From 0fb34683b9e33238288d2af1e090582464df8387 Mon Sep 17 00:00:00 2001 From: Bob Wilson Date: Wed, 30 Sep 2009 00:23:42 +0000 Subject: [PATCH] For Darwin, emit all the text section directives together before the dwarf section directives. This causes the assembler to put the text sections at the beginning of the object file, which helps work around a limitation of the Darwin ARM relocations. Radar 7255355. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83127 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp index df349e33b47..6fc47ef7799 100644 --- a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp +++ b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp @@ -1046,6 +1046,25 @@ void ARMAsmPrinter::printMachineInstruction(const MachineInstr *MI) { bool ARMAsmPrinter::doInitialization(Module &M) { + if (Subtarget->isTargetDarwin()) { + Reloc::Model RelocM = TM.getRelocationModel(); + if (RelocM == Reloc::PIC_ || RelocM == Reloc::DynamicNoPIC) { + // Declare all the text sections up front (before the DWARF sections + // emitted by AsmPrinter::doInitialization) so the assembler will keep + // them together at the beginning of the object file. This helps + // avoid out-of-range branches that are due a fundamental limitation of + // the way symbol offsets are encoded with the current Darwin ARM + // relocations. + O << "\t.section __TEXT,__text,regular\n" + << "\t.section __TEXT,__textcoal_nt,coalesced\n" + << "\t.section __TEXT,__const_coal,coalesced\n"; + if (RelocM == Reloc::DynamicNoPIC) + O << "\t.section __TEXT,__symbol_stub4,symbol_stubs,none,12\n"; + else + O << "\t.section __TEXT,__picsymbolstub4,symbol_stubs,none,16\n"; + } + } + bool Result = AsmPrinter::doInitialization(M); DW = getAnalysisIfAvailable(); -- 2.11.0