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This is a partial revert of c66e1d6f3429. Even though that allowed us to
declare v9.2-a support without picking up SVE2 in both the backend and the
driver, the frontend itself still enabled SVE via the a
https://github.com/ahmedbougacha approved this pull request.
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https://github.com/llvm/llvm-project/pull/94056
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@@ -354,6 +354,23 @@ Given that ``signedPointer`` matches the layout for signed
pointers signed with
the given key, extract the raw pointer from it. This operation does not trap
and cannot fail, even if the pointer is not validly signed.
+``ptrauth_sign_constant``
+^
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/93904
>From 20bbad26fa9f068910baf50b5abb60a0f4557564 Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Thu, 30 May 2024 17:33:04 -0700
Subject: [PATCH 1/6] [clang] Define ptrauth_sign_constant builtin.
This is
@@ -2126,14 +2219,16 @@ static ExprResult PointerAuthSignGenericData(Sema &S,
CallExpr *Call) {
}
static ExprResult PointerAuthSignOrAuth(Sema &S, CallExpr *Call,
-PointerAuthOpKind OpKind) {
+Poi
@@ -1856,6 +1856,12 @@ class ConstantLValueEmitter : public
ConstStmtVisitor
ahmedbougacha wrote:
The more interesting question is the usage of Constant; I think we can safely
assume the integer component is always going to be a ConstantInt (because it's
goin
@@ -938,6 +938,11 @@ class CodeGenModule : public CodeGenTypeCache {
// Return the function body address of the given function.
llvm::Constant *GetFunctionStart(const ValueDecl *Decl);
+ llvm::Constant *getConstantSignedPointer(llvm::Constant *Pointer,
+
@@ -2030,8 +2030,25 @@ bool Sema::checkConstantPointerAuthKey(Expr *Arg,
unsigned &Result) {
return false;
}
+static std::pair
+findConstantBaseAndOffset(Sema &S, Expr *E) {
+ // Must evaluate as a pointer.
+ Expr::EvalResult Result;
+ if (!E->EvaluateAsRValue(Result, S.
@@ -2074,16 +2091,91 @@ static bool checkPointerAuthValue(Sema &S, Expr *&Arg,
if (convertArgumentToType(S, Arg, ExpectedTy))
return true;
- // Warn about null pointers for non-generic sign and auth operations.
- if ((OpKind == PAO_Sign || OpKind == PAO_Auth) &&
-
@@ -2074,16 +2091,91 @@ static bool checkPointerAuthValue(Sema &S, Expr *&Arg,
if (convertArgumentToType(S, Arg, ExpectedTy))
return true;
- // Warn about null pointers for non-generic sign and auth operations.
- if ((OpKind == PAO_Sign || OpKind == PAO_Auth) &&
-
@@ -0,0 +1,21 @@
+// RUN: %clang_cc1 -triple arm64-apple-ios -fptrauth-intrinsics -emit-llvm %s
-o - | FileCheck %s
+// RUN: %clang_cc1 -triple aarch64-elf -fptrauth-intrinsics -emit-llvm %s
-o - | FileCheck %s
+
+extern int external;
+
+// CHECK: @ptr1 = global ptr ptraut
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/93904
>From 20bbad26fa9f068910baf50b5abb60a0f4557564 Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Thu, 30 May 2024 17:33:04 -0700
Subject: [PATCH 1/5] [clang] Define ptrauth_sign_constant builtin.
This is
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/93904
>From 20bbad26fa9f068910baf50b5abb60a0f4557564 Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Thu, 30 May 2024 17:33:04 -0700
Subject: [PATCH 1/4] [clang] Define ptrauth_sign_constant builtin.
This is
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/94394
>From 1e9a3fde97d907c3cd6be33db91d1c18c7236ffb Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Tue, 4 Jun 2024 12:41:47 -0700
Subject: [PATCH 1/8] [Support] Reformat SipHash.cpp to match libSupport.
Wh
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/93902
>From bf413d68cff5ad963c43bb584590908bf03bc3ce Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Tue, 4 Jun 2024 12:36:33 -0700
Subject: [PATCH] [Support] Add SipHash-based 16-bit ptrauth stable hash.
Th
@@ -354,6 +354,23 @@ Given that ``signedPointer`` matches the layout for signed
pointers signed with
the given key, extract the raw pointer from it. This operation does not trap
and cannot fail, even if the pointer is not validly signed.
+``ptrauth_sign_constant``
+^
@@ -354,6 +354,23 @@ Given that ``signedPointer`` matches the layout for signed
pointers signed with
the given key, extract the raw pointer from it. This operation does not trap
and cannot fail, even if the pointer is not validly signed.
