[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
This commit is contained in:
Sam Tebbs
Sam Tebbs
parent
7e47198b80
commit
8fc16d7252
@ -1,3 +1,47 @@
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2019-05-29 Sam Tebbs <sam.tebbs@arm.com>
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* config/aarch64/aarch64-builtins.c (aarch64_builtins): Add
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AARCH64_PAUTH_BUILTIN_AUTIB1716 and AARCH64_PAUTH_BUILTIN_PACIB1716.
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* config/aarch64/aarch64-builtins.c (aarch64_init_pauth_hint_builtins):
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Add autib1716 and pacib1716 initialisation.
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* config/aarch64/aarch64-builtins.c (aarch64_expand_builtin): Add checks
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for autib1716 and pacib1716.
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* config/aarch64/aarch64-protos.h (aarch64_key_type,
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aarch64_post_cfi_startproc): Define.
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* config/aarch64/aarch64-protos.h (aarch64_ra_sign_key): Define extern.
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* config/aarch64/aarch64.c (aarch64_handle_standard_branch_protection,
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aarch64_handle_pac_ret_protection): Set default sign key to A.
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* config/aarch64/aarch64.c (aarch64_expand_epilogue,
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aarch64_expand_prologue): Add check for b-key.
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* config/aarch64/aarch64.c (aarch64_ra_sign_key,
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aarch64_post_cfi_startproc, aarch64_handle_pac_ret_b_key): Define.
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* config/aarch64/aarch64.h (TARGET_ASM_POST_CFI_STARTPROC): Define.
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* config/aarch64/aarch64.c (aarch64_pac_ret_subtypes): Add "b-key".
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* config/aarch64/aarch64.md (unspec): Add UNSPEC_AUTIA1716,
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UNSPEC_AUTIB1716, UNSPEC_AUTIASP, UNSPEC_AUTIBSP, UNSPEC_PACIA1716,
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UNSPEC_PACIB1716, UNSPEC_PACIASP, UNSPEC_PACIBSP.
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* config/aarch64/aarch64.md (do_return): Add check for b-key.
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* config/aarch64/aarch64.md (<pauth_mnem_prefix>sp): Replace
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pauth_hint_num_a with pauth_hint_num.
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* config/aarch64/aarch64.md (<pauth_mnem_prefix>1716): Replace
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pauth_hint_num_a with pauth_hint_num.
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* config/aarch64/aarch64.opt (msign-return-address=): Deprecate.
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* config/aarch64/iterators.md (PAUTH_LR_SP): Add UNSPEC_AUTIASP,
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UNSPEC_AUTIBSP, UNSPEC_PACIASP, UNSPEC_PACIBSP.
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* config/aarch64/iterators.md (PAUTH_17_16): Add UNSPEC_AUTIA1716,
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UNSPEC_AUTIB1716, UNSPEC_PACIA1716, UNSPEC_PACIB1716.
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* config/aarch64/iterators.md (pauth_mnem_prefix): Add UNSPEC_AUTIA1716,
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UNSPEC_AUTIB1716, UNSPEC_PACIA1716, UNSPEC_PACIB1716, UNSPEC_AUTIASP,
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UNSPEC_AUTIBSP, UNSPEC_PACIASP, UNSPEC_PACIBSP.
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* config/aarch64/iterators.md (pauth_hint_num_a): Replace
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UNSPEC_PACI1716 and UNSPEC_AUTI1716 with UNSPEC_PACIA1716 and
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UNSPEC_AUTIA1716 respectively.
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* config/aarch64/iterators.md (pauth_hint_num_a): Rename to pauth_hint_num
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and add UNSPEC_PACIBSP, UNSPEC_AUTIBSP, UNSPEC_PACIB1716, UNSPEC_AUTIB1716.
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* doc/invoke.texi (-mbranch-protection): Add b-key type.
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* config/aarch64/aarch64-bti-insert.c (aarch64_pac_insn_p): Rename
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UNSPEC_PACISP to UNSPEC_PACIASP and UNSPEC_PACIBSP.
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2019-05-29 Jakub Jelinek <jakub@redhat.com>
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* gimplify.c (struct gimplify_omp_ctx): Add clauses member.
