ylfeng/ReF-Decompile-dataset huggingface dataset:
user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<ProcExtsFromExtString>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x118,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x108(%rsp)
  xor    %eax,%eax
  call   <strlen@plt>
  cmpb   $0x0,(%rbx)
  jne    L75
L9:
  mov    0x108(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L73
  add    $0x118,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  xchg   %ax,%ax
L75:
  mov    %rax,%rbp
  mov    %rbx,%r15
  mov    %rsp,%r14
L52:
  mov    $0x20,%esi
  mov    %r15,%rdi
  call   <strchr@plt>
  mov    %rax,%r12
  test   %rax,%rax
  je     L63
  mov    %rax,%r13
  sub    %r15,%r13
  mov    %r13d,%edx
  cmp    $0xff,%r13d
  jg     L9
  mov    %r15,%rsi
  mov    %r14,%rdi
  lea    0x1(%r12),%r15
  movslq %r13d,%r13
  call   <strncpy@plt>
  mov    %r14,%rdi
  movb   $0x0,(%rsp,%r13,1)
  call   <LoadExtByName@plt>
  cmpb   $0x0,0x1(%r12)
  je     L9
  jmp    L52
  xchg   %ax,%ax
L63:
  add    %rbp,%rbx
  sub    %r15,%rbx
  mov    %ebx,%edx
  cmp    $0xff,%ebx
  jg     L9
  mov    %rsp,%rbp
  mov    %r15,%rsi
  movslq %ebx,%rbx
  mov    %rbp,%rdi
  call   <strncpy@plt>
  mov    %rbp,%rdi
  movb   $0x0,(%rsp,%rbx,1)
  call   <LoadExtByName@plt>
  jmp    L9
L73:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void ProcExtsFromExtString(const char *strExtList) {
  size_t iExtListLen = strlen(strExtList);
  const char *strExtListEnd = strExtList + iExtListLen;
  const char *strCurrPos = strExtList;
  char strWorkBuff[256];
  while (*strCurrPos) {
    int iStrLen = 0;
    const char *strEndStr = strchr(strCurrPos, ' ');
    int iStop = 0;
    if (strEndStr == NULL) {
      strEndStr = strExtListEnd;
      iStop = 1;
    }
    iStrLen = (int)((ptrdiff_t)strEndStr - (ptrdiff_t)strCurrPos);
    if (iStrLen > 255)
      return;
    strncpy(strWorkBuff, strCurrPos, iStrLen);
    strWorkBuff[iStrLen] = '\0';
    LoadExtByName(strWorkBuff);
    strCurrPos = strEndStr + 1;
    if (iStop)
      break;
  }
}
```
user: 这段汇编代码用C语言表示是什么样的?

```asm
<free_Similarity_mat>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %esi,-0x1c(%rbp)
  mov    -0x1c(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0x4(%rbp)
  jmp    L17
L8:
  mov    -0x4(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  mov    %rax,%rdi
  call   <free@plt>
  subl   $0x1,-0x4(%rbp)
L17:
  cmpl   $0x0,-0x4(%rbp)
  jns    L8
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  nop
  leave
  ret
```

assistant: ```c
void free_Similarity_mat(int **matrix, int dim1) {
  int i;
  for (i = dim1 - 1; i >= 0; i--)
    free(matrix[i]);
  free(matrix);
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<free_Similarity_mat>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%rbp
  sub    $0x1,%esi
  js     L6
  movslq %esi,%rbx
L17:
  mov    0x0(%rbp,%rbx,8),%rdi
  call   <free@plt>
  sub    $0x1,%rbx
  test   %ebx,%ebx
  jns    L17
L6:
  mov    %rbp,%rdi
  call   <free@plt>
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  ret
```

