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[PAC][Driver] Support ptrauth flags only on ARM64 Darwin
Most ptrauth flags are ABI-affecting, so they should not be exposed to end users. Under certain conditions, some ptrauth driver flags are intended to be used for ARM64 Darwin, so allow them in this case. Leave `-faarch64-jump-table-hardening` available for all AArch64 targets since it's not ABI-affecting.
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4 files changed

+93
-116
lines changed

4 files changed

+93
-116
lines changed

‎clang/lib/Driver/ToolChains/Clang.cpp‎

Lines changed: 0 additions & 28 deletions
Original file line numberDiff line numberDiff line change
@@ -1808,34 +1808,6 @@ void Clang::AddAArch64TargetArgs(const ArgList &Args,
18081808

18091809
AddUnalignedAccessWarning(CmdArgs);
18101810

1811-
Args.addOptInFlag(CmdArgs, options::OPT_fptrauth_intrinsics,
1812-
options::OPT_fno_ptrauth_intrinsics);
1813-
Args.addOptInFlag(CmdArgs, options::OPT_fptrauth_calls,
1814-
options::OPT_fno_ptrauth_calls);
1815-
Args.addOptInFlag(CmdArgs, options::OPT_fptrauth_returns,
1816-
options::OPT_fno_ptrauth_returns);
1817-
Args.addOptInFlag(CmdArgs, options::OPT_fptrauth_auth_traps,
1818-
options::OPT_fno_ptrauth_auth_traps);
1819-
Args.addOptInFlag(
1820-
CmdArgs, options::OPT_fptrauth_vtable_pointer_address_discrimination,
1821-
options::OPT_fno_ptrauth_vtable_pointer_address_discrimination);
1822-
Args.addOptInFlag(
1823-
CmdArgs, options::OPT_fptrauth_vtable_pointer_type_discrimination,
1824-
options::OPT_fno_ptrauth_vtable_pointer_type_discrimination);
1825-
Args.addOptInFlag(
1826-
CmdArgs, options::OPT_fptrauth_type_info_vtable_pointer_discrimination,
1827-
options::OPT_fno_ptrauth_type_info_vtable_pointer_discrimination);
1828-
Args.addOptInFlag(
1829-
CmdArgs, options::OPT_fptrauth_function_pointer_type_discrimination,
1830-
options::OPT_fno_ptrauth_function_pointer_type_discrimination);
1831-
1832-
Args.addOptInFlag(CmdArgs, options::OPT_fptrauth_indirect_gotos,
1833-
options::OPT_fno_ptrauth_indirect_gotos);
1834-
Args.addOptInFlag(CmdArgs, options::OPT_fptrauth_init_fini,
1835-
options::OPT_fno_ptrauth_init_fini);
1836-
Args.addOptInFlag(CmdArgs,
1837-
options::OPT_fptrauth_init_fini_address_discrimination,
1838-
options::OPT_fno_ptrauth_init_fini_address_discrimination);
18391811
Args.addOptInFlag(CmdArgs, options::OPT_faarch64_jump_table_hardening,
18401812
options::OPT_fno_aarch64_jump_table_hardening);
18411813
}

‎clang/lib/Driver/ToolChains/Darwin.cpp‎

Lines changed: 37 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -3067,6 +3067,40 @@ bool Darwin::isSizedDeallocationUnavailable() const {
30673067
return TargetVersion < sizedDeallocMinVersion(OS);
30683068
}
30693069

