mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-21 18:29:46 +00:00
The underlying type of all plain enums in MSVC is 'int', even if the enumerator contains large 32-bit unsigned values or values greater than UINT_MAX. The only way to get a large or unsigned enum type is to request it explicitly with the C++11 strong enum types feature. However, since LLVM isn't C++11 yet, I had to add a conditional LLVM_ENUM_INT_TYPE to Compiler.h to control its usage. The motivating true positive for this change is compiling PointerIntPair with MSVC for win64. The PointerIntMask value is supposed to be pointer sized value of all ones with some low zeros. Instead, it's truncated to 32-bits! We are only saved later because it is sign extended back in the AND with int64_t, and we happen to want all ones. This silences lots of -Wmicrosoft warnings during a clang self-host targeting Windows. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191241 91177308-0d34-0410-b5e6-96231b3b80d8
191 lines
7.7 KiB
C++
191 lines
7.7 KiB
C++
//===- MCSectionMachO.h - MachO Machine Code Sections -----------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file declares the MCSectionMachO class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_MC_MCSECTIONMACHO_H
|
|
#define LLVM_MC_MCSECTIONMACHO_H
|
|
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/MC/MCSection.h"
|
|
|
|
namespace llvm {
|
|
|
|
/// MCSectionMachO - This represents a section on a Mach-O system (used by
|
|
/// Mac OS X). On a Mac system, these are also described in
|
|
/// /usr/include/mach-o/loader.h.
|
|
class MCSectionMachO : public MCSection {
|
|
char SegmentName[16]; // Not necessarily null terminated!
|
|
char SectionName[16]; // Not necessarily null terminated!
|
|
|
|
/// TypeAndAttributes - This is the SECTION_TYPE and SECTION_ATTRIBUTES
|
|
/// field of a section, drawn from the enums below.
|
|
unsigned TypeAndAttributes;
|
|
|
|
/// Reserved2 - The 'reserved2' field of a section, used to represent the
|
|
/// size of stubs, for example.
|
|
unsigned Reserved2;
|
|
|
|
MCSectionMachO(StringRef Segment, StringRef Section,
|
|
unsigned TAA, unsigned reserved2, SectionKind K);
|
|
friend class MCContext;
|
|
public:
|
|
|
|
/// These are the section type and attributes fields. A MachO section can
|
|
/// have only one Type, but can have any of the attributes specified.
|
|
enum LLVM_ENUM_INT_TYPE(uint32_t) {
|
|
// TypeAndAttributes bitmasks.
|
|
SECTION_TYPE = 0x000000FFU,
|
|
SECTION_ATTRIBUTES = 0xFFFFFF00U,
|
|
|
|
// Valid section types.
|
|
|
|
/// S_REGULAR - Regular section.
|
|
S_REGULAR = 0x00U,
|
|
/// S_ZEROFILL - Zero fill on demand section.
|
|
S_ZEROFILL = 0x01U,
|
|
/// S_CSTRING_LITERALS - Section with literal C strings.
|
|
S_CSTRING_LITERALS = 0x02U,
|
|
/// S_4BYTE_LITERALS - Section with 4 byte literals.
|
|
S_4BYTE_LITERALS = 0x03U,
|
|
/// S_8BYTE_LITERALS - Section with 8 byte literals.
|
|
S_8BYTE_LITERALS = 0x04U,
|
|
/// S_LITERAL_POINTERS - Section with pointers to literals.
|
|
S_LITERAL_POINTERS = 0x05U,
|
|
/// S_NON_LAZY_SYMBOL_POINTERS - Section with non-lazy symbol pointers.
|
|
S_NON_LAZY_SYMBOL_POINTERS = 0x06U,
|
|
/// S_LAZY_SYMBOL_POINTERS - Section with lazy symbol pointers.
|
|
S_LAZY_SYMBOL_POINTERS = 0x07U,
|
|
/// S_SYMBOL_STUBS - Section with symbol stubs, byte size of stub in
|
|
/// the Reserved2 field.
|
|
S_SYMBOL_STUBS = 0x08U,
|
|
/// S_MOD_INIT_FUNC_POINTERS - Section with only function pointers for
|
|
/// initialization.
|
|
S_MOD_INIT_FUNC_POINTERS = 0x09U,
|
|
/// S_MOD_TERM_FUNC_POINTERS - Section with only function pointers for
|
|
/// termination.
|
|
S_MOD_TERM_FUNC_POINTERS = 0x0AU,
|
|
/// S_COALESCED - Section contains symbols that are to be coalesced.
|
|
S_COALESCED = 0x0BU,
|
|
/// S_GB_ZEROFILL - Zero fill on demand section (that can be larger than 4
|
|
/// gigabytes).
|
|
S_GB_ZEROFILL = 0x0CU,
|
|
/// S_INTERPOSING - Section with only pairs of function pointers for
|
|
/// interposing.
|
|
S_INTERPOSING = 0x0DU,
|
|
/// S_16BYTE_LITERALS - Section with only 16 byte literals.
|
|
S_16BYTE_LITERALS = 0x0EU,
|
|
/// S_DTRACE_DOF - Section contains DTrace Object Format.
|
|
S_DTRACE_DOF = 0x0FU,
|
|
/// S_LAZY_DYLIB_SYMBOL_POINTERS - Section with lazy symbol pointers to
|
|
/// lazy loaded dylibs.
