MC/Mach-O/x86_64: Add relocation support.

- This is "extraordinarily" Darwin 'as' compatible. See the litany of FIXMEs littered about for more information.
 - There are a few cases which seem to clearly be 'as' bugs which I have left unsupported, and there is one cases where we diverge but should fix if it blocks diffing .o files (Darwin 'as' ends up widening a jump unnecessarily).
 - 403.gcc build, runs, and diffs equivalently to the 'as' built version now (using llvm-mc). However, it builds so slowly that I wouldn't recommend trying it quite yet. :)

llvm-svn: 98974
This commit is contained in:
Daniel Dunbar 2010-03-19 18:07:55 +00:00
parent b478edff7c
commit 3c66c7a3c1
4 changed files with 1114 additions and 0 deletions

View File

@ -34,6 +34,7 @@ static unsigned getFixupKindLog2Size(unsigned Kind) {
case FK_Data_2: return 1;
case X86::reloc_pcrel_4byte:
case X86::reloc_riprel_4byte:
case X86::reloc_riprel_4byte_movq_load:
case FK_Data_4: return 2;
case FK_Data_8: return 3;
}
@ -46,10 +47,16 @@ static bool isFixupKindPCRel(unsigned Kind) {
case X86::reloc_pcrel_1byte:
case X86::reloc_pcrel_4byte:
case X86::reloc_riprel_4byte:
case X86::reloc_riprel_4byte_movq_load:
return true;
}
}
static bool isFixupKindRIPRel(unsigned Kind) {
return Kind == X86::reloc_riprel_4byte ||
Kind == X86::reloc_riprel_4byte_movq_load;
}
namespace {
class MachObjectWriterImpl {
@ -125,6 +132,19 @@ class MachObjectWriterImpl {
RIT_LocalDifference = 4
};
/// X86_64 uses its own relocation types.
enum RelocationInfoTypeX86_64 {
RIT_X86_64_Unsigned = 0,
RIT_X86_64_Signed = 1,
RIT_X86_64_Branch = 2,
RIT_X86_64_GOTLoad = 3,
RIT_X86_64_GOT = 4,
RIT_X86_64_Subtractor = 5,
RIT_X86_64_Signed1 = 6,
RIT_X86_64_Signed2 = 7,
RIT_X86_64_Signed4 = 8
};
/// MachSymbolData - Helper struct for containing some precomputed information
/// on symbols.
struct MachSymbolData {
@ -417,6 +437,194 @@ public:
Write32(Address);
}
void RecordX86_64Relocation(const MCAssembler &Asm,
const MCDataFragment &Fragment,
const MCAsmFixup &Fixup, MCValue Target,
uint64_t &FixedValue) {
unsigned IsPCRel = isFixupKindPCRel(Fixup.Kind);
unsigned IsRIPRel = isFixupKindRIPRel(Fixup.Kind);
unsigned Log2Size = getFixupKindLog2Size(Fixup.Kind);
// See <reloc.h>.
uint32_t Address = Fragment.getOffset() + Fixup.Offset;
int64_t Value = 0;
unsigned Index = 0;
unsigned IsExtern = 0;
unsigned Type = 0;
Value = Target.getConstant();
if (IsPCRel) {
// Compensate for the relocation offset, Darwin x86_64 relocations only
// have the addend and appear to have attempted to define it to be the
// actual expression addend without the PCrel bias. However, instructions
// with data following the relocation are not accomodated for (see comment
// below regarding SIGNED{1,2,4}), so it isn't exactly that either.
Value += 1 << Log2Size;
}
if (Target.isAbsolute()) { // constant
// SymbolNum of 0 indicates the absolute section.
Type = RIT_X86_64_Unsigned;
Index = 0;
// FIXME: I believe this is broken, I don't think the linker can
// understand it. I think it would require a local relocation, but I'm not
// sure if that would work either. The official way to get an absolute
// PCrel relocation is to use an absolute symbol (which we don't support
// yet).
if (IsPCRel) {
IsExtern = 1;
Type = RIT_X86_64_Branch;
}
} else if (Target.getSymB()) { // A - B + constant
const MCSymbol *A = &Target.getSymA()->getSymbol();
MCSymbolData &A_SD = Asm.getSymbolData(*A);
const MCSymbolData *A_Base = Asm.getAtom(&A_SD);
const MCSymbol *B = &Target.getSymB()->getSymbol();
MCSymbolData &B_SD = Asm.getSymbolData(*B);
const MCSymbolData *B_Base = Asm.getAtom(&B_SD);
// Neither symbol can be modified.
if (Target.getSymA()->getKind() != MCSymbolRefExpr::VK_None ||
Target.getSymB()->getKind() != MCSymbolRefExpr::VK_None)
llvm_report_error("unsupported relocation of modified symbol");
// We don't support PCrel relocations of differences. Darwin 'as' doesn't
// implement most of these correctly.
if (IsPCRel)
llvm_report_error("unsupported pc-relative relocation of difference");
// We don't currently support any situation where one or both of the
// symbols would require a local relocation. This is almost certainly
// unused and may not be possible to encode correctly.
if (!A_Base || !B_Base)
llvm_report_error("unsupported local relocations in difference");
// Darwin 'as' doesn't emit correct relocations for this (it ends up with
// a single SIGNED relocation); reject it for now.
