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author Brian Carlstrom <bdc@google.com> 2013-05-17 10:58:25 -0700
committer Brian Carlstrom <bdc@google.com> 2013-05-21 18:37:04 -0700
commit6a47b9dc850b903aabefcfab4adb132cb68bba2e (patch)
tree924d2ea244bb01a48620e704b181a1d9d1f4055c
parent7b15b1b6809a3dc46c69610491d1b10513f449db (diff)
Refactor ElfWriter and introduce ElfWriterQuick
Change-Id: I3eaa1fa1085bb4d28fe342a7420272720e48274b
Diffstat
-rw-r--r--build/Android.libart-compiler.mk6
-rw-r--r--src/compiler/dex/write_elf.cc19
-rw-r--r--src/elf_file.cc24
-rw-r--r--src/elf_fixup.cc279
-rw-r--r--src/elf_fixup.h56
-rw-r--r--src/elf_stripper.cc129
-rw-r--r--src/elf_stripper.h37
-rw-r--r--src/elf_writer.cc715
-rw-r--r--src/elf_writer.h96
-rw-r--r--src/elf_writer_mclinker.cc394
-rw-r--r--src/elf_writer_mclinker.h99
-rw-r--r--src/elf_writer_quick.cc665
-rw-r--r--src/elf_writer_quick.h51
-rw-r--r--src/elf_writer_test.cc13
-rw-r--r--src/oat_file.cc6
-rw-r--r--src/oat_file.h3
16 files changed, 1762 insertions, 830 deletions
diff --git a/build/Android.libart-compiler.mk b/build/Android.libart-compiler.mk
index 5e34573e90..07fc14fb90 100644
--- a/build/Android.libart-compiler.mk
+++ b/build/Android.libart-compiler.mk
@@ -71,7 +71,11 @@ LIBART_COMPILER_SRC_FILES := \
src/compiler/llvm/runtime_support_builder_thumb2.cc \
src/compiler/llvm/runtime_support_builder_x86.cc \
src/compiler/llvm/runtime_support_llvm.cc \
- src/elf_writer.cc
+ src/elf_fixup.cc \
+ src/elf_stripper.cc \
+ src/elf_writer.cc \
+ src/elf_writer_mclinker.cc \
+ src/elf_writer_quick.cc
LIBART_COMPILER_CFLAGS :=
ifeq ($(ART_USE_PORTABLE_COMPILER),true)
diff --git a/src/compiler/dex/write_elf.cc b/src/compiler/dex/write_elf.cc
index acec531b6a..d9e45a9c19 100644
--- a/src/compiler/dex/write_elf.cc
+++ b/src/compiler/dex/write_elf.cc
@@ -14,9 +14,16 @@
* limitations under the License.
*/
-#include "elf_writer.h"
+#include "elf_fixup.h"
+#include "elf_stripper.h"
#include "os.h"
+#if defined(ART_USE_PORTABLE_COMPILER)
+#include "elf_writer_mclinker.h"
+#else
+#include "elf_writer_quick.h"
+#endif
+
namespace art {
class CompilerDriver;
class DexFile;
@@ -29,10 +36,14 @@ extern "C" bool WriteElf(art::CompilerDriver& driver,
std::vector<uint8_t>& oat_contents,
art::File* file)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
- return art::ElfWriter::Create(file, oat_contents, dex_files, android_root, is_host, driver);
+#if defined(ART_USE_PORTABLE_COMPILER)
+ return art::ElfWriterMclinker::Create(file, oat_contents, dex_files, android_root, is_host, driver);
+#else
+ return art::ElfWriterQuick::Create(file, oat_contents, dex_files, android_root, is_host, driver);
+#endif
}
extern "C" bool FixupElf(art::File* file, uintptr_t oat_data_begin) {
- return art::ElfWriter::Fixup(file, oat_data_begin);
+ return art::ElfFixup::Fixup(file, oat_data_begin);
}
extern "C" void GetOatElfInformation(art::File* file,
size_t& oat_loaded_size,
@@ -40,5 +51,5 @@ extern "C" void GetOatElfInformation(art::File* file,
art::ElfWriter::GetOatElfInformation(file, oat_loaded_size, oat_data_offset);
}
extern "C" bool StripElf(art::File* file) {
- return art::ElfWriter::Strip(file);
+ return art::ElfStripper::Strip(file);
}
diff --git a/src/elf_file.cc b/src/elf_file.cc
index 6f9d53c839..cb4ef81be3 100644
--- a/src/elf_file.cc
+++ b/src/elf_file.cc
@@ -616,24 +616,28 @@ bool ElfFile::Load() {
// which either was specified in the file because we already set
// base_address_ after the first zero segment).
if (program_header.p_vaddr == 0) {
- std::string reservation_name("ElfFile reservation for ");
- reservation_name += file_->GetPath();
- UniquePtr<MemMap> reserve(MemMap::MapAnonymous(reservation_name.c_str(),
- NULL, GetLoadedSize(), PROT_NONE));
- CHECK(reserve.get() != NULL) << file_->GetPath();
- base_address_ = reserve->Begin();
- segments_.push_back(reserve.release());
+ std::string reservation_name("ElfFile reservation for ");
+ reservation_name += file_->GetPath();
+ UniquePtr<MemMap> reserve(MemMap::MapAnonymous(reservation_name.c_str(),
+ NULL, GetLoadedSize(), PROT_NONE));
+ CHECK(reserve.get() != NULL) << file_->GetPath();
+ base_address_ = reserve->Begin();
+ segments_.push_back(reserve.release());
+ }
+ // empty segment, nothing to map
+ if (program_header.p_memsz == 0) {
+ continue;
}
byte* p_vaddr = base_address_ + program_header.p_vaddr;
int prot = 0;
if ((program_header.p_flags & llvm::ELF::PF_X) != 0) {
- prot |= PROT_EXEC;
+ prot |= PROT_EXEC;
}
if ((program_header.p_flags & llvm::ELF::PF_W) != 0) {
- prot |= PROT_WRITE;
+ prot |= PROT_WRITE;
}
if ((program_header.p_flags & llvm::ELF::PF_R) != 0) {
- prot |= PROT_READ;
+ prot |= PROT_READ;
}
int flags = MAP_FIXED;
if (writable_) {
diff --git a/src/elf_fixup.cc b/src/elf_fixup.cc
new file mode 100644
index 0000000000..127bc85d2c
--- /dev/null
+++ b/src/elf_fixup.cc
@@ -0,0 +1,279 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "elf_fixup.h"
+
+#include "base/logging.h"
+#include "base/stringprintf.h"
+#include "elf_file.h"
+#include "elf_writer.h"
+#include "UniquePtr.h"
+
+namespace art {
+
+static const bool DEBUG_FIXUP = false;
+
+bool ElfFixup::Fixup(File* file, uintptr_t oat_data_begin) {
+ UniquePtr<ElfFile> elf_file(ElfFile::Open(file, true, false));
+ CHECK(elf_file.get() != NULL);
+
+ // Lookup "oatdata" symbol address.
+ ::llvm::ELF::Elf32_Addr oatdata_address = ElfWriter::GetOatDataAddress(elf_file.get());
+ ::llvm::ELF::Elf32_Off base_address = oat_data_begin - oatdata_address;
+
+ if (!FixupDynamic(*elf_file.get(), base_address)) {
+ LOG(WARNING) << "Failed fo fixup .dynamic in " << file->GetPath();
+ return false;
+ }
+ if (!FixupSectionHeaders(*elf_file.get(), base_address)) {
+ LOG(WARNING) << "Failed fo fixup section headers in " << file->GetPath();
+ return false;
+ }
+ if (!FixupProgramHeaders(*elf_file.get(), base_address)) {
+ LOG(WARNING) << "Failed fo fixup program headers in " << file->GetPath();
+ return false;
+ }
+ if (!FixupSymbols(*elf_file.get(), base_address, true)) {
+ LOG(WARNING) << "Failed fo fixup .dynsym in " << file->GetPath();
+ return false;
+ }
+ if (!FixupSymbols(*elf_file.get(), base_address, false)) {
+ LOG(WARNING) << "Failed fo fixup .symtab in " << file->GetPath();
+ return false;
+ }
+ if (!FixupRelocations(*elf_file.get(), base_address)) {
+ LOG(WARNING) << "Failed fo fixup .rel.dyn in " << file->GetPath();
+ return false;
+ }
+ return true;
+}
+
+// MIPS seems to break the rules d_val vs d_ptr even though their values are between DT_LOPROC and DT_HIPROC
+#define DT_MIPS_RLD_VERSION 0x70000001 // d_val
+#define DT_MIPS_TIME_STAMP 0x70000002 // d_val
+#define DT_MIPS_ICHECKSUM 0x70000003 // d_val
+#define DT_MIPS_IVERSION 0x70000004 // d_val
+#define DT_MIPS_FLAGS 0x70000005 // d_val
+#define DT_MIPS_BASE_ADDRESS 0x70000006 // d_ptr
+#define DT_MIPS_CONFLICT 0x70000008 // d_ptr
+#define DT_MIPS_LIBLIST 0x70000009 // d_ptr
+#define DT_MIPS_LOCAL_GOTNO 0x7000000A // d_val
+#define DT_MIPS_CONFLICTNO 0x7000000B // d_val
+#define DT_MIPS_LIBLISTNO 0x70000010 // d_val
+#define DT_MIPS_SYMTABNO 0x70000011 // d_val
+#define DT_MIPS_UNREFEXTNO 0x70000012 // d_val
+#define DT_MIPS_GOTSYM 0x70000013 // d_val
+#define DT_MIPS_HIPAGENO 0x70000014 // d_val
+#define DT_MIPS_RLD_MAP 0x70000016 // d_ptr
+
+bool ElfFixup::FixupDynamic(ElfFile& elf_file, uintptr_t base_address) {
+ // TODO: C++0x auto.
+ for (::llvm::ELF::Elf32_Word i = 0; i < elf_file.GetDynamicNum(); i++) {
+ ::llvm::ELF::Elf32_Dyn& elf_dyn = elf_file.GetDynamic(i);
+ ::llvm::ELF::Elf32_Word d_tag = elf_dyn.d_tag;
+ bool elf_dyn_needs_fixup = false;
+ switch (d_tag) {
+ // case 1: well known d_tag values that imply Elf32_Dyn.d_un contains an address in d_ptr
+ case ::llvm::ELF::DT_PLTGOT:
+ case ::llvm::ELF::DT_HASH:
+ case ::llvm::ELF::DT_STRTAB:
+ case ::llvm::ELF::DT_SYMTAB:
+ case ::llvm::ELF::DT_RELA:
+ case ::llvm::ELF::DT_INIT:
+ case ::llvm::ELF::DT_FINI:
+ case ::llvm::ELF::DT_REL:
+ case ::llvm::ELF::DT_DEBUG:
+ case ::llvm::ELF::DT_JMPREL: {
+ elf_dyn_needs_fixup = true;
+ break;
+ }
+ // d_val or ignored values
+ case ::llvm::ELF::DT_NULL:
+ case ::llvm::ELF::DT_NEEDED:
+ case ::llvm::ELF::DT_PLTRELSZ:
+ case ::llvm::ELF::DT_RELASZ:
+ case ::llvm::ELF::DT_RELAENT:
+ case ::llvm::ELF::DT_STRSZ:
+ case ::llvm::ELF::DT_SYMENT:
+ case ::llvm::ELF::DT_SONAME:
+ case ::llvm::ELF::DT_RPATH:
+ case ::llvm::ELF::DT_SYMBOLIC:
+ case ::llvm::ELF::DT_RELSZ:
+ case ::llvm::ELF::DT_RELENT:
+ case ::llvm::ELF::DT_PLTREL:
+ case ::llvm::ELF::DT_TEXTREL:
+ case ::llvm::ELF::DT_BIND_NOW:
+ case ::llvm::ELF::DT_INIT_ARRAYSZ:
+ case ::llvm::ELF::DT_FINI_ARRAYSZ:
+ case ::llvm::ELF::DT_RUNPATH:
+ case ::llvm::ELF::DT_FLAGS: {
+ break;
+ }
+ // boundary values that should not be used
+ case ::llvm::ELF::DT_ENCODING:
+ case ::llvm::ELF::DT_LOOS:
+ case ::llvm::ELF::DT_HIOS:
+ case ::llvm::ELF::DT_LOPROC:
+ case ::llvm::ELF::DT_HIPROC: {
+ LOG(FATAL) << "Illegal d_tag value 0x" << std::hex << d_tag;
+ break;
+ }
+ default: {
+ // case 2: "regular" DT_* ranges where even d_tag values imply an address in d_ptr
+ if ((::llvm::ELF::DT_ENCODING < d_tag && d_tag < ::llvm::ELF::DT_LOOS)
+ || (::llvm::ELF::DT_LOOS < d_tag && d_tag < ::llvm::ELF::DT_HIOS)
+ || (::llvm::ELF::DT_LOPROC < d_tag && d_tag < ::llvm::ELF::DT_HIPROC)) {
+ // Special case for MIPS which breaks the regular rules between DT_LOPROC and DT_HIPROC
+ if (elf_file.GetHeader().e_machine == ::llvm::ELF::EM_MIPS) {
+ switch (d_tag) {
+ case DT_MIPS_RLD_VERSION:
+ case DT_MIPS_TIME_STAMP:
+ case DT_MIPS_ICHECKSUM:
+ case DT_MIPS_IVERSION:
+ case DT_MIPS_FLAGS:
+ case DT_MIPS_LOCAL_GOTNO:
+ case DT_MIPS_CONFLICTNO:
+ case DT_MIPS_LIBLISTNO:
+ case DT_MIPS_SYMTABNO:
+ case DT_MIPS_UNREFEXTNO:
+ case DT_MIPS_GOTSYM:
+ case DT_MIPS_HIPAGENO: {
+ break;
+ }
+ case DT_MIPS_BASE_ADDRESS:
+ case DT_MIPS_CONFLICT:
+ case DT_MIPS_LIBLIST:
+ case DT_MIPS_RLD_MAP: {
+ elf_dyn_needs_fixup = true;
+ break;
+ }
+ default: {
+ LOG(FATAL) << "Unknown MIPS d_tag value 0x" << std::hex << d_tag;
+ break;
+ }
+ }
+ } else if ((elf_dyn.d_tag % 2) == 0) {
+ elf_dyn_needs_fixup = true;
+ }
+ } else {
+ LOG(FATAL) << "Unknown d_tag value 0x" << std::hex << d_tag;
+ }
+ break;
+ }
+ }
+ if (elf_dyn_needs_fixup) {
+ uint32_t d_ptr = elf_dyn.d_un.d_ptr;
+ if (DEBUG_FIXUP) {
+ LOG(INFO) << StringPrintf("In %s moving Elf32_Dyn[%d] from 0x%08x to 0x%08x",
+ elf_file.GetFile().GetPath().c_str(), i,
+ d_ptr, d_ptr + base_address);
+ }
+ d_ptr += base_address;
+ elf_dyn.d_un.d_ptr = d_ptr;
+ }
+ }
+ return true;
+}
+
+bool ElfFixup::FixupSectionHeaders(ElfFile& elf_file, uintptr_t base_address) {
+ for (::llvm::ELF::Elf32_Word i = 0; i < elf_file.GetSectionHeaderNum(); i++) {
+ ::llvm::ELF::Elf32_Shdr& sh = elf_file.GetSectionHeader(i);
+ // 0 implies that the section will not exist in the memory of the process
+ if (sh.sh_addr == 0) {
+ continue;
+ }
+ if (DEBUG_FIXUP) {
+ LOG(INFO) << StringPrintf("In %s moving Elf32_Shdr[%d] from 0x%08x to 0x%08x",
+ elf_file.GetFile().GetPath().c_str(), i,
+ sh.sh_addr, sh.sh_addr + base_address);
+ }
+ sh.sh_addr += base_address;
+ }
+ return true;
+}
+
+bool ElfFixup::FixupProgramHeaders(ElfFile& elf_file, uintptr_t base_address) {
+ // TODO: ELFObjectFile doesn't have give to Elf32_Phdr, so we do that ourselves for now.
