--- /dev/null
+/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
+ *
+ * Copyright (c) 2009-2010 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 arm {
+
+
+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(2)),
+ _fixup(0, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressLittleEndian32, pass.internal()->compressedFastBinderProxy)
+ { pass.addAtom(*this); }
+
+ virtual const ld::File* file() const { return NULL; }
+ virtual bool translationUnitSource(const char** dir, const char** nm) const
+ { return false; }
+ virtual const char* name() const { return "fast binder pointer"; }
+ virtual uint64_t size() const { return 4; }
+ 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*)&_fixup; }
+ virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup)[1]; }
+
+private:
+ ld::Fixup _fixup;
+
+ static ld::Section _s_section;
+};
+
+ld::Section FastBindingPointerAtom::_s_section("__DATA", "__nl_symbol_ptr", 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(2)) { pass.addAtom(*this); }
+
+ virtual const ld::File* file() const { return NULL; }
+ virtual bool translationUnitSource(const char** dir, const char** nm) const
+ { return false; }
+ virtual const char* name() const { return "non-lazy pointer"; }
+ virtual uint64_t size() const { return 4; }
+ 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", "__nl_symbol_ptr", ld::Section::typeNonLazyPointer);
+
+
+
+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,
+ ld::Atom::symbolTableIn, false, false, false, ld::Atom::Alignment(2)),
+ _fixup1(28, ld::Fixup::k1of4, ld::Fixup::kindSetTargetAddress, compressedImageCache(pass)),
+ _fixup2(28, ld::Fixup::k2of4, ld::Fixup::kindSubtractTargetAddress, this),
+ _fixup3(28, ld::Fixup::k3of4, ld::Fixup::kindSubtractAddend, 16),
+ _fixup4(28, ld::Fixup::k4of4, ld::Fixup::kindStoreLittleEndian32),
+ _fixup5(32, ld::Fixup::k1of4, ld::Fixup::kindSetTargetAddress, compressedFastBinder(pass)),
+ _fixup6(32, ld::Fixup::k2of4, ld::Fixup::kindSubtractTargetAddress, this),
+ _fixup7(32, ld::Fixup::k3of4, ld::Fixup::kindSubtractAddend, 28),
+ _fixup8(32, ld::Fixup::k4of4, ld::Fixup::kindStoreLittleEndian32)
+ { pass.addAtom(*this); }
+
+ virtual ld::File* file() const { return NULL; }
+ virtual bool translationUnitSource(const char** dir, const char** nm) const
+ { return false; }
+ virtual const char* name() const { return " stub helpers"; }
+ virtual uint64_t size() const { return 36; }
+ virtual uint64_t objectAddress() const { return 0; }
+ virtual void copyRawContent(uint8_t buffer[]) const {
+ // push lazy-info-offset
+ OSWriteLittleInt32(&buffer[ 0], 0, 0xe52dc004); // str ip, [sp, #-4]!
+ // push address of dyld_mageLoaderCache
+ OSWriteLittleInt32(&buffer[ 4], 0, 0xe59fc010); // ldr ip, L1
+ OSWriteLittleInt32(&buffer[ 8], 0, 0xe08fc00c); // add ip, pc, ip
+ OSWriteLittleInt32(&buffer[12], 0, 0xe52dc004); // str ip, [sp, #-4]!
