--- /dev/null
+/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
+ *
+ * Copyright (c) 2009 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 x86 {
+namespace classic {
+
+
+
+
+class StubHelperAtom : public ld::Atom {
+public:
+ StubHelperAtom(ld::passes::stubs::Pass& pass, const ld::Atom& stubTo,
+ const ld::Atom& lazyPointer, bool forLazyDylib)
+ : 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(1, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressLittleEndian32, &lazyPointer),
+ _fixup2(6, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressX86BranchPCRel32,
+ forLazyDylib ? pass.internal()->lazyBindingHelper : pass.internal()->classicBindingHelper)
+ { pass.addAtom(*this); }
+
+ virtual const ld::File* file() const { return _stubTo.file(); }
+ virtual bool translationUnitSource(const char** dir, const char** ) const
+ { return false; }
+ virtual const char* name() const { return _stubTo.name(); }
+ virtual uint64_t size() const { return 10; }
+ virtual uint64_t objectAddress() const { return 0; }
+ virtual void copyRawContent(uint8_t buffer[]) const {
+ buffer[0] = 0x68; // pushl $foo$lazy_ptr
+ buffer[1] = 0x00;
+ buffer[2] = 0x00;
+ buffer[3] = 0x00;
+ buffer[4] = 0x00;
+ buffer[5] = 0xE9; // jmp dyld_stub_binding_helper
+ buffer[6] = 0x00;
+ buffer[7] = 0x00;
+ buffer[8] = 0x00;
+ buffer[9] = 0x00;
+ }
+ 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;
+ mutable ld::Fixup _fixup1;
+ mutable ld::Fixup _fixup2;
+
+ static ld::Section _s_section;
+};
+
+ld::Section StubHelperAtom::_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 forLazyDylib, bool weakImport)
+ : ld::Atom( forLazyDylib ? _s_sectionLazy : _s_section,
+ ld::Atom::definitionRegular, ld::Atom::combineNever,
+ ld::Atom::scopeTranslationUnit,
+ forLazyDylib ? ld::Atom::typeLazyDylibPointer : ld::Atom::typeLazyPointer,
+ symbolTableNotIn, false, false, false, ld::Atom::Alignment(2)),
+ _stubTo(stubTo),
+ _helper(pass, stubTo, *this, forLazyDylib),
+ _fixup1(0, ld::Fixup::k1of1, ld::Fixup::kindStoreTargetAddressLittleEndian32, &_helper),
+ _fixup2(0, ld::Fixup::k1of1, ld::Fixup::kindLazyTarget, &stubTo)
+ { _fixup2.weakImport = weakImport; pass.addAtom(*this); }
+
+ virtual const ld::File* file() const { return _stubTo.file(); }
+ virtual bool translationUnitSource(const char** dir, const char** ) 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 &_fixup1; }
+ virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup2)[1]; }
+
+private:
+ const ld::Atom& _stubTo;
+ StubHelperAtom _helper;
+ mutable ld::Fixup _fixup1;
+ mutable ld::Fixup _fixup2;
+
+ static ld::Section _s_section;
+ static ld::Section _s_sectionLazy;
+};
+
+ld::Section LazyPointerAtom::_s_section("__DATA", "__la_symbol_ptr", ld::Section::typeLazyPointer);
+ld::Section LazyPointerAtom::_s_sectionLazy("__DATA", "__ld_symbol_ptr", ld::Section::typeLazyDylibPointer);
+
+
+
+class StubAtom : public ld::Atom {
+public:
+ StubAtom(ld::passes::stubs::Pass& pass, const ld::Atom& stubTo,
+ bool forLazyDylib, 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, forLazyDylib, weakImport),
+ _fixup(2, 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** ) const
+ { return false; }
+ virtual const char* name() const { return _stubTo.name(); }
+ virtual uint64_t size() const { return 6; }
+ virtual uint64_t objectAddress() const { return 0; }
+ virtual void copyRawContent(uint8_t buffer[]) const {
+ buffer[0] = 0xFF; // jmp *foo$lazy_pointer(%rip)
+ buffer[1] = 0x25;
+ buffer[2] = 0x00;
+ buffer[3] = 0x00;
+ buffer[4] = 0x00;
+ buffer[5] = 0x00;
+ }
+ virtual void setScope(Scope) { }
+ virtual ld::Fixup::iterator fixupsBegin() const { return &_fixup; }
+ virtual ld::Fixup::iterator fixupsEnd() const { return &((ld::Fixup*)&_fixup)[1]; }
+
+private:
+ const ld::Atom& _stubTo;
+ LazyPointerAtom _lazyPointer;
+ mutable ld::Fixup _fixup;
+
+ static ld::Section _s_section;
+};
+
+ld::Section StubAtom::_s_section("__TEXT", "__symbol_stub", ld::Section::typeStub);
+
+
+} // namespace classic
+} // namespace x86
+
projects / apple / ld64.git / blobdiff