Calling c function from x86-64 assembly code (System V AMD64 ABI)

func.c

#include <stdio.h>

void take_many(int a, int b, int c, int d, int e, int f, int g, int h) {
  printf("%d, %d, %d, %d, %d, %d, %d, %d", a, b, c, d, e, f, g, h);
}

main.s

global main
extern take_many

bits 64

section .text
main:
	; take_many(1, 2, 3, 4, 5, 6, 7, 8);
	push 8
	push 7
	mov r9, 6
	mov r8, 5
	mov rcx, 4
	mov rdx, 3
	mov rsi, 2
	mov rdi, 1
	call take_many
	add rsp, 16

	; return 0;
	mov rax, 0
	ret

Makefile

OBJECTS = func.o main.o
CC = gcc
CFLAGS = -std=c11 -m64 -Wall -Wextra -Werror -c
AS = nasm
ASFLAGS = -f elf64

all: $(OBJECTS)
	gcc -m64 $(OBJECTS) -o main

run: all
	./main

%.o: %.c
	$(CC) $(CFLAGS)  $< -o $@

%.o: %.s
	$(AS) $(ASFLAGS) $< -o $@

clean:
	rm -rf $(OBJECTS) main