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[Object/ELF] - Improve error reporting for notes.
This patch improves the error messages reported for note sections and phdrs and also makes a cleanup for existent test case. Differential revision: https://reviews.llvm.org/D64470 llvm-svn: 365775
This commit is contained in:
George Rimar
parent
8afd96f509
commit
34564324f8
@ -201,14 +201,11 @@ public:
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/// \param Err [out] an error to support fallible iteration, which should
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/// be checked after iteration ends.
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Elf_Note_Iterator notes_begin(const Elf_Phdr &Phdr, Error &Err) const {
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if (Phdr.p_type != ELF::PT_NOTE) {
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// TODO: this error is untested.
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Err = createError("attempt to iterate notes of non-note program header");
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return Elf_Note_Iterator(Err);
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}
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assert(Phdr.p_type == ELF::PT_NOTE && "Phdr is not of type PT_NOTE");
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if (Phdr.p_offset + Phdr.p_filesz > getBufSize()) {
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// TODO: this error is untested.
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Err = createError("invalid program header offset/size");
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Err = createError("PT_NOTE header has invalid offset (0x" +
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Twine::utohexstr(Phdr.p_offset) + ") or size (0x" +
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Twine::utohexstr(Phdr.p_filesz) + ")");
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return Elf_Note_Iterator(Err);
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}
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return Elf_Note_Iterator(base() + Phdr.p_offset, Phdr.p_filesz, Err);
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@ -222,14 +219,12 @@ public:
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/// \param Err [out] an error to support fallible iteration, which should
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/// be checked after iteration ends.
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Elf_Note_Iterator notes_begin(const Elf_Shdr &Shdr, Error &Err) const {
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if (Shdr.sh_type != ELF::SHT_NOTE) {
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// TODO: this error is untested.
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Err = createError("attempt to iterate notes of non-note section");
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return Elf_Note_Iterator(Err);
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}
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assert(Shdr.sh_type == ELF::SHT_NOTE && "Shdr is not of type SHT_NOTE");
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if (Shdr.sh_offset + Shdr.sh_size > getBufSize()) {
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// TODO: this error is untested.
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Err = createError("invalid section offset/size");
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Err = createError("SHT_NOTE section " + getSecIndexForError(this, &Shdr) +
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" has invalid offset (0x" +
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Twine::utohexstr(Shdr.sh_offset) + ") or size (0x" +
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Twine::utohexstr(Shdr.sh_size) + ")");
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return Elf_Note_Iterator(Err);
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}
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return Elf_Note_Iterator(base() + Shdr.sh_offset, Shdr.sh_size, Err);
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@ -1,25 +1,27 @@
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# RUN: yaml2obj %s > %t.so
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# RUN: llvm-readelf --notes %t.so | FileCheck %s --check-prefix=GNU
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# RUN: llvm-readobj --elf-output-style LLVM --notes %t.so | FileCheck %s --check-prefix=LLVM
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## Test tools are able to dump different types of notes.