3070+
static void addPointerAuthFlags(const llvm::opt::ArgList &DriverArgs,
3071+
llvm::opt::ArgStringList &CC1Args) {
3072+
DriverArgs.addOptInFlag(CC1Args, options::OPT_fptrauth_intrinsics,
3073+
options::OPT_fno_ptrauth_intrinsics);
3074+
3075+
DriverArgs.addOptInFlag(CC1Args, options::OPT_fptrauth_calls,
3076+
options::OPT_fno_ptrauth_calls);
3077+
3078+
DriverArgs.addOptInFlag(CC1Args, options::OPT_fptrauth_returns,
3079+
options::OPT_fno_ptrauth_returns);
3080+
3081+
DriverArgs.addOptInFlag(CC1Args, options::OPT_fptrauth_auth_traps,
3082+
options::OPT_fno_ptrauth_auth_traps);
3083+
3084+
DriverArgs.addOptInFlag(
3085+
CC1Args, options::OPT_fptrauth_vtable_pointer_address_discrimination,
3086+
options::OPT_fno_ptrauth_vtable_pointer_address_discrimination);
3087+
3088+
DriverArgs.addOptInFlag(
3089+
CC1Args, options::OPT_fptrauth_vtable_pointer_type_discrimination,
3090+
options::OPT_fno_ptrauth_vtable_pointer_type_discrimination);
3091+
3092+
DriverArgs.addOptInFlag(
3093+
CC1Args, options::OPT_fptrauth_type_info_vtable_pointer_discrimination,
3094+
options::OPT_fno_ptrauth_type_info_vtable_pointer_discrimination);
3095+
3096+
DriverArgs.addOptInFlag(
3097+
CC1Args, options::OPT_fptrauth_function_pointer_type_discrimination,
3098+
options::OPT_fno_ptrauth_function_pointer_type_discrimination);
3099+
3100+
DriverArgs.addOptInFlag(CC1Args, options::OPT_fptrauth_indirect_gotos,
3101+
options::OPT_fno_ptrauth_indirect_gotos);
3102+
}
3103+
30703104
void Darwin::addClangTargetOptions(
30713105
const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args,
30723106
Action::OffloadKind DeviceOffloadKind) const {
@@ -3143,6 +3177,9 @@ void Darwin::addClangTargetOptions(
31433177
if (!RequiresSubdirectorySearch)
31443178
CC1Args.push_back("-fno-modulemap-allow-subdirectory-search");
31453179
}
3180+
3181+
if (getTriple().isAArch64())
3182+
addPointerAuthFlags(DriverArgs, CC1Args);
31463183
}
31473184

31483185
void Darwin::addClangCC1ASTargetOptions(

‎clang/lib/Driver/ToolChains/Linux.cpp‎

Lines changed: 10 additions & 43 deletions
Original file line numberDiff line numberDiff line change
@@ -494,49 +494,16 @@ std::string Linux::ComputeEffectiveClangTriple(const llvm::opt::ArgList &Args,
494494
// options represent the default signing schema.
495495
static void handlePAuthABI(const Driver &D, const ArgList &DriverArgs,
496496
ArgStringList &CC1Args) {
497-
if (!DriverArgs.hasArg(options::OPT_fptrauth_intrinsics,
498-
options::OPT_fno_ptrauth_intrinsics))
499-
CC1Args.push_back("-fptrauth-intrinsics");
500-
501-
if (!DriverArgs.hasArg(options::OPT_fptrauth_calls,
502-
options::OPT_fno_ptrauth_calls))
503-
CC1Args.push_back("-fptrauth-calls");
504-
505-
if (!DriverArgs.hasArg(options::OPT_fptrauth_returns,
506-
options::OPT_fno_ptrauth_returns))
507-
CC1Args.push_back("-fptrauth-returns");
508-
509-
if (!DriverArgs.hasArg(options::OPT_fptrauth_auth_traps,
510-
options::OPT_fno_ptrauth_auth_traps))
511-
CC1Args.push_back("-fptrauth-auth-traps");
512-
513-
if (!DriverArgs.hasArg(
514-
options::OPT_fptrauth_vtable_pointer_address_discrimination,
515-
options::OPT_fno_ptrauth_vtable_pointer_address_discrimination))
516-
CC1Args.push_back("-fptrauth-vtable-pointer-address-discrimination");
517-
518-
if (!DriverArgs.hasArg(
519-
options::OPT_fptrauth_vtable_pointer_type_discrimination,
520-
options::OPT_fno_ptrauth_vtable_pointer_type_discrimination))
521-
CC1Args.push_back("-fptrauth-vtable-pointer-type-discrimination");
522-
523-
if (!DriverArgs.hasArg(
524-
options::OPT_fptrauth_type_info_vtable_pointer_discrimination,
525-
options::OPT_fno_ptrauth_type_info_vtable_pointer_discrimination))
526-
CC1Args.push_back("-fptrauth-type-info-vtable-pointer-discrimination");
527-
528-
if (!DriverArgs.hasArg(options::OPT_fptrauth_indirect_gotos,
529-
options::OPT_fno_ptrauth_indirect_gotos))
530-
CC1Args.push_back("-fptrauth-indirect-gotos");
531-
532-
if (!DriverArgs.hasArg(options::OPT_fptrauth_init_fini,
533-
options::OPT_fno_ptrauth_init_fini))
534-
CC1Args.push_back("-fptrauth-init-fini");
535-
536-
if (!DriverArgs.hasArg(
537-
options::OPT_fptrauth_init_fini_address_discrimination,
538-
options::OPT_fno_ptrauth_init_fini_address_discrimination))
539-
CC1Args.push_back("-fptrauth-init-fini-address-discrimination");
497+
CC1Args.push_back("-fptrauth-intrinsics");
498+
CC1Args.push_back("-fptrauth-calls");
499+
CC1Args.push_back("-fptrauth-returns");
500+
CC1Args.push_back("-fptrauth-auth-traps");
501+
CC1Args.push_back("-fptrauth-vtable-pointer-address-discrimination");
502+
CC1Args.push_back("-fptrauth-vtable-pointer-type-discrimination");
503+
CC1Args.push_back("-fptrauth-type-info-vtable-pointer-discrimination");
504+
CC1Args.push_back("-fptrauth-indirect-gotos");
505+
CC1Args.push_back("-fptrauth-init-fini");
506+
CC1Args.push_back("-fptrauth-init-fini-address-discrimination");
540507