assistant: ```c
void free_Similarity_mat(int **matrix, int dim1) {
  int i;
  for (i = dim1 - 1; i >= 0; i--)
    free(matrix[i]);
  free(matrix);
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<free_Similarity_mat>:
  endbr64
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  sub    $0x8,%rsp
  sub    $0x1,%esi
  js     L9
  movslq %esi,%rbx
  nopl   (%rax)
L6:
  mov    0x0(%rbp,%rbx,8),%rdi
  sub    $0x1,%rbx
  call   <free@plt>
  test   %ebx,%ebx
  jns    L6
L9:
  add    $0x8,%rsp
  mov    %rbp,%rdi
  pop    %rbx
  pop    %rbp
  jmp    1050 <free@plt>
```

assistant: ```c
void free_Similarity_mat(int **matrix, int dim1) {
  int i;
  for (i = dim1 - 1; i >= 0; i--)
    free(matrix[i]);
  free(matrix);
}
```
user: 这段汇编代码用C语言表示是什么样的?

```asm
<free_Similarity_mat>:
  endbr64
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  sub    $0x8,%rsp
  sub    $0x1,%esi
  js     L0
  movslq %esi,%rbx
  nopl   (%rax)
L16:
  mov    0x0(%rbp,%rbx,8),%rdi
  sub    $0x1,%rbx
  call   <free@plt>
  test   %ebx,%ebx
  jns    L16
L0:
  add    $0x8,%rsp
  mov    %rbp,%rdi
  pop    %rbx
  pop    %rbp
  jmp    1050 <free@plt>
```

assistant: ```c
void free_Similarity_mat(int **matrix, int dim1) {
  int i;
  for (i = dim1 - 1; i >= 0; i--)
    free(matrix[i]);
  free(matrix);
}
```
user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<string_do_convert>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %esi,-0x1c(%rbp)
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <locale_str_buflen@plt>
  mov    %rax,-0x8(%rbp)
  mov    -0x8(%rbp),%rdx
  mov    -0x1c(%rbp),%ecx
  mov    -0x18(%rbp),%rax
  mov    %ecx,%esi
  mov    %rax,%rdi
  call   <string_do_convert_length@plt>
  leave
  ret
```

assistant: ```c
char *string_do_convert(const char *in, iconv_t ic) {
  size_t in_sz = locale_str_buflen(in);
  return string_do_convert_length(in, ic, in_sz);
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<string_do_convert>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%rbx
  mov    %esi,%ebp
  call   <locale_str_buflen@plt>
  mov    %rax,%rdx
  mov    %ebp,%esi
  mov    %rbx,%rdi
  call   <string_do_convert_length@plt>
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  ret
```

assistant: ```c
char *string_do_convert(const char *in, iconv_t ic) {
  size_t in_sz = locale_str_buflen(in);
  return string_do_convert_length(in, ic, in_sz);
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<string_do_convert>:
  endbr64
  push   %r12
  mov    %esi,%r12d
  push   %rbp
  mov    %rdi,%rbp
  sub    $0x8,%rsp
  call   <locale_str_buflen@plt>
  add    $0x8,%rsp
  mov    %r12d,%esi
  mov    %rbp,%rdi
  mov    %rax,%rdx
  pop    %rbp
  pop    %r12
  jmp    1060 <string_do_convert_length@plt>
```

assistant: ```c
char *string_do_convert(const char *in, iconv_t ic) {
  size_t in_sz = locale_str_buflen(in);
  return string_do_convert_length(in, ic, in_sz);
}
```
user: What would the C source look like for the assembly code provided here:

```asm
<string_do_convert>:
  endbr64
  push   %r12
  mov    %esi,%r12d
  push   %rbp
  mov    %rdi,%rbp
  sub    $0x8,%rsp
  call   <locale_str_buflen@plt>
  add    $0x8,%rsp
  mov    %r12d,%esi
  mov    %rbp,%rdi
  mov    %rax,%rdx
  pop    %rbp
  pop    %r12
  jmp    1060 <string_do_convert_length@plt>
```

assistant: ```c
char *string_do_convert(const char *in, iconv_t ic) {
  size_t in_sz = locale_str_buflen(in);
  return string_do_convert_length(in, ic, in_sz);
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<string_to_int>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  movl   $0x0,-0x4(%rbp)
  movl   $0x0,-0x8(%rbp)
  jmp    L0
L14:
  mov    -0x4(%rbp),%edx
  mov    %edx,%eax
  shl    $0x2,%eax
  add    %edx,%eax
  add    %eax,%eax
  mov    %eax,%ecx
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  sub    $0x30,%eax
  add    %ecx,%eax
  mov    %eax,-0x4(%rbp)
  addl   $0x1,-0x8(%rbp)
L0:
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L14
  mov    -0x4(%rbp),%eax
  pop    %rbp
  ret
```

