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31 linux 中 用户栈帧 -＞ 内核栈帧_linux栈帧格式

作者：你好赵伟 | 2024-02-28 17:49:22

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linux栈帧格式

前言

比如 我们之前调试的 glibc 相关的库函数 

glibc 相关是属于用户程序, 调用 操作系统的系统调用的时候, 会是 怎么样的一个情况呢? 

系统调用 会有对应的系统栈帧来处理 系统调用的相关函数调用的堆栈支持  

测试用例

我们这里主要是以 printf 中会分配缓冲区调用 malloc 库函数 

malloc 库函数 会调用 brk 系统调用, 我们主要是 大致看一下 这个情况 

  1. #include "stdio.h"
  2.  
  3. int main(int argc, char** argv) {
  4.  
  5. int x = 4;
  6. int y = 3;
  7. int z = x + y;
  8.  
  9. printf(" x + y = %d\n ", z);
  10.  
  11. }

elf 的信息如下 

  1. ELF Header:
  2.   Magic:   7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 
  3.   Class:                             ELF64
  4.   Data:                              2's complement, little endian
  5.   Version:                           1 (current)
  6.   OS/ABI:                            UNIX - System V
  7.   ABI Version:                       0
  8.   Type:                              EXEC (Executable file)
  9.   Machine:                           Advanced Micro Devices X86-64
  10.   Version:                           0x1
  11.   Entry point address:               0x400430
  12.   Start of program headers:          64 (bytes into file)
  13.   Start of section headers:          7480 (bytes into file)
  14.   Flags:                             0x0
  15.   Size of this header:               64 (bytes)
  16.   Size of program headers:           56 (bytes)
  17.   Number of program headers:         9
  18.   Size of section headers:           64 (bytes)
  19.   Number of section headers:         36
  20.   Section header string table index: 33
  21.  
  22. Section Headers:
  23.   [Nr] Name              Type             Address           Offset
  24.        Size              EntSize          Flags  Link  Info  Align
  25.   [ 0]                   NULL             0000000000000000  00000000
  26.        0000000000000000  0000000000000000           0     0     0
  27.   [ 1] .interp           PROGBITS         0000000000400238  00000238
  28.        000000000000001c  0000000000000000   A       0     0     1
  29.   [ 2] .note.ABI-tag     NOTE             0000000000400254  00000254
  30.        0000000000000020  0000000000000000   A       0     0     4
  31.   [ 3] .note.gnu.build-i NOTE             0000000000400274  00000274
  32.        0000000000000024  0000000000000000   A       0     0     4
  33.   [ 4] .gnu.hash         GNU_HASH         0000000000400298  00000298
  34.        000000000000001c  0000000000000000   A       5     0     8
  35.   [ 5] .dynsym           DYNSYM           00000000004002b8  000002b8
  36.        0000000000000060  0000000000000018   A       6     1     8
  37.   [ 6] .dynstr           STRTAB           0000000000400318  00000318
  38.        000000000000003f  0000000000000000   A       0     0     1
  39.   [ 7] .gnu.version      VERSYM           0000000000400358  00000358
  40.        0000000000000008  0000000000000002   A       5     0     2
  41.   [ 8] .gnu.version_r    VERNEED          0000000000400360  00000360
  42.        0000000000000020  0000000000000000   A       6     1     8
  43.   [ 9] .rela.dyn         RELA             0000000000400380  00000380
  44.        0000000000000018  0000000000000018   A       5     0     8
  45.   [10] .rela.plt         RELA             0000000000400398  00000398
  46.        0000000000000030  0000000000000018  AI       5    24     8
  47.   [11] .init             PROGBITS         00000000004003c8  000003c8
  48.        000000000000001a  0000000000000000  AX       0     0     4
  49.   [12] .plt              PROGBITS         00000000004003f0  000003f0
  50.        0000000000000030  0000000000000010  AX       0     0     16
  51.   [13] .plt.got          PROGBITS         0000000000400420  00000420
  52.        0000000000000008  0000000000000000  AX       0     0     8
  53.   [14] .text             PROGBITS         0000000000400430  00000430
  54.        00000000000001b2  0000000000000000  AX       0     0     16
  55.   [15] .fini             PROGBITS         00000000004005e4  000005e4
  56.        0000000000000009  0000000000000000  AX       0     0     4
  57.   [16] .rodata           PROGBITS         00000000004005f0  000005f0
  58.        0000000000000012  0000000000000000   A       0     0     4
  59.   [17] .eh_frame_hdr     PROGBITS         0000000000400604  00000604
  60.        0000000000000034  0000000000000000   A       0     0     4
  61.   [18] .eh_frame         PROGBITS         0000000000400638  00000638
  62.        00000000000000f4  0000000000000000   A       0     0     8
  63.   [19] .init_array       INIT_ARRAY       0000000000600e10  00000e10
  64.        0000000000000008  0000000000000000  WA       0     0     8
  65.   [20] .fini_array       FINI_ARRAY       0000000000600e18  00000e18
  66.        0000000000000008  0000000000000000  WA       0     0     8
  67.   [21] .jcr              PROGBITS         0000000000600e20  00000e20
  68.        0000000000000008  0000000000000000  WA       0     0     8
  69.   [22] .dynamic          DYNAMIC          0000000000600e28  00000e28
  70.        00000000000001d0  0000000000000010  WA       6     0     8
  71.   [23] .got              PROGBITS         0000000000600ff8  00000ff8
  72.        0000000000000008  0000000000000008  WA       0     0     8
  73.   [24] .got.plt          PROGBITS         0000000000601000  00001000
  74.        0000000000000028  0000000000000008  WA       0     0     8
  75.   [25] .data             PROGBITS         0000000000601028  00001028
  76.        0000000000000010  0000000000000000  WA       0     0     8
  77.   [26] .bss              NOBITS           0000000000601038  00001038
  78.        0000000000000008  0000000000000000  WA       0     0     1
  79.   [27] .comment          PROGBITS         0000000000000000  00001038
  80.        0000000000000035  0000000000000001  MS       0     0     1
  81.   [28] .debug_aranges    PROGBITS         0000000000000000  0000106d
  82.        0000000000000030  0000000000000000           0     0     1
  83.   [29] .debug_info       PROGBITS         0000000000000000  0000109d
  84.        00000000000000e2  0000000000000000           0     0     1
