## Check how we can use the "Excluded" key of the "SectionHeaderTable" tag to exclude ## entries from the section header table. ## Check we can use the "Excluded" key to omit a section from the section header table. ## Check we do not include the name of the excluded section in the string table. # RUN: yaml2obj %s -DINCLUDED=.foo -DEXCLUDED=.bar --docnum=1 -o %t1 # RUN: llvm-readelf --section-headers -p .shstrtab %t1 | \ # RUN: FileCheck %s -DSEC=.foo --check-prefixes=INCLUDE-SEC,INCLUDE-FOO # RUN: yaml2obj %s -DINCLUDED=.bar -DEXCLUDED=.foo --docnum=1 -o %t2 # RUN: llvm-readelf --section-headers -p .shstrtab %t2 | \ # RUN: FileCheck %s -DSEC=.bar --check-prefixes=INCLUDE-SEC,INCLUDE-BAR # INCLUDE-SEC: [Nr] Name # INCLUDE-SEC: [ 1] [[SEC]] # INCLUDE-SEC-NEXT: [ 2] .strtab # INCLUDE-SEC-NEXT: [ 3] .shstrtab # INCLUDE-SEC: String dump of section '.shstrtab': # INCLUDE-FOO-NEXT: [ 1] .foo # INCLUDE-BAR-NEXT: [ 1] .bar # INCLUDE-SEC-NEXT: [ 6] .shstrtab # INCLUDE-SEC-NEXT: [ 10] .strtab # INCLUDE-SEC-NOT: {{.}} --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_REL Sections: - Name: .foo Type: SHT_PROGBITS - Name: .bar Type: SHT_PROGBITS SectionHeaderTable: Sections: - Name: [[INCLUDED]] - Name: .strtab - Name: .shstrtab Excluded: - Name: [[EXCLUDED]] ## Check we report an error when a section is in both the "Sections" and "Excluded" lists at the same time. ## Also check that we report an error if a section is missing from the lists. # RUN: not yaml2obj %s -DINCLUDED=.bar -DEXCLUDED=.strtab --docnum=1 -o /dev/null 2>&1 | \ # RUN: FileCheck %s --check-prefix=EXCLUDE-INCLUDED # EXCLUDE-INCLUDED: error: repeated section name: '.strtab' in the section header description # EXCLUDE-INCLUDED: error: section '.foo' should be present in the 'Sections' or 'Excluded' lists ## Check we report an error when the `Excluded` key mentions an unknown section. # RUN: not yaml2obj %s -DINCLUDED=.bar -DEXCLUDED=.unknown --docnum=1 -o /dev/null 2>&1 | \ # RUN: FileCheck %s --check-prefix=EXCLUDE-UNKNOWN # EXCLUDE-UNKNOWN: error: section '.foo' should be present in the 'Sections' or 'Excluded' lists # EXCLUDE-UNKNOWN: error: section header contains undefined section '.unknown' ## Check we report an error when the `Excluded` key mentions a section more than once. # RUN: not yaml2obj %s --docnum=2 -o /dev/null 2>&1 | FileCheck %s --check-prefix=EXCLUDE-TWICE # EXCLUDE-TWICE: error: repeated section name: '.strtab' in the section header description # EXCLUDE-TWICE: error: repeated section name: '.strtab' in the section header description --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_REL SectionHeaderTable: Sections: - Name: .strtab - Name: .shstrtab Excluded: - Name: .strtab - Name: .strtab ## Check that we are able to exclude all sections, except the implicit ## null section, with the use of the "Excluded" key. ## Case A: the "Sections" key is present, but empty. # RUN: yaml2obj %s --docnum=3 -o %t3 # RUN: llvm-readelf --section-headers %t3 | FileCheck %s --check-prefix=NO-SECTIONS # NO-SECTIONS: There are 1 section headers, starting at offset 0x48: # NO-SECTIONS: Section Headers: # NO-SECTIONS-NEXT: [Nr] Name Type Address Off Size ES Flg Lk Inf Al # NO-SECTIONS-NEXT: [ 0] NULL 0000000000000000 000000 000000 00 0 0 0 --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_REL SectionHeaderTable: Sections: [] Excluded: - Name: .strtab - Name: .shstrtab ## Case B: the "Sections" key is not present. # RUN: yaml2obj %s --docnum=4 -o %t4 # RUN: llvm-readelf --section-headers %t4 | FileCheck %s --check-prefix=NO-SECTIONS --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_REL SectionHeaderTable: Excluded: - Name: .strtab - Name: .shstrtab ## Check how we handle cases when a section is excluded, but