@@ -0,0 +1,334 @@
+//===- nsan_allocator.cpp
-===//
+//
+// 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
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>From 6ec669e2206a29bce0c28213e82c2694f03bfad9 Mon Sep 17 00:00:00 2001
From: Fangrui Song
Date: Sun, 11 Aug 2024 13:27:34 -0700
Subject: [PATCH] remove GetCurrentThread check for NsanAllocate
Created using spr
@@ -0,0 +1,334 @@
+//===- nsan_allocator.cpp
-===//
+//
+// 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
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>From 6ec669e2206a29bce0c28213e82c2694f03bfad9 Mon Sep 17 00:00:00 2001
From: Fangrui Song
Date: Sun, 11 Aug 2024 13:27:34 -0700
Subject: [PATCH] remove GetCurrentThread check for NsanAllocate
Created using spr
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>From 6ec669e2206a29bce0c28213e82c2694f03bfad9 Mon Sep 17 00:00:00 2001
From: Fangrui Song
Date: Sun, 11 Aug 2024 13:27:34 -0700
Subject: [PATCH] remove GetCurrentThread check for NsanAllocate
Created using spr
https://github.com/MaskRay created
https://github.com/llvm/llvm-project/pull/104542
-Wa,-mapsyms=implicit enables the alternative mapping symbol scheme
discussed at #99718.
While not conforming to the current aaelf64 ABI, the option is
invaluable for those with full control over their toolchain
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The LLVM IR variable names are changed, so "NFC" probably should be removed.
There is likely no object file difference due to private linkage.
https://github.com/llvm/llvm-project/pull/104728
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This PR, if merged into 18.1, should fix
https://github.com/rust-lang/rust/issues/108835
https://github.com/llvm/llvm-project/pull/80878
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https://reviews.llvm.org/D150510 places .lrodata before .rodata to
minimize the number of permission transitions in the memory image.
However, this layout is not ideal for -fno-pic code (which is still
important).
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@@ -988,10 +991,10 @@ static unsigned getSectionRank(OutputSection &osec) {
osec.relro = true;
else
rank |= RF_NOT_RELRO;
-// Place .ldata and .lbss after .bss. Making .bss closer to .text
alleviates
-// relocation overflow pressure.
+// Place .lbss
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@@ -1124,11 +1127,15 @@ template void
Writer::setReservedSymbolSections() {
}
if (last) {
-// _edata points to the end of the last mapped initialized section.
+// _edata points to the end of the last mapped initialized section before
MaskRay wrot
@@ -1103,31 +1106,36 @@ template void
Writer::setReservedSymbolSections() {
}
PhdrEntry *last = nullptr;
- PhdrEntry *lastRO = nullptr;
-
+ OutputSection *lastRO = nullptr;
+ auto isLarge = [](OutputSection *osec) {
+return config->emachine == EM_X86_64 && osec->f
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@@ -1103,31 +1106,36 @@ template void
Writer::setReservedSymbolSections() {
}
PhdrEntry *last = nullptr;
- PhdrEntry *lastRO = nullptr;
-
+ OutputSection *lastRO = nullptr;
+ auto isLarge = [](OutputSection *osec) {
+return config->emachine == EM_X86_64 && osec->f
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MaskRay wrote:
> Why not condition this on `-no-pic`, and keep the previous more-optimal
> layout for the normal case?
The motivation is to avoid layout differences between `-no-pie` and
`-pie/-shared`. If someone uses a linker script fragment with `INSERT`, it
would be difficult if there are
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Ping:)
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MaskRay wrote:
> ISTM that making the layout conditional in order to not regress the
> most-common case (PIE) would be worth a minor amount of code in lld, even
> though the benefit is also relatively small.
>
> Do you think INSERT scripts are going to be a real-world issue there? It
> seems
MaskRay wrote:
The current layout alleviates relocation overflow pressure for `.data` and
`.bss` but not `.lrodata`. I don't think this means that we _unsupport_
`-no-pie` use cases. We just don't make `.rodata` nicer to `-no-pie` use cases.
We could, but it would be at the cost of layout puri
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MaskRay wrote:
I feel that
macOS-13 only ?! failures are unrelated
```
Failed Tests (2):
lld :: ELF/build-id.s
lld :: ELF/partition-notes.s
```
The failures are unrelated to this SystemZ patch
https://github.com/llvm/llvm-project/pull/81675
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MaskRay wrote:
> > I don't think this means that we unsupport -no-pie use cases
>
> Yes, we'd still support -no-pie, but we'd fail to support -no-pie
> -mcmodel=medium.