|
|
S_LAZY_DYLIB_SYMBOL_POINTERS = 0x10U,
|
|
/// S_THREAD_LOCAL_REGULAR - Section with ....
|
|
S_THREAD_LOCAL_REGULAR = 0x11U,
|
|
/// S_THREAD_LOCAL_ZEROFILL - Thread local zerofill section.
|
|
S_THREAD_LOCAL_ZEROFILL = 0x12U,
|
|
/// S_THREAD_LOCAL_VARIABLES - Section with thread local variable structure
|
|
/// data.
|
|
S_THREAD_LOCAL_VARIABLES = 0x13U,
|
|
/// S_THREAD_LOCAL_VARIABLE_POINTERS - Section with ....
|
|
S_THREAD_LOCAL_VARIABLE_POINTERS = 0x14U,
|
|
/// S_THREAD_LOCAL_INIT_FUNCTION_POINTERS - Section with thread local
|
|
/// variable initialization pointers to functions.
|
|
S_THREAD_LOCAL_INIT_FUNCTION_POINTERS = 0x15U,
|
|
|
|
LAST_KNOWN_SECTION_TYPE = S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
|
|
|
|
|
|
// Valid section attributes.
|
|
|
|
/// S_ATTR_PURE_INSTRUCTIONS - Section contains only true machine
|
|
/// instructions.
|
|
S_ATTR_PURE_INSTRUCTIONS = 1U << 31,
|
|
/// S_ATTR_NO_TOC - Section contains coalesced symbols that are not to be
|
|
/// in a ranlib table of contents.
|
|
S_ATTR_NO_TOC = 1U << 30,
|
|
/// S_ATTR_STRIP_STATIC_SYMS - Ok to strip static symbols in this section
|
|
/// in files with the MY_DYLDLINK flag.
|
|
S_ATTR_STRIP_STATIC_SYMS = 1U << 29,
|
|
/// S_ATTR_NO_DEAD_STRIP - No dead stripping.
|
|
S_ATTR_NO_DEAD_STRIP = 1U << 28,
|
|
/// S_ATTR_LIVE_SUPPORT - Blocks are live if they reference live blocks.
|
|
S_ATTR_LIVE_SUPPORT = 1U << 27,
|
|
/// S_ATTR_SELF_MODIFYING_CODE - Used with i386 code stubs written on by
|
|
/// dyld.
|
|
S_ATTR_SELF_MODIFYING_CODE = 1U << 26,
|
|
/// S_ATTR_DEBUG - A debug section.
|
|
S_ATTR_DEBUG = 1U << 25,
|
|
/// S_ATTR_SOME_INSTRUCTIONS - Section contains some machine instructions.
|
|
S_ATTR_SOME_INSTRUCTIONS = 1U << 10,
|
|
/// S_ATTR_EXT_RELOC - Section has external relocation entries.
|
|
S_ATTR_EXT_RELOC = 1U << 9,
|
|
/// S_ATTR_LOC_RELOC - Section has local relocation entries.
|
|
S_ATTR_LOC_RELOC = 1U << 8
|
|
};
|
|
|
|
StringRef getSegmentName() const {
|
|
// SegmentName is not necessarily null terminated!
|
|
if (SegmentName[15])
|
|
return StringRef(SegmentName, 16);
|
|
return StringRef(SegmentName);
|
|
}
|
|
StringRef getSectionName() const {
|
|
// SectionName is not necessarily null terminated!
|
|
if (SectionName[15])
|
|
return StringRef(SectionName, 16);
|
|
return StringRef(SectionName);
|
|
}
|
|
|
|
virtual std::string getLabelBeginName() const {
|
|
return StringRef(getSegmentName().str() + getSectionName().str() + "_begin");
|
|
}
|
|
|
|
virtual std::string getLabelEndName() const {
|
|
return StringRef(getSegmentName().str() + getSectionName().str() + "_end");
|
|
}
|
|
|
|
unsigned getTypeAndAttributes() const { return TypeAndAttributes; }
|
|
unsigned getStubSize() const { return Reserved2; }
|
|
|
|
unsigned getType() const { return TypeAndAttributes & SECTION_TYPE; }
|
|
bool hasAttribute(unsigned Value) const {
|
|
return (TypeAndAttributes & Value) != 0;
|
|
}
|
|
|
|
/// ParseSectionSpecifier - Parse the section specifier indicated by "Spec".
|
|
/// This is a string that can appear after a .section directive in a mach-o
|
|
/// flavored .s file. If successful, this fills in the specified Out
|
|
/// parameters and returns an empty string. When an invalid section
|
|
/// specifier is present, this returns a string indicating the problem.
|
|
/// If no TAA was parsed, TAA is not altered, and TAAWasSet becomes false.
|
|
static std::string ParseSectionSpecifier(StringRef Spec, // In.
|
|
StringRef &Segment, // Out.
|
|
StringRef &Section, // Out.
|
|
unsigned &TAA, // Out.
|
|
bool &TAAParsed, // Out.
|
|
unsigned &StubSize); // Out.
|
|
|
|
virtual void PrintSwitchToSection(const MCAsmInfo &MAI,
|
|
raw_ostream &OS,
|
|
const MCExpr *Subsection) const;
|
|
virtual bool UseCodeAlign() const;
|
|
virtual bool isVirtualSection() const;
|
|
|
|
static bool classof(const MCSection *S) {
|
|
return S->getVariant() == SV_MachO;
|
|
}
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|