printf

KO | EN

gitlite — search

#react #go #machine-learning #docker #macos #java #windows #awesome #cli #vue #awesome-list #security #ios #openai

(★ 9)

Implementation of the printf function in the FASM assembly language.

printf Latest Version Download

Download Latest Version (.zip)

// repository documentation

Was this content helpful?

★ 0 (0 ratings)

# printf
> https://habr.com/ru/articles/766044/

Implementation of the printf function in the FASM assembly language. An example was also added using the printf function in the C programming language without using the standard library.

### Example

```asm
; main.asm
format ELF64
public _start

extrn printf

section '.data' writeable
    input   db "{ %s, %d%c }", 0xA, 0
    string  db "hello", 0
    decimal dq 571
    symbol  dq '!'

section '.text' executable
_start:
    mov rax, input
    push [symbol]
    push [decimal]
    push string
    call printf
exit:
    mov rax, 60
    xor rdi, rdi 
    syscall 
```

#### Compile & Run

```bash
$ cd examples/asm_only
$ make
> { hello, 571! }
>
```

### Also example with C code

```c
// main.c
typedef long long int int64_t;

extern void c_exit(int ret);
extern int64_t c_printf(char *fmt, ...);

void _start(void) {
    char *string = "hello";
    int64_t decimal = 571;
    char symbol = '!';

int64_t ret = c_printf(
        "{ %s, %d%c }\n",
        string, decimal, symbol
    );
    c_printf("%d\n", ret); // 3

c_exit(0);
}
```

```asm
; c_printf.asm
format ELF64

extrn printf

public c_printf

section '.c_printf' executable
c_printf:
    pop r10

push r9
    push r8
    push rcx
    push rdx
    push rsi

mov rax, rdi
    call printf

pop rsi
    pop rdx
    pop rcx
    pop r8
    pop r9

push r10 
    ret 
```

```asm
; c_exit.asm
format ELF64

public c_exit

section '.c_exit' executable
c_exit:
    mov rax, 60
    syscall 
```

#### Compile & Run

```bash
$ cd examples/asm_to_c
$ make
> { hello, 571! }
>
```

printf

printf Latest Version Download

Today's picks

Was this content helpful?

Recent Feedback

printf

printf Latest Version Download

Today's picks

Was this content helpful?

Recent Feedback

Download README