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Posted to commits@nuttx.apache.org by GitBox <gi...@apache.org> on 2021/07/22 23:28:45 UTC

[GitHub] [incubator-nuttx] patacongo edited a comment on issue #4206: mksyscall need handle 64bit type correctly

patacongo edited a comment on issue #4206:
URL: https://github.com/apache/incubator-nuttx/issues/4206#issuecomment-884916207


   On 64-bit platforms, I believe that both uintptr_t and off_t are 64-bits.  But I am not sure of that.  Need to check.  These combinations are OK in the current code:
   
   - uintptr_t 32-bits, off_t 32-bits
   - uintptr_t 64-bits, off_t 32-bits (we shouldn't really support this)
   - uintptr_t 64-bits, off_t 64 bits.
   
   This is not OK.
   
   - uintptr_t 32-bits, off_t 64-bits.
   
   And what about these (not currently a problem because they do not currently support syscalls):
   
   - 8-bit architectures that usually have 16-bit uintptr_t
   - eZ80 that has a 24-bit uintptr_t
   


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