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Posted to commits@nuttx.apache.org by "xiaotailang (via GitHub)" <gi...@apache.org> on 2023/06/29 06:56:23 UTC
[GitHub] [nuttx] xiaotailang opened a new issue, #9645: how to debug elf
xiaotailang opened a new issue, #9645:
URL: https://github.com/apache/nuttx/issues/9645
Hello everyone,
I have compiled my application into an ELF file, for example, "myapp_elf", following the instructions in this [issue.](https://github.com/apache/nuttx/issues/2323), After downloading it to the development board, I want to debug this "myapp_elf" file. What configuration options should I add to support debugging ELF files? I have referred to this link for debugging [methods,](https://cwiki.apache.org/confluence/display/NUTTX/Debugging+ELF+Loadable+Modules) but it is not very convenient to use and sometimes results in errors. Are there any other better alternatives?
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[GitHub] [nuttx] acassis commented on issue #9645: how to debug elf
Posted by "acassis (via GitHub)" <gi...@apache.org>.
acassis commented on issue #9645:
URL: https://github.com/apache/nuttx/issues/9645#issuecomment-1613097066
Hi @xiaotailang please use these debug options:
```
Build Setup --->
Debug Options --->
[*] Enable Debug Features
[*] Enable Error Output
[*] Enable Warnings Output
[*] Enable Informational Debug Output
[*] Binary Loader Debug Features
[*] Binary Loader Error Output
[*] Binary Loader Warnings Output
[*] Binary Loader Informational Output
```
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[GitHub] [nuttx] xiaotailang commented on issue #9645: how to debug elf
Posted by "xiaotailang (via GitHub)" <gi...@apache.org>.
xiaotailang commented on issue #9645:
URL: https://github.com/apache/nuttx/issues/9645#issuecomment-1639163369
Hi @acassis I followed the previous advice and enabled the debug configuration. After tracing, I discovered the issue causing my ELF file to fail loading. It was because I used global variables in my code, and the compilation options lacked "-fno-common". Later, when I used GDB to debug the ELF file "myapp_elf", I found that in most cases, breakpoints couldn't be triggered, and the "step" command couldn't enter function internals. However, I'm not sure if it's a problem with GDB or the compiled ELF file itself. The compilation options I used were "-Os" and "-g". I also tried the "-O0" and "-g" options, but if I compile the ELF with the "-O0" option, it results in an error when loading the ELF. Is there a complete method for debugging ELF files using GDB?
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[GitHub] [nuttx] xiaotailang commented on issue #9645: how to debug elf
Posted by "xiaotailang (via GitHub)" <gi...@apache.org>.
xiaotailang commented on issue #9645:
URL: https://github.com/apache/nuttx/issues/9645#issuecomment-1617127081
@acassis okay thank you very much !
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