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@ -106,7 +106,9 @@ aarch64_pac_insn_p (rtx x)
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int unspec_val = XINT (sub, 1);
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switch (unspec_val)
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{
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case UNSPEC_PACISP:
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case UNSPEC_PACIASP:
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/* fall-through. */
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case UNSPEC_PACIBSP:
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return true;
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default:
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@ -432,6 +432,8 @@ enum aarch64_builtins
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/* ARMv8.3-A Pointer Authentication Builtins. */
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AARCH64_PAUTH_BUILTIN_AUTIA1716,
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AARCH64_PAUTH_BUILTIN_PACIA1716,
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AARCH64_PAUTH_BUILTIN_AUTIB1716,
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AARCH64_PAUTH_BUILTIN_PACIB1716,
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AARCH64_PAUTH_BUILTIN_XPACLRI,
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/* Special cased Armv8.3-A Complex FMA by Lane quad Builtins. */
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AARCH64_SIMD_FCMLA_LANEQ_BUILTIN_BASE,
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@ -1051,6 +1053,14 @@ aarch64_init_pauth_hint_builtins (void)
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= add_builtin_function ("__builtin_aarch64_pacia1716", ftype_pointer_auth,
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AARCH64_PAUTH_BUILTIN_PACIA1716, BUILT_IN_MD, NULL,
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NULL_TREE);
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aarch64_builtin_decls[AARCH64_PAUTH_BUILTIN_AUTIB1716]
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= add_builtin_function ("__builtin_aarch64_autib1716", ftype_pointer_auth,
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AARCH64_PAUTH_BUILTIN_AUTIB1716, BUILT_IN_MD, NULL,
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NULL_TREE);
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aarch64_builtin_decls[AARCH64_PAUTH_BUILTIN_PACIB1716]
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= add_builtin_function ("__builtin_aarch64_pacib1716", ftype_pointer_auth,
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AARCH64_PAUTH_BUILTIN_PACIB1716, BUILT_IN_MD, NULL,
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NULL_TREE);
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aarch64_builtin_decls[AARCH64_PAUTH_BUILTIN_XPACLRI]
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= add_builtin_function ("__builtin_aarch64_xpaclri", ftype_pointer_strip,
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AARCH64_PAUTH_BUILTIN_XPACLRI, BUILT_IN_MD, NULL,
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@ -1540,6 +1550,8 @@ aarch64_expand_builtin (tree exp,
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case AARCH64_PAUTH_BUILTIN_AUTIA1716:
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case AARCH64_PAUTH_BUILTIN_PACIA1716:
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case AARCH64_PAUTH_BUILTIN_AUTIB1716:
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case AARCH64_PAUTH_BUILTIN_PACIB1716:
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case AARCH64_PAUTH_BUILTIN_XPACLRI:
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arg0 = CALL_EXPR_ARG (exp, 0);
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op0 = force_reg (Pmode, expand_normal (arg0));
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@ -1563,8 +1575,24 @@ aarch64_expand_builtin (tree exp,
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{
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tree arg1 = CALL_EXPR_ARG (exp, 1);
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rtx op1 = force_reg (Pmode, expand_normal (arg1));
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icode = (fcode == AARCH64_PAUTH_BUILTIN_PACIA1716
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? CODE_FOR_paci1716 : CODE_FOR_auti1716);
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switch (fcode)
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{
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case AARCH64_PAUTH_BUILTIN_AUTIA1716:
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icode = CODE_FOR_autia1716;
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break;
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case AARCH64_PAUTH_BUILTIN_AUTIB1716:
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icode = CODE_FOR_autib1716;
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break;
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case AARCH64_PAUTH_BUILTIN_PACIA1716:
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icode = CODE_FOR_pacia1716;
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break;
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case AARCH64_PAUTH_BUILTIN_PACIB1716:
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icode = CODE_FOR_pacib1716;
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break;
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default:
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icode = 0;
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gcc_unreachable ();
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}
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rtx x16_reg = gen_rtx_REG (Pmode, R16_REGNUM);
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rtx x17_reg = gen_rtx_REG (Pmode, R17_REGNUM);
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@ -396,8 +396,17 @@ enum simd_immediate_check {
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AARCH64_CHECK_MOV = AARCH64_CHECK_ORR | AARCH64_CHECK_BIC
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};
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/* The key type that -msign-return-address should use. */
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enum aarch64_key_type {
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AARCH64_KEY_A,
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AARCH64_KEY_B
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};
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extern enum aarch64_key_type aarch64_ra_sign_key;
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extern struct tune_params aarch64_tune_params;
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void aarch64_post_cfi_startproc (void);
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poly_int64 aarch64_initial_elimination_offset (unsigned, unsigned);
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int aarch64_get_condition_code (rtx);
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bool aarch64_address_valid_for_prefetch_p (rtx, bool);
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@ -1172,6 +1172,8 @@ static const struct processor *selected_arch;
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static const struct processor *selected_cpu;
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static const struct processor *selected_tune;
