[GitHub] [incubator-nuttx] xiaoxiang781216 opened a new issue #1208: Does it still true to set the LSB of entry point to 1 manually for NXFLAT?

[GitBox <gi...@apache.org>]

xiaoxiang781216 opened a new issue #1208:
URL: https://github.com/apache/incubator-nuttx/issues/1208


   nuttx/arch/arm/src/armv7-m/arm_initialstate.c:
   ```
   #ifdef CONFIG_NXFLAT
     /* Make certain that bit 0 is set in the main entry address.  This is
      * only an issue when NXFLAT is enabled.  NXFLAT doesn't know anything
      * about thumb; the addresses that NXFLAT sets are based on file header
      * info and won't have bit 0 set.
      */
   
     tcb->entry.main = (main_t)((uint32_t)tcb->entry.main | 1);
   #endif
   ```
   I can't understand how we can pass the funtion pointer in other cases without this hack? Why only the task/thread entry pointer need do this?
   @patacongo could you give some history information?


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