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Diffstat (limited to 'lib/MC/MCAssembler.cpp')
-rw-r--r--lib/MC/MCAssembler.cpp161
1 files changed, 30 insertions, 131 deletions
diff --git a/lib/MC/MCAssembler.cpp b/lib/MC/MCAssembler.cpp
index ad42364dff..ae8ca4bf7e 100644
--- a/lib/MC/MCAssembler.cpp
+++ b/lib/MC/MCAssembler.cpp
@@ -11,6 +11,7 @@
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCAsmLayout.h"
#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCValue.h"
@@ -42,10 +43,6 @@ STATISTIC(EmittedFragments, "Number of emitted assembler fragments");
// object file, which may truncate it. We should detect that truncation where
// invalid and report errors back.
-class MCObjectWriter;
-static void WriteFileData(raw_ostream &OS, const MCSectionData &SD,
- MCObjectWriter *MOW);
-
/// isVirtualSection - Check if this is a section which does not actually exist
/// in the object file.
static bool isVirtualSection(const MCSection &Section) {
@@ -78,105 +75,6 @@ static bool isFixupKindPCRel(unsigned Kind) {
}
}
-class MCObjectWriter {
- MCObjectWriter(const MCObjectWriter &); // DO NOT IMPLEMENT
- void operator=(const MCObjectWriter &); // DO NOT IMPLEMENT
-
-protected:
- raw_ostream &OS;
-
- unsigned IsLittleEndian : 1;
-
-protected: // Can only create subclasses.
- MCObjectWriter(raw_ostream &_OS, bool _IsLittleEndian)
- : OS(_OS), IsLittleEndian(_IsLittleEndian) {}
- virtual ~MCObjectWriter();
-
-public:
-
- bool isLittleEndian() { return IsLittleEndian; }
-
- raw_ostream &getStream() { return OS; }
-
- /// @name Binary Output Methods
- /// @{
-
- void Write8(uint8_t Value) {
- OS << char(Value);
- }
-
- void WriteLE16(uint16_t Value) {
- Write8(uint8_t(Value >> 0));
- Write8(uint8_t(Value >> 8));
- }
-
- void WriteLE32(uint32_t Value) {
- WriteLE16(uint16_t(Value >> 0));
- WriteLE16(uint16_t(Value >> 16));
- }
-
- void WriteLE64(uint64_t Value) {
- WriteLE32(uint32_t(Value >> 0));
- WriteLE32(uint32_t(Value >> 32));
- }
-
- void WriteBE16(uint16_t Value) {
- Write8(uint8_t(Value >> 8));
- Write8(uint8_t(Value >> 0));
- }
-
- void WriteBE32(uint32_t Value) {
- WriteBE16(uint16_t(Value >> 16));
- WriteBE16(uint16_t(Value >> 0));
- }
-
- void WriteBE64(uint64_t Value) {
- WriteBE32(uint32_t(Value >> 32));
- WriteBE32(uint32_t(Value >> 0));
- }
-
- void Write16(uint16_t Value) {
- if (IsLittleEndian)
- WriteLE16(Value);
- else
- WriteBE16(Value);
- }
-
- void Write32(uint32_t Value) {
- if (IsLittleEndian)
- WriteLE32(Value);
- else
- WriteBE32(Value);
- }
-
- void Write64(uint64_t Value) {
- if (IsLittleEndian)
- WriteLE64(Value);
- else
- WriteBE64(Value);
- }
-
- void WriteZeros(unsigned N) {
- const char Zeros[16] = { 0 };
-
- for (unsigned i = 0, e = N / 16; i != e; ++i)
- OS << StringRef(Zeros, 16);
-
- OS << StringRef(Zeros, N % 16);
- }
-
- void WriteBytes(StringRef Str, unsigned ZeroFillSize = 0) {
- OS << Str;
- if (ZeroFillSize)
- WriteZeros(ZeroFillSize - Str.size());
- }
-
- /// @}
-};
-
-MCObjectWriter::~MCObjectWriter() {
-}
-
class MachObjectWriter : public MCObjectWriter {
// See <mach-o/loader.h>.
enum {
@@ -362,8 +260,9 @@ public:
assert(OS.tell() - Start == SegmentLoadCommandSize);
}
- void WriteSection(const MCSectionData &SD, uint64_t FileOffset,
- uint64_t RelocationsStart, unsigned NumRelocations) {
+ void WriteSection(const MCAssembler &Asm, const MCSectionData &SD,
+ uint64_t FileOffset, uint64_t RelocationsStart,
+ unsigned NumRelocations) {
// The offset is unused for virtual sections.
