6e45fa95be
If both `-fptrauth-init-fini` and `-fptrauth-calls` are passed, sign
function pointers in `llvm.global_ctors` and `llvm.global_dtors` with
constant discriminator 0xD9D4
(`ptrauth_string_discriminator("init_fini")`). Additionally, if
`-fptrauth-init-fini-address-discrimination` is passed, address
discrimination is used for signing (otherwise, just constant
discriminator is used).
For address discrimination, we use it's special form since uses of
`llvm.global_{c|d}tors` are disallowed (see
`Verifier::visitGlobalVariable`) and we can't emit `getelementptr`
expressions referencing these special arrays. A signed ctor/dtor pointer
with special address discrimination applied looks like the following:
```
ptr ptrauth (ptr @foo, i32 0, i64 55764, ptr inttoptr (i64 1 to ptr))
```
122 lines
5.6 KiB
C
122 lines
5.6 KiB
C
//// Note: preprocessor features exactly match corresponding clang driver flags. However, some flags are only intended to be used in combination with other ones.
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//// For example, -fptrauth-init-fini will not affect codegen without -fptrauth-calls, but the preprocessor feature would be set anyway.
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// RUN: %clang_cc1 -E %s -triple=aarch64 -fptrauth-intrinsics | \
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// RUN: FileCheck %s --check-prefixes=INTRIN,NOCALLS,NORETS,NOVPTR_ADDR_DISCR,NOVPTR_TYPE_DISCR,NOTYPE_INFO_DISCR,NOFUNC,NOINITFINI,NOINITFINI_ADDR_DISCR,NOGOTOS
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// RUN: %clang_cc1 -E %s -triple=aarch64 -fptrauth-calls | \
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// RUN: FileCheck %s --check-prefixes=NOINTRIN,CALLS,NORETS,NOVPTR_ADDR_DISCR,NOVPTR_TYPE_DISCR,NOTYPE_INFO_DISCR,NOFUNC,NOINITFINI,NOINITFINI_ADDR_DISCR,NOGOTOS
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// RUN: %clang_cc1 -E %s -triple=aarch64 -fptrauth-returns | \
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// RUN: FileCheck %s --check-prefixes=NOINTRIN,NOCALLS,RETS,NOVPTR_ADDR_DISCR,NOVPTR_TYPE_DISCR,NOTYPE_INFO_DISCR,NOFUNC,NOINITFINI,NOINITFINI_ADDR_DISCR,NOGOTOS
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// RUN: %clang_cc1 -E %s -triple=aarch64 -fptrauth-vtable-pointer-address-discrimination | \
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// RUN: FileCheck %s --check-prefixes=NOINTRIN,NOCALLS,NORETS,VPTR_ADDR_DISCR,NOVPTR_TYPE_DISCR,NOTYPE_INFO_DISCR,NOFUNC,NOINITFINI,NOINITFINI_ADDR_DISCR,NOGOTOS
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// RUN: %clang_cc1 -E %s -triple=aarch64 -fptrauth-vtable-pointer-type-discrimination | \
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// RUN: FileCheck %s --check-prefixes=NOINTRIN,NOCALLS,NORETS,NOVPTR_ADDR_DISCR,VPTR_TYPE_DISCR,NOTYPE_INFO_DISCR,NOFUNC,NOINITFINI,NOINITFINI_ADDR_DISCR,NOGOTOS
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// RUN: %clang_cc1 -E %s -triple=aarch64 -fptrauth-type-info-vtable-pointer-discrimination | \
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// RUN: FileCheck %s --check-prefixes=NOINTRIN,NOCALLS,NORETS,NOVPTR_ADDR_DISCR,NOVPTR_TYPE_DISCR,TYPE_INFO_DISCR,NOFUNC,NOINITFINI,NOINITFINI_ADDR_DISCR,NOGOTOS
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// RUN: %clang_cc1 -E %s -triple=aarch64 -fptrauth-function-pointer-type-discrimination | \
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// RUN: FileCheck %s --check-prefixes=NOINTRIN,NOCALLS,NORETS,NOVPTR_ADDR_DISCR,NOVPTR_TYPE_DISCR,NOTYPE_INFO_DISCR,FUNC,NOINITFINI,NOINITFINI_ADDR_DISCR,NOGOTOS
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// RUN: %clang_cc1 -E %s -triple=aarch64 -fptrauth-init-fini | \
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// RUN: FileCheck %s --check-prefixes=NOINTRIN,NOCALLS,NORETS,NOVPTR_ADDR_DISCR,NOVPTR_TYPE_DISCR,NOTYPE_INFO_DISCR,NOFUNC,INITFINI,NOINITFINI_ADDR_DISCR,NOGOTOS
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// RUN: %clang_cc1 -E %s -triple=aarch64 -fptrauth-init-fini-address-discrimination | \
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// RUN: FileCheck %s --check-prefixes=NOINTRIN,NOCALLS,NORETS,NOVPTR_ADDR_DISCR,NOVPTR_TYPE_DISCR,NOTYPE_INFO_DISCR,NOFUNC,NOINITFINI,INITFINI_ADDR_DISCR,NOGOTOS
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// RUN: %clang_cc1 -E %s -triple=aarch64 -fptrauth-indirect-gotos | \
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// RUN: FileCheck %s --check-prefixes=NOINTRIN,NOCALLS,NORETS,NOVPTR_ADDR_DISCR,NOVPTR_TYPE_DISCR,NOTYPE_INFO_DISCR,NOFUNC,NOINITFINI,NOINITFINI_ADDR_DISCR,GOTOS
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#if __has_feature(ptrauth_intrinsics)
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// INTRIN: has_ptrauth_intrinsics
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void has_ptrauth_intrinsics() {}
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#else
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// NOINTRIN: no_ptrauth_intrinsics
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void no_ptrauth_intrinsics() {}
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#endif
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#if __has_feature(ptrauth_calls)
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// CALLS: has_ptrauth_calls
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void has_ptrauth_calls() {}
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#else
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// NOCALLS: no_ptrauth_calls
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void no_ptrauth_calls() {}
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#endif
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// This is always enabled when ptrauth_calls is enabled