541508
if (!DriverArgs.hasArg(options::OPT_faarch64_jump_table_hardening,
542509
options::OPT_fno_aarch64_jump_table_hardening))

‎clang/test/Driver/aarch64-ptrauth.c‎

Lines changed: 46 additions & 45 deletions
Original file line numberDiff line numberDiff line change
@@ -4,7 +4,12 @@
44
// NONE: "-cc1"
55
// NONE-NOT: "-fptrauth-
66

7-
// RUN: %clang -### -c --target=aarch64 \
7+
// RUN: %clang -### -c --target=aarch64-linux \
8+
// RUN: -fno-aarch64-jump-table-hardening -faarch64-jump-table-hardening \
9+
// RUN: %s 2>&1 | FileCheck %s --check-prefix=ALL-LINUX
10+
// ALL-LINUX: "-cc1"{{.*}} "-faarch64-jump-table-hardening"
11+
12+
// RUN: %clang -### -c --target=arm64-darwin \
813
// RUN: -fno-ptrauth-intrinsics -fptrauth-intrinsics \
914
// RUN: -fno-ptrauth-calls -fptrauth-calls \
1015
// RUN: -fno-ptrauth-returns -fptrauth-returns \
@@ -13,11 +18,9 @@
1318
// RUN: -fno-ptrauth-vtable-pointer-type-discrimination -fptrauth-vtable-pointer-type-discrimination \
1419
// RUN: -fno-ptrauth-type-info-vtable-pointer-discrimination -fptrauth-type-info-vtable-pointer-discrimination \
1520
// RUN: -fno-ptrauth-indirect-gotos -fptrauth-indirect-gotos \
16-
// RUN: -fno-ptrauth-init-fini -fptrauth-init-fini \
17-
// RUN: -fno-ptrauth-init-fini-address-discrimination -fptrauth-init-fini-address-discrimination \
1821
// RUN: -fno-aarch64-jump-table-hardening -faarch64-jump-table-hardening \
19-
// RUN: %s 2>&1 | FileCheck %s --check-prefix=ALL
20-
// ALL: "-cc1"{{.*}} "-fptrauth-intrinsics" "-fptrauth-calls" "-fptrauth-returns" "-fptrauth-auth-traps" "-fptrauth-vtable-pointer-address-discrimination" "-fptrauth-vtable-pointer-type-discrimination" "-fptrauth-type-info-vtable-pointer-discrimination" "-fptrauth-indirect-gotos" "-fptrauth-init-fini" "-fptrauth-init-fini-address-discrimination" "-faarch64-jump-table-hardening"
22+
// RUN: %s 2>&1 | FileCheck %s --check-prefix=ALL-DARWIN
23+
// ALL-DARWIN: "-cc1"{{.*}} "-fptrauth-intrinsics" "-fptrauth-calls" "-fptrauth-returns" "-fptrauth-auth-traps" "-fptrauth-vtable-pointer-address-discrimination" "-fptrauth-vtable-pointer-type-discrimination" "-fptrauth-type-info-vtable-pointer-discrimination" "-fptrauth-indirect-gotos"{{.*}} "-faarch64-jump-table-hardening"
2124

