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llvm: Include aarch64 patch in repo

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This commit is contained in:
Tuomas Tynkkynen 2017-11-29 17:01:17 +02:00
parent 99bab78abd
commit fc26ff04b2
3 changed files with 53 additions and 12 deletions
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7
pkgs/development/compilers/llvm/4/llvm.nix
View File

@ -24,11 +24,6 @@
let
src = fetch "llvm" "0l9bf7kdwhlj0kq1hawpyxhna1062z3h7qcz2y8nfl9dz2qksy6s";
aarch64Patch = fetchpatch {
url = https://reviews.llvm.org/file/data/2oqw5rhhklsapbjrhlpd/PHID-FILE-lvo4fcs6hjvkxb5wneg2/D40423.diff;
sha256 = "0b0h7n7lxw33pn2j061hm9050zn263gmiig937g5cmcvjimxlybb";
};
# Used when creating a version-suffixed symlink of libLLVM.dylib
shortVersion = with stdenv.lib;
concatStringsSep "." (take 2 (splitString "." release_version));
@ -87,7 +82,7 @@ in stdenv.mkDerivation rec {
--replace 'struct sigaltstack' 'stack_t'
)
'' + stdenv.lib.optionalString stdenv.isAarch64 ''
patch -p0 < ${aarch64Patch}
patch -p0 < ${../aarch64.patch}
'';
# hacky fix: created binaries need to be run before installation

7
pkgs/development/compilers/llvm/5/llvm.nix
View File

@ -24,11 +24,6 @@
let
src = fetch "llvm" "1nin64vz21hyng6jr19knxipvggaqlkl2l9jpd5czbc4c2pcnpg3";
aarch64Patch = fetchpatch {
url = https://reviews.llvm.org/file/data/2oqw5rhhklsapbjrhlpd/PHID-FILE-lvo4fcs6hjvkxb5wneg2/D40423.diff;
sha256 = "0b0h7n7lxw33pn2j061hm9050zn263gmiig937g5cmcvjimxlybb";
};
# Used when creating a version-suffixed symlink of libLLVM.dylib
shortVersion = with stdenv.lib;
concatStringsSep "." (take 2 (splitString "." release_version));
@ -81,7 +76,7 @@ in stdenv.mkDerivation rec {
# Revert compiler-rt commit that makes codesign mandatory
patch -p1 -i ${./compiler-rt-codesign.patch} -d projects/compiler-rt
'' + stdenv.lib.optionalString stdenv.isAarch64 ''
patch -p0 < ${aarch64Patch}
patch -p0 < ${../aarch64.patch}
'';
# hacky fix: created binaries need to be run before installation

51
pkgs/development/compilers/llvm/aarch64.patch Normal file
View File

@ -0,0 +1,51 @@
--- lib/Support/Unix/Memory.inc
+++ lib/Support/Unix/Memory.inc
@@ -126,8 +126,12 @@
Result.Address = Addr;
Result.Size = NumPages*PageSize;
- if (PFlags & MF_EXEC)
- Memory::InvalidateInstructionCache(Result.Address, Result.Size);
+ // Rely on protectMappedMemory to invalidate instruction cache.
+ if (PFlags & MF_EXEC) {
+ EC = Memory::protectMappedMemory (Result, PFlags);
+ if (EC != std::error_code())
+ return MemoryBlock();
+ }
return Result;
}
@@ -156,15 +160,31 @@
return std::error_code(EINVAL, std::generic_category());
int Protect = getPosixProtectionFlags(Flags);
-
uintptr_t Start = alignAddr((uint8_t *)M.Address - PageSize + 1, PageSize);
uintptr_t End = alignAddr((uint8_t *)M.Address + M.Size, PageSize);
+
+ bool InvalidateCache = (Flags & MF_EXEC);
+
+#if defined(__arm__) || defined(__aarch64__)
+ // Certain ARM implementations treat icache clear instruction as a memory read,
+ // and CPU segfaults on trying to clear cache on !PROT_READ page. Therefore we need
+ // to temporarily add PROT_READ for the sake of flushing the instruction caches.
+ if (InvalidateCache && !(Protect & PROT_READ)) {
+ int Result = ::mprotect((void *)Start, End - Start, Protect | PROT_READ);
+ if (Result != 0)
+ return std::error_code(errno, std::generic_category());
+
+ Memory::InvalidateInstructionCache(M.Address, M.Size);
+ InvalidateCache = false;
+ }
+#endif
+
int Result = ::mprotect((void *)Start, End - Start, Protect);
if (Result != 0)
return std::error_code(errno, std::generic_category());
- if (Flags & MF_EXEC)
+ if (InvalidateCache)
Memory::InvalidateInstructionCache(M.Address, M.Size);
return std::error_code();