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#if __has_feature(ptrauth_member_function_pointer_type_discrimination)
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// CALLS: has_ptrauth_member_function_pointer_type_discrimination
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void has_ptrauth_member_function_pointer_type_discrimination() {}
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#else
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// NOCALLS: no_ptrauth_member_function_pointer_type_discrimination
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void no_ptrauth_member_function_pointer_type_discrimination() {}
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#endif
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#if __has_feature(ptrauth_returns)
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// RETS: has_ptrauth_returns
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void has_ptrauth_returns() {}
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#else
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// NORETS: no_ptrauth_returns
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void no_ptrauth_returns() {}
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#endif
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#if __has_feature(ptrauth_vtable_pointer_address_discrimination)
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// VPTR_ADDR_DISCR: has_ptrauth_vtable_pointer_address_discrimination
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void has_ptrauth_vtable_pointer_address_discrimination() {}
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#else
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// NOVPTR_ADDR_DISCR: no_ptrauth_vtable_pointer_address_discrimination
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void no_ptrauth_vtable_pointer_address_discrimination() {}
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#endif
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#if __has_feature(ptrauth_vtable_pointer_type_discrimination)
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// VPTR_TYPE_DISCR: has_ptrauth_vtable_pointer_type_discrimination
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void has_ptrauth_vtable_pointer_type_discrimination() {}
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#else
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// NOVPTR_TYPE_DISCR: no_ptrauth_vtable_pointer_type_discrimination
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void no_ptrauth_vtable_pointer_type_discrimination() {}
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#endif
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#if __has_feature(ptrauth_type_info_vtable_pointer_discrimination)
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// TYPE_INFO_DISCR: has_ptrauth_type_info_vtable_pointer_discrimination
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void has_ptrauth_type_info_vtable_pointer_discrimination() {}
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#else
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// NOTYPE_INFO_DISCR: no_ptrauth_type_info_vtable_pointer_discrimination
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void no_ptrauth_type_info_vtable_pointer_discrimination() {}
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#endif
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#if __has_feature(ptrauth_function_pointer_type_discrimination)
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// FUNC: has_ptrauth_function_pointer_type_discrimination
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void has_ptrauth_function_pointer_type_discrimination() {}
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#else
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// NOFUNC: no_ptrauth_function_pointer_type_discrimination
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void no_ptrauth_function_pointer_type_discrimination() {}
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#endif
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#if __has_feature(ptrauth_init_fini)
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// INITFINI: has_ptrauth_init_fini
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void has_ptrauth_init_fini() {}
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#else
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// NOINITFINI: no_ptrauth_init_fini
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void no_ptrauth_init_fini() {}
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#endif
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#if __has_feature(ptrauth_init_fini_address_discrimination)
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// INITFINI_ADDR_DISCR: has_ptrauth_init_fini_address_discrimination
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void has_ptrauth_init_fini_address_discrimination() {}
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#else
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// NOINITFINI_ADDR_DISCR: no_ptrauth_init_fini_address_discrimination
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void no_ptrauth_init_fini_address_discrimination() {}
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#endif
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#if __has_feature(ptrauth_indirect_gotos)
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// GOTOS: has_ptrauth_indirect_gotos
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void has_ptrauth_indirect_gotos() {}
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#else
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// NOGOTOS: no_ptrauth_indirect_gotos
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void no_ptrauth_indirect_gotos() {}
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#endif
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