user: 请从给定的汇编指令推导出C源代码:

```asm
<get_pci_dev_from_netdev>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %rbx
  sub    $0x568,%rsp
  mov    %rdi,-0x568(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x18(%rbp)
  xor    %eax,%eax
  mov    -0x568(%rbp),%rdx
  lea    -0x540(%rbp),%rax
  mov    %rdx,%rcx
  lea    D15(%rip),%rdx
  lea    D47(%rip),%rsi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <asprintf@plt>
  mov    %eax,-0x54c(%rbp)
  cmpl   $0xffffffff,-0x54c(%rbp)
  jne    L70
  mov    $0x0,%eax
  jmp    L158
L70:
  mov    -0x540(%rbp),%rax
  lea    -0x420(%rbp),%rcx
  mov    $0x3ff,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <readlink@plt>
  mov    %eax,-0x54c(%rbp)
  mov    -0x540(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  cmpl   $0xffffffff,-0x54c(%rbp)
  jne    L22
  mov    -0x568(%rbp),%rax
  mov    $0x2e,%esi
  mov    %rax,%rdi
  call   <strchr@plt>
  mov    %rax,-0x538(%rbp)
  cmpq   $0x0,-0x538(%rbp)
  jne    L127
  mov    $0x0,%eax
  jmp    L158
L127:
  mov    -0x568(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %rax,%rbx
  mov    -0x538(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %rax,%rdx
  mov    %rbx,%rax
  sub    %rdx,%rax
  mov    %rax,-0x530(%rbp)
  cmpq   $0xff,-0x530(%rbp)
  jbe    L76
  mov    $0x0,%eax
  jmp    L158
L76:
  mov    -0x568(%rbp),%rcx
  lea    -0x520(%rbp),%rax
  mov    $0xff,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncpy@plt>
  lea    -0x520(%rbp),%rdx
  mov    -0x530(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L19
  lea    -0x520(%rbp),%rdx
  mov    -0x530(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
L19:
  lea    -0x520(%rbp),%rcx
  mov    -0x568(%rbp),%rdx
  lea    -0x540(%rbp),%rax
  mov    %rcx,%r8
  mov    %rdx,%rcx
  lea    D15(%rip),%rdx
  lea    D24(%rip),%rsi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <asprintf@plt>
  mov    %eax,-0x54c(%rbp)
  cmpl   $0xffffffff,-0x54c(%rbp)
  jne    L147
  mov    $0x0,%eax
  jmp    L158
L147:
  mov    -0x540(%rbp),%rax
  lea    -0x420(%rbp),%rcx
  mov    $0x3ff,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <readlink@plt>
  mov    %eax,-0x54c(%rbp)
  mov    -0x540(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  cmpl   $0xffffffff,-0x54c(%rbp)
  jne    L22
  mov    $0x0,%eax
  jmp    L158
L22:
  lea    -0x420(%rbp),%rax
  mov    $0x2f,%esi
  mov    %rax,%rdi
  call   <strrchr@plt>
  mov    %rax,-0x528(%rbp)
  cmpq   $0x0,-0x528(%rbp)
  je     L200
  mov    -0x528(%rbp),%rax
  lea    0x1(%rax),%rdi
  lea    -0x55c(%rbp),%rsi
  lea    -0x550(%rbp),%rcx
  lea    -0x554(%rbp),%rdx
  lea    -0x558(%rbp),%rax
  mov    %rsi,%r9
  mov    %rcx,%r8
  mov    %rdx,%rcx
  mov    %rax,%rdx
  lea    D45(%rip),%rax
  mov    %rax,%rsi
  call   <sscanf@plt>
  mov    %eax,-0x54c(%rbp)
  cmpl   $0x4,-0x54c(%rbp)
  je     L0
  mov    -0x528(%rbp),%rax
  movb   $0x0,(%rax)
  cmpq   $0x0,-0x528(%rbp)
  je     L203
  lea    -0x420(%rbp),%rax
  cmp    %rax,-0x528(%rbp)
  ja     L22
  jmp    L203
L200:
  nop
  jmp    L203
L0:
  nop
L203:
  mov    -0x55c(%rbp),%edi
  mov    -0x550(%rbp),%esi
  mov    -0x554(%rbp),%ecx
  mov    -0x558(%rbp),%edx
  lea    -0x548(%rbp),%rax
  mov    %edi,%r9d
  mov    %esi,%r8d
  lea    D42(%rip),%rsi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <asprintf@plt>
  mov    %eax,-0x54c(%rbp)
  cmpl   $0xffffffff,-0x54c(%rbp)
  jne    L122
  mov    $0x0,%eax
  jmp    L158
L122:
  mov    -0x548(%rbp),%rax
L158:
  mov    -0x18(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L65
  call   <__stack_chk_fail@plt>
L65:
  mov    -0x8(%rbp),%rbx
  leave
  ret
```

tool_calls: name: extract_symbolic_data
arguments: data_label: D15
data_type: string
name: extract_symbolic_data
arguments: data_label: D47
data_type: string
name: extract_symbolic_data
arguments: data_label: D24
data_type: string
name: extract_symbolic_data
arguments: data_label: D45
data_type: string
name: extract_symbolic_data
arguments: data_label: D42
data_type: string

tool: D15: /sys/class/net

tool: D47: %s/%s/device

tool: D24: %s/%s/lower_%s

tool: D45: %x:%x:%x.%x

tool: D42: %04x:%02x:%02x.%x

assistant: ```c
char *get_pci_dev_from_netdev(const char *netdev) {
  char buf[1024];
  char *pcidev;
  char *path;
  char *cp;
  int func;
  int dom;
  int bus;
  int dev;
  int ret;
  ret = asprintf(&path, "%s/%s/device", "/sys/class/net", netdev);
  if (ret == -1)
    return NULL;
  ret = readlink(path, buf, sizeof(buf) - 1);
  free(path);
  if (ret == -1) {
    char realdev[256];
    char *subif;
    size_t len;
    subif = strchr(netdev, '.');
    if (!subif)
      return NULL;
    len = strlen(netdev) - strlen(subif);
    if (len > (sizeof(realdev) - 1))
      return NULL;
    strncpy(realdev, netdev, sizeof(realdev) - 1);
    if (realdev[len] != '\0')
      realdev[len] = '\0';
    ret = asprintf(&path, "%s/%s/lower_%s", "/sys/class/net", netdev, realdev);
    if (ret == -1)
      return NULL;
    ret = readlink(path, buf, sizeof(buf) - 1);
    free(path);
    if (ret == -1)
      return NULL;
  }
  do {
    cp = strrchr(buf, '/');
    if (!cp)
      break;
    ret = sscanf(cp + 1, "%x:%x:%x.%x", &dom, &bus, &dev, &func);
    if (ret == 4)
      break;
    *cp = '\0';
  } while (cp && cp > buf);
  ret = asprintf(&pcidev, "%04x:%02x:%02x.%x", dom, bus, dev, func);
  if (ret == -1)
    return NULL;
  return pcidev;
}
```