[PATCH 3/3][GCC][AARCH64] Add support for pointer authentication B key
gcc/
2019-05-29 Sam Tebbs <sam.tebbs@arm.com>
* config/aarch64/aarch64-builtins.c (aarch64_builtins): Add
AARCH64_PAUTH_BUILTIN_AUTIB1716 and AARCH64_PAUTH_BUILTIN_PACIB1716.
* config/aarch64/aarch64-builtins.c (aarch64_init_pauth_hint_builtins):
Add autib1716 and pacib1716 initialisation.
* config/aarch64/aarch64-builtins.c (aarch64_expand_builtin): Add checks
for autib1716 and pacib1716.
* config/aarch64/aarch64-protos.h (aarch64_key_type,
aarch64_post_cfi_startproc): Define.
* config/aarch64/aarch64-protos.h (aarch64_ra_sign_key): Define extern.
* config/aarch64/aarch64.c (aarch64_handle_standard_branch_protection,
aarch64_handle_pac_ret_protection): Set default sign key to A.
* config/aarch64/aarch64.c (aarch64_expand_epilogue,
aarch64_expand_prologue): Add check for b-key.
* config/aarch64/aarch64.c (aarch64_ra_sign_key,
aarch64_post_cfi_startproc, aarch64_handle_pac_ret_b_key): Define.
* config/aarch64/aarch64.h (TARGET_ASM_POST_CFI_STARTPROC): Define.
* config/aarch64/aarch64.c (aarch64_pac_ret_subtypes): Add "b-key".
* config/aarch64/aarch64.md (unspec): Add UNSPEC_AUTIA1716,
UNSPEC_AUTIB1716, UNSPEC_AUTIASP, UNSPEC_AUTIBSP, UNSPEC_PACIA1716,
UNSPEC_PACIB1716, UNSPEC_PACIASP, UNSPEC_PACIBSP.
* config/aarch64/aarch64.md (do_return): Add check for b-key.
* config/aarch64/aarch64.md (<pauth_mnem_prefix>sp): Replace
pauth_hint_num_a with pauth_hint_num.
* config/aarch64/aarch64.md (<pauth_mnem_prefix>1716): Replace
pauth_hint_num_a with pauth_hint_num.
* config/aarch64/aarch64.opt (msign-return-address=): Deprecate.
* config/aarch64/iterators.md (PAUTH_LR_SP): Add UNSPEC_AUTIASP,
UNSPEC_AUTIBSP, UNSPEC_PACIASP, UNSPEC_PACIBSP.
* config/aarch64/iterators.md (PAUTH_17_16): Add UNSPEC_AUTIA1716,
UNSPEC_AUTIB1716, UNSPEC_PACIA1716, UNSPEC_PACIB1716.
* config/aarch64/iterators.md (pauth_mnem_prefix): Add UNSPEC_AUTIA1716,
UNSPEC_AUTIB1716, UNSPEC_PACIA1716, UNSPEC_PACIB1716, UNSPEC_AUTIASP,
UNSPEC_AUTIBSP, UNSPEC_PACIASP, UNSPEC_PACIBSP.
* config/aarch64/iterators.md (pauth_hint_num_a): Replace
UNSPEC_PACI1716 and UNSPEC_AUTI1716 with UNSPEC_PACIA1716 and
UNSPEC_AUTIA1716 respectively.
* config/aarch64/iterators.md (pauth_hint_num_a): Rename to pauth_hint_num
and add UNSPEC_PACIBSP, UNSPEC_AUTIBSP, UNSPEC_PACIB1716, UNSPEC_AUTIB1716.
* doc/invoke.texi (-mbranch-protection): Add b-key type.
* config/aarch64/aarch64-bti-insert.c (aarch64_pac_insn_p): Rename
UNSPEC_PACISP to UNSPEC_PACIASP and UNSPEC_PACIBSP.
gcc/testsuite
2019-05-29 Sam Tebbs <sam.tebbs@arm.com>
* gcc.target/aarch64/return_address_sign_b_1.c: New file.
* gcc.target/aarch64/return_address_sign_b_2.c: New file.
* gcc.target/aarch64/return_address_sign_b_3.c: New file.
* gcc.target/aarch64/return_address_sign_b_exception.c: New file.
* gcc.target/aarch64/return_address_sign_ab_exception.c: New file.
* gcc.target/aarch64/return_address_sign_builtin.c: New file
libgcc/
2019-05-29 Sam Tebbs <sam.tebbs@arm.com>
* config/aarch64/aarch64-unwind.h (aarch64_cie_signed_with_b_key): New
function.
* config/aarch64/aarch64-unwind.h (aarch64_post_extract_frame_addr,
aarch64_post_frob_eh_handler_addr): Add check for b-key.
* config/aarch64/aarch64-unwind-h (aarch64_post_extract_frame_addr,
aarch64_post_frob_eh_handler_addr, aarch64_post_frob_update_context):
Rename RA_A_SIGNED_BIT to RA_SIGNED_BIT.
* unwind-dw2-fde.c (get_cie_encoding): Add check for 'B' in augmentation
string.
* unwind-dw2.c (extract_cie_info): Add check for 'B' in augmentation
string.
(RA_A_SIGNED_BIT): Rename to RA_SIGNED_BIT.
From-SVN: r271735
8fc16d7252