The branch-protection types are target specific, not the same on arm
and aarch64. This currently affects pac-ret+b-key, but there will be
a new type on aarch64 that is not relevant for arm.
gcc/ChangeLog:
* config/aarch64/aarch64-opts.h (enum aarch64_key_type): Rename to ...
(enum aarch_key_type): ... this.
* config/aarch64/aarch64.cc (aarch_handle_no_branch_protection): Copy.
(aarch_handle_standard_branch_protection): Copy.
(aarch_handle_pac_ret_protection): Copy.
(aarch_handle_pac_ret_leaf): Copy.
(aarch_handle_pac_ret_b_key): Copy.
(aarch_handle_bti_protection): Copy.
* config/arm/aarch-common.cc (aarch_handle_no_branch_protection):
Remove.
(aarch_handle_standard_branch_protection): Remove.
(aarch_handle_pac_ret_protection): Remove.
(aarch_handle_pac_ret_leaf): Remove.
(aarch_handle_pac_ret_b_key): Remove.
(aarch_handle_bti_protection): Remove.
* config/arm/aarch-common.h (enum aarch_key_type): Remove.
(struct aarch_branch_protect_type): Declare.
* config/arm/arm-c.cc (arm_cpu_builtins): Remove aarch_ra_sign_key.
* config/arm/arm.cc (aarch_handle_no_branch_protection): Copy.
(aarch_handle_standard_branch_protection): Copy.
(aarch_handle_pac_ret_protection): Copy.
(aarch_handle_pac_ret_leaf): Copy.
(aarch_handle_bti_protection): Copy.
(arm_configure_build_target): Copy.
* config/arm/arm.opt: Remove aarch_ra_sign_key.
---
gcc/config/aarch64/aarch64-opts.h | 6 ++--
gcc/config/aarch64/aarch64.cc | 55 +++++++++++++++++++++++++++++++
gcc/config/arm/aarch-common.cc | 55 -------------------------------
gcc/config/arm/aarch-common.h | 11 +++----
gcc/config/arm/arm-c.cc | 2 --
gcc/config/arm/arm.cc | 52 +++++++++++++++++++++++++----
gcc/config/arm/arm.opt | 3 --
7 files changed, 109 insertions(+), 75 deletions(-)
diff --git a/gcc/config/aarch64/aarch64-opts.h
b/gcc/config/aarch64/aarch64-opts.h
index 7e8f1babed8..75ef00b60d4 100644
--- a/gcc/config/aarch64/aarch64-opts.h
+++ b/gcc/config/aarch64/aarch64-opts.h
@@ -103,9 +103,9 @@ enum stack_protector_guard {
};
/* The key type that -msign-return-address should use. */
-enum aarch64_key_type {
- AARCH64_KEY_A,
- AARCH64_KEY_B
+enum aarch_key_type {
+ AARCH_KEY_A,
+ AARCH_KEY_B
};
#endif
diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc
index 661ac12cacc..734980f78ec 100644
--- a/gcc/config/aarch64/aarch64.cc
+++ b/gcc/config/aarch64/aarch64.cc
@@ -18517,6 +18517,61 @@ aarch64_set_asm_isa_flags (aarch64_feature_flags flags)
aarch64_set_asm_isa_flags (&global_options, flags);
}
+static void
+aarch_handle_no_branch_protection (void)
+{
+ aarch_ra_sign_scope = AARCH_FUNCTION_NONE;
+ aarch_enable_bti = 0;
+}
+
+static void
+aarch_handle_standard_branch_protection (void)
+{
+ aarch_ra_sign_scope = AARCH_FUNCTION_NON_LEAF;
+ aarch_ra_sign_key = AARCH_KEY_A;
+ aarch_enable_bti = 1;
+}
+
+static void
+aarch_handle_pac_ret_protection (void)
+{
+ aarch_ra_sign_scope = AARCH_FUNCTION_NON_LEAF;
+ aarch_ra_sign_key = AARCH_KEY_A;
+}
+
+static void
+aarch_handle_pac_ret_leaf (void)
+{
+ aarch_ra_sign_scope = AARCH_FUNCTION_ALL;
+}
+
+static void
+aarch_handle_pac_ret_b_key (void)
+{
+ aarch_ra_sign_key = AARCH_KEY_B;
+}
+
+static void
+aarch_handle_bti_protection (void)
+{
+ aarch_enable_bti = 1;
+}
+
+static const struct aarch_branch_protect_type aarch_pac_ret_subtypes[] = {
