ylfeng/ReF-Decompile-dataset huggingface dataset:
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<should_fail>:
  endbr64
  movsd  D5(%rip),%xmm0
  jmp    1050 <f@plt>
```

tool_calls: name: extract_symbolic_data
arguments: data_tag: D5
type: f64

tool: D5: 2

assistant: ```c
void should_fail() {
  double x = 2.0;
  f(x);
}
```
user: What is the c source code of the assembly code below:

```asm
<read_string>:
  endbr64
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x10,%rsp
  mov    %rdi,%rbx
  mov    %fs:0x28,%rax
  mov    %rax,0x1008(%rsp)
  xor    %eax,%eax
  test   %rdi,%rdi
  je     L69
  call   <feof@plt>
  mov    $0x0,%ebp
  test   %rax,%rax
  jne    L49
  mov    %rbx,%rdi
  call   <ferror@plt>
  test   %rax,%rax
  jne    L49
  mov    %rsp,%rbp
  mov    $0x1000,%edx
  mov    $0x0,%esi
  mov    %rbp,%rdi
  call   <memset@plt>
  mov    %rbx,%rdx
  mov    $0x1000,%esi
  mov    %rbp,%rdi
  call   <fgets@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L49
  mov    %rsp,%rdi
  call   <strlen@plt>
  lea    D22(%rip),%rbp
  test   %rax,%rax
  je     L49
  movzbl (%rsp),%edx
  cmp    $0xd,%dl
  je     L36
  cmp    $0xa,%dl
  je     L36
  lea    0x2(%rax),%rbx
  mov    %rbx,%rdi
  call   <malloc@plt>
  mov    %rax,%r12
  mov    $0x0,%ebp
  test   %rax,%rax
  je     L49
  mov    %rax,%rbp
  mov    %rbx,%rdx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  movzbl (%rsp),%eax
  test   %al,%al
  je     L148
  lea    0x1(%rsp),%rdx
  mov    $0x0,%ecx
  jmp    L27
L98:
  mov    %al,0x0(%rbp,%rcx,1)
  add    $0x1,%rcx
L136:
  add    $0x1,%rdx
  movzbl -0x1(%rdx),%eax
  test   %al,%al
  je     L148
L27:
  cmp    $0xd,%al
  je     L136
  cmp    $0xa,%al
  jne    L98
  jmp    L136
L148:
  mov    %r12,%rdi
  call   <strlen@plt>
  test   %rax,%rax
  lea    D22(%rip),%rax
  cmove  %rax,%rbp
  jmp    L49
L69:
  mov    %rdi,%rbp
L49:
  mov    0x1008(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L15
  mov    %rbp,%rax
  add    $0x1010,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
L36:
  lea    D22(%rip),%rbp
  jmp    L49
L15:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: disassemble_data
arguments: label: D22
datatype: string

tool: 

assistant: ```c
char *read_string(FILE *fp) {
  size_t slen = 0;
  char buffer[4096];
  char *out_buffer = NULL;
  size_t idx1 = 0;
  size_t idx2 = 0;
  char c = 0;
  if (fp == NULL)
    return NULL;
  if ((feof(fp) != 0) || (ferror(fp) != 0))
    return NULL;
  memset(buffer, 0, 4096);
  if (fgets(buffer, 4096, fp) == NULL)
    return NULL;
  slen = strlen(buffer);
  if ((slen == 0) || (buffer[0] == '\n') || (buffer[0] == '\r'))
    return "";
  out_buffer = (char *)malloc(slen + 2);
  if (out_buffer == NULL)
    return NULL;
  memset(out_buffer, 0, (slen + 2));
  while ((c = buffer[idx1]) != '\0') {
    if ((c != '\r') && (c != '\n')) {
      out_buffer[idx2] = c;
      ++idx2;
    }
    ++idx1;
  }
  slen = strlen(out_buffer);
