ylfeng/ReF-Decompile-dataset huggingface dataset:
user: Demonstrate the C code that generates the assembly output below:

```asm
<savestr>:
  endbr64
  test   %rdi,%rdi
  je     L9
  push   %rbx
  mov    %rdi,%rbx
  call   <strlen@plt>
  mov    $0x1,%esi
  lea    0x1(%rax),%rdi
  call   <calloc@plt>
  test   %rax,%rax
  je     L18
  xor    %edx,%edx
  nopw   0x0(%rax,%rax,1)
L28:
  movzbl (%rbx,%rdx,1),%ecx
  mov    %cl,(%rax,%rdx,1)
  add    $0x1,%rdx
  test   %cl,%cl
  jne    L28
  pop    %rbx
  ret
L18:
  xor    %eax,%eax
  pop    %rbx
  ret
  nopl   (%rax)
L9:
  xor    %eax,%eax
  ret
```

assistant: ```c
char *savestr(s)
register char *s;
{
  char *p;
  register char *t;
  if (s == 0)
    return (0);
  t = p = (char *)calloc(strlen(s) + 1, 1);
  if (t == 0)
    return (0);
  while ((*t++ = *s++))
    ;
  return (p);
}
```
user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<savestr>:
  endbr64
  test   %rdi,%rdi
  je     L17
  push   %rbx
  mov    %rdi,%rbx
  call   <strlen@plt>
  mov    $0x1,%esi
  lea    0x1(%rax),%rdi
  call   <calloc@plt>
  test   %rax,%rax
  je     L28
  xor    %edx,%edx
  nopw   0x0(%rax,%rax,1)
L10:
  movzbl (%rbx,%rdx,1),%ecx
  mov    %cl,(%rax,%rdx,1)
  add    $0x1,%rdx
  test   %cl,%cl
  jne    L10
  pop    %rbx
  ret
L28:
  xor    %eax,%eax
  pop    %rbx
  ret
  nopl   (%rax)
L17:
  xor    %eax,%eax
  ret
```

assistant: ```c
char *savestr(s)
register char *s;
{
  char *p;
  register char *t;
  if (s == 0)
    return (0);
  t = p = (char *)calloc(strlen(s) + 1, 1);
  if (t == 0)
    return (0);
  while ((*t++ = *s++))
    ;
  return (p);
}
```
user: 这段汇编代码用C语言表示是什么样的？

```asm
<rowReduce>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %esi,-0x2c(%rbp)
  mov    %edx,-0x30(%rbp)
  cmpl   $0x1,-0x2c(%rbp)
  je     L0
  movl   $0x0,-0x14(%rbp)
  jmp    L24
L13:
  mov    -0x14(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    -0x14(%rbp),%edx
  movslq %edx,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x28(%rbp),%rdx
  lea    (%rcx,%rdx,1),%rbx
  mov    -0x2c(%rbp),%edx
  mov    %edx,%esi
  mov    %eax,%edi
  call   <gdiv@plt>
  mov    %eax,(%rbx)
  addl   $0x1,-0x14(%rbp)
L24:
  mov    -0x14(%rbp),%eax
  cmp    -0x30(%rbp),%eax
  jl     L13
L0:
  nop
  mov    -0x8(%rbp),%rbx
  leave
  ret
```

assistant: ```c
void rowReduce(uint8_t *row, uint8_t factor, int size) {
  if (factor != 0x01) {
    int i;
    for (i = 0; i < size; i++) {
      row[i] = gdiv(row[i], factor);
    }
  }
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<rowReduce>:
  endbr64
  cmp    $0x1,%esi
  je     L20
  push   %r12
  push   %rbp
  push   %rbx
  mov    %esi,%ebp
  test   %edx,%edx
  jle    L25
  mov    %rdi,%rbx
  lea    -0x1(%rdx),%eax
  lea    0x4(%rdi,%rax,4),%r12
L23:
  mov    %ebp,%esi
  mov    (%rbx),%edi
  call   <gdiv@plt>
  mov    %eax,(%rbx)
  add    $0x4,%rbx
  cmp    %r12,%rbx
  jne    L23
L25:
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
L20:
  ret
```

assistant: ```c
void rowReduce(uint8_t *row, uint8_t factor, int size) {
  if (factor != 0x01) {
    int i;
    for (i = 0; i < size; i++) {