+ { "leaf", false, aarch_handle_pac_ret_leaf, NULL, 0 },
+ { "b-key", false, aarch_handle_pac_ret_b_key, NULL, 0 },
+ { NULL, false, NULL, NULL, 0 }
+};
+
+const struct aarch_branch_protect_type aarch_branch_protect_types[] = {
+ { "none", true, aarch_handle_no_branch_protection, NULL, 0 },
+ { "standard", true, aarch_handle_standard_branch_protection, NULL, 0 },
+ { "pac-ret", false, aarch_handle_pac_ret_protection, aarch_pac_ret_subtypes,
+ ARRAY_SIZE (aarch_pac_ret_subtypes) },
+ { "bti", false, aarch_handle_bti_protection, NULL, 0 },
+ { NULL, false, NULL, NULL, 0 }
+};
+
/* Implement TARGET_OPTION_OVERRIDE. This is called once in the beginning
and is used to parse the -m{cpu,tune,arch} strings and setup the initial
tuning structs. In particular it must set selected_tune and
diff --git a/gcc/config/arm/aarch-common.cc b/gcc/config/arm/aarch-common.cc
index 159c61b786c..92e1248f83f 100644
--- a/gcc/config/arm/aarch-common.cc
+++ b/gcc/config/arm/aarch-common.cc
@@ -659,61 +659,6 @@ arm_md_asm_adjust (vec<rtx> &outputs, vec<rtx> &
/*inputs*/,
return saw_asm_flag ? seq : NULL;
}
-static void
-aarch_handle_no_branch_protection (void)
-{
- aarch_ra_sign_scope = AARCH_FUNCTION_NONE;
- aarch_enable_bti = 0;
-}
-
-static void
-aarch_handle_standard_branch_protection (void)
-{
- aarch_ra_sign_scope = AARCH_FUNCTION_NON_LEAF;
- aarch_ra_sign_key = AARCH_KEY_A;
- aarch_enable_bti = 1;
-}
-
-static void
-aarch_handle_pac_ret_protection (void)
-{
- aarch_ra_sign_scope = AARCH_FUNCTION_NON_LEAF;
- aarch_ra_sign_key = AARCH_KEY_A;
-}
-
-static void
-aarch_handle_pac_ret_leaf (void)
-{
- aarch_ra_sign_scope = AARCH_FUNCTION_ALL;
-}
-
-static void
-aarch_handle_pac_ret_b_key (void)
-{
- aarch_ra_sign_key = AARCH_KEY_B;
-}
-
-static void
-aarch_handle_bti_protection (void)
-{
- aarch_enable_bti = 1;
-}
-
-static const struct aarch_branch_protect_type aarch_pac_ret_subtypes[] = {
- { "leaf", false, aarch_handle_pac_ret_leaf, NULL, 0 },
- { "b-key", false, aarch_handle_pac_ret_b_key, NULL, 0 },
- { NULL, false, NULL, NULL, 0 }
-};
-
-static const struct aarch_branch_protect_type aarch_branch_protect_types[] = {
- { "none", true, aarch_handle_no_branch_protection, NULL, 0 },
- { "standard", true, aarch_handle_standard_branch_protection, NULL, 0 },
- { "pac-ret", false, aarch_handle_pac_ret_protection, aarch_pac_ret_subtypes,
- ARRAY_SIZE (aarch_pac_ret_subtypes) },
- { "bti", false, aarch_handle_bti_protection, NULL, 0 },
- { NULL, false, NULL, NULL, 0 }
-};
-
/* In-place split *str at delim, return *str and set *str to the tail
of the string or NULL if the end is reached. */
diff --git a/gcc/config/arm/aarch-common.h b/gcc/config/arm/aarch-common.h
index f72e21127fc..90d2112408f 100644
--- a/gcc/config/arm/aarch-common.h
+++ b/gcc/config/arm/aarch-common.h
@@ -44,12 +44,7 @@ enum aarch_function_type {
AARCH_FUNCTION_ALL
};
-/* The key type that -msign-return-address should use. */
-enum aarch_key_type {
- AARCH_KEY_A,
- AARCH_KEY_B
-};
-
+/* Specifies a -mbranch-protection= argument. */
struct aarch_branch_protect_type
{
/* The type's name that the user passes to the branch-protection option
@@ -64,4 +59,8 @@ struct aarch_branch_protect_type
unsigned int num_subtypes;
};
+/* Target specific data and callbacks for parsing -mbranch-protection=.
