anjiahao1 opened a new pull request, #14285: URL: https://github.com/apache/nuttx/pull/14285
## Summary This PR implements the loading of position-independent code (PIC). It works by utilizing the Global Offset Table (GOT) and a PIC register. The code is compiled as position-independent using GCC flags` -fpic`,` -fPIE`,` -mno-pic-data-is-text-relative`, and `-msingle-pic-base`. Before jumping to the position-independent code, the GOT offset and the PIC register are properly configured, allowing the code to execute as position-independent. If the dynamic module is in a ROMFS or TMPFS, it can even be executed in-place (XIP), saving memory in the text segment. ## Impact modlib elf PIC ## Testing `./tools/configure.sh mps3-an547:picostest` build a PIC ostest elf module, and run it `./tools/configure.sh mps3-an547:ap` `./tools/configure.sh mps3-an547:bl` build a PIC nuttx image ap, and use bootloader to boot it more info in `Documentation/platforms/arm/mps/boards/mps3-an547/index.rst` and [gcc option](https://gcc.gnu.org/onlinedocs/gcc/ARM-Options.html) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
