https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55610
--- Comment #12 from Eric Gallager <egallager at gcc dot gnu.org> --- (In reply to CVS Commits from comment #11) > The master branch has been updated by Iain D Sandoe <ia...@gcc.gnu.org>: > > https://gcc.gnu.org/g:22a982409323feb203401d345488a5a9c18e6733 > > commit r12-5759-g22a982409323feb203401d345488a5a9c18e6733 > Author: Iain Sandoe <i...@sandoe.co.uk> > Date: Sat Nov 13 12:39:09 2021 +0000 > > Darwin: Rewrite host PCH support [PR 55610]. > > We need to revise the PCH memory allocation scheme to enable > support for PIE on aarch64. The rewrite uses a similar scheme > to the one used on Linux. > > We attempt to identify VM segments for each arch/OS version that > are always available to the compiler (note this is not general, > it only needs to work for the cc1* exes). > > If we cannot find the preferred segment we fall back to allowing > the kernel to supply one - this is more likely to fail when the > PCH read-in occurs (but that is trapped). > > In doing this we obviate the need to unmap any part of the > compiler __DATA segment - thus fixing PR 55610. > > Signed-off-by: Iain Sandoe <i...@sandoe.co.uk> > > gcc/ChangeLog: > > PR target/55610 > * config/host-darwin.c (TRY_EMPTY_VM_SPACE, > SAFE_ALLOC_SIZE): New. > (darwin_gt_pch_get_address): Rewrite to use nominated > memory segments rather than part of the compiler __DATA > segment. > (darwin_gt_pch_use_address): Likewise. So, ok to close this as FIXED now?