  if (slen == 0)
    return "";
  return out_buffer;
}
```
user: 请将以下的汇编代码转换成C语言代码:

```asm
<read_string>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x10,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x1008(%rsp)
  xor    %eax,%eax
  test   %rdi,%rdi
  je     L8
  mov    %rdi,%r12
  call   <feof@plt>
  test   %rax,%rax
  jne    L8
  mov    %r12,%rdi
  call   <ferror@plt>
  test   %rax,%rax
  jne    L8
  mov    %rsp,%r13
  xor    %esi,%esi
  mov    $0x1000,%edx
  mov    %r13,%rdi
  call   <memset@plt>
  mov    %r12,%rdx
  mov    $0x1000,%esi
  mov    %r13,%rdi
  call   <fgets@plt>
  test   %rax,%rax
  je     L8
  mov    %r13,%rdi
  call   <strlen@plt>
  test   %rax,%rax
  je     L63
  movzbl (%rsp),%edx
  cmp    $0xa,%dl
  je     L63
  cmp    $0xd,%dl
  je     L63
  lea    0x2(%rax),%r13
  mov    %r13,%rdi
  call   <malloc@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L8
  mov    %r13,%rdx
  xor    %esi,%esi
  mov    %rax,%rdi
  mov    %rax,%r12
  call   <memset@plt>
  movzbl (%rsp),%eax
  test   %al,%al
  je     L16
  lea    0x1(%rsp),%rdx
  xor    %ecx,%ecx
L4:
  cmp    $0xd,%al
  je     L111
  cmp    $0xa,%al
  je     L111
  mov    %al,0x0(%rbp,%rcx,1)
  add    $0x1,%rcx
L111:
  movzbl (%rdx),%eax
  add    $0x1,%rdx
  test   %al,%al
  jne    L4
L16:
  mov    %rbp,%rdi
  call   <strlen@plt>
  test   %rax,%rax
  jne    L43
  nopl   0x0(%rax,%rax,1)
L63:
  lea    D4(%rip),%r12
  jmp    L43
  nopl   0x0(%rax)
L8:
  xor    %r12d,%r12d
L43:
  mov    0x1008(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L55
  add    $0x1010,%rsp
  mov    %r12,%rax
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L55:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: disassemble_data
arguments: data_label: D4
type: string

tool: 

assistant: ```c
char *read_string(FILE *fp) {
  size_t slen = 0;
  char buffer[4096];
  char *out_buffer = NULL;
  size_t idx1 = 0;
  size_t idx2 = 0;
  char c = 0;
  if (fp == NULL)
    return NULL;
  if ((feof(fp) != 0) || (ferror(fp) != 0))
    return NULL;
  memset(buffer, 0, 4096);
  if (fgets(buffer, 4096, fp) == NULL)
    return NULL;
  slen = strlen(buffer);
  if ((slen == 0) || (buffer[0] == '\n') || (buffer[0] == '\r'))
    return "";
  out_buffer = (char *)malloc(slen + 2);
  if (out_buffer == NULL)
    return NULL;
  memset(out_buffer, 0, (slen + 2));
  while ((c = buffer[idx1]) != '\0') {
    if ((c != '\r') && (c != '\n')) {
      out_buffer[idx2] = c;
      ++idx2;
    }
    ++idx1;
  }
  slen = strlen(out_buffer);
  if (slen == 0)
    return "";
  return out_buffer;
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<read_string>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x10,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x1008(%rsp)
  xor    %eax,%eax
  test   %rdi,%rdi
  je     L46
  mov    %rdi,%r12
  call   <feof@plt>
  test   %rax,%rax
  jne    L46
  mov    %r12,%rdi
  call   <ferror@plt>
