d8b290898c
* Initial forward-edge CFI implementation Give the user the option to start all basic blocks that are targets of indirect branches with the BTI instruction introduced by the Branch Target Identification extension to the Arm instruction set architecture. Copyright (c) 2022, Arm Limited. * Refactor `from_artifacts` to avoid second `make_executable` (#1) This involves "parsing" twice but this is parsing just the header of an ELF file so it's not a very intensive operation and should be ok to do twice. * Address the code review feedback Copyright (c) 2022, Arm Limited. Co-authored-by: Alex Crichton <alex@alexcrichton.com>
62 lines
1.9 KiB
Rust
62 lines
1.9 KiB
Rust
use crate::cdsl::isa::TargetIsa;
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use crate::cdsl::settings::{SettingGroup, SettingGroupBuilder};
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use crate::shared::Definitions as SharedDefinitions;
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fn define_settings(_shared: &SettingGroup) -> SettingGroup {
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let mut setting = SettingGroupBuilder::new("arm64");
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setting.add_bool(
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"has_lse",
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"Has Large System Extensions (FEAT_LSE) support.",
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"",
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false,
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);
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setting.add_bool(
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"has_pauth",
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"Has Pointer authentication (FEAT_PAuth) support; enables the use of \
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non-HINT instructions, but does not have an effect on code generation \
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by itself.",
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"",
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false,
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);
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setting.add_bool(
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"sign_return_address_all",
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"If function return address signing is enabled, then apply it to all \
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functions; does not have an effect on code generation by itself.",
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"",
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false,
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);
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setting.add_bool(
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"sign_return_address",
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"Use pointer authentication instructions to sign function return \
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addresses; HINT-space instructions using the A key are generated \
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and simple functions that do not use the stack are not affected \
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unless overridden by other settings.",
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"",
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false,
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);
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setting.add_bool(
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"sign_return_address_with_bkey",
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"Use the B key with pointer authentication instructions instead of \
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the default A key; does not have an effect on code generation by \
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itself. Some platform ABIs may require this, for example.",
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"",
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false,
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);
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setting.add_bool(
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"use_bti",
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"Use Branch Target Identification (FEAT_BTI) instructions.",
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"",
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false,
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);
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setting.build()
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}
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pub(crate) fn define(shared_defs: &mut SharedDefinitions) -> TargetIsa {
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let settings = define_settings(&shared_defs.settings);
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TargetIsa::new("arm64", settings)
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}
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