riscv/musl - musl - Gitea: Git with a cup of tea

Alex Xu (Hello71) 63c67053a3 in early stage ldso before __dls2b, call mprotect with __syscall if LTO is enabled, gcc hoists the call to ___errno_location outside the loop even though the access to errno is gated behind head != &ldso because ___errno_location is marked __attribute__((const)). this causes the program to crash because TLS is not yet initialized when called from __dls2. this is also possible if LTO is not enabled; even though gcc 11 doesn't do it, it is still wrong to use errno here. since the start and end are already aligned, we can simply call __syscall instead of using global errno. Fixes: `e13a2b8953` ("implement PT_GNU_RELRO support")	4 years ago
..
dlstart.c	define and use internal macros for hidden visibility, weak refs	8 years ago
dynlink.c	in early stage ldso before __dls2b, call mprotect with __syscall	4 years ago

Alex Xu (Hello71) 63c67053a3 in early stage ldso before __dls2b, call mprotect with __syscall

if LTO is enabled, gcc hoists the call to ___errno_location outside the
loop even though the access to errno is gated behind head != &ldso
because ___errno_location is marked __attribute__((const)). this causes
the program to crash because TLS is not yet initialized when called from
__dls2. this is also possible if LTO is not enabled; even though gcc 11
doesn't do it, it is still wrong to use errno here.

since the start and end are already aligned, we can simply call
__syscall instead of using global errno.

Fixes: e13a2b8953 ("implement PT_GNU_RELRO support")

4 years ago

dlstart.c define and use internal macros for hidden visibility, weak refs 8 years ago

dynlink.c in early stage ldso before __dls2b, call mprotect with __syscall 4 years ago