+ for (::llvm::ELF::Elf32_Word i = 0; i < elf_file.GetProgramHeaderNum(); i++) {
+ ::llvm::ELF::Elf32_Phdr& ph = elf_file.GetProgramHeader(i);
+ CHECK_EQ(ph.p_vaddr, ph.p_paddr) << elf_file.GetFile().GetPath() << " i=" << i;
+ CHECK((ph.p_align == 0) || (0 == ((ph.p_vaddr - ph.p_offset) & (ph.p_align - 1))))
+ << elf_file.GetFile().GetPath() << " i=" << i;
+ if (DEBUG_FIXUP) {
+ LOG(INFO) << StringPrintf("In %s moving Elf32_Phdr[%d] from 0x%08x to 0x%08x",
+ elf_file.GetFile().GetPath().c_str(), i,
+ ph.p_vaddr, ph.p_vaddr + base_address);
+ }
+ ph.p_vaddr += base_address;
+ ph.p_paddr += base_address;
+ CHECK((ph.p_align == 0) || (0 == ((ph.p_vaddr - ph.p_offset) & (ph.p_align - 1))))
+ << elf_file.GetFile().GetPath() << " i=" << i;
+ }
+ return true;
+}
+
+bool ElfFixup::FixupSymbols(ElfFile& elf_file, uintptr_t base_address, bool dynamic) {
+ ::llvm::ELF::Elf32_Word section_type = dynamic ? ::llvm::ELF::SHT_DYNSYM : ::llvm::ELF::SHT_SYMTAB;
+ // TODO: Unfortunate ELFObjectFile has protected symbol access, so use ElfFile
+ ::llvm::ELF::Elf32_Shdr* symbol_section = elf_file.FindSectionByType(section_type);
+ if (symbol_section == NULL) {
+ // file is missing optional .symtab
+ CHECK(!dynamic) << elf_file.GetFile().GetPath();
+ return true;
+ }
+ for (uint32_t i = 0; i < elf_file.GetSymbolNum(*symbol_section); i++) {
+ ::llvm::ELF::Elf32_Sym& symbol = elf_file.GetSymbol(section_type, i);
+ if (symbol.st_value != 0) {
+ if (DEBUG_FIXUP) {
+ LOG(INFO) << StringPrintf("In %s moving Elf32_Sym[%d] from 0x%08x to 0x%08x",
+ elf_file.GetFile().GetPath().c_str(), i,
+ symbol.st_value, symbol.st_value + base_address);
+ }
+ symbol.st_value += base_address;
+ }
+ }
+ return true;
+}
+
+bool ElfFixup::FixupRelocations(ElfFile& elf_file, uintptr_t base_address) {
+ for (llvm::ELF::Elf32_Word i = 0; i < elf_file.GetSectionHeaderNum(); i++) {
+ llvm::ELF::Elf32_Shdr& sh = elf_file.GetSectionHeader(i);
+ if (sh.sh_type == llvm::ELF::SHT_REL) {
+ for (uint32_t i = 0; i < elf_file.GetRelNum(sh); i++) {
+ llvm::ELF::Elf32_Rel& rel = elf_file.GetRel(sh, i);
+ if (DEBUG_FIXUP) {
+ LOG(INFO) << StringPrintf("In %s moving Elf32_Rel[%d] from 0x%08x to 0x%08x",
+ elf_file.GetFile().GetPath().c_str(), i,
+ rel.r_offset, rel.r_offset + base_address);
+ }
+ rel.r_offset += base_address;
+ }
+ } else if (sh.sh_type == llvm::ELF::SHT_RELA) {
+ for (uint32_t i = 0; i < elf_file.GetRelaNum(sh); i++) {
+ llvm::ELF::Elf32_Rela& rela = elf_file.GetRela(sh, i);
+ if (DEBUG_FIXUP) {
+ LOG(INFO) << StringPrintf("In %s moving Elf32_Rela[%d] from 0x%08x to 0x%08x",
+ elf_file.GetFile().GetPath().c_str(), i,
+ rela.r_offset, rela.r_offset + base_address);
+ }
+ rela.r_offset += base_address;
+ }
+ }
+ }
+ return true;
+}
+
+} // namespace art
diff --git a/src/elf_fixup.h b/src/elf_fixup.h
new file mode 100644
index 0000000000..79c45c1874
--- /dev/null
+++ b/src/elf_fixup.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_SRC_ELF_FIXUP_H_
+#define ART_SRC_ELF_FIXUP_H_
+
+#include <stdint.h>
+
+#include "base/macros.h"
+#include "os.h"
+
+namespace art {
+
+class ElfFile;
+
+class ElfFixup {
+ public:
+ // Fixup an ELF file so that that oat header will be loaded at oat_begin.
+ // Returns true on success, false on failure.
+ static bool Fixup(File* file, uintptr_t oat_data_begin);
+
+ private:
+ // Fixup .dynamic d_ptr values for the expected base_address.
+ static bool FixupDynamic(ElfFile& elf_file, uintptr_t base_address);
+
+ // Fixup Elf32_Shdr p_vaddr to load at the desired address.
+ static bool FixupSectionHeaders(ElfFile& elf_file, uintptr_t base_address);
+
+ // Fixup Elf32_Phdr p_vaddr to load at the desired address.
+ static bool FixupProgramHeaders(ElfFile& elf_file, uintptr_t base_address);
+
+ // Fixup symbol table
+ static bool FixupSymbols(ElfFile& elf_file, uintptr_t base_address, bool dynamic);
+
+ // Fixup dynamic relocations
+ static bool FixupRelocations(ElfFile& elf_file, uintptr_t base_address);
+
+ DISALLOW_IMPLICIT_CONSTRUCTORS(ElfFixup);
+};
+
+} // namespace art
+
+#endif // ART_SRC_ELF_FIXUP_H_
diff --git a/src/elf_stripper.cc b/src/elf_stripper.cc
new file mode 100644
index 0000000000..7fc662ca1d
--- /dev/null
+++ b/src/elf_stripper.cc
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "elf_stripper.h"
+
+#include <vector>
+
+#include <llvm/Support/ELF.h>
+
+#include "UniquePtr.h"
+#include "base/logging.h"
+#include "elf_file.h"
+#include "utils.h"
+
+namespace art {
+
+bool ElfStripper::Strip(File* file) {
+ UniquePtr<ElfFile> elf_file(ElfFile::Open(file, true, false));
+ CHECK(elf_file.get() != NULL);
+
+ // ELF files produced by MCLinker look roughly like this
+ //
+ // +------------+
+ // | Elf32_Ehdr | contains number of Elf32_Shdr and offset to first
+ // +------------+
+ // | Elf32_Phdr | program headers
+ // | Elf32_Phdr |
+ // | ... |
+ // | Elf32_Phdr |
+ // +------------+
+ // | section | mixture of needed and unneeded sections
+ // +------------+
+ // | section |
+ // +------------+
+ // | ... |
+ // +------------+
+ // | section |
+ // +------------+
+ // | Elf32_Shdr | section headers
+ // | Elf32_Shdr |
+ // | ... | contains offset to section start
+ // | Elf32_Shdr |
+ // +------------+
+ //
+ // To strip:
+ // - leave the Elf32_Ehdr and Elf32_Phdr values in place.
+ // - walk the sections making a new set of Elf32_Shdr section headers for what we want to keep
+ // - move the sections are keeping up to fill in gaps of sections we want to strip
+ // - write new Elf32_Shdr section headers to end of file, updating Elf32_Ehdr
+ // - truncate rest of file
+ //
+
+ std::vector<llvm::ELF::Elf32_Shdr> section_headers;
+ std::vector<llvm::ELF::Elf32_Word> section_headers_original_indexes;
+ section_headers.reserve(elf_file->GetSectionHeaderNum());
+
+
+ llvm::ELF::Elf32_Shdr& string_section = elf_file->GetSectionNameStringSection();
+ for (llvm::ELF::Elf32_Word i = 0; i < elf_file->GetSectionHeaderNum(); i++) {
+ llvm::ELF::Elf32_Shdr& sh = elf_file->GetSectionHeader(i);
+ const char* name = elf_file->GetString(string_section, sh.sh_name);
+ if (name == NULL) {
+ CHECK_EQ(0U, i);
+ section_headers.push_back(sh);
+ section_headers_original_indexes.push_back(0);
+ continue;
+ }
+ if (StartsWith(name, ".debug")
+ || (strcmp(name, ".strtab") == 0)
+ || (strcmp(name, ".symtab") == 0)) {
+ continue;
+ }
+ section_headers.push_back(sh);
+ section_headers_original_indexes.push_back(i);
+ }
+ CHECK_NE(0U, section_headers.size());
+ CHECK_EQ(section_headers.size(), section_headers_original_indexes.size());
+
+ // section 0 is the NULL section, sections start at offset of first section
+ llvm::ELF::Elf32_Off offset = elf_file->GetSectionHeader(1).sh_offset;
+ for (size_t i = 1; i < section_headers.size(); i++) {
+ llvm::ELF::Elf32_Shdr& new_sh = section_headers[i];
+ llvm::ELF::Elf32_Shdr& old_sh = elf_file->GetSectionHeader(section_headers_original_indexes[i]);
+ CHECK_EQ(new_sh.sh_name, old_sh.sh_name);
+ if (old_sh.sh_addralign > 1) {
+ offset = RoundUp(offset, old_sh.sh_addralign);
+ }
+ if (old_sh.sh_offset == offset) {
+ // already in place
+ offset += old_sh.sh_size;
+ continue;
+ }
+ // shift section earlier
+ memmove(elf_file->Begin() + offset,
+ elf_file->Begin() + old_sh.sh_offset,
+ old_sh.sh_size);
+ new_sh.sh_offset = offset;
+ offset += old_sh.sh_size;
+ }
+
+ llvm::ELF::Elf32_Off shoff = offset;
+ size_t section_headers_size_in_bytes = section_headers.size() * sizeof(llvm::ELF::Elf32_Shdr);
+ memcpy(elf_file->Begin() + offset, &section_headers[0], section_headers_size_in_bytes);
+ offset += section_headers_size_in_bytes;
+
+ elf_file->GetHeader().e_shnum = section_headers.size();
+ elf_file->GetHeader().e_shoff = shoff;
+ int result = ftruncate(file->Fd(), offset);
+ if (result != 0) {
+ PLOG(ERROR) << "Failed to truncate while stripping ELF file: " << file->GetPath();
+ return false;
+ }
+ return true;
+}
+
+} // namespace art
diff --git a/src/elf_stripper.h b/src/elf_stripper.h
new file mode 100644
index 0000000000..b202e6e1f0
--- /dev/null
+++ b/src/elf_stripper.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_SRC_ELF_STRIPPER_H_
+#define ART_SRC_ELF_STRIPPER_H_
+
+#include "base/macros.h"
+#include "os.h"
+
+namespace art {
+
+class ElfStripper {
+ public:
+ // Strip an ELF file of unneeded debugging information.
+ // Returns true on success, false on failure.
+ static bool Strip(File* file);
+
+ private:
+ DISALLOW_IMPLICIT_CONSTRUCTORS(ElfStripper);
+};
+
+} // namespace art
+
+#endif // ART_SRC_ELF_STRIPPER_H_
diff --git a/src/elf_writer.cc b/src/elf_writer.cc
index 7647da9b3b..7592eb5edb 100644
--- a/src/elf_writer.cc
+++ b/src/elf_writer.cc
@@ -16,17 +16,6 @@
#include "elf_writer.h"
-#include <llvm/Support/TargetSelect.h>
-
-#include <mcld/Environment.h>
-#include <mcld/IRBuilder.h>
-#include <mcld/Linker.h>
-#include <mcld/LinkerConfig.h>
-#include <mcld/MC/ZOption.h>
-#include <mcld/Module.h>
-#include <mcld/Support/Path.h>
-#include <mcld/Support/TargetSelect.h>
-
#include "base/unix_file/fd_file.h"
#include "class_linker.h"
#include "compiler/driver/compiler_driver.h"
@@ -43,301 +32,12 @@
namespace art {
-bool ElfWriter::Create(File* elf_file,
- std::vector<uint8_t>& oat_contents,
- const std::vector<const DexFile*>& dex_files,
- const std::string& android_root,
- bool is_host,
- const CompilerDriver& driver) {
- ElfWriter elf_writer(driver, elf_file);
- return elf_writer.Write(oat_contents, dex_files, android_root, is_host);
-}
-
ElfWriter::ElfWriter(const CompilerDriver& driver, File* elf_file)
- : compiler_driver_(&driver), elf_file_(elf_file), oat_input_(NULL) {}
+ : compiler_driver_(&driver), elf_file_(elf_file) {}
ElfWriter::~ElfWriter() {}
-bool ElfWriter::Write(std::vector<uint8_t>& oat_contents,
- const std::vector<const DexFile*>& dex_files,
- const std::string& android_root,
- bool is_host) {
- Init();
- AddOatInput(oat_contents);
-#if defined(ART_USE_PORTABLE_COMPILER)
- AddMethodInputs(dex_files);
- AddRuntimeInputs(android_root, is_host);
-#endif
- if (!Link()) {
- return false;
- }
-#if defined(ART_USE_PORTABLE_COMPILER)
- FixupOatMethodOffsets(dex_files);
-#endif
- return true;
-}
-
-static void InitializeLLVM() {
- // TODO: this is lifted from art's compiler_llvm.cc, should be factored out
- if (kIsTargetBuild) {
- llvm::InitializeNativeTarget();
- // TODO: odd that there is no InitializeNativeTargetMC?
- } else {
- llvm::InitializeAllTargets();
- llvm::InitializeAllTargetMCs();
- }
-}
-
-void ElfWriter::Init() {
- std::string target_triple;
- std::string target_cpu;
- std::string target_attr;
- CompilerDriver::InstructionSetToLLVMTarget(compiler_driver_->GetInstructionSet(),
- target_triple,
- target_cpu,
- target_attr);
-
- // Based on mclinker's llvm-mcld.cpp main() and LinkerTest
- //
- // TODO: LinkerTest uses mcld::Initialize(), but it does an
- // llvm::InitializeAllTargets, which we don't want. Basically we
- // want mcld::InitializeNative, but it doesn't exist yet, so we
- // inline the minimal we need here.
- InitializeLLVM();
- mcld::InitializeAllTargets();
- mcld::InitializeAllLinkers();
- mcld::InitializeAllEmulations();
- mcld::InitializeAllDiagnostics();
-
- linker_config_.reset(new mcld::LinkerConfig(target_triple));
- CHECK(linker_config_.get() != NULL);
- linker_config_->setCodeGenType(mcld::LinkerConfig::DynObj);
- linker_config_->options().setSOName(elf_file_->GetPath());
-
- // error on undefined symbols.
- // TODO: should this just be set if kIsDebugBuild?
- linker_config_->options().setNoUndefined(true);
-
- if (compiler_driver_->GetInstructionSet() == kMips) {
- // MCLinker defaults MIPS section alignment to 0x10000, not
- // 0x1000. The ABI says this is because the max page size is
- // general is 64k but that isn't true on Android.
- mcld::ZOption z_option;
- z_option.setKind(mcld::ZOption::MaxPageSize);
- z_option.setPageSize(kPageSize);
- linker_config_->options().addZOption(z_option);
- }
-
- // TODO: Wire up mcld DiagnosticEngine to LOG?