+ // jump through _fast_lazy_bind
+ OSWriteLittleInt32(&buffer[16], 0, 0xe59fc008); // ldr ip, L2
+ OSWriteLittleInt32(&buffer[20], 0, 0xe08fc00c); // add ip, pc, ip
+ OSWriteLittleInt32(&buffer[24], 0, 0xe59cf000); // ldr pc, [ip]
+ OSWriteLittleInt32(&buffer[28], 0, 0x00000000); // L1: .long fFastStubGOTAtom - (helperhelper+16)
+ OSWriteLittleInt32(&buffer[32], 0, 0x00000000); // L2: .long _fast_lazy_bind - (helperhelper+28)
+ }
+ virtual void setScope(Scope) { }
+ virtual ld::Fixup::iterator fixupsBegin() const { return (ld::Fixup*)&_fixup1; }
+ virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup8)[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;
+ }
+
+ ld::Fixup _fixup1;
+ ld::Fixup _fixup2;
+ ld::Fixup _fixup3;
+ ld::Fixup _fixup4;
+ ld::Fixup _fixup5;
+ ld::Fixup _fixup6;
+ ld::Fixup _fixup7;
+ ld::Fixup _fixup8;
+
+ 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& stubTo,
+ const ld::Atom* lazyPointer)
+ : ld::Atom(_s_section, ld::Atom::definitionRegular, ld::Atom::combineNever,
+ ld::Atom::scopeLinkageUnit, ld::Atom::typeStubHelper,
+ symbolTableNotIn, false, false, false, ld::Atom::Alignment(2)),
+ _stubTo(stubTo),
+ _fixup1(4, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARMBranch24, 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 bool translationUnitSource(const char** dir, const char** nm) const
+ { return false; }
+ 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, 0xe59fc000); // ldr ip, [pc, #0]
+ OSWriteLittleInt32(&buffer[4], 0, 0xea000000); // b _helperhelper
+ OSWriteLittleInt32(&buffer[8], 0, 0); // .long lazy-info-offset
+ }
+ virtual void setScope(Scope) { }
+ virtual ld::Fixup::iterator fixupsBegin() const { return (ld::Fixup*)&_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;
+ 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& stubTo,
+ const ld::Atom* lazyPointer)
+ : ld::Atom(_s_section, ld::Atom::definitionRegular, ld::Atom::combineNever,
+ ld::Atom::scopeLinkageUnit, ld::Atom::typeStubHelper,
+ ld::Atom::symbolTableNotIn, false, false, false, ld::Atom::Alignment(2)),
+ _stubTo(stubTo),
+ _fixup1( 4, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARMBranch24, &stubTo),
+ _fixup2(32, ld::Fixup::k1of4, ld::Fixup::kindSetTargetAddress, lazyPointer),
+ _fixup3(32, ld::Fixup::k2of4, ld::Fixup::kindSubtractTargetAddress, this),
+ _fixup4(32, ld::Fixup::k3of4, ld::Fixup::kindSubtractAddend, 20),
+ _fixup5(32, ld::Fixup::k4of4, ld::Fixup::kindStoreLittleEndian32) { }
+
+ virtual const ld::File* file() const { return _stubTo.file(); }
+ virtual bool translationUnitSource(const char** dir, const char** nm) const
+ { return false; }
+ virtual const char* name() const { return _stubTo.name(); }
+ virtual uint64_t size() const { return 36; }
+ virtual uint64_t objectAddress() const { return 0; }
+ virtual void copyRawContent(uint8_t buffer[]) const {
+ OSWriteLittleInt32(&buffer[ 0], 0, 0xe92d400f); // push {r0, r1, r2, r3, lr}
+ OSWriteLittleInt32(&buffer[ 4], 0, 0xebfffffd); // bl _foo
+ OSWriteLittleInt32(&buffer[ 8], 0, 0xe59fc010); // ldr ip, [pc, #16]
+ OSWriteLittleInt32(&buffer[12], 0, 0xe08fc00c); // add ip, pc, ip
+ OSWriteLittleInt32(&buffer[16], 0, 0xe58c0000); // str r0, [ip]