2225
// RUN: %clang -### -c --target=aarch64-linux -mabi=pauthtest %s 2>&1 | FileCheck %s --check-prefix=PAUTHABI1
2326
// RUN: %clang -### -c --target=aarch64-linux-pauthtest %s 2>&1 | FileCheck %s --check-prefix=PAUTHABI1
@@ -26,36 +29,34 @@
2629
// PAUTHABI1-SAME: "-target-abi" "pauthtest"
2730
// PAUTHABI1-NOT: "-fptrauth-function-pointer-type-discrimination"
2831

29-
// RUN: %clang -### -c --target=aarch64-linux -mabi=pauthtest -fno-ptrauth-intrinsics \
30-
// RUN: -fno-ptrauth-calls -fno-ptrauth-returns -fno-ptrauth-auth-traps \
31-
// RUN: -fno-ptrauth-vtable-pointer-address-discrimination -fno-ptrauth-vtable-pointer-type-discrimination \
32-
// RUN: -fno-ptrauth-type-info-vtable-pointer-discrimination -fno-ptrauth-indirect-gotos \
33-
// RUN: -fno-ptrauth-init-fini -fno-ptrauth-init-fini-address-discrimination \
32+
// RUN: %clang -### -c --target=aarch64-linux -mabi=pauthtest \
3433
// RUN: -fno-aarch64-jump-table-hardening %s 2>&1 | FileCheck %s --check-prefix=PAUTHABI2
35-
// RUN: %clang -### -c --target=aarch64-linux-pauthtest -fno-ptrauth-intrinsics \
36-
// RUN: -fno-ptrauth-calls -fno-ptrauth-returns -fno-ptrauth-auth-traps \
37-
// RUN: -fno-ptrauth-vtable-pointer-address-discrimination -fno-ptrauth-vtable-pointer-type-discrimination \
38-
// RUN: -fno-ptrauth-type-info-vtable-pointer-discrimination -fno-ptrauth-indirect-gotos \
39-
// RUN: -fno-ptrauth-init-fini -fno-ptrauth-init-fini-address-discrimination \
34+
// RUN: %clang -### -c --target=aarch64-linux-pauthtest \
4035
// RUN: -fno-aarch64-jump-table-hardening %s 2>&1 | FileCheck %s --check-prefix=PAUTHABI2
4136

4237
//// Non-linux OS: pauthtest ABI has no effect in terms of passing ptrauth cc1 flags.
43-
//// An error about unsupported ABI will be emitted later in pipeline (see ERR2 below)
44-
// RUN: %clang -### -c --target=aarch64 -mabi=pauthtest %s 2>&1 | FileCheck %s --check-prefix=PAUTHABI2
38+
//// An error about unsupported ABI will be emitted later in pipeline (see ERR3 below)
39+
// RUN: %clang -### -c --target=aarch64 -mabi=pauthtest %s 2>&1 | FileCheck %s --check-prefixes=PAUTHABI2,PAUTHABI3
4540

4641
// PAUTHABI2: "-cc1"
4742
// PAUTHABI2-SAME: "-target-abi" "pauthtest"
48-
// PAUTHABI2-NOT: "-fptrauth-
43+
// PAUTHABI3-NOT: "-fptrauth-
4944
// PAUTHABI2-NOT: "-faarch64-jump-table-hardening"
5045

