/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
*
* Copyright (c) 2010-2013 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* Please see the License for the specific language governing rights and
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*/
// already in ld::passes::stubs namespace
namespace arm64 {
class FastBindingPointerAtom : public ld::Atom {
public:
FastBindingPointerAtom(ld::passes::stubs::Pass& pass)
: ld::Atom(_s_section, ld::Atom::definitionRegular, ld::Atom::combineNever,
ld::Atom::scopeLinkageUnit, ld::Atom::typeNonLazyPointer,
symbolTableNotIn, false, false, false, ld::Atom::Alignment(3)),
_fixup(0, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressLittleEndian64,
pass.internal()->compressedFastBinderProxy)
{ pass.addAtom(*this); }
virtual const ld::File* file() const { return NULL; }
virtual const char* name() const { return "fast binder pointer"; }
virtual uint64_t size() const { return 8; }
virtual uint64_t objectAddress() const { return 0; }
virtual void copyRawContent(uint8_t buffer[]) const { }
virtual void setScope(Scope) { }
virtual ld::Fixup::iterator fixupsBegin() const { return &_fixup; }
virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup)[1]; }
private:
mutable ld::Fixup _fixup;
static ld::Section _s_section;
};
ld::Section FastBindingPointerAtom::_s_section("__DATA", "__got", ld::Section::typeNonLazyPointer);
class ImageCachePointerAtom : public ld::Atom {
public:
ImageCachePointerAtom(ld::passes::stubs::Pass& pass)
: ld::Atom(_s_section, ld::Atom::definitionRegular, ld::Atom::combineNever,
ld::Atom::scopeLinkageUnit, ld::Atom::typeNonLazyPointer,
symbolTableNotIn, false, false, false, ld::Atom::Alignment(3)) { pass.addAtom(*this); }
virtual const ld::File* file() const { return NULL; }
virtual const char* name() const { return "image cache pointer"; }
virtual uint64_t size() const { return 8; }
virtual uint64_t objectAddress() const { return 0; }
virtual void copyRawContent(uint8_t buffer[]) const { }
virtual void setScope(Scope) { }
private:
static ld::Section _s_section;
};
ld::Section ImageCachePointerAtom::_s_section("__DATA", "__got", ld::Section::typeNonLazyPointer);
//
// The stub-helper-helper is the common code factored out of each helper function.
// It is in the same section as the stub-helpers.
// Similar to the PLT0 entry in ELF.
//
class StubHelperHelperAtom : public ld::Atom {
public:
StubHelperHelperAtom(ld::passes::stubs::Pass& pass)
: ld::Atom(_s_section, ld::Atom::definitionRegular, ld::Atom::combineNever,
ld::Atom::scopeLinkageUnit, ld::Atom::typeStubHelper,
symbolTableNotIn, false, false, false, ld::Atom::Alignment(2)),
_fixup1(0, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARM64Page21, compressedImageCache(pass)),
_fixup2(4, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARM64PageOff12, compressedImageCache(pass)),
_fixup3(12, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARM64Page21, compressedFastBinder(pass)),
_fixup4(16, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARM64PageOff12, compressedFastBinder(pass)),
_fixup5(ld::Fixup::kindLinkerOptimizationHint, LOH_ARM64_ADRP_ADD, 0, 4),
_fixup6(ld::Fixup::kindLinkerOptimizationHint, LOH_ARM64_ADRP_LDR, 12, 16)
{ pass.addAtom(*this); }
virtual ld::File* file() const { return NULL; }
virtual const char* name() const { return "helper helper"; }
virtual uint64_t size() const { return 24; }
virtual uint64_t objectAddress() const { return 0; }
virtual void copyRawContent(uint8_t buffer[]) const {
OSWriteLittleInt32(&buffer[ 0], 0, 0x90000011); // ADRP X17, dyld_mageLoaderCache@page
OSWriteLittleInt32(&buffer[ 4], 0, 0x91000231); // ADD X17, X17, dyld_mageLoaderCache@pageoff
OSWriteLittleInt32(&buffer[ 8], 0, 0xA9BF47F0); // STP X16/X17, [SP, #-16]!
