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<stdint.h> includes. (#150303)
https://github.com/llvm/llvm-project/issues/149993
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<img width="662" alt="smash newline"
src="https://github.com/user-attachments/assets/99625bcb-efd6-4733-aa01-2a2167ee686f">
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Use a size smaller than the smallest supported page size so that we
don't
clobber over any guard pages, which may result in a segfault before
__stack_chk_fail can be called.
Also, move __stack_chk_fail outside of our namespace.
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__stack_chk_fail should be provided by libc.a, not startup files.
Add __stack_chk_fail to existing linux and arm entrypoints. On Windows
(when
not targeting MinGW), it seems that the corresponding function
identifier is
__security_check_cookie, so no entrypoint is added for Windows.
Baremetal
targets also ought to be compileable with `-fstack-protector*`
There is no common header for this prototype, since calls to
__stack_chk_fail
are meant to be inserted by the compiler upon function return when
compiled
`-fstack-protector*`.
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