      row[i] = gdiv(row[i], factor);
    }
  }
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<rowReduce>:
  endbr64
  cmp    $0x1,%esi
  je     L8
  test   %edx,%edx
  jle    L8
  lea    -0x1(%rdx),%eax
  push   %r12
  lea    0x4(%rdi,%rax,4),%r12
  push   %rbp
  mov    %esi,%ebp
  push   %rbx
  mov    %rdi,%rbx
  xchg   %ax,%ax
L23:
  mov    (%rbx),%edi
  mov    %ebp,%esi
  add    $0x4,%rbx
  call   <gdiv@plt>
  mov    %eax,-0x4(%rbx)
  cmp    %r12,%rbx
  jne    L23
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
  nopw   0x0(%rax,%rax,1)
L8:
  ret
```

assistant: ```c
void rowReduce(uint8_t *row, uint8_t factor, int size) {
  if (factor != 0x01) {
    int i;
    for (i = 0; i < size; i++) {
      row[i] = gdiv(row[i], factor);
    }
  }
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<rowReduce>:
  endbr64
  cmp    $0x1,%esi
  je     L3
  test   %edx,%edx
  jle    L3
  lea    -0x1(%rdx),%eax
  push   %r12
  lea    0x4(%rdi,%rax,4),%r12
  push   %rbp
  mov    %esi,%ebp
  push   %rbx
  mov    %rdi,%rbx
  xchg   %ax,%ax
L22:
  mov    (%rbx),%edi
  mov    %ebp,%esi
  add    $0x4,%rbx
  call   <gdiv@plt>
  mov    %eax,-0x4(%rbx)
  cmp    %r12,%rbx
  jne    L22
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
  nopw   0x0(%rax,%rax,1)
L3:
  ret
```

assistant: ```c
void rowReduce(uint8_t *row, uint8_t factor, int size) {
  if (factor != 0x01) {
    int i;
    for (i = 0; i < size; i++) {
      row[i] = gdiv(row[i], factor);
    }
  }
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<getgrouplist>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,0x8(%rsp)
  mov    %rsi,%r15
  mov    %rdx,%r14
  mov    %rcx,0x18(%rsp)
  mov    (%rcx),%r13d
  movl   $0xffffffff,0x14(%rsp)
  test   %r13d,%r13d
  jle    L6
  mov    %rsi,(%r14)
  movl   $0x0,0x14(%rsp)
L6:
  mov    $0x0,%eax
  call   <setgrent@plt>
  mov    $0x1,%r12d
  jmp    L31
L58:
  mov    $0x0,%ebx
L46:
  mov    %r13d,%esi
  mov    %r12d,%edi
  call   <MIN@plt>
  cmp    %ebx,%eax
  jle    L20
  add    $0x1,%rbx
  mov    -0x8(%r14,%rbx,8),%rax
  cmp    %rax,0x0(%rbp)
  jne    L46
  jmp    L31
L20:
  cmp    %r13d,%r12d
  jge    L96
  mov    0x0(%rbp),%rdx
  movslq %r12d,%rax
  mov    %rdx,(%r14,%rax,8)
L123:
  add    $0x1,%r12d
L31:
  mov    $0x0,%eax
  call   <getgrent@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L2
  cmp    %r15,0x0(%rbp)
  je     L31
  mov    0x8(%rbp),%rax
  mov    (%rax),%rdi
  mov    $0x8,%ebx
  test   %rdi,%rdi
  je     L31
L74:
  mov    0x8(%rsp),%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L58
  mov    0x8(%rbp),%rax
  mov    (%rax,%rbx,1),%rdi
  add    $0x8,%rbx
  test   %rdi,%rdi
  jne    L74
  jmp    L31
L96:
  movl   $0xffffffff,0x14(%rsp)
  jmp    L123
L2:
  mov    $0x0,%eax
  call   <endgrent@plt>
  mov    0x18(%rsp),%rax
  mov    %r12d,(%rax)
  mov    0x14(%rsp),%eax
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
int getgrouplist(const char *uname, gid_t agroup, gid_t *groups, int *grpcnt) {
  struct group *grp;
  int maxgroups, i, ngroups, ret;
  maxgroups = *grpcnt;
  ret = 0;
  ngroups = 0;
  if (ngroups < maxgroups)