if (A_Base == B_Base)
llvm_report_error("unsupported relocation with identical base");
Value += A_SD.getAddress() - A_Base->getAddress();
Value -= B_SD.getAddress() - B_Base->getAddress();
Index = A_Base->getIndex();
IsExtern = 1;
Type = RIT_X86_64_Unsigned;
MachRelocationEntry MRE;
MRE.Word0 = Address;
MRE.Word1 = ((Index << 0) |
(IsPCRel << 24) |
(Log2Size << 25) |
(IsExtern << 27) |
(Type << 28));
Relocations[Fragment.getParent()].push_back(MRE);
Index = B_Base->getIndex();
IsExtern = 1;
Type = RIT_X86_64_Subtractor;
} else {
const MCSymbol *Symbol = &Target.getSymA()->getSymbol();
MCSymbolData &SD = Asm.getSymbolData(*Symbol);
const MCSymbolData *Base = Asm.getAtom(&SD);
// x86_64 almost always uses external relocations, except when there is no
// symbol to use as a base address (a local symbol with no preceeding
// non-local symbol).
if (Base) {
Index = Base->getIndex();
IsExtern = 1;
// Add the local offset, if needed.
if (Base != &SD)
Value += SD.getAddress() - Base->getAddress();
} else {
// The index is the section ordinal.
//
// FIXME: O(N)
Index = 1;
MCAssembler::const_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!");
IsExtern = 0;
Value += SD.getAddress();
if (IsPCRel)
Value -= Address + (1 << Log2Size);
}
MCSymbolRefExpr::VariantKind Modifier = Target.getSymA()->getKind();
if (IsPCRel) {
if (IsRIPRel) {
if (Modifier == MCSymbolRefExpr::VK_GOTPCREL) {
// x86_64 distinguishes movq foo@GOTPCREL so that the linker can
// rewrite the movq to an leaq at link time if the symbol ends up in
// the same linkage unit.
if (unsigned(Fixup.Kind) == X86::reloc_riprel_4byte_movq_load)
Type = RIT_X86_64_GOTLoad;
else
Type = RIT_X86_64_GOT;
} else if (Modifier != MCSymbolRefExpr::VK_None)
llvm_report_error("unsupported symbol modifier in relocation");
else
Type = RIT_X86_64_Signed;
} else {
if (Modifier != MCSymbolRefExpr::VK_None)
llvm_report_error("unsupported symbol modifier in branch "
"relocation");
Type = RIT_X86_64_Branch;
}
// The Darwin x86_64 relocation format has a problem where it cannot
// encode an address (L<foo> + <constant>) which is outside the atom
// containing L<foo>. Generally, this shouldn't occur but it does happen
// when we have a RIPrel instruction with data following the relocation
// entry (e.g., movb $012, L0(%rip)). Even with the PCrel adjustment
// Darwin x86_64 uses, the offset is still negative and the linker has
// no way to recognize this.
//
// To work around this, Darwin uses several special relocation types to
// indicate the offsets. However, the specification or implementation of
// these seems to also be incomplete; they should adjust the addend as
// well based on the actual encoded instruction (the additional bias),
// but instead appear to just look at the final offset.
if (IsRIPRel) {
switch (-(Target.getConstant() + (1 << Log2Size))) {
case 1: Type = RIT_X86_64_Signed1; break;
case 2: Type = RIT_X86_64_Signed2; break;
case 4: Type = RIT_X86_64_Signed4; break;
}
}
} else {
if (Modifier == MCSymbolRefExpr::VK_GOT)
Type = RIT_X86_64_GOT;
else if (Modifier != MCSymbolRefExpr::VK_None)
llvm_report_error("unsupported symbol modifier in relocation");
else
Type = RIT_X86_64_Unsigned;
}
}
// x86_64 always writes custom values into the fixups.
FixedValue = Value;
// struct relocation_info (8 bytes)
MachRelocationEntry MRE;
MRE.Word0 = Address;
MRE.Word1 = ((Index << 0) |
(IsPCRel << 24) |
(Log2Size << 25) |
(IsExtern << 27) |
(Type << 28));
Relocations[Fragment.getParent()].push_back(MRE);
}
void RecordScatteredRelocation(const MCAssembler &Asm,
const MCFragment &Fragment,
const MCAsmFixup &Fixup, MCValue Target,
@ -479,6 +687,11 @@ public:
const MCDataFragment &Fragment,
const MCAsmFixup &Fixup, MCValue Target,
uint64_t &FixedValue) {
if (Is64Bit) {
RecordX86_64Relocation(Asm, Fragment, Fixup, Target, FixedValue);
return;
}
unsigned IsPCRel = isFixupKindPCRel(Fixup.Kind);
unsigned Log2Size = getFixupKindLog2Size(Fixup.Kind);

View File

@ -0,0 +1,329 @@
// RUN: llvm-mc -triple x86_64-apple-darwin10 %s -filetype=obj -o - | macho-dump --dump-section-data | FileCheck %s
.text
// FIXME: llvm-mc doesn't handle this in a way we can make compatible with 'as',
// currently, because of how we handle assembler variables.
//
// See <rdar://problem/7763719> improve handling of absolute symbols
// _baz = 4
_foo:
xorl %eax,%eax
_g0:
xorl %eax,%eax
L0:
jmp 4
// jmp _baz
// FIXME: Darwin 'as' for historical reasons widens this jump, but doesn't emit
// a relocation. It seems like 'as' widens any jump that is not to a temporary,
// which is inherited from the x86_32 behavior, even though x86_64 could do
// better.
// jmp _g0
jmp L0
jmp _g1
// FIXME: Darwin 'as' gets this wrong as well, even though it could get it right
// given the other things we do on x86_64. It is using a short jump here. This
// is probably fallout of the hack that exists for x86_32.
// jmp L1
// FIXME: We don't support this, and would currently get it wrong, it should be a jump to an absolute address.
