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MC/Mach-O: Shuffle enums a bit to make it harder to inadvertently use the wrong

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122334 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2010-12-21 15:26:45 +00:00
parent 025c98bdbd
commit e1feeb9da4
3 changed files with 28 additions and 15 deletions
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8
include/llvm/MC/MCMachObjectWriter.h
View File

@ -22,12 +22,17 @@ class MCMachObjectTargetWriter {
// FIXME: Remove this, we should just always use it once we no longer care
// about Darwin 'as' compatibility.
const unsigned UseAggressiveSymbolFolding : 1;
unsigned LocalDifference_RIT;
protected:
MCMachObjectTargetWriter(bool Is64Bit_, uint32_t CPUType_,
uint32_t CPUSubtype_,
bool UseAggressiveSymbolFolding_ = false);
void setLocalDifferenceRelocationType(unsigned Type) {
LocalDifference_RIT = Type;
}
public:
virtual ~MCMachObjectTargetWriter();
@ -38,6 +43,9 @@ public:
bool useAggressiveSymbolFolding() const { return UseAggressiveSymbolFolding; }
uint32_t getCPUType() const { return CPUType; }
uint32_t getCPUSubtype() const { return CPUSubtype; }
unsigned getLocalDifferenceRelocationType() const {
return LocalDifference_RIT;
}
/// @}
};

20
include/llvm/Object/MachOFormat.h
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@ -317,17 +317,24 @@ namespace macho {
RF_Scattered = 0x80000000
};
/// Common relocation info types.
enum RelocationInfoType {
RIT_Vanilla = 0,
RIT_Pair = 1,
RIT_Difference = 2,
RIT_PreboundLazyPointer = 3,
RIT_LocalDifference = 4,
RIT_TLV = 5
RIT_Difference = 2
};
/// Generic relocation info types, which are shared by some (but not all)
/// platforms.
enum RelocationInfoType_Generic {
RIT_Generic_PreboundLazyPointer = 3,
RIT_Generic_LocalDifference = 4,
RIT_Generic_TLV = 5
};
/// X86_64 uses its own relocation types.
enum RelocationInfoTypeX86_64 {
// Note that x86_64 doesn't even share the common relocation types.
RIT_X86_64_Unsigned = 0,
RIT_X86_64_Signed = 1,
RIT_X86_64_Branch = 2,
@ -342,11 +349,8 @@ namespace macho {
/// ARM also has its own relocation types.
enum RelocationInfoTypeARM {
RIT_ARM_Vanilla = 0,
RIT_ARM_Pair = 1,
RIT_ARM_Difference = 2,
RIT_ARM_LocalDifference = 3,
RIT_ARM_PreboundLazyPointer =4,
RIT_ARM_PreboundLazyPointer = 4,
RIT_ARM_Branch24Bit = 5,
RIT_ARM_ThumbBranch22Bit = 6,
RIT_ARM_ThumbBranch32Bit = 7

15
lib/MC/MachObjectWriter.cpp
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@ -766,13 +766,14 @@ public:
// relocation types from the linkers point of view, this is done solely
// for pedantic compatibility with 'as'.
Type = A_SD->isExternal() ? macho::RIT_Difference :
macho::RIT_LocalDifference;
macho::RIT_Generic_LocalDifference;
Value2 = getSymbolAddress(B_SD, Layout);
FixedValue -= getSectionAddress(B_SD->getFragment()->getParent());
}
// Relocations are written out in reverse order, so the PAIR comes first.
if (Type == macho::RIT_Difference || Type == macho::RIT_LocalDifference) {
if (Type == macho::RIT_Difference ||
Type == macho::RIT_Generic_LocalDifference) {
macho::RelocationEntry MRE;
MRE.Word0 = ((0 << 0) |
(macho::RIT_Pair << 24) |
@ -830,11 +831,11 @@ public:
// struct relocation_info (8 bytes)
macho::RelocationEntry MRE;
MRE.Word0 = Value;
MRE.Word1 = ((Index << 0) |
(IsPCRel << 24) |
(Log2Size << 25) |
(1 << 27) | // Extern
(macho::RIT_TLV << 28)); // Type
MRE.Word1 = ((Index << 0) |
(IsPCRel << 24) |
(Log2Size << 25) |
(1 << 27) | // Extern
(macho::RIT_Generic_TLV << 28)); // Type
Relocations[Fragment->getParent()].push_back(MRE);
}