## Test how llvm-readobj/llvm-readelf tools handle invalid SHT_GNU_versym sections. ## Check that we report a warning when sh_link references a non-existent section. # RUN: yaml2obj --docnum=1 -DLINK=0xFF %s -o %t1 # RUN: llvm-readelf -V %t1 2>&1 | FileCheck -DFILE=%t1 %s --check-prefix=GNU-INVALID-LINK # RUN: llvm-readobj -V %t1 2>&1 | FileCheck -DFILE=%t1 %s --check-prefix=LLVM-INVALID-LINK # GNU-INVALID-LINK: Version symbols section '.gnu.version' contains 1 entries: # GNU-INVALID-LINK-NEXT: warning: '[[FILE]]': invalid section linked to SHT_GNU_versym section with index 1: invalid section index: 255 # GNU-INVALID-LINK-NEXT: Addr: 0000000000000000 Offset: 0x000040 Link: 255 () # LLVM-INVALID-LINK: VersionSymbols [ # LLVM-INVALID-LINK-NEXT: warning: '[[FILE]]': invalid section linked to SHT_GNU_versym section with index 1: invalid section index: 255 # LLVM-INVALID-LINK-NEXT: ] --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_EXEC Sections: - Name: .gnu.version Type: SHT_GNU_versym Link: [[LINK]] Entries: [ 0 ] ## Check that we report a warning when the sh_link field of a SHT_GNU_versym section does not reference ## a dynamic symbol table section. # RUN: yaml2obj --docnum=1 -DLINK=0x0 %s -o %t2 # RUN: llvm-readelf -V %t2 2>&1 | FileCheck -DFILE=%t2 %s --check-prefix=INVALID-SYMBOL-TABLE-GNU # RUN: llvm-readobj -V %t2 2>&1 | FileCheck -DFILE=%t2 %s --check-prefix=INVALID-SYMBOL-TABLE-LLVM # INVALID-SYMBOL-TABLE-GNU: Version symbols section '.gnu.version' contains 1 entries: # INVALID-SYMBOL-TABLE-GNU-NEXT: Addr: 0000000000000000 Offset: 0x000040 Link: 0 () # INVALID-SYMBOL-TABLE-GNU-NEXT: warning: '[[FILE]]': invalid section linked to SHT_GNU_versym section with index 1: expected SHT_DYNSYM, but got SHT_NULL # INVALID-SYMBOL-TABLE-GNU-NEXT: 000: 0 (*local*) # INVALID-SYMBOL-TABLE-LLVM: VersionSymbols [ # INVALID-SYMBOL-TABLE-LLVM-NEXT: warning: '[[FILE]]': invalid section linked to SHT_GNU_versym section with index 1: expected SHT_DYNSYM, but got SHT_NULL # INVALID-SYMBOL-TABLE-LLVM-NEXT: ] ## Check we report a warning when something is wrong with a string table linked to a symbol table that ## is linked with SHT_GNU_versym. In this case we are unable to produce LLVM style output, ## but GNU style is fine because it does not need that string table. # RUN: yaml2obj --docnum=2 %s -o %t3 # RUN: llvm-readelf -V %t3 2>&1 | FileCheck -DFILE=%t3 %s --check-prefix=INVALID-STRING-TABLE-GNU # RUN: llvm-readobj -V %t3 2>&1 | FileCheck -DFILE=%t3 %s --check-prefix=INVALID-STRING-TABLE-LLVM # INVALID-STRING-TABLE-GNU: Version symbols section '.gnu.version' contains 1 entries: # INVALID-STRING-TABLE-GNU-NEXT: Addr: 0000000000000000 Offset: 0x000040 Link: 3 (.dynsym) # INVALID-STRING-TABLE-GNU-NEXT: warning: '[[FILE]]': can't get a string table for the symbol table linked to SHT_GNU_versym section with index 1: invalid string table linked to SHT_DYNSYM section with index 3: invalid sh_type for string table section [index 2]: expected SHT_STRTAB, but got SHT_NULL # INVALID-STRING-TABLE-GNU-NEXT: 000: 0 (*local*) # INVALID-STRING-TABLE-LLVM: VersionSymbols [ # INVALID-STRING-TABLE-LLVM-NEXT: warning: '[[FILE]]': can't get a string table for the symbol table linked to SHT_GNU_versym section with index 1: invalid string table