// jmp L0 - _g0
// jmp _g1 - _g0
// FIXME: Darwin 'as' comes up with 'SIGNED' here instead of 'BRANCH'.
// jmp _g1 - L1
// FIXME: Darwin 'as' gets this completely wrong. It ends up with a single
// branch relocation. Fallout from the other delta hack?
// jmp L1 - _g0
jmp _g2
jmp L2
jmp _g3
jmp L3
// FIXME: Darwin 'as' gets this completely wrong. It ends up with a single
// branch relocation. Fallout from the other delta hack?
// jmp L2 - _g3
// jmp _g3 - _g2
// FIXME: Darwin 'as' comes up with 'SIGNED' here instead of 'BRANCH'.
// jmp _g3 - L3
// FIXME: Darwin 'as' gets this completely wrong. It ends up with a single
// branch relocation. Fallout from the other delta hack?
// jmp L3 - _g2
movl %eax,4(%rip)
// movl %eax,_baz(%rip)
movl %eax,_g0(%rip)
movl %eax,L0(%rip)
movl %eax,_g1(%rip)
movl %eax,L1(%rip)
// FIXME: Darwin 'as' gets most of these wrong, and there is an ambiguity in ATT
// syntax in what they should mean in the first place (absolute or
// rip-relative address).
// movl %eax,L0 - _g0(%rip)
// movl %eax,_g1 - _g0(%rip)
// movl %eax,_g1 - L1(%rip)
// movl %eax,L1 - _g0(%rip)
movl %eax,_g2(%rip)
movl %eax,L2(%rip)
movl %eax,_g3(%rip)
movl %eax,L3(%rip)
// FIXME: Darwin 'as' gets most of these wrong, and there is an ambiguity in ATT
// syntax in what they should mean in the first place (absolute or
// rip-relative address).
// movl %eax,L2 - _g2(%rip)
// movl %eax,_g3 - _g2(%rip)
// movl %eax,_g3 - L3(%rip)
// movl %eax,L3 - _g2(%rip)
_g1:
xorl %eax,%eax
L1:
xorl %eax,%eax
.data
_g2:
xorl %eax,%eax
L2:
.quad 4
// .quad _baz
.quad _g2
.quad L2
.quad _g3
.quad L3
.quad L2 - _g2
.quad _g3 - _g2
.quad L3 - _g2
.quad L3 - _g3
.quad _g0
.quad L0
.quad _g1
.quad L1
.quad L0 - _g0
.quad _g1 - _g0
.quad L1 - _g0
.quad L1 - _g1
_g3:
xorl %eax,%eax
L3:
xorl %eax,%eax
// CHECK: ('cputype', 16777223)
// CHECK: ('cpusubtype', 3)
// CHECK: ('filetype', 1)
// CHECK: ('num_load_commands', 1)
// CHECK: ('load_commands_size', 336)
// CHECK: ('flag', 0)
// CHECK: ('reserved', 0)
// CHECK: ('load_commands', [
// CHECK: # Load Command 0
// CHECK: (('command', 25)
// CHECK: ('size', 232)
// CHECK: ('segment_name', '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('vm_addr', 0)
// CHECK: ('vm_size', 236)
// CHECK: ('file_offset', 368)
// CHECK: ('file_size', 236)
// CHECK: ('maxprot', 7)
// CHECK: ('initprot', 7)
// CHECK: ('num_sections', 2)
// CHECK: ('flags', 0)
// CHECK: ('sections', [
// CHECK: # Section 0
// CHECK: (('section_name', '__text\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('segment_name', '__TEXT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('address', 0)
// CHECK: ('size', 94)
// CHECK: ('offset', 368)
// CHECK: ('alignment', 0)
// CHECK: ('reloc_offset', 604)
// CHECK: ('num_reloc', 12)
// CHECK: ('flags', 0x80000400)
// CHECK: ('reserved1', 0)
// CHECK: ('reserved2', 0)
// CHECK: ('reserved3', 0)
// CHECK: ),
// CHECK: ('_relocations', [
// FIXME: Unfortunately, we do not get these relocations in exactly the same
// order as Darwin 'as'. It turns out that 'as' *usually* ends up emitting
// them in reverse address order, but sometimes it allocates some
// additional relocations late so these end up preceed the other entries. I
// haven't figured out the exact criteria for this yet.