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enum aarch64_key_type aarch64_ra_sign_key = AARCH64_KEY_A;
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/* The current tuning set. */
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struct tune_params aarch64_tune_params = generic_tunings;
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@ -1241,6 +1243,7 @@ static enum aarch64_parse_opt_result
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aarch64_handle_standard_branch_protection (char* str, char* rest)
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{
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aarch64_ra_sign_scope = AARCH64_FUNCTION_NON_LEAF;
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aarch64_ra_sign_key = AARCH64_KEY_A;
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aarch64_enable_bti = 1;
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if (rest)
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{
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@ -1255,6 +1258,7 @@ aarch64_handle_pac_ret_protection (char* str ATTRIBUTE_UNUSED,
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char* rest ATTRIBUTE_UNUSED)
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{
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aarch64_ra_sign_scope = AARCH64_FUNCTION_NON_LEAF;
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aarch64_ra_sign_key = AARCH64_KEY_A;
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return AARCH64_PARSE_OK;
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}
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@ -1266,6 +1270,14 @@ aarch64_handle_pac_ret_leaf (char* str ATTRIBUTE_UNUSED,
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return AARCH64_PARSE_OK;
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}
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static enum aarch64_parse_opt_result
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aarch64_handle_pac_ret_b_key (char* str ATTRIBUTE_UNUSED,
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char* rest ATTRIBUTE_UNUSED)
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{
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aarch64_ra_sign_key = AARCH64_KEY_B;
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return AARCH64_PARSE_OK;
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}
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static enum aarch64_parse_opt_result
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aarch64_handle_bti_protection (char* str ATTRIBUTE_UNUSED,
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char* rest ATTRIBUTE_UNUSED)
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@ -1276,6 +1288,7 @@ aarch64_handle_bti_protection (char* str ATTRIBUTE_UNUSED,
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static const struct aarch64_branch_protect_type aarch64_pac_ret_subtypes[] = {
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{ "leaf", aarch64_handle_pac_ret_leaf, NULL, 0 },
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{ "b-key", aarch64_handle_pac_ret_b_key, NULL, 0 },
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{ NULL, NULL, NULL, 0 }
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};
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@ -4852,7 +4865,7 @@ aarch64_return_address_signing_enabled (void)
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gcc_assert (cfun->machine->frame.laid_out);
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/* If signing scope is AARCH64_FUNCTION_NON_LEAF, we only sign a leaf function
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if it's LR is pushed onto stack. */
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if its LR is pushed onto stack. */
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return (aarch64_ra_sign_scope == AARCH64_FUNCTION_ALL
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|| (aarch64_ra_sign_scope == AARCH64_FUNCTION_NON_LEAF
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&& cfun->machine->frame.reg_offset[LR_REGNUM] >= 0));
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@ -5651,7 +5664,17 @@ aarch64_expand_prologue (void)
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/* Sign return address for functions. */
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if (aarch64_return_address_signing_enabled ())
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{
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insn = emit_insn (gen_pacisp ());
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switch (aarch64_ra_sign_key)
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{
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case AARCH64_KEY_A:
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insn = emit_insn (gen_paciasp ());
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break;
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case AARCH64_KEY_B:
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insn = emit_insn (gen_pacibsp ());
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break;
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default:
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gcc_unreachable ();
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}
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add_reg_note (insn, REG_CFA_TOGGLE_RA_MANGLE, const0_rtx);
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RTX_FRAME_RELATED_P (insn) = 1;
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}
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@ -5907,7 +5930,17 @@ aarch64_expand_epilogue (bool for_sibcall)
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if (aarch64_return_address_signing_enabled ()
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&& (for_sibcall || !TARGET_ARMV8_3 || crtl->calls_eh_return))
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{
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insn = emit_insn (gen_autisp ());
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switch (aarch64_ra_sign_key)
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{
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case AARCH64_KEY_A:
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insn = emit_insn (gen_autiasp ());
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break;
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case AARCH64_KEY_B:
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insn = emit_insn (gen_autibsp ());
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break;
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default:
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gcc_unreachable ();
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}
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add_reg_note (insn, REG_CFA_TOGGLE_RA_MANGLE, const0_rtx);
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RTX_FRAME_RELATED_P (insn) = 1;
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}
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@ -15330,6 +15363,18 @@ aarch64_declare_function_name (FILE *stream, const char* name,
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ASM_OUTPUT_LABEL (stream, name);
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}
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/* Triggered after a .cfi_startproc directive is emitted into the assembly file.