+ OSWriteLittleInt32(&buffer[20], 0, 0xe1a0c000); // mov ip, r0
+ OSWriteLittleInt32(&buffer[24], 0, 0xe8bd400f); // pop {r0, r1, r2, r3, lr}
+ OSWriteLittleInt32(&buffer[28], 0, 0xe12fff1c); // bx ip
+ OSWriteLittleInt32(&buffer[32], 0, 0x00000000); // .long foo$lazyptr - helper + 20
+ }
+ virtual void setScope(Scope) { }
+ virtual ld::Fixup::iterator fixupsBegin() const { return (ld::Fixup*)&_fixup1; }
+ virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup5)[1]; }
+
+private:
+ const ld::Atom& _stubTo;
+ ld::Fixup _fixup1;
+ ld::Fixup _fixup2;
+ ld::Fixup _fixup3;
+ ld::Fixup _fixup4;
+ ld::Fixup _fixup5;
+
+ 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 close)
+ : ld::Atom(close ? _s_sectionClose : _s_section, ld::Atom::definitionRegular,
+ ld::Atom::combineNever, ld::Atom::scopeLinkageUnit, ld::Atom::typeLazyPointer,
+ symbolTableNotIn, false, false, false, ld::Atom::Alignment(2)),
+ _stubTo(stubTo),
+ _helper(pass, stubTo, this),
+ _resolverHelper(pass, stubTo, this),
+ _fixup1(0, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressLittleEndian32,
+ 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 bool translationUnitSource(const char** dir, const char** nm) const
+ { return false; }
+ virtual const char* name() const { return _stubTo.name(); }
+ virtual uint64_t size() const { return 4; }
+ 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*)&_fixup2)[1]; }
+
+private:
+ const ld::Atom& _stubTo;
+ StubHelperAtom _helper;
+ ResolverHelperAtom _resolverHelper;
+ ld::Fixup _fixup1;
+ ld::Fixup _fixup2;
+
+ static ld::Section _s_section;
+ static ld::Section _s_sectionClose;
+};
+
+ld::Section LazyPointerAtom::_s_section("__DATA", "__la_symbol_ptr", ld::Section::typeLazyPointer);
+ld::Section LazyPointerAtom::_s_sectionClose("__DATA", "__lazy_symbol", ld::Section::typeLazyPointerClose);
+
+
+
+class StubPICAtom : public ld::Atom {
+public:
+ StubPICAtom(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(2)),
+ _stubTo(stubTo),
+ _lazyPointer(pass, stubTo, stubToGlobalWeakDef, stubToResolver, weakImport, false),
+ _fixup1(12, ld::Fixup::k1of4, ld::Fixup::kindSetTargetAddress, &_lazyPointer),
+ _fixup2(12, ld::Fixup::k2of4, ld::Fixup::kindSubtractTargetAddress, this),
+ _fixup3(12, ld::Fixup::k3of4, ld::Fixup::kindSubtractAddend, 12),
+ _fixup4(12, ld::Fixup::k4of4, ld::Fixup::kindStoreLittleEndian32)
+ { pass.addAtom(*this); }
+
+ virtual const ld::File* file() const { return _stubTo.file(); }
+ virtual bool translationUnitSource(const char** dir, const char** nm) const
+ { return false; }
+ virtual const char* name() const { return _stubTo.name(); }
+ virtual uint64_t size() const { return 16; }
+ virtual uint64_t objectAddress() const { return 0; }
+ virtual void copyRawContent(uint8_t buffer[]) const {
+ OSWriteLittleInt32(&buffer[ 0], 0, 0xe59fc004); // ldr ip, pc + 12
+ OSWriteLittleInt32(&buffer[ 4], 0, 0xe08fc00c); // add ip, pc, ip
+ OSWriteLittleInt32(&buffer[ 8], 0, 0xe59cf000); // ldr pc, [ip]
+ OSWriteLittleInt32(&buffer[12], 0, 0x00000000); // .long L_foo$lazy_ptr - (L1$scv + 8)
+ }
+ virtual void setScope(Scope) { }
+ virtual ld::Fixup::iterator fixupsBegin() const { return (ld::Fixup*)&_fixup1; }
+ virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup4)[1]; }