OSWriteLittleInt32(&buffer[12], 0, 0x90000010); // ADRP X16, _fast_lazy_bind@page
OSWriteLittleInt32(&buffer[16], 0, 0xF9400210); // LDR X16, [X16,_fast_lazy_bind@pageoff]
OSWriteLittleInt32(&buffer[20], 0, 0xD61F0200); // BR X16
}
virtual void setScope(Scope) { }
virtual ld::Fixup::iterator fixupsBegin() const { return &_fixup1; }
virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup6)[1]; }
private:
static ld::Atom* compressedImageCache(ld::passes::stubs::Pass& pass) {
if ( pass.compressedImageCache == NULL )
pass.compressedImageCache = new ImageCachePointerAtom(pass);
return pass.compressedImageCache;
}
static ld::Atom* compressedFastBinder(ld::passes::stubs::Pass& pass) {
if ( pass.compressedFastBinderPointer == NULL )
pass.compressedFastBinderPointer = new FastBindingPointerAtom(pass);
return pass.compressedFastBinderPointer;
}
mutable ld::Fixup _fixup1;
ld::Fixup _fixup2;
ld::Fixup _fixup3;
ld::Fixup _fixup4;
ld::Fixup _fixup5;
ld::Fixup _fixup6;
static ld::Section _s_section;
};
ld::Section StubHelperHelperAtom::_s_section("__TEXT", "__stub_helper", ld::Section::typeStubHelper);
class StubHelperAtom : public ld::Atom {
public:
StubHelperAtom(ld::passes::stubs::Pass& pass, const ld::Atom* lazyPointer,
const ld::Atom& stubTo)
: ld::Atom(_s_section, ld::Atom::definitionRegular, ld::Atom::combineNever,
ld::Atom::scopeLinkageUnit, ld::Atom::typeStubHelper,
symbolTableNotIn, false, false, false, ld::Atom::Alignment(1)),
_stubTo(stubTo),
_fixup1(4, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARM64Branch26, helperHelper(pass)),
_fixup2(8, ld::Fixup::k1of2, ld::Fixup::kindSetLazyOffset, lazyPointer),
_fixup3(8, ld::Fixup::k2of2, ld::Fixup::kindStoreLittleEndian32) { }
virtual const ld::File* file() const { return _stubTo.file(); }
virtual const char* name() const { return _stubTo.name(); }
virtual uint64_t size() const { return 12; }
virtual uint64_t objectAddress() const { return 0; }
virtual void copyRawContent(uint8_t buffer[]) const {
OSWriteLittleInt32(&buffer[0], 0, 0x18000050); // LDR W16, L0
OSWriteLittleInt32(&buffer[4], 0, 0x14000000); // B helperhelper
OSWriteLittleInt32(&buffer[8], 0, 0x00000000); // L0: .long 0
}
virtual void setScope(Scope) { }
virtual ld::Fixup::iterator fixupsBegin() const { return &_fixup1; }
virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup3)[1]; }
private:
static ld::Atom* helperHelper(ld::passes::stubs::Pass& pass) {
if ( pass.compressedHelperHelper == NULL )
pass.compressedHelperHelper = new StubHelperHelperAtom(pass);
return pass.compressedHelperHelper;
}
const ld::Atom& _stubTo;
mutable ld::Fixup _fixup1;
ld::Fixup _fixup2;
ld::Fixup _fixup3;
static ld::Section _s_section;
};
ld::Section StubHelperAtom::_s_section("__TEXT", "__stub_helper", ld::Section::typeStubHelper);
class ResolverHelperAtom : public ld::Atom {
public:
ResolverHelperAtom(ld::passes::stubs::Pass& pass, const ld::Atom* lazyPointer,
const ld::Atom& stubTo)
: ld::Atom(_s_section, ld::Atom::definitionRegular, ld::Atom::combineNever,
ld::Atom::scopeLinkageUnit, ld::Atom::typeStubHelper,
symbolTableNotIn, false, false, false, ld::Atom::Alignment(1)),
_stubTo(stubTo),
_fixup1(24, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARM64Branch26, &stubTo),
_fixup2(28, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARM64Page21, lazyPointer),
_fixup3(32, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARM64PageOff12, lazyPointer) { }
virtual const ld::File* file() const { return _stubTo.file(); }
virtual const char* name() const { return _stubTo.name(); }
virtual uint64_t size() const { return 68; }
virtual uint64_t objectAddress() const { return 0; }
virtual void copyRawContent(uint8_t buffer[]) const {
OSWriteLittleInt32(&buffer[ 0], 0, 0xa9bf7bfd); // stp fp, lr, [sp, #-16]!
OSWriteLittleInt32(&buffer[ 4], 0, 0x910003fd); // mov fp, sp
OSWriteLittleInt32(&buffer[ 8], 0, 0xa9bf03e1); // stp x1, x0, [sp, #-16]!
OSWriteLittleInt32(&buffer[12], 0, 0xa9bf0be3); // stp x3, x2, [sp, #-16]!
OSWriteLittleInt32(&buffer[16], 0, 0xa9bf13e5); // stp x5, x4, [sp, #-16]!
OSWriteLittleInt32(&buffer[20], 0, 0xa9bf1be7); // stp x7, x6, [sp, #-16]!