  85.   [30] .debug_abbrev     PROGBITS         0000000000000000  0000117f
  86.        000000000000006d  0000000000000000           0     0     1
  87.   [31] .debug_line       PROGBITS         0000000000000000  000011ec
  88.        0000000000000043  0000000000000000           0     0     1
  89.   [32] .debug_str        PROGBITS         0000000000000000  0000122f
  90.        00000000000000e0  0000000000000001  MS       0     0     1
  91.   [33] .shstrtab         STRTAB           0000000000000000  00001bea
  92.        000000000000014c  0000000000000000           0     0     1
  93.   [34] .symtab           SYMTAB           0000000000000000  00001310
  94.        00000000000006c0  0000000000000018          35    52     8
  95.   [35] .strtab           STRTAB           0000000000000000  000019d0
  96.        000000000000021a  0000000000000000           0     0     1
  97. Key to Flags:
  98.   W (write), A (alloc), X (execute), M (merge), S (strings), l (large)
  99.   I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)
  100.   O (extra OS processing required) o (OS specific), p (processor specific)
  101.  
  102. There are no section groups in this file.
  103.  
  104. Program Headers:
  105.   Type           Offset             VirtAddr           PhysAddr
  106.                  FileSiz            MemSiz              Flags  Align
  107.   PHDR           0x0000000000000040 0x0000000000400040 0x0000000000400040
  108.                  0x00000000000001f8 0x00000000000001f8  R E    8
  109.   INTERP         0x0000000000000238 0x0000000000400238 0x0000000000400238
  110.                  0x000000000000001c 0x000000000000001c  R      1
  111.       [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
  112.   LOAD           0x0000000000000000 0x0000000000400000 0x0000000000400000
  113.                  0x000000000000072c 0x000000000000072c  R E    200000
  114.   LOAD           0x0000000000000e10 0x0000000000600e10 0x0000000000600e10
  115.                  0x0000000000000228 0x0000000000000230  RW     200000
  116.   DYNAMIC        0x0000000000000e28 0x0000000000600e28 0x0000000000600e28
  117.                  0x00000000000001d0 0x00000000000001d0  RW     8
  118.   NOTE           0x0000000000000254 0x0000000000400254 0x0000000000400254
  119.                  0x0000000000000044 0x0000000000000044  R      4
  120.   GNU_EH_FRAME   0x0000000000000604 0x0000000000400604 0x0000000000400604
  121.                  0x0000000000000034 0x0000000000000034  R      4
  122.   GNU_STACK      0x0000000000000000 0x0000000000000000 0x0000000000000000
  123.                  0x0000000000000000 0x0000000000000000  RW     10
  124.   GNU_RELRO      0x0000000000000e10 0x0000000000600e10 0x0000000000600e10
  125.                  0x00000000000001f0 0x00000000000001f0  R      1
  126.  
  127.  Section to Segment mapping:
  128.   Segment Sections...
  129.    00     
  130.    01     .interp 
  131.    02     .interp .note.ABI-tag .note.gnu.build-id .gnu.hash .dynsym .dynstr .gnu.version .gnu.version_r .rela.dyn .rela.plt .init .plt .plt.got .text .fini .rodata .eh_frame_hdr .eh_frame 
  132.    03     .init_array .fini_array .jcr .dynamic .got .got.plt .data .bss 
  133.    04     .dynamic 
  134.    05     .note.ABI-tag .note.gnu.build-id 
  135.    06     .eh_frame_hdr 
  136.    07     
  137.    08     .init_array .fini_array .jcr .dynamic .got 
  138.  
  139. Dynamic section at offset 0xe28 contains 24 entries:
  140.   Tag        Type                         Name/Value
  141.  0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]
  142.  0x000000000000000c (INIT)               0x4003c8
  143.  0x000000000000000d (FINI)               0x4005e4
  144.  0x0000000000000019 (INIT_ARRAY)         0x600e10
  145.  0x000000000000001b (INIT_ARRAYSZ)       8 (bytes)
  146.  0x000000000000001a (FINI_ARRAY)         0x600e18
  147.  0x000000000000001c (FINI_ARRAYSZ)       8 (bytes)
  148.  0x000000006ffffef5 (GNU_HASH)           0x400298
  149.  0x0000000000000005 (STRTAB)             0x400318
  150.  0x0000000000000006 (SYMTAB)             0x4002b8
  151.  0x000000000000000a (STRSZ)              63 (bytes)
  152.  0x000000000000000b (SYMENT)             24 (bytes)
  153.  0x0000000000000015 (DEBUG)              0x0
  154.  0x0000000000000003 (PLTGOT)             0x601000
  155.  0x0000000000000002 (PLTRELSZ)           48 (bytes)
  156.  0x0000000000000014 (PLTREL)             RELA
  157.  0x0000000000000017 (JMPREL)             0x400398
  158.  0x0000000000000007 (RELA)               0x400380
  159.  0x0000000000000008 (RELASZ)             24 (bytes)
  160.  0x0000000000000009 (RELAENT)            24 (bytes)
  161.  0x000000006ffffffe (VERNEED)            0x400360
  162.  0x000000006fffffff (VERNEEDNUM)         1
  163.  0x000000006ffffff0 (VERSYM)             0x400358
  164.  0x0000000000000000 (NULL)               0x0
  165.  
  166. Relocation section '.rela.dyn' at offset 0x380 contains 1 entries:
  167.   Offset          Info           Type           Sym. Value    Sym. Name + Addend
  168. 000000600ff8  000300000006 R_X86_64_GLOB_DAT 0000000000000000 __gmon_start__ + 0
  169.  
  170. Relocation section '.rela.plt' at offset 0x398 contains 2 entries:
  171.   Offset          Info           Type           Sym. Value    Sym. Name + Addend
  172. 000000601018  000100000007 R_X86_64_JUMP_SLO 0000000000000000 printf@GLIBC_2.2.5 + 0
  173. 000000601020  000200000007 R_X86_64_JUMP_SLO 0000000000000000 __libc_start_main@GLIBC_2.2.5 + 0
  174.  
  175. The decoding of unwind sections for machine type Advanced Micro Devices X86-64 is not currently supported.
  176.  
  177. Symbol table '.dynsym' contains 4 entries:
  178.    Num:    Value          Size Type    Bind   Vis      Ndx Name
  179.      0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT  UND 
  180.      1: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND printf@GLIBC_2.2.5 (2)
  181.      2: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __libc_start_main@GLIBC_2.2.5 (2)
  182.      3: 0000000000000000     0 NOTYPE  WEAK   DEFAULT  UND __gmon_start__
  183.  
  184. Symbol table '.symtab' contains 72 entries:
  185.    Num:    Value          Size Type    Bind   Vis      Ndx Name
  186.      0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT  UND 