+``ptrauth_sign_constant``
+^
@@ -58,6 +58,35 @@ void test_string_discriminator(const char *str) {
}
+void test_sign_constant(int *dp, int (*fp)(int)) {
+ __builtin_ptrauth_sign_constant(&dv, VALID_DATA_KEY); // expected-error
{{too few arguments}}
+ __builtin_ptrauth_sign_constant(&dv, VALID_DATA_KEY,
@@ -2061,6 +2071,58 @@ ConstantLValueEmitter::VisitCallExpr(const CallExpr *E) {
}
}
+ConstantLValue
+ConstantLValueEmitter::emitPointerAuthSignConstant(const CallExpr *E) {
+ llvm::Constant *UnsignedPointer = emitPointerAuthPointer(E->getArg(0));
+ unsigned Key = emitPoin
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/94394
>From 1e9a3fde97d907c3cd6be33db91d1c18c7236ffb Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Tue, 4 Jun 2024 12:41:47 -0700
Subject: [PATCH 1/7] [Support] Reformat SipHash.cpp to match libSupport.
Wh
ahmedbougacha wrote:
[37c84b9](https://github.com/llvm/llvm-project/pull/94394/commits/37c84b9dce70f40db8a7c27b7de8232c4d10f78f)
shows what I had in mind, let me know what you all think. I added:
```
void getSipHash_2_4_64(const uint8_t *In, uint64_t InLen,
const uint8_t
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/94394
>From 1e9a3fde97d907c3cd6be33db91d1c18c7236ffb Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Tue, 4 Jun 2024 12:41:47 -0700
Subject: [PATCH 1/6] [Support] Reformat SipHash.cpp to match libSupport.
Wh
https://github.com/ahmedbougacha edited
https://github.com/llvm/llvm-project/pull/94394
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>From bf413d68cff5ad963c43bb584590908bf03bc3ce Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Tue, 4 Jun 2024 12:36:33 -0700
Subject: [PATCH] [Support] Add SipHash-based 16-bit ptrauth stable hash.
Th
ahmedbougacha wrote:
I think this version should work on BE hosts, but that's only by thinking
through the code. Only the bots will tell us one way or another ;)
https://github.com/llvm/llvm-project/pull/94394
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llv
@@ -1,185 +1,149 @@
-/*
- SipHash reference C implementation
-
- Copyright (c) 2012-2022 Jean-Philippe Aumasson
-
- Copyright (c) 2012-2014 Daniel J. Bernstein
-
- To the extent possible under law, the author(s) have dedicated all copyright
- and related and neighbor
@@ -1,185 +1,149 @@
-/*
- SipHash reference C implementation
-
- Copyright (c) 2012-2022 Jean-Philippe Aumasson
-
- Copyright (c) 2012-2014 Daniel J. Bernstein
-
- To the extent possible under law, the author(s) have dedicated all copyright
- and related and neighbor
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/94394
>From 1e9a3fde97d907c3cd6be33db91d1c18c7236ffb Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Tue, 4 Jun 2024 12:41:47 -0700
Subject: [PATCH 1/5] [Support] Reformat SipHash.cpp to match libSupport.
Wh
ahmedbougacha wrote:
I'll also mention that I left the original variable naming but did re-format
it, whitespace being more friendly to diffs, and this being nice and tidily
contained. If you or others have strong opinions, I'm happy to recapitalize
them.
https://github.com/llvm/llvm-project
ahmedbougacha wrote:
> Do I understand correctly that "remove big-endian support" results in this
> code not running correctly on big-endian machines? I don't recall the LLVM
> project claiming that it cannot run on big-endian machines. If I understand
> this correctly, I would not remove the
@@ -58,21 +38,15 @@
v2 = ROTL(v2, 32);
\
} while (0)
-/*
ahmedbougacha wrote:
Fair, added it back with minor tweaks; I didn't describe the template
parameters because, frankly, I'm not sure I wo
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/94394
>From 1e9a3fde97d907c3cd6be33db91d1c18c7236ffb Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Tue, 4 Jun 2024 12:41:47 -0700
Subject: [PATCH 1/4] [Support] Reformat SipHash.cpp to match libSupport.
