[PATCH] D26613: [ELF] - Allow symbols of STT_NOTYPE to be associated with SHT_SYMTAB sections.
George Rimar via llvm-commits
llvm-commits at lists.llvm.org
Mon Nov 14 08:06:43 PST 2016
grimar created this revision.
grimar added reviewers: ruiu, rafael.
grimar added subscribers: davide, emaste, llvm-commits, grimar, evgeny777.
Found this when tried to link lang/ccl FreeBSD port.
Issue is very close to https://reviews.llvm.org/D23201.
GNU assembler 2.17.50 [FreeBSD] 2007-07-03 could generate broken objects,
where notype symbols are associated with symtab:
[ 9] .symtab SYMTAB 0000000000000000 00003c78
0000000000006858 0000000000000018 10 803 8
192: 000000000000000d 0 NOTYPE LOCAL DEFAULT 9 _cons_org
This is the reason of lang/ccl port link fail:
===> Building for ccl-1.11
m4 -DFREEBSD -DX86 -DX8664 -DHAVE_TLS -I../ ../x86-spjump64.s | as --64 -o x86-spjump64.o
cc -m64 -g -Wl,--export-dynamic -o ../../fx86cl64 pad.o x86-spjump64.o x86-spentry64.o x86-subprims64.o pmcl-kernel.o gc-common.o x86-gc.o bits.o x86-exceptions.o x86-utils.o image.o thread_manager.o lisp-debug.o memory.o unix-calls.o x86-asmutils64.o imports.o lispdcmd.o plprint.o plsym.o xlbt.o x86_print.o -lm -lthr
/usr/bin/ld: error: x86-spjump64.o: invalid section index: 9
cc: error: linker command failed with exit code 1 (use -v to see invocation)
*** Error code 1
Patch fixes the issue.
https://reviews.llvm.org/D26613
Files:
ELF/InputFiles.cpp
test/ELF/invalid/symtab-symbols.test
Index: test/ELF/invalid/symtab-symbols.test
===================================================================
--- test/ELF/invalid/symtab-symbols.test
+++ test/ELF/invalid/symtab-symbols.test
@@ -0,0 +1,25 @@
+# RUN: yaml2obj %s -o %t
+# RUN: ld.lld -shared %t -o %tout
+
+# GNU assembler 2.17.50 [FreeBSD] 2007-07-03 could generate
+# broken objects.
+# Verify that lld can handle STT_NOTYPE symbols associated
+# with SHT_SYMTAB section.
+
+!ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ OSABI: ELFOSABI_FREEBSD
+ Type: ET_REL
+ Machine: EM_X86_64
+Sections:
+ - Name: .text
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
+ AddressAlign: 0x0000000000000010
+ Content: "00000000"
+Symbols:
+ Local:
+ - Type: STT_NOTYPE
+ Section: .symtab
Index: ELF/InputFiles.cpp
===================================================================
--- ELF/InputFiles.cpp
+++ ELF/InputFiles.cpp
@@ -417,13 +417,14 @@
fatal(getFilename(this) + ": invalid section index: " + Twine(Index));
InputSectionBase<ELFT> *S = Sections[Index];
- // We found that GNU assembler 2.17.50 [FreeBSD] 2007-07-03
- // could generate broken objects. STT_SECTION symbols can be
+ // We found that GNU assembler 2.17.50 [FreeBSD] 2007-07-03 could
+ // generate broken objects. STT_SECTION/STT_NOTYPE symbols can be
// associated with SHT_REL[A]/SHT_SYMTAB/SHT_STRTAB sections.
- // In this case it is fine for section to be null here as we
- // do not allocate sections of these types.
+ // In this case it is fine for section to be null here as we do not
+ // allocate sections of these types.
if (!S) {
- if (Index == 0 || Sym.getType() == STT_SECTION)
+ if (Index == 0 || Sym.getType() == STT_SECTION ||
+ Sym.getType() == STT_NOTYPE)
return nullptr;
fatal(getFilename(this) + ": invalid section index: " + Twine(Index));
}
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