I've been converting some C code to assembly for my homework; it was going well but I'm having trouble with a for loop for hours. I could not understand where is the problem and decided to ask. I'm posting the part where I'm having trouble of my C-code and assembly-code; every other part of codes act same and the variable values are same. I'm waiting this two codes to act same, but they don't.
I have read where C is first converted to Assembly before its final compilation to binary. Is there a way to do this with Bash commands? I would like the understanding that Assembly allows to Bash somehow.
I'm a C / assembler programmer so am not use to C++, which I need to use. Basically I'm using my own versions of memcpy, but for long and int rather than char. It's for fast graphics. So I have a char array which I copy to another array. But I copy as either longs or ints, much faster. for example
how to compile assembly code in linux? I am using AMD processor code instructions...is that amd registers inbuilt? with what file extension i should give while writing assembly code program?
This is the make step error./tmp/cctiuwxL.s is the make temporary dirictory which is distroyed after the make process finises . The problem is how can I hold the /tmp/cctiuwxL.s dirictory .Then I can check it and find out the proiblem.
Could you please explain the relationship between the languages?For one, is C writing assembly when you compile, does every piece of code end up assembly/hex? Is there a way to convert (?port?) between them?I don't understand much at all of them yet, but I've seen examples where it looks like they are interacting, and an understanding of all of them looks to be important?
i wanna use chmod() in linux x86 [debian 3.7.2 x86] but i have some problem in function argv
look at this function: Code: Select all int chmod(const char *path, mode_t mode);
and mode_t modes: Code: Select all S_ISUID (04000) set-user-ID (set process effective user ID on execve(2))
S_ISGID (02000) set-group-ID (set process effective group ID on execve(2); mandatory locking, as described in fcntl(2); take a new file's group from parent direcق tory, as described in chown(2) and mkdir(2))
[code]...
i know there is some problem in ecx and mode_t value/
I'm reading "Understanding the Linux Kernel" and came upon this assembly instruction: movl $(__KERNEL_CS << 16), %eax I am curious as to what "<<" means/does. I tried to gooogle, but google doesn't search for "<<".
I thought this question's best category would be in the newbie sectionBasically I have a C code, (for simplicity is only prints a few lines), called printx.c that I would like to convert into a binary file so whenever I have to type "printx" in the command line it would execute the programofcourse gcc will give me a binary file if I do a "gcc printx.c", but even the output file (e.g. print.outwould have to be executed following manner./print.outI only ask, because I notice programs like mailx (which is written in C) is a binary file that could be run in this manner (at least that's what I notice on my ubuntu distro)
if the address of stWndClass is 403000h, WHY it would be compile as mov eax,[esi+403004] and the first one would be mov eax,[esi+4]? I know how to get the values 403004h and 4,but do not know why.
I am trying to learn assembly using nasm as assembler. I did not found example related to string operation. I had following example code,
global asm_strlen section .data section .bss section .text
[code].....
my problem is at highlighted line, I am not getting how to copy a byte into 4 byte reg. rather what is syntax of mov instruction to mov byte to WORD DWORD etc.
I was following a simple tutorial on how to program and compile a hello world program using assembly when I got this error;Quote:ld: i386 architecture of input file `hello.o' is incompatible with i386:x86-64 output.The tutorial told me to make two files;Quote:hello.asmsection .data;section declaration
msg db "Hello, world!",0xa;our dear string len equ $ - msg ;length of our dear string section .text;section declaration
I'm working on a project where I am converting a C file to C++. I have worked out 99% of the errors but there is still one lingering one that I cant seem to figure out. I get the following error when compiling with g++
Code: mscp.cpp:749: error: invalid conversion from const void* to move mscp.cpp:750: error: invalid conversion from const void* to move
My problem is to convert an odt file to pdf using php. I wrote an article in odt and I'd want to download it in pdf from my site. I know "fpdf", but it doesn't convert from odt. Someone says to convert from odt to html then to pdf... but some others says NO! Well, do you know a way? (may be also different from odt to pdf, e.g. from latex to pdf).
I wrote the following as our developers won't do it for us! The rest of my programming is in PHP, any ideas on how I can get this into php?I'm in the middle of writing a reminder system which involves importing the customer data and sending out reminder emails.All the script below does is download the current report $FILEIN, compare field number 6 ($DATA) with the date($DATE), if there is a match, it checks each line in the prescription_skus.csv to see if there is a match with field number 1 in the current report. It then outputs the entire line to $FILEOUT
I'm writing the Diffie-Hellman key exchange system using GMP to handle big integers. For the most part, everything works. I can convert the string to mpz_t, set up the keys and everything, and encrypt it fine. Its the decrypting I'm having issues with. What I'm using is mpz_xor() for both. To encrypt I'm doing mpz_xor(buffer, mpz_of_text, secret_key), and to decrypt I'm doing mpz_xor(buffer, mpz_of_cipher, secret_key).
For one character, it semi-works...it'll decrypt it fine, but it'll return it as it's ASCII value (i.e.: if I encrypt "A", it'll decrypt it as 65). Which, I can easily just do sprintf(decrypted_buffer, "%c", 65) for example and be fine. But, when I'm sending text bigger than one character, the encryption for AB gives me something like 1061043 after running the decrypting xor on it.
Has anyone ever done this before or can point me in some directions? Perhaps other algorithms to try? I know XOR isn't the most secure encryption method to use, but at the time I wasn't sure what else to use. I'm really just having a hard time trying to convert a mpz_t to a character string. I've looked at mpz_get_str() and it works before running encryption (i.e.: using mpz_set_str() to create a mpz of a string, then calling mpz_get_str() to change it back). Maybe my XOR method is wrong? Here's the code I'm using:
Code:
/** * str2mpz() * b The current buffer of text to convert [in] * m The mpz_t variable to store converted text [out]
I have to write a code that converts a sequence of 1's and 0's(block) into their equivalent hexa number and copying to another array(byte). but this sequence is not always of length 8 and you are required to send strlen(sequence)%8 bits back into the string. So i've written down this code and it works well with the sample input but fails in the real program.
Code: int Convert_encode( char * block,unsigned char * byte) { int len,iter,i,j,k,sum; char * temp=(char *)malloc(4*sizeof(char)); len=strlen(block)/8;
I am in the process of learning some scripting, however I am running into a roadblock in specifying a certain time format in the array. Ideally I would like to use Here are the lines of text that I am interrogating:
I have log files that everyday are downloaded from my webserver in the format: Code: samplesite.com.xxxxxxxxxxx.gz xxxxxxxxxx is a 10 digit epoch time. I am trying to figure out a way in batch to:
1. find all of exisiting files containing the pattern (after the first run it will only be one a day) 2. Isolate the epoch string 3. convert the epoch string to human readable date/time 4. rename the original file as samplesite.com.mmddYYYY.gz
I am working on a project with a lot of vector math and I'd like to find a way to speed it up.eading about SSE, but I've found no explanation on how to actually use it in code (was looking for some kind of hello-world example, complete with compilation instructions).Does the gcc compiler automatically make use of SSE, if you add the -sse(2,3) option on the command line? Or are their specific functions/libraries you need to call?
i am new to programming world and am trying to understand ARM core. I need an application to help me understand / train assembly language. If anyone knows a good application for this
Is there, by chance, a fancy name to describe code that must be in a program but will never be executed? In one of my (Haskell) programs, I have some error-handling code that must be in the program to keep the compiler happy (due to the type checking). However I know that, due to the logical structure of the program, it is impossible for the code to be evaluated. I am curious if there is a technical name given to code that must exist but cannot be executed.