在NASM中调试符号(更多) [英] Debug symbols in NASM (once more)
问题描述
这个问题在StackOverflow上已经问了好几次了,但是我尝试了所有答案,但仍然无法使NASM包含DWARF调试符号.
This question has been asked several times on StackOverflow but I tried all the answers and I still cannot get NASM to include DWARF debugging symbols.
我正在Ubuntu 18.04 64位下使用NASM 2.13.02.我不确定我是否仍然缺少什么?
I am using NASM 2.13.02 under Ubuntu 18.04 64-bit. I am not sure if I am still missing something?
如果有关系,我实际上想同时使用LLDB和GDB.
In case it matters, I would actually like to use both LLDB and GDB.
谢谢.
这是我的代码:
section .bss
section .text
global _start
_start:
mov ebx, 0
mov eax, 1
int 80h
这是我建立和链接的方式:
Here is how I build and link it:
nasm -g -F dwarf -f elf64 hello.asm
ld -s -o hello hello.o
结果文件为:
$ ls -la hello
-rwxr-xr-x 1 terry terry 352 Sep 4 18:21 hello
$
尝试检查是否包含DWARF数据:
Trying to check if DWARF data is included:
$ dwarfdump hello
No DWARF information present in hello
$
在gdb下运行它:
$ gdb ./hello
GNU gdb (Ubuntu 8.1-0ubuntu3.2) 8.1.0.20180409-git
[... snip copyright ...]
Reading symbols from ./hello...(no debugging symbols found)...done.
(gdb)
推荐答案
我是根据@Michael Petch的建议(这是真正找到根本原因的人)自问自己.
I am self-answering my own question based on a suggestion from @Michael Petch who was the person that actually found the root cause.
问题是我将ld
与-s
一起使用,意思是全部带走",包括调试符号,即我正在破坏自己的努力.
The issue was that I was using ld
with -s
which means "strip all", including debug symbols, i.e. I was undermining my own effort.
正确的命令应该是:
nasm -g -F dwarf -f elf64 hello.asm
ld -o hello hello.o
现在,使用gdb:
$ gdb ./hello
GNU gdb (Ubuntu 8.1-0ubuntu3.2) 8.1.0.20180409-git
[.. snip copyright ..]
Reading symbols from ./hello...done.
(gdb) b _start
Breakpoint 1 at 0x400080: file hello.asm, line 7.
(gdb) run
Starting program: /home/terry/hello
Breakpoint 1, _start () at hello.asm:7
7 xor ebx, 0
(gdb)
$
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