>
> > cost of layout purity
>
> I see that you feel strongly about this (e.g. by calling it "purity"), but I
> don't underst
MaskRay wrote:
> @MaskRay Do you have any clues as to why those tests might be failing only on
> MacOS ? I think there may have been a configuration change on the builder
> that caused it.
I have no clue... The two tests haven't been updated since 2023-09 and to the
best of my knowledge, no r
MaskRay wrote:
> @MaskRay Is it possible that this commit changed something:
> [278f80c](https://github.com/llvm/llvm-project/commit/278f80ce95401f7920845d1281aa99804a139b6c)
>
> Which parts of the object file are used to compute the build-id ?
When `--build-id` is specified, lld hashes the wh
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MaskRay wrote:
> > > > We need to calculate StackSafetyGlobalInfo before inserting
> > > > `__asan_memcpy`
> >
> >
> > Yes, but this is currently not guaranteed. This patch will ensure this
> > property and fix the issue.
>
> Then the correct way to fix this issue to avoid lazy getInfo(). It
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>From 46d21cd0327e352491be77bb86740167984c0209 Mon Sep 17 00:00:00 2001
From: Fangrui Song
Date: Wed, 14 Feb 2024 23:26:34 -0800
Subject: [PATCH] fix cl::desc
Created using spr 1.3.4
---
llvm/lib/Transforms/Ins
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@@ -1279,9 +1278,6 @@ bool AddressSanitizer::isInterestingAlloca(const
AllocaInst &AI) {
(AI.getAllocatedType()->isSized() &&
MaskRay wrote:
In `ClInstrumentUninterestingAllocas=0 mode`, `!(SSGI && SSGI->isSafe(AI))` can
ignore some `AllocaInst`s that `S
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>From 46d21cd0327e352491be77bb86740167984c0209 Mon Sep 17 00:00:00 2001
From: Fangrui Song
Date: Wed, 14 Feb 2024 23:26:34 -0800
Subject: [PATCH] fix cl::desc
Created using spr 1.3.4
---
llvm/lib/Transforms/Ins
https://github.com/MaskRay updated
https://github.com/llvm/llvm-project/pull/77221
>From 46d21cd0327e352491be77bb86740167984c0209 Mon Sep 17 00:00:00 2001
From: Fangrui Song
Date: Wed, 14 Feb 2024 23:26:34 -0800
Subject: [PATCH] fix cl::desc
Created using spr 1.3.4
---
llvm/lib/Transforms/Ins
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>From 46d21cd0327e352491be77bb86740167984c0209 Mon Sep 17 00:00:00 2001
From: Fangrui Song
Date: Wed, 14 Feb 2024 23:26:34 -0800
Subject: [PATCH 1/2] fix cl::desc
Created using spr 1.3.4
---
llvm/lib/Transforms
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@@ -1436,6 +1436,8 @@ static void readConfigs(opt::InputArgList &args) {
config->zInterpose = hasZOption(args, "interpose");
config->zKeepTextSectionPrefix = getZFlag(
args, "keep-text-section-prefix", "nokeep-text-section-prefix", false);
+ config->zLrodataAfterBss
@@ -1436,6 +1436,8 @@ static void readConfigs(opt::InputArgList &args) {
config->zInterpose = hasZOption(args, "interpose");
config->zKeepTextSectionPrefix = getZFlag(
args, "keep-text-section-prefix", "nokeep-text-section-prefix", false);
+ config->zLrodataAfterBss
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@@ -1436,6 +1436,8 @@ static void readConfigs(opt::InputArgList &args) {
config->zInterpose = hasZOption(args, "interpose");
config->zKeepTextSectionPrefix = getZFlag(
args, "keep-text-section-prefix", "nokeep-text-section-prefix", false);
+ config->zLrodataAfterBss
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Linux kernel fs/binfmt_elf_fdpic.c supports FDPIC for MMU-less systems.
GCC/binutils/qemu support FDPIC ABI for ARM
(https://github.com/mickael-guene/fdpic_doc).
_ARM FDPIC Toolchain and ABI_ provides a summary.
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`arm-linux-gnueabihf-gcc -c -fpic -mfdpic -Wa,--fdpic a.c` compiles
a.c with FDPIC codegen and assembles the assembly file with `--fdpic`.
