[llvm] r303655 - [RuntimeDyld, PowerPC] Fix regression from r303637
Ulrich Weigand via llvm-commits
llvm-commits at lists.llvm.org
Tue May 23 10:03:23 PDT 2017
Author: uweigand
Date: Tue May 23 12:03:23 2017
New Revision: 303655
URL: http://llvm.org/viewvc/llvm-project?rev=303655&view=rev
Log:
[RuntimeDyld, PowerPC] Fix regression from r303637
Actually, to identify external symbols, we need to check for
*either* non-null Value.SymbolName *or* a SymType of
Symbol::ST_Unknown.
The former may happen for symbols not known to the JIT at all
(e.g. defined in a native library), while the latter happens
for symbols known to the JIT, but defined in a different module.
Fixed several regressions on big-endian ppc64.
Modified:
llvm/trunk/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
Modified: llvm/trunk/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp?rev=303655&r1=303654&r2=303655&view=diff
==============================================================================
--- llvm/trunk/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp (original)
+++ llvm/trunk/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp Tue May 23 12:03:23 2017
@@ -1324,12 +1324,13 @@ RuntimeDyldELF::processRelocationRef(
Obj.getPlatformFlags(AbiVariant);
AbiVariant &= ELF::EF_PPC64_ABI;
// A PPC branch relocation will need a stub function if the target is
- // an external symbol (Value.SymbolName set) or if the target address
- // is not within the signed 24-bits branch address.
+ // an external symbol (either Value.SymbolName is set, or SymType is
+ // Symbol::ST_Unknown) or if the target address is not within the
+ // signed 24-bits branch address.
SectionEntry &Section = Sections[SectionID];
uint8_t *Target = Section.getAddressWithOffset(Offset);
bool RangeOverflow = false;
- if (!Value.SymbolName) {
+ if (!Value.SymbolName && SymType != SymbolRef::ST_Unknown) {
if (AbiVariant != 2) {
// In the ELFv1 ABI, a function call may point to the .opd entry,
// so the final symbol value is calculated based on the relocation
@@ -1353,9 +1354,10 @@ RuntimeDyldELF::processRelocationRef(
RangeOverflow = true;
}
}
- if (Value.SymbolName || RangeOverflow) {
- // It is an external symbol (SymbolRef::ST_Unknown) or within a range
- // larger than 24-bits.
+ if (Value.SymbolName || SymType == SymbolRef::ST_Unknown ||
+ RangeOverflow) {
+ // It is an external symbol (either Value.SymbolName is set, or
+ // SymType is SymbolRef::ST_Unknown) or out of range.
StubMap::const_iterator i = Stubs.find(Value);
if (i != Stubs.end()) {
// Symbol function stub already created, just relocate to it
@@ -1409,7 +1411,7 @@ RuntimeDyldELF::processRelocationRef(
RelType, 0);
Section.advanceStubOffset(getMaxStubSize());
}
- if (Value.SymbolName) {
+ if (Value.SymbolName || SymType == SymbolRef::ST_Unknown) {
// Restore the TOC for external calls
if (AbiVariant == 2)
writeInt32BE(Target + 4, 0xE8410018); // ld r2,28(r1)
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