suoyuanG commented on issue #17040:
URL: https://github.com/apache/nuttx/issues/17040#issuecomment-3760178693

   > @snikeguo but it it is not used, why saving it will fix the issue? BTW, 
did you test PR #17815 ?
   > 
   > Hey @suoyuanG could you please let us know what do you thing about it?
   
   I don't think this is a problem. The documentation mentions that 
__aeabi_read_tp is allowed to modify ip, and registers $r1-$r3 must be 
preserved.
   
   > Implementations of this function should corrupt only the result register 
(r0), and the non-parameter integer core registers are allowed to be corrupted 
by the AAPCS32 (ip, lr, and CPSR). Registers r1-r3 must be preserved.
   >
   > 
https://github.com/ARM-software/abi-aa/blob/main/rtabi32/rtabi32.rst#thread-local-storage-new-in-v2-01


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