assistant: ```c
int string_to_int(char *string) {
  int i, n;
  n = 0;
  for (i = 0; string[i] != '\0'; i++)
    n = (n * 10) + (string[i] - '0');
  return n;
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<string_to_int>:
  endbr64
  movzbl (%rdi),%eax
  test   %al,%al
  je     L18
  add    $0x1,%rdi
  mov    $0x0,%edx
L19:
  lea    (%rdx,%rdx,4),%edx
  movsbl %al,%eax
  lea    -0x30(%rax,%rdx,2),%edx
  add    $0x1,%rdi
  movzbl -0x1(%rdi),%eax
  test   %al,%al
  jne    L19
L24:
  mov    %edx,%eax
  ret
L18:
  mov    $0x0,%edx
  jmp    L24
```

assistant: ```c
int string_to_int(char *string) {
  int i, n;
  n = 0;
  for (i = 0; string[i] != '\0'; i++)
    n = (n * 10) + (string[i] - '0');
  return n;
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<string_to_int>:
  endbr64
  movsbl (%rdi),%eax
  test   %al,%al
  je     L2
  add    $0x1,%rdi
  xor    %r8d,%r8d
  nopw   0x0(%rax,%rax,1)
L18:
  lea    (%r8,%r8,4),%edx
  add    $0x1,%rdi
  lea    -0x30(%rax,%rdx,2),%r8d
  movsbl -0x1(%rdi),%eax
  test   %al,%al
  jne    L18
  mov    %r8d,%eax
  ret
  nopl   0x0(%rax)
L2:
  xor    %r8d,%r8d
  mov    %r8d,%eax
  ret
```

assistant: ```c
int string_to_int(char *string) {
  int i, n;
  n = 0;
  for (i = 0; string[i] != '\0'; i++)
    n = (n * 10) + (string[i] - '0');
  return n;
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<string_to_int>:
  endbr64
  movsbl (%rdi),%eax
  test   %al,%al
  je     L16
  add    $0x1,%rdi
  xor    %r8d,%r8d
  nopw   0x0(%rax,%rax,1)
L9:
  lea    (%r8,%r8,4),%edx
  add    $0x1,%rdi
  lea    -0x30(%rax,%rdx,2),%r8d
  movsbl -0x1(%rdi),%eax
  test   %al,%al
  jne    L9
  mov    %r8d,%eax
  ret
  nopl   0x0(%rax)
L16:
  xor    %r8d,%r8d
  mov    %r8d,%eax
  ret
```

assistant: ```c
int string_to_int(char *string) {
  int i, n;
  n = 0;
  for (i = 0; string[i] != '\0'; i++)
    n = (n * 10) + (string[i] - '0');
  return n;
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<set_usvector>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    %rdx,-0x28(%rbp)
  mov    %ecx,-0x2c(%rbp)
  mov    -0x20(%rbp),%rax
  mov    %eax,-0x4(%rbp)
  jmp    L5
L15:
  mov    -0x4(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rax,%rdx
  mov    -0x2c(%rbp),%eax
  mov    %eax,(%rdx)
  addl   $0x1,-0x4(%rbp)
L5:
  mov    -0x4(%rbp),%eax
  cltq
  cmp    %rax,-0x28(%rbp)
  jge    L15
  nop
  nop
  pop    %rbp
  ret
```

assistant: ```c
void set_usvector(ushort *v, long nl, long nh, ushort cte) {
  int i;
  for (i = nl; i <= nh; i++)
    v[i] = cte;
}
```
user: Translate the below assembly code into C programming language:

```asm
<set_usvector>:
  endbr64
  movslq %esi,%rax
  cmp    %rax,%rdx
  jl     L7
  lea    (%rdi,%rax,4),%rax
  lea    0x4(%rdi,%rdx,4),%rdx
L4:
  mov    %ecx,(%rax)
  add    $0x4,%rax
  cmp    %rdx,%rax
  jne    L4
L7:
  ret
```

assistant: ```c
void set_usvector(ushort *v, long nl, long nh, ushort cte) {
  int i;
  for (i = nl; i <= nh; i++)
    v[i] = cte;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<set_usvector>:
  endbr64
  movslq %esi,%rsi
  cmp    %rsi,%rdx
  jl     L12
  lea    (%rdi,%rsi,4),%rax
  lea    0x4(%rdi,%rdx,4),%rdx
  nopl   (%rax)
L16:
  mov    %ecx,(%rax)
  add    $0x4,%rax
  cmp    %rdx,%rax
  jne    L16
L12:
  ret
```

assistant: ```c
void set_usvector(ushort *v, long nl, long nh, ushort cte) {
  int i;
  for (i = nl; i <= nh; i++)
    v[i] = cte;
}
```
user: 下面的汇编指令对应的C源代码是什么:

```asm
<set_usvector>:
  endbr64
  mov    %rdi,%r8
  mov    %rsi,%rdi
  mov    %rdx,%rsi
  movslq %edi,%rdx
  mov    %edi,%eax
  cmp    %rdx,%rsi
  jl     L55
  mov    %rsi,%r10
  sub    %rdx,%r10
  lea    0x1(%r10),%r9
  cmp    $0x2,%r10
  jbe    L15
  lea    (%r8,%rdx,4),%rax
  mov    %r9,%rdx
  movd   %ecx,%xmm1
  shr    $0x2,%rdx
  pshufd $0x0,%xmm1,%xmm0
  shl    $0x4,%rdx
  add    %rax,%rdx
  nopw   0x0(%rax,%rax,1)
L30:
  movups %xmm0,(%rax)
  add    $0x10,%rax
  cmp    %rax,%rdx
  jne    L30
  mov    %r9,%rdx
  and    $0xfffffffffffffffc,%rdx
  lea    (%rdi,%rdx,1),%eax
  cmp    %rdx,%r9
  je     L55
L15:
  movslq %eax,%rdx
  mov    %ecx,(%r8,%rdx,4)
  lea    0x0(,%rdx,4),%rdi
  lea    0x1(%rax),%edx
  movslq %edx,%rdx
  cmp    %rdx,%rsi
  jl     L55
  add    $0x2,%eax
  mov    %ecx,0x4(%r8,%rdi,1)
  cltq
  cmp    %rax,%rsi
  jl     L55
  mov    %ecx,0x8(%r8,%rdi,1)
L55:
  ret
```

assistant: ```c
void set_usvector(ushort *v, long nl, long nh, ushort cte) {
  int i;
  for (i = nl; i <= nh; i++)
    v[i] = cte;
}
```
user: 这段汇编代码用C语言表示是什么样的？

```asm
<SbCJ22537442193159_br_find_etc_dir>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    $0x0,%edi
  call   <SbCJ22537442193159_br_find_prefix@plt>
  mov    %rax,-0x10(%rbp)
  cmpq   $0x0,-0x10(%rbp)
  jne    L10
  cmpq   $0x0,-0x18(%rbp)
  je     L17
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <strdup@plt>
  jmp    L21
L17:
  mov    $0x0,%eax
  jmp    L21
L10:
  mov    -0x10(%rbp),%rax
  lea    D0(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <SbCJ22537442193159_br_build_path@plt>
  mov    %rax,-0x8(%rbp)
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x8(%rbp),%rax
L21:
  leave
  ret
```