// CHECK: (('word-0', 0x56),
// CHECK: ('word-1', 0x1d000004)),
// CHECK: (('word-0', 0x50),
// CHECK: ('word-1', 0x1d000004)),
// CHECK: (('word-0', 0x4a),
// CHECK: ('word-1', 0x1d000003)),
// CHECK: (('word-0', 0x44),
// CHECK: ('word-1', 0x1d000003)),
// CHECK: (('word-0', 0x3e),
// CHECK: ('word-1', 0x1d000002)),
// CHECK: (('word-0', 0x38),
// CHECK: ('word-1', 0x1d000002)),
// CHECK: (('word-0', 0x20),
// CHECK: ('word-1', 0x2d000004)),
// CHECK: (('word-0', 0x1b),
// CHECK: ('word-1', 0x2d000004)),
// CHECK: (('word-0', 0x16),
// CHECK: ('word-1', 0x2d000003)),
// CHECK: (('word-0', 0x11),
// CHECK: ('word-1', 0x2d000003)),
// CHECK: (('word-0', 0xc),
// CHECK: ('word-1', 0x2d000002)),
// CHECK: (('word-0', 0x5),
// CHECK: ('word-1', 0x2d000000)),
// CHECK: ])
// CHECK: # Section 1
// CHECK: (('section_name', '__data\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('segment_name', '__DATA\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('address', 94)
// CHECK: ('size', 142)
// CHECK: ('offset', 462)
// CHECK: ('alignment', 0)
// CHECK: ('reloc_offset', 700)
// CHECK: ('num_reloc', 16)
// CHECK: ('flags', 0x400)
// CHECK: ('reserved1', 0)
// CHECK: ('reserved2', 0)
// CHECK: ('reserved3', 0)
// CHECK: ),
// CHECK: ('_relocations', [
// CHECK: # Relocation 0
// CHECK: (('word-0', 0x7a),
// CHECK: ('word-1', 0x5e000001)),
// CHECK: # Relocation 1
// CHECK: (('word-0', 0x7a),
// CHECK: ('word-1', 0xe000002)),
// CHECK: # Relocation 2
// CHECK: (('word-0', 0x72),
// CHECK: ('word-1', 0x5e000001)),
// CHECK: # Relocation 3
// CHECK: (('word-0', 0x72),
// CHECK: ('word-1', 0xe000002)),
// CHECK: # Relocation 4
// CHECK: (('word-0', 0x62),
// CHECK: ('word-1', 0xe000002)),
// CHECK: # Relocation 5
// CHECK: (('word-0', 0x5a),
// CHECK: ('word-1', 0xe000002)),
// CHECK: # Relocation 6
// CHECK: (('word-0', 0x52),
// CHECK: ('word-1', 0xe000001)),
// CHECK: # Relocation 7
// CHECK: (('word-0', 0x4a),
// CHECK: ('word-1', 0xe000001)),
// CHECK: # Relocation 8
// CHECK: (('word-0', 0x3a),
// CHECK: ('word-1', 0x5e000003)),
// CHECK: # Relocation 9
// CHECK: (('word-0', 0x3a),
// CHECK: ('word-1', 0xe000004)),
// CHECK: # Relocation 10
// CHECK: (('word-0', 0x32),
// CHECK: ('word-1', 0x5e000003)),
// CHECK: # Relocation 11
// CHECK: (('word-0', 0x32),
// CHECK: ('word-1', 0xe000004)),
// CHECK: # Relocation 12
// CHECK: (('word-0', 0x22),
// CHECK: ('word-1', 0xe000004)),
// CHECK: # Relocation 13
// CHECK: (('word-0', 0x1a),
// CHECK: ('word-1', 0xe000004)),
// CHECK: # Relocation 14
// CHECK: (('word-0', 0x12),
// CHECK: ('word-1', 0xe000003)),
// CHECK: # Relocation 15
// CHECK: (('word-0', 0xa),
// CHECK: ('word-1', 0xe000003)),
// CHECK: ])
// CHECK: ])
// CHECK: ),
// CHECK: # Load Command 1
// CHECK: (('command', 2)
// CHECK: ('size', 24)
// CHECK: ('symoff', 828)
// CHECK: ('nsyms', 5)
// CHECK: ('stroff', 908)
// CHECK: ('strsize', 24)
// CHECK: ('_string_data', '\x00_foo\x00_g0\x00_g1\x00_g2\x00_g3\x00\x00\x00')
// CHECK: ('_symbols', [
// CHECK: # Symbol 0
// CHECK: (('n_strx', 1)
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 1)
// CHECK: ('n_desc', 0)
// CHECK: ('n_value', 0)
// CHECK: ('_string', '_foo')
// CHECK: ),
// CHECK: # Symbol 1
// CHECK: (('n_strx', 6)
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 1)
// CHECK: ('n_desc', 0)
// CHECK: ('n_value', 2)
// CHECK: ('_string', '_g0')
// CHECK: ),
// CHECK: # Symbol 2
// CHECK: (('n_strx', 10)
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 1)
// CHECK: ('n_desc', 0)
// CHECK: ('n_value', 90)
// CHECK: ('_string', '_g1')
// CHECK: ),
// CHECK: # Symbol 3
// CHECK: (('n_strx', 14)
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 2)
// CHECK: ('n_desc', 0)
// CHECK: ('n_value', 94)
// CHECK: ('_string', '_g2')
// CHECK: ),
// CHECK: # Symbol 4
// CHECK: (('n_strx', 18)
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 2)
// CHECK: ('n_desc', 0)
// CHECK: ('n_value', 232)
// CHECK: ('_string', '_g3')
// CHECK: ),
// CHECK: ])
// CHECK: ),
// CHECK: # Load Command 2
// CHECK: (('command', 11)
// CHECK: ('size', 80)
// CHECK: ('ilocalsym', 0)
// CHECK: ('nlocalsym', 5)
// CHECK: ('iextdefsym', 5)
// CHECK: ('nextdefsym', 0)
// CHECK: ('iundefsym', 5)
// CHECK: ('nundefsym', 0)
// CHECK: ('tocoff', 0)
// CHECK: ('ntoc', 0)
// CHECK: ('modtaboff', 0)
// CHECK: ('nmodtab', 0)
// CHECK: ('extrefsymoff', 0)
// CHECK: ('nextrefsyms', 0)
// CHECK: ('indirectsymoff', 0)
// CHECK: ('nindirectsyms', 0)
// CHECK: ('extreloff', 0)
// CHECK: ('nextrel', 0)
// CHECK: ('locreloff', 0)
// CHECK: ('nlocrel', 0)
// CHECK: ('_indirect_symbols', [
// CHECK: ])
// CHECK: ),
// CHECK: ])

View File

@ -0,0 +1,343 @@
// RUN: llvm-mc -triple x86_64-apple-darwin10 %s -filetype=obj -o - | macho-dump --dump-section-data | FileCheck %s
.data
.org 0x10
L0:
.long 0
.long 0
.long 0
.long 0
_d:
.long 0
L1:
.long 0
.text
// These generate normal x86_64 (external) relocations. They could all use
// SIGNED, but don't for pedantic compatibility with Darwin 'as'.