linked to SHT_DYNSYM section with index 3: invalid sh_type for string table section [index 2]: expected SHT_STRTAB, but got SHT_NULL # INVALID-STRING-TABLE-LLVM-NEXT: ] --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_EXEC Sections: - Name: .gnu.version Type: SHT_GNU_versym Entries: [ 0 ] - Name: .dynstr Type: SHT_NULL DynamicSymbols: [] ## Check we report a warning when a SHT_GNU_versym section is not correctly aligned in memory. # RUN: yaml2obj --docnum=3 %s -DSHOFFSET=0xffff -o %t4 # RUN: llvm-readelf -V %t4 2>&1 | FileCheck -DFILE=%t4 %s --check-prefix=MISALIGNED-GNU # RUN: llvm-readobj -V %t4 2>&1 | FileCheck -DFILE=%t4 %s --check-prefix=MISALIGNED-LLVM # MISALIGNED-GNU: Version symbols section '.gnu.version' contains 1 entries: # MISALIGNED-GNU-NEXT: Addr: 0000000000000000 Offset: 0x00ffff Link: 2 (.dynsym) # MISALIGNED-GNU-NEXT: warning: '[[FILE]]': the SHT_GNU_versym section with index 1 is misaligned # MISALIGNED-LLVM: VersionSymbols [ # MISALIGNED-LLVM-NEXT: warning: '[[FILE]]': the SHT_GNU_versym section with index 1 is misaligned # MISALIGNED-LLVM-NEXT: ] --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_EXEC Sections: - Name: .gnu.version Type: SHT_GNU_versym Entries: [ 0 ] ShOffset: [[SHOFFSET=]] ShName: [[SHNAME=]] - Name: .dynsym Type: SHT_DYNSYM ShName: [[DYNSYMNAME=]] DynamicSymbols: [] ## Check that llvm-readelf reports a warning when the name of the SHT_GNU_versym section can't be read. # RUN: yaml2obj %s --docnum=3 -DSHNAME=0xFF -o %t.invalid.name # RUN: llvm-readobj -V %t.invalid.name 2>&1 | \ # RUN: FileCheck %s --check-prefix=INVALID-NAME-LLVM -DFILE=%t.invalid.name --implicit-check-not=warning: # RUN: llvm-readelf -V %t.invalid.name 2>&1 | \ # RUN: FileCheck %s --check-prefix=INVALID-NAME-GNU -DFILE=%t.invalid.name --implicit-check-not=warning: # INVALID-NAME-LLVM: VersionSymbols [ # INVALID-NAME-LLVM-NEXT: Symbol { # INVALID-NAME-LLVM-NEXT: Version: 0 # INVALID-NAME-LLVM-NEXT: Name: # INVALID-NAME-LLVM-NEXT: } # INVALID-NAME-LLVM-NEXT: ] # INVALID-NAME-GNU: warning: '[[FILE]]': unable to get the name of SHT_GNU_versym section with index 1: a section [index 1] has an invalid sh_name (0xff) offset which goes past the end of the section name string table # INVALID-NAME-GNU-NEXT: Version symbols section '' contains 1 entries: # INVALID-NAME-GNU-NEXT: Addr: 0000000000000000 Offset: 0x000040 Link: 2 (.dynsym) # INVALID-NAME-GNU-NEXT: 000: 0 (*local*) ## Check that llvm-readelf reports a warning when we are unable to read the name of ## the section linked with the SHT_GNU_verneed section (usually ".dynsym"). # RUN: yaml2obj %s --docnum=3 -DDYNSYMNAME=0xFF -o %t.invalid.name2 # RUN: llvm-readobj -V %t.invalid.name2 2>&1 | \ # RUN: FileCheck %s --check-prefix=INVALID-NAME-LLVM -DFILE=%t.invalid.name2 --implicit-check-not=warning: # RUN: llvm-readelf -V %t.invalid.name2 2>&1 | \ # RUN: FileCheck %s --check-prefix=INVALID-NAME2-GNU -DFILE=%t.invalid.name2 --implicit-check-not=warning: # INVALID-NAME2-GNU: Version symbols section '.gnu.version' contains 1 entries: # INVALID-NAME2-GNU-NEXT: warning: '[[FILE]]': unable to get the name of SHT_DYNSYM section with index 2: a section [index 2] has an invalid sh_name (0xff) offset which goes past the end of the section name string table # INVALID-NAME2-GNU-NEXT: Addr: 0000000000000000 Offset: 0x000040 Link: 2 () # INVALID-NAME2-GNU-NEXT: 000: 0 (*local*) ## Check we report a warning when a SHT_GNU_versym section has an invalid entry size. # RUN: yaml2obj --docnum=4 %s -o %t5 # RUN: llvm-readelf -V --dyn-syms %t5 2>&1 | FileCheck -DFILE=%t5 %s --check-prefix=INVALID-ENT-SIZE-GNU # RUN: llvm-readobj -V --dyn-syms %t5 2>&1 | FileCheck -DFILE=%t5 %s --check-prefix=INVALID-ENT-SIZE-LLVM # INVALID-ENT-SIZE-GNU: Symbol table '.dynsym' contains 2 entries: # INVALID-ENT-SIZE-GNU-NEXT: Num: Value Size Type Bind Vis Ndx Name # INVALID-ENT-SIZE-GNU-NEXT: warning: '[[FILE]]': section [index 1] has invalid sh_entsize: expected 2, but got 3 # INVALID-ENT-SIZE-GNU-NEXT: 0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND @ # INVALID-ENT-SIZE-GNU-NEXT: 1: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND foo@ # INVALID-ENT-SIZE-GNU: Version symbols section '.gnu.version' contains 1 entries: # INVALID-ENT-SIZE-GNU-NEXT: Addr: 0000000000000000 Offset: 0x000040 Link: 2 (.dynsym) # INVALID-ENT-SIZE-GNU-NEXT: warning: '[[FILE]]': cannot read content of SHT_GNU_versym section with index 1: section [index 1] has invalid sh_entsize: expected 2, but got 3 # INVALID-ENT-SIZE-LLVM: DynamicSymbols [ # INVALID-ENT-SIZE-LLVM-NEXT: warning: '[[FILE]]': section [index 1] has invalid sh_entsize: expected 2, but got 3 # INVALID-ENT-SIZE-LLVM-NEXT: Symbol { # INVALID-ENT-SIZE-LLVM-NEXT: Name: @ (0) # INVALID-ENT-SIZE-LLVM-NEXT: Value: 0x0 # INVALID-ENT-SIZE-LLVM-NEXT: Size: 0 # INVALID-ENT-SIZE-LLVM-NEXT: Binding: Local (0x0) # INVALID-ENT-SIZE-LLVM-NEXT: Type: None (0x0) # INVALID-ENT-SIZE-LLVM-NEXT: Other: 0 # INVALID-ENT-SIZE-LLVM-NEXT: Section: Undefined (0x0) # INVALID-ENT-SIZE-LLVM-NEXT: } # INVALID-ENT-SIZE-LLVM-NEXT: Symbol { # INVALID-ENT-SIZE-LLVM-NEXT: Name: foo@ (1) # INVALID-ENT-SIZE-LLVM-NEXT: Value: 0x0 # INVALID-ENT-SIZE-LLVM-NEXT: Size: 0 # INVALID-ENT-SIZE-LLVM-NEXT: Binding: Local (0x0) # INVALID-ENT-SIZE-LLVM-NEXT: Type: None (0x0) # INVALID-ENT-SIZE-LLVM-NEXT: Other: 0 # INVALID-ENT-SIZE-LLVM-NEXT: Section: Undefined (0x0) # INVALID-ENT-SIZE-LLVM-NEXT: } # INVALID-ENT-SIZE-LLVM-NEXT: ] # INVALID-ENT-SIZE-LLVM: VersionSymbols [ # INVALID-ENT-SIZE-LLVM-NEXT: warning: '[[FILE]]': cannot read content of SHT_GNU_versym section with index 1: section [index 1] has invalid sh_entsize: expected 2, but got 3 # INVALID-ENT-SIZE-LLVM-NEXT: ] --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_EXEC Sections: - Name: .gnu.version Type: SHT_GNU_versym Entries: [ 0 ] EntSize: 3 DynamicSymbols: - Name: foo ## Check we report a warning when the number of version entries does not match the number of symbols in the associated symbol table. # RUN: yaml2obj --docnum=5 %s -o %t6 # RUN: llvm-readelf -V %t6 2>&1 | FileCheck -DFILE=%t6 %s --check-prefix=SYMBOLS-NUM-MISMATCH-GNU # RUN: llvm-readobj -V %t6 2>&1 | FileCheck -DFILE=%t6 %s --check-prefix=SYMBOLS-NUM-MISMATCH-LLVM # SYMBOLS-NUM-MISMATCH-GNU: Version symbols section '.gnu.version' contains 2 entries: # SYMBOLS-NUM-MISMATCH-GNU-NEXT: Addr: 0000000000000000 Offset: 0x000040 Link: 2 (.dynsym) # SYMBOLS-NUM-MISMATCH-GNU-NEXT: warning: '[[FILE]]': SHT_GNU_versym section with index 1: the number of entries (2) does not