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Used to output the .cfi_b_key_frame directive when signing the current
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function with the B key. */
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void
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aarch64_post_cfi_startproc (FILE *f, tree ignored ATTRIBUTE_UNUSED)
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{
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if (aarch64_return_address_signing_enabled ()
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&& aarch64_ra_sign_key == AARCH64_KEY_B)
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asm_fprintf (f, "\t.cfi_b_key_frame\n");
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}
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/* Implements TARGET_ASM_FILE_START. Output the assembly header. */
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static void
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@ -19341,6 +19386,9 @@ aarch64_libgcc_floating_mode_supported_p
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#define TARGET_RUN_TARGET_SELFTESTS selftest::aarch64_run_selftests
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#endif /* #if CHECKING_P */
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#undef TARGET_ASM_POST_CFI_STARTPROC
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#define TARGET_ASM_POST_CFI_STARTPROC aarch64_post_cfi_startproc
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struct gcc_target targetm = TARGET_INITIALIZER;
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#include "gt-aarch64.h"
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@ -512,6 +512,9 @@ extern unsigned aarch64_architecture_version;
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#define ASM_DECLARE_FUNCTION_NAME(STR, NAME, DECL) \
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aarch64_declare_function_name (STR, NAME, DECL)
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/* Output assembly strings after .cfi_startproc is emitted. */
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#define ASM_POST_CFI_STARTPROC aarch64_post_cfi_startproc
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/* For EH returns X4 contains the stack adjustment. */
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#define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, R4_REGNUM)
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#define EH_RETURN_HANDLER_RTX aarch64_eh_return_handler_rtx ()
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@ -125,8 +125,10 @@
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)
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(define_c_enum "unspec" [
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UNSPEC_AUTI1716
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UNSPEC_AUTISP
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UNSPEC_AUTIA1716
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UNSPEC_AUTIB1716
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UNSPEC_AUTIASP
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UNSPEC_AUTIBSP
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UNSPEC_CASESI
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UNSPEC_CRC32B
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UNSPEC_CRC32CB
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@ -169,8 +171,10 @@
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UNSPEC_LD4_LANE
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UNSPEC_MB
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UNSPEC_NOP
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UNSPEC_PACI1716
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UNSPEC_PACISP
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UNSPEC_PACIA1716
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UNSPEC_PACIB1716
|
||||
UNSPEC_PACIASP
|
||||
UNSPEC_PACIBSP
|
||||
UNSPEC_PRLG_STK
|
||||
UNSPEC_REV
|
||||
UNSPEC_RBIT
|
||||
@ -739,8 +743,12 @@
|
||||
if (aarch64_return_address_signing_enabled ()
|
||||
&& TARGET_ARMV8_3
|
||||
&& !crtl->calls_eh_return)
|
||||
return "retaa";
|
||||
|
||||
{
|
||||
if (aarch64_ra_sign_key == AARCH64_KEY_B)
|
||||
return "retab";
|
||||
else
|
||||
return "retaa";
|
||||
}
|
||||
return "ret";
|
||||
}
|
||||
[(set_attr "type" "branch")]
|
||||
@ -6811,7 +6819,7 @@
|
||||
[(set (reg:DI R30_REGNUM)
|
||||
(unspec:DI [(reg:DI R30_REGNUM) (reg:DI SP_REGNUM)] PAUTH_LR_SP))]
|
||||
""
|
||||
"hint\t<pauth_hint_num_a> // <pauth_mnem_prefix>asp";
|
||||
"hint\t<pauth_hint_num> // <pauth_mnem_prefix>sp";
|
||||
)
|
||||
|
||||
;; Signing/Authenticating X17 using X16 as the salt.