OSWriteLittleInt32(&buffer[24], 0, 0x94000000); // bl _foo
OSWriteLittleInt32(&buffer[28], 0, 0x90000010); // adrp x16, lazy_pointer@PAGE
OSWriteLittleInt32(&buffer[32], 0, 0x91000210); // add x16, x16, lazy_pointer@PAGEOFF
OSWriteLittleInt32(&buffer[36], 0, 0xf9000200); // str x0, [x16]
OSWriteLittleInt32(&buffer[40], 0, 0xaa0003f0); // mov x16, x0
OSWriteLittleInt32(&buffer[44], 0, 0xa8c11be7); // ldp x7, x6, [sp], #16
OSWriteLittleInt32(&buffer[48], 0, 0xa8c113e5); // ldp x5, x4, [sp], #16
OSWriteLittleInt32(&buffer[52], 0, 0xa8c10be3); // ldp x3, x2, [sp], #16
OSWriteLittleInt32(&buffer[56], 0, 0xa8c103e1); // ldp x1, x0, [sp], #16
OSWriteLittleInt32(&buffer[60], 0, 0xa8c17bfd); // ldp fp, lr, [sp], #16
OSWriteLittleInt32(&buffer[64], 0, 0xd61f0200); // br x16
}
virtual void setScope(Scope) { }
virtual ld::Fixup::iterator fixupsBegin() const { return &_fixup1; }
virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup3)[1]; }
private:
const ld::Atom& _stubTo;
mutable ld::Fixup _fixup1;
ld::Fixup _fixup2;
ld::Fixup _fixup3;
static ld::Section _s_section;
};
ld::Section ResolverHelperAtom::_s_section("__TEXT", "__stub_helper", ld::Section::typeStubHelper);
class LazyPointerAtom : public ld::Atom {
public:
LazyPointerAtom(ld::passes::stubs::Pass& pass, const ld::Atom& stubTo,
bool stubToGlobalWeakDef, bool stubToResolver, bool weakImport, bool dataConstUsed)
: ld::Atom(selectSection(stubToGlobalWeakDef, stubToResolver, dataConstUsed),
ld::Atom::definitionRegular, ld::Atom::combineNever,
ld::Atom::scopeTranslationUnit, ld::Atom::typeLazyPointer,
symbolTableNotIn, false, false, false, ld::Atom::Alignment(3)),
_stubTo(stubTo),
_helper(pass, this, stubTo),
_resolverHelper(pass, this, stubTo),
_fixup1(0, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressLittleEndian64,
stubToResolver ? &_resolverHelper :
(stubToGlobalWeakDef ? &stubTo : &_helper)),
_fixup2(0, ld::Fixup::k1of1, ld::Fixup::kindLazyTarget, &stubTo) {
_fixup2.weakImport = weakImport; pass.addAtom(*this);
if ( stubToResolver )
pass.addAtom(_resolverHelper);
else if ( !stubToGlobalWeakDef )
pass.addAtom(_helper);
}
virtual const ld::File* file() const { return _stubTo.file(); }
virtual const char* name() const { return _stubTo.name(); }
virtual uint64_t size() const { return 8; }
virtual uint64_t objectAddress() const { return 0; }
virtual void copyRawContent(uint8_t buffer[]) const { }
virtual void setScope(Scope) { }
virtual ld::Fixup::iterator fixupsBegin() const { return &_fixup1; }
virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup2)[1]; }
private:
static ld::Section& selectSection(bool stubToGlobalWeakDef, bool stubToResolver, bool dataConstUsed) {
if ( stubToGlobalWeakDef && dataConstUsed )
return _s_sectionWeak;
else if ( stubToResolver && dataConstUsed )
return _s_sectionResolver;
else
return _s_section;
}
const ld::Atom& _stubTo;
StubHelperAtom _helper;
ResolverHelperAtom _resolverHelper;
mutable ld::Fixup _fixup1;
ld::Fixup _fixup2;
static ld::Section _s_section;
static ld::Section _s_sectionResolver;
static ld::Section _s_sectionWeak;
};
ld::Section LazyPointerAtom::_s_section("__DATA", "__la_symbol_ptr", ld::Section::typeLazyPointer);
ld::Section LazyPointerAtom::_s_sectionResolver("__DATA_DIRTY", "__la_resolver", ld::Section::typeLazyPointer);
ld::Section LazyPointerAtom::_s_sectionWeak("__DATA", "__la_weak_ptr", ld::Section::typeLazyPointer);
class StubAtom : public ld::Atom {
public:
StubAtom(ld::passes::stubs::Pass& pass, const ld::Atom& stubTo,
bool stubToGlobalWeakDef, bool stubToResolver, bool weakImport, bool dataConstUsed)
: ld::Atom(_s_section, ld::Atom::definitionRegular, ld::Atom::combineNever,
ld::Atom::scopeLinkageUnit, ld::Atom::typeStub,
symbolTableNotIn, false, false, false, ld::Atom::Alignment(1)),
_stubTo(stubTo),
_lazyPointer(pass, stubTo, stubToGlobalWeakDef, stubToResolver, weakImport, dataConstUsed),