match the number of symbols (3) in the symbol table with index 2 # SYMBOLS-NUM-MISMATCH-GNU-NEXT: 000: 0 (*local*) 1 (*global*) # SYMBOLS-NUM-MISMATCH-LLVM: VersionSymbols [ # SYMBOLS-NUM-MISMATCH-LLVM-NEXT: warning: '[[FILE]]': SHT_GNU_versym section with index 1: the number of entries (2) does not match the number of symbols (3) in the symbol table with index 2 # SYMBOLS-NUM-MISMATCH-LLVM-NEXT: ] --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_EXEC Sections: - Name: .gnu.version Type: SHT_GNU_versym Entries: [ 0, 1 ] DynamicSymbols: - Name: foo - Name: bar ## Check we can dump a SHT_GNU_versym section when it is linked to a custom dynamic symbol ## table that is not called ".dynsym". # RUN: yaml2obj --docnum=6 %s -o %t7 # RUN: llvm-readelf -V %t7 2>&1 | FileCheck -DFILE=%t7 %s --check-prefix=CUSTOM-SYMTAB-GNU # RUN: llvm-readobj -V %t7 2>&1 | FileCheck -DFILE=%t7 %s --check-prefix=CUSTOM-SYMTAB-LLVM # CUSTOM-SYMTAB-GNU: Version symbols section '.gnu.version' contains 1 entries: # CUSTOM-SYMTAB-GNU-NEXT: Addr: 0000000000000000 Offset: 0x000040 Link: 2 (.foo.dynsym) # CUSTOM-SYMTAB-GNU-NEXT: 000: 0 (*local*) # CUSTOM-SYMTAB-LLVM: VersionSymbols [ # CUSTOM-SYMTAB-LLVM-NEXT: Symbol { # CUSTOM-SYMTAB-LLVM-NEXT: Version: 0 # CUSTOM-SYMTAB-LLVM-NEXT: Name: # CUSTOM-SYMTAB-LLVM-NEXT: } # CUSTOM-SYMTAB-LLVM-NEXT: ] --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_EXEC Sections: - Name: .gnu.version Type: SHT_GNU_versym Link: .foo.dynsym Entries: [ 0 ] ## A custom empty dynamic symbol table with a null entry. - Name: .foo.dynsym Type: SHT_DYNSYM Link: .dynstr EntSize: 24 Size: 24 DynamicSymbols: - Name: foo - Name: bar ## Version index in a SHT_GNU_versym section overflows the version map. ## Check we report it when trying to dump dynamic symbols. # RUN: yaml2obj %s --docnum=7 -o %t8 # RUN: llvm-readobj --dyn-syms %t8 2>&1 \ # RUN: | FileCheck -DFILE=%t8 --implicit-check-not=warning --check-prefix=VERSION-OVERFLOW-LLVM %s # RUN: llvm-readelf --dyn-syms %t8 2>&1 \ # RUN: | FileCheck -DFILE=%t8 --implicit-check-not=warning --check-prefix=VERSION-OVERFLOW-GNU %s # VERSION-OVERFLOW-LLVM: DynamicSymbols [ # VERSION-OVERFLOW-LLVM-NEXT: warning: '[[FILE]]': SHT_GNU_versym section refers to a version index 255 which is missing # VERSION-OVERFLOW-LLVM-NEXT: Symbol { # VERSION-OVERFLOW-LLVM-NEXT: Name: @ (0) # VERSION-OVERFLOW-LLVM: warning: '[[FILE]]': SHT_GNU_versym section refers to a version index 254 which is missing # VERSION-OVERFLOW-LLVM-NEXT: Symbol { # VERSION-OVERFLOW-LLVM-NEXT: Name: foo@ (5) # VERSION-OVERFLOW-LLVM: Symbol { # VERSION-OVERFLOW-LLVM-NEXT: Name: bar@ (1) # VERSION-OVERFLOW-GNU: Symbol table '.dynsym' contains 3 entries: # VERSION-OVERFLOW-GNU-NEXT: Num: Value Size Type Bind Vis Ndx Name # VERSION-OVERFLOW-GNU-NEXT: warning: '[[FILE]]': SHT_GNU_versym section refers to a version index 255 which is missing # VERSION-OVERFLOW-GNU-NEXT: 0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND @ # VERSION-OVERFLOW-GNU-NEXT: warning: '[[FILE]]': SHT_GNU_versym section refers to a version index 254 which is missing # VERSION-OVERFLOW-GNU-NEXT: 1: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND foo@ # VERSION-OVERFLOW-GNU-NEXT: 2: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND bar@