# RUN: yaml2obj %s > %t
# RUN: llvm-objcopy -O binary -j .text %t %t2
# RUN: llvm-objcopy -O binary -only-keep .text %t %t3
+# RUN: llvm-objcopy --dump-section .text=%t4 %t %t5
+# RUN: llvm-objcopy --dump-section .foo=%t6 %t %t7
+# RUN: not llvm-objcopy --dump-section .bar=%t8 %t %t9 2>&1 | FileCheck %s --check-prefix=NOBITS
# RUN: od -t x1 %t2 | FileCheck %s
+# RUN: od -t x1 %t6 | FileCheck %s --check-prefix=NON-ALLOC
# RUN: wc -c %t2 | FileCheck %s --check-prefix=SIZE
# RUN: diff %t2 %t3
+# RUN: diff %t4 %t3
!ELF
FileHeader:
Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
AddressAlign: 0x0000000000001000
Content: "DEADBEEF"
+ - Name: .foo
+ Type: SHT_PROGBITS
+ Flags: [ SHF_WRITE ]
+ Content: "CAFE"
+ - Name: .bar
+ Type: SHT_NOBITS
+ Flags: [ SHF_WRITE ]
ProgramHeaders:
- Type: PT_LOAD
Flags: [ PF_X, PF_R ]
#CHECK: 0000000 de ad be ef
+#NON-ALLOC: 0000000 ca fe
+
#SIZE: 4
+
+#NOBITS: Can't dump section ".bar": it has no contents
std::vector<StringRef> Keep;
std::vector<StringRef> OnlyKeep;
std::vector<StringRef> AddSection;
+ std::vector<StringRef> DumpSection;
std::vector<StringRef> SymbolsToLocalize;
std::vector<StringRef> SymbolsToGlobalize;
std::vector<StringRef> SymbolsToWeaken;
Writer->write();
}
+static Error dumpSectionToFile(StringRef SecName, StringRef Filename,
+ Object &Obj) {
+ for (auto &Sec : Obj.sections()) {
+ if (Sec.Name == SecName) {
+ if (Sec.OriginalData.size() == 0)
+ return make_error<StringError>("Can't dump section \"" + SecName +
+ "\": it has no contents",
+ object_error::parse_failed);
+ Expected<std::unique_ptr<FileOutputBuffer>> BufferOrErr =
+ FileOutputBuffer::create(Filename, Sec.OriginalData.size());
+ if (!BufferOrErr)
+ return BufferOrErr.takeError();
+ std::unique_ptr<FileOutputBuffer> Buf = std::move(*BufferOrErr);
+ std::copy(Sec.OriginalData.begin(), Sec.OriginalData.end(),
+ Buf->getBufferStart());
+ if (Error E = Buf->commit())
+ return E;
+ return Error::success();
+ }
+ }
+ return make_error<StringError>("Section not found",
+ object_error::parse_failed);
+}
+
// This function handles the high level operations of GNU objcopy including
// handling command line options. It's important to outline certain properties
// we expect to hold of the command line operations. Any operation that "keeps"
}
}
+ if (!Config.DumpSection.empty()) {
+ for (const auto &Flag : Config.DumpSection) {
+ std::pair<StringRef, StringRef> SecPair = Flag.split("=");
+ StringRef SecName = SecPair.first;
+ StringRef File = SecPair.second;
+ if (Error E = dumpSectionToFile(SecName, File, Obj))
+ reportError(Config.InputFilename, std::move(E));
+ }
+ }
+
if (!Config.AddGnuDebugLink.empty())
Obj.addSection<GnuDebugLinkSection>(Config.AddGnuDebugLink);
}
Config.OnlyKeep.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_add_section))
Config.AddSection.push_back(Arg->getValue());
+ for (auto Arg : InputArgs.filtered(OBJCOPY_dump_section))
+ Config.DumpSection.push_back(Arg->getValue());
Config.StripAll = InputArgs.hasArg(OBJCOPY_strip_all);
Config.StripAllGNU = InputArgs.hasArg(OBJCOPY_strip_all_gnu);
Config.StripDebug = InputArgs.hasArg(OBJCOPY_strip_debug);