user: 下面的汇编指令对应的C源代码是什么:

```asm
<zskip_block>:
  endbr64
  push   %r12
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  sub    $0x10,%rsp
  mov    (%rdi),%rdx
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  mov    %rsp,%r12
  mov    %rdx,(%rsp)
  movzbl (%rdx),%eax
  nopl   0x0(%rax)
L155:
  cmp    $0xbe,%al
  je     L99
L31:
  cmp    $0xde,%al
  je     L121
  cmp    $0xb0,%al
  je     L197
  mov    %r12,%rdi
  call   <zskip_expr@plt>
  mov    %r12,%rdi
  call   <zskip_assign@plt>
  mov    (%rsp),%rdx
  movzbl (%rdx),%eax
  cmp    $0xbe,%al
  jne    L31
L99:
  cmpb   $0x1,0x1(%rdx)
  je     L171
  lea    0x1(%rdx),%rcx
  mov    %rcx,(%rsp)
  movzbl 0x1(%rdx),%eax
  lea    -0x2(%rax),%esi
  cmp    $0x1,%sil
  jbe    L58
  cmp    $0x4,%al
  je     L190
  mov    %rcx,%rdx
  jmp    L155
  nopw   0x0(%rax,%rax,1)
L58:
  lea    0x3(%rdx),%rcx
  mov    %rcx,(%rsp)
  movzbl 0x3(%rdx),%eax
  mov    %rcx,%rdx
  jmp    L155
  nopl   0x0(%rax)
L121:
  lea    0x1(%rdx),%rbx
  mov    %rbx,(%rsp)
  cmpb   $0x0,0x1(%rdx)
  je     L208
  cs nopw 0x0(%rax,%rax,1)
L105:
  mov    %rbx,%rdi
  call   <strlen@plt>
  lea    0x1(%rbx,%rax,1),%rbx
  mov    %rbx,(%rsp)
  cmpb   $0x0,(%rbx)
  jne    L105
L208:
  lea    0x1(%rbx),%rdx
  mov    %rdx,(%rsp)
  movzbl 0x1(%rbx),%eax
  jmp    L155
  nopw   0x0(%rax,%rax,1)
L197:
  lea    0x1(%rdx),%rcx
  mov    %rcx,(%rsp)
  movzbl 0x1(%rdx),%eax
  cmp    $0x1,%al
  jne    L15
  jmp    L83
  nopl   (%rax)
L46:
  movzbl 0x1(%rcx),%eax
  cmp    $0x2,%al
  jne    L52
  add    $0x2,%rcx
  mov    %rcx,(%rsp)
L10:
  mov    %r12,%rdi
  call   <zskip_expr@plt>
  mov    %r12,%rdi
  call   <zskip_block>
  mov    (%rsp),%rcx
  movzbl (%rcx),%eax
L15:
  cmp    $0xb0,%al
  je     L46
  cmp    $0x4,%al
  je     L230
  mov    %rcx,%rdx
  cmp    $0x5,%al
  jne    L155
  lea    0x1(%rcx),%rbx
  mov    %rbx,(%rsp)
  nopw   0x0(%rax,%rax,1)
L19:
  mov    %rbx,%rdi
  call   <strlen@plt>
  lea    0x1(%rbx,%rax,1),%rbx
  mov    %rbx,(%rsp)
  cmpb   $0x0,(%rbx)
  jne    L19
  add    $0x1,%rbx
  mov    %r12,%rdi
  mov    %rbx,(%rsp)
  call   <zskip_block>
  mov    (%rsp),%rdx
  movzbl (%rdx),%eax
  jmp    L155
  nopw   0x0(%rax,%rax,1)
L171:
  add    $0x2,%rdx
  mov    %rdx,0x0(%rbp)
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L91
  add    $0x10,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
  nopl   (%rax)
L190:
  add    $0x2,%rdx
  mov    %r12,%rdi
  mov    %rdx,(%rsp)
  call   <zskip_expr@plt>
  mov    (%rsp),%rdx
  movzbl (%rdx),%eax
  jmp    L155
  nopl   0x0(%rax)
L52:
  cmp    $0x3,%al
  je     L152
  mov    $0xffffffb0,%eax
  mov    %rcx,%rdx
  jmp    L31
  nopl   0x0(%rax)
L83:
  add    $0x2,%rdx
  mov    %rdx,(%rsp)
  jmp    L10
  nopl   (%rax)
L230:
  add    $0x1,%rcx
  mov    %r12,%rdi
  mov    %rcx,(%rsp)
  call   <zskip_expr@plt>
  mov    %r12,%rdi
  call   <zskip_block>
  mov    (%rsp),%rdx
  movzbl (%rdx),%eax
  jmp    L155
L152:
  add    $0x2,%rcx
  mov    %r12,%rdi
  mov    %rcx,(%rsp)
  call   <zskip_block>
  mov    (%rsp),%rdx
  movzbl (%rdx),%eax
  jmp    L155
L91:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void zskip_block(char **entry) {
  char *cursor = *entry;
  while (*cursor != (char)0xBE || *(cursor + 1) != (char)0x01) {
    if (*cursor == (char)0xBE) {
      cursor++;
      if (*cursor == (char)0x02 || *cursor == (char)0x03)
        cursor += 2;
      else if (*cursor == (char)0x04) {
        cursor++;
        zskip_expr(&cursor);
      }
    } else if (*cursor == (char)0xDE) {
      cursor++;
      while (*cursor != '\0')
        cursor += strlen(cursor) + 1;
      cursor++;
    } else if (*cursor == (char)0xB0) {
      cursor++;
      if (*cursor == (char)0x01) {
        cursor++;
        zskip_expr(&cursor);
        zskip_block(&cursor);
      }
      while (*cursor == (char)0xB0 && *(cursor + 1) == (char)0x02) {
        cursor += 2;
        zskip_expr(&cursor);
        zskip_block(&cursor);
      }
      if (*cursor == (char)0xB0 && *(cursor + 1) == (char)0x03) {
        cursor += 2;
        zskip_block(&cursor);
      } else if (*cursor == (char)0x04) {
        cursor++;
        zskip_expr(&cursor);
        zskip_block(&cursor);
      } else if (*cursor == (char)0x05) {
        cursor++;
        cursor += strlen(cursor) + 1;
        while (*cursor != '\0')
          cursor += strlen(cursor) + 1;
        cursor++;
        zskip_block(&cursor);
      }
    } else {
      zskip_expr(&cursor);
      zskip_assign(&cursor);
    }
  }
  cursor += 2;
  *entry = cursor;
}
```