- linker_config_->options().setColor(false);
- if (false) {
- // enables some tracing of input file processing
- linker_config_->options().setTrace(true);
- }
-
- // Based on alone::Linker::config
- module_.reset(new mcld::Module(linker_config_->options().soname()));
- CHECK(module_.get() != NULL);
- ir_builder_.reset(new mcld::IRBuilder(*module_.get(), *linker_config_.get()));
- CHECK(ir_builder_.get() != NULL);
- linker_.reset(new mcld::Linker());
- CHECK(linker_.get() != NULL);
- linker_->config(*linker_config_.get());
-}
-
-void ElfWriter::AddOatInput(std::vector<uint8_t>& oat_contents) {
- // Add an artificial memory input. Based on LinkerTest.
- UniquePtr<OatFile> oat_file(OatFile::OpenMemory(oat_contents, elf_file_->GetPath()));
- CHECK(oat_file.get() != NULL) << elf_file_->GetPath();
-
- const char* oat_data_start = reinterpret_cast<const char*>(&oat_file->GetOatHeader());
- const size_t oat_data_length = oat_file->GetOatHeader().GetExecutableOffset();
- const char* oat_code_start = oat_data_start + oat_data_length;
- const size_t oat_code_length = oat_file->Size() - oat_data_length;
-
- // TODO: ownership of oat_input?
- oat_input_ = ir_builder_->CreateInput("oat contents",
- mcld::sys::fs::Path("oat contents path"),
- mcld::Input::Object);
- CHECK(oat_input_ != NULL);
-
- // TODO: ownership of null_section?
- mcld::LDSection* null_section = ir_builder_->CreateELFHeader(*oat_input_,
- "",
- mcld::LDFileFormat::Null,
- llvm::ELF::SHT_NULL,
- 0);
- CHECK(null_section != NULL);
-
- // TODO: we should split readonly data from readonly executable
- // code like .oat does. We need to control section layout with
- // linker script like functionality to guarantee references
- // between sections maintain relative position which isn't
- // possible right now with the mclinker APIs.
- CHECK(oat_code_start != NULL);
-
- // we need to ensure that oatdata is page aligned so when we
- // fixup the segment load addresses, they remain page aligned.
- uint32_t alignment = kPageSize;
-
- // TODO: ownership of text_section?
- mcld::LDSection* text_section = ir_builder_->CreateELFHeader(*oat_input_,
- ".text",
- llvm::ELF::SHT_PROGBITS,
- llvm::ELF::SHF_EXECINSTR
- | llvm::ELF::SHF_ALLOC,
- alignment);
- CHECK(text_section != NULL);
-
- mcld::SectionData* text_sectiondata = ir_builder_->CreateSectionData(*text_section);
- CHECK(text_sectiondata != NULL);
-
- // TODO: why does IRBuilder::CreateRegion take a non-const pointer?
- mcld::Fragment* text_fragment = ir_builder_->CreateRegion(const_cast<char*>(oat_data_start),
- oat_file->Size());
- CHECK(text_fragment != NULL);
- ir_builder_->AppendFragment(*text_fragment, *text_sectiondata);
-
- ir_builder_->AddSymbol(*oat_input_,
- "oatdata",
- mcld::ResolveInfo::Object,
- mcld::ResolveInfo::Define,
- mcld::ResolveInfo::Global,
- oat_data_length, // size
- 0, // offset
- text_section);
-
- ir_builder_->AddSymbol(*oat_input_,
- "oatexec",
- mcld::ResolveInfo::Function,
- mcld::ResolveInfo::Define,
- mcld::ResolveInfo::Global,
- oat_code_length, // size
- oat_data_length, // offset
- text_section);
-
- ir_builder_->AddSymbol(*oat_input_,
- "oatlastword",
- mcld::ResolveInfo::Object,
- mcld::ResolveInfo::Define,
- mcld::ResolveInfo::Global,
- 0, // size
- // subtract a word so symbol is within section
- (oat_data_length + oat_code_length) - sizeof(uint32_t), // offset
- text_section);
-}
-
-#if defined(ART_USE_PORTABLE_COMPILER)
-void ElfWriter::AddMethodInputs(const std::vector<const DexFile*>& dex_files) {
- DCHECK(oat_input_ != NULL);
-
- DexMethodIterator it(dex_files);
- while (it.HasNext()) {
- const DexFile& dex_file = it.GetDexFile();
- uint32_t method_idx = it.GetMemberIndex();
- const CompiledMethod* compiled_method =
- compiler_driver_->GetCompiledMethod(CompilerDriver::MethodReference(&dex_file, method_idx));
- if (compiled_method != NULL) {
- AddCompiledCodeInput(*compiled_method);
- }
- it.Next();
- }
- added_symbols_.clear();
-}
-
-void ElfWriter::AddCompiledCodeInput(const CompiledCode& compiled_code) {
- // Check if we've seen this compiled code before. If so skip
- // it. This can happen for reused code such as invoke stubs.
- const std::string& symbol = compiled_code.GetSymbol();
- SafeMap<const std::string*, const std::string*>::iterator it = added_symbols_.find(&symbol);
- if (it != added_symbols_.end()) {
- return;
- }
- added_symbols_.Put(&symbol, &symbol);
-
- // Add input to supply code for symbol
- const std::vector<uint8_t>& code = compiled_code.GetCode();
- // TODO: ownership of code_input?
- // TODO: why does IRBuilder::ReadInput take a non-const pointer?
- mcld::Input* code_input = ir_builder_->ReadInput(symbol,
- const_cast<uint8_t*>(&code[0]),
- code.size());
- CHECK(code_input != NULL);
-}
-
-void ElfWriter::AddRuntimeInputs(const std::string& android_root, bool is_host) {
- std::string libart_so(android_root);
- libart_so += kIsDebugBuild ? "/lib/libartd.so" : "/lib/libart.so";
- // TODO: ownership of libart_so_input?
- mcld::Input* libart_so_input = ir_builder_->ReadInput(libart_so, libart_so);
- CHECK(libart_so_input != NULL);
-
- std::string host_prebuilt_dir("prebuilts/gcc/linux-x86/host/i686-linux-glibc2.7-4.6");
-
- std::string compiler_runtime_lib;
- if (is_host) {
- compiler_runtime_lib += host_prebuilt_dir;
- compiler_runtime_lib += "/lib/gcc/i686-linux/4.6.x-google/libgcc.a";
- } else {
- compiler_runtime_lib += android_root;
- compiler_runtime_lib += "/lib/libcompiler_rt.a";
- }
- // TODO: ownership of compiler_runtime_lib_input?
- mcld::Input* compiler_runtime_lib_input = ir_builder_->ReadInput(compiler_runtime_lib,
- compiler_runtime_lib);
- CHECK(compiler_runtime_lib_input != NULL);
-
- std::string libc_lib;
- if (is_host) {
- libc_lib += host_prebuilt_dir;
- libc_lib += "/sysroot/usr/lib/libc.so.6";
- } else {
- libc_lib += android_root;
- libc_lib += "/lib/libc.so";
- }
- // TODO: ownership of libc_lib_input?
- mcld::Input* libc_lib_input_input = ir_builder_->ReadInput(libc_lib, libc_lib);
- CHECK(libc_lib_input_input != NULL);
-
- std::string libm_lib;
- if (is_host) {
- libm_lib += host_prebuilt_dir;
- libm_lib += "/sysroot/usr/lib/libm.so";
- } else {
- libm_lib += android_root;
- libm_lib += "/lib/libm.so";
- }
- // TODO: ownership of libm_lib_input?
- mcld::Input* libm_lib_input_input = ir_builder_->ReadInput(libm_lib, libm_lib);
- CHECK(libm_lib_input_input != NULL);
-
-}
-#endif
-
-bool ElfWriter::Link() {
- // link inputs
- if (!linker_->link(*module_.get(), *ir_builder_.get())) {
- LOG(ERROR) << "Failed to link " << elf_file_->GetPath();
- return false;
- }
-
- // emit linked output
- // TODO: avoid dup of fd by fixing Linker::emit to not close the argument fd.
- int fd = dup(elf_file_->Fd());
- if (fd == -1) {
- PLOG(ERROR) << "Failed to dup file descriptor for " << elf_file_->GetPath();
- return false;
- }
- if (!linker_->emit(fd)) {
- LOG(ERROR) << "Failed to emit " << elf_file_->GetPath();
- return false;
- }
- mcld::Finalize();
- LOG(INFO) << "ELF file written successfully: " << elf_file_->GetPath();
- return true;
-}
-
-static llvm::ELF::Elf32_Addr GetOatDataAddress(ElfFile* elf_file) {
+llvm::ELF::Elf32_Addr ElfWriter::GetOatDataAddress(ElfFile* elf_file) {
llvm::ELF::Elf32_Addr oatdata_address = elf_file->FindSymbolAddress(llvm::ELF::SHT_DYNSYM,
"oatdata",
false);
@@ -345,417 +45,6 @@ static llvm::ELF::Elf32_Addr GetOatDataAddress(ElfFile* elf_file) {
return oatdata_address;
}
-#if defined(ART_USE_PORTABLE_COMPILER)
-void ElfWriter::FixupOatMethodOffsets(const std::vector<const DexFile*>& dex_files) {
- UniquePtr<ElfFile> elf_file(ElfFile::Open(elf_file_, true, false));
- CHECK(elf_file.get() != NULL) << elf_file_->GetPath();
-
- llvm::ELF::Elf32_Addr oatdata_address = GetOatDataAddress(elf_file.get());
- DexMethodIterator it(dex_files);
- while (it.HasNext()) {
- const DexFile& dex_file = it.GetDexFile();
- uint32_t method_idx = it.GetMemberIndex();
- InvokeType invoke_type = it.GetInvokeType();
- mirror::AbstractMethod* method = NULL;
- if (compiler_driver_->IsImage()) {
- ClassLinker* linker = Runtime::Current()->GetClassLinker();
- mirror::DexCache* dex_cache = linker->FindDexCache(dex_file);
- // Unchecked as we hold mutator_lock_ on entry.
- ScopedObjectAccessUnchecked soa(Thread::Current());
- method = linker->ResolveMethod(dex_file, method_idx, dex_cache, NULL, NULL, invoke_type);
- CHECK(method != NULL);
- }
- const CompiledMethod* compiled_method =
- compiler_driver_->GetCompiledMethod(CompilerDriver::MethodReference(&dex_file, method_idx));
- if (compiled_method != NULL) {
- uint32_t offset = FixupCompiledCodeOffset(*elf_file.get(), oatdata_address, *compiled_method);
- // Don't overwrite static method trampoline
- if (method != NULL &&
- (!method->IsStatic() ||
- method->IsConstructor() ||
- method->GetDeclaringClass()->IsInitialized())) {
- method->SetOatCodeOffset(offset);
- }
- }
- it.Next();
- }
- symbol_to_compiled_code_offset_.clear();
-}
-
-uint32_t ElfWriter::FixupCompiledCodeOffset(ElfFile& elf_file,
- llvm::ELF::Elf32_Addr oatdata_address,
- const CompiledCode& compiled_code) {
- const std::string& symbol = compiled_code.GetSymbol();
- SafeMap<const std::string*, uint32_t>::iterator it = symbol_to_compiled_code_offset_.find(&symbol);
- if (it != symbol_to_compiled_code_offset_.end()) {
- return it->second;
- }
-
- llvm::ELF::Elf32_Addr compiled_code_address = elf_file.FindSymbolAddress(llvm::ELF::SHT_SYMTAB,
- symbol,
- true);
- CHECK_NE(0U, compiled_code_address) << symbol;
- CHECK_LT(oatdata_address, compiled_code_address) << symbol;
- uint32_t compiled_code_offset = compiled_code_address - oatdata_address;
- symbol_to_compiled_code_offset_.Put(&symbol, compiled_code_offset);
-
- const std::vector<uint32_t>& offsets = compiled_code.GetOatdataOffsetsToCompliledCodeOffset();
- for (uint32_t i = 0; i < offsets.size(); i++) {
- uint32_t oatdata_offset = oatdata_address + offsets[i];
- uint32_t* addr = reinterpret_cast<uint32_t*>(elf_file.Begin() + oatdata_offset);
- *addr = compiled_code_offset;
- }
- return compiled_code_offset;
-}
-#endif
-
-static const bool DEBUG_FIXUP = false;
-
-bool ElfWriter::Fixup(File* file, uintptr_t oat_data_begin) {
- UniquePtr<ElfFile> elf_file(ElfFile::Open(file, true, false));
- CHECK(elf_file.get() != NULL);
-
- // Lookup "oatdata" symbol address.
- ::llvm::ELF::Elf32_Addr oatdata_address = GetOatDataAddress(elf_file.get());
- ::llvm::ELF::Elf32_Off base_address = oat_data_begin - oatdata_address;
-
- if (!FixupDynamic(*elf_file.get(), base_address)) {
- LOG(WARNING) << "Failed fo fixup .dynamic in " << file->GetPath();
- return false;
- }
- if (!FixupSectionHeaders(*elf_file.get(), base_address)) {
- LOG(WARNING) << "Failed fo fixup section headers in " << file->GetPath();
- return false;
- }
- if (!FixupProgramHeaders(*elf_file.get(), base_address)) {
- LOG(WARNING) << "Failed fo fixup program headers in " << file->GetPath();
- return false;
- }
- if (!FixupSymbols(*elf_file.get(), base_address, true)) {
- LOG(WARNING) << "Failed fo fixup .dynsym in " << file->GetPath();
- return false;
- }
- if (!FixupSymbols(*elf_file.get(), base_address, false)) {
- LOG(WARNING) << "Failed fo fixup .symtab in " << file->GetPath();
- return false;
- }
- if (!FixupRelocations(*elf_file.get(), base_address)) {
- LOG(WARNING) << "Failed fo fixup .rel.dyn in " << file->GetPath();
- return false;
- }
- return true;
-}
-
-// MIPS seems to break the rules d_val vs d_ptr even though their values are between DT_LOPROC and DT_HIPROC
-#define DT_MIPS_RLD_VERSION 0x70000001 // d_val
-#define DT_MIPS_TIME_STAMP 0x70000002 // d_val
-#define DT_MIPS_ICHECKSUM 0x70000003 // d_val
-#define DT_MIPS_IVERSION 0x70000004 // d_val
-#define DT_MIPS_FLAGS 0x70000005 // d_val
-#define DT_MIPS_BASE_ADDRESS 0x70000006 // d_ptr
-#define DT_MIPS_CONFLICT 0x70000008 // d_ptr
-#define DT_MIPS_LIBLIST 0x70000009 // d_ptr
-#define DT_MIPS_LOCAL_GOTNO 0x7000000A // d_val
-#define DT_MIPS_CONFLICTNO 0x7000000B // d_val
-#define DT_MIPS_LIBLISTNO 0x70000010 // d_val
-#define DT_MIPS_SYMTABNO 0x70000011 // d_val
-#define DT_MIPS_UNREFEXTNO 0x70000012 // d_val
-#define DT_MIPS_GOTSYM 0x70000013 // d_val
-#define DT_MIPS_HIPAGENO 0x70000014 // d_val
-#define DT_MIPS_RLD_MAP 0x70000016 // d_ptr
-
-bool ElfWriter::FixupDynamic(ElfFile& elf_file, uintptr_t base_address) {
- // TODO: C++0x auto.
