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authorDavid Meyer <pdox@google.com>2012-03-01 22:19:54 +0000
committerDavid Meyer <pdox@google.com>2012-03-01 22:19:54 +0000
commit97f7787bfb56ad31fe20ec0bb9c3c9f3253d14fb (patch)
tree6a3c615a02060ec4f77b81f1ca36800c97f6b2d8 /include
parentb0578512c79134136e8b53c62a8677ab8e600be2 (diff)
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[Object]
Add ObjectFile::getLoadName() for retrieving the soname/installname of a shared object. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151845 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
-rw-r--r--include/llvm/Object/COFF.h1
-rw-r--r--include/llvm/Object/ELF.h33
-rw-r--r--include/llvm/Object/MachO.h1
-rw-r--r--include/llvm/Object/ObjectFile.h5
4 files changed, 39 insertions, 1 deletions
diff --git a/include/llvm/Object/COFF.h b/include/llvm/Object/COFF.h
index 6212785..4f90187 100644
--- a/include/llvm/Object/COFF.h
+++ b/include/llvm/Object/COFF.h
@@ -164,6 +164,7 @@ public:
virtual uint8_t getBytesInAddress() const;
virtual StringRef getFileFormatName() const;
virtual unsigned getArch() const;
+ virtual StringRef getLoadName() const;
error_code getHeader(const coff_file_header *&Res) const;
error_code getSection(int32_t index, const coff_section *&Res) const;
diff --git a/include/llvm/Object/ELF.h b/include/llvm/Object/ELF.h
index ce002f2..e746b0a 100644
--- a/include/llvm/Object/ELF.h
+++ b/include/llvm/Object/ELF.h
@@ -369,6 +369,9 @@ private:
DenseMap<const Elf_Sym*, ELF::Elf64_Word> ExtendedSymbolTable;
const Elf_Shdr *dot_dynamic_sec; // .dynamic
+ // Pointer to SONAME entry in dynamic string table
+ // This is set the first time getLoadName is called.
+ mutable const char *dt_soname;
/// @brief Map sections to an array of relocation sections that reference
/// them sorted by section index.
@@ -471,6 +474,7 @@ public:
virtual uint8_t getBytesInAddress() const;
virtual StringRef getFileFormatName() const;
virtual unsigned getArch() const;
+ virtual StringRef getLoadName() const;
uint64_t getNumSections() const;
uint64_t getStringTableIndex() const;
@@ -1259,7 +1263,8 @@ ELFObjectFile<target_endianness, is64Bits>::ELFObjectFile(MemoryBuffer *Object
, dot_shstrtab_sec(0)
, dot_strtab_sec(0)
, dot_dynstr_sec(0)
- , dot_dynamic_sec(0) {
+ , dot_dynamic_sec(0)
+ , dt_soname(0) {
const uint64_t FileSize = Data->getBufferSize();
@@ -1486,6 +1491,32 @@ error_code ELFObjectFile<target_endianness, is64Bits>
}
template<support::endianness target_endianness, bool is64Bits>
+StringRef
+ELFObjectFile<target_endianness, is64Bits>::getLoadName() const {
+ if (!dt_soname) {
+ // Find the DT_SONAME entry
+ dyn_iterator it = begin_dynamic_table();
+ dyn_iterator ie = end_dynamic_table();
+ error_code ec;
+ while (it != ie) {
+ if (it->getTag() == ELF::DT_SONAME)
+ break;
+ it.increment(ec);
+ if (ec)
+ report_fatal_error("dynamic table iteration failed");
+ }
+ if (it != ie) {
+ if (dot_dynstr_sec == NULL)
+ report_fatal_error("Dynamic string table is missing");
+ dt_soname = getString(dot_dynstr_sec, it->getVal());
+ } else {
+ dt_soname = "";
+ }
+ }
+ return dt_soname;
+}
+
+template<support::endianness target_endianness, bool is64Bits>
library_iterator ELFObjectFile<target_endianness, is64Bits>
::begin_libraries_needed() const {
// Find the first DT_NEEDED entry
diff --git a/include/llvm/Object/MachO.h b/include/llvm/Object/MachO.h
index 185df06..1aae85a 100644
--- a/include/llvm/Object/MachO.h
+++ b/include/llvm/Object/MachO.h
@@ -42,6 +42,7 @@ public:
virtual uint8_t getBytesInAddress() const;
virtual StringRef getFileFormatName() const;
virtual unsigned getArch() const;
+ virtual StringRef getLoadName() const;
MachOObject *getObject() { return MachOObj; }
diff --git a/include/llvm/Object/ObjectFile.h b/include/llvm/Object/ObjectFile.h
index dd47ceb..1e9d895 100644
--- a/include/llvm/Object/ObjectFile.h
+++ b/include/llvm/Object/ObjectFile.h
@@ -359,6 +359,11 @@ public:
virtual StringRef getFileFormatName() const = 0;
virtual /* Triple::ArchType */ unsigned getArch() const = 0;
+ /// For shared objects, returns the name which this object should be
+ /// loaded from at runtime. This corresponds to DT_SONAME on ELF and
+ /// LC_ID_DYLIB (install name) on MachO.
+ virtual StringRef getLoadName() const = 0;
+
/// @returns Pointer to ObjectFile subclass to handle this type of object.
/// @param ObjectPath The path to the object file. ObjectPath.isObject must
/// return true.