--- /dev/null
+## many-sections.elf-x86_64 is a file that was generated to simulate
+## an object with more than ~65k sections. When an ELF object
+## has SHN_LORESERVE (0xff00) or more sections, its e_shnum field
+## should be zero and sh_size of the section header at index 0 is used
+## to store the value. If the section name string table section index is
+## greater than or equal to SHN_LORESERVE, then e_shstrndx field
+## should have the value of SHN_XINDEX and sh_link of the section header
+## at index 0 is used to store the value.
+##
+## many-sections.elf-x86_64 has few sections to save disk
+## space, but its e_shnum, e_shstrndx, sh_size and sh_link fields are set
+## according to the above description, so that we can test the dumper.
+
+# RUN: llvm-readobj -file-headers -elf-output-style GNU \
+# RUN: %p/Inputs/many-sections.elf-x86_64 | FileCheck %s --check-prefix=GNU1
+# GNU1: Number of section headers: 0 (5)
+# GNU1: Section header string table index: 65535 (3)
+
+# RUN: llvm-readobj -file-headers -elf-output-style LLVM \
+# RUN: %p/Inputs/many-sections.elf-x86_64 | FileCheck %s --check-prefix=LLVM1
+# LLVM1: SectionHeaderCount: 0 (5)
+# LLVM1: StringTableSectionIndex: 65535 (3)
+
+## many-sections-stripped.elf-x86_64 is many-sections.elf-x86_64 with
+## e_shoff field set to zero, but not e_shstrndx, to show that
+## this corrupt case is handled correctly.
+
+# RUN: llvm-readobj -file-headers -elf-output-style GNU \
+# RUN: %p/Inputs/many-sections-stripped.elf-x86_64 | FileCheck %s --check-prefix=GNU2
+# GNU2: Number of section headers: 0
+# GNU2: Section header string table index: 65535 (corrupt: out of range)
+
+# RUN: llvm-readobj -file-headers -elf-output-style LLVM \
+# RUN: %p/Inputs/many-sections-stripped.elf-x86_64 | FileCheck %s --check-prefix=LLVM2
+# LLVM2: SectionHeaderCount: 0
+# LLVM2: StringTableSectionIndex: 65535 (corrupt: out of range)
OS.flush();
}
+template <class ELFT>
+static std::string getSectionHeadersNumString(const ELFFile<ELFT> *Obj) {
+ const typename ELFT::Ehdr *ElfHeader = Obj->getHeader();
+ if (ElfHeader->e_shnum != 0)
+ return to_string(ElfHeader->e_shnum);
+
+ ArrayRef<typename ELFT::Shdr> Arr = unwrapOrError(Obj->sections());
+ if (Arr.empty())
+ return "0";
+ return "0 (" + to_string(Arr[0].sh_size) + ")";
+}
+
+template <class ELFT>
+static std::string getSectionHeaderTableIndexString(const ELFFile<ELFT> *Obj) {
+ const typename ELFT::Ehdr *ElfHeader = Obj->getHeader();
+ if (ElfHeader->e_shstrndx != SHN_XINDEX)
+ return to_string(ElfHeader->e_shstrndx);
+
+ ArrayRef<typename ELFT::Shdr> Arr = unwrapOrError(Obj->sections());
+ if (Arr.empty())
+ return "65535 (corrupt: out of range)";
+ return to_string(ElfHeader->e_shstrndx) + " (" + to_string(Arr[0].sh_link) + ")";
+}
+
template <class ELFT> void GNUStyle<ELFT>::printFileHeaders(const ELFO *Obj) {
const Elf_Ehdr *e = Obj->getHeader();
OS << "ELF Header:\n";
printFields(OS, "Number of program headers:", Str);
Str = to_string(e->e_shentsize) + " (bytes)";
printFields(OS, "Size of section headers:", Str);
- Str = to_string(e->e_shnum);
+ Str = getSectionHeadersNumString(Obj);
printFields(OS, "Number of section headers:", Str);
- Str = to_string(e->e_shstrndx);
+ Str = getSectionHeaderTableIndexString(Obj);
printFields(OS, "Section header string table index:", Str);
}
W.printNumber("ProgramHeaderEntrySize", e->e_phentsize);
W.printNumber("ProgramHeaderCount", e->e_phnum);
W.printNumber("SectionHeaderEntrySize", e->e_shentsize);
- W.printNumber("SectionHeaderCount", e->e_shnum);
- W.printNumber("StringTableSectionIndex", e->e_shstrndx);
+ W.printString("SectionHeaderCount", getSectionHeadersNumString(Obj));
+ W.printString("StringTableSectionIndex", getSectionHeaderTableIndexString(Obj));
}
}