  187.      1: 0000000000400238     0 SECTION LOCAL  DEFAULT    1 
  188.      2: 0000000000400254     0 SECTION LOCAL  DEFAULT    2 
  189.      3: 0000000000400274     0 SECTION LOCAL  DEFAULT    3 
  190.      4: 0000000000400298     0 SECTION LOCAL  DEFAULT    4 
  191.      5: 00000000004002b8     0 SECTION LOCAL  DEFAULT    5 
  192.      6: 0000000000400318     0 SECTION LOCAL  DEFAULT    6 
  193.      7: 0000000000400358     0 SECTION LOCAL  DEFAULT    7 
  194.      8: 0000000000400360     0 SECTION LOCAL  DEFAULT    8 
  195.      9: 0000000000400380     0 SECTION LOCAL  DEFAULT    9 
  196.     10: 0000000000400398     0 SECTION LOCAL  DEFAULT   10 
  197.     11: 00000000004003c8     0 SECTION LOCAL  DEFAULT   11 
  198.     12: 00000000004003f0     0 SECTION LOCAL  DEFAULT   12 
  199.     13: 0000000000400420     0 SECTION LOCAL  DEFAULT   13 
  200.     14: 0000000000400430     0 SECTION LOCAL  DEFAULT   14 
  201.     15: 00000000004005e4     0 SECTION LOCAL  DEFAULT   15 
  202.     16: 00000000004005f0     0 SECTION LOCAL  DEFAULT   16 
  203.     17: 0000000000400604     0 SECTION LOCAL  DEFAULT   17 
  204.     18: 0000000000400638     0 SECTION LOCAL  DEFAULT   18 
  205.     19: 0000000000600e10     0 SECTION LOCAL  DEFAULT   19 
  206.     20: 0000000000600e18     0 SECTION LOCAL  DEFAULT   20 
  207.     21: 0000000000600e20     0 SECTION LOCAL  DEFAULT   21 
  208.     22: 0000000000600e28     0 SECTION LOCAL  DEFAULT   22 
  209.     23: 0000000000600ff8     0 SECTION LOCAL  DEFAULT   23 
  210.     24: 0000000000601000     0 SECTION LOCAL  DEFAULT   24 
  211.     25: 0000000000601028     0 SECTION LOCAL  DEFAULT   25 
  212.     26: 0000000000601038     0 SECTION LOCAL  DEFAULT   26 
  213.     27: 0000000000000000     0 SECTION LOCAL  DEFAULT   27 
  214.     28: 0000000000000000     0 SECTION LOCAL  DEFAULT   28 
  215.     29: 0000000000000000     0 SECTION LOCAL  DEFAULT   29 
  216.     30: 0000000000000000     0 SECTION LOCAL  DEFAULT   30 
  217.     31: 0000000000000000     0 SECTION LOCAL  DEFAULT   31 
  218.     32: 0000000000000000     0 SECTION LOCAL  DEFAULT   32 
  219.     33: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS crtstuff.c
  220.     34: 0000000000600e20     0 OBJECT  LOCAL  DEFAULT   21 __JCR_LIST__
  221.     35: 0000000000400460     0 FUNC    LOCAL  DEFAULT   14 deregister_tm_clones
  222.     36: 00000000004004a0     0 FUNC    LOCAL  DEFAULT   14 register_tm_clones
  223.     37: 00000000004004e0     0 FUNC    LOCAL  DEFAULT   14 __do_global_dtors_aux
  224.     38: 0000000000601038     1 OBJECT  LOCAL  DEFAULT   26 completed.7594
  225.     39: 0000000000600e18     0 OBJECT  LOCAL  DEFAULT   20 __do_global_dtors_aux_fin
  226.     40: 0000000000400500     0 FUNC    LOCAL  DEFAULT   14 frame_dummy
  227.     41: 0000000000600e10     0 OBJECT  LOCAL  DEFAULT   19 __frame_dummy_init_array_
  228.     42: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS Test01Sum.c
  229.     43: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS crtstuff.c
  230.     44: 0000000000400728     0 OBJECT  LOCAL  DEFAULT   18 __FRAME_END__
  231.     45: 0000000000600e20     0 OBJECT  LOCAL  DEFAULT   21 __JCR_END__
  232.     46: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS 
  233.     47: 0000000000600e18     0 NOTYPE  LOCAL  DEFAULT   19 __init_array_end
  234.     48: 0000000000600e28     0 OBJECT  LOCAL  DEFAULT   22 _DYNAMIC
  235.     49: 0000000000600e10     0 NOTYPE  LOCAL  DEFAULT   19 __init_array_start
  236.     50: 0000000000400604     0 NOTYPE  LOCAL  DEFAULT   17 __GNU_EH_FRAME_HDR
  237.     51: 0000000000601000     0 OBJECT  LOCAL  DEFAULT   24 _GLOBAL_OFFSET_TABLE_
  238.     52: 00000000004005e0     2 FUNC    GLOBAL DEFAULT   14 __libc_csu_fini
  239.     53: 0000000000000000     0 NOTYPE  WEAK   DEFAULT  UND _ITM_deregisterTMCloneTab
  240.     54: 0000000000601028     0 NOTYPE  WEAK   DEFAULT   25 data_start
  241.     55: 0000000000601038     0 NOTYPE  GLOBAL DEFAULT   25 _edata
  242.     56: 00000000004005e4     0 FUNC    GLOBAL DEFAULT   15 _fini
  243.     57: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND printf@@GLIBC_2.2.5
  244.     58: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __libc_start_main@@GLIBC_
  245.     59: 0000000000601028     0 NOTYPE  GLOBAL DEFAULT   25 __data_start
  246.     60: 0000000000000000     0 NOTYPE  WEAK   DEFAULT  UND __gmon_start__
  247.     61: 0000000000601030     0 OBJECT  GLOBAL HIDDEN    25 __dso_handle
  248.     62: 00000000004005f0     4 OBJECT  GLOBAL DEFAULT   16 _IO_stdin_used
  249.     63: 0000000000400570   101 FUNC    GLOBAL DEFAULT   14 __libc_csu_init
  250.     64: 0000000000601040     0 NOTYPE  GLOBAL DEFAULT   26 _end
  251.     65: 0000000000400430    42 FUNC    GLOBAL DEFAULT   14 _start
  252.     66: 0000000000601038     0 NOTYPE  GLOBAL DEFAULT   26 __bss_start
  253.     67: 0000000000400526    67 FUNC    GLOBAL DEFAULT   14 main
  254.     68: 0000000000000000     0 NOTYPE  WEAK   DEFAULT  UND _Jv_RegisterClasses
  255.     69: 0000000000601038     0 OBJECT  GLOBAL HIDDEN    25 __TMC_END__
  256.     70: 0000000000000000     0 NOTYPE  WEAK   DEFAULT  UND _ITM_registerTMCloneTable
  257.     71: 00000000004003c8     0 FUNC    GLOBAL DEFAULT   11 _init
  258.  
  259. Version symbols section '.gnu.version' contains 4 entries:
  260.  Addr: 0000000000400358  Offset: 0x000358  Link: 5 (.dynsym)
  261.   000:   0 (*local*)       2 (GLIBC_2.2.5)   2 (GLIBC_2.2.5)   0 (*local*)    
  262.  
  263. Version needs section '.gnu.version_r' contains 1 entries:
  264.  Addr: 0x0000000000400360  Offset: 0x000360  Link: 6 (.dynstr)
  265.   000000: Version: 1  File: libc.so.6  Cnt: 1
  266.   0x0010:   Name: GLIBC_2.2.5  Flags: none  Version: 2
  267.  
  268. Displaying notes found at file offset 0x00000254 with length 0x00000020:
  269.   Owner                 Data size	Description
  270.   GNU                  0x00000010	NT_GNU_ABI_TAG (ABI version tag)
  271.     OS: Linux, ABI: 2.6.32
  272.  
  273. Displaying notes found at file offset 0x00000274 with length 0x00000024:
  274.   Owner                 Data size	Description
  275.   GNU                  0x00000014	NT_GNU_BUILD_ID (unique build ID bitstring)