|
||||
@ -6820,7 +6828,7 @@
|
||||
[(set (reg:DI R17_REGNUM)
|
||||
(unspec:DI [(reg:DI R17_REGNUM) (reg:DI R16_REGNUM)] PAUTH_17_16))]
|
||||
""
|
||||
"hint\t<pauth_hint_num_a> // <pauth_mnem_prefix>a1716";
|
||||
"hint\t<pauth_hint_num> // <pauth_mnem_prefix>1716";
|
||||
)
|
||||
|
||||
;; Stripping the signature in R30.
|
||||
|
||||
@ -1516,9 +1516,11 @@
|
||||
(define_int_iterator FMAXMIN_UNS [UNSPEC_FMAX UNSPEC_FMIN
|
||||
UNSPEC_FMAXNM UNSPEC_FMINNM])
|
||||
|
||||
(define_int_iterator PAUTH_LR_SP [UNSPEC_PACISP UNSPEC_AUTISP])
|
||||
(define_int_iterator PAUTH_LR_SP [UNSPEC_PACIASP UNSPEC_AUTIASP
|
||||
UNSPEC_PACIBSP UNSPEC_AUTIBSP])
|
||||
|
||||
(define_int_iterator PAUTH_17_16 [UNSPEC_PACI1716 UNSPEC_AUTI1716])
|
||||
(define_int_iterator PAUTH_17_16 [UNSPEC_PACIA1716 UNSPEC_AUTIA1716
|
||||
UNSPEC_PACIB1716 UNSPEC_AUTIB1716])
|
||||
|
||||
(define_int_iterator VQDMULH [UNSPEC_SQDMULH UNSPEC_SQRDMULH])
|
||||
|
||||
@ -1797,16 +1799,34 @@
|
||||
(UNSPEC_FCVTZU "fcvtzu")])
|
||||
|
||||
;; Pointer authentication mnemonic prefix.
|
||||
(define_int_attr pauth_mnem_prefix [(UNSPEC_PACISP "paci")
|
||||
(UNSPEC_AUTISP "auti")
|
||||
(UNSPEC_PACI1716 "paci")
|
||||
(UNSPEC_AUTI1716 "auti")])
|
||||
(define_int_attr pauth_mnem_prefix [(UNSPEC_PACIASP "pacia")
|
||||
(UNSPEC_PACIBSP "pacib")
|
||||
(UNSPEC_PACIA1716 "pacia")
|
||||
(UNSPEC_PACIB1716 "pacib")
|
||||
(UNSPEC_AUTIASP "autia")
|
||||
(UNSPEC_AUTIBSP "autib")
|
||||
(UNSPEC_AUTIA1716 "autia")
|
||||
(UNSPEC_AUTIB1716 "autib")])
|
||||
|
||||
;; Pointer authentication HINT number for NOP space instructions using A Key.
|
||||
(define_int_attr pauth_hint_num_a [(UNSPEC_PACISP "25")
|
||||
(UNSPEC_AUTISP "29")
|
||||
(UNSPEC_PACI1716 "8")
|
||||
(UNSPEC_AUTI1716 "12")])
|
||||
(define_int_attr pauth_key [(UNSPEC_PACIASP "AARCH64_KEY_A")
|
||||
(UNSPEC_PACIBSP "AARCH64_KEY_B")
|
||||
(UNSPEC_PACIA1716 "AARCH64_KEY_A")
|
||||
(UNSPEC_PACIB1716 "AARCH64_KEY_B")
|
||||
(UNSPEC_AUTIASP "AARCH64_KEY_A")
|
||||
(UNSPEC_AUTIBSP "AARCH64_KEY_B")
|
||||
(UNSPEC_AUTIA1716 "AARCH64_KEY_A")
|
||||
(UNSPEC_AUTIB1716 "AARCH64_KEY_B")])
|
||||
|
||||
;; Pointer authentication HINT number for NOP space instructions using A and
|
||||
;; B key.