// SIGNED1
movb $0x12, _d(%rip)
// SIGNED
movb $0x12, _d + 1(%rip)
// SIGNED4
movl $0x12345678, _d(%rip)
// SIGNED
movl $0x12345678, _d + 1(%rip)
// SIGNED2
movl $0x12345678, _d + 2(%rip)
// SIGNED1
movl $0x12345678, _d + 3(%rip)
// SIGNED
movl $0x12345678, _d + 4(%rip)
movb %al, _d(%rip)
movb %al, _d + 1(%rip)
movl %eax, _d(%rip)
movl %eax, _d + 1(%rip)
movl %eax, _d + 2(%rip)
movl %eax, _d + 3(%rip)
movl %eax, _d + 4(%rip)
// These have to use local relocations. Since that uses an offset into the
// section in x86_64 (as opposed to a scattered relocation), and since the
// linker can only decode this to an atom + offset by scanning the section,
// it is not possible to correctly encode these without SIGNED<N>. This is
// ultimately due to a design flaw in the x86_64 relocation format, it is
// not possible to encode an address (L<foo> + <constant>) which is outside the
// atom containing L<foo>.
// SIGNED1
movb $0x12, L0(%rip)
// SIGNED
movb $0x12, L0 + 1(%rip)
// SIGNED4
movl $0x12345678, L0(%rip)
// SIGNED
movl $0x12345678, L0 + 1(%rip)
// SIGNED2
movl $0x12345678, L0 + 2(%rip)
// SIGNED1
movl $0x12345678, L0 + 3(%rip)
// SIGNED
movl $0x12345678, L0 + 4(%rip)
movb %al, L0(%rip)
movb %al, L0 + 1(%rip)
movl %eax, L0(%rip)
movl %eax, L0 + 1(%rip)
movl %eax, L0 + 2(%rip)
movl %eax, L0 + 3(%rip)
movl %eax, L0 + 4(%rip)
// SIGNED1
movb $0x12, L1(%rip)
// SIGNED
movb $0x12, L1 + 1(%rip)
// SIGNED4
movl $0x12345678, L1(%rip)
// SIGNED
movl $0x12345678, L1 + 1(%rip)
// SIGNED2
movl $0x12345678, L1 + 2(%rip)
// SIGNED1
movl $0x12345678, L1 + 3(%rip)
// SIGNED
movl $0x12345678, L1 + 4(%rip)
movb %al, L1(%rip)
movb %al, L1 + 1(%rip)
movl %eax, L1(%rip)
movl %eax, L1 + 1(%rip)
movl %eax, L1 + 2(%rip)
movl %eax, L1 + 3(%rip)
movl %eax, L1 + 4(%rip)
// CHECK: ('cputype', 16777223)
// CHECK: ('cpusubtype', 3)
// CHECK: ('filetype', 1)
// CHECK: ('num_load_commands', 1)
// CHECK: ('load_commands_size', 336)
// CHECK: ('flag', 0)
// CHECK: ('reserved', 0)
// CHECK: ('load_commands', [
// CHECK: # Load Command 0
// CHECK: (('command', 25)
// CHECK: ('size', 232)
// CHECK: ('segment_name', '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('vm_addr', 0)
// CHECK: ('vm_size', 358)
// CHECK: ('file_offset', 368)
// CHECK: ('file_size', 358)
// CHECK: ('maxprot', 7)
// CHECK: ('initprot', 7)
// CHECK: ('num_sections', 2)
// CHECK: ('flags', 0)
// CHECK: ('sections', [
// CHECK: # Section 0
// CHECK: (('section_name', '__text\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('segment_name', '__TEXT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('address', 0)
// CHECK: ('size', 318)
// CHECK: ('offset', 368)
// CHECK: ('alignment', 0)
// CHECK: ('reloc_offset', 728)
// CHECK: ('num_reloc', 42)
// CHECK: ('flags', 0x80000400)
// CHECK: ('reserved1', 0)
// CHECK: ('reserved2', 0)
// CHECK: ('reserved3', 0)
// CHECK: ),
// CHECK: ('_relocations', [
// CHECK: # Relocation 0
// CHECK: (('word-0', 0x13a),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 1
// CHECK: (('word-0', 0x134),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 2
// CHECK: (('word-0', 0x12e),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 3
// CHECK: (('word-0', 0x128),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 4
// CHECK: (('word-0', 0x122),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 5
// CHECK: (('word-0', 0x11c),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 6
// CHECK: (('word-0', 0x116),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 7
// CHECK: (('word-0', 0x10c),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 8
// CHECK: (('word-0', 0x102),
// CHECK: ('word-1', 0x6d000000)),
// CHECK: # Relocation 9
// CHECK: (('word-0', 0xf8),
// CHECK: ('word-1', 0x7d000000)),
// CHECK: # Relocation 10
// CHECK: (('word-0', 0xee),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 11
// CHECK: (('word-0', 0xe4),
// CHECK: ('word-1', 0x8d000000)),
// CHECK: # Relocation 12
// CHECK: (('word-0', 0xdd),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 13