我们这里主要是以 如下流程 来看一下 这个过程 

我们这里 核心关注 内核栈帧相关  

系统调用堆栈信息如下 

内核栈帧 高地址有一个值为 0x00007ffeb8fe14a8 

这个对应的就是 用户栈帧 中的相关需要保存的寄存器, 存储在了 内核栈帧 

以下 内核栈帧数据分析来自于函数 entry_SYSCALL_64, SYSC_brk, do_brk 

然后 系统调用完成之后, 根据 存储的 用户栈帧 信息, 恢复用户栈帧 相关寄存器信息 

另外可以看到的一个问题就是 clion 中对于函数调用栈的分析描述, 上面实际上是有问题的, caller 应该是 glibc 中的 brk.c 中的 brk 系统调用的地方, 不是这里的 0x4005fd, 这个 0x4005fd 仅仅是 entry_SYSCALL_64 中的一个局部变量 

  1. -- main
  2. (gdb) info registers
  3. rax            0x0                 0
  4. rbx            0x615000            6377472
  5. rcx            0xffff88007f5b4f80  -131939258642560
  6. rdx            0xffff88007f5b4f80  -131939258642560
  7. rsi            0x22000             139264
  8. rdi            0x615000            6377472
  9. rbp            0x22000             0x22000
  10. rsp            0xffffc900005dbf60  0xffffc900005dbf60
  11. rip            0x4005fd            0x4005fd
  12.  
  13.  
  14. -- SYSCALL, push 0x00000000004005fd
  15. (gdb) info registers
  16. rax            0x0                 0
  17. rbx            0x615000            6377472
  18. rcx            0xffff88007f5b4f80  -131939258642560
  19. rdx            0xffff88007f5b4f80  -131939258642560
  20. rsi            0x22000             139264
  21. rdi            0x615000            6377472
  22. rbp            0x22000             0x22000
  23. rsp            0xffffc900005dbf58  0xffffc900005dbf58
  24. rip            0xffffffff8185c7bb  0xffffffff8185c7bb <entry_SYSCALL_64+107>
  25.  
  26.  
  27. - SYS_brk
  28. (gdb) info registers
  29. rax            0x0                 0
  30. rbx            0x637000            6516736
  31. rcx            0xffff88007f5b4f80  -131939258642560
  32. rdx            0xffff88007f5b4f80  -131939258642560
  33. rsi            0x22000             139264
  34. rdi            0x615000            6377472
  35. rbp            0xffffc900005dbf48  0xffffc900005dbf48
  36. rsp            0xffffc900005dbf18  0xffffc900005dbf18
  37. rip            0xffffffff811dd3b0  0xffffffff811dd3b0 <SyS_brk+351>
  38.  
  39.  
  40.  
  41. -- SYSC_brk
  42. (gdb) info registers
  43. rax            0x0                 0
  44. rbx            0x1a21000           27398144
  45. rcx            0xffff88007f5b4f80  -131939258642560
  46. rdx            0xffff88007f5b4f80  -131939258642560
  47. rsi            0x22000             139264
  48. rdi            0x19ff000           27258880
  49. rbp            0xffffc900005dbf48  0xffffc900005dbf48
  50. rsp            0xffffc900005dbf18  0xffffc900005dbf18
  51. rip            0xffffffff811dd3b0  0xffffffff811dd3b0 <SyS_brk+351>
  52.  
  53.  
  54. -- do_brk
  55. (gdb) info registers
  56. rax            0x0                 0
  57. rbx            0x22000             139264
  58. rcx            0xffff88007f5b4f80  -131939258642560
  59. rdx            0xffff88007f5b4f80  -131939258642560
  60. rsi            0x22000             139264
  61. rdi            0x19ff000           27258880
  62. rbp            0xffffc900005dbf08  0xffffc900005dbf08
  63. rsp            0xffffc900005dbe88  0xffffc900005dbe88
  64. rip            0xffffffff811dceea  0xffffffff811dceea <do_brk+60>
  65.  
  66.  
  67.  
  68.  
  69. -- 内核栈帧 
  70. (gdb) x /100gx 0xffffc900005dbe88
  71. 0xffffc900005dbe88:	0xffffc900005dbec8	0xffffffff8150aaa9  do_brk_locals
  72. 0xffffc900005dbe98:	0x00000000b8fe1680	0x0000000000000000  do_brk_locals
  73. 0xffffc900005dbea8:	0x00007ffeb8fe15f0	0xffff88007fb0e700  do_brk_locals
  74. 0xffffc900005dbeb8:	0x0000000000000001	0xffffc900005dbee0  do_brk_locals
  75. 0xffffc900005dbec8:	0xffffffff811cc774	0x00000000019ff000  do_brk_locals
  76. 0xffffc900005dbed8:	0x00000000f42e5e76	0x0000000001a21000  do_brk_locals, rbx
  77. 0xffffc900005dbee8:	0xffff88007f7d4800	0xffff88007f7d4868  r12, r13
  78. 0xffffc900005dbef8:	0x0000000001a21000	0x00000000019ff000  r14, r15
