Index: llvm/test/tools/llvm-readobj/ELF/broken-dynsym-link.test =================================================================== --- llvm/test/tools/llvm-readobj/ELF/broken-dynsym-link.test +++ /dev/null @@ -1,57 +0,0 @@ -## Test that we are able to dump section headers even if the -## .dynsym section's sh_link field is broken. - -## Case 1: sh_link is set to 0. -# RUN: yaml2obj --docnum=1 -DLINK=0 %s -o %t1 -# RUN: llvm-readobj -S %t1 2>&1 | FileCheck %s -DFILE=%t1 --check-prefixes=LLVM,ERR -# RUN: llvm-readelf -S %t1 2>&1 | FileCheck %s -DFILE=%t1 --check-prefixes=GNU,ERR - -# ERR: warning: '[[FILE]]': invalid sh_type for string table section [index 0]: expected SHT_STRTAB, but got SHT_NULL - -# LLVM: Name: .dynsym -# LLVM-NEXT: Type: SHT_DYNSYM -# LLVM-NEXT: Flags [ -# LLVM-NEXT: SHF_ALLOC -# LLVM-NEXT: ] -# LLVM-NEXT: Address: 0x0 -# LLVM-NEXT: Offset: 0x40 -# LLVM-NEXT: Size: 24 -# LLVM-NEXT: Link: 0 - -# GNU: Section Headers: -# GNU-NEXT: [Nr] Name Type Address Off Size ES Flg Lk -# GNU-NEXT: [ 0] NULL 0000000000000000 000000 000000 00 0 0 -# GNU-NEXT: [ 1] .dynsym DYNSYM 0000000000000000 000040 000018 18 A 0 - ---- !ELF -FileHeader: - Class: ELFCLASS64 - Data: ELFDATA2LSB - Type: ET_DYN -Sections: - - Name: .dynsym - Type: SHT_DYNSYM - Link: [[LINK]] - -## Case 2: sh_link is set to 255, which is larger than the number of the sections. -# RUN: yaml2obj --docnum=1 -DLINK=255 %s -o %t2 - -# RUN: llvm-readobj -S %t2 2>&1 | FileCheck -DFILE=%t2 %s --check-prefixes=LLVM2,ERR2 -# RUN: llvm-readelf -S %t2 2>&1 | FileCheck -DFILE=%t2 %s --check-prefixes=GNU2,ERR2 - -# ERR2: warning: '[[FILE]]': invalid section index: 255 - -# LLVM2: Name: .dynsym -# LLVM2-NEXT: Type: SHT_DYNSYM -# LLVM2-NEXT: Flags [ -# LLVM2-NEXT: SHF_ALLOC -# LLVM2-NEXT: ] -# LLVM2-NEXT: Address: 0x0 -# LLVM2-NEXT: Offset: 0x40 -# LLVM2-NEXT: Size: 24 -# LLVM2-NEXT: Link: 255 - -# GNU2: Section Headers: -# GNU2-NEXT: [Nr] Name Type Address Off Size ES Flg Lk -# GNU2-NEXT: [ 0] NULL 0000000000000000 000000 000000 00 0 0 -# GNU2-NEXT: [ 1] .dynsym DYNSYM 0000000000000000 000040 000018 18 A 255 Index: llvm/test/tools/llvm-readobj/ELF/dyn-symbols.test =================================================================== --- llvm/test/tools/llvm-readobj/ELF/dyn-symbols.test +++ llvm/test/tools/llvm-readobj/ELF/dyn-symbols.test @@ -610,6 +610,7 @@ - Name: .dynsym Type: SHT_DYNSYM EntSize: [[ENTSIZE=]] + Link: [[LINK=]] ShOffset: [[OFFSET=]] ShSize: [[SIZE=]] DynamicSymbols: @@ -642,3 +643,65 @@ # SIZE-BROKEN-LLVM: DynamicSymbols [ # SIZE-BROKEN-LLVM-NEXT: ] + +## d) check we report a warning when the sh_link field of the SHT_DYNSYM section +## is not a valid section index or is not an index of a valid string table. +# RUN: yaml2obj --docnum=14 %s -DLINK=0xffffffff -o %t16.link +# RUN: llvm-readobj %t16.link --dyn-symbols 2>&1 | FileCheck %s -DFILE=%t16.link \ +# RUN: --check-prefixes=LINK-BROKEN1,LINK-BROKEN-LLVM --implicit-check-not=warning: +# RUN: llvm-readelf %t16.link --dyn-symbols 2>&1 | FileCheck %s -DFILE=%t16.link \ +# RUN: --check-prefixes=LINK-BROKEN1,LINK-BROKEN-GNU --implicit-check-not=warning: + +## Also test that we are able to dump section headers even if the .dynsym section's sh_link field is broken. +# RUN: llvm-readobj %t16.link --section-headers --dyn-symbols 2>&1 | FileCheck %s -DFILE=%t16.link \ +# RUN: --check-prefixes=LINK-BROKEN1,LINK-SEC-HDRS-LLVM,LINK-BROKEN-LLVM --implicit-check-not=warning: +# RUN: llvm-readelf %t16.link --section-headers --dyn-symbols 2>&1 | FileCheck %s -DFILE=%t16.link \ +# RUN: --check-prefixes=LINK-BROKEN1,LINK-SEC-HDRS-GNU,LINK-BROKEN-GNU + +# RUN: yaml2obj --docnum=14 %s -DLINK=0x0 -o %t16.link.0 +# RUN: llvm-readobj %t16.link.0 --dyn-symbols 2>&1 | FileCheck %s -DFILE=%t16.link.0 \ +# RUN: --check-prefixes=LINK-BROKEN2,LINK-BROKEN-LLVM --implicit-check-not=warning: +# RUN: llvm-readelf %t16.link.0 --dyn-symbols 2>&1 | FileCheck %s -DFILE=%t16.link.0 \ +# RUN: --check-prefixes=LINK-BROKEN2,LINK-BROKEN-GNU --implicit-check-not=warning: + +## Also test that we are able to dump section headers even if the .dynsym section's sh_link field is broken. +# RUN: llvm-readobj %t16.link.0 --section-headers --dyn-symbols 2>&1 | FileCheck %s -DFILE=%t16.link.0 \ +# RUN: --check-prefixes=LINK-BROKEN2,LINK-SEC-HDRS-LLVM,LINK-BROKEN-LLVM --implicit-check-not=warning: +# RUN: llvm-readelf %t16.link.0 --section-headers --dyn-symbols 2>&1 | FileCheck %s -DFILE=%t16.link.0 \ +# RUN: --check-prefixes=LINK-BROKEN2,LINK-SEC-HDRS-GNU,LINK-BROKEN-GNU --implicit-check-not=warning: + +# LINK-BROKEN1: warning: '[[FILE]]': unable to get the string table for the SHT_DYNSYM section with index 1: invalid section index: 4294967295 +# LINK-BROKEN2: warning: '[[FILE]]': unable to get the string table for the SHT_DYNSYM section with index 1: invalid sh_type for string table section [index 0]: expected SHT_STRTAB, but got SHT_NULL + +# LINK-SEC-HDRS-LLVM: Sections [ +# LINK-SEC-HDRS-GNU: There are 5 section headers, starting at offset 0x80: + +# LINK-BROKEN-LLVM: DynamicSymbols [ +# LINK-BROKEN-LLVM-NEXT: warning: '[[FILE]]': st_name (0x0) is past the end of the string table of size 0x0 +# LINK-BROKEN-LLVM-NEXT: Symbol { +# LINK-BROKEN-LLVM-NEXT: Name: (0) +# LINK-BROKEN-LLVM-NEXT: Value: 0x0 +# LINK-BROKEN-LLVM-NEXT: Size: 0 +# LINK-BROKEN-LLVM-NEXT: Binding: Local (0x0) +# LINK-BROKEN-LLVM-NEXT: Type: None (0x0) +# LINK-BROKEN-LLVM-NEXT: Other: 0 +# LINK-BROKEN-LLVM-NEXT: Section: Undefined (0x0) +# LINK-BROKEN-LLVM-NEXT: } +# LINK-BROKEN-LLVM-NEXT: warning: '[[FILE]]': st_name (0x1) is past the end of the string table of size 0x0 +# LINK-BROKEN-LLVM-NEXT: Symbol { +# LINK-BROKEN-LLVM-NEXT: Name: (1) +# LINK-BROKEN-LLVM-NEXT: Value: 0x0 +# LINK-BROKEN-LLVM-NEXT: Size: 0 +# LINK-BROKEN-LLVM-NEXT: Binding: Local (0x0) +# LINK-BROKEN-LLVM-NEXT: Type: None (0x0) +# LINK-BROKEN-LLVM-NEXT: Other: 0 +# LINK-BROKEN-LLVM-NEXT: Section: Undefined (0x0) +# LINK-BROKEN-LLVM-NEXT: } +# LINK-BROKEN-LLVM-NEXT: ] + +# LINK-BROKEN-GNU: Symbol table '.dynsym' contains 2 entries: +# LINK-BROKEN-GNU-NEXT: Num: Value Size Type Bind Vis Ndx Name +# LINK-BROKEN-GNU-NEXT: warning: '[[FILE]]': st_name (0x0) is past the end of the string table of size 0x0 +# LINK-BROKEN-GNU-NEXT: 0: 00000000 0 NOTYPE LOCAL DEFAULT UND +# LINK-BROKEN-GNU-NEXT: warning: '[[FILE]]': st_name (0x1) is past the end of the string table of size 0x0 +# LINK-BROKEN-GNU-NEXT: 1: 00000000 0 NOTYPE LOCAL DEFAULT UND Index: llvm/tools/llvm-readobj/ELFDumper.cpp =================================================================== --- llvm/tools/llvm-readobj/ELFDumper.cpp +++ llvm/tools/llvm-readobj/ELFDumper.cpp @@ -2044,7 +2044,8 @@ if (Expected E = Obj.getStringTableForSymtab(Sec)) DynamicStringTable = *E; else - reportWarning(E.takeError(), ObjF.getFileName()); + reportUniqueWarning("unable to get the string table for the " + + describe(Sec) + ": " + toString(E.takeError())); } else { reportUniqueWarning("unable to read dynamic symbols from " + describe(Sec) + ": " +