5146
//// Non-linux OS: pauthtest environment does not correspond to pauthtest ABI; aapcs is the default.
52-
// RUN: %clang -### -c --target=aarch64-pauthtest %s 2>&1 | FileCheck %s --check-prefix=PAUTHABI3
53-
// PAUTHABI3: "-cc1"
54-
// PAUTHABI3-SAME: "-target-abi" "aapcs"
55-
// PAUTHABI3-NOT: "-fptrauth-
56-
// PAUTHABI3-NOT: "-faarch64-jump-table-hardening"
57-
58-
// RUN: not %clang -### -c --target=x86_64 -fptrauth-intrinsics -fptrauth-calls -fptrauth-returns -fptrauth-auth-traps \
47+
// RUN: %clang -### -c --target=aarch64-pauthtest %s 2>&1 | FileCheck %s --check-prefix=PAUTHABI4
48+
// PAUTHABI4: "-cc1"
49+
// PAUTHABI4-SAME: "-target-abi" "aapcs"
50+
// PAUTHABI4-NOT: "-fptrauth-
51+
// PAUTHABI4-NOT: "-faarch64-jump-table-hardening"
52+
53+
//// Non-AArch64.
54+
// RUN: not %clang -### -c --target=x86_64-linux -fptrauth-intrinsics -fptrauth-calls -fptrauth-returns -fptrauth-auth-traps \
55+
// RUN: -fptrauth-vtable-pointer-address-discrimination -fptrauth-vtable-pointer-type-discrimination \
56+
// RUN: -fptrauth-type-info-vtable-pointer-discrimination -fptrauth-indirect-gotos -fptrauth-init-fini \
57+
// RUN: -fptrauth-init-fini-address-discrimination -faarch64-jump-table-hardening %s 2>&1 | FileCheck %s --check-prefixes=ERR1,ERR2
58+
//// Non-linux and non-Darwin OS.
59+
// RUN: not %clang -### -c --target=aarch64 -fptrauth-intrinsics -fptrauth-calls -fptrauth-returns -fptrauth-auth-traps \
5960
// RUN: -fptrauth-vtable-pointer-address-discrimination -fptrauth-vtable-pointer-type-discrimination \
6061
// RUN: -fptrauth-type-info-vtable-pointer-discrimination -fptrauth-indirect-gotos -fptrauth-init-fini \
6162
// RUN: -fptrauth-init-fini-address-discrimination -faarch64-jump-table-hardening %s 2>&1 | FileCheck %s --check-prefix=ERR1
@@ -69,50 +70,50 @@
6970
// ERR1-NEXT: error: unsupported option '-fptrauth-indirect-gotos' for target '{{.*}}'
7071
// ERR1-NEXT: error: unsupported option '-fptrauth-init-fini' for target '{{.*}}'
7172
// ERR1-NEXT: error: unsupported option '-fptrauth-init-fini-address-discrimination' for target '{{.*}}'
72-
// ERR1-NEXT: error: unsupported option '-faarch64-jump-table-hardening' for target '{{.*}}'
73+
// ERR2-NEXT: error: unsupported option '-faarch64-jump-table-hardening' for target '{{.*}}'
7374

7475

75-
// RUN: not %clang -c --target=aarch64 -mabi=pauthtest %s 2>&1 | FileCheck %s --check-prefix=ERR2
76+
// RUN: not %clang -c --target=aarch64 -mabi=pauthtest %s 2>&1 | FileCheck %s --check-prefix=ERR3
7677
//// The ABI is not specified explicitly, and for non-Linux pauthtest environment does not correspond
7778
//// to pauthtest ABI (each OS target defines this behavior separately). Do not emit an error.
7879
// RUN: %clang -c --target=aarch64-pauthtest %s -o /dev/null
79-
// ERR2: error: unknown target ABI 'pauthtest'
80+
// ERR3: error: unknown target ABI 'pauthtest'
8081

8182
//// PAuth ABI is encoded as environment part of the triple, so don't allow to explicitly set other environments.
82-
// RUN: not %clang -### -c --target=aarch64-linux-gnu -mabi=pauthtest %s 2>&1 | FileCheck %s --check-prefix=ERR3
83-
// ERR3: error: unsupported option '-mabi=pauthtest' for target 'aarch64-unknown-linux-gnu'
83+
// RUN: not %clang -### -c --target=aarch64-linux-gnu -mabi=pauthtest %s 2>&1 | FileCheck %s --check-prefix=ERR4
84+
// ERR4: error: unsupported option '-mabi=pauthtest' for target 'aarch64-unknown-linux-gnu'
8485
// RUN: %clang -### -c --target=aarch64-linux-pauthtest -mabi=pauthtest %s
8586

