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MCAssembler: Fix pcrel relocations. Oh and,

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--
ddunbar@ozzy:tmp$ clang -m32 -integrated-as hello.c && ./a.out
hello world!
--

llvm-svn: 96096
This commit is contained in:
Daniel Dunbar 2010-02-13 09:45:59 +00:00
parent c05a38a3d3
commit e6679afaa7
1 changed files with 23 additions and 2 deletions
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25
lib/MC/MCAssembler.cpp
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@ -64,6 +64,17 @@ static unsigned getFixupKindLog2Size(MCFixupKind Kind) {
}
}
static bool isFixupKindPCRel(MCFixupKind Kind) {
switch (Kind) {
default:
return false;
case X86::reloc_pcrel_1byte:
case X86::reloc_pcrel_4byte:
case X86::reloc_riprel_4byte:
return true;
}
}
class MachObjectWriter {
// See <mach-o/loader.h>.
enum {
@ -447,6 +458,10 @@ public:
// The value which goes in the fixup is current value of the expression.
Fixup.FixedValue = Value - Value2 + Target.getConstant();
if (isFixupKindPCRel(Fixup.Kind)) {
Fixup.FixedValue -= Address + (1 << Log2Size);
IsPCRel = 1;
}
MachRelocationEntry MRE;
MRE.Word0 = ((Address << 0) |
@ -515,10 +530,11 @@ public:
//
// FIXME: O(N)
Index = 1;
for (MCAssembler::iterator it = Asm.begin(),
ie = Asm.end(); it != ie; ++it, ++Index)
MCAssembler::iterator it = Asm.begin(), ie = Asm.end();
for (; it != ie; ++it, ++Index)
if (&*it == SD->getFragment()->getParent())
break;
assert(it != ie && "Unable to find section index!");
Value = SD->getFragment()->getAddress() + SD->getOffset();
}
@ -530,6 +546,11 @@ public:
unsigned Log2Size = getFixupKindLog2Size(Fixup.Kind);
if (isFixupKindPCRel(Fixup.Kind)) {
Fixup.FixedValue -= Address + (1<<Log2Size);
IsPCRel = 1;
}
// struct relocation_info (8 bytes)
MachRelocationEntry MRE;
MRE.Word0 = Address;