- for (::llvm::ELF::Elf32_Word i = 0; i < elf_file.GetDynamicNum(); i++) {
- ::llvm::ELF::Elf32_Dyn& elf_dyn = elf_file.GetDynamic(i);
- ::llvm::ELF::Elf32_Word d_tag = elf_dyn.d_tag;
- bool elf_dyn_needs_fixup = false;
- switch (d_tag) {
- // case 1: well known d_tag values that imply Elf32_Dyn.d_un contains an address in d_ptr
- case ::llvm::ELF::DT_PLTGOT:
- case ::llvm::ELF::DT_HASH:
- case ::llvm::ELF::DT_STRTAB:
- case ::llvm::ELF::DT_SYMTAB:
- case ::llvm::ELF::DT_RELA:
- case ::llvm::ELF::DT_INIT:
- case ::llvm::ELF::DT_FINI:
- case ::llvm::ELF::DT_REL:
- case ::llvm::ELF::DT_DEBUG:
- case ::llvm::ELF::DT_JMPREL: {
- elf_dyn_needs_fixup = true;
- break;
- }
- // d_val or ignored values
- case ::llvm::ELF::DT_NULL:
- case ::llvm::ELF::DT_NEEDED:
- case ::llvm::ELF::DT_PLTRELSZ:
- case ::llvm::ELF::DT_RELASZ:
- case ::llvm::ELF::DT_RELAENT:
- case ::llvm::ELF::DT_STRSZ:
- case ::llvm::ELF::DT_SYMENT:
- case ::llvm::ELF::DT_SONAME:
- case ::llvm::ELF::DT_RPATH:
- case ::llvm::ELF::DT_SYMBOLIC:
- case ::llvm::ELF::DT_RELSZ:
- case ::llvm::ELF::DT_RELENT:
- case ::llvm::ELF::DT_PLTREL:
- case ::llvm::ELF::DT_TEXTREL:
- case ::llvm::ELF::DT_BIND_NOW:
- case ::llvm::ELF::DT_INIT_ARRAYSZ:
- case ::llvm::ELF::DT_FINI_ARRAYSZ:
- case ::llvm::ELF::DT_RUNPATH:
- case ::llvm::ELF::DT_FLAGS: {
- break;
- }
- // boundary values that should not be used
- case ::llvm::ELF::DT_ENCODING:
- case ::llvm::ELF::DT_LOOS:
- case ::llvm::ELF::DT_HIOS:
- case ::llvm::ELF::DT_LOPROC:
- case ::llvm::ELF::DT_HIPROC: {
- LOG(FATAL) << "Illegal d_tag value 0x" << std::hex << d_tag;
- break;
- }
- default: {
- // case 2: "regular" DT_* ranges where even d_tag values imply an address in d_ptr
- if ((::llvm::ELF::DT_ENCODING < d_tag && d_tag < ::llvm::ELF::DT_LOOS)
- || (::llvm::ELF::DT_LOOS < d_tag && d_tag < ::llvm::ELF::DT_HIOS)
- || (::llvm::ELF::DT_LOPROC < d_tag && d_tag < ::llvm::ELF::DT_HIPROC)) {
- // Special case for MIPS which breaks the regular rules between DT_LOPROC and DT_HIPROC
- if (elf_file.GetHeader().e_machine == ::llvm::ELF::EM_MIPS) {
- switch (d_tag) {
- case DT_MIPS_RLD_VERSION:
- case DT_MIPS_TIME_STAMP:
- case DT_MIPS_ICHECKSUM:
- case DT_MIPS_IVERSION:
- case DT_MIPS_FLAGS:
- case DT_MIPS_LOCAL_GOTNO:
- case DT_MIPS_CONFLICTNO:
- case DT_MIPS_LIBLISTNO:
- case DT_MIPS_SYMTABNO:
- case DT_MIPS_UNREFEXTNO:
- case DT_MIPS_GOTSYM:
- case DT_MIPS_HIPAGENO: {
- break;
- }
- case DT_MIPS_BASE_ADDRESS:
- case DT_MIPS_CONFLICT:
- case DT_MIPS_LIBLIST:
- case DT_MIPS_RLD_MAP: {
- elf_dyn_needs_fixup = true;
- break;
- }
- default: {
- LOG(FATAL) << "Unknown MIPS d_tag value 0x" << std::hex << d_tag;
- break;
- }
- }
- } else if ((elf_dyn.d_tag % 2) == 0) {
- elf_dyn_needs_fixup = true;
- }
- } else {
- LOG(FATAL) << "Unknown d_tag value 0x" << std::hex << d_tag;
- }
- break;
- }
- }
- if (elf_dyn_needs_fixup) {
- uint32_t d_ptr = elf_dyn.d_un.d_ptr;
- if (DEBUG_FIXUP) {
- LOG(INFO) << StringPrintf("In %s moving Elf32_Dyn[%d] from 0x%08x to 0x%08x",
- elf_file.GetFile().GetPath().c_str(), i,
- d_ptr, d_ptr + base_address);
- }
- d_ptr += base_address;
- elf_dyn.d_un.d_ptr = d_ptr;
- }
- }
- return true;
-}
-
-bool ElfWriter::FixupSectionHeaders(ElfFile& elf_file, uintptr_t base_address) {
- for (::llvm::ELF::Elf32_Word i = 0; i < elf_file.GetSectionHeaderNum(); i++) {
- ::llvm::ELF::Elf32_Shdr& sh = elf_file.GetSectionHeader(i);
- // 0 implies that the section will not exist in the memory of the process
- if (sh.sh_addr == 0) {
- continue;
- }
- if (DEBUG_FIXUP) {
- LOG(INFO) << StringPrintf("In %s moving Elf32_Shdr[%d] from 0x%08x to 0x%08x",
- elf_file.GetFile().GetPath().c_str(), i,
- sh.sh_addr, sh.sh_addr + base_address);
- }
- sh.sh_addr += base_address;
- }
- return true;
-}
-
-bool ElfWriter::FixupProgramHeaders(ElfFile& elf_file, uintptr_t base_address) {
- // TODO: ELFObjectFile doesn't have give to Elf32_Phdr, so we do that ourselves for now.
- for (::llvm::ELF::Elf32_Word i = 0; i < elf_file.GetProgramHeaderNum(); i++) {
- ::llvm::ELF::Elf32_Phdr& ph = elf_file.GetProgramHeader(i);
- CHECK_EQ(ph.p_vaddr, ph.p_paddr) << elf_file.GetFile().GetPath() << " i=" << i;
- CHECK((ph.p_align == 0) || (0 == ((ph.p_vaddr - ph.p_offset) & (ph.p_align - 1))))
- << elf_file.GetFile().GetPath() << " i=" << i;
- if (DEBUG_FIXUP) {
- LOG(INFO) << StringPrintf("In %s moving Elf32_Phdr[%d] from 0x%08x to 0x%08x",
- elf_file.GetFile().GetPath().c_str(), i,
- ph.p_vaddr, ph.p_vaddr + base_address);
- }
- ph.p_vaddr += base_address;
- ph.p_paddr += base_address;
- CHECK((ph.p_align == 0) || (0 == ((ph.p_vaddr - ph.p_offset) & (ph.p_align - 1))))
- << elf_file.GetFile().GetPath() << " i=" << i;
- }
- return true;
-}
-
-bool ElfWriter::FixupSymbols(ElfFile& elf_file, uintptr_t base_address, bool dynamic) {
- ::llvm::ELF::Elf32_Word section_type = dynamic ? ::llvm::ELF::SHT_DYNSYM : ::llvm::ELF::SHT_SYMTAB;
- // TODO: Unfortunate ELFObjectFile has protected symbol access, so use ElfFile
- ::llvm::ELF::Elf32_Shdr* symbol_section = elf_file.FindSectionByType(section_type);
- CHECK(symbol_section != NULL) << elf_file.GetFile().GetPath();
- for (uint32_t i = 0; i < elf_file.GetSymbolNum(*symbol_section); i++) {
- ::llvm::ELF::Elf32_Sym& symbol = elf_file.GetSymbol(section_type, i);
- if (symbol.st_value != 0) {
- if (DEBUG_FIXUP) {
- LOG(INFO) << StringPrintf("In %s moving Elf32_Sym[%d] from 0x%08x to 0x%08x",
- elf_file.GetFile().GetPath().c_str(), i,
- symbol.st_value, symbol.st_value + base_address);
- }
- symbol.st_value += base_address;
- }
- }
- return true;
-}
-
-bool ElfWriter::FixupRelocations(ElfFile& elf_file, uintptr_t base_address) {
- for (llvm::ELF::Elf32_Word i = 0; i < elf_file.GetSectionHeaderNum(); i++) {
- llvm::ELF::Elf32_Shdr& sh = elf_file.GetSectionHeader(i);
- if (sh.sh_type == llvm::ELF::SHT_REL) {
- for (uint32_t i = 0; i < elf_file.GetRelNum(sh); i++) {
- llvm::ELF::Elf32_Rel& rel = elf_file.GetRel(sh, i);
- if (DEBUG_FIXUP) {
- LOG(INFO) << StringPrintf("In %s moving Elf32_Rel[%d] from 0x%08x to 0x%08x",
- elf_file.GetFile().GetPath().c_str(), i,
- rel.r_offset, rel.r_offset + base_address);
- }
- rel.r_offset += base_address;
- }
- } else if (sh.sh_type == llvm::ELF::SHT_RELA) {
- for (uint32_t i = 0; i < elf_file.GetRelaNum(sh); i++) {
- llvm::ELF::Elf32_Rela& rela = elf_file.GetRela(sh, i);
- if (DEBUG_FIXUP) {
- LOG(INFO) << StringPrintf("In %s moving Elf32_Rela[%d] from 0x%08x to 0x%08x",
- elf_file.GetFile().GetPath().c_str(), i,
- rela.r_offset, rela.r_offset + base_address);
- }
- rela.r_offset += base_address;
- }
- }
- }
- return true;
-}
-
-bool ElfWriter::Strip(File* file) {
- UniquePtr<ElfFile> elf_file(ElfFile::Open(file, true, false));
- CHECK(elf_file.get() != NULL);
-
- // ELF files produced by MCLinker look roughly like this
- //
- // +------------+
- // | Elf32_Ehdr | contains number of Elf32_Shdr and offset to first
- // +------------+
- // | Elf32_Phdr | program headers
- // | Elf32_Phdr |
- // | ... |
- // | Elf32_Phdr |
- // +------------+
- // | section | mixture of needed and unneeded sections
- // +------------+
- // | section |
- // +------------+
- // | ... |
- // +------------+
- // | section |
- // +------------+
- // | Elf32_Shdr | section headers
- // | Elf32_Shdr |
- // | ... | contains offset to section start
- // | Elf32_Shdr |
- // +------------+
- //
- // To strip:
- // - leave the Elf32_Ehdr and Elf32_Phdr values in place.
- // - walk the sections making a new set of Elf32_Shdr section headers for what we want to keep
- // - move the sections are keeping up to fill in gaps of sections we want to strip
- // - write new Elf32_Shdr section headers to end of file, updating Elf32_Ehdr
- // - truncate rest of file
- //
-
- std::vector<llvm::ELF::Elf32_Shdr> section_headers;
- std::vector<llvm::ELF::Elf32_Word> section_headers_original_indexes;
- section_headers.reserve(elf_file->GetSectionHeaderNum());
-
-
- llvm::ELF::Elf32_Shdr& string_section = elf_file->GetSectionNameStringSection();
- for (llvm::ELF::Elf32_Word i = 0; i < elf_file->GetSectionHeaderNum(); i++) {
- llvm::ELF::Elf32_Shdr& sh = elf_file->GetSectionHeader(i);
- const char* name = elf_file->GetString(string_section, sh.sh_name);
- if (name == NULL) {
- CHECK_EQ(0U, i);
- section_headers.push_back(sh);
- section_headers_original_indexes.push_back(0);
- continue;
- }
- if (StartsWith(name, ".debug")
- || (strcmp(name, ".strtab") == 0)
- || (strcmp(name, ".symtab") == 0)) {
- continue;
- }
- section_headers.push_back(sh);
- section_headers_original_indexes.push_back(i);
- }
- CHECK_NE(0U, section_headers.size());
- CHECK_EQ(section_headers.size(), section_headers_original_indexes.size());
-
- // section 0 is the NULL section, sections start at offset of first section
- llvm::ELF::Elf32_Off offset = elf_file->GetSectionHeader(1).sh_offset;
- for (size_t i = 1; i < section_headers.size(); i++) {
- llvm::ELF::Elf32_Shdr& new_sh = section_headers[i];
- llvm::ELF::Elf32_Shdr& old_sh = elf_file->GetSectionHeader(section_headers_original_indexes[i]);
- CHECK_EQ(new_sh.sh_name, old_sh.sh_name);
- if (old_sh.sh_addralign > 1) {
- offset = RoundUp(offset, old_sh.sh_addralign);
- }
- if (old_sh.sh_offset == offset) {
- // already in place
- offset += old_sh.sh_size;
- continue;
- }
- // shift section earlier
- memmove(elf_file->Begin() + offset,
- elf_file->Begin() + old_sh.sh_offset,
- old_sh.sh_size);
- new_sh.sh_offset = offset;
- offset += old_sh.sh_size;
- }
-
- llvm::ELF::Elf32_Off shoff = offset;
- size_t section_headers_size_in_bytes = section_headers.size() * sizeof(llvm::ELF::Elf32_Shdr);
- memcpy(elf_file->Begin() + offset, &section_headers[0], section_headers_size_in_bytes);
- offset += section_headers_size_in_bytes;
-
- elf_file->GetHeader().e_shnum = section_headers.size();
- elf_file->GetHeader().e_shoff = shoff;
- int result = ftruncate(file->Fd(), offset);
- if (result != 0) {
- PLOG(ERROR) << "Failed to truncate while stripping ELF file: " << file->GetPath();
- return false;
- }
- return true;
-}
-
void ElfWriter::GetOatElfInformation(File* file,
size_t& oat_loaded_size,
size_t& oat_data_offset) {
diff --git a/src/elf_writer.h b/src/elf_writer.h
index 1dd0131b6f..7392e67d7f 100644
--- a/src/elf_writer.h
+++ b/src/elf_writer.h
@@ -20,116 +20,44 @@
#include <stdint.h>
#include <cstddef>
+#include <string>
#include <vector>
#include <llvm/Support/ELF.h>
-#include "UniquePtr.h"
-#include "dex_file.h"
+#include "base/macros.h"
#include "os.h"
-namespace mcld {
-class IRBuilder;
-class Input;
-class LDSection;
-class LDSymbol;
-class Linker;
-class LinkerConfig;
-class Module;
-} // namespace mcld
-
namespace art {
-class CompiledCode;
class CompilerDriver;
+class DexFile;
class ElfFile;
class ElfWriter {
public:
- // Write an ELF file. Returns true on success, false on failure.
- static bool Create(File* file,
- std::vector<uint8_t>& oat_contents,
- const std::vector<const DexFile*>& dex_files,
- const std::string& android_root,
- bool is_host,
- const CompilerDriver& driver)
- SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
-
- // Fixup an ELF file so that that oat header will be loaded at oat_begin.
- // Returns true on success, false on failure.
- static bool Fixup(File* file, uintptr_t oat_data_begin);
-
- // Strip an ELF file of unneeded debugging information.
- // Returns true on success, false on failure.
- static bool Strip(File* file);
-
// Looks up information about location of oat file in elf file container.
// Used for ImageWriter to perform memory layout.
static void GetOatElfInformation(File* file,
size_t& oat_loaded_size,
size_t& oat_data_offset);
- private:
+ // Returns runtime oat_data runtime address for an opened ElfFile.
+ static llvm::ELF::Elf32_Addr GetOatDataAddress(ElfFile* elf_file);
+
+ protected:
ElfWriter(const CompilerDriver& driver, File* elf_file);
~ElfWriter();
- bool Write(std::vector<uint8_t>& oat_contents,
- const std::vector<const DexFile*>& dex_files,
- const std::string& android_root,
- bool is_host)
- SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
-
- void Init();
- void AddOatInput(std::vector<uint8_t>& oat_contents);
- void AddMethodInputs(const std::vector<const DexFile*>& dex_files);
- void AddCompiledCodeInput(const CompiledCode& compiled_code);
- void AddRuntimeInputs(const std::string& android_root, bool is_host);
- bool Link();
-#if defined(ART_USE_PORTABLE_COMPILER)
- void FixupOatMethodOffsets(const std::vector<const DexFile*>& dex_files)
- SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
- uint32_t FixupCompiledCodeOffset(ElfFile& elf_file,
- llvm::ELF::Elf32_Addr oatdata_address,
- const CompiledCode& compiled_code);
-#endif
-
- // Fixup .dynamic d_ptr values for the expected base_address.