  79. 0xffffc900005dbf08:	0xffffc900005dbf48	0xffffffff811dd3b0  rbp, SYSC_brk's returnAddress
  80. 0xffffc900005dbf18:	0x0000000001a22000	0x00000000019ff000  SYSC_brk_locals, rbx
  81. 0xffffc900005dbf28:	0x00007f0d0e0c4f58	0x00007f0d0e0c2b78  r12, r13
  82. 0xffffc900005dbf38:	0x0000000000022000	0x0000000000022000  r14, r15
  83. 0xffffc900005dbf48:	0x0000000000022000	0xffffffff8185c7bb  rbp, entry_SYSCALL_64_locals's returnAddress
  84. 0xffffc900005dbf58:	0x00000000004005fd	0x0000000000000000  entry_SYSCALL_64_locals
  85. 0xffffc900005dbf68:	0x00000000004005f4	0x0000000000000009  entry_SYSCALL_64_locals
  86. 0xffffc900005dbf78:	0x00007f0d0e0c3620	0x00007f0d0e0c3620  entry_SYSCALL_64_locals
  87. 0xffffc900005dbf88:	0x0000000000000246	0x00007f0d0e0c2b78  r11, r10
  88. 0xffffc900005dbf98:	0x000000000000000d	0x00007f0d0ddaa9b0  r9, r8
  89. 0xffffc900005dbfa8:	0xffffffffffffffda	0x00007f0d0ddfaf19  ax, cx
  90. 0xffffc900005dbfb8:	0x00000000019ff000	0x00007f0d0e0c2b20  dx, si
  91. 0xffffc900005dbfc8:	0x0000000001a21000	0x000000000000000c  di, orig_ax
  92. 0xffffc900005dbfd8:	0x00007f0d0ddfaf19	0x0000000000000033  ip, cs
  93. 0xffffc900005dbfe8:	0x0000000000000246	0x00007ffeb8fe14a8  flags, sp
  94. 0xffffc900005dbff8:	0x000000000000002b	Cannot access memory at address 0xffffc900005dc000  ss
  95.  
  96.  
  97.  
  98.  
  99.  
  100. -- 用户栈帧 
  101. (gdb) x /400gx 0x00007ffeb8fe14a8
  102. 0x7ffeb8fe14a8:	0x00007f0d0ddfaff9	0x00007f0d0e0c2b20
  103. 0x7ffeb8fe14b8:	0x0000000000001010	0x0000000000000000
  104. 0x7ffeb8fe14c8:	0x00007f0d0dd85949	0x0000000000000000
  105. 0x7ffeb8fe14d8:	0x00007f0d0dd7f645	0x0000000000000000
  106. 0x7ffeb8fe14e8:	0x0000000000001030	0x0000000000000fff
  107. 0x7ffeb8fe14f8:	0xfffffffffffff000	0x00007f0d0e0c2b78
  108. 0x7ffeb8fe1508:	0x0000000000002000	0x0000000000000000
  109. 0x7ffeb8fe1518:	0x0000000000000000	0x00007ffeb8fe1340
  110. 0x7ffeb8fe1528:	0x00007f0d0dd148af	0x0000000000000000
  111. 0x7ffeb8fe1538:	0x00007f0d0e0d0a9d	0x00000001b8fe16e0
  112. 0x7ffeb8fe1548:	0x00007f0d0e0c2b20	0x0000000000001010
  113. 0x7ffeb8fe1558:	0x0000000000002710	0x00007f0d0e0c2b78
  114. 0x7ffeb8fe1568:	0x00007f0d0e0c2b78	0x00000000004005fd
  115. 0x7ffeb8fe1578:	0x00007f0d0dd80763	0x00007f0d00000063
  116. 0x7ffeb8fe1588:	0x0000000000001000	0x00007ffeb8fe1600
  117. 0x7ffeb8fe1598:	0x00007f0d0de4148b	0x0000000000000000
  118. 0x7ffeb8fe15a8:	0x00007ffeb8fe1608	0xffff80014701ea01
  119. 0x7ffeb8fe15b8:	0x00007ffeb8fe15ff	0x0000000000000040
  120. 0x7ffeb8fe15c8:	0x0000007000000101	0x0000000000000008
  121. 0x7ffeb8fe15d8:	0x0000000000000001	0x0000006f00000063
  122. 0x7ffeb8fe15e8:	0x0000000000000000	0x0000000000000000
  123. 0x7ffeb8fe15f8:	0x0000007c00000077	0x010004157f1c0300
  124. 0x7ffeb8fe1608:	0x00007f0d0e2eb000	0x00007f0d0e2efd60
  125. 0x7ffeb8fe1618:	0x00007f0d0dcfe000	0x0000000000000000
  126. 0x7ffeb8fe1628:	0x00007f0d0e0c2b20	0x0000000000001000
  127. 0x7ffeb8fe1638:	0x0000000000000000	0x00000000004005f4
  128. 0x7ffeb8fe1648:	0x0000000000000000	0x00000000004005fd
  129. 0x7ffeb8fe1658:	0x00007f0d0dd83908	0x0000000db8fe1600
  130. 0x7ffeb8fe1668:	0x0000000000001000	0x00007f0d0e0c3620
  131. 0x7ffeb8fe1678:	0x00007f0d0dd6b1e5	0x0000000000000006
  132. 0x7ffeb8fe1688:	0x0000000000001cef	0x0000000000000001
  133. 0x7ffeb8fe1698:	0x0000000000002180	0x0000000000000000
  134. 0x7ffeb8fe16a8:	0x0000000000000501	0x0000000000000000
  135. 0x7ffeb8fe16b8:	0x0000000000001000	0x0000000000000000
  136. 0x7ffeb8fe16c8:	0x00000000638af0e8	0x0000000011d151ee
  137. 0x7ffeb8fe16d8:	0x00000000638af0e8	0x0000000011d151ee
  138. 0x7ffeb8fe16e8:	0x00000000638af073	0x0000000011d151ee
  139. 0x7ffeb8fe16f8:	0x0000000000000000	0x0000000000000000
  140. 0x7ffeb8fe1708:	0x0000000000000000	0x00007f0d0e0c3620
  141. 0x7ffeb8fe1718:	0x00000000ffffffff	0x0000000000000009
  142. 0x7ffeb8fe1728:	0x00007f0d0dd795a4	0x00007f0d0e0c3620
