CODEWITHSUNDEEP
linuxassemblyprintfnasmx86-64
CXWorks
CXWorks

Reputation: 133

How to set color when calling printf in assembly

I want to set the color when I call printf from assembly.

This is my code:

Out:    
    mov     rdi, answer
    mov     rsi, r10
    mov     rax,0
    call    printf
section .data
    answer:     db       "\033[0;31m%d\033[0m",10,0

I use NASM to compile and gcc to link:

nasm -f elf64 "%f"
gcc -o %e %e.o

However, the output is:

\033[0;31m(my r10)\033[0m

Upvotes: 3

Views: 809

Answers (1)

MikeCAT
MikeCAT

Reputation: 75062

Use ` for surrounding strings to have escape sequence work in NASM.

Reference: 3.4.2 Character Strings

Try this:

Out:
    mov     rdi, answer
    mov     rsi, r10
    mov     rax,0
    call    printf
section .data
    answer:     db       `\033[0;31m%d\033[0m`,10,0

Upvotes: 3

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