- static bool FixupDynamic(ElfFile& elf_file, uintptr_t base_address);
-
- // Fixup Elf32_Shdr p_vaddr to load at the desired address.
- static bool FixupSectionHeaders(ElfFile& elf_file,uintptr_t base_address);
-
- // Fixup Elf32_Phdr p_vaddr to load at the desired address.
- static bool FixupProgramHeaders(ElfFile& elf_file,uintptr_t base_address);
-
- // Fixup symbol table
- static bool FixupSymbols(ElfFile& elf_file, uintptr_t base_address, bool dynamic);
-
- // Fixup dynamic relocations
- static bool FixupRelocations(ElfFile& elf_file, uintptr_t base_address);
+ virtual bool Write(std::vector<uint8_t>& oat_contents,
+ const std::vector<const DexFile*>& dex_files,
+ const std::string& android_root,
+ bool is_host)
+ SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) = 0;
// Setup by constructor
const CompilerDriver* compiler_driver_;
File* elf_file_;
-
- // Setup by Init()
- UniquePtr<mcld::LinkerConfig> linker_config_;
- UniquePtr<mcld::Module> module_;
- UniquePtr<mcld::IRBuilder> ir_builder_;
- UniquePtr<mcld::Linker> linker_;
-
- // Setup by AddOatInput()
- // TODO: ownership of oat_input_?
- mcld::Input* oat_input_;
-
- // Setup by AddCompiledCodeInput
- // set of symbols for already added mcld::Inputs
- SafeMap<const std::string*, const std::string*> added_symbols_;
-
- // Setup by FixupCompiledCodeOffset
- // map of symbol names to oatdata offset
- SafeMap<const std::string*, uint32_t> symbol_to_compiled_code_offset_;
-
};
} // namespace art
diff --git a/src/elf_writer_mclinker.cc b/src/elf_writer_mclinker.cc
new file mode 100644
index 0000000000..bb3a865fcb
--- /dev/null
+++ b/src/elf_writer_mclinker.cc
@@ -0,0 +1,394 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "elf_writer_mclinker.h"
+
+#include <llvm/Support/TargetSelect.h>
+
+#include <mcld/Environment.h>
+#include <mcld/IRBuilder.h>
+#include <mcld/Linker.h>
+#include <mcld/LinkerConfig.h>
+#include <mcld/MC/ZOption.h>
+#include <mcld/Module.h>
+#include <mcld/Support/Path.h>
+#include <mcld/Support/TargetSelect.h>
+
+#include "base/unix_file/fd_file.h"
+#include "compiler/driver/compiler_driver.h"
+#include "globals.h"
+
+namespace art {
+
+ElfWriterMclinker::ElfWriterMclinker(const CompilerDriver& driver, File* elf_file)
+ : ElfWriter(driver, elf_file), oat_input_(NULL) {}
+
+ElfWriterMclinker::~ElfWriterMclinker() {}
+
+bool ElfWriterMclinker::Create(File* elf_file,
+ std::vector<uint8_t>& oat_contents,
+ const std::vector<const DexFile*>& dex_files,
+ const std::string& android_root,
+ bool is_host,
+ const CompilerDriver& driver) {
+ ElfWriterMclinker elf_writer(driver, elf_file);
+ return elf_writer.Write(oat_contents, dex_files, android_root, is_host);
+}
+
+bool ElfWriterMclinker::Write(std::vector<uint8_t>& oat_contents,
+ const std::vector<const DexFile*>& dex_files,
+ const std::string& android_root,
+ bool is_host) {
+ Init();
+ AddOatInput(oat_contents);
+#if defined(ART_USE_PORTABLE_COMPILER)
+ AddMethodInputs(dex_files);
+ AddRuntimeInputs(android_root, is_host);
+#endif
+ if (!Link()) {
+ return false;
+ }
+#if defined(ART_USE_PORTABLE_COMPILER)
+ FixupOatMethodOffsets(dex_files);
+#endif
+ return true;
+}
+
+static void InitializeLLVM() {
+ // TODO: this is lifted from art's compiler_llvm.cc, should be factored out
+ if (kIsTargetBuild) {
+ llvm::InitializeNativeTarget();
+ // TODO: odd that there is no InitializeNativeTargetMC?
+ } else {
+ llvm::InitializeAllTargets();
+ llvm::InitializeAllTargetMCs();
+ }
+}
+
+void ElfWriterMclinker::Init() {
+ std::string target_triple;
+ std::string target_cpu;
+ std::string target_attr;
+ CompilerDriver::InstructionSetToLLVMTarget(compiler_driver_->GetInstructionSet(),
+ target_triple,
+ target_cpu,
+ target_attr);
+
+ // Based on mclinker's llvm-mcld.cpp main() and LinkerTest
+ //
+ // TODO: LinkerTest uses mcld::Initialize(), but it does an
+ // llvm::InitializeAllTargets, which we don't want. Basically we
+ // want mcld::InitializeNative, but it doesn't exist yet, so we
+ // inline the minimal we need here.
+ InitializeLLVM();
+ mcld::InitializeAllTargets();
+ mcld::InitializeAllLinkers();
+ mcld::InitializeAllEmulations();
+ mcld::InitializeAllDiagnostics();
+
+ linker_config_.reset(new mcld::LinkerConfig(target_triple));
+ CHECK(linker_config_.get() != NULL);
+ linker_config_->setCodeGenType(mcld::LinkerConfig::DynObj);
+ linker_config_->options().setSOName(elf_file_->GetPath());
+
+ // error on undefined symbols.
+ // TODO: should this just be set if kIsDebugBuild?
+ linker_config_->options().setNoUndefined(true);
+
+ if (compiler_driver_->GetInstructionSet() == kMips) {
+ // MCLinker defaults MIPS section alignment to 0x10000, not
+ // 0x1000. The ABI says this is because the max page size is
+ // general is 64k but that isn't true on Android.
+ mcld::ZOption z_option;
+ z_option.setKind(mcld::ZOption::MaxPageSize);
+ z_option.setPageSize(kPageSize);
+ linker_config_->options().addZOption(z_option);
+ }
+
+ // TODO: Wire up mcld DiagnosticEngine to LOG?
+ linker_config_->options().setColor(false);
+ if (false) {
+ // enables some tracing of input file processing
+ linker_config_->options().setTrace(true);
+ }
+
+ // Based on alone::Linker::config
+ module_.reset(new mcld::Module(linker_config_->options().soname()));
+ CHECK(module_.get() != NULL);
+ ir_builder_.reset(new mcld::IRBuilder(*module_.get(), *linker_config_.get()));
+ CHECK(ir_builder_.get() != NULL);
+ linker_.reset(new mcld::Linker());
+ CHECK(linker_.get() != NULL);
+ linker_->config(*linker_config_.get());
+}
+
+void ElfWriterMclinker::AddOatInput(std::vector<uint8_t>& oat_contents) {
+ // Add an artificial memory input. Based on LinkerTest.
+ UniquePtr<OatFile> oat_file(OatFile::OpenMemory(oat_contents, elf_file_->GetPath()));
+ CHECK(oat_file.get() != NULL) << elf_file_->GetPath();
+
+ const char* oat_data_start = reinterpret_cast<const char*>(&oat_file->GetOatHeader());
+ const size_t oat_data_length = oat_file->GetOatHeader().GetExecutableOffset();
+ const char* oat_code_start = oat_data_start + oat_data_length;
+ const size_t oat_code_length = oat_file->Size() - oat_data_length;
+
+ // TODO: ownership of oat_input?
+ oat_input_ = ir_builder_->CreateInput("oat contents",
+ mcld::sys::fs::Path("oat contents path"),
+ mcld::Input::Object);
+ CHECK(oat_input_ != NULL);
+
+ // TODO: ownership of null_section?
+ mcld::LDSection* null_section = ir_builder_->CreateELFHeader(*oat_input_,
+ "",
+ mcld::LDFileFormat::Null,
+ llvm::ELF::SHT_NULL,
+ 0);
+ CHECK(null_section != NULL);
+
+ // TODO: we should split readonly data from readonly executable
+ // code like .oat does. We need to control section layout with
+ // linker script like functionality to guarantee references
+ // between sections maintain relative position which isn't
+ // possible right now with the mclinker APIs.
+ CHECK(oat_code_start != NULL);
+
+ // we need to ensure that oatdata is page aligned so when we
+ // fixup the segment load addresses, they remain page aligned.
+ uint32_t alignment = kPageSize;
+
+ // TODO: ownership of text_section?
+ mcld::LDSection* text_section = ir_builder_->CreateELFHeader(*oat_input_,
+ ".text",
+ llvm::ELF::SHT_PROGBITS,
+ llvm::ELF::SHF_EXECINSTR
+ | llvm::ELF::SHF_ALLOC,
+ alignment);
+ CHECK(text_section != NULL);
+
+ mcld::SectionData* text_sectiondata = ir_builder_->CreateSectionData(*text_section);
+ CHECK(text_sectiondata != NULL);
+
+ // TODO: why does IRBuilder::CreateRegion take a non-const pointer?
+ mcld::Fragment* text_fragment = ir_builder_->CreateRegion(const_cast<char*>(oat_data_start),
+ oat_file->Size());
+ CHECK(text_fragment != NULL);
+ ir_builder_->AppendFragment(*text_fragment, *text_sectiondata);
+
+ ir_builder_->AddSymbol(*oat_input_,
+ "oatdata",
+ mcld::ResolveInfo::Object,
+ mcld::ResolveInfo::Define,
+ mcld::ResolveInfo::Global,
+ oat_data_length, // size
+ 0, // offset
+ text_section);
+
+ ir_builder_->AddSymbol(*oat_input_,
+ "oatexec",
+ mcld::ResolveInfo::Function,
+ mcld::ResolveInfo::Define,
+ mcld::ResolveInfo::Global,
+ oat_code_length, // size
+ oat_data_length, // offset
+ text_section);
+
+ ir_builder_->AddSymbol(*oat_input_,
+ "oatlastword",
+ mcld::ResolveInfo::Object,
+ mcld::ResolveInfo::Define,
+ mcld::ResolveInfo::Global,
+ 0, // size
+ // subtract a word so symbol is within section
+ (oat_data_length + oat_code_length) - sizeof(uint32_t), // offset
+ text_section);
+}
+
+#if defined(ART_USE_PORTABLE_COMPILER)
+void ElfWriterMclinker::AddMethodInputs(const std::vector<const DexFile*>& dex_files) {
+ DCHECK(oat_input_ != NULL);
+
+ DexMethodIterator it(dex_files);
+ while (it.HasNext()) {
+ const DexFile& dex_file = it.GetDexFile();
+ uint32_t method_idx = it.GetMemberIndex();
+ const CompiledMethod* compiled_method =
+ compiler_driver_->GetCompiledMethod(CompilerDriver::MethodReference(&dex_file, method_idx));
+ if (compiled_method != NULL) {
+ AddCompiledCodeInput(*compiled_method);
+ }
+ it.Next();
+ }
+ added_symbols_.clear();
+}
+
+void ElfWriterMclinker::AddCompiledCodeInput(const CompiledCode& compiled_code) {
+ // Check if we've seen this compiled code before. If so skip
+ // it. This can happen for reused code such as invoke stubs.
+ const std::string& symbol = compiled_code.GetSymbol();
+ SafeMap<const std::string*, const std::string*>::iterator it = added_symbols_.find(&symbol);
+ if (it != added_symbols_.end()) {
+ return;
+ }
+ added_symbols_.Put(&symbol, &symbol);
+
+ // Add input to supply code for symbol
+ const std::vector<uint8_t>& code = compiled_code.GetCode();
+ // TODO: ownership of code_input?
+ // TODO: why does IRBuilder::ReadInput take a non-const pointer?
+ mcld::Input* code_input = ir_builder_->ReadInput(symbol,
+ const_cast<uint8_t*>(&code[0]),
+ code.size());
+ CHECK(code_input != NULL);
+}
+
+void ElfWriterMclinker::AddRuntimeInputs(const std::string& android_root, bool is_host) {
+ std::string libart_so(android_root);
+ libart_so += kIsDebugBuild ? "/lib/libartd.so" : "/lib/libart.so";
+ // TODO: ownership of libart_so_input?
+ mcld::Input* libart_so_input = ir_builder_->ReadInput(libart_so, libart_so);
+ CHECK(libart_so_input != NULL);
+
+ std::string host_prebuilt_dir("prebuilts/gcc/linux-x86/host/i686-linux-glibc2.7-4.6");
+
+ std::string compiler_runtime_lib;
+ if (is_host) {
+ compiler_runtime_lib += host_prebuilt_dir;
+ compiler_runtime_lib += "/lib/gcc/i686-linux/4.6.x-google/libgcc.a";
+ } else {
+ compiler_runtime_lib += android_root;
+ compiler_runtime_lib += "/lib/libcompiler_rt.a";
+ }
+ // TODO: ownership of compiler_runtime_lib_input?
+ mcld::Input* compiler_runtime_lib_input = ir_builder_->ReadInput(compiler_runtime_lib,
+ compiler_runtime_lib);
+ CHECK(compiler_runtime_lib_input != NULL);
+
+ std::string libc_lib;
+ if (is_host) {
+ libc_lib += host_prebuilt_dir;
+ libc_lib += "/sysroot/usr/lib/libc.so.6";
+ } else {
+ libc_lib += android_root;
+ libc_lib += "/lib/libc.so";
+ }
+ // TODO: ownership of libc_lib_input?
+ mcld::Input* libc_lib_input_input = ir_builder_->ReadInput(libc_lib, libc_lib);
+ CHECK(libc_lib_input_input != NULL);
+
+ std::string libm_lib;
+ if (is_host) {
+ libm_lib += host_prebuilt_dir;
+ libm_lib += "/sysroot/usr/lib/libm.so";
+ } else {
+ libm_lib += android_root;
+ libm_lib += "/lib/libm.so";
+ }
+ // TODO: ownership of libm_lib_input?
+ mcld::Input* libm_lib_input_input = ir_builder_->ReadInput(libm_lib, libm_lib);
+ CHECK(libm_lib_input_input != NULL);
+
+}
+#endif
+
+bool ElfWriterMclinker::Link() {
+ // link inputs
+ if (!linker_->link(*module_.get(), *ir_builder_.get())) {
+ LOG(ERROR) << "Failed to link " << elf_file_->GetPath();
+ return false;
+ }
+
+ // emit linked output
+ // TODO: avoid dup of fd by fixing Linker::emit to not close the argument fd.
+ int fd = dup(elf_file_->Fd());
+ if (fd == -1) {
+ PLOG(ERROR) << "Failed to dup file descriptor for " << elf_file_->GetPath();
+ return false;
+ }
+ if (!linker_->emit(fd)) {
+ LOG(ERROR) << "Failed to emit " << elf_file_->GetPath();
+ return false;
+ }
+ mcld::Finalize();
+ LOG(INFO) << "ELF file written successfully: " << elf_file_->GetPath();
+ return true;
+}
+
+#if defined(ART_USE_PORTABLE_COMPILER)
+void ElfWriterMclinker::FixupOatMethodOffsets(const std::vector<const DexFile*>& dex_files) {
+ UniquePtr<ElfFile> elf_file(ElfFile::Open(elf_file_, true, false));
+ CHECK(elf_file.get() != NULL) << elf_file_->GetPath();
+
+ llvm::ELF::Elf32_Addr oatdata_address = GetOatDataAddress(elf_file.get());
+ DexMethodIterator it(dex_files);
+ while (it.HasNext()) {
+ const DexFile& dex_file = it.GetDexFile();
+ uint32_t method_idx = it.GetMemberIndex();
+ InvokeType invoke_type = it.GetInvokeType();
+ mirror::AbstractMethod* method = NULL;
+ if (compiler_driver_->IsImage()) {
+ ClassLinker* linker = Runtime::Current()->GetClassLinker();
+ mirror::DexCache* dex_cache = linker->FindDexCache(dex_file);
+ // Unchecked as we hold mutator_lock_ on entry.