    groups[ngroups] = agroup;
  else
    ret = -1;
  ngroups++;
  setgrent();
nextgroup:
  while ((grp = getgrent()) != NULL) {
    if (grp->gr_gid == agroup)
      continue;
    for (i = 0; grp->gr_mem[i]; i++) {
      if (strcmp(grp->gr_mem[i], uname) != 0)
        continue;
      for (i = 0; i < MIN(ngroups, maxgroups); i++) {
        if (grp->gr_gid == groups[i])
          goto nextgroup;
      }
      if (ngroups < maxgroups)
        groups[ngroups] = grp->gr_gid;
      else
        ret = -1;
      ngroups++;
      break;
    }
  }
  endgrent();
  *grpcnt = ngroups;
  return ret;
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<getgrouplist>:
  endbr64
  push   %r15
  push   %r14
  mov    %rdi,%r14
  push   %r13
  mov    %rdx,%r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    (%rcx),%r12d
  mov    %rsi,0x8(%rsp)
  mov    %rcx,0x18(%rsp)
  movl   $0xffffffff,0x14(%rsp)
  test   %r12d,%r12d
  jle    L57
  mov    %rsi,(%rdx)
  movl   $0x0,0x14(%rsp)
L57:
  xor    %eax,%eax
  mov    $0x1,%ebp
  call   <setgrent@plt>
  nopl   0x0(%rax)
L23:
  xor    %eax,%eax
  call   <getgrent@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L117
L62:
  mov    0x8(%rsp),%rax
  cmp    %rax,(%rbx)
  je     L23
  mov    0x8(%rbx),%rax
  mov    $0x8,%r15d
  mov    (%rax),%rdi
  test   %rdi,%rdi
  je     L23
  mov    %r14,%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L65
L56:
  mov    0x8(%rbx),%rax
  mov    (%rax,%r15,1),%rdi
  add    $0x8,%r15
  test   %rdi,%rdi
  je     L23
  mov    %r14,%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L56
L65:
  xor    %r15d,%r15d
  jmp    L110
  nop
L78:
  add    $0x1,%r15
  mov    -0x8(%r13,%r15,8),%rax
  cmp    %rax,(%rbx)
  je     L23
L110:
  mov    %r12d,%esi
  mov    %ebp,%edi
  call   <MIN@plt>
  cmp    %r15d,%eax
  jg     L78
  cmp    %r12d,%ebp
  jge    L88
  mov    (%rbx),%rdx
  movslq %ebp,%rax
  mov    %rdx,0x0(%r13,%rax,8)
L82:
  xor    %eax,%eax
  add    $0x1,%ebp
  call   <getgrent@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  jne    L62
L117:
  xor    %eax,%eax
  call   <endgrent@plt>
  mov    0x18(%rsp),%rax
  mov    %ebp,(%rax)
  mov    0x14(%rsp),%eax
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L88:
  movl   $0xffffffff,0x14(%rsp)
  jmp    L82
```

assistant: ```c
int getgrouplist(const char *uname, gid_t agroup, gid_t *groups, int *grpcnt) {
  struct group *grp;
  int maxgroups, i, ngroups, ret;
  maxgroups = *grpcnt;
  ret = 0;
  ngroups = 0;
  if (ngroups < maxgroups)
    groups[ngroups] = agroup;
  else
    ret = -1;
  ngroups++;
  setgrent();
nextgroup:
  while ((grp = getgrent()) != NULL) {
    if (grp->gr_gid == agroup)
      continue;
    for (i = 0; grp->gr_mem[i]; i++) {
      if (strcmp(grp->gr_mem[i], uname) != 0)
        continue;
      for (i = 0; i < MIN(ngroups, maxgroups); i++) {
        if (grp->gr_gid == groups[i])
          goto nextgroup;
      }
      if (ngroups < maxgroups)
        groups[ngroups] = grp->gr_gid;
      else
        ret = -1;
      ngroups++;
      break;
    }
  }
  endgrent();
  *grpcnt = ngroups;
  return ret;
}
```
user: 请从给定的汇编指令推导出C源代码:

```asm
<getgrouplist>:
  endbr64
  push   %r15
  push   %r14
  mov    %rdi,%r14
  push   %r13
  mov    %rdx,%r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    (%rcx),%r12d
  mov    %rsi,0x8(%rsp)
  mov    %rcx,0x18(%rsp)
  movl   $0xffffffff,0x14(%rsp)
  test   %r12d,%r12d
  jle    L50
  mov    %rsi,(%rdx)
  movl   $0x0,0x14(%rsp)
L50:
  xor    %eax,%eax
  mov    $0x1,%ebp
  call   <setgrent@plt>
  nopl   0x0(%rax)
L126:
  xor    %eax,%eax
  call   <getgrent@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L4
L105:
  mov    0x8(%rsp),%rax
  cmp    %rax,(%rbx)
  je     L126
  mov    0x8(%rbx),%rax
  mov    $0x8,%r15d
  mov    (%rax),%rdi
  test   %rdi,%rdi
  je     L126
  mov    %r14,%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L114
L46:
  mov    0x8(%rbx),%rax
  mov    (%rax,%r15,1),%rdi
  add    $0x8,%r15
  test   %rdi,%rdi
  je     L126
  mov    %r14,%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L46
L114:
  xor    %r15d,%r15d
  jmp    L83
  nop
L66:
  add    $0x1,%r15
  mov    -0x8(%r13,%r15,8),%rax
  cmp    %rax,(%rbx)
  je     L126
L83:
  mov    %r12d,%esi
  mov    %ebp,%edi
  call   <MIN@plt>
  cmp    %r15d,%eax
  jg     L66
  cmp    %r12d,%ebp
  jge    L17
  mov    (%rbx),%rdx
  movslq %ebp,%rax
  mov    %rdx,0x0(%r13,%rax,8)
L89:
  xor    %eax,%eax
  add    $0x1,%ebp
  call   <getgrent@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  jne    L105
L4:
  xor    %eax,%eax
  call   <endgrent@plt>
  mov    0x18(%rsp),%rax
  mov    %ebp,(%rax)
  mov    0x14(%rsp),%eax
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L17:
  movl   $0xffffffff,0x14(%rsp)
  jmp    L89
```

assistant: ```c
int getgrouplist(const char *uname, gid_t agroup, gid_t *groups, int *grpcnt) {
  struct group *grp;
  int maxgroups, i, ngroups, ret;
  maxgroups = *grpcnt;
  ret = 0;
  ngroups = 0;
  if (ngroups < maxgroups)
    groups[ngroups] = agroup;
  else
    ret = -1;
  ngroups++;
  setgrent();
nextgroup:
  while ((grp = getgrent()) != NULL) {
    if (grp->gr_gid == agroup)
      continue;
    for (i = 0; grp->gr_mem[i]; i++) {
      if (strcmp(grp->gr_mem[i], uname) != 0)
        continue;
      for (i = 0; i < MIN(ngroups, maxgroups); i++) {
        if (grp->gr_gid == groups[i])
          goto nextgroup;
      }
      if (ngroups < maxgroups)
        groups[ngroups] = grp->gr_gid;
      else
        ret = -1;
      ngroups++;
      break;
    }
  }
  endgrent();
  *grpcnt = ngroups;
  return ret;
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<tracee_read>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %edi,-0x34(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %rdx,-0x48(%rbp)
  mov    %rcx,-0x50(%rbp)
  mov    -0x48(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  and    $0x3,%eax
  mov    %rax,-0x28(%rbp)
  mov    -0x18(%rbp),%rax
  sub    -0x28(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x18(%rbp),%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x10(%rbp)
  jmp    L16
L45:
  mov    -0x20(%rbp),%rdx
  mov    -0x34(%rbp),%eax
  mov    %rdx,%rsi
  mov    %eax,%edi
  call   <tracee_getword@plt>