// CHECK: (('word-0', 0xd6),
// CHECK: ('word-1', 0x6d000000)),
// CHECK: # Relocation 14
// CHECK: (('word-0', 0xd0),
// CHECK: ('word-1', 0x15000002)),
// CHECK: # Relocation 15
// CHECK: (('word-0', 0xca),
// CHECK: ('word-1', 0x15000002)),
// CHECK: # Relocation 16
// CHECK: (('word-0', 0xc4),
// CHECK: ('word-1', 0x15000002)),
// CHECK: # Relocation 17
// CHECK: (('word-0', 0xbe),
// CHECK: ('word-1', 0x15000002)),
// CHECK: # Relocation 18
// CHECK: (('word-0', 0xb8),
// CHECK: ('word-1', 0x15000002)),
// CHECK: # Relocation 19
// CHECK: (('word-0', 0xb2),
// CHECK: ('word-1', 0x15000002)),
// CHECK: # Relocation 20
// CHECK: (('word-0', 0xac),
// CHECK: ('word-1', 0x15000002)),
// CHECK: # Relocation 21
// CHECK: (('word-0', 0xa2),
// CHECK: ('word-1', 0x15000002)),
// CHECK: # Relocation 22
// CHECK: (('word-0', 0x98),
// CHECK: ('word-1', 0x65000002)),
// CHECK: # Relocation 23
// CHECK: (('word-0', 0x8e),
// CHECK: ('word-1', 0x75000002)),
// CHECK: # Relocation 24
// CHECK: (('word-0', 0x84),
// CHECK: ('word-1', 0x15000002)),
// CHECK: # Relocation 25
// CHECK: (('word-0', 0x7a),
// CHECK: ('word-1', 0x85000002)),
// CHECK: # Relocation 26
// CHECK: (('word-0', 0x73),
// CHECK: ('word-1', 0x15000002)),
// CHECK: # Relocation 27
// CHECK: (('word-0', 0x6c),
// CHECK: ('word-1', 0x65000002)),
// CHECK: # Relocation 28
// CHECK: (('word-0', 0x66),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 29
// CHECK: (('word-0', 0x60),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 30
// CHECK: (('word-0', 0x5a),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 31
// CHECK: (('word-0', 0x54),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 32
// CHECK: (('word-0', 0x4e),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 33
// CHECK: (('word-0', 0x48),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 34
// CHECK: (('word-0', 0x42),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 35
// CHECK: (('word-0', 0x38),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 36
// CHECK: (('word-0', 0x2e),
// CHECK: ('word-1', 0x6d000000)),
// CHECK: # Relocation 37
// CHECK: (('word-0', 0x24),
// CHECK: ('word-1', 0x7d000000)),
// CHECK: # Relocation 38
// CHECK: (('word-0', 0x1a),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 39
// CHECK: (('word-0', 0x10),
// CHECK: ('word-1', 0x8d000000)),
// CHECK: # Relocation 40
// CHECK: (('word-0', 0x9),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 41
// CHECK: (('word-0', 0x2),
// CHECK: ('word-1', 0x6d000000)),
// CHECK: ])
// CHECK: ('_section_data', '\xc6\x05\xff\xff\xff\xff\x12\xc6\x05\x00\x00\x00\x00\x12\xc7\x05\xfc\xff\xff\xffxV4\x12\xc7\x05\xfd\xff\xff\xffxV4\x12\xc7\x05\xfe\xff\xff\xffxV4\x12\xc7\x05\xff\xff\xff\xffxV4\x12\xc7\x05\x00\x00\x00\x00xV4\x12\x88\x05\x00\x00\x00\x00\x88\x05\x01\x00\x00\x00\x89\x05\x00\x00\x00\x00\x89\x05\x01\x00\x00\x00\x89\x05\x02\x00\x00\x00\x89\x05\x03\x00\x00\x00\x89\x05\x04\x00\x00\x00\xc6\x05\xdd\x00\x00\x00\x12\xc6\x05\xd7\x00\x00\x00\x12\xc7\x05\xcc\x00\x00\x00xV4\x12\xc7\x05\xc3\x00\x00\x00xV4\x12\xc7\x05\xba\x00\x00\x00xV4\x12\xc7\x05\xb1\x00\x00\x00xV4\x12\xc7\x05\xa8\x00\x00\x00xV4\x12\x88\x05\x9e\x00\x00\x00\x88\x05\x99\x00\x00\x00\x89\x05\x92\x00\x00\x00\x89\x05\x8d\x00\x00\x00\x89\x05\x88\x00\x00\x00\x89\x05\x83\x00\x00\x00\x89\x05~\x00\x00\x00\xc6\x05\x03\x00\x00\x00\x12\xc6\x05\x04\x00\x00\x00\x12\xc7\x05\x00\x00\x00\x00xV4\x12\xc7\x05\x01\x00\x00\x00xV4\x12\xc7\x05\x02\x00\x00\x00xV4\x12\xc7\x05\x03\x00\x00\x00xV4\x12\xc7\x05\x04\x00\x00\x00xV4\x12\x88\x05\x04\x00\x00\x00\x88\x05\x05\x00\x00\x00\x89\x05\x04\x00\x00\x00\x89\x05\x05\x00\x00\x00\x89\x05\x06\x00\x00\x00\x89\x05\x07\x00\x00\x00\x89\x05\x08\x00\x00\x00')
// CHECK: # Section 1
// CHECK: (('section_name', '__data\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('segment_name', '__DATA\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('address', 318)
// CHECK: ('size', 40)
// CHECK: ('offset', 686)
// CHECK: ('alignment', 0)