|
||||
(define_int_attr pauth_hint_num [(UNSPEC_PACIASP "25")
|
||||
(UNSPEC_PACIBSP "27")
|
||||
(UNSPEC_AUTIASP "29")
|
||||
(UNSPEC_AUTIBSP "31")
|
||||
(UNSPEC_PACIA1716 "8")
|
||||
(UNSPEC_PACIB1716 "10")
|
||||
(UNSPEC_AUTIA1716 "12")
|
||||
(UNSPEC_AUTIB1716 "14")])
|
||||
|
||||
(define_int_attr perm_insn [(UNSPEC_ZIP1 "zip") (UNSPEC_ZIP2 "zip")
|
||||
(UNSPEC_TRN1 "trn") (UNSPEC_TRN2 "trn")
|
||||
|
||||
@ -632,7 +632,8 @@ Objective-C and Objective-C++ Dialects}.
|
||||
-mlow-precision-recip-sqrt -mlow-precision-sqrt -mlow-precision-div @gol
|
||||
-mpc-relative-literal-loads @gol
|
||||
-msign-return-address=@var{scope} @gol
|
||||
-mbranch-protection=@var{none}|@var{standard}|@var{pac-ret}[+@var{leaf}]|@var{bti} @gol
|
||||
-mbranch-protection=@var{none}|@var{standard}|@var{pac-ret}[+@var{leaf}
|
||||
+@var{b-key}]|@var{bti} @gol
|
||||
-march=@var{name} -mcpu=@var{name} -mtune=@var{name} @gol
|
||||
-moverride=@var{string} -mverbose-cost-dump @gol
|
||||
-mstack-protector-guard=@var{guard} -mstack-protector-guard-reg=@var{sysreg} @gol
|
||||
@ -15900,7 +15901,7 @@ functions, and @samp{all}, which enables pointer signing for all functions. The
|
||||
default value is @samp{none}. This option has been deprecated by
|
||||
-mbranch-protection.
|
||||
|
||||
@item -mbranch-protection=@var{none}|@var{standard}|@var{pac-ret}[+@var{leaf}]|@var{bti}
|
||||
@item -mbranch-protection=@var{none}|@var{standard}|@var{pac-ret}[+@var{leaf}+@var{b-key}]|@var{bti}
|
||||
@opindex mbranch-protection
|
||||
Select the branch protection features to use.
|
||||
@samp{none} is the default and turns off all types of branch protection.
|
||||
@ -15911,7 +15912,8 @@ level.
|
||||
level: signing functions that save the return address to memory (non-leaf
|
||||
functions will practically always do this) using the a-key. The optional
|
||||
argument @samp{leaf} can be used to extend the signing to include leaf
|
||||
functions.
|
||||
functions. The optional argument @samp{b-key} can be used to sign the functions
|
||||
with the B-key instead of the A-key.
|
||||
@samp{bti} turns on branch target identification mechanism.
|
||||
|
||||
@item -msve-vector-bits=@var{bits}
|
||||
|
||||
@ -1,3 +1,12 @@
|
||||
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
|
||||
|
||||
2019-05-29 Jakub Jelinek <jakub@redhat.com>
|
||||
|
||||
* c-c++-common/gomp/lastprivate-conditional-2.c (foo): Don't expect
|
||||
|
||||
@ -1,3 +1,18 @@
|
||||
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.