  mov    %rax,-0x8(%rbp)
  jmp    L25
L48:
  mov    -0x28(%rbp),%rax
  shl    $0x3,%eax
  mov    -0x8(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    %rdx,%rcx
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    %ecx,%edx
  mov    %dl,(%rax)
  addq   $0x1,-0x28(%rbp)
L25:
  cmpq   $0x3,-0x28(%rbp)
  ja     L36
  mov    -0x20(%rbp),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  cmp    %rax,-0x10(%rbp)
  ja     L48
L36:
  movq   $0x0,-0x28(%rbp)
  addq   $0x4,-0x20(%rbp)
L16:
  mov    -0x20(%rbp),%rax
  cmp    -0x10(%rbp),%rax
  jb     L45
  nop
  nop
  leave
  ret
```

assistant: ```c
void tracee_read(pid_t tid, char *dst, const char *src, size_t size) {
  uintptr_t ptr = (uintptr_t)src;
  size_t j = ptr % sizeof(int);
  uintptr_t i = ptr - j;
  uintptr_t end = ptr + size;
  for (; i < end; i += sizeof(int)) {
    unsigned long data = tracee_getword(tid, (const void *)i);
    for (; j < sizeof(int) && i + j < end; ++j)
      *dst++ = data >> (8 * j);
    j = 0;
  }
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<tracee_read>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdx,%r15
  and    $0x3,%r15d
  mov    %rdx,%r12
  and    $0xfffffffffffffffc,%r12
  lea    (%rdx,%rcx,1),%rbx
  cmp    %rbx,%r12
  jae    L14
  mov    %edi,%r13d
  mov    %rsi,%rbp
  mov    $0x0,%r14d
  jmp    L68
L33:
  mov    %rdx,%rbp
L10:
  add    $0x4,%r12
  mov    %r14,%r15
  cmp    %r12,%rbx
  jbe    L14
L68:
  mov    %r12,%rsi
  mov    %r13d,%edi
  call   <tracee_getword@plt>
  lea    (%r15,%r12,1),%rdi
  cmp    %rdi,%rbx
  jbe    L10
  lea    0x0(,%r15,8),%ecx
  mov    %rbp,%rdx
L17:
  add    $0x1,%rdx
  mov    %rax,%rsi
  shr    %cl,%rsi
  mov    %sil,-0x1(%rdx)
  cmp    $0x18,%ecx
  je     L33
  add    $0x8,%ecx
  lea    (%rdx,%rdi,1),%rsi
  sub    %rbp,%rsi
  cmp    %rsi,%rbx
  ja     L17
  mov    %rdx,%rbp
  jmp    L10
L14:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void tracee_read(pid_t tid, char *dst, const char *src, size_t size) {
  uintptr_t ptr = (uintptr_t)src;
  size_t j = ptr % sizeof(int);
  uintptr_t i = ptr - j;
  uintptr_t end = ptr + size;
  for (; i < end; i += sizeof(int)) {
    unsigned long data = tracee_getword(tid, (const void *)i);
    for (; j < sizeof(int) && i + j < end; ++j)
      *dst++ = data >> (8 * j);
    j = 0;
  }
}
```
user: 下面的汇编指令对应的C源代码是什么:

```asm
<tracee_read>:
  endbr64
  push   %r14
  mov    %rdx,%r14
  push   %r13
  mov    %rdx,%r13
  and    $0x3,%r14d
  push   %r12
  and    $0xfffffffffffffffc,%r13
  lea    (%rdx,%rcx,1),%r12
  push   %rbp
  push   %rbx
  cmp    %r12,%r13
  jae    L22
  mov    %edi,%ebp
  mov    %rsi,%rbx
  nopl   0x0(%rax,%rax,1)
L24:
  mov    %ebp,%edi
  mov    %r13,%rsi
  call   <tracee_getword@plt>
  lea    0x0(%r13,%r14,1),%rdi
  lea    0x0(,%r14,8),%ecx
  mov    %rbx,%rdx
  sub    %rbx,%rdi
  nopl   (%rax)
L7:
  lea    (%rdx,%rdi,1),%rsi
  cmp    %rsi,%r12
  jbe    L6
  mov    %rax,%rsi
  add    $0x1,%rdx
  shr    %cl,%rsi
  add    $0x8,%ecx
  mov    %sil,-0x1(%rdx)
  cmp    $0x20,%ecx
  jne    L7
L6:
  add    $0x4,%r13
  mov    %rdx,%rbx
  xor    %r14d,%r14d
  cmp    %r13,%r12
