+/* -*- 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,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+
+// 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))
+ { 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*)&_fixup4)[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;
+
+ 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)
+ : ld::Atom(_s_section, 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:
+ const ld::Atom& _stubTo;
+ StubHelperAtom _helper;
+ ResolverHelperAtom _resolverHelper;
+ mutable ld::Fixup _fixup1;
+ ld::Fixup _fixup2;
+
+ static ld::Section _s_section;
+};
+
+ld::Section LazyPointerAtom::_s_section("__DATA", "__la_symbol_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)
+ : 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),
+ _fixup1(0, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARM64Page21, &_lazyPointer),
+ _fixup2(4, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARM64PageOff12, &_lazyPointer)
+ { 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*)&_fixup2)[1]; }
+
+private:
+ const ld::Atom& _stubTo;
+ LazyPointerAtom _lazyPointer;
+ mutable ld::Fixup _fixup1;
+ mutable ld::Fixup _fixup2;
+
+ 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
+
projects / apple / ld64.git / commitdiff
