//
// The LLVM Compiler Infrastructure
//
-// This file was developed by James M. Laskey and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/Support/DataTypes.h"
namespace llvm {
+ // DWARF encoding query type
+ namespace DwarfEncoding {
+ enum Target {
+ Data = 0,
+ CodeLabels = 1,
+ Functions = 2
+ };
+ }
+
class TargetMachine;
class CallInst;
/// Null if this target doesn't support a BSS section.
///
const char *TLSBSSSection;// Default to ".section .tbss,"awT",@nobits".
+
/// ZeroFillDirective - Directive for emitting a global to the ZeroFill
/// section on this target. Null if this target doesn't support zerofill.
const char *ZeroFillDirective; // Default is null.
- /// AddressSize - Size of addresses used in file.
- ///
- unsigned AddressSize; // Defaults to 4.
-
- /// NeedsSet - True if target asm can't compute addresses on data
- /// directives.
+ /// NonexecutableStackDirective - Directive for declaring to the
+ /// linker and beyond that the emitted code does not require stack
+ /// memory to be executable.
+ const char *NonexecutableStackDirective; // Default is null.
+
+ /// NeedsSet - True if target asm treats expressions in data directives
+ /// as linktime-relocatable. For assembly-time computation, we need to
+ /// use a .set. Thus:
+ /// .set w, x-y
+ /// .long w
+ /// is computed at assembly time, while
+ /// .long x-y
+ /// is relocated if the relative locations of x and y change at linktime.
+ /// We want both these things in different places.
bool NeedsSet; // Defaults to false.
/// MaxInstLength - This is the maximum possible length of an instruction,
/// AssemblerDialect - Which dialect of an assembler variant to use.
unsigned AssemblerDialect; // Defaults to 0
+ /// StringConstantPrefix - Prefix for FEs to use when generating unnamed
+ /// constant strings. These names get run through the Mangler later; if
+ /// you want the Mangler not to add the GlobalPrefix as well,
+ /// use '\1' as the first character.
+ const char *StringConstantPrefix; // Defaults to ".str"
+
//===--- Data Emission Directives -------------------------------------===//
/// ZeroDirective - this should be set to the directive used to get some
/// boundary.
bool AlignmentIsInBytes; // Defaults to true
+ /// TextAlignFillValue - If non-zero, this is used to fill the executable
+ /// space created as the result of a alignment directive.
+ unsigned TextAlignFillValue;
+
//===--- Section Switching Directives ---------------------------------===//
/// SwitchToSectionDirective - This is the directive used when we want to
/// global as being a weak undefined symbol.
const char *WeakRefDirective; // Defaults to null.
+ /// WeakDefDirective - This directive, if non-null, is used to declare a
+ /// global as being a weak defined symbol.
+ const char *WeakDefDirective; // Defaults to null.
+
/// HiddenDirective - This directive, if non-null, is used to declare a
/// global or function as having hidden visibility.
const char *HiddenDirective; // Defaults to "\t.hidden\t".
///
bool DwarfRequiresFrameSection; // Defaults to true.
+ /// GlobalEHDirective - This is the directive used to make exception frame
+ /// tables globally visible.
+ ///
+ const char *GlobalEHDirective; // Defaults to NULL.
+
+ /// SupportsWeakEmptyEHFrame - True if target assembler and linker will
+ /// handle a weak_definition of constant 0 for an omitted EH frame.
+ bool SupportsWeakOmittedEHFrame; // Defaults to true.
+
/// DwarfSectionOffsetDirective - Special section offset directive.
const char* DwarfSectionOffsetDirective; // Defaults to NULL
//===--- CBE Asm Translation Table -----------------------------------===//
- const char** AsmTransCBE; // Defaults to empty
+ const char *const *AsmTransCBE; // Defaults to empty
public:
TargetAsmInfo();
virtual bool ExpandInlineAsm(CallInst *CI) const {
return false;
}
+
+ /// PreferredEHDataFormat - This hook allows the target to select data
+ /// format used for encoding pointers in exception handling data. Reason is
+ /// 0 for data, 1 for code labels, 2 for function pointers. Global is true
+ /// if the symbol can be relocated.
+ virtual unsigned PreferredEHDataFormat(DwarfEncoding::Target Reason,
+ bool Global) const;
// Accessors.
//
const char *getZeroFillDirective() const {
return ZeroFillDirective;
}
- unsigned getAddressSize() const {
- return AddressSize;
+ const char *getNonexecutableStackDirective() const {
+ return NonexecutableStackDirective;
}
bool needsSet() const {
return NeedsSet;
unsigned getAssemblerDialect() const {
return AssemblerDialect;
}
+ const char *getStringConstantPrefix() const {
+ return StringConstantPrefix;
+ }
const char *getZeroDirective() const {
return ZeroDirective;
}
bool getAlignmentIsInBytes() const {
return AlignmentIsInBytes;
}
+ unsigned getTextAlignFillValue() const {
+ return TextAlignFillValue;
+ }
const char *getSwitchToSectionDirective() const {
return SwitchToSectionDirective;
}
const char *getWeakRefDirective() const {
return WeakRefDirective;
}
+ const char *getWeakDefDirective() const {
+ return WeakDefDirective;
+ }
const char *getHiddenDirective() const {
return HiddenDirective;
}
bool doesDwarfRequireFrameSection() const {
return DwarfRequiresFrameSection;
}
+ const char *getGlobalEHDirective() const {
+ return GlobalEHDirective;
+ }
+ bool getSupportsWeakOmittedEHFrame() const {
+ return SupportsWeakOmittedEHFrame;
+ }
const char *getDwarfSectionOffsetDirective() const {
return DwarfSectionOffsetDirective;
}
const char *getDwarfExceptionSection() const {
return DwarfExceptionSection;
}
- const char** getAsmCBE() const {
+ const char *const *getAsmCBE() const {
return AsmTransCBE;
}
};
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