1 //===-- ARMMCAsmInfo.cpp - ARM asm properties -----------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains the declarations of the ARMMCAsmInfo properties.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "ARMMCAsmInfo.h"
15 #include "llvm/Support/CommandLine.h"
16 
17 using namespace llvm;
18 
19 // ARM EHABI is experimental but the quality is good enough
20 // to be turned on by default on non-Darwin ARM targets.
21 cl::opt<bool>
22 DisableARMEHABI("arm-disable-ehabi", cl::Hidden,
23   cl::desc("Disable ARM experimental exception handling"),
24   cl::init(false));
25 
26 
27 void ARMMCAsmInfoDarwin::anchor() { }
28 
29 ARMMCAsmInfoDarwin::ARMMCAsmInfoDarwin() {
30   Data64bitsDirective = 0;
31   CommentString = "@";
32   Code16Directive = ".code\t16";
33   Code32Directive = ".code\t32";
34   UseDataRegionDirectives = true;
35 
36   SupportsDebugInformation = true;
37 
38   // Exceptions handling
39   ExceptionsType = ExceptionHandling::SjLj;
40 }
41 
42 void ARMELFMCAsmInfo::anchor() { }
43 
44 ARMELFMCAsmInfo::ARMELFMCAsmInfo() {
45   // ".comm align is in bytes but .align is pow-2."
46   AlignmentIsInBytes = false;
47 
48   Data64bitsDirective = 0;
49   CommentString = "@";
50   Code16Directive = ".code\t16";
51   Code32Directive = ".code\t32";
52 
53   HasLEB128 = true;
54   SupportsDebugInformation = true;
55 
56   // Exceptions handling
57   if (!DisableARMEHABI)
58     ExceptionsType = ExceptionHandling::ARM;
59 
60   // foo(plt) instead of foo@plt
61   UseParensForSymbolVariant = true;
62 }
63