2022年11月11日 · eax, ebx, ecx and so on are actually registers, which can be seen as "hardware" variables, somewhat similar to higher level-language's variables. Registers can be used in your software directly with instructions such as mov, add or cmp.

lea 0x18b8(%ebx), %eax mov (%eax), %eax mov (%eax), %eax I've done some debugging, and I've figured out that by setting the %ebx register manually when I switch stack frames (using a value I observed before leaving the function in the first place), I fix the bug. I've read that this register deals with "position independent code" in gcc.

2011年3月13日 · %ebx is the status code for the exit system call This means that whatever is stored in %ebx will be returned to the Operating System. Therefore, after executing your application on a terminal, issuing this command:

2013年2月15日 · Been working on an assembly assignment, and for the most part I understand assembly pretty well. Or well at least well enough for this assignment. But this mov statement is tripping me up. I would ...

2016年11月25日 · EBX: "Extended Base" - often used as a pointer to data in the data segment of memory. ECX: "Extended Counter" - often used for loop and string operations, as well as for storing function arguments. EDX: "Extended Data" - often used for I/O operations and for storing function arguments.

2016年10月3日 · EBX does have a few obscure implicit uses that are still relevant in modern code (e.g. CMPXGH8B / CMPXGH16B), but it's the least special register in 32/64-bit code. EBX makes a good choice for a call-preserved register because it's rare that a function will need to save/restore EBX because they need EBX specifically, and not just any non ...

2018年11月18日 · For example, for the write system call, it grabs the file descriptor from ebx, a pointer to the buffer you want to write from ecx and the number of bytes you want to write from edx. The kernel does not know what your intentions are, it just stupidly grabs whatever is in the registers, so it does matters which registers you use.

2024年4月15日 · I need help with filtering in Tibco EBX rest API. I am trying to filter after "technicalDetails" information like lastUpdateDate or lastUpdateUser. As of the current Tibco EBX documentation, I can add the extra technical details using the includeTechnicals=true parameter to the Rest API call. The model I am using looks something like this:

2014年2月12日 · I found that the ESP register is the current stack pointer and EBP is the base pointer for the current stack frame.

2023年12月12日 · Doesn't matter for movsx ebx, bl vs. movsx eax, bl (an execution unit is needed for the data-dependent high bits when sign extending), or for 16 bit register sources on current CPUs. Prefer working with 32-bit values in the first place, like movzx/sx loads.