user/llvm6: Fix ELFv2 patch, more secure PLT fixes for ppc32

3 files changed, 84 insertions, 14 deletions

diff --git a/user/llvm6/APKBUILD b/user/llvm6/APKBUILD
index f3bc9acc7..c4eb242d8 100644
--- a/user/llvm6/APKBUILD
+++ b/user/llvm6/APKBUILD
@@ -12,7 +12,7 @@ arch="all"
 options="!checkroot !dbg"
 url="https://llvm.org/"
 license="NCSA"
-depends_dev="$pkgname=$pkgver-r$pkgrel"
+depends_dev="$pkgname=$pkgver-r$pkgrel libexecinfo-dev libxml2-dev"
 makedepends="binutils-dev chrpath cmake file libexecinfo-dev libffi-dev
 	libxml2-dev python3 zlib-dev"
 subpackages="$pkgname-static $pkgname-libs $pkgname-dev
@@ -24,6 +24,7 @@ source="http://llvm.org/releases/$pkgver/llvm-$pkgver.src.tar.xz
 	disable-dlclose-test.patch
 	musl-ppc64-elfv2.patch
 	secure-plt.patch
+	more-secure-plt.patch
 	"
 builddir="$srcdir/$_pkgname-$pkgver.src"
 
@@ -245,5 +246,6 @@ f84cd65d7042e89826ba6e8d48c4c302bf4980da369d7f19a55f217e51c00ca8ed178d453df3a3ce
 6d1a716e5aa24e6b9a3acf4cc11e2504b1b01abf574074e9e5617b991de87d5e4e687eb18e85e73d5e632568afe2fc357771c4c96f9e136502071991496fb78c  cmake-fix-libLLVM-name.patch
 49c47f125014b60d0ea7870f981a2c1708ad705793f89287ed846ee881a837a4dc0170bf467e03f2ef56177473128945287749ac80dc2d13cfabcf8b929ba58a  disable-FileSystemTest.CreateDir-perms-assert.patch
 caeec8e4dbd92f5f74940780b69075f3879a267a8623822cbdc193fd14706eb089071e3a5a20d60cc2eca59e4c5b2a61d29827a2f3362ee7c5f74f11d9ace200  disable-dlclose-test.patch
-bde743960003a2a39868af9f665d86fadb0a7b1e7eb51c16ebbd74ce4c5220bbc400b1d5211c02fc2643863f49ee961e9a18dffa0eb813a0e1723613396512ab  musl-ppc64-elfv2.patch
-35d289641fa4d200b5a3f62f1d51da600a734641356b0dc6c54a3080dd89aec3b031e36af8b53be49c35346c1cbcce00268de7ec9b4f552bfd7bf84d3504d1c4  secure-plt.patch"
+e5ddbc4b6c4928e79846dc3c022eb7928aaa8fed40515c78f5f03b8ab8264f34f1eb8aa8bfc0f436450932f4917e54ad261603032092ea271d9590f11a37cf1e  musl-ppc64-elfv2.patch
+35d289641fa4d200b5a3f62f1d51da600a734641356b0dc6c54a3080dd89aec3b031e36af8b53be49c35346c1cbcce00268de7ec9b4f552bfd7bf84d3504d1c4  secure-plt.patch
+3d4a0a478bf800ea262c577451e22a1dbd5a4258226e49c66a697559263c8aa4fc0fff642a3c80ac3dfbb3efd6d9c0dbeb41dae1250fc7946de821cfef1ce1f0  more-secure-plt.patch"
diff --git a/user/llvm6/more-secure-plt.patch b/user/llvm6/more-secure-plt.patch
new file mode 100644
index 000000000..1cc08a9a8
--- /dev/null
+++ b/user/llvm6/more-secure-plt.patch
@@ -0,0 +1,38 @@
+diff --git a/lib/Target/PowerPC/PPCSubtarget.cpp b/lib/Target/PowerPC/PPCSubtarget.cpp
+index c0cbfd779cb..5d7a021c3e2 100644
+--- a/lib/Target/PowerPC/PPCSubtarget.cpp
++++ b/lib/Target/PowerPC/PPCSubtarget.cpp
+@@ -106,6 +106,7 @@
+   HasFloat128 = false;
+   IsISA3_0 = false;
+   UseLongCalls = false;
++  SecurePlt = false;
+ 
+   HasPOPCNTD = POPCNTD_Unavailable;
+ }
+@@ -136,6 +137,10 @@
+   if (isDarwin())
+     HasLazyResolverStubs = true;
+ 
++  // Set up musl-specific properties.
++  if (TargetTriple.getEnvironment() == Triple::Musl)
++    SecurePlt = true;
++
+   // QPX requires a 32-byte aligned stack. Note that we need to do this if
+   // we're compiling for a BG/Q system regardless of whether or not QPX
+   // is enabled because external functions will assume this alignment.
+diff --git a/lib/Target/PowerPC/PPCTargetMachine.cpp b/lib/Target/PowerPC/PPCTargetMachine.cpp
+index c583fba8cab..6a9eedf89c5 100644
