user: 请从给定的汇编指令推导出C源代码：

```asm
<readgrey>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    %rdx,-0x38(%rbp)
  mov    %rcx,-0x40(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x0,-0x1c(%rbp)
  movl   $0x0,-0x14(%rbp)
  movq   $0x0,-0x10(%rbp)
  lea    -0x1c(%rbp),%rcx
  mov    -0x40(%rbp),%rdx
  mov    -0x38(%rbp),%rsi
  mov    -0x28(%rbp),%rax
  mov    %rax,%rdi
  call   <readDIMs@plt>
  test   %rax,%rax
  je     L50
  lea    D18(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0xffffffff,%eax
  jmp    L105
L50:
  lea    D9(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    -0x1c(%rbp),%ecx
  mov    -0x40(%rbp),%rax
  mov    (%rax),%edx
  mov    -0x38(%rbp),%rax
  mov    (%rax),%eax
  mov    %eax,%esi
  lea    D68(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    -0x38(%rbp),%rax
  mov    (%rax),%eax
  test   %eax,%eax
  jg     L1
  lea    D52(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0xffffffff,%eax
  jmp    L105
L1:
  mov    -0x40(%rbp),%rax
  mov    (%rax),%eax
  test   %eax,%eax
  jg     L119
  lea    D30(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0xffffffff,%eax
  jmp    L105
L119:
  mov    -0x38(%rbp),%rax
  mov    (%rax),%edx
  mov    -0x40(%rbp),%rax
  mov    (%rax),%eax
  imul   %edx,%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x14(%rbp),%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x14(%rbp),%eax
  mov    %eax,%esi
  lea    D50(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  cmpq   $0x0,-0x10(%rbp)
  jne    L91
  lea    D70(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0xffffffff,%eax
  jmp    L105
L91:
  mov    -0x14(%rbp),%edx
  mov    -0x10(%rbp),%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  movl   $0x0,-0x18(%rbp)
  movb   $0x0,-0x1d(%rbp)
  jmp    L77
L97:
  mov    -0x28(%rbp),%rdx
  lea    -0x1d(%rbp),%rax
  mov    %rdx,%rcx
  mov    $0x1,%edx
  mov    $0x1,%esi
  mov    %rax,%rdi
  call   <fread@plt>
  movzbl -0x1d(%rbp),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isprint@plt>
  test   %rax,%rax
  je     L37
  movzbl -0x1d(%rbp),%eax
  movsbl %al,%eax
  jmp    L78
L37:
  mov    $0x2e,%eax
L78:
  movzbl -0x1d(%rbp),%edx
  movsbl %dl,%edx
  mov    -0x18(%rbp),%esi
  mov    %eax,%ecx
  lea    D11(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    -0x18(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x10(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x1d(%rbp),%eax
  mov    %al,(%rdx)
  addl   $0x1,-0x18(%rbp)
L77:
  mov    -0x18(%rbp),%eax
  cmp    -0x14(%rbp),%eax
  jl     L97
  mov    -0x30(%rbp),%rax
  mov    -0x10(%rbp),%rdx
  mov    %rdx,(%rax)
  mov    -0x14(%rbp),%eax
L105:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L89
  call   <__stack_chk_fail@plt>
L89:
  leave
  ret
```

tool_calls: name: extract_symbolic_data
arguments: data_tag: D18
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D9
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D68
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D52
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D30
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D50
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D70
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D11
type_infered: string

tool: D18: could not read DIMS

tool: D9: read grey

tool: D68: w:%d h:%d i:%d


tool: D52: Invalid width

tool: D30: Invalid height

tool: D50: arraysze:%d


tool: D70: Failed to allocate memory, Possibly out of memory

tool: D11: DBG: Idx = %d, char = (%02x) %c


assistant: ```c
int readgrey(FILE *imgfile, char **image_data, int *width, int *height) {
  int intensity = 0;
  int arraysze = 0;
  char *imagedata = NULL;
  if (readDIMs(imgfile, width, height, &intensity) != 0) {
    printf("could not read DIMS\n");
    return -1;
  }
  printf("read grey\n");
  printf("w:%d h:%d i:%d\n", *width, *height, intensity);
  if (*width < 1) {
    printf("Invalid width\n");
    return -1;
  }
  if (*height < 1) {
    printf("Invalid height\n");
    return -1;
  }
  arraysze = (*width) * (*height);
  imagedata = (char *)malloc(sizeof(char) * arraysze);
  printf("arraysze:%d\n", arraysze);
  if (imagedata == NULL) {
    printf("Failed to allocate memory, Possibly out of memory\n");
    return -1;
  }
  memset(imagedata, 0, sizeof(char) * arraysze);
  {
    int idxrd = 0;
    char c = 0;
    for (; idxrd < arraysze; ++idxrd) {
      fread(&c, 1, 1, imgfile);
      printf("DBG: Idx = %d, char = (%02x) %c\n", idxrd, c, (isprint(c) ? c : '.'));
      imagedata[idxrd] = c;
    }
  }
  *image_data = imagedata;
  return arraysze;
}
```