_fixup1(0, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARM64Page21, &_lazyPointer),
_fixup2(4, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARM64PageOff12, &_lazyPointer),
_fixup3(ld::Fixup::kindLinkerOptimizationHint, LOH_ARM64_ADRP_LDR, 0, 4)
{ pass.addAtom(*this); }
virtual const ld::File* file() const { return _stubTo.file(); }
virtual const char* name() const { return _stubTo.name(); }
virtual uint64_t size() const { return 12; }
virtual uint64_t objectAddress() const { return 0; }
virtual void copyRawContent(uint8_t buffer[]) const {
OSWriteLittleInt32(&buffer[0], 0, 0x90000010); // ADRP X16, lazy_pointer@page
OSWriteLittleInt32(&buffer[4], 0, 0xF9400210); // LDR X16, [X16, lazy_pointer@pageoff]
OSWriteLittleInt32(&buffer[8], 0, 0xD61F0200); // BR X16
}
virtual void setScope(Scope) { }
virtual ld::Fixup::iterator fixupsBegin() const { return &_fixup1; }
virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup3)[1]; }
private:
const ld::Atom& _stubTo;
LazyPointerAtom _lazyPointer;
mutable ld::Fixup _fixup1;
mutable ld::Fixup _fixup2;
mutable ld::Fixup _fixup3;
static ld::Section _s_section;
};
ld::Section StubAtom::_s_section("__TEXT", "__stubs", ld::Section::typeStub);
class NonLazyPointerAtom : public ld::Atom {
public:
NonLazyPointerAtom(ld::passes::stubs::Pass& pass, const ld::Atom& stubTo)
: ld::Atom(_s_section, ld::Atom::definitionRegular,
ld::Atom::combineNever, ld::Atom::scopeLinkageUnit, ld::Atom::typeNonLazyPointer,
symbolTableNotIn, false, false, false, ld::Atom::Alignment(3)),
_stubTo(stubTo),
_fixup1(0, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressLittleEndian64, &stubTo) {
pass.addAtom(*this);
}
virtual const ld::File* file() const { return _stubTo.file(); }
virtual const char* name() const { return _stubTo.name(); }
virtual uint64_t size() const { return 8; }
virtual uint64_t objectAddress() const { return 0; }
virtual void copyRawContent(uint8_t buffer[]) const { }
virtual void setScope(Scope) { }
virtual ld::Fixup::iterator fixupsBegin() const { return (ld::Fixup*)&_fixup1; }
virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup1)[1]; }
private:
const ld::Atom& _stubTo;
ld::Fixup _fixup1;
static ld::Section _s_section;
};
ld::Section NonLazyPointerAtom::_s_section("__DATA", "__got", ld::Section::typeNonLazyPointer);
class KextStubAtom : public ld::Atom {
public:
KextStubAtom(ld::passes::stubs::Pass& pass, const ld::Atom& stubTo)
: ld::Atom(_s_section, ld::Atom::definitionRegular, ld::Atom::combineNever,
ld::Atom::scopeLinkageUnit, ld::Atom::typeStub,
symbolTableIn, false, false, false, ld::Atom::Alignment(1)),
_stubTo(stubTo),
_nonLazyPointer(pass, stubTo),
_fixup1(0, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARM64Page21, &_nonLazyPointer),
_fixup2(4, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARM64PageOff12, &_nonLazyPointer) {
pass.addAtom(*this);
asprintf((char**)&_name, "%s.stub", _stubTo.name());
}
virtual const ld::File* file() const { return _stubTo.file(); }
virtual const char* name() const { return _name; }
virtual uint64_t size() const { return 12; }
virtual uint64_t objectAddress() const { return 0; }
virtual void copyRawContent(uint8_t buffer[]) const {
OSWriteLittleInt32(&buffer[0], 0, 0x90000010); // ADRP X16, non_lazy_pointer@page
OSWriteLittleInt32(&buffer[4], 0, 0xF9400210); // LDR X16, [X16, non_lazy_pointer@pageoff]
OSWriteLittleInt32(&buffer[8], 0, 0xD61F0200); // BR X16
}
virtual void setScope(Scope) { }
virtual ld::Fixup::iterator fixupsBegin() const { return &_fixup1; }
virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup2)[1]; }
private:
const ld::Atom& _stubTo;
const char* _name;
NonLazyPointerAtom _nonLazyPointer;
mutable ld::Fixup _fixup1;
mutable ld::Fixup _fixup2;
static ld::Section _s_section;
};
ld::Section KextStubAtom::_s_section("__TEXT", "__stubs", ld::Section::typeCode);
} // namespace x86_64