This patch implements -Wa,--fdpic for the driver when using the
integrated
@@ -143,3 +143,10 @@ ELF_RELOC(R_ARM_THM_BF16, 0x88)
ELF_RELOC(R_ARM_THM_BF12, 0x89)
ELF_RELOC(R_ARM_THM_BF18, 0x8a)
ELF_RELOC(R_ARM_IRELATIVE, 0xa0)
+ELF_RELOC(R_ARM_GOTFUNCDESC,0xa1)
+ELF_RELOC(R_ARM_GOTOFFFUN
@@ -11358,6 +11361,37 @@ bool ARMAsmParser::parseDirectiveARM(SMLoc L) {
return false;
}
+MCSymbolRefExpr::VariantKind
+ARMAsmParser::getVariantKindForName(StringRef Name) const {
+ return StringSwitch(Name.lower())
+ .Case("funcdesc", MCSymbolRefExpr::VK_FUNCDESC)
+
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@@ -11358,6 +11361,37 @@ bool ARMAsmParser::parseDirectiveARM(SMLoc L) {
return false;
}
+MCSymbolRefExpr::VariantKind
+ARMAsmParser::getVariantKindForName(StringRef Name) const {
MaskRay wrote:
> Ideally we could refactor so that MCSymbolRefExpr::getVarian
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MaskRay wrote:
> I've checked over the implementation with binutils. Out of interest are you
> planning on implementing all of fdpic or just enough to get assembler/linker
> support working?
Yes, I plan to implement the codegen part to help me understand FDPIC better
and the codegen part of L
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@@ -1436,6 +1436,8 @@ static void readConfigs(opt::InputArgList &args) {
config->zInterpose = hasZOption(args, "interpose");
config->zKeepTextSectionPrefix = getZFlag(
args, "keep-text-section-prefix", "nokeep-text-section-prefix", false);
+ config->zLrodataAfterBss
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MaskRay wrote:
```
Merged
merged 5 commits into
[users/MaskRay/spr/main.elf-place-lbsslrodataldata-after-bss](https://github.com/llvm/llvm-project/tree/users/MaskRay/spr/main.elf-place-lbsslrodataldata-after-bss)
from
[users/MaskRay/spr/elf-place-lbsslrodataldata-after-bss](https://github.com/
MaskRay wrote:
This is fairly safe to cherry pick and it will help ClangBuiltLinux. I'm in
favor of merging it if there is still time.
https://github.com/llvm/llvm-project/pull/82324
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@@ -126,9 +126,9 @@ enum NodeType : unsigned {
// Floating point fmax and fmin matching the RISC-V instruction semantics.
FMAX, FMIN,
- // READ_CYCLE_WIDE - A read of the 64-bit cycle CSR on a 32-bit target
+ // READ_COUNTER_WIDE - A read of the 64-bit counter CSR on a 3
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MaskRay wrote:
> Thanks for the update, I'm happy with the changes. I would like to see more
> options for position independent code in embedded systems.
>
> The other related embedded position independent option for microcontrollers
> that I'm aware of is `-fropi` and `-frwpi` which is alread
https://github.com/MaskRay closed
https://github.com/llvm/llvm-project/pull/82187
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https://github.com/MaskRay approved this pull request.
https://github.com/llvm/llvm-project/pull/82688
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MaskRay wrote:
Does `/cherry-pick $commit_id` work? I think it's the preferred way to backport
a commit.
https://github.com/llvm/llvm-project/pull/82713
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LGTM since this helps at least FreeBSD. Does OpenBSD want to try llvm binary
utilities?
https://github.com/llvm/llvm-project/pull/82718
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https://github.com/llvm/llvm-project/pull/82731
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https://github.com/MaskRay created
https://github.com/llvm/llvm-project/pull/82731
None
>From 9e42ddc522436a1129ba5a5e014035ca00262cc0 Mon Sep 17 00:00:00 2001
From: Fangrui Song
Date: Thu, 22 Feb 2024 19:57:15 -0800
Subject: [PATCH] ReleaseNotes: mention -mtls-dialect=desc
---
clang/docs/Re
https://github.com/MaskRay approved this pull request.
https://github.com/llvm/llvm-project/pull/82897
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https://github.com/llvm/llvm-project/pull/83105
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MaskRay wrote:
> wants to merge 2 commits into
> [users/arichardson/spr/main.compiler-rt-allow-running-tests-without-installing-first](https://github.com/llvm/llvm-project/tree/users/arichardson/spr/main.compiler-rt-allow-running-tests-without-installing-first)
Note: since the base branch is no
https://github.com/MaskRay approved this pull request.
I have a regular clang build at /tmp/Rel. If I create a standalone compiler-rt
build at /tmp/out/crt, I see that with this PR, clang invoked by llvm-lit will
get `-resource-dir=/tmp/out/crt -Wl,-rpath,/tmp/out/crt/lib/linux`, which
utilize
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