What am I doing wrong with "scanf" ?

When I compiled my actuat_so assembly file's code using

 nasm -f elf64 example.asm -o example.o
gcc -no-pie -m64 example.o -o example

 nasm -f elf64 example.asm -o example.o
gcc -no-pie -m64 example.o -o example

and then run

 ./example

 ./example

it runs good and print:

enter a number:

enter a number:

but then crashes and prints:

 Segmentation fault (core dumped)

 Segmentation fault (core dumped)

That means printf works just fine but scanf is not . What am I doing wrong with scanf then?

Solution:

Troubleshooting Steps: 1) Verify that scanf is linked correctly and the assembly code matches the calling convention. 2) Ensure that you are aligning the stack properly before calling scanf. 3) Check if printf or other functions in your code are causing issues indirectly....

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2 Replies

Solution

Joseph Ogbonna•4mo ago

Marvee Amasi•4mo ago

Thank you @Joseph Ogbonna

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What am I doing wrong with "scanf" ?