// CHECK: ('reloc_offset', 0)
// CHECK: ('num_reloc', 0)
// CHECK: ('flags', 0x0)
// CHECK: ('reserved1', 0)
// CHECK: ('reserved2', 0)
// CHECK: ('reserved3', 0)
// CHECK: ),
// CHECK: ('_relocations', [
// CHECK: ])
// CHECK: ('_section_data', '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ])
// CHECK: ),
// CHECK: # Load Command 1
// CHECK: (('command', 2)
// CHECK: ('size', 24)
// CHECK: ('symoff', 1064)
// CHECK: ('nsyms', 1)
// CHECK: ('stroff', 1080)
// CHECK: ('strsize', 4)
// CHECK: ('_string_data', '\x00_d\x00')
// CHECK: ('_symbols', [
// CHECK: # Symbol 0
// CHECK: (('n_strx', 1)
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 2)
// CHECK: ('n_desc', 0)
// CHECK: ('n_value', 350)
// CHECK: ('_string', '_d')
// CHECK: ),
// CHECK: ])
// CHECK: ),
// CHECK: # Load Command 2
// CHECK: (('command', 11)
// CHECK: ('size', 80)
// CHECK: ('ilocalsym', 0)
// CHECK: ('nlocalsym', 1)
// CHECK: ('iextdefsym', 1)
// CHECK: ('nextdefsym', 0)
// CHECK: ('iundefsym', 1)
// CHECK: ('nundefsym', 0)
// CHECK: ('tocoff', 0)
// CHECK: ('ntoc', 0)
// CHECK: ('modtaboff', 0)
// CHECK: ('nmodtab', 0)
// CHECK: ('extrefsymoff', 0)
// CHECK: ('nextrefsyms', 0)
// CHECK: ('indirectsymoff', 0)
// CHECK: ('nindirectsyms', 0)
// CHECK: ('extreloff', 0)
// CHECK: ('nextrel', 0)
// CHECK: ('locreloff', 0)
// CHECK: ('nlocrel', 0)
// CHECK: ('_indirect_symbols', [
// CHECK: ])
// CHECK: ),
// CHECK: ])

View File

@ -0,0 +1,229 @@
// RUN: llvm-mc -triple x86_64-apple-darwin9 %s -filetype=obj -o - | macho-dump --dump-section-data | FileCheck %s
// These examples are taken from <mach-o/x86_64/reloc.h>.
.text
_foo:
ret
_baz:
call _foo
call _foo+4
movq _foo@GOTPCREL(%rip), %rax
pushq _foo@GOTPCREL(%rip)
movl _foo(%rip), %eax
movl _foo+4(%rip), %eax
movb $0x12, _foo(%rip)
movl $0x12345678, _foo(%rip)
.quad _foo
_bar:
.quad _foo+4
.quad _foo - _bar
.quad _foo - _bar + 4
.long _foo - _bar
leaq L1(%rip), %rax
leaq L0(%rip), %rax
addl $6,L0(%rip)
addw $500,L0(%rip)
addl $500,L0(%rip)
_prev:
.space 12,0x90
.quad L1
L0:
.quad L0
L_pc:
.quad _foo - L_pc
.quad _foo - L1
L1:
.quad L1 - _prev
// CHECK: ('cputype', 16777223)
// CHECK: ('cpusubtype', 3)
// CHECK: ('filetype', 1)
// CHECK: ('num_load_commands', 1)
// CHECK: ('load_commands_size', 256)
// CHECK: ('flag', 0)
// CHECK: ('reserved', 0)
// CHECK: ('load_commands', [
// CHECK: # Load Command 0
// CHECK: (('command', 25)
// CHECK: ('size', 152)
// CHECK: ('segment_name', '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('vm_addr', 0)
// CHECK: ('vm_size', 181)
// CHECK: ('file_offset', 288)
// CHECK: ('file_size', 181)
// CHECK: ('maxprot', 7)
// CHECK: ('initprot', 7)
// CHECK: ('num_sections', 1)
// CHECK: ('flags', 0)
// CHECK: ('sections', [
// CHECK: # Section 0
// CHECK: (('section_name', '__text\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('segment_name', '__TEXT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('address', 0)
// CHECK: ('size', 181)
// CHECK: ('offset', 288)
// CHECK: ('alignment', 0)
// CHECK: ('reloc_offset', 472)
// CHECK: ('num_reloc', 27)
// CHECK: ('flags', 0x80000400)
// CHECK: ('reserved1', 0)
// CHECK: ('reserved2', 0)
// CHECK: ('reserved3', 0)
// CHECK: ),
// CHECK: ('_relocations', [
// CHECK: # Relocation 0
// CHECK: (('word-0', 0xa5),
// CHECK: ('word-1', 0x5e000003)),
// CHECK: # Relocation 1
// CHECK: (('word-0', 0xa5),
// CHECK: ('word-1', 0xe000000)),
// CHECK: # Relocation 2
// CHECK: (('word-0', 0x9d),
// CHECK: ('word-1', 0x5e000003)),
// CHECK: # Relocation 3
// CHECK: (('word-0', 0x9d),
// CHECK: ('word-1', 0xe000000)),
// CHECK: # Relocation 4
// CHECK: (('word-0', 0x95),
// CHECK: ('word-1', 0xe000003)),
// CHECK: # Relocation 5
// CHECK: (('word-0', 0x8d),
// CHECK: ('word-1', 0xe000003)),
// CHECK: # Relocation 6
// CHECK: (('word-0', 0x79),
// CHECK: ('word-1', 0x8d000003)),
// CHECK: # Relocation 7
// CHECK: (('word-0', 0x71),
// CHECK: ('word-1', 0x7d000003)),
// CHECK: # Relocation 8
// CHECK: (('word-0', 0x69),
// CHECK: ('word-1', 0x6d000003)),