  143. 0x7ffeb8fe1738:	0x00000000ffffffff	0x0000000000000009
  144. 0x7ffeb8fe1748:	0x00007f0d0dd78908	0x00007f0d0e0c3620
  145. 0x7ffeb8fe1758:	0x0000000000000009	0x0000000000000009
  146. 0x7ffeb8fe1768:	0x00007f0d0dd7729d	0x0000000000196760
  147. 0x7ffeb8fe1778:	0x00007f0d0e0c3620	0x00007ffeb8fe1d20
  148. 0x7ffeb8fe1788:	0x00000000004005f4	0x00007ffeb8fe1d38
  149. 0x7ffeb8fe1798:	0x0000000000000000	0x00000000004005fd
  150. 0x7ffeb8fe17a8:	0x00007f0d0dd4b251	0x0000000000000000
  151. 0x7ffeb8fe17b8:	0x00000000001bfbe8	0x00000000001bfbe8
  152. 0x7ffeb8fe17c8:	0x0000000000200000	0x0000000600000001
  153. 0x7ffeb8fe17d8:	0x00000000001c07c0	0x00000000003c07c0
  154. 0x7ffeb8fe17e8:	0x00000000003c07c0	0x0000000000004f60
  155. 0x7ffeb8fe17f8:	0x00000000000091e0	0x0000000000200000
  156. 0x7ffeb8fe1808:	0x0000000600000002	0x00000000001c3ba0
  157. 0x7ffeb8fe1818:	0x00000000003c3ba0	0x00000000003c3ba0
  158. 0x7ffeb8fe1828:	0x00000000000001e0	0x00000000000001e0
  159. 0x7ffeb8fe1838:	0x0000000000000008	0x0000000400000004
  160. 0x7ffeb8fe1848:	0x0000000000000270	0x0000000000000270
  161. 0x7ffeb8fe1858:	0x0000000000000270	0x0000000000000044
  162. 0x7ffeb8fe1868:	0x0000000000000044	0x0000000000000009
  163. 0x7ffeb8fe1878:	0x0000000000000007	0x00000000001c07c0
  164. 0x7ffeb8fe1888:	0x00000000004005fd	0x00000000003c07c0
  165. 0x7ffeb8fe1898:	0x0000000000000010	0x0000000000000078
  166. 0x7ffeb8fe18a8:	0x0000000000000008	0x000000046474e550
  167. 0x7ffeb8fe18b8:	0x000000000019677c	0x000000000019677c
  168. 0x7ffeb8fe18c8:	0x0000003000000008	0x00007ffeb8fe1e10
  169. 0x7ffeb8fe18d8:	0x00007ffeb8fe1d50	0x00007f0d0dd69490
  170. 0x7ffeb8fe18e8:	0x00007f0d0e0c3620	0x0000000000000000
  171. 0x7ffeb8fe18f8:	0x0000000000000000	0x0000000000000000
  172. 0x7ffeb8fe1908:	0x00007ffeb8fe1cc0	0x00007ffeb8fe1d20
  173. 0x7ffeb8fe1918:	0x00007f0d0e0d1e44	0x00007f0d0e2eb000
  174. 0x7ffeb8fe1928:	0x000000000000025b	0x00007f0d0e2eb000
  175. 0x7ffeb8fe1938:	0x00007f0d0dd01d80	0x00007f0d0dd0eff8
  176. 0x7ffeb8fe1948:	0x00007f0d0e0d267b	0x000000000000025b
  177. 0x7ffeb8fe1958:	0x00007f0d0dd0eff8	0x00007f0d0e2eb000
  178. 0x7ffeb8fe1968:	0x00007ffeb8fe1a08	0x00007ffeb8fe1a04
  179. 0x7ffeb8fe1978:	0x00007f0d0e0d2011	0x00007f0d0e0d5bb0
  180. 0x7ffeb8fe1988:	0x0000000000400323	0x00000000004002d0
  181. 0x7ffeb8fe1998:	0x00007ffeb8fe1a08	0x00000000156b2bb8
  182. 0x7ffeb8fe19a8:	0x000000000055acae	0x00007f0d00000038
  183. 0x7ffeb8fe19b8:	0x00007ffeb8fe1ae0	0x00007f0d0dd0eff8
  184. 0x7ffeb8fe19c8:	0x00007f0d0dd01d80	0x00007ffeb8fe1a04
  185. 0x7ffeb8fe19d8:	0x00007ffeb8fe1ad0	0x00007f0d0e2eb508
  186. 0x7ffeb8fe19e8:	0x00007f0d00000000	0x0000000000000003
  187. 0x7ffeb8fe19f8:	0x00007f0d0e0c8758	0x000000000e0c8450
  188. 0x7ffeb8fe1a08:	0x0000000000000000	0x000000003de00ec7
  189. 0x7ffeb8fe1a18:	0x00007f0d0e2ef4c0	0x00007ffeb8fe1b70
  190. 0x7ffeb8fe1a28:	0x00007f0d0e2eb550	0x0000000000000000
  191. 0x7ffeb8fe1a38:	0x00007f0d0e2ef168	0x00007ffeb8fe1b98
  192. 0x7ffeb8fe1a48:	0x00007f0d0e0d2b4f	0x0000000000000001
  193. 0x7ffeb8fe1a58:	0x00007f0d0e2eb550	0x0000000000000001
  194. 0x7ffeb8fe1a68:	0x0000000000000000	0x0000000000000001
  195. 0x7ffeb8fe1a78:	0x00007f0d0e2ef168	0x00000000004002e8
  196. 0x7ffeb8fe1a88:	0x00007ffeb8fe1af8	0x00000000f63d4e2e
  197. 0x7ffeb8fe1a98:	0x0000000000000000	0x00007f0d0e2ef4c0
  198. 0x7ffeb8fe1aa8:	0x00007ffeb8fe1ae0	0x000000010dd0eff8
  199. 0x7ffeb8fe1ab8:	0x00007ffeb8fe1ad0	0x00000000156b2bb8
  200. 0x7ffeb8fe1ac8:	0x0000000000400323	0x00000000ffffffff
  201. 0x7ffeb8fe1ad8:	0x0000000000000000	0x00007f0d0dd05608
  202. 0x7ffeb8fe1ae8:	0x00007f0d0e2eb000	0x0000000000000000
  203. 0x7ffeb8fe1af8:	0x0000000000000000	0x0000000000600e28
  204. 0x7ffeb8fe1b08:	0x00007f0d0e2ef4c0	0x00007ffeb8fe1c60
  205. 0x7ffeb8fe1b18:	0x00007f0d0e2eb550	0x0000000000000000