|
||||
|
||||
2019-05-28 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
|
||||
|
||||
* config/sparc/sol2-unwind.h [__arch64__] (sparc64_is_sighandler):
|
||||
|
||||
@ -35,6 +35,23 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
||||
#define MD_FROB_UPDATE_CONTEXT(context, fs) \
|
||||
aarch64_frob_update_context (context, fs)
|
||||
|
||||
static inline int
|
||||
aarch64_cie_signed_with_b_key (struct _Unwind_Context *context)
|
||||
{
|
||||
const struct dwarf_fde *fde = _Unwind_Find_FDE (context->bases.func,
|
||||
&context->bases);
|
||||
if (fde != NULL)
|
||||
{
|
||||
const struct dwarf_cie *cie = get_cie (fde);
|
||||
if (cie != NULL)
|
||||
{
|
||||
char *aug_str = cie->augmentation;
|
||||
return strchr (aug_str, 'B') == NULL ? 0 : 1;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Do AArch64 private extraction on ADDR based on context info CONTEXT and
|
||||
unwind frame info FS. If ADDR is signed, we do address authentication on it
|
||||
using CFA of current frame. */
|
||||
@ -43,9 +60,11 @@ static inline void *
|
||||
aarch64_post_extract_frame_addr (struct _Unwind_Context *context,
|
||||
_Unwind_FrameState *fs, void *addr)
|
||||
{
|
||||
if (fs->regs.reg[DWARF_REGNUM_AARCH64_RA_STATE].loc.offset & 0x1)
|
||||
if (context->flags & RA_SIGNED_BIT)
|
||||
{
|
||||
_Unwind_Word salt = (_Unwind_Word) context->cfa;
|
||||
if (aarch64_cie_signed_with_b_key (context) != 0)
|
||||
return __builtin_aarch64_autib1716 (addr, salt);
|
||||
return __builtin_aarch64_autia1716 (addr, salt);
|
||||
}
|
||||
else
|
||||
@ -62,9 +81,14 @@ aarch64_post_frob_eh_handler_addr (struct _Unwind_Context *current,
|
||||
ATTRIBUTE_UNUSED,
|
||||
void *handler_addr)
|
||||
{
|
||||
if (current->flags & RA_A_SIGNED_BIT)
|
||||
return __builtin_aarch64_pacia1716 (handler_addr,
|
||||
if (current->flags & RA_SIGNED_BIT)
|
||||
{
|
||||
if (aarch64_cie_signed_with_b_key (current))
|
||||
return __builtin_aarch64_pacib1716 (handler_addr,
|
||||
(_Unwind_Word) current->cfa);
|
||||
return __builtin_aarch64_pacia1716 (handler_addr,
|
||||
(_Unwind_Word) current->cfa);
|
||||
}
|
||||
else
|
||||
return handler_addr;
|
||||
}
|
||||
@ -79,7 +103,7 @@ aarch64_frob_update_context (struct _Unwind_Context *context,
|
||||
{
|
||||
if (fs->regs.reg[DWARF_REGNUM_AARCH64_RA_STATE].loc.offset & 0x1)
|
||||
/* The flag is used for re-authenticating EH handler's address. */
|
||||
context->flags |= RA_A_SIGNED_BIT;
|
||||
context->flags |= RA_SIGNED_BIT;
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
@ -334,6 +334,9 @@ get_cie_encoding (const struct dwarf_cie *cie)
|
||||
/* LSDA encoding. */
|
||||
else if (*aug == 'L')
|
||||
p++;
|
||||
/* aarch64 b-key pointer authentication. */
|
||||
else if (*aug == 'B')
|
||||
p++;
|
||||
/* Otherwise end of string, or unknown augmentation. */
|
||||
else
|
||||
return DW_EH_PE_absptr;
|
||||
|
||||
@ -136,8 +136,9 @@ struct _Unwind_Context
|
||||
#define SIGNAL_FRAME_BIT ((~(_Unwind_Word) 0 >> 1) + 1)
|
||||
/* Context which has version/args_size/by_value fields. */
|
||||
#define EXTENDED_CONTEXT_BIT ((~(_Unwind_Word) 0 >> 2) + 1)
|
||||
/* Bit reserved on AArch64, return address has been signed with A key. */
|
||||
#define RA_A_SIGNED_BIT ((~(_Unwind_Word) 0 >> 3) + 1)
|
||||
/* Bit reserved on AArch64, return address has been signed with A or B
|
||||
key. */
|
||||
#define RA_SIGNED_BIT ((~(_Unwind_Word) 0 >> 3) + 1)
|
||||
_Unwind_Word flags;
|
||||
/* 0 for now, can be increased when further fields are added to
|
||||
struct _Unwind_Context. */
|
||||
@ -502,6 +503,11 @@ extract_cie_info (const struct dwarf_cie *cie, struct _Unwind_Context *context,
|
||||
fs->signal_frame = 1;
|
||||
aug += 1;
|
||||
}
|
||||
/* aarch64 B-key pointer authentication. */
|
||||
else if (aug[0] == 'B')
|
||||
{
|
||||
aug += 1;
|
||||
}
|
||||
|
||||
/* Otherwise we have an unknown augmentation string.
|
||||
Bail unless we saw a 'z' prefix. */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user