  ja     L24
L22:
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
```

assistant: ```c
void tracee_read(pid_t tid, char *dst, const char *src, size_t size) {
  uintptr_t ptr = (uintptr_t)src;
  size_t j = ptr % sizeof(int);
  uintptr_t i = ptr - j;
  uintptr_t end = ptr + size;
  for (; i < end; i += sizeof(int)) {
    unsigned long data = tracee_getword(tid, (const void *)i);
    for (; j < sizeof(int) && i + j < end; ++j)
      *dst++ = data >> (8 * j);
    j = 0;
  }
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<tracee_read>:
  endbr64
  push   %r14
  lea    (%rdx,%rcx,1),%r14
  push   %r13
  mov    %rdx,%r13
  push   %r12
  and    $0x3,%r13d
  push   %rbp
  mov    %rdx,%rbp
  and    $0xfffffffffffffffc,%rbp
  push   %rbx
  cmp    %r14,%rbp
  jae    L51
  mov    %edi,%r12d
  mov    %rsi,%rbx
  nopl   (%rax)
L92:
  mov    %rbp,%rsi
  mov    %r12d,%edi
  call   <tracee_getword@plt>
  lea    0x0(%rbp,%r13,1),%rdx
  cmp    %r14,%rdx
  jae    L47
  lea    0x0(,%r13,8),%ecx
  mov    %rax,%rdx
  lea    0x1(%rbx),%rsi
  shr    %cl,%rdx
  lea    0x1(%r13),%rcx
  mov    %dl,(%rbx)
  cmp    $0x3,%r13
  je     L46
  lea    0x0(%rbp,%rcx,1),%rdx
  cmp    %rdx,%r14
  jbe    L46
  shl    $0x3,%ecx
  mov    %rax,%rdx
  lea    0x2(%rbx),%rsi
  shr    %cl,%rdx
  mov    %dl,0x1(%rbx)
  lea    0x2(%r13),%rdx
  cmp    $0x2,%r13
  je     L46
  lea    0x0(%rbp,%rdx,1),%rcx
  cmp    %rcx,%r14
  jbe    L46
  lea    0x0(,%rdx,8),%ecx
  mov    %rax,%rdi
  lea    0x3(%rbx),%rsi
  shr    %cl,%rdi
  mov    %dil,0x2(%rbx)
  cmp    $0x2,%rdx
  jne    L46
  lea    0x3(%rbp),%rdx
  cmp    %r14,%rdx
  jae    L46
  shr    $0x18,%rax
  add    $0x4,%rbx
  mov    %al,-0x1(%rbx)
L47:
  add    $0x4,%rbp
  xor    %r13d,%r13d
  cmp    %rbp,%r14
  ja     L92
L51:
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
  nopl   0x0(%rax)
L46:
  mov    %rsi,%rbx
  jmp    L47
```

assistant: ```c
void tracee_read(pid_t tid, char *dst, const char *src, size_t size) {
  uintptr_t ptr = (uintptr_t)src;
  size_t j = ptr % sizeof(int);
  uintptr_t i = ptr - j;
  uintptr_t end = ptr + size;
  for (; i < end; i += sizeof(int)) {
    unsigned long data = tracee_getword(tid, (const void *)i);
    for (; j < sizeof(int) && i + j < end; ++j)
      *dst++ = data >> (8 * j);
    j = 0;
  }
}
```
user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<calc_chr_id2>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %rdi,-0x28(%rbp)
  movq   $0x18,-0x8(%rbp)
  movq   $0x0,-0x18(%rbp)
  mov    -0x8(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  movq   $0x0,-0x10(%rbp)
  jmp    L38
L13:
  mov    -0x10(%rbp),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L34
  mov    -0x10(%rbp),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    -0x20(%rbp),%rdx
  mov    %edx,%ecx
  shl    %cl,%eax
  cltq
  xor    %rax,-0x18(%rbp)
  subq   $0x8,-0x20(%rbp)
  cmpq   $0x0,-0x20(%rbp)
  jns    L29
  mov    -0x8(%rbp),%rax
  mov    %rax,-0x20(%rbp)
L29:
  addq   $0x1,-0x10(%rbp)
L38:
  cmpq   $0x27f,-0x10(%rbp)
  jle    L13
  jmp    L48
L34:
  nop
L48:
  mov    $0x7fffffff,%edi
  call   <randm@plt>