tool_calls: name: retrieve_data
arguments: tag: D0
datatype: string

tool: D0: etc

assistant: ```c
char *SbCJ22537442193159_br_find_etc_dir(const char *default_etc_dir) {
  char *prefix, *dir;
  prefix = SbCJ22537442193159_br_find_prefix((const char *)((void *)0));
  if (prefix == (char *)((void *)0)) {
    if (default_etc_dir != (const char *)((void *)0))
      return strdup(default_etc_dir);
    else
      return (char *)((void *)0);
  }
  dir = SbCJ22537442193159_br_build_path(prefix, "etc");
  free(prefix);
  return dir;
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<SbCJ22537442193159_br_find_etc_dir>:
  endbr64
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdi,%rbp
  mov    $0x0,%edi
  call   <SbCJ22537442193159_br_find_prefix@plt>
  test   %rax,%rax
  je     L1
  mov    %rax,%rbx
  lea    D4(%rip),%rsi
  mov    %rax,%rdi
  call   <SbCJ22537442193159_br_build_path@plt>
  mov    %rax,%r12
  mov    %rbx,%rdi
  call   <free@plt>
L13:
  mov    %r12,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
L1:
  mov    %rbp,%r12
  test   %rbp,%rbp
  je     L13
  mov    %rbp,%rdi
  call   <strdup@plt>
  mov    %rax,%r12
  jmp    L13
```

tool_calls: name: retrieve_data
arguments: data_label: D4
datatype: string

tool: D4: etc

assistant: ```c
char *SbCJ22537442193159_br_find_etc_dir(const char *default_etc_dir) {
  char *prefix, *dir;
  prefix = SbCJ22537442193159_br_find_prefix((const char *)((void *)0));
  if (prefix == (char *)((void *)0)) {
    if (default_etc_dir != (const char *)((void *)0))
      return strdup(default_etc_dir);
    else
      return (char *)((void *)0);
  }
  dir = SbCJ22537442193159_br_build_path(prefix, "etc");
  free(prefix);
  return dir;
}
```
user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<SbCJ22537442193159_br_find_etc_dir>:
  endbr64
  push   %r12
  mov    %rdi,%r12
  xor    %edi,%edi
  push   %rbp
  sub    $0x8,%rsp
  call   <SbCJ22537442193159_br_find_prefix@plt>
  test   %rax,%rax
  je     L10
  mov    %rax,%rbp
  lea    D1(%rip),%rsi
  mov    %rax,%rdi
  call   <SbCJ22537442193159_br_build_path@plt>
  mov    %rbp,%rdi
  mov    %rax,%r12
  call   <free@plt>
  add    $0x8,%rsp
  mov    %r12,%rax
  pop    %rbp
  pop    %r12
  ret
  nopw   0x0(%rax,%rax,1)
L10:
  test   %r12,%r12
  je     L19
  add    $0x8,%rsp
  mov    %r12,%rdi
  pop    %rbp
  pop    %r12
  jmp    10b0 <strdup@plt>
  nopl   0x0(%rax)
L19:
  xor    %r12d,%r12d
  add    $0x8,%rsp
  mov    %r12,%rax
  pop    %rbp
  pop    %r12
  ret
```

tool_calls: name: retrieve_data
arguments: data_label: D1
type: string

tool: D1: etc

assistant: ```c
char *SbCJ22537442193159_br_find_etc_dir(const char *default_etc_dir) {
  char *prefix, *dir;
  prefix = SbCJ22537442193159_br_find_prefix((const char *)((void *)0));
  if (prefix == (char *)((void *)0)) {
    if (default_etc_dir != (const char *)((void *)0))
      return strdup(default_etc_dir);
    else
      return (char *)((void *)0);
  }
  dir = SbCJ22537442193159_br_build_path(prefix, "etc");
  free(prefix);
  return dir;
}
```
user: 这段汇编代码用C语言表示是什么样的:

```asm
<SbCJ22537442193159_br_find_etc_dir>:
  endbr64
  push   %r12
  mov    %rdi,%r12
  xor    %edi,%edi
  push   %rbp
  sub    $0x8,%rsp
  call   <SbCJ22537442193159_br_find_prefix@plt>
  test   %rax,%rax
  je     L17
  mov    %rax,%rbp
  lea    D3(%rip),%rsi
  mov    %rax,%rdi
  call   <SbCJ22537442193159_br_build_path@plt>
  mov    %rbp,%rdi
  mov    %rax,%r12
  call   <free@plt>
  add    $0x8,%rsp
  mov    %r12,%rax
  pop    %rbp
  pop    %r12
  ret
  nopw   0x0(%rax,%rax,1)
L17:
  test   %r12,%r12
  je     L15
  add    $0x8,%rsp
  mov    %r12,%rdi
  pop    %rbp
  pop    %r12
  jmp    10b0 <strdup@plt>
  nopl   0x0(%rax)
L15:
  xor    %r12d,%r12d
  add    $0x8,%rsp
  mov    %r12,%rax
  pop    %rbp
  pop    %r12
  ret
```