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# GNU: Displaying notes found at file offset 0x00000340 with length 0x00000020:
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# RUN: yaml2obj --docnum=1 %s > %t1.so
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# RUN: llvm-readelf --notes %t1.so | FileCheck %s --check-prefix=GNU
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# RUN: llvm-readobj --notes %t1.so | FileCheck %s --check-prefix=LLVM
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# GNU: Displaying notes found at file offset 0x00000200 with length 0x00000020:
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# GNU-NEXT: Owner Data size Description
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# GNU-NEXT: GNU 0x00000010 NT_GNU_ABI_TAG (ABI version tag)
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# GNU-NEXT: OS: Linux, ABI: 2.6.32
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# GNU: Displaying notes found at file offset 0x00000360 with length 0x00000020:
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# GNU: Displaying notes found at file offset 0x00000220 with length 0x00000020:
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# GNU-NEXT: Owner Data size Description
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# GNU-NEXT: GNU 0x00000010 NT_GNU_BUILD_ID (unique build ID bitstring)
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# GNU-NEXT: Build ID: 4fcb712aa6387724a9f465a32cd8c14b
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# GNU: Displaying notes found at file offset 0x000003cc with length 0x0000001c:
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# GNU: Displaying notes found at file offset 0x00000240 with length 0x0000001c:
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# GNU-NEXT: Owner Data size Description
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# GNU-NEXT: GNU 0x00000009 NT_GNU_GOLD_VERSION (gold version)
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# GNU-NEXT: Version: gold 1.11
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# LLVM: Notes [
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# LLVM-NEXT: NoteSection {
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# LLVM-NEXT: Offset: 0x340
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# LLVM-NEXT: Offset: 0x200
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# LLVM-NEXT: Size: 0x20
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# LLVM-NEXT: Note {
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# LLVM-NEXT: Owner: GNU
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@ -30,7 +32,7 @@
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# LLVM-NEXT: }
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# LLVM-NEXT: }
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# LLVM-NEXT: NoteSection {
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# LLVM-NEXT: Offset: 0x360
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# LLVM-NEXT: Offset: 0x220
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# LLVM-NEXT: Size: 0x20
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# LLVM-NEXT: Note {
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# LLVM-NEXT: Owner: GNU
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@ -40,7 +42,7 @@
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# LLVM-NEXT: }
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# LLVM-NEXT: }
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# LLVM-NEXT: NoteSection {
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# LLVM-NEXT: Offset: 0x3CC
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# LLVM-NEXT: Offset: 0x240
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# LLVM-NEXT: Size: 0x1C
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# LLVM-NEXT: Note {
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# LLVM-NEXT: Owner: GNU
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@ -53,70 +55,110 @@
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--- !ELF
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FileHeader:
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Class: ELFCLASS64
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Data: ELFDATA2LSB
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Type: ET_EXEC
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Machine: EM_X86_64
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Class: ELFCLASS64
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Data: ELFDATA2LSB
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Type: ET_EXEC
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Machine: EM_X86_64
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Sections:
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- Name: .note.ABI-tag
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Type: SHT_NOTE
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AddressAlign: 0x0000000000000004
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Content: 040000001000000001000000474E550000000000020000000600000020000000
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- Name: .note.gnu.build-id
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Type: SHT_NOTE
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Flags: [ SHF_ALLOC ]
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Address: 0x0000000000400120
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AddressAlign: 0x0000000000000004
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Content: 040000001000000003000000474E55004FCB712AA6387724A9F465A32CD8C14B
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- Name: .text
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
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Address: 0x0000000000400140
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AddressAlign: 0x0000000000000001
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Content: 31C0C3
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- Name: .eh_frame
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC ]
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Address: 0x0000000000400148
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AddressAlign: 0x0000000000000008
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Content: 1400000000000000017A5200017810011B0C070890010000140000001C000000D8FFFFFF030000000000000000000000
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- Name: .data
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Type: SHT_PROGBITS
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Flags: [ SHF_WRITE, SHF_ALLOC ]
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Address: 0x0000000000401000
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AddressAlign: 0x0000000000000001
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Content: ''
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- Name: .bss
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Type: SHT_NOBITS
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Flags: [ SHF_WRITE, SHF_ALLOC ]
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Address: 0x0000000000401000
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AddressAlign: 0x0000000000000001
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- Name: .comment
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Type: SHT_PROGBITS
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Flags: [ SHF_MERGE, SHF_STRINGS ]
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AddressAlign: 0x0000000000000001
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Content: 004743433A2028474E552920352E342E3000
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- Name: .note.gnu.gold-version
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Type: SHT_NOTE
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AddressAlign: 0x0000000000000004
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Content: 040000000900000004000000474E5500676F6C6420312E3131000000
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Symbols:
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- Name: reduced.c
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Type: STT_FILE
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- Type: STT_FILE
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- Name: main
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Type: STT_FUNC
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Section: .text
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Value: 0x0000000000400140
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Size: 0x0000000000000003
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Binding: STB_GLOBAL
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- Name: _edata
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Value: 0x0000000000401000
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Binding: STB_GLOBAL
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- Name: __bss_start
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Value: 0x0000000000401000
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Binding: STB_GLOBAL
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- Name: _end
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Value: 0x0000000000401000
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Binding: STB_GLOBAL
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...
