On Fri, 2 Nov 2018, Sam Tebbs wrote: > On 11/02/2018 05:28 PM, Sam Tebbs wrote: > > > Hi all, > > > > This patch adds a new target hook called "asm_post_cfi_startproc". This > > hook is > > intended to be used by the aarch64 backend to emit a directive that enables > > support for unwinding frames signed with the pointer authentication B-key. > > This > > hook is triggered after the ".cfi_startproc" directive is emitted in > > gcc/dwarf2out.c. > > > > Bootstrapped on aarch64-none-linux-gnu and tested on aarch64-none-elf with > > no regressions. > > > > Ok for trunk?
Can you explain why existing prologue/cfi emission points are not enough? > > gcc/ > > 2018-11-02 Sam Tebbs<sam.te...@arm.com> > > > > * doc/tm.texi (TARGET_ASM_POST_CFI_STARTPROC): Define. > > * doc/tm.texi.in (TARGET_ASM_POST_CFI_STARTPROC): Define. > > * dwarf2out.c (dwarf2out_do_cfi_startproc): Trigger the hook. > > * hooks.c (hook_void_FILEptr_tree): Define. > > * hooks.h (hook_void_FILEptr_tree): Define. > > * target.def (post_cfi_startproc): Define. > > CCing global reviewers and dwarf maintainers. > > -- Richard Biener <rguent...@suse.de> SUSE LINUX GmbH, GF: Felix Imendoerffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nuernberg)