+ ScopedObjectAccessUnchecked soa(Thread::Current());
+ method = linker->ResolveMethod(dex_file, method_idx, dex_cache, NULL, NULL, invoke_type);
+ CHECK(method != NULL);
+ }
+ const CompiledMethod* compiled_method =
+ compiler_driver_->GetCompiledMethod(CompilerDriver::MethodReference(&dex_file, method_idx));
+ if (compiled_method != NULL) {
+ uint32_t offset = FixupCompiledCodeOffset(*elf_file.get(), oatdata_address, *compiled_method);
+ // Don't overwrite static method trampoline
+ if (method != NULL &&
+ (!method->IsStatic() ||
+ method->IsConstructor() ||
+ method->GetDeclaringClass()->IsInitialized())) {
+ method->SetOatCodeOffset(offset);
+ }
+ }
+ it.Next();
+ }
+ symbol_to_compiled_code_offset_.clear();
+}
+
+uint32_t ElfWriterMclinker::FixupCompiledCodeOffset(ElfFile& elf_file,
+ llvm::ELF::Elf32_Addr oatdata_address,
+ const CompiledCode& compiled_code) {
+ const std::string& symbol = compiled_code.GetSymbol();
+ SafeMap<const std::string*, uint32_t>::iterator it = symbol_to_compiled_code_offset_.find(&symbol);
+ if (it != symbol_to_compiled_code_offset_.end()) {
+ return it->second;
+ }
+
+ llvm::ELF::Elf32_Addr compiled_code_address = elf_file.FindSymbolAddress(llvm::ELF::SHT_SYMTAB,
+ symbol,
+ true);
+ CHECK_NE(0U, compiled_code_address) << symbol;
+ CHECK_LT(oatdata_address, compiled_code_address) << symbol;
+ uint32_t compiled_code_offset = compiled_code_address - oatdata_address;
+ symbol_to_compiled_code_offset_.Put(&symbol, compiled_code_offset);
+
+ const std::vector<uint32_t>& offsets = compiled_code.GetOatdataOffsetsToCompliledCodeOffset();
+ for (uint32_t i = 0; i < offsets.size(); i++) {
+ uint32_t oatdata_offset = oatdata_address + offsets[i];
+ uint32_t* addr = reinterpret_cast<uint32_t*>(elf_file.Begin() + oatdata_offset);
+ *addr = compiled_code_offset;
+ }
+ return compiled_code_offset;
+}
+#endif
+
+} // namespace art
diff --git a/src/elf_writer_mclinker.h b/src/elf_writer_mclinker.h
new file mode 100644
index 0000000000..21f23e113d
--- /dev/null
+++ b/src/elf_writer_mclinker.h
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_SRC_ELF_WRITER_MCLINKER_H_
+#define ART_SRC_ELF_WRITER_MCLINKER_H_
+
+#include "elf_writer.h"
+
+#include "UniquePtr.h"
+#include "safe_map.h"
+
+namespace mcld {
+class IRBuilder;
+class Input;
+class LDSection;
+class LDSymbol;
+class Linker;
+class LinkerConfig;
+class Module;
+} // namespace mcld
+
+namespace art {
+
+class CompiledCode;
+
+class ElfWriterMclinker : public ElfWriter {
+ public:
+
+ // Write an ELF file. Returns true on success, false on failure.
+ static bool Create(File* file,
+ std::vector<uint8_t>& oat_contents,
+ const std::vector<const DexFile*>& dex_files,
+ const std::string& android_root,
+ bool is_host,
+ const CompilerDriver& driver)
+ SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+
+ protected:
+ virtual bool Write(std::vector<uint8_t>& oat_contents,
+ const std::vector<const DexFile*>& dex_files,
+ const std::string& android_root,
+ bool is_host)
+ SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+
+ private:
+ ElfWriterMclinker(const CompilerDriver& driver, File* elf_file);
+ ~ElfWriterMclinker();
+
+ void Init();
+ void AddOatInput(std::vector<uint8_t>& oat_contents);
+ void AddMethodInputs(const std::vector<const DexFile*>& dex_files);
+ void AddCompiledCodeInput(const CompiledCode& compiled_code);
+ void AddRuntimeInputs(const std::string& android_root, bool is_host);
+ bool Link();
+#if defined(ART_USE_PORTABLE_COMPILER)
+ void FixupOatMethodOffsets(const std::vector<const DexFile*>& dex_files)
+ SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+ uint32_t FixupCompiledCodeOffset(ElfFile& elf_file,
+ llvm::ELF::Elf32_Addr oatdata_address,
+ const CompiledCode& compiled_code);
+#endif
+
+ // Setup by Init()
+ UniquePtr<mcld::LinkerConfig> linker_config_;
+ UniquePtr<mcld::Module> module_;
+ UniquePtr<mcld::IRBuilder> ir_builder_;
+ UniquePtr<mcld::Linker> linker_;
+
+ // Setup by AddOatInput()
+ // TODO: ownership of oat_input_?
+ mcld::Input* oat_input_;
+
+ // Setup by AddCompiledCodeInput
+ // set of symbols for already added mcld::Inputs
+ SafeMap<const std::string*, const std::string*> added_symbols_;
+
+ // Setup by FixupCompiledCodeOffset
+ // map of symbol names to oatdata offset
+ SafeMap<const std::string*, uint32_t> symbol_to_compiled_code_offset_;
+
+ DISALLOW_IMPLICIT_CONSTRUCTORS(ElfWriterMclinker);
+};
+
+} // namespace art
+
+#endif // ART_SRC_ELF_WRITER_MCLINKER_H_
diff --git a/src/elf_writer_quick.cc b/src/elf_writer_quick.cc
new file mode 100644
index 0000000000..c3c5415733
--- /dev/null
+++ b/src/elf_writer_quick.cc
@@ -0,0 +1,665 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "elf_writer_quick.h"
+
+#include "base/logging.h"
+#include "base/unix_file/fd_file.h"
+#include "compiler/driver/compiler_driver.h"
+#include "globals.h"
+#include "oat.h"
+#include "utils.h"
+
+namespace art {
+
+ElfWriterQuick::ElfWriterQuick(const CompilerDriver& driver, File* elf_file)
+ : ElfWriter(driver, elf_file) {}
+
+ElfWriterQuick::~ElfWriterQuick() {}
+
+bool ElfWriterQuick::Create(File* elf_file,
+ std::vector<uint8_t>& oat_contents,
+ const std::vector<const DexFile*>& dex_files,
+ const std::string& android_root,
+ bool is_host,
+ const CompilerDriver& driver) {
+ ElfWriterQuick elf_writer(driver, elf_file);
+ return elf_writer.Write(oat_contents, dex_files, android_root, is_host);
+}
+
+bool ElfWriterQuick::Write(std::vector<uint8_t>& oat_contents,
+ const std::vector<const DexFile*>& dex_files_unused,
+ const std::string& android_root_unused,
+ bool is_host_unused) {
+ const bool debug = false;
+ // +-------------------------+
+ // | Elf32_Ehdr |
+ // +-------------------------+
+ // | Elf32_Phdr PHDR |
+ // | Elf32_Phdr LOAD R | .dynsym .dynstr .hash .rodata
+ // | Elf32_Phdr LOAD R X | .text
+ // | Elf32_Phdr LOAD RW | .dynamic
+ // | Elf32_Phdr DYNAMIC | .dynamic
+ // +-------------------------+
+ // | .dynsym |
+ // | Elf32_Sym STN_UNDEF |
+ // | Elf32_Sym oatdata |
+ // | Elf32_Sym oatexec |
+ // | Elf32_Sym oatlastword |
+ // +-------------------------+
+ // | .dynstr |
+ // | \0 |
+ // | oatdata\0 |
+ // | oatexec\0 |
+ // | oatlastword\0 |
+ // | boot.oat\0 |
+ // +-------------------------+
+ // | .hash |
+ // | Elf32_Word nbucket = 1 |
+ // | Elf32_Word nchain = 3 |
+ // | Elf32_Word bucket[0] = 0|
+ // | Elf32_Word chain[0] = 1|
+ // | Elf32_Word chain[1] = 2|
+ // | Elf32_Word chain[2] = 3|
+ // +-------------------------+
+ // | .rodata |
+ // | oatdata..oatexec-4 |
+ // +-------------------------+
+ // | .text |
+ // | oatexec..oatlastword |
+ // +-------------------------+
+ // | .dynamic |
+ // | Elf32_Dyn DT_SONAME |
+ // | Elf32_Dyn DT_HASH |
+ // | Elf32_Dyn DT_SYMTAB |
+ // | Elf32_Dyn DT_SYMENT |
+ // | Elf32_Dyn DT_STRTAB |
+ // | Elf32_Dyn DT_STRSZ |
+ // | Elf32_Dyn DT_NULL |
+ // +-------------------------+
+ // | .shstrtab |
+ // | \0 |
+ // | .dynamic\0 |
+ // | .dynsym\0 |
+ // | .dynstr\0 |
+ // | .hash\0 |
+ // | .rodata\0 |
+ // | .text\0 |
+ // | .shstrtab\0 |
+ // +-------------------------+
+ // | Elf32_Shdr NULL |
+ // | Elf32_Shdr .dynsym |
+ // | Elf32_Shdr .dynstr |
+ // | Elf32_Shdr .hash |
+ // | Elf32_Shdr .text |
+ // | Elf32_Shdr .rodata |
+ // | Elf32_Shdr .dynamic |
+ // | Elf32_Shdr .shstrtab |
+ // +-------------------------+
+
+ // phase 1: computing offsets
+ uint32_t expected_offset = 0;
+
+ // Elf32_Ehdr
+ expected_offset += sizeof(llvm::ELF::Elf32_Ehdr);
+
+ // PHDR
+ uint32_t phdr_alignment = sizeof(llvm::ELF::Elf32_Word);
+ uint32_t phdr_offset = expected_offset;
+ const uint8_t PH_PHDR = 0;
+ const uint8_t PH_LOAD_R__ = 1;
+ const uint8_t PH_LOAD_R_X = 2;
+ const uint8_t PH_LOAD_RW_ = 3;
+ const uint8_t PH_DYNAMIC = 4;
+ const uint8_t PH_NUM = 5;
+ uint32_t phdr_size = sizeof(llvm::ELF::Elf32_Phdr) * PH_NUM;
+ expected_offset += phdr_size;
+ if (debug) {
+ LOG(INFO) << "phdr_offset=" << phdr_offset << std::hex << " " << phdr_offset;
+ LOG(INFO) << "phdr_size=" << phdr_size << std::hex << " " << phdr_size;
+ }
+
+ // .dynsym
+ uint32_t dynsym_alignment = sizeof(llvm::ELF::Elf32_Word);
+ uint32_t dynsym_offset = expected_offset = RoundUp(expected_offset, dynsym_alignment);
+ const uint8_t SYM_UNDEF = 0; // aka STN_UNDEF
+ const uint8_t SYM_OATDATA = 1;
+ const uint8_t SYM_OATEXEC = 2;
+ const uint8_t SYM_OATLASTWORD = 3;
+ const uint8_t SYM_NUM = 4;
+ uint32_t dynsym_size = sizeof(llvm::ELF::Elf32_Sym) * SYM_NUM;
+ expected_offset += dynsym_size;
+ if (debug) {
+ LOG(INFO) << "dynsym_offset=" << dynsym_offset << std::hex << " " << dynsym_offset;
+ LOG(INFO) << "dynsym_size=" << dynsym_size << std::hex << " " << dynsym_size;
+ }
+
+ // .dynstr
+ uint32_t dynstr_alignment = 1;
+ uint32_t dynstr_offset = expected_offset = RoundUp(expected_offset, dynstr_alignment);
+ std::string dynstr;
+ dynstr += '\0';
+ uint32_t dynstr_oatdata_offset = dynstr.size();
+ dynstr += "oatdata";
+ dynstr += '\0';
+ uint32_t dynstr_oatexec_offset = dynstr.size();
+ dynstr += "oatexec";
+ dynstr += '\0';
+ uint32_t dynstr_oatlastword_offset = dynstr.size();
+ dynstr += "oatlastword";
+ dynstr += '\0';
+ uint32_t dynstr_soname_offset = dynstr.size();
+ std::string file_name(elf_file_->GetPath());
+ size_t directory_separator_pos = file_name.rfind('/');
+ if (directory_separator_pos != std::string::npos) {
+ file_name = file_name.substr(directory_separator_pos + 1);
+ }
+ dynstr += file_name;
+ dynstr += '\0';
+ uint32_t dynstr_size = dynstr.size();
+ expected_offset += dynstr_size;
+ if (debug) {
+ LOG(INFO) << "dynstr_offset=" << dynstr_offset << std::hex << " " << dynstr_offset;
+ LOG(INFO) << "dynstr_size=" << dynstr_size << std::hex << " " << dynstr_size;
+ }
+
+ // .hash
+ uint32_t hash_alignment = sizeof(llvm::ELF::Elf32_Word); // Even for 64-bit
+ uint32_t hash_offset = expected_offset = RoundUp(expected_offset, hash_alignment);
+ const uint8_t HASH_NBUCKET = 0;
+ const uint8_t HASH_NCHAIN = 1;
+ const uint8_t HASH_BUCKET0 = 2;
+ const uint8_t HASH_NUM = HASH_BUCKET0 + 1 + SYM_NUM;
+ uint32_t hash_size = sizeof(llvm::ELF::Elf32_Word) * HASH_NUM;
+ expected_offset += hash_size;
+ if (debug) {
+ LOG(INFO) << "hash_offset=" << hash_offset << std::hex << " " << hash_offset;
+ LOG(INFO) << "hash_size=" << hash_size << std::hex << " " << hash_size;
+ }
+
+ // .rodata
+ uint32_t oat_data_alignment = kPageSize;
+ uint32_t oat_data_offset = expected_offset = RoundUp(expected_offset, oat_data_alignment);
+ const OatHeader* oat_header = reinterpret_cast<OatHeader*>(&oat_contents[0]);
+ CHECK(oat_header->IsValid());
+ uint32_t oat_data_size = oat_header->GetExecutableOffset();
+ expected_offset += oat_data_size;
+ if (debug) {
+ LOG(INFO) << "oat_data_offset=" << oat_data_offset << std::hex << " " << oat_data_offset;
+ LOG(INFO) << "oat_data_size=" << oat_data_size << std::hex << " " << oat_data_size;
+ }
+
+ // .text
+ uint32_t oat_exec_alignment = kPageSize;
+ CHECK_ALIGNED(expected_offset, kPageSize);
+ uint32_t oat_exec_offset = expected_offset = RoundUp(expected_offset, oat_exec_alignment);
+ uint32_t oat_exec_size = oat_contents.size() - oat_data_size;
+ expected_offset += oat_exec_size;
+ CHECK_EQ(oat_data_offset + oat_contents.size(), expected_offset);
+ if (debug) {
+ LOG(INFO) << "oat_exec_offset=" << oat_exec_offset << std::hex << " " << oat_exec_offset;
+ LOG(INFO) << "oat_exec_size=" << oat_exec_size << std::hex << " " << oat_exec_size;
+ }
+
+ // .dynamic
+ // alignment would naturally be sizeof(llvm::ELF::Elf32_Word), but we want this in a new segment
+ uint32_t dynamic_alignment = kPageSize;
+ uint32_t dynamic_offset = expected_offset = RoundUp(expected_offset, dynamic_alignment);
+ const uint8_t DH_SONAME = 0;
+ const uint8_t DH_HASH = 1;
+ const uint8_t DH_SYMTAB = 2;
+ const uint8_t DH_SYMENT = 3;
+ const uint8_t DH_STRTAB = 4;
+ const uint8_t DH_STRSZ = 5;
+ const uint8_t DH_NULL = 6;
+ const uint8_t DH_NUM = 7;
+ uint32_t dynamic_size = sizeof(llvm::ELF::Elf32_Dyn) * DH_NUM;
+ expected_offset += dynamic_size;
+ if (debug) {
+ LOG(INFO) << "dynamic_offset=" << dynamic_offset << std::hex << " " << dynamic_offset;
+ LOG(INFO) << "dynamic_size=" << dynamic_size << std::hex << " " << dynamic_size;
+ }
+
+ // .shstrtab
+ uint32_t shstrtab_alignment = 1;
+ uint32_t shstrtab_offset = expected_offset = RoundUp(expected_offset, shstrtab_alignment);
+ std::string shstrtab;
+ shstrtab += '\0';
+ uint32_t shstrtab_dynamic_offset = shstrtab.size();
+ CHECK_EQ(1U, shstrtab_dynamic_offset);