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- Name: .note.ABI-tag
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Type: SHT_NOTE
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AddressAlign: 0x0000000000000004
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Content: 040000001000000001000000474E550000000000020000000600000020000000
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- Name: .note.gnu.build-id
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Type: SHT_NOTE
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Flags: [ SHF_ALLOC ]
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Address: 0x0000000000400120
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AddressAlign: 0x0000000000000004
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Content: 040000001000000003000000474E55004FCB712AA6387724A9F465A32CD8C14B
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- Name: .note.gnu.gold-version
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Type: SHT_NOTE
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AddressAlign: 0x0000000000000004
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Content: 040000000900000004000000474E5500676F6C6420312E3131000000
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## Test tools report an error if a note section has an invalid offset
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## that goes past the end of file.
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# RUN: yaml2obj --docnum=2 %s > %t2.so
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# RUN: not llvm-readelf --notes %t2.so 2>&1 | FileCheck %s --check-prefix=ERR1
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# RUN: not llvm-readobj --notes %t2.so 2>&1 | FileCheck %s --check-prefix=ERR1
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# ERR1: error: SHT_NOTE section [index 1] has invalid offset (0xffff0000) or size (0x0)
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--- !ELF
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FileHeader:
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Class: ELFCLASS64
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Data: ELFDATA2LSB
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Type: ET_EXEC
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Machine: EM_X86_64
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Sections:
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- Name: .note
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Type: SHT_NOTE
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ShOffset: 0xffff0000
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## Test tools report an error if a note section has invalid size
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## that goes past the end of file.
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# RUN: yaml2obj --docnum=3 %s > %t3.so
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# RUN: not llvm-readelf --notes %t3.so 2>&1 | FileCheck %s --check-prefix=ERR2
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# RUN: not llvm-readobj --notes %t3.so 2>&1 | FileCheck %s --check-prefix=ERR2
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# ERR2: error: SHT_NOTE section [index 1] has invalid offset (0x180) or size (0xffff0000)
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--- !ELF
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FileHeader:
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Class: ELFCLASS64
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Data: ELFDATA2LSB
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Type: ET_EXEC
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Machine: EM_X86_64
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Sections:
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- Name: .note
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Type: SHT_NOTE
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ShSize: 0xffff0000
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## Test tools report an error if a note program header has an invalid offset that
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## goes past the end of file.
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# RUN: yaml2obj --docnum=4 %s > %t4.so
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# RUN: not llvm-readelf --notes %t4.so 2>&1 | FileCheck %s --check-prefix=ERR3
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# RUN: not llvm-readobj --notes %t4.so 2>&1 | FileCheck %s --check-prefix=ERR3
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# ERR3: error: PT_NOTE header has invalid offset (0xffff0000) or size (0x0)
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--- !ELF
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FileHeader:
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Class: ELFCLASS64
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Data: ELFDATA2LSB
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Type: ET_CORE
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Machine: EM_X86_64
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Sections:
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- Name: .note
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Type: SHT_NOTE
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ProgramHeaders:
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- Type: PT_NOTE
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Offset: 0xffff0000
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Sections:
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- Section: .note
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## Test tools report an error if a note program header has an invalid size that
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## goes past the end of file.
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# RUN: yaml2obj --docnum=5 %s > %t5.so
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# RUN: not llvm-readelf --notes %t5.so 2>&1 | FileCheck %s --check-prefix=ERR4
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# RUN: not llvm-readobj --notes %t5.so 2>&1 | FileCheck %s --check-prefix=ERR4
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# ERR4: error: PT_NOTE header has invalid offset (0x1b8) or size (0xffff0000)
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--- !ELF
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FileHeader:
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Class: ELFCLASS64
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Data: ELFDATA2LSB
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Type: ET_CORE
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Machine: EM_X86_64
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Sections:
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- Name: .note
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Type: SHT_NOTE
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ProgramHeaders:
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- Type: PT_NOTE
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FileSize: 0xffff0000
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Sections:
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- Section: .note
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