Reubicación truncada para ajustarse a error en el ensamblaje

programación


Estoy intentando crear un programa que determine si un número es primo o no en ensamblador x64 usando wsl este es el código:

global main
section .data
    input_number dq 17
    newline db 0xA
    prime_msg db "The number is prime"
    not_prime_msg db "The number is not prime"

section .text
    
main:
    mov rdi, input_number

    ; Preserve rdi
    push rdi

    call is_prime

    ; Restore rdi
    pop rdi

    ; Exit the program
    mov rax, 60
    xor rdi, rdi
    syscall

is_prime:
    ; Function to check if a number is prime
    ; Check if the number is less than 2
    cmp rdi, 2
    jl not_prime

    ; Loop to check divisors from 2 to the square root of the number
    mov rcx, 2
check_next_divisor:
    mov rax, rdi  ; Copy the number to rax
    xor rdx, rdx  ; Clear any previous remainder
    div rcx       ; Divide rax by rcx, quotient in rax, remainder in rdx

    ; Check if the remainder is zero
    test rdx, rdx
    je not_prime  ; If yes, it's not a prime number

    inc rcx

    ; Check if the divisor is greater than the square root of the number
    mov rax, rcx
    mul rax
    cmp rax, rdi
    jg prime  ; If the divisor is greater than the square root, it's a prime number

    jmp check_next_divisor

prime:
    ; Print message for a prime number
    mov rax, 1
    mov rdi, 1
    mov rsi, prime_msg
    mov rdx, 40  ; Adjust the length of the message if needed
    syscall

    ; Set zero flag to indicate it is prime
    ret

not_prime:
    ; Print message for a non-prime number
    mov rax, 1
    mov rdi, 1
    mov rsi, not_prime_msg
    mov rdx, 40  ; Adjust the length of the message if needed
    syscall

    ; Set carry flag to indicate it is not prime
    stc
    ret
and i got these errors:
ld: warning: cannot find entry symbol _start; defaulting to 0000000000401000
1.o: in function `prime_msg':
1.asm:(.data+0x1c): relocation truncated to fit: R_X86_64_8 against `.data'
1.o: in function `not_prime_msg':
1.asm:(.data+0x34): relocation truncated to fit: R_X86_64_8 against `.data'

Lo que he probado:

Recibí estos errores:

ld: warning: cannot find entry symbol _start; defaulting to 0000000000401000
1.o: in function `prime_msg':
1.asm:(.data+0x1c): relocation truncated to fit: R_X86_64_8 against `.data'
1.o: in function `not_prime_msg':
1.asm:(.data+0x34): relocation truncated to fit: R_X86_64_8 against `.data'

Solución 1

El primer mensaje te dice que no has definido un start etiqueta para el punto de entrada principal del programa. Los demás indican que los operandos son demasiado largos para registrarse. rsi. Debe consultar la documentación del ensamblador y de la CPU para descubrir el motivo. Ha pasado algún tiempo desde que escribí mucho ensamblador, pero si no recuerdo mal, necesitas usar el offset operador en esas líneas:

MAPE
    mov rsi, offset prime_msg

; ...

    mov rsi, offset not_prime_msg

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