+ The first item is used to reset the branch-protection settings. */
+extern const struct aarch_branch_protect_type aarch_branch_protect_types[];
+
#endif /* GCC_AARCH_COMMON_H */
diff --git a/gcc/config/arm/arm-c.cc b/gcc/config/arm/arm-c.cc
index d3d93ceba00..204403b3ff4 100644
--- a/gcc/config/arm/arm-c.cc
+++ b/gcc/config/arm/arm-c.cc
@@ -248,8 +248,6 @@ arm_cpu_builtins (struct cpp_reader* pfile)
{
unsigned int pac = 1;
- gcc_assert (aarch_ra_sign_key == AARCH_KEY_A);
-
if (aarch_ra_sign_scope == AARCH_FUNCTION_ALL)
pac |= 0x4;
diff --git a/gcc/config/arm/arm.cc b/gcc/config/arm/arm.cc
index 5681073a948..5cb0f2858b7 100644
--- a/gcc/config/arm/arm.cc
+++ b/gcc/config/arm/arm.cc
@@ -3250,6 +3250,52 @@ static sbitmap isa_all_fpubits_internal;
static sbitmap isa_all_fpbits;
static sbitmap isa_quirkbits;
+static void
+aarch_handle_no_branch_protection (void)
+{
+ aarch_ra_sign_scope = AARCH_FUNCTION_NONE;
+ aarch_enable_bti = 0;
+}
+
+static void
+aarch_handle_standard_branch_protection (void)
+{
+ aarch_ra_sign_scope = AARCH_FUNCTION_NON_LEAF;
+ aarch_enable_bti = 1;
+}
+
+static void
+aarch_handle_pac_ret_protection (void)
+{
+ aarch_ra_sign_scope = AARCH_FUNCTION_NON_LEAF;
+}
+
+static void
+aarch_handle_pac_ret_leaf (void)
+{
+ aarch_ra_sign_scope = AARCH_FUNCTION_ALL;
+}
+
+static void
+aarch_handle_bti_protection (void)
+{
+ aarch_enable_bti = 1;
+}
+
+static const struct aarch_branch_protect_type aarch_pac_ret_subtypes[] = {
+ { "leaf", false, aarch_handle_pac_ret_leaf, NULL, 0 },
+ { NULL, false, NULL, NULL, 0 }
+};
+
+const struct aarch_branch_protect_type aarch_branch_protect_types[] = {
+ { "none", true, aarch_handle_no_branch_protection, NULL, 0 },
+ { "standard", true, aarch_handle_standard_branch_protection, NULL, 0 },
+ { "pac-ret", false, aarch_handle_pac_ret_protection, aarch_pac_ret_subtypes,
+ ARRAY_SIZE (aarch_pac_ret_subtypes) },
+ { "bti", false, aarch_handle_bti_protection, NULL, 0 },
+ { NULL, false, NULL, NULL, 0 }
+};
+
/* Configure a build target TARGET from the user-specified options OPTS and
OPTS_SET. If WARN_COMPATIBLE, emit a diagnostic if both the CPU and
architecture have been specified, but the two are not identical. */
@@ -3299,12 +3345,6 @@ arm_configure_build_target (struct arm_build_target
*target,
{
aarch_validate_mbranch_protection (opts->x_arm_branch_protection_string,
"-mbranch-protection=");
-
- if (aarch_ra_sign_key != AARCH_KEY_A)
- {
- warning (0, "invalid key type for %<-mbranch-protection=%>");
- aarch_ra_sign_key = AARCH_KEY_A;
- }
}
if (arm_selected_arch)
diff --git a/gcc/config/arm/arm.opt b/gcc/config/arm/arm.opt
index 88299dabc3a..bd8bb00d035 100644
--- a/gcc/config/arm/arm.opt
+++ b/gcc/config/arm/arm.opt
@@ -30,9 +30,6 @@ enum aarch_function_type aarch_ra_sign_scope =
AARCH_FUNCTION_NONE
TargetVariable
unsigned aarch_enable_bti = 0
-TargetVariable
-enum aarch_key_type aarch_ra_sign_key = AARCH_KEY_A
-
Enum
Name(tls_type) Type(enum arm_tls_type)
TLS dialect to use:
--
2.25.1
