Add AsmPrinter support for emitting a directive to declare that
the code being generated does not require an executable stack.
Also, add target-specific code to make use of this on Linux
on x86.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50634 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86TargetAsmInfo.cpp b/lib/Target/X86/X86TargetAsmInfo.cpp
index 7636d77..4aa9d4c 100644
--- a/lib/Target/X86/X86TargetAsmInfo.cpp
+++ b/lib/Target/X86/X86TargetAsmInfo.cpp
@@ -128,6 +128,7 @@
break;
case X86Subtarget::isELF:
+ case X86Subtarget::isELFLinux:
ReadOnlySection = "\t.section\t.rodata";
FourByteConstantSection = "\t.section\t.rodata.cst4,\"aM\",@progbits,4";
EightByteConstantSection = "\t.section\t.rodata.cst8,\"aM\",@progbits,8";
@@ -229,6 +230,10 @@
SectionEndDirectiveSuffix = "\tends\n";
}
+ // On Linux we must declare when we can use a non-executable stack.
+ if (Subtarget->isTargetLinux())
+ NonexecutableStackDirective = "\t.section\t.note.GNU-stack,\"\",@progbits";
+
AssemblerDialect = Subtarget->getAsmFlavor();
}