user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<left_exclude>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x58,%rsp
  mov    %rdi,-0x78(%rbp)
  mov    %rsi,-0x80(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  mov    %rsp,%rax
  mov    %rax,%rbx
  mov    -0x78(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %rax,-0x68(%rbp)
  mov    -0x80(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %rax,-0x60(%rbp)
  mov    -0x68(%rbp),%rdx
  mov    -0x60(%rbp),%rax
  add    %rdx,%rax
  add    $0x1,%rax
  mov    %rax,-0x58(%rbp)
  movl   $0x0,-0x6c(%rbp)
  mov    -0x58(%rbp),%rax
  mov    %rax,%rdx
  sub    $0x1,%rdx
  mov    %rdx,-0x50(%rbp)
  mov    %rax,%r14
  mov    $0x0,%r15d
  mov    %rax,%r12
  mov    $0x0,%r13d
  mov    $0x10,%edx
  sub    $0x1,%rdx
  add    %rdx,%rax
  mov    $0x10,%esi
  mov    $0x0,%edx
  div    %rsi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L23:
  cmp    %rdx,%rsp
  je     L13
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L23
L13:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L24
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L24:
  mov    %rsp,%rax
  add    $0x0,%rax
  mov    %rax,-0x48(%rbp)
  movl   $0x0,-0x70(%rbp)
  jmp    L17
L21:
  mov    -0x70(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x80(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movsbl %al,%edx
  mov    -0x78(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  call   <strchr@plt>
  test   %rax,%rax
  jne    L7
  mov    -0x70(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x80(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x6c(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x6c(%rbp)
  movzbl (%rcx),%ecx
  mov    -0x48(%rbp),%rdx
  cltq
  mov    %cl,(%rdx,%rax,1)
  mov    -0x48(%rbp),%rdx
  mov    -0x6c(%rbp),%eax
  cltq
  movb   $0x0,(%rdx,%rax,1)
L7:
  addl   $0x1,-0x70(%rbp)
L17:
  mov    -0x70(%rbp),%eax
  cltq
  cmp    %rax,-0x60(%rbp)
  ja     L21
  mov    -0x6c(%rbp),%edx
  mov    -0x48(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  call   <bubble_sort@plt>
  mov    -0x6c(%rbp),%eax
  add    $0x1,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x40(%rbp)
  mov    -0x6c(%rbp),%edx
  mov    -0x48(%rbp),%rcx
  mov    -0x40(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncpy@plt>
  mov    -0x6c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x40(%rbp),%rax
  mov    %rbx,%rsp
  mov    -0x38(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L39
  call   <__stack_chk_fail@plt>
L39:
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
```

assistant: ```c
char *left_exclude(const char srcA[], const char srcB[]) {
  size_t lenA = strlen(srcA);
  size_t lenB = strlen(srcB);
  size_t tempSize = lenA + lenB + 1;
  int i, j, index = 0;
  char temp[tempSize];
  for (i = 0; i < lenB; i++) {
    if (strchr(srcA, srcB[i]) == NULL) {
      temp[index++] = srcB[i];
      temp[index] = '\0';
    }
  }
  bubble_sort(temp, index);
  char *result = (char *)malloc(index + 1);
  strncpy(result, temp, index);
  result[index] = '\0';
  return result;
}
```