+ shstrtab += ".dynamic";
+ shstrtab += '\0';
+ uint32_t shstrtab_dynsym_offset = shstrtab.size();
+ shstrtab += ".dynsym";
+ shstrtab += '\0';
+ uint32_t shstrtab_dynstr_offset = shstrtab.size();
+ shstrtab += ".dynstr";
+ shstrtab += '\0';
+ uint32_t shstrtab_hash_offset = shstrtab.size();
+ shstrtab += ".hash";
+ shstrtab += '\0';
+ uint32_t shstrtab_rodata_offset = shstrtab.size();
+ shstrtab += ".rodata";
+ shstrtab += '\0';
+ uint32_t shstrtab_text_offset = shstrtab.size();
+ shstrtab += ".text";
+ shstrtab += '\0';
+ uint32_t shstrtab_shstrtab_offset = shstrtab.size();
+ shstrtab += ".shstrtab";
+ shstrtab += '\0';
+ uint32_t shstrtab_size = shstrtab.size();
+ expected_offset += shstrtab_size;
+ if (debug) {
+ LOG(INFO) << "shstrtab_offset=" << shstrtab_offset << std::hex << " " << shstrtab_offset;
+ LOG(INFO) << "shstrtab_size=" << shstrtab_size << std::hex << " " << shstrtab_size;
+ }
+
+ // section headers (after all sections)
+ uint32_t shdr_alignment = sizeof(llvm::ELF::Elf32_Word);
+ uint32_t shdr_offset = expected_offset = RoundUp(expected_offset, shdr_alignment);
+ const uint8_t SH_NULL = 0;
+ const uint8_t SH_DYNSYM = 1;
+ const uint8_t SH_DYNSTR = 2;
+ const uint8_t SH_HASH = 3;
+ const uint8_t SH_RODATA = 4;
+ const uint8_t SH_TEXT = 5;
+ const uint8_t SH_DYNAMIC = 6;
+ const uint8_t SH_SHSTRTAB = 7;
+ const uint8_t SH_NUM = 8;
+ uint32_t shdr_size = sizeof(llvm::ELF::Elf32_Shdr) * SH_NUM;
+ expected_offset += shdr_size;
+ if (debug) {
+ LOG(INFO) << "shdr_offset=" << shdr_offset << std::hex << " " << shdr_offset;
+ LOG(INFO) << "shdr_size=" << shdr_size << std::hex << " " << shdr_size;
+ }
+
+ // phase 2: initializing data
+
+ // Elf32_Ehdr
+ llvm::ELF::Elf32_Ehdr elf_header;
+ memset(&elf_header, 0, sizeof(elf_header));
+ elf_header.e_ident[llvm::ELF::EI_MAG0] = llvm::ELF::ElfMagic[0];
+ elf_header.e_ident[llvm::ELF::EI_MAG1] = llvm::ELF::ElfMagic[1];
+ elf_header.e_ident[llvm::ELF::EI_MAG2] = llvm::ELF::ElfMagic[2];
+ elf_header.e_ident[llvm::ELF::EI_MAG3] = llvm::ELF::ElfMagic[3];
+ elf_header.e_ident[llvm::ELF::EI_CLASS] = llvm::ELF::ELFCLASS32;
+ elf_header.e_ident[llvm::ELF::EI_DATA] = llvm::ELF::ELFDATA2LSB;
+ elf_header.e_ident[llvm::ELF::EI_VERSION] = llvm::ELF::EV_CURRENT;
+ elf_header.e_ident[llvm::ELF::EI_OSABI] = llvm::ELF::ELFOSABI_LINUX;
+ elf_header.e_ident[llvm::ELF::EI_ABIVERSION] = 0;
+ elf_header.e_type = llvm::ELF::ET_DYN;
+ switch (compiler_driver_->GetInstructionSet()) {
+ case kThumb2: {
+ elf_header.e_machine = llvm::ELF::EM_ARM;
+ elf_header.e_flags = llvm::ELF::EF_ARM_EABI_VER5;
+ break;
+ }
+ case kX86: {
+ elf_header.e_machine = llvm::ELF::EM_386;
+ elf_header.e_flags = 0;
+ break;
+ }
+ case kMips: {
+ elf_header.e_machine = llvm::ELF::EM_MIPS;
+ elf_header.e_flags = (llvm::ELF::EF_MIPS_NOREORDER |
+ llvm::ELF::EF_MIPS_PIC |
+ llvm::ELF::EF_MIPS_CPIC |
+ llvm::ELF::EF_MIPS_ABI_O32 |
+ llvm::ELF::EF_MIPS_ARCH_32R2);
+ break;
+ }
+ case kArm:
+ default: {
+ LOG(FATAL) << "Unknown instruction set: " << compiler_driver_->GetInstructionSet();
+ break;
+ }
+ }
+ elf_header.e_version = 1;
+ elf_header.e_entry = 0;
+ elf_header.e_phoff = phdr_offset;
+ elf_header.e_shoff = shdr_offset;
+ elf_header.e_ehsize = sizeof(llvm::ELF::Elf32_Ehdr);
+ elf_header.e_phentsize = sizeof(llvm::ELF::Elf32_Phdr);
+ elf_header.e_phnum = PH_NUM;
+ elf_header.e_shentsize = sizeof(llvm::ELF::Elf32_Shdr);
+ elf_header.e_shnum = SH_NUM;
+ elf_header.e_shstrndx = SH_SHSTRTAB;
+
+ // PHDR
+ llvm::ELF::Elf32_Phdr program_headers[PH_NUM];
+ memset(&program_headers, 0, sizeof(program_headers));
+
+ program_headers[PH_PHDR].p_type = llvm::ELF::PT_PHDR;
+ program_headers[PH_PHDR].p_offset = phdr_offset;
+ program_headers[PH_PHDR].p_vaddr = phdr_offset;
+ program_headers[PH_PHDR].p_paddr = phdr_offset;
+ program_headers[PH_PHDR].p_filesz = sizeof(program_headers);
+ program_headers[PH_PHDR].p_memsz = sizeof(program_headers);
+ program_headers[PH_PHDR].p_flags = llvm::ELF::PF_R;
+ program_headers[PH_PHDR].p_align = phdr_alignment;
+
+ program_headers[PH_LOAD_R__].p_type = llvm::ELF::PT_LOAD;
+ program_headers[PH_LOAD_R__].p_offset = 0;
+ program_headers[PH_LOAD_R__].p_vaddr = 0;
+ program_headers[PH_LOAD_R__].p_paddr = 0;
+ program_headers[PH_LOAD_R__].p_filesz = oat_data_offset + oat_data_size;
+ program_headers[PH_LOAD_R__].p_memsz = oat_data_offset + oat_data_size;
+ program_headers[PH_LOAD_R__].p_flags = llvm::ELF::PF_R;
+ program_headers[PH_LOAD_R__].p_align = oat_data_alignment;
+
+ program_headers[PH_LOAD_R_X].p_type = llvm::ELF::PT_LOAD;
+ program_headers[PH_LOAD_R_X].p_offset = oat_exec_offset;
+ program_headers[PH_LOAD_R_X].p_vaddr = oat_exec_offset;
+ program_headers[PH_LOAD_R_X].p_paddr = oat_exec_offset;
+ program_headers[PH_LOAD_R_X].p_filesz = oat_exec_size;
+ program_headers[PH_LOAD_R_X].p_memsz = oat_exec_size;
+ program_headers[PH_LOAD_R_X].p_flags = llvm::ELF::PF_R | llvm::ELF::PF_X;
+ program_headers[PH_LOAD_R_X].p_align = oat_exec_alignment;
+
+ // TODO: PF_W for DYNAMIC is considered processor specific, do we need it?
+ program_headers[PH_LOAD_RW_].p_type = llvm::ELF::PT_LOAD;
+ program_headers[PH_LOAD_RW_].p_offset = dynamic_offset;
+ program_headers[PH_LOAD_RW_].p_vaddr = dynamic_offset;
+ program_headers[PH_LOAD_RW_].p_paddr = dynamic_offset;
+ program_headers[PH_LOAD_RW_].p_filesz = dynamic_size;
+ program_headers[PH_LOAD_RW_].p_memsz = dynamic_size;
+ program_headers[PH_LOAD_RW_].p_flags = llvm::ELF::PF_R | llvm::ELF::PF_W;
+ program_headers[PH_LOAD_RW_].p_align = dynamic_alignment;
+
+ // TODO: PF_W for DYNAMIC is considered processor specific, do we need it?
+ program_headers[PH_DYNAMIC].p_type = llvm::ELF::PT_DYNAMIC;
+ program_headers[PH_DYNAMIC].p_offset = dynamic_offset;
+ program_headers[PH_DYNAMIC].p_vaddr = dynamic_offset;
+ program_headers[PH_DYNAMIC].p_paddr = dynamic_offset;
+ program_headers[PH_DYNAMIC].p_filesz = dynamic_size;
+ program_headers[PH_DYNAMIC].p_memsz = dynamic_size;
+ program_headers[PH_DYNAMIC].p_flags = llvm::ELF::PF_R | llvm::ELF::PF_W;
+ program_headers[PH_DYNAMIC].p_align = dynamic_alignment;
+
+ // .dynsym
+ llvm::ELF::Elf32_Sym dynsym[SYM_NUM];
+ memset(&dynsym, 0, sizeof(dynsym));
+
+ dynsym[SYM_UNDEF].st_name = 0;
+ dynsym[SYM_UNDEF].st_value = 0;
+ dynsym[SYM_UNDEF].st_size = 0;
+ dynsym[SYM_UNDEF].st_info = 0;
+ dynsym[SYM_UNDEF].st_other = 0;
+ dynsym[SYM_UNDEF].st_shndx = 0;
+
+ dynsym[SYM_OATDATA].st_name = dynstr_oatdata_offset;
+ dynsym[SYM_OATDATA].st_value = oat_data_offset;
+ dynsym[SYM_OATDATA].st_size = oat_data_size;
+ dynsym[SYM_OATDATA].setBindingAndType(llvm::ELF::STB_GLOBAL, llvm::ELF::STT_OBJECT);
+ dynsym[SYM_OATDATA].st_other = llvm::ELF::STV_DEFAULT;
+ dynsym[SYM_OATDATA].st_shndx = SH_RODATA;
+
+ dynsym[SYM_OATEXEC].st_name = dynstr_oatexec_offset;
+ dynsym[SYM_OATEXEC].st_value = oat_exec_offset;
+ dynsym[SYM_OATEXEC].st_size = oat_exec_size;
+ dynsym[SYM_OATEXEC].setBindingAndType(llvm::ELF::STB_GLOBAL, llvm::ELF::STT_OBJECT);
+ dynsym[SYM_OATEXEC].st_other = llvm::ELF::STV_DEFAULT;
+ dynsym[SYM_OATEXEC].st_shndx = SH_TEXT;
+
+ dynsym[SYM_OATLASTWORD].st_name = dynstr_oatlastword_offset;
+ dynsym[SYM_OATLASTWORD].st_value = oat_exec_offset + oat_exec_size - 4;
+ dynsym[SYM_OATLASTWORD].st_size = 4;
+ dynsym[SYM_OATLASTWORD].setBindingAndType(llvm::ELF::STB_GLOBAL, llvm::ELF::STT_OBJECT);
+ dynsym[SYM_OATLASTWORD].st_other = llvm::ELF::STV_DEFAULT;
+ dynsym[SYM_OATLASTWORD].st_shndx = SH_TEXT;
+
+ // .dynstr initialized above as dynstr
+
+ // .hash
+ llvm::ELF::Elf32_Word hash[HASH_NUM]; // Note this is Elf32_Word even on 64-bit
+ hash[HASH_NBUCKET] = 1;
+ hash[HASH_NCHAIN] = SYM_NUM;
+ hash[HASH_BUCKET0] = SYM_OATDATA;
+ hash[HASH_BUCKET0 + 1 + SYM_UNDEF] = SYM_UNDEF;
+ hash[HASH_BUCKET0 + 1 + SYM_OATDATA] = SYM_OATEXEC;
+ hash[HASH_BUCKET0 + 1 + SYM_OATEXEC] = SYM_OATLASTWORD;
+ hash[HASH_BUCKET0 + 1 + SYM_OATLASTWORD] = SYM_UNDEF;
+
+ // .rodata and .text content come from oat_contents
+
+ // .dynamic
+ llvm::ELF::Elf32_Dyn dynamic_headers[DH_NUM];
+ memset(&dynamic_headers, 0, sizeof(dynamic_headers));
+
+ dynamic_headers[DH_SONAME].d_tag = llvm::ELF::DT_SONAME;
+ dynamic_headers[DH_SONAME].d_un.d_val = dynstr_soname_offset;
+
+ dynamic_headers[DH_HASH].d_tag = llvm::ELF::DT_HASH;
+ dynamic_headers[DH_HASH].d_un.d_ptr = hash_offset;
+
+ dynamic_headers[DH_SYMTAB].d_tag = llvm::ELF::DT_SYMTAB;
+ dynamic_headers[DH_SYMTAB].d_un.d_ptr = dynsym_offset;
+
+ dynamic_headers[DH_SYMENT].d_tag = llvm::ELF::DT_SYMENT;
+ dynamic_headers[DH_SYMENT].d_un.d_val = sizeof(llvm::ELF::Elf32_Sym);
+
+ dynamic_headers[DH_STRTAB].d_tag = llvm::ELF::DT_STRTAB;
+ dynamic_headers[DH_STRTAB].d_un.d_ptr = dynstr_offset;
+
+ dynamic_headers[DH_STRSZ].d_tag = llvm::ELF::DT_STRSZ;
+ dynamic_headers[DH_STRSZ].d_un.d_val = dynstr_size;
+
+ dynamic_headers[DH_NULL].d_tag = llvm::ELF::DT_NULL;
+ dynamic_headers[DH_NULL].d_un.d_val = 0;
+
+ // .shstrtab initialized above as shstrtab
+
+ // section headers (after all sections)
+ llvm::ELF::Elf32_Shdr section_headers[SH_NUM];
+ memset(&section_headers, 0, sizeof(section_headers));
+
+ section_headers[SH_NULL].sh_name = 0;
+ section_headers[SH_NULL].sh_type = llvm::ELF::SHT_NULL;
+ section_headers[SH_NULL].sh_flags = 0;
+ section_headers[SH_NULL].sh_addr = 0;
+ section_headers[SH_NULL].sh_offset = 0;
+ section_headers[SH_NULL].sh_size = 0;
+ section_headers[SH_NULL].sh_link = 0;
+ section_headers[SH_NULL].sh_info = 0;
+ section_headers[SH_NULL].sh_addralign = 0;
+ section_headers[SH_NULL].sh_entsize = 0;
+
+ section_headers[SH_DYNSYM].sh_name = shstrtab_dynsym_offset;
+ section_headers[SH_DYNSYM].sh_type = llvm::ELF::SHT_DYNSYM;
+ section_headers[SH_DYNSYM].sh_flags = llvm::ELF::SHF_ALLOC;
+ section_headers[SH_DYNSYM].sh_addr = dynsym_offset;
+ section_headers[SH_DYNSYM].sh_offset = dynsym_offset;
+ section_headers[SH_DYNSYM].sh_size = dynsym_size;
+ section_headers[SH_DYNSYM].sh_link = SH_DYNSTR;
+ section_headers[SH_DYNSYM].sh_info = 1; // 1 because we have not STB_LOCAL symbols
+ section_headers[SH_DYNSYM].sh_addralign = dynsym_alignment;
+ section_headers[SH_DYNSYM].sh_entsize = sizeof(llvm::ELF::Elf32_Sym);
+
+ section_headers[SH_DYNSTR].sh_name = shstrtab_dynstr_offset;
+ section_headers[SH_DYNSTR].sh_type = llvm::ELF::SHT_STRTAB;
+ section_headers[SH_DYNSTR].sh_flags = llvm::ELF::SHF_ALLOC;
+ section_headers[SH_DYNSTR].sh_addr = dynstr_offset;
+ section_headers[SH_DYNSTR].sh_offset = dynstr_offset;
+ section_headers[SH_DYNSTR].sh_size = dynstr_size;
+ section_headers[SH_DYNSTR].sh_link = 0;
+ section_headers[SH_DYNSTR].sh_info = 0;
+ section_headers[SH_DYNSTR].sh_addralign = dynstr_alignment;
+ section_headers[SH_DYNSTR].sh_entsize = 0;
+
+ section_headers[SH_HASH].sh_name = shstrtab_hash_offset;
+ section_headers[SH_HASH].sh_type = llvm::ELF::SHT_HASH;
+ section_headers[SH_HASH].sh_flags = llvm::ELF::SHF_ALLOC;
+ section_headers[SH_HASH].sh_addr = hash_offset;
+ section_headers[SH_HASH].sh_offset = hash_offset;
+ section_headers[SH_HASH].sh_size = hash_size;
+ section_headers[SH_HASH].sh_link = SH_DYNSYM;
+ section_headers[SH_HASH].sh_info = 0;
+ section_headers[SH_HASH].sh_addralign = hash_alignment;
+ section_headers[SH_HASH].sh_entsize = sizeof(llvm::ELF::Elf32_Word); // This is Elf32_Word even on 64-bit
+
+ section_headers[SH_RODATA].sh_name = shstrtab_rodata_offset;
+ section_headers[SH_RODATA].sh_type = llvm::ELF::SHT_PROGBITS;
+ section_headers[SH_RODATA].sh_flags = llvm::ELF::SHF_ALLOC;
+ section_headers[SH_RODATA].sh_addr = oat_data_offset;
+ section_headers[SH_RODATA].sh_offset = oat_data_offset;
+ section_headers[SH_RODATA].sh_size = oat_data_size;
+ section_headers[SH_RODATA].sh_link = 0;
+ section_headers[SH_RODATA].sh_info = 0;
+ section_headers[SH_RODATA].sh_addralign = oat_data_alignment;
+ section_headers[SH_RODATA].sh_entsize = 0;
+
+ section_headers[SH_TEXT].sh_name = shstrtab_text_offset;
+ section_headers[SH_TEXT].sh_type = llvm::ELF::SHT_PROGBITS;
+ section_headers[SH_TEXT].sh_flags = llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_EXECINSTR;
+ section_headers[SH_TEXT].sh_addr = oat_exec_offset;
+ section_headers[SH_TEXT].sh_offset = oat_exec_offset;
+ section_headers[SH_TEXT].sh_size = oat_exec_size;
+ section_headers[SH_TEXT].sh_link = 0;
+ section_headers[SH_TEXT].sh_info = 0;
+ section_headers[SH_TEXT].sh_addralign = oat_exec_alignment;
+ section_headers[SH_TEXT].sh_entsize = 0;
+
+ // TODO: SHF_WRITE for .dynamic is considered processor specific, do we need it?