tool_calls: name: extract_symbolic_data
arguments: data_tag: D3
type: string

tool: D3: etc

assistant: ```c
char *SbCJ22537442193159_br_find_etc_dir(const char *default_etc_dir) {
  char *prefix, *dir;
  prefix = SbCJ22537442193159_br_find_prefix((const char *)((void *)0));
  if (prefix == (char *)((void *)0)) {
    if (default_etc_dir != (const char *)((void *)0))
      return strdup(default_etc_dir);
    else
      return (char *)((void *)0);
  }
  dir = SbCJ22537442193159_br_build_path(prefix, "etc");
  free(prefix);
  return dir;
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<main>:
  endbr64
  push   %rbx
  sub    $0x20,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  lea    0x10(%rsp),%rcx
  lea    0x15(%rsp),%rbx
  lea    0xc(%rsp),%rsi
  mov    %rbx,%rdx
  lea    D61(%rip),%rdi
  call   <scanf@plt>
  lea    D3(%rip),%rsi
  mov    %rbx,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L72
  mov    0x10(%rsp),%esi
  add    0xc(%rsp),%esi
  lea    D120(%rip),%rdi
  call   <printf@plt>
L24:
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L4
  mov    $0x0,%eax
  add    $0x20,%rsp
  pop    %rbx
  ret
L72:
  lea    0x15(%rsp),%rdi
  lea    D90(%rip),%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L74
  mov    0xc(%rsp),%esi
  sub    0x10(%rsp),%esi
  lea    D120(%rip),%rdi
  call   <printf@plt>
  jmp    L24
L74:
  lea    0x15(%rsp),%rdi
  lea    D87(%rip),%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L25
  cmpl   $0x0,0x10(%rsp)
  je     L115
  lea    0x15(%rsp),%rdi
  lea    D89(%rip),%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L69
  mov    0xc(%rsp),%eax
  cltd
  idivl  0x10(%rsp)
  mov    %eax,%esi
  lea    D120(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  jmp    L24
L25:
  mov    0xc(%rsp),%esi
  imul   0x10(%rsp),%esi
  lea    D120(%rip),%rdi
  call   <printf@plt>
  jmp    L24
L69:
  lea    0x15(%rsp),%rdi
  lea    D52(%rip),%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L15
  mov    0xc(%rsp),%eax
  cltd
  idivl  0x10(%rsp)
  mov    %edx,%esi
  lea    D120(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  jmp    L24
L15:
  lea    D4(%rip),%rdi
  call   <puts@plt>
  jmp    L24
L115:
  lea    D4(%rip),%rdi
  call   <puts@plt>
  jmp    L24
L4:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: data_tag: D61
datatype: string
name: retrieve_data
arguments: data_tag: D3
datatype: string
name: retrieve_data
arguments: data_tag: D120
datatype: string
name: retrieve_data
arguments: data_tag: D90
datatype: string
name: retrieve_data
arguments: data_tag: D87
datatype: string
name: retrieve_data
arguments: data_tag: D89
datatype: string
name: retrieve_data
arguments: data_tag: D52
datatype: string
name: retrieve_data
arguments: data_tag: D4
datatype: string