Wh
https://github.com/ahmedbougacha edited
https://github.com/llvm/llvm-project/pull/93902
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@@ -0,0 +1,174 @@
+//===--- StableHash.cpp - An ABI-stable string hash
---===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Ap
ahmedbougacha wrote:
I split out:
- https://github.com/llvm/llvm-project/pull/94393
- https://github.com/llvm/llvm-project/pull/94394
and rebased this on top: we're now left with only the thin wrapper (the 16-bit
one only here) and the simple unittests.
https://github.com/llvm/llvm-project/pull
@@ -0,0 +1,47 @@
+//===--- SipHash.h - An ABI-stable string SipHash ---*- C++
-*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apa
https://github.com/ahmedbougacha edited
https://github.com/llvm/llvm-project/pull/93902
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https://github.com/llvm/llvm-project/pull/94394
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https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/94394
>From 1e9a3fde97d907c3cd6be33db91d1c18c7236ffb Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Tue, 4 Jun 2024 12:41:47 -0700
Subject: [PATCH 1/3] [Support] Reformat SipHash.cpp to match libSupport.
Wh
https://github.com/ahmedbougacha created
https://github.com/llvm/llvm-project/pull/94394
Start building it as part of the library, with some minor
tweaks compared to the reference implementation:
- clang-format to match libSupport
- remove tracing support
- add file header
- templatize cROUNDS/d
@@ -2126,14 +2219,16 @@ static ExprResult PointerAuthSignGenericData(Sema &S,
CallExpr *Call) {
}
static ExprResult PointerAuthSignOrAuth(Sema &S, CallExpr *Call,
-PointerAuthOpKind OpKind) {
+Poi
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/93904
>From 1a23a99f23714ba6a83b354e3b9afd056b263a02 Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Thu, 30 May 2024 17:33:04 -0700
Subject: [PATCH 1/3] [clang] Define ptrauth_sign_constant builtin.
This is
@@ -2156,6 +2156,24 @@ static ExprResult PointerAuthAuthAndResign(Sema &S,
CallExpr *Call) {
return Call;
}
+static ExprResult PointerAuthStringDiscriminator(Sema &S, CallExpr *call) {
ahmedbougacha wrote:
Clang originally had different conventions; it us
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/93903
>From 61be7a922397d66773a8f4a6e476ea321f52f00c Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Thu, 30 May 2024 17:22:29 -0700
Subject: [PATCH 1/4] [clang] Define ptrauth_string_discriminator builtin.
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/93903
>From 61be7a922397d66773a8f4a6e476ea321f52f00c Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Thu, 30 May 2024 17:22:29 -0700
Subject: [PATCH 1/3] [clang] Define ptrauth_string_discriminator builtin.
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/93904
>From 1a23a99f23714ba6a83b354e3b9afd056b263a02 Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Thu, 30 May 2024 17:33:04 -0700
Subject: [PATCH 1/2] [clang] Define ptrauth_sign_constant builtin.
This is
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/93903
>From 61be7a922397d66773a8f4a6e476ea321f52f00c Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Thu, 30 May 2024 17:22:29 -0700
Subject: [PATCH 1/2] [clang] Define ptrauth_string_discriminator builtin.
https://github.com/ahmedbougacha closed
https://github.com/llvm/llvm-project/pull/93907
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ahmedbougacha wrote:
> Why do we want a separate builtin, as opposed to just constant-folding calls
> to __builtin_ptrauth_sign?
That's a good question. Mechanically, I assumed constant-evaluating
`__builtin_ptrauth_sign_unauthenticated` would be a challenge, but looking
around it doesn't se
https://github.com/ahmedbougacha closed
https://github.com/llvm/llvm-project/pull/93984
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https://github.com/llvm/llvm-project/pull/93906
None
>From 0e85001f6d53e63beca77a76eaba1875ec84000d Mon Sep 17 00:00:00 2001
From: Akira Hatanaka
Date: Fri, 24 May 2024 20:23:36 -0700
Subject: [PATCH] [clang] Implement function pointer signing.
Co-Auth
https://github.com/ahmedbougacha created
https://github.com/llvm/llvm-project/pull/93904
This is a constant-expression equivalent to __builtin_ptrauth_sign, allowing
its usage in global initializers, but requiring constant pointers and
discriminators.
>From 1a23a99f23714ba6a83b354e3b9afd056b2
https://github.com/ahmedbougacha created
https://github.com/llvm/llvm-project/pull/93903
This exposes the ABI-stable hash function that allows computing a 16-bit
discriminator from a constant string.
This allows manually matching the implicit string discriminators computed in
the ABI (e.g., f
https://github.com/ahmedbougacha created
https://github.com/llvm/llvm-project/pull/93902
Based on the SipHash reference implementation:
https://github.com/veorq/SipHash
which has very graciously been licensed under our llvm license (Apache-2.0 WITH
LLVM-exception) by Jean-Philippe Aumasson.
