On 07/05/2017 11:38 AM, H.J. Lu wrote: > On x86-64, __tls_get_addr has to realigns stack so that binaries compiled by > GCCs older than GCC 4.9.4: > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58066 > > continue to work even if vector instructions are used by functions called > from __tls_get_addr, which assumes 16-byte stack alignment as specified > by x86-64 psABI. > > We are considering to add an alternative interface, ___tls_get_addr, to > glibc, which doesn't realign stack. Compilers, which properly align stack > for TLS, call generate call to ___tls_get_addr, instead of __tls_get_addr, > if ___tls_get_addr is available. > > Any comments?
Overall I agree with the idea. However, the triple underscore will lead to eventual human error, can we avoid that error by changing the name in an meaningful way? I don't care what you choose really. -- Cheers, Carlos.