  test   %rax,%rax
  jne    L46
  mov    %rsp,%r13
  xor    %esi,%esi
  mov    $0x1000,%edx
  mov    %r13,%rdi
  call   <memset@plt>
  mov    %r12,%rdx
  mov    $0x1000,%esi
  mov    %r13,%rdi
  call   <fgets@plt>
  test   %rax,%rax
  je     L46
  mov    %r13,%rdi
  call   <strlen@plt>
  test   %rax,%rax
  je     L151
  movzbl (%rsp),%edx
  cmp    $0xa,%dl
  je     L151
  cmp    $0xd,%dl
  je     L151
  lea    0x2(%rax),%r13
  mov    %r13,%rdi
  call   <malloc@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L46
  mov    %r13,%rdx
  xor    %esi,%esi
  mov    %rax,%rdi
  mov    %rax,%r12
  call   <memset@plt>
  movzbl (%rsp),%eax
  test   %al,%al
  je     L157
  lea    0x1(%rsp),%rdx
  xor    %ecx,%ecx
L38:
  cmp    $0xd,%al
  je     L131
  cmp    $0xa,%al
  je     L131
  add    $0x1,%rdx
  mov    %al,0x0(%rbp,%rcx,1)
  add    $0x1,%rcx
  movzbl -0x1(%rdx),%eax
  test   %al,%al
  jne    L38
L157:
  mov    %rbp,%rdi
  call   <strlen@plt>
  test   %rax,%rax
  jne    L56
  nopl   0x0(%rax)
L151:
  lea    D2(%rip),%r12
  jmp    L56
  nopl   0x0(%rax)
L46:
  xor    %r12d,%r12d
L56:
  mov    0x1008(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L100
  add    $0x1010,%rsp
  mov    %r12,%rax
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  cs nopw 0x0(%rax,%rax,1)
L131:
  movzbl (%rdx),%eax
  add    $0x1,%rdx
  test   %al,%al
  jne    L38
  jmp    L157
L100:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: parse_data
arguments: data_tag: D2
data_type: string

tool: 

assistant: ```c
char *read_string(FILE *fp) {
  size_t slen = 0;
  char buffer[4096];
  char *out_buffer = NULL;
  size_t idx1 = 0;
  size_t idx2 = 0;
  char c = 0;
  if (fp == NULL)
    return NULL;
  if ((feof(fp) != 0) || (ferror(fp) != 0))
    return NULL;
  memset(buffer, 0, 4096);
  if (fgets(buffer, 4096, fp) == NULL)
    return NULL;
  slen = strlen(buffer);
  if ((slen == 0) || (buffer[0] == '\n') || (buffer[0] == '\r'))
    return "";
  out_buffer = (char *)malloc(slen + 2);
  if (out_buffer == NULL)
    return NULL;
  memset(out_buffer, 0, (slen + 2));
  while ((c = buffer[idx1]) != '\0') {
    if ((c != '\r') && (c != '\n')) {
      out_buffer[idx2] = c;
      ++idx2;
    }
    ++idx1;
  }
  slen = strlen(out_buffer);
  if (slen == 0)
    return "";
  return out_buffer;
}
```
user: Translate the below assembly code into C programming language:

```asm
<vis_usage>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  lea    D61(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  lea    D12(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  lea    D16(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  lea    D37(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  lea    D31(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  lea    D44(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  lea    D54(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  nop
  pop    %rbp
  ret
```

