opcode_开发者

Why does C# compiler emit additional OpCodes in IL?

If I\'ve a method Multiply defined as: public static class Experiment { public static int Multiply(int a, int b)[详细]

2023-04-11 07:49 分类：问答

Casting an unsigned int + a string to an unsigned char vector

I\'m working with the NetLink socket library ( https://sourceforge.net/apps/wordpress/netlinksockets/ ), and I want to send some binary data over the network in a format that I specify.[详细]

2023-04-11 03:15 分类：问答

assembly code embedded in c giving a improper operand type error for cmp

I have made a progr开发者_如何学Pythonam that is supposed to check whether a number is positive, negative, or zero.[详细]

2023-04-04 16:24 分类：问答

Is there an x86 opcode for moving an immediate byte to a direct memory location (without using registers)?

Is there a way to \'mov\'e a specific immediate byte-size number into a direct memory location? I.e. MOV 10h,ffffh[详细]

2023-04-04 11:37 分类：问答

Translation of machinecode into LLVM IR (disassembly / reassembly of X86_64. X86. ARM into LLVM bitcode)

I would like to translate X86_64, x86, ARM executables into LLVM IR (disassem开发者_JAVA技巧bly).[详细]

2023-03-26 10:13 分类：问答

Finding number of operands in an instruction from opcodes

I am planning on writing my own small disassembler. I want to decode the opcodes which I get upon reading the executable. I see the following opcodes:[详细]

2023-03-25 02:57 分类：问答

Direction/Sign Extend bit in the encoding of an x86 opcode

In the x86 instruction set the the bit at index 1 of an opcode can either be the direction bit which specifies what the destination and source operands are or it can be a sign extend bit.[详细]

2023-03-25 01:49 分类：问答

Subset of x86 without a %gs register: binary patching code that uses %gs instead of trapping to emulation?

For reasons too complicated to explain here, I have the need to run a x86 GCC-compiled Linux program on a platform that is a subset of x86. This platform does not have the %gs register,[详细]

2023-03-24 05:48 分类：问答

What is faster: JMP or string of NOPs?

I\'m implementing binary translation and have to deal with sequences of NOPs (0x90) with length ab开发者_C百科out 16 opcodes. Is it better for performance to place JMP (to the end) at start of such se[详细]

2023-03-22 12:41 分类：问答

Decoding and matching Chip 8 opcodes in C/C++

I\'m writing a Chip 8 emulator as an introduction to emulation and I\'m kind 开发者_StackOverflow社区of lost. Basically, I\'ve read a Chip 8 ROM and stored it in a char array in memory. Then, followin[详细]

2023-03-18 09:01 分类：问答