[libc-commits] [libc] [libc][arm32] define argc type and stack alignment (PR #96367)

[via libc-commits]

enh-google wrote:

> https://github.com/ARM-software/abi-aa/blob/main/aapcs32/aapcs32.rst#6212stack-constraints-at-a-public-interface mentions that ARM32 is double word aligned.
> 
> I could not find a citation for the size of argc on the stack, but from reading Bionic's loader and the Linux kernel's ELF loader, it seems this is the same for all targets (8B despite argc being an int).

i'm assuming this is a typo here --- s/size/alignment/. bionic quite clearly believes it's 4 bytes in _size_ and has no particular belief about the alignment at all: https://android.googlesource.com/platform/bionic/+/main/libc/private/KernelArgumentBlock.h#34

https://github.com/llvm/llvm-project/pull/96367