I need to create a code that prints the position of a search string. My current output with this code is :

Enter the search string: o

Enter the Input string to search: hello world.

string found at position: $4$

segmentation fault $($core dumped$)$

The output should be:

Enter the search string: o

Enter the Input string to search: hello world.

string found at position: $4$

string found at postion: $7$

section $.$data

promptSearch db "Enter the search string: $",0$

promptInput db "Enter the input string to search: $",0$

searchFormat db $"\%999$s$",0$

inputFormat db $"\%4999$s$",0$

foundMsg db "String found at position: $\%$d$",10,0$

notFoundMsg db "String not found", $10,0$

section $.$bss

searchString resb $1000$

inputString resb $5000$

section $.$text

global main

extern printf

extern exit

extern strstr

extern scanf

main:

; Prompting user for the search string

mov rdi, promptSearch

xor rax, rax

call printf

; Reading search string

mov rdi, searchFormat

mov rsi, searchString

xor rax, rax ; Clear RAX before scanf

call scanf

; Prompting user for the input string

mov rdi, promptInput

xor rax, rax

call printf

; Reading input string

mov rdi, inputFormat

mov rsi, inputString

xor rax, rax ; Clear RAX before scanf

call scanf

search$\_$loop:

; Searching for the search string in the input string

mov rdi, inputString

mov rsi, searchString

call strstr

test rax, rax

jz search$\_$not$\_$found

search$\_$found:

; Calculating the position of the found substring

sub rax, inputString

mov rsi, rax

; Printing message for found string

mov rdi, foundMsg

xor rax, rax

call printf

; Update inputString to point to the character after the last found occurrence

add rsi, $1$ ; Move inputString pointer to the next character

add rsi, rax ; Move inputString pointer to the character after the last found occurrence

; Check if we've reached the end of the input string

cmp byte $[$rsi$],0$

je end

; Continue searching if there is more input to search

jmp search$\_$loop

search$\_$not$\_$found:

; Printing message for not found

mov rdi, notFoundMsg

xor rax, rax

call printf

end:

; Exiting the program

mov rdi, $0$

call exit