tool_calls: name: extract_symbolic_data
arguments: tag: D61
type: string
name: extract_symbolic_data
arguments: tag: D12
type: string
name: extract_symbolic_data
arguments: tag: D16
type: string
name: extract_symbolic_data
arguments: tag: D37
type: string
name: extract_symbolic_data
arguments: tag: D31
type: string
name: extract_symbolic_data
arguments: tag: D44
type: string
name: extract_symbolic_data
arguments: tag: D54
type: string

tool: D61: Usage: vis [options]


tool: D12:   -i, --interface             specify the batman-adv interface configured on the system (default: bat0)


tool: D16:   -s, --server                start up in server mode, which regularly updates vis data from batman-adv


tool: D37:   -f, --format <format>       specify the output format for client mode (either "json" or "dot")


tool: D31:   -v, --version               print the version


tool: D44:   -h, --help                  this help


tool: D54: 


assistant: ```c
void vis_usage(void) {
  printf("Usage: vis [options]\n");
  printf("  -i, --interface             specify the batman-adv interface configured on the system (default: bat0)\n");
  printf("  -s, --server                start up in server mode, which regularly updates vis data from batman-adv\n");
  printf("  -f, --format <format>       specify the output format for client mode (either \"json\" or \"dot\")\n");
  printf("  -v, --version               print the version\n");
  printf("  -h, --help                  this help\n");
  printf("\n");
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<vis_usage>:
  endbr64
  sub    $0x8,%rsp
  lea    D54(%rip),%rdi
  call   <printf@plt>
  lea    D64(%rip),%rdi
  call   <printf@plt>
  lea    D50(%rip),%rdi
  call   <printf@plt>
  lea    D63(%rip),%rdi
  call   <printf@plt>
  lea    D33(%rip),%rdi
  call   <printf@plt>
  lea    D36(%rip),%rdi
  call   <printf@plt>
  lea    D68(%rip),%rdi
  call   <printf@plt>
  add    $0x8,%rsp
  ret
```

tool_calls: name: parse_data
arguments: data_label: D54
type: string
name: parse_data
arguments: data_label: D64
type: string
name: parse_data
arguments: data_label: D50
type: string
name: parse_data
arguments: data_label: D63
type: string
name: parse_data
arguments: data_label: D33
type: string
name: parse_data
arguments: data_label: D36
type: string
name: parse_data
arguments: data_label: D68
type: string

tool: D54: Usage: vis [options]


tool: D64:   -i, --interface             specify the batman-adv interface configured on the system (default: bat0)


tool: D50:   -s, --server                start up in server mode, which regularly updates vis data from batman-adv


tool: D63:   -f, --format <format>       specify the output format for client mode (either "json" or "dot")


tool: D33:   -v, --version               print the version


tool: D36:   -h, --help                  this help


tool: D68: 


assistant: ```c
void vis_usage(void) {
  printf("Usage: vis [options]\n");
  printf("  -i, --interface             specify the batman-adv interface configured on the system (default: bat0)\n");
  printf("  -s, --server                start up in server mode, which regularly updates vis data from batman-adv\n");
  printf("  -f, --format <format>       specify the output format for client mode (either \"json\" or \"dot\")\n");
  printf("  -v, --version               print the version\n");
  printf("  -h, --help                  this help\n");
  printf("\n");
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<vis_usage>:
  endbr64
  sub    $0x8,%rsp
  lea    D30(%rip),%rdi
  call   <printf@plt>
  lea    D43(%rip),%rdi
  call   <printf@plt>
  lea    D64(%rip),%rdi
  call   <printf@plt>
  lea    D32(%rip),%rdi
  call   <printf@plt>
  lea    D3(%rip),%rdi
  call   <printf@plt>
  lea    D33(%rip),%rdi
  call   <printf@plt>
  lea    D14(%rip),%rdi
  add    $0x8,%rsp
  jmp    1050 <printf@plt>
```

tool_calls: name: disassemble_data
arguments: tag: D30
type: string
name: disassemble_data
arguments: tag: D43
type: string
name: disassemble_data
arguments: tag: D64
type: string
name: disassemble_data
arguments: tag: D32
type: string
name: disassemble_data
arguments: tag: D3
type: string
name: disassemble_data
arguments: tag: D33
type: string
name: disassemble_data
arguments: tag: D14
type: string

tool: D30: Usage: vis [options]


tool: D43:   -i, --interface             specify the batman-adv interface configured on the system (default: bat0)


tool: D64:   -s, --server                start up in server mode, which regularly updates vis data from batman-adv


tool: D32:   -f, --format <format>       specify the output format for client mode (either "json" or "dot")


tool: D3:   -v, --version               print the version


tool: D33:   -h, --help                  this help


tool: D14: 


assistant: ```c
void vis_usage(void) {
  printf("Usage: vis [options]\n");
  printf("  -i, --interface             specify the batman-adv interface configured on the system (default: bat0)\n");
  printf("  -s, --server                start up in server mode, which regularly updates vis data from batman-adv\n");
  printf("  -f, --format <format>       specify the output format for client mode (either \"json\" or \"dot\")\n");
  printf("  -v, --version               print the version\n");
  printf("  -h, --help                  this help\n");
  printf("\n");
}
```
user: 请从给定的汇编指令推导出C源代码:

```asm
<vis_usage>:
  endbr64
  sub    $0x8,%rsp
  lea    D47(%rip),%rdi
  call   <printf@plt>
  lea    D35(%rip),%rdi
  call   <printf@plt>
  lea    D28(%rip),%rdi
  call   <printf@plt>
  lea    D49(%rip),%rdi
  call   <printf@plt>
  lea    D43(%rip),%rdi
  call   <printf@plt>
  lea    D65(%rip),%rdi
  call   <printf@plt>
  lea    D69(%rip),%rdi
  add    $0x8,%rsp
  jmp    1050 <printf@plt>
```

tool_calls: name: retrieve_data
arguments: tag: D47
datatype: string
name: retrieve_data
arguments: tag: D35
datatype: string
name: retrieve_data
arguments: tag: D28
datatype: string
name: retrieve_data
arguments: tag: D49
datatype: string
name: retrieve_data
arguments: tag: D43
datatype: string
name: retrieve_data
arguments: tag: D65
datatype: string
name: retrieve_data
arguments: tag: D69
datatype: string

tool: D47: Usage: vis [options]


tool: D35:   -i, --interface             specify the batman-adv interface configured on the system (default: bat0)


tool: D28:   -s, --server                start up in server mode, which regularly updates vis data from batman-adv


tool: D49:   -f, --format <format>       specify the output format for client mode (either "json" or "dot")


tool: D43:   -v, --version               print the version


tool: D65:   -h, --help                  this help


tool: D69: 


assistant: ```c
void vis_usage(void) {
  printf("Usage: vis [options]\n");
  printf("  -i, --interface             specify the batman-adv interface configured on the system (default: bat0)\n");
  printf("  -s, --server                start up in server mode, which regularly updates vis data from batman-adv\n");
  printf("  -f, --format <format>       specify the output format for client mode (either \"json\" or \"dot\")\n");
  printf("  -v, --version               print the version\n");
  printf("  -h, --help                  this help\n");
  printf("\n");
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<substring>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x8(%rbp)
  mov    %rsi,-0x10(%rbp)
  mov    %rdx,-0x18(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  je     L41
  mov    -0x8(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L41
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  cmp    %rax,-0x10(%rbp)
  ja     L41
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    -0x10(%rbp),%rcx
  mov    -0x18(%rbp),%rdx
  add    %rcx,%rdx
  cmp    %rdx,%rax
  jae    L2
L41:
  mov    $0x0,%eax
  jmp    L49
L2:
  mov    -0x8(%rbp),%rdx
  mov    -0x10(%rbp),%rax
  add    %rax,%rdx
  mov    -0x18(%rbp),%rax
  mov    %rax,%rsi
  mov    %rdx,%rdi
  call   <strndup@plt>
L49:
  leave
  ret
```

assistant: ```c
char *substring(const char *str, size_t begin, size_t len) {
  if (str == 0 || strlen(str) == 0 || strlen(str) < begin || strlen(str) < (begin + len))
    return 0;
  return strndup(str + begin, len);
}
```
user: What would the C source look like for the assembly code provided here:

```asm
<substring>:
  endbr64
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdi,%rbx
  test   %rdi,%rdi
  je     L66
  mov    %rsi,%rbp
  mov    %rdx,%r12
  cmpb   $0x0,(%rdi)
  je     L26
  call   <strlen@plt>
  cmp    %rbp,%rax
  jb     L29
  lea    0x0(%rbp,%r12,1),%rcx
  mov    $0x0,%edx
  cmp    %rcx,%rax
  jb     L19
  lea    (%rbx,%rbp,1),%rdi
  mov    %r12,%rsi
  call   <strndup@plt>
  mov    %rax,%rdx
L19:
  mov    %rdx,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
L66:
  mov    %rdi,%rdx
  jmp    L19
L26:
  mov    $0x0,%edx
  jmp    L19
L29:
  mov    $0x0,%edx
  jmp    L19
```

assistant: ```c
char *substring(const char *str, size_t begin, size_t len) {
  if (str == 0 || strlen(str) == 0 || strlen(str) < begin || strlen(str) < (begin + len))
    return 0;
  return strndup(str + begin, len);
}
```
user: 请将以下的汇编代码转换成C语言代码:

```asm
<substring>:
  endbr64
  test   %rdi,%rdi
  je     L21
  push   %r12
  push   %rbp
  push   %rbx
  cmpb   $0x0,(%rdi)
  mov    %rdi,%rbx
  je     L13
  mov    %rsi,%rbp
  mov    %rdx,%r12
  call   <strlen@plt>
  cmp    %rbp,%rax
  jb     L13
  lea    0x0(%rbp,%r12,1),%rdx
  cmp    %rdx,%rax
  jb     L13
  lea    (%rbx,%rbp,1),%rdi
  mov    %r12,%rsi
  pop    %rbx
  pop    %rbp
  pop    %r12
  jmp    1070 <strndup@plt>
  nop
L13:
  pop    %rbx
  xor    %eax,%eax
  pop    %rbp
  pop    %r12
  ret
  nopw   0x0(%rax,%rax,1)
L21:
  xor    %eax,%eax
  ret
```