+
+private:
+ const ld::Atom& _stubTo;
+ LazyPointerAtom _lazyPointer;
+ ld::Fixup _fixup1;
+ ld::Fixup _fixup2;
+ ld::Fixup _fixup3;
+ ld::Fixup _fixup4;
+
+ static ld::Section _s_section;
+};
+
+ld::Section StubPICAtom::_s_section("__TEXT", "__picsymbolstub4", ld::Section::typeStub);
+
+
+
+class StubNoPICAtom : public ld::Atom {
+public:
+ StubNoPICAtom(ld::passes::stubs::Pass& pass, const ld::Atom& stubTo,
+ bool stubToGlobalWeakDef, bool stubToResolver, bool weakImport)
+ : ld::Atom(_s_section, ld::Atom::definitionRegular, ld::Atom::combineNever,
+ ld::Atom::scopeLinkageUnit, ld::Atom::typeStub,
+ symbolTableNotIn, false, false, false, ld::Atom::Alignment(2)),
+ _stubTo(stubTo),
+ _lazyPointer(pass, stubTo, stubToGlobalWeakDef, stubToResolver, weakImport, false),
+ _fixup(8, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressLittleEndian32, &_lazyPointer)
+ { pass.addAtom(*this); }
+
+ virtual const ld::File* file() const { return _stubTo.file(); }
+ virtual bool translationUnitSource(const char** dir, const char** nm) const
+ { return false; }
+ virtual const char* name() const { return _stubTo.name(); }
+ virtual uint64_t size() const { return 12; }
+ virtual uint64_t objectAddress() const { return 0; }
+ virtual void copyRawContent(uint8_t buffer[]) const {
+ OSWriteLittleInt32(&buffer[ 0], 0, 0xe59fc000); // ldr ip, [pc, #0]
+ OSWriteLittleInt32(&buffer[ 4], 0, 0xe59cf000); // ldr pc, [ip]
+ OSWriteLittleInt32(&buffer[ 8], 0, 0x00000000); // .long L_foo$lazy_ptr
+ }
+ virtual void setScope(Scope) { }
+ virtual ld::Fixup::iterator fixupsBegin() const { return (ld::Fixup*)&_fixup; }
+ virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup)[1]; }
+
+private:
+ const ld::Atom& _stubTo;
+ LazyPointerAtom _lazyPointer;
+ ld::Fixup _fixup;
+
+ static ld::Section _s_section;
+};
+
+ld::Section StubNoPICAtom::_s_section("__TEXT", "__symbol_stub4", ld::Section::typeStub);
+
+
+
+
+class StubCloseAtom : public ld::Atom {
+public:
+ StubCloseAtom(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(2)),
+ _stubTo(stubTo),
+ _lazyPointer(pass, stubTo, stubToGlobalWeakDef, stubToResolver, weakImport, true),
+ _fixup(0, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressARMLoad12, &_lazyPointer)
+ { pass.addAtom(*this); }
+
+ virtual const ld::File* file() const { return _stubTo.file(); }
+ virtual bool translationUnitSource(const char** dir, const char** nm) const
+ { return false; }
+ virtual const char* name() const { return _stubTo.name(); }
+ virtual uint64_t size() const { return 4; }
+ virtual uint64_t objectAddress() const { return 0; }
+ virtual void copyRawContent(uint8_t buffer[]) const {
+ OSWriteLittleInt32(&buffer[ 0], 0, 0xE59FF000); // ldr pc, [pc, #foo$lazy_ptr]
+ }
+ virtual void setScope(Scope) { }
+ virtual ld::Fixup::iterator fixupsBegin() const { return (ld::Fixup*)&_fixup; }
+ virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup)[1]; }
+
+private:
+ const ld::Atom& _stubTo;
+ LazyPointerAtom _lazyPointer;
+ ld::Fixup _fixup;
+
+ static ld::Section _s_section;
+};
+
+ld::Section StubCloseAtom::_s_section("__TEXT", "__symbolstub1", ld::Section::typeStubClose);
+
+
+
+
+} // namespace arm
+
projects / apple / ld64.git / blobdiff