  206. 0x7ffeb8fe1b28:	0x00007f0d0e2ef168	0x00007ffeb8fe1c88
  207. 0x7ffeb8fe1b38:	0x00007f0d0e0d2b4f	0x0000000000000001
  208. 0x7ffeb8fe1b48:	0x0000000000601018	0x0000000000400430
  209. 0x7ffeb8fe1b58:	0x00007ffeb8fe1f10	0x0000000000000000
  210. 0x7ffeb8fe1b68:	0x0000000000000000	0x00007ffeb8fe1e30
  211. 0x7ffeb8fe1b78:	0x00007f0d0e0d7b06	0x0000000000000001
  212. 0x7ffeb8fe1b88:	0x0000000000000000	0x00007f0d0e2ef4c0
  213. 0x7ffeb8fe1b98:	0x00007f0d0dd05608	0x00007ffeb8fe1df0
  214. 0x7ffeb8fe1ba8:	0x00007f0d0e0dfe03	0x0000000000000000
  215. 0x7ffeb8fe1bb8:	0x0000000000000000	0x0000000000000002
  216. 0x7ffeb8fe1bc8:	0x0000000000000005	0x00000000004005f4
  217. 0x7ffeb8fe1bd8:	0x00000000004005e0	0x00007f0d0e0d8af0
  218. 0x7ffeb8fe1be8:	0x00007ffeb8fe1c88	0x000000000000037f
  219. 0x7ffeb8fe1bf8:	0x0000000000000000	0x0000000000000000
  220. 0x7ffeb8fe1c08:	0x0000ffff00001f80	0x0000000000000000
  221. 0x7ffeb8fe1c18:	0x00007ffeb8fe0000	0x0000000000000000
  222. 0x7ffeb8fe1c28:	0x0000000001950000	0x0000000000000000
  223. 0x7ffeb8fe1c38:	0x0000000000600000	0x0000000000000000
  224. 0x7ffeb8fe1c48:	0x00007ffeb8fe0000	0x0000000000000000
  225. 0x7ffeb8fe1c58:	0x0000000000000000	0x0000000000000000
  226. 0x7ffeb8fe1c68:	0x00007f0d0e0d0000	0x0000000000000000
  227. 0x7ffeb8fe1c78:	0x0000000000000000	0x0000000000000000
  228. 0x7ffeb8fe1c88:	0x00007f0d0dd00000	0x000000000000ff00
  229. 0x7ffeb8fe1c98:	0x0000000000000000	0x2f2f2f2f2f2f2f2f
  230. 0x7ffeb8fe1ca8:	0x2f2f2f2f2f2f2f2f	0x0000000000000000
  231. 0x7ffeb8fe1cb8:	0x0000000000000000	0x0000000000000000
  232. 0x7ffeb8fe1cc8:	0x00000000ff000000	0x5f5f00656d697474
  233. 0x7ffeb8fe1cd8:	0x7465675f6f736476	0x0000000000000000
  234. 0x7ffeb8fe1ce8:	0x0000000000000000	0x0000000000000000
  235. 0x7ffeb8fe1cf8:	0x0000000000000000	0x0000000000400430
  236. 0x7ffeb8fe1d08:	0x00007ffeb8fe1f10	0x0000000000000000
  237. 0x7ffeb8fe1d18:	0x0000000000000000	0x00007ffeb8fe1e30
  238. 0x7ffeb8fe1d28:	0x00007f0d0dd538a9	0x0000000000000000
  239. 0x7ffeb8fe1d38:	0x0000003000000008	0x00007ffeb8fe1e10
  240. 0x7ffeb8fe1d48:	0x00007ffeb8fe1d50	0x0000000000000000
  241. 0x7ffeb8fe1d58:	0x0000000000000005	0x0000000000000002
  242. 0x7ffeb8fe1d68:	0x0000000000000000	0x00000000004005e0
  243. 0x7ffeb8fe1d78:	0x00007f0d0e0d8af0	0x0000000000000000
  244. 0x7ffeb8fe1d88:	0x0000000000000000	0x2f2f2f2f2f2f2f2f
  245. 0x7ffeb8fe1d98:	0x2f2f2f2f2f2f2f2f	0x0000000000000000
  246. 0x7ffeb8fe1da8:	0x0000000000000000	0x0000000000000000
  247. 0x7ffeb8fe1db8:	0x00000000ff000000	0x5f5f00656d697474
  248. 0x7ffeb8fe1dc8:	0x7465675f6f736476	0x0000000000000000
  249. 0x7ffeb8fe1dd8:	0x0000000000000000	0x0000000000000000
  250. 0x7ffeb8fe1de8:	0x0000000000000000	0x0000000000000000
  251. 0x7ffeb8fe1df8:	0x00007f0d0e2ef168	0x0000000000000000
  252. 0x7ffeb8fe1e08:	0x0000000000400562	0x00007ffeb8fe1f18
  253. 0x7ffeb8fe1e18:	0x0000000100400430	0x00000002b8fe1f10
  254. 0x7ffeb8fe1e28:	0x0000000500000003	0x0000000000400570
  255. 0x7ffeb8fe1e38:	0x00007f0d0dd1e840	0x0000000000000000
  256. 0x7ffeb8fe1e48:	0x00007ffeb8fe1f18	0x0000000100000000
  257. 0x7ffeb8fe1e58:	0x0000000000400526	0x0000000000000000
  258. 0x7ffeb8fe1e68:	0xe3660fab9d01d4e3	0x0000000000400430
  259. 0x7ffeb8fe1e78:	0x00007ffeb8fe1f10	0x0000000000000000
  260. 0x7ffeb8fe1e88:	0x0000000000000000	0x1c9b7ed7ab61d4e3
  261. 0x7ffeb8fe1e98:	0x1d7c14885811d4e3	0x0000000000000000
  262. 0x7ffeb8fe1ea8:	0x0000000000000000	0x0000000000000000
  263. 0x7ffeb8fe1eb8:	0x00007ffeb8fe1f28	0x00007f0d0e2ef168
  264. 0x7ffeb8fe1ec8:	0x00007f0d0e0d880b	0x0000000000000000
  265. 0x7ffeb8fe1ed8:	0x0000000000000000	0x0000000000400430
  266. 0x7ffeb8fe1ee8:	0x00007ffeb8fe1f10	0x0000000000000000
  267. 0x7ffeb8fe1ef8:	0x0000000000400459	0x00007ffeb8fe1f08
  268. 0x7ffeb8fe1f08:	0x000000000000001c	0x0000000000000001
  269. 0x7ffeb8fe1f18:	0x00007ffeb8fe2e07	0x0000000000000000