  xor    %rax,-0x18(%rbp)
  andq   $0x7fffffff,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  leave
  ret
```

assistant: ```c
long calc_chr_id2(char *name) {
  const long max_bit = 24;
  long bit;
  long n;
  long i;
  n = 0;
  bit = max_bit;
  for (i = 0; i < (80 * 8); i++) {
    if (name[i] == '\0')
      break;
    n ^= (name[i] << bit);
    bit -= 8;
    if (bit < 0) {
      bit = max_bit;
    }
  }
  n ^= randm(0x7fffffff);
  n &= 0x7fffffff;
  return n;
}
```
user: 下面的汇编指令对应的C源代码是什么:

```asm
<calc_chr_id2>:
  endbr64
  push   %rbx
  lea    0x280(%rdi),%rsi
  mov    $0x0,%ebx
  mov    $0x18,%ecx
  mov    $0x18,%eax
L17:
  movzbl (%rdi),%edx
  test   %dl,%dl
  je     L9
  movsbl %dl,%edx
  shl    %cl,%edx
  movslq %edx,%rdx
  xor    %rdx,%rbx
  sub    $0x8,%rcx
  cmovs  %rax,%rcx
  add    $0x1,%rdi
  cmp    %rsi,%rdi
  jne    L17
L9:
  mov    $0x7fffffff,%edi
  call   <randm@plt>
  xor    %rbx,%rax
  and    $0x7fffffff,%eax
  pop    %rbx
  ret
```

assistant: ```c
long calc_chr_id2(char *name) {
  const long max_bit = 24;
  long bit;
  long n;
  long i;
  n = 0;
  bit = max_bit;
  for (i = 0; i < (80 * 8); i++) {
    if (name[i] == '\0')
      break;
    n ^= (name[i] << bit);
    bit -= 8;
    if (bit < 0) {
      bit = max_bit;
    }
  }
  n ^= randm(0x7fffffff);
  n &= 0x7fffffff;
  return n;
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<calc_chr_id2>:
  endbr64
  push   %rbx
  lea    0x280(%rdi),%rsi
  xor    %ebx,%ebx
  mov    $0x18,%ecx
  mov    $0x18,%eax
  jmp    L29
  nopw   0x0(%rax,%rax,1)
L18:
  shl    %cl,%edx
  movslq %edx,%rdx
  xor    %rdx,%rbx
  sub    $0x8,%rcx
  cmovs  %rax,%rcx
  add    $0x1,%rdi
  cmp    %rdi,%rsi
  je     L8
L29:
  movsbl (%rdi),%edx
  test   %dl,%dl
  jne    L18
L8:
  mov    $0x7fffffff,%edi
  call   <randm@plt>
  xor    %rbx,%rax
  pop    %rbx
  and    $0x7fffffff,%eax
  ret
```

assistant: ```c
long calc_chr_id2(char *name) {
  const long max_bit = 24;
  long bit;
  long n;
  long i;
  n = 0;
  bit = max_bit;
  for (i = 0; i < (80 * 8); i++) {
    if (name[i] == '\0')
      break;
    n ^= (name[i] << bit);
    bit -= 8;
    if (bit < 0) {
      bit = max_bit;
    }
  }
  n ^= randm(0x7fffffff);
  n &= 0x7fffffff;
  return n;
}
```
user: 这段汇编代码用C语言表示是什么样的：

```asm
<calc_chr_id2>:
  endbr64
  push   %rbx
  lea    0x280(%rdi),%rsi
  xor    %ebx,%ebx
  mov    $0x18,%ecx
  mov    $0x18,%eax
  jmp    L9
  nopw   0x0(%rax,%rax,1)
L0:
  shl    %cl,%edx
  movslq %edx,%rdx
  xor    %rdx,%rbx
  sub    $0x8,%rcx
  cmovs  %rax,%rcx
  add    $0x1,%rdi
  cmp    %rsi,%rdi
  je     L26
L9:
  movsbl (%rdi),%edx
  test   %dl,%dl
  jne    L0
L26:
  mov    $0x7fffffff,%edi
  call   <randm@plt>
  xor    %rbx,%rax
  pop    %rbx
  and    $0x7fffffff,%eax
  ret
```

assistant: ```c
long calc_chr_id2(char *name) {
  const long max_bit = 24;
  long bit;
  long n;
  long i;
  n = 0;
  bit = max_bit;
  for (i = 0; i < (80 * 8); i++) {
    if (name[i] == '\0')
      break;
    n ^= (name[i] << bit);
    bit -= 8;
    if (bit < 0) {
      bit = max_bit;
    }
  }
  n ^= randm(0x7fffffff);
  n &= 0x7fffffff;
  return n;
}
```