if (isVirtualSection(SD.getSection())) {
assert(SD.getFileSize() == 0 && "Invalid file size!");
@@ -527,7 +426,8 @@ public:
Write32(Address);
}
- void RecordScatteredRelocation(MCAssembler &Asm, MCFragment &Fragment,
+ void RecordScatteredRelocation(const MCAssembler &Asm,
+ const MCFragment &Fragment,
const MCAsmFixup &Fixup, MCValue Target,
uint64_t &FixedValue) {
uint32_t Address = Fragment.getOffset() + Fixup.Offset;
@@ -584,9 +484,10 @@ public:
Relocations[Fragment.getParent()].push_back(MRE);
}
- void RecordRelocation(MCAssembler &Asm, MCDataFragment &Fragment,
- const MCAsmFixup &Fixup, MCValue Target,
- uint64_t &FixedValue) {
+ virtual void RecordRelocation(const MCAssembler &Asm,
+ const MCDataFragment &Fragment,
+ const MCAsmFixup &Fixup, MCValue Target,
+ uint64_t &FixedValue) {
unsigned IsPCRel = isFixupKindPCRel(Fixup.Kind);
unsigned Log2Size = getFixupKindLog2Size(Fixup.Kind);
@@ -629,7 +530,7 @@ public:
//
// FIXME: O(N)
Index = 1;
- MCAssembler::iterator it = Asm.begin(), ie = Asm.end();
+ MCAssembler::const_iterator it = Asm.begin(), ie = Asm.end();
for (; it != ie; ++it, ++Index)
if (&*it == SD->getFragment()->getParent())
break;
@@ -807,7 +708,7 @@ public:
StringTable += '\x00';
}
- void ExecutePostLayoutBinding(MCAssembler &Asm) {
+ virtual void ExecutePostLayoutBinding(MCAssembler &Asm) {
// Create symbol data for any indirect symbols.
BindIndirectSymbols(Asm);
@@ -816,7 +717,7 @@ public:
UndefinedSymbolData);
}
- void WriteObject(const MCAssembler &Asm) {
+ virtual void WriteObject(const MCAssembler &Asm) {
unsigned NumSections = Asm.size();
// The section data starts after the header, the segment load command (and
@@ -916,7 +817,7 @@ public:
// Write the actual section data.
for (MCAssembler::const_iterator it = Asm.begin(),
ie = Asm.end(); it != ie; ++it)
- WriteFileData(OS, *it, this);
+ Asm.WriteSectionData(it, this);
// Write the extra padding.
WriteZeros(SectionDataPadding);
@@ -1357,10 +1258,9 @@ static uint64_t WriteNopData(uint64_t Count, MCObjectWriter *OW) {
return Count;
}
-/// WriteFileData - Write the \arg F data to the output file.
-static void WriteFileData(raw_ostream &OS, const MCFragment &F,
- MCObjectWriter *OW) {
- uint64_t Start = OS.tell();
+/// WriteFragmentData - Write the \arg F data to the output file.
+static void WriteFragmentData(const MCFragment &F, MCObjectWriter *OW) {
+ uint64_t Start = OW->getStream().tell();
(void) Start;
++EmittedFragments;
@@ -1402,7 +1302,7 @@ static void WriteFileData(raw_ostream &OS, const MCFragment &F,
}
case MCFragment::FT_Data: {
- OS << cast<MCDataFragment>(F).getContents().str();
+ OW->WriteBytes(cast<MCDataFragment>(F).getContents().str());
break;
}
@@ -1436,30 +1336,29 @@ static void WriteFileData(raw_ostream &OS, const MCFragment &F,
}
}
- assert(OS.tell() - Start == F.getFileSize());
+ assert(OW->getStream().tell() - Start == F.getFileSize());
}
-/// WriteFileData - Write the \arg SD data to the output file.
-static void WriteFileData(raw_ostream &OS, const MCSectionData &SD,
- MCObjectWriter *OW) {
+void MCAssembler::WriteSectionData(const MCSectionData *SD,
+ MCObjectWriter *OW) const {
// Ignore virtual sections.
- if (isVirtualSection(SD.getSection())) {
- assert(SD.getFileSize() == 0);
+ if (isVirtualSection(SD->getSection())) {
+ assert(SD->getFileSize() == 0);
return;
}
- uint64_t Start = OS.tell();
+ uint64_t Start = OW->getStream().tell();
(void) Start;
- for (MCSectionData::const_iterator it = SD.begin(),
- ie = SD.end(); it != ie; ++it)
- WriteFileData(OS, *it, OW);
+ for (MCSectionData::const_iterator it = SD->begin(),
+ ie = SD->end(); it != ie; ++it)
+ WriteFragmentData(*it, OW);
// Add section padding.
- assert(SD.getFileSize() >= SD.getSize() && "Invalid section sizes!");
- OW->WriteZeros(SD.getFileSize() - SD.getSize());
+ assert(SD->getFileSize() >= SD->getSize() && "Invalid section sizes!");
+ OW->WriteZeros(SD->getFileSize() - SD->getSize());
- assert(OS.tell() - Start == SD.getFileSize());
+ assert(OW->getStream().tell() - Start == SD->getFileSize());
}
void MCAssembler::Finish() {
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-04-27 11:30:49 +0000