user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x60,%rsp
  mov    %edi,-0x54(%rbp)
  mov    %rsi,-0x60(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  lea    D27(%rip),%rax
  mov    %rax,-0x40(%rbp)
  movq   $0x0,-0x38(%rbp)
  movq   $0x0,-0x30(%rbp)
  movq   $0x0,-0x28(%rbp)
  movq   $0x0,-0x20(%rbp)
  movl   $0x0,-0x44(%rbp)
  mov    $0x0,%eax
  call   <init@plt>
  cmpl   $0x1,-0x54(%rbp)
  jle    L2
  cmpl   $0x3,-0x54(%rbp)
  jne    L70
  mov    -0x60(%rbp),%rax
  mov    0x10(%rax),%rax
  mov    %rax,-0x38(%rbp)
  mov    -0x38(%rbp),%rax
  mov    %rax,-0x40(%rbp)
L70:
  cmpl   $0x5,-0x54(%rbp)
  jne    L112
  mov    -0x60(%rbp),%rax
  mov    0x10(%rax),%rax
  mov    %rax,-0x30(%rbp)
  mov    -0x60(%rbp),%rax
  mov    0x18(%rax),%rax
  mov    %rax,-0x28(%rbp)
  mov    -0x60(%rbp),%rax
  mov    0x20(%rax),%rax
  mov    %rax,-0x20(%rbp)
L112:
  mov    -0x60(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%rax
  lea    D21(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcmp@plt>
  test   %eax,%eax
  jne    L87
  mov    $0x0,%eax
  call   <read_datafs_from_flash@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rcx
  mov    -0x40(%rbp),%rax
  mov    $0x4000,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <write_file@plt>
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  jmp    L61
L87:
  mov    -0x60(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%rax
  lea    D56(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcmp@plt>
  test   %eax,%eax
  jne    L4
  movl   $0x0,-0x48(%rbp)
  lea    -0x48(%rbp),%rdx
  mov    -0x40(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <read_file@plt>
  mov    %rax,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <write_flash@plt>
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  jmp    L61
L4:
  mov    -0x60(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%rax
  lea    D43(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcmp@plt>
  test   %eax,%eax
  jne    L7
  mov    $0x0,%eax
  call   <save@plt>
  mov    %eax,-0x44(%rbp)
  jmp    L61
L7:
  mov    -0x60(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%rax
  lea    D3(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcmp@plt>
  test   %eax,%eax
  jne    L14
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <load@plt>
  mov    %eax,-0x44(%rbp)
  jmp    L61
L14:
  mov    -0x60(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%rax
  lea    D33(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcmp@plt>
  test   %eax,%eax
  jne    L17
  mov    $0x0,%eax
  call   <erase@plt>
  mov    %eax,-0x44(%rbp)
  jmp    L61
L17:
  mov    $0x0,%eax
  call   <usage@plt>
  jmp    L61
L2:
  mov    $0x0,%eax
  call   <usage@plt>
L61:
  mov    -0x44(%rbp),%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L40
  call   <__stack_chk_fail@plt>
L40:
  leave
  ret
```

tool_calls: name: disassemble_data
arguments: data_label: D27
type_infered: string
name: disassemble_data
arguments: data_label: D21
type_infered: string
name: disassemble_data
arguments: data_label: D56
type_infered: string
name: disassemble_data
arguments: data_label: D43
type_infered: string
name: disassemble_data
arguments: data_label: D3
type_infered: string
name: disassemble_data
arguments: data_label: D33
type_infered: string

tool: D27: -

tool: D21: read_datafs

tool: D56: write_datafs

tool: D43: save

tool: D3: load

tool: D33: erase

assistant: ```c
int main(int argc, char **argv) {
  char *filename = "-";
  char *optarg = NULL;
  char *optarg1 = NULL;
  char *optarg2 = NULL;
  char *optarg3 = NULL;
  int result = 0;
  if (0)
    _dbg("starting(): argc=%d\n", argc);
  init();
  if (0)
    _dbg("argc:%d, argv[0]=%s, argv[1]=%s, argv[2]=%s\n", argc, argv[0], argv[1], argv[2]);
  if (argc >= 2) {
    if (argc == 3)
      filename = optarg = argv[2];
    if (argc == 5) {
      optarg1 = argv[2];
      optarg2 = argv[3];
      optarg3 = argv[4];
    }
    if (0)
      _dbg("filename=%s\n", filename);
    if (!strcmp(argv[1], "read_datafs")) {
      char *buf = read_datafs_from_flash();
      write_file(filename, buf, (1024 * 16));
      free(buf);
    } else if (!strcmp(argv[1], "write_datafs")) {
      int size = 0;
      char *buf = read_file(filename, &size);
      write_flash(buf);
      free(buf);
    } else if (!strcmp(argv[1], "save")) {
      result = save();
    } else if (!strcmp(argv[1], "load")) {
      result = load(optarg);
    } else if (!strcmp(argv[1], "erase")) {
      result = erase();
    } else
      usage();
  } else
    usage();
  return result;
}
```