break at this point in GDB on an Intel Core […]
I want to inject a 64 bit DLL into a 64 bit process on OpenBSD. The shellcode needs to push several 64 bit values onto the stack, including the old […]
GitHub