// CHECK: # Relocation 9
// CHECK: (('word-0', 0x63),
// CHECK: ('word-1', 0x1d000003)),
// CHECK: # Relocation 10
// CHECK: (('word-0', 0x5c),
// CHECK: ('word-1', 0x1d000003)),
// CHECK: # Relocation 11
// CHECK: (('word-0', 0x55),
// CHECK: ('word-1', 0x5c000002)),
// CHECK: # Relocation 12
// CHECK: (('word-0', 0x55),
// CHECK: ('word-1', 0xc000000)),
// CHECK: # Relocation 13
// CHECK: (('word-0', 0x4d),
// CHECK: ('word-1', 0x5e000002)),
// CHECK: # Relocation 14
// CHECK: (('word-0', 0x4d),
// CHECK: ('word-1', 0xe000000)),
// CHECK: # Relocation 15
// CHECK: (('word-0', 0x45),
// CHECK: ('word-1', 0x5e000002)),
// CHECK: # Relocation 16
// CHECK: (('word-0', 0x45),
// CHECK: ('word-1', 0xe000000)),
// CHECK: # Relocation 17
// CHECK: (('word-0', 0x3d),
// CHECK: ('word-1', 0xe000000)),
// CHECK: # Relocation 18
// CHECK: (('word-0', 0x35),
// CHECK: ('word-1', 0xe000000)),
// CHECK: # Relocation 19
// CHECK: (('word-0', 0x2d),
// CHECK: ('word-1', 0x8d000000)),
// CHECK: # Relocation 20
// CHECK: (('word-0', 0x26),
// CHECK: ('word-1', 0x6d000000)),
// CHECK: # Relocation 21
// CHECK: (('word-0', 0x20),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 22
// CHECK: (('word-0', 0x1a),
// CHECK: ('word-1', 0x1d000000)),
// CHECK: # Relocation 23
// CHECK: (('word-0', 0x14),
// CHECK: ('word-1', 0x4d000000)),
// CHECK: # Relocation 24
// CHECK: (('word-0', 0xe),
// CHECK: ('word-1', 0x3d000000)),
// CHECK: # Relocation 25
// CHECK: (('word-0', 0x7),
// CHECK: ('word-1', 0x2d000000)),
// CHECK: # Relocation 26
// CHECK: (('word-0', 0x2),
// CHECK: ('word-1', 0x2d000000)),
// CHECK: ])
// CHECK: ('_section_data', '\xc3\xe8\x00\x00\x00\x00\xe8\x04\x00\x00\x00H\x8b\x05\x00\x00\x00\x00\xff5\x00\x00\x00\x00\x8b\x05\x00\x00\x00\x00\x8b\x05\x04\x00\x00\x00\xc6\x05\xff\xff\xff\xff\x12\xc7\x05\xfc\xff\xff\xffxV4\x12\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00H\x8d\x05,\x00\x00\x00H\x8d\x05\x14\x00\x00\x00\x83\x05\x13\x00\x00\x00\x06f\x81\x05\x12\x00\x00\x00\xf4\x01\x81\x05\x10\x00\x00\x00\xf4\x01\x00\x00\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90,\x00\x00\x00\x00\x00\x00\x00\x14\x00\x00\x00\x00\x00\x00\x00\xe4\xff\xff\xff\xff\xff\xff\xff\xd4\xff\xff\xff\xff\xff\xff\xff,\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ])
// CHECK: ),
// CHECK: # Load Command 1
// CHECK: (('command', 2)
// CHECK: ('size', 24)
// CHECK: ('symoff', 688)
// CHECK: ('nsyms', 4)
// CHECK: ('stroff', 752)
// CHECK: ('strsize', 24)
// CHECK: ('_string_data', '\x00_foo\x00_baz\x00_bar\x00_prev\x00\x00\x00')
// CHECK: ('_symbols', [
// CHECK: # Symbol 0
// CHECK: (('n_strx', 1)
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 1)
// CHECK: ('n_desc', 0)
// CHECK: ('n_value', 0)
// CHECK: ('_string', '_foo')
// CHECK: ),
// CHECK: # Symbol 1
// CHECK: (('n_strx', 6)
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 1)
// CHECK: ('n_desc', 0)
// CHECK: ('n_value', 1)
// CHECK: ('_string', '_baz')
// CHECK: ),
// CHECK: # Symbol 2
// CHECK: (('n_strx', 11)
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 1)
// CHECK: ('n_desc', 0)
// CHECK: ('n_value', 61)
// CHECK: ('_string', '_bar')
// CHECK: ),
// CHECK: # Symbol 3
// CHECK: (('n_strx', 16)
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 1)
// CHECK: ('n_desc', 0)
// CHECK: ('n_value', 129)
// CHECK: ('_string', '_prev')
// CHECK: ),
// CHECK: ])
// CHECK: ),
// CHECK: # Load Command 2
// CHECK: (('command', 11)
// CHECK: ('size', 80)
// CHECK: ('ilocalsym', 0)
// CHECK: ('nlocalsym', 4)
// CHECK: ('iextdefsym', 4)
// CHECK: ('nextdefsym', 0)
// CHECK: ('iundefsym', 4)
// CHECK: ('nundefsym', 0)
// CHECK: ('tocoff', 0)
// CHECK: ('ntoc', 0)
// CHECK: ('modtaboff', 0)
// CHECK: ('nmodtab', 0)
// CHECK: ('extrefsymoff', 0)
// CHECK: ('nextrefsyms', 0)
// CHECK: ('indirectsymoff', 0)
// CHECK: ('nindirectsyms', 0)
// CHECK: ('extreloff', 0)
// CHECK: ('nextrel', 0)
// CHECK: ('locreloff', 0)
// CHECK: ('nlocrel', 0)
// CHECK: ('_indirect_symbols', [
// CHECK: ])
// CHECK: ),
// CHECK: ])