tool: D61: %d %s %d

tool: D3: add

tool: D120: %d


tool: D90: sub

tool: D87: mul

tool: D89: div

tool: D52: mod

tool: D4: error

assistant: ```c
int main() {
  int a, b, c;
  char ch[3];
  scanf("%d %s %d", &a, ch, &b);
  if (strcmp(ch, "add") == 0) {
    c = a + b;
    printf("%d\n", c);
  } else {
    if (strcmp(ch, "sub") == 0) {
      c = a - b;
      printf("%d\n", c);
    } else {
      if (strcmp(ch, "mul") == 0) {
        c = a * b;
        printf("%d\n", c);
      } else {
        if (b != 0)
          if (strcmp(ch, "div") == 0) {
            c = a / b;
            printf("%d\n", c);
          } else {
            if (strcmp(ch, "mod") == 0) {
              c = a % b;
              printf("%d\n", c);
            } else
              printf("error\n");
          }
        else
          printf("error\n");
      }
    }
  }
  return 0;
}
```
user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  push   %rbp
  lea    D25(%rip),%rdi
  sub    $0x20,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  lea    0x15(%rsp),%rbp
  lea    0xc(%rsp),%rsi
  lea    0x10(%rsp),%rcx
  mov    %rbp,%rdx
  call   <scanf@plt>
  lea    D10(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L52
  mov    0x10(%rsp),%esi
  lea    D106(%rip),%rdi
  add    0xc(%rsp),%esi
  call   <printf@plt>
L44:
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L58
  add    $0x20,%rsp
  xor    %eax,%eax
  pop    %rbp
  ret
L52:
  lea    D28(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L41
  mov    0xc(%rsp),%esi
  lea    D106(%rip),%rdi
  sub    0x10(%rsp),%esi
  call   <printf@plt>
  jmp    L44
L41:
  lea    D52(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L76
  cmpl   $0x0,0x10(%rsp)
  je     L45
  lea    D4(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L77
  lea    D108(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L45
  mov    0xc(%rsp),%eax
  lea    D106(%rip),%rdi
  cltd
  idivl  0x10(%rsp)
  xor    %eax,%eax
  mov    %edx,%esi
  call   <printf@plt>
  jmp    L44
L76:
  mov    0xc(%rsp),%esi
  imul   0x10(%rsp),%esi
  lea    D106(%rip),%rdi
  call   <printf@plt>
  jmp    L44
L45:
  lea    D3(%rip),%rdi
  call   <puts@plt>
  jmp    L44
L77:
  mov    0xc(%rsp),%eax
  lea    D106(%rip),%rdi
  cltd
  idivl  0x10(%rsp)
  mov    %eax,%esi
  xor    %eax,%eax
  call   <printf@plt>
  jmp    L44
L58:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: extract_symbolic_data
arguments: label: D25
data_type: string
name: extract_symbolic_data
arguments: label: D10
data_type: string
name: extract_symbolic_data
arguments: label: D106
data_type: string
name: extract_symbolic_data
arguments: label: D28
data_type: string
name: extract_symbolic_data
arguments: label: D52
data_type: string
name: extract_symbolic_data
arguments: label: D4
data_type: string
name: extract_symbolic_data
arguments: label: D108
data_type: string
name: extract_symbolic_data
arguments: label: D3
data_type: string

tool: D25: %d %s %d

tool: D10: add

tool: D106: %d


tool: D28: sub

tool: D52: mul

tool: D4: div

tool: D108: mod

tool: D3: error

assistant: ```c
int main() {
  int a, b, c;
  char ch[3];
  scanf("%d %s %d", &a, ch, &b);
  if (strcmp(ch, "add") == 0) {
    c = a + b;
    printf("%d\n", c);
  } else {
    if (strcmp(ch, "sub") == 0) {
      c = a - b;
      printf("%d\n", c);
    } else {
      if (strcmp(ch, "mul") == 0) {
        c = a * b;
        printf("%d\n", c);
      } else {
        if (b != 0)
          if (strcmp(ch, "div") == 0) {
            c = a / b;
            printf("%d\n", c);
          } else {
            if (strcmp(ch, "mod") == 0) {
              c = a % b;
              printf("%d\n", c);
            } else
              printf("error\n");
          }
        else
          printf("error\n");
      }
    }
  }
  return 0;
}
```