assistant: ```c
char *substring(const char *str, size_t begin, size_t len) {
  if (str == 0 || strlen(str) == 0 || strlen(str) < begin || strlen(str) < (begin + len))
    return 0;
  return strndup(str + begin, len);
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<substring>:
  endbr64
  test   %rdi,%rdi
  je     L2
  push   %r12
  push   %rbp
  push   %rbx
  cmpb   $0x0,(%rdi)
  mov    %rdi,%rbx
  je     L10
  mov    %rsi,%rbp
  mov    %rdx,%r12
  call   <strlen@plt>
  cmp    %rbp,%rax
  jb     L10
  lea    0x0(%rbp,%r12,1),%rdx
  cmp    %rdx,%rax
  jb     L10
  lea    (%rbx,%rbp,1),%rdi
  mov    %r12,%rsi
  pop    %rbx
  pop    %rbp
  pop    %r12
  jmp    1070 <strndup@plt>
  nop
L10:
  pop    %rbx
  xor    %eax,%eax
  pop    %rbp
  pop    %r12
  ret
  nopw   0x0(%rax,%rax,1)
L2:
  xor    %eax,%eax
  ret
```

assistant: ```c
char *substring(const char *str, size_t begin, size_t len) {
  if (str == 0 || strlen(str) == 0 || strlen(str) < begin || strlen(str) < (begin + len))
    return 0;
  return strndup(str + begin, len);
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<dump_io_event>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rdx,%r13
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  movl   $0x0,0x4(%rsp)
  test   %edi,%edi
  js     L2
  mov    %esi,%ebx
  mov    %rcx,%r12
  mov    $0x20,%edi
  call   <malloc@plt>
  mov    %rax,%rbp
  mov    %r12,%rdx
  mov    %rax,%rsi
  mov    %ebx,%edi
  call   <dump_long_long_unsigned_int_from_mem@plt>
  add    %eax,0x4(%rsp)
  lea    0x8(%rbp),%rsi
  lea    0x8(%rbx),%edi
  mov    %r12,%rdx
  call   <dump_long_long_unsigned_int_from_mem@plt>
  add    %eax,0x4(%rsp)
  lea    0x10(%rbp),%rsi
  lea    0x10(%rbx),%edi
  mov    %r12,%rdx
  call   <dump_long_long_int_from_mem@plt>
  add    %eax,0x4(%rsp)
  lea    0x18(%rbp),%rsi
  lea    0x18(%rbx),%edi
  mov    %r12,%rdx
  call   <dump_long_long_int_from_mem@plt>
  add    %eax,0x4(%rsp)
  lea    0x4(%rsp),%rdx
  mov    $0x4,%esi
  mov    %rbp,%rdi
  call   <copy_params@plt>
  mov    %rax,0x0(%r13)
  mov    $0x4,%esi
  mov    %rbp,%rdi
  call   <free_dumped_params@plt>
  mov    0x4(%rsp),%eax
L10:
  mov    0x8(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L29
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L2:
  mov    $0x0,%edi
  call   <malloc@plt>
  mov    %rax,0x0(%r13)
  mov    0x4(%rsp),%eax
  jmp    L10
L29:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int dump_io_event(int depth, unsigned int addr, char **dumped_params, struct target *target) {
  char **dumped_type_params;
  unsigned int arm_tracing_data = addr;
  unsigned int arm_tracing_obj = addr + 8;
  unsigned int arm_tracing_res = addr + 16;
  unsigned int arm_tracing_res2 = addr + 24;
  int len = 0;
  if (depth < 0) {
    *dumped_params = malloc(0);
    return len;
  }
  dumped_type_params = malloc(4 * (sizeof(char *)));
  if (depth >= 0) {
    len += dump_long_long_unsigned_int_from_mem(arm_tracing_data, &dumped_type_params[0], target);
    len += dump_long_long_unsigned_int_from_mem(arm_tracing_obj, &dumped_type_params[1], target);
    len += dump_long_long_int_from_mem(arm_tracing_res, &dumped_type_params[2], target);
    len += dump_long_long_int_from_mem(arm_tracing_res2, &dumped_type_params[3], target);
  }
  *dumped_params = copy_params(dumped_type_params, 4, &len);
  free_dumped_params(dumped_type_params, 4);
  return len;
}
```