+ section_headers[SH_DYNAMIC].sh_name = shstrtab_dynamic_offset;
+ section_headers[SH_DYNAMIC].sh_type = llvm::ELF::SHT_DYNAMIC;
+ section_headers[SH_DYNAMIC].sh_flags = llvm::ELF::SHF_WRITE | llvm::ELF::SHF_ALLOC;
+ section_headers[SH_DYNAMIC].sh_addr = dynamic_offset;
+ section_headers[SH_DYNAMIC].sh_offset = dynamic_offset;
+ section_headers[SH_DYNAMIC].sh_size = dynamic_size;
+ section_headers[SH_DYNAMIC].sh_link = SH_DYNSTR;
+ section_headers[SH_DYNAMIC].sh_info = 0;
+ section_headers[SH_DYNAMIC].sh_addralign = dynamic_alignment;
+ section_headers[SH_DYNAMIC].sh_entsize = sizeof(llvm::ELF::Elf32_Dyn);
+
+ section_headers[SH_SHSTRTAB].sh_name = shstrtab_shstrtab_offset;
+ section_headers[SH_SHSTRTAB].sh_type = llvm::ELF::SHT_STRTAB;
+ section_headers[SH_SHSTRTAB].sh_flags = 0;
+ section_headers[SH_SHSTRTAB].sh_addr = shstrtab_offset;
+ section_headers[SH_SHSTRTAB].sh_offset = shstrtab_offset;
+ section_headers[SH_SHSTRTAB].sh_size = shstrtab_size;
+ section_headers[SH_SHSTRTAB].sh_link = 0;
+ section_headers[SH_SHSTRTAB].sh_info = 0;
+ section_headers[SH_SHSTRTAB].sh_addralign = shstrtab_alignment;
+ section_headers[SH_SHSTRTAB].sh_entsize = 0;
+
+ // phase 3: writing file
+
+ // Elf32_Ehdr
+ if (!elf_file_->WriteFully(&elf_header, sizeof(elf_header))) {
+ PLOG(ERROR) << "Failed to write ELF header for " << elf_file_->GetPath();
+ return false;
+ }
+
+ // PHDR
+ if (static_cast<off_t>(phdr_offset) != lseek(elf_file_->Fd(), 0, SEEK_CUR)) {
+ PLOG(ERROR) << "Failed to be at expected ELF program header offset phdr_offset "
+ << " for " << elf_file_->GetPath();
+ return false;
+ }
+ if (!elf_file_->WriteFully(program_headers, sizeof(program_headers))) {
+ PLOG(ERROR) << "Failed to write ELF program headers for " << elf_file_->GetPath();
+ return false;
+ }
+
+ // .dynsym
+ DCHECK_LE(phdr_offset + phdr_size, dynsym_offset);
+ if (static_cast<off_t>(dynsym_offset) != lseek(elf_file_->Fd(), dynsym_offset, SEEK_SET)) {
+ PLOG(ERROR) << "Failed to seek to .dynsym offset location " << dynsym_offset
+ << " for " << elf_file_->GetPath();
+ return false;
+ }
+ if (!elf_file_->WriteFully(dynsym, sizeof(dynsym))) {
+ PLOG(ERROR) << "Failed to write .dynsym for " << elf_file_->GetPath();
+ return false;
+ }
+
+ // .dynstr
+ DCHECK_LE(dynsym_offset + dynsym_size, dynstr_offset);
+ if (static_cast<off_t>(dynstr_offset) != lseek(elf_file_->Fd(), dynstr_offset, SEEK_SET)) {
+ PLOG(ERROR) << "Failed to seek to .dynstr offset " << dynstr_offset
+ << " for " << elf_file_->GetPath();
+ return false;
+ }
+ if (!elf_file_->WriteFully(&dynstr[0], dynsym_size)) {
+ PLOG(ERROR) << "Failed to write .dynsym for " << elf_file_->GetPath();
+ return false;
+ }
+
+ // .hash
+ DCHECK_LE(dynstr_offset + dynstr_size, hash_offset);
+ if (static_cast<off_t>(hash_offset) != lseek(elf_file_->Fd(), hash_offset, SEEK_SET)) {
+ PLOG(ERROR) << "Failed to seek to .hash offset " << hash_offset
+ << " for " << elf_file_->GetPath();
+ return false;
+ }
+ if (!elf_file_->WriteFully(hash, sizeof(hash))) {
+ PLOG(ERROR) << "Failed to write .dynsym for " << elf_file_->GetPath();
+ return false;
+ }
+
+ // .rodata .text
+ DCHECK_LE(hash_offset + hash_size, oat_data_offset);
+ if (static_cast<off_t>(oat_data_offset) != lseek(elf_file_->Fd(), oat_data_offset, SEEK_SET)) {
+ PLOG(ERROR) << "Failed to seek to .rodata offset " << oat_data_offset
+ << " for " << elf_file_->GetPath();
+ return false;
+ }
+ if (!elf_file_->WriteFully(&oat_contents[0], oat_contents.size())) {
+ PLOG(ERROR) << "Failed to write .rodata and .text for " << elf_file_->GetPath();
+ return false;
+ }
+
+ // .dynamic
+ DCHECK_LE(oat_data_offset + oat_contents.size(), dynamic_offset);
+ if (static_cast<off_t>(dynamic_offset) != lseek(elf_file_->Fd(), dynamic_offset, SEEK_SET)) {
+ PLOG(ERROR) << "Failed to seek to .dynamic offset " << dynamic_offset
+ << " for " << elf_file_->GetPath();
+ return false;
+ }
+ if (!elf_file_->WriteFully(&dynamic_headers[0], dynamic_size)) {
+ PLOG(ERROR) << "Failed to write .dynamic for " << elf_file_->GetPath();
+ return false;
+ }
+
+ // .shstrtab
+ DCHECK_LE(dynamic_offset + dynamic_size, shstrtab_offset);
+ if (static_cast<off_t>(shstrtab_offset) != lseek(elf_file_->Fd(), shstrtab_offset, SEEK_SET)) {
+ PLOG(ERROR) << "Failed to seek to .shstrtab offset " << shstrtab_offset
+ << " for " << elf_file_->GetPath();
+ return false;
+ }
+ if (!elf_file_->WriteFully(&shstrtab[0], shstrtab_size)) {
+ PLOG(ERROR) << "Failed to write .shstrtab for " << elf_file_->GetPath();
+ return false;
+ }
+
+ // section headers (after all sections)
+ DCHECK_LE(shstrtab_offset + shstrtab_size, shdr_offset);
+ if (static_cast<off_t>(shdr_offset) != lseek(elf_file_->Fd(), shdr_offset, SEEK_SET)) {
+ PLOG(ERROR) << "Failed to seek to ELF section headers offset " << shdr_offset
+ << " for " << elf_file_->GetPath();
+ return false;
+ }
+ if (!elf_file_->WriteFully(section_headers, sizeof(section_headers))) {
+ PLOG(ERROR) << "Failed to write ELF section headers for " << elf_file_->GetPath();
+ return false;
+ }
+
+ LOG(INFO) << "ELF file written successfully: " << elf_file_->GetPath();
+ return true;
+}
+
+} // namespace art
diff --git a/src/elf_writer_quick.h b/src/elf_writer_quick.h
new file mode 100644
index 0000000000..a1a386b3d7
--- /dev/null
+++ b/src/elf_writer_quick.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_SRC_ELF_WRITER_MCLINKER_H_
+#define ART_SRC_ELF_WRITER_MCLINKER_H_
+
+#include "elf_writer.h"
+
+namespace art {
+
+class ElfWriterQuick : public ElfWriter {
+ public:
+ // Write an ELF file. Returns true on success, false on failure.
+ static bool Create(File* file,
+ std::vector<uint8_t>& oat_contents,
+ const std::vector<const DexFile*>& dex_files,
+ const std::string& android_root,
+ bool is_host,
+ const CompilerDriver& driver)
+ SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+
+ protected:
+ virtual bool Write(std::vector<uint8_t>& oat_contents,
+ const std::vector<const DexFile*>& dex_files,
+ const std::string& android_root,
+ bool is_host)
+ SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+
+ private:
+ ElfWriterQuick(const CompilerDriver& driver, File* elf_file);
+ ~ElfWriterQuick();
+
+ DISALLOW_IMPLICIT_CONSTRUCTORS(ElfWriterQuick);
+};
+
+} // namespace art
+
+#endif // ART_SRC_ELF_WRITER_MCLINKER_H_
diff --git a/src/elf_writer_test.cc b/src/elf_writer_test.cc
index a47bc7175a..d4486d2c56 100644
--- a/src/elf_writer_test.cc
+++ b/src/elf_writer_test.cc
@@ -31,21 +31,10 @@ class ElfWriterTest : public CommonTest {
};
#define EXPECT_ELF_FILE_ADDRESS(ef, value, name, build_map) \
- EXPECT_EQ(value, reinterpret_cast<void*>(ef->FindSymbolAddress(::llvm::ELF::SHT_SYMTAB, name, build_map))); \
EXPECT_EQ(value, reinterpret_cast<void*>(ef->FindSymbolAddress(::llvm::ELF::SHT_DYNSYM, name, build_map))); \
EXPECT_EQ(value, ef->FindDynamicSymbolAddress(name)); \
-/*
- * TODO: Reenable dlopen when it works again on MIPS. It may have broken from this change:
- * commit 818d98eb563ad5d7293b8b5c40f3dabf745e611f
- * Author: Brian Carlstrom <bdc@google.com>
- * Date: Sun Feb 10 21:38:12 2013 -0800
- *
- * Fix MIPS to use standard kPageSize=0x1000 section alignment for ELF sections
- *
- * Change-Id: I905f0c5f75921a65bd7426a54d6258c780d85d0e
- */
-TEST_F(ElfWriterTest, DISABLED_dlsym) {
+TEST_F(ElfWriterTest, dlsym) {
std::string elf_filename;
if (IsHost()) {
const char* host_dir = getenv("ANDROID_HOST_OUT");
diff --git a/src/oat_file.cc b/src/oat_file.cc
index 414813c34e..7bbf94cbab 100644
--- a/src/oat_file.cc
+++ b/src/oat_file.cc
@@ -346,8 +346,7 @@ const OatFile::OatMethod OatFile::OatClass::GetOatMethod(uint32_t method_index)
oat_method_offsets.fp_spill_mask_,
oat_method_offsets.mapping_table_offset_,
oat_method_offsets.vmap_table_offset_,
- oat_method_offsets.gc_map_offset_
- );
+ oat_method_offsets.gc_map_offset_);
}
OatFile::OatMethod::OatMethod(const byte* base,
@@ -357,8 +356,7 @@ OatFile::OatMethod::OatMethod(const byte* base,
const uint32_t fp_spill_mask,
const uint32_t mapping_table_offset,
const uint32_t vmap_table_offset,
- const uint32_t gc_map_offset
- )
+ const uint32_t gc_map_offset)
: begin_(base),
code_offset_(code_offset),
frame_size_in_bytes_(frame_size_in_bytes),
diff --git a/src/oat_file.h b/src/oat_file.h
index 80a2920c8f..46aad4ffd1 100644
--- a/src/oat_file.h
+++ b/src/oat_file.h
@@ -115,8 +115,7 @@ class OatFile {
const uint32_t fp_spill_mask,
const uint32_t mapping_table_offset,
const uint32_t vmap_table_offset,
- const uint32_t gc_map_offset
- );
+ const uint32_t gc_map_offset);
private:
template<class T>
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-10-22 01:54:17 +0000