关于上面内核栈帧 我们需要关注的主要有 orig_ax, 为该系统调用的系统调用号 

比如我们这里 的 brk 系统调用, 系统调用号为 12, 0x000c 

  1. -- 内核栈帧 
  2. (gdb) x /100gx 0xffffc900005dbe88
  3. 0xffffc900005dbe88:	0xffffc900005dbec8	0xffffffff8150aaa9  do_brk_locals
  4. 0xffffc900005dbe98:	0x00000000b8fe1680	0x0000000000000000  do_brk_locals
  5. 0xffffc900005dbea8:	0x00007ffeb8fe15f0	0xffff88007fb0e700  do_brk_locals
  6. 0xffffc900005dbeb8:	0x0000000000000001	0xffffc900005dbee0  do_brk_locals
  7. 0xffffc900005dbec8:	0xffffffff811cc774	0x00000000019ff000  do_brk_locals
  8. 0xffffc900005dbed8:	0x00000000f42e5e76	0x0000000001a21000  do_brk_locals, rbx
  9. 0xffffc900005dbee8:	0xffff88007f7d4800	0xffff88007f7d4868  r12, r13
  10. 0xffffc900005dbef8:	0x0000000001a21000	0x00000000019ff000  r14, r15
  11. 0xffffc900005dbf08:	0xffffc900005dbf48	0xffffffff811dd3b0  rbp, SYSC_brk's returnAddress
  12. 0xffffc900005dbf18:	0x0000000001a22000	0x00000000019ff000  SYSC_brk_locals, rbx
  13. 0xffffc900005dbf28:	0x00007f0d0e0c4f58	0x00007f0d0e0c2b78  r12, r13
  14. 0xffffc900005dbf38:	0x0000000000022000	0x0000000000022000  r14, r15
  15. 0xffffc900005dbf48:	0x0000000000022000	0xffffffff8185c7bb  rbp, entry_SYSCALL_64_locals's returnAddress
  16. 0xffffc900005dbf58:	0x00000000004005fd	0x0000000000000000  entry_SYSCALL_64_locals
  17. 0xffffc900005dbf68:	0x00000000004005f4	0x0000000000000009  entry_SYSCALL_64_locals
  18. 0xffffc900005dbf78:	0x00007f0d0e0c3620	0x00007f0d0e0c3620  entry_SYSCALL_64_locals
  19. 0xffffc900005dbf88:	0x0000000000000246	0x00007f0d0e0c2b78  r11, r10
  20. 0xffffc900005dbf98:	0x000000000000000d	0x00007f0d0ddaa9b0  r9, r8
  21. 0xffffc900005dbfa8:	0xffffffffffffffda	0x00007f0d0ddfaf19  ax, cx
  22. 0xffffc900005dbfb8:	0x00000000019ff000	0x00007f0d0e0c2b20  dx, si
  23. 0xffffc900005dbfc8:	0x0000000001a21000	0x000000000000000c  di, orig_ax
  24. 0xffffc900005dbfd8:	0x00007f0d0ddfaf19	0x0000000000000033  ip, cs
  25. 0xffffc900005dbfe8:	0x0000000000000246	0x00007ffeb8fe14a8  flags, sp
  26. 0xffffc900005dbff8:	0x000000000000002b	Cannot access memory at address 0xffffc900005dc000  ss

假设是 socket 系统调用, 调用号为 41, 0x29 

  1. (gdb) x /100gx 0xffffc90000713f28
  2. 0xffffc90000713f28:	0xffffc90000713f48	0x00000000ed729985
  3. 0xffffc90000713f38:	0x0000000000000000	0x0000000000400790
  4. 0xffffc90000713f48:	0x00007fff66f1dfc0	0xffffffff8185c7bb
  5. 0xffffc90000713f58:	0x00007fff66f1db86	0x00007fff66f1dae0
  6. 0xffffc90000713f68:	0x00007fff66f1dae2	0x00007fff66f1dae8
  7. 0xffffc90000713f78:	0x00000000ffffffff	0x00007fff66f1dae3
  8. 0xffffc90000713f88:	0x0000000000000206	0x000000000000002d
  9. 0xffffc90000713f98:	0x0000000000000000	0x1fffffffffffffff
  10. 0xffffc90000713fa8:	0xffffffffffffffda	0x00007f490b5346a7
  11. 0xffffc90000713fb8:	0x0000000000000000	0x0000000000000001
  12. 0xffffc90000713fc8:	0x0000000000000002	0x0000000000000029  di, orig_ax
  13. 0xffffc90000713fd8:	0x00007f490b5346a7	0x0000000000000033
  14. 0xffffc90000713fe8:	0x0000000000000206	0x00007fff66f1db28
  15. 0xffffc90000713ff8:	0x000000000000002b	Cannot access memory at address 0xffffc90000714000

完

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