#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */
typedef int /*<<< orphan*/ pid_t;

/* Variables and functions */
int /*<<< orphan*/ atol(char *);
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ printf(char *);
long syscall(int, int /*<<< orphan*/);
int /*<<< orphan*/ usage();
int main(int argc, char *argv[]) {
  if (argc < 2) {
    usage();
  }
  pid_t target = atol(argv[1]);
  long ret_val = syscall(289, target);
  if (ret_val == -1) {
    printf("Zombify: An error occured.\n");
    exit(-1);
  }
  printf("Zombify sucessful.\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
jge    1177 <main+0x27>
mov    $0x0,%al
call   1050 <usage@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1060 <atol@plt>
mov    %eax,-0x14(%rbp)
mov    -0x14(%rbp),%esi
mov    $0x121,%edi
call   1040 <syscall@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0xffffffffffffffff,-0x20(%rbp)
jne    11b9 <main+0x69>
lea    0xe56(%rip),%rdi
call   1030 <printf@plt>
mov    $0xffffffff,%edi
call   1070 <exit@plt>
lea    0xe5c(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
mov    %rsi,%rbx
cmp    $0x1,%edi
jg     1160 <main+0x10>
xor    %eax,%eax
call   1050 <usage@plt>
mov    0x8(%rbx),%rdi
call   1060 <atol@plt>
mov    $0x121,%edi
mov    %eax,%esi
call   1040 <syscall@plt>
cmp    $0xffffffffffffffff,%rax
je     118b <main+0x3b>
lea    0xe7e(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rbx
ret
lea    0xe81(%rip),%rdi
call   1030 <puts@plt>
mov    $0xffffffff,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@.str = [28 x i8] c"Zombify: An error occured.\0A\00"
@.str.1 = [20 x i8] c"Zombify sucessful.\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i64
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i32, i32* %4
%9 = icmp slt i32 %8, 2
br i1 %9, label %10, label %12
10: ; preds = %2
%11 = call i32 (...) @usage()
br label %12
12: ; preds = %10, %2
%13 = load i8**, i8*** %5
%14 = getelementptr inbounds i8*, i8** %13, i64 1
%15 = load i8*, i8** %14
%16 = call i32 @atol(i8* %15)
store i32 %16, i32* %6
%17 = load i32, i32* %6
%18 = call i64 @syscall(i32 289, i32 %17)
store i64 %18, i64* %7
%19 = load i64, i64* %7
%20 = icmp eq i64 %19, -1
br i1 %20, label %21, label %24
21: ; preds = %12
%22 = call i32 @printf(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str, i64 0, i64 0))
%23 = call i32 @exit(i32 -1)
unreachable
24: ; preds = %12
%25 = call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@str = [19 x i8] c"Zombify sucessful.\00"
@str.2 = [27 x i8] c"Zombify: An error occured.\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %4, label %6
4: ; preds = %2
%5 = tail call i32 (...) @usage()
br label %6
6: ; preds = %4, %2
%7 = getelementptr inbounds i8*, i8** %1, i64 1
%8 = load i8*, i8** %7
%9 = tail call i32 @atol(i8* %8)
%10 = tail call i64 @syscall(i32 289, i32 %9)
%11 = icmp eq i64 %10, -1
br i1 %11, label %12, label %15
12: ; preds = %6
%13 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @str.2, i64 0, i64 0))
%14 = tail call i32 @exit(i32 -1)
unreachable
15: ; preds = %6
%16 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @str, i64 0, i64 0))
ret i32 0
}