+--- a/lib/Target/PowerPC/PPCTargetMachine.cpp
++++ b/lib/Target/PowerPC/PPCTargetMachine.cpp
+@@ -222,6 +222,10 @@ static Reloc::Model getEffectiveRelocModel(const Triple &TT,
+   if (TT.getArch() == Triple::ppc64 || TT.getArch() == Triple::ppc64le)
+     return Reloc::PIC_;
+ 
++  // musl needs SecurePlt, which depends on PIC.
++  if (TT.getEnvironment() == Triple::Musl)
++    return Reloc::PIC_;
++
+   // 32-bit is static by default.
+   return Reloc::Static;
+ }
diff --git a/user/llvm6/musl-ppc64-elfv2.patch b/user/llvm6/musl-ppc64-elfv2.patch
index 6fa65526b..016be5dad 100644
--- a/user/llvm6/musl-ppc64-elfv2.patch
+++ b/user/llvm6/musl-ppc64-elfv2.patch
@@ -1,13 +1,43 @@
---- llvm-6.0.1.src/lib/Target/PowerPC/PPCTargetMachine.cpp.orig	2018-09-13 03:51:11.900000000 +0000
-+++ llvm-6.0.1.src/lib/Target/PowerPC/PPCTargetMachine.cpp	2018-09-13 03:56:10.740000000 +0000
-@@ -191,6 +191,10 @@
-   if (TT.isMacOSX())
-     return PPCTargetMachine::PPC_ABI_UNKNOWN;
- 
-+  // musl uses ELFv2 ABI on both endians.
-+  if (TT.getEnvironment() == Triple::Musl)
-+    return PPCTargetMachine::PPC_ABI_ELFv2;
-+
-   switch (TT.getArch()) {
+From 750d323a6060ad92c3d247f85d6555041f55b4a5 Mon Sep 17 00:00:00 2001
+From: "A. Wilcox" <AWilcox@Wilcox-Tech.com>
+Date: Thu, 4 Oct 2018 15:26:59 -0500
+Subject: [PATCH] Add support for powerpc64-*-linux-musl targets
+
+This patch ensures that 64-bit PowerPC musl targets use ELFv2 ABI on both
+endians.  It additionally adds a test that big endian PPC64 uses ELFv2 on
+musl.
+---
+ lib/Target/PowerPC/PPCTargetMachine.cpp | 4 ++++
+ test/CodeGen/PowerPC/ppc64-elf-abi.ll   | 1 +
+ 2 files changed, 5 insertions(+)
+
+diff --git a/lib/Target/PowerPC/PPCTargetMachine.cpp b/lib/Target/PowerPC/PPCTargetMachine.cpp
+index 34410393ef6..c583fba8cab 100644
+--- a/lib/Target/PowerPC/PPCTargetMachine.cpp
++++ b/lib/Target/PowerPC/PPCTargetMachine.cpp
+@@ -199,6 +199,10 @@ static PPCTargetMachine::PPCABI computeTargetABI(const Triple &TT,
    case Triple::ppc64le:
      return PPCTargetMachine::PPC_ABI_ELFv2;
+   case Triple::ppc64:
++    // musl uses ELFv2 ABI on both endians.
++    if (TT.getEnvironment() == Triple::Musl)
++      return PPCTargetMachine::PPC_ABI_ELFv2;
++
+     return PPCTargetMachine::PPC_ABI_ELFv1;
+   default:
+     return PPCTargetMachine::PPC_ABI_UNKNOWN;
+diff --git a/test/CodeGen/PowerPC/ppc64-elf-abi.ll b/test/CodeGen/PowerPC/ppc64-elf-abi.ll
+index 1e17930304b..aa594b37b47 100644
+--- a/test/CodeGen/PowerPC/ppc64-elf-abi.ll
++++ b/test/CodeGen/PowerPC/ppc64-elf-abi.ll
+@@ -1,6 +1,7 @@
+ ; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu < %s | FileCheck %s -check-prefix=CHECK-ELFv1
+ ; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -target-abi elfv1 < %s | FileCheck %s -check-prefix=CHECK-ELFv1
+ ; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -target-abi elfv2 < %s | FileCheck %s -check-prefix=CHECK-ELFv2
++; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-musl < %s | FileCheck %s -check-prefix=CHECK-ELFv2
+ ; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s -check-prefix=CHECK-ELFv2
+ ; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -target-abi elfv1 < %s | FileCheck %s -check-prefix=CHECK-ELFv1
+ ; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -target-abi elfv2 < %s | FileCheck %s -check-prefix=CHECK-ELFv2
+-- 
+2.18.0
+