8687
//// The only branch protection option compatible with PAuthABI is BTI.
8788
// RUN: not %clang -### -c --target=aarch64-linux -mabi=pauthtest -mbranch-protection=pac-ret %s 2>&1 | \
88-
// RUN: FileCheck %s --check-prefix=ERR4
89+
// RUN: FileCheck %s --check-prefix=ERR5
8990
// RUN: not %clang -### -c --target=aarch64-linux-pauthtest -mbranch-protection=pac-ret %s 2>&1 | \
90-
// RUN: FileCheck %s --check-prefix=ERR4
91-
// ERR4: error: unsupported option '-mbranch-protection=pac-ret' for target 'aarch64-unknown-linux-pauthtest'
91+
// RUN: FileCheck %s --check-prefix=ERR5
92+
// ERR5: error: unsupported option '-mbranch-protection=pac-ret' for target 'aarch64-unknown-linux-pauthtest'
9293

9394
// RUN: not %clang -### -c --target=aarch64-linux -mabi=pauthtest -mbranch-protection=gcs %s 2>&1 | \
94-
// RUN: FileCheck %s --check-prefix=ERR5
95+
// RUN: FileCheck %s --check-prefix=ERR6
9596
// RUN: not %clang -### -c --target=aarch64-linux-pauthtest -mbranch-protection=gcs %s 2>&1 | \
96-
// RUN: FileCheck %s --check-prefix=ERR5
97-
// ERR5: error: unsupported option '-mbranch-protection=gcs' for target 'aarch64-unknown-linux-pauthtest'
97+
// RUN: FileCheck %s --check-prefix=ERR6
98+
// ERR6: error: unsupported option '-mbranch-protection=gcs' for target 'aarch64-unknown-linux-pauthtest'
9899

99100
// RUN: not %clang -### -c --target=aarch64-linux -mabi=pauthtest -mbranch-protection=standard %s 2>&1 | \
100-
// RUN: FileCheck %s --check-prefix=ERR6
101+
// RUN: FileCheck %s --check-prefix=ERR7
101102
// RUN: not %clang -### -c --target=aarch64-linux-pauthtest -mbranch-protection=standard %s 2>&1 | \
102-
// RUN: FileCheck %s --check-prefix=ERR6
103-
// ERR6: error: unsupported option '-mbranch-protection=standard' for target 'aarch64-unknown-linux-pauthtest'
103+
// RUN: FileCheck %s --check-prefix=ERR7
104+
// ERR7: error: unsupported option '-mbranch-protection=standard' for target 'aarch64-unknown-linux-pauthtest'
104105

105106
// RUN: not %clang -### -c --target=aarch64-linux -mabi=pauthtest -msign-return-address=all %s 2>&1 | \
106-
// RUN: FileCheck %s --check-prefix=ERR7
107+
// RUN: FileCheck %s --check-prefix=ERR8
107108
// RUN: not %clang -### -c --target=aarch64-linux-pauthtest -msign-return-address=all %s 2>&1 | \
108-
// RUN: FileCheck %s --check-prefix=ERR7
109-
// ERR7: error: unsupported option '-msign-return-address=all' for target 'aarch64-unknown-linux-pauthtest'
109+
// RUN: FileCheck %s --check-prefix=ERR8
110+
// ERR8: error: unsupported option '-msign-return-address=all' for target 'aarch64-unknown-linux-pauthtest'
110111

111112
// RUN: not %clang -### -c --target=aarch64-linux -mabi=pauthtest -msign-return-address=non-leaf %s 2>&1 | \
112-
// RUN: FileCheck %s --check-prefix=ERR8
113+
// RUN: FileCheck %s --check-prefix=ERR9
113114
// RUN: not %clang -### -c --target=aarch64-linux-pauthtest -msign-return-address=non-leaf %s 2>&1 | \
114-
// RUN: FileCheck %s --check-prefix=ERR8
115-
// ERR8: error: unsupported option '-msign-return-address=non-leaf' for target 'aarch64-unknown-linux-pauthtest'
115+
// RUN: FileCheck %s --check-prefix=ERR9
116+
// ERR9: error: unsupported option '-msign-return-address=non-leaf' for target 'aarch64-unknown-linux-pauthtest'
116117

117118
// RUN: %clang -### -c --target=aarch64-linux -mabi=pauthtest -msign-return-address=none %s
118119
// RUN: %clang -### -c --target=aarch64-linux-pauthtest -msign-return-address=none %s

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