@@ -1769,6 +1775,41 @@ void AArch64AsmPrinter::emitPtrauthAuthResign(const
MachineInstr *MI) {
OutStreamer->emitLabel(EndSym);
}
+void AArch64AsmPrinter::emitPtrauthBranch(const MachineInstr *MI) {
+ unsigned InstsEmitted = 0;
+
ahmedbougacha wrote:
It'
@@ -817,10 +817,44 @@ bool AArch64ExpandPseudo::expandCALL_RVMARKER(
MachineInstr &MI = *MBBI;
MachineOperand &RVTarget = MI.getOperand(0);
assert(RVTarget.isGlobal() && "invalid operand for attached call");
- MachineInstr *OriginalCall =
- createCall(MBB, MBBI, TII
ahmedbougacha wrote:
> One more overall style comment which might probably require an additional PR:
> sometimes identifiers use `PtrAuth`, sometimes `Ptrauth`. Is this
> intentional? If not, I suggest to use the same case style - it would keep
> things consistent and allow for case-sensitive
https://github.com/ahmedbougacha edited
https://github.com/llvm/llvm-project/pull/85736
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ahmedbougacha wrote:
Thanks for taking a look; updated
https://github.com/llvm/llvm-project/pull/85736
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@@ -8640,6 +8642,15 @@ void SelectionDAGBuilder::LowerCallTo(const CallBase
&CB, SDValue Callee,
CB.countOperandBundlesOfType(LLVMContext::OB_preallocated) != 0)
.setCFIType(CFIType)
.setConvergenceControlToken(ConvControlToken);
+
+ // Set the pointer a
@@ -0,0 +1,183 @@
+; RUN: llc -mtriple arm64e-apple-darwin -o - -global-isel -global-isel-abort=1
-verify-machineinstrs %s | FileCheck %s --check-prefixes=CHECK
ahmedbougacha wrote:
It's not standard practice to test other platforms, but sure, I added ELF
check
https://github.com/ahmedbougacha edited
https://github.com/llvm/llvm-project/pull/85736
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@@ -1694,6 +1718,35 @@ let Predicates = [HasPAuth] in {
def BLRABZ : AuthOneOperand<0b001, 1, "blrabz">;
}
+ // BLRA pseudo, generalized version of BLRAA/BLRAB/Z.
+ // This directly manipulates x16/x17, which are the only registers the OS
+ // guarantees are safe to
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/85736
>From 75825f36ec58a2cf5d1a3f2d4de6a49ad06c02d8 Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Mon, 27 Sep 2021 08:00:00 -0700
Subject: [PATCH 1/3] [AArch64] Adopt x8+ allocation order for GPR64noip.
7
https://github.com/ahmedbougacha updated
https://github.com/llvm/llvm-project/pull/85736
>From 75825f36ec58a2cf5d1a3f2d4de6a49ad06c02d8 Mon Sep 17 00:00:00 2001
From: Ahmed Bougacha
Date: Mon, 27 Sep 2021 08:00:00 -0700
Subject: [PATCH 1/2] [AArch64] Adopt x8+ allocation order for GPR64noip.
7
https://github.com/ahmedbougacha edited
https://github.com/llvm/llvm-project/pull/85736
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https://github.com/llvm/llvm-project/pull/85736
error: too big or took too long to generate
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ahmedbougacha wrote:
ping
https://github.com/llvm/llvm-project/pull/85736
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https://github.com/ahmedbougacha created
https://github.com/llvm/llvm-project/pull/85736
This adds codegen support for the "ptrauth" operand bundles, which can
be used to augment indirect calls with the equivalent of an
`@llvm.ptrauth.auth` intrinsic call on the call target (possibly
preceded by
https://github.com/ahmedbougacha approved this pull request.
LG, ty
https://github.com/llvm/llvm-project/pull/73685
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https://github.com/llvm/llvm-project/pull/73687
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@@ -1259,6 +1270,72 @@ struct {
// As features grows new fields could be added
} __aarch64_cpu_features __attribute__((visibility("hidden"), nocommon));
+#if defined(__APPLE__)
+#include
+#if TARGET_OS_OSX || TARGET_OS_IPHONE
+#include
+#include
+
+static bool isKnownAndS
Author: Ahmed Bougacha
Date: 2020-12-03T07:53:59-08:00
New Revision: f77c948d56b09b839262e258af5c6ad701e5b168
URL:
https://github.com/llvm/llvm-project/commit/f77c948d56b09b839262e258af5c6ad701e5b168
DIFF:
https://github.com/llvm/llvm-project/commit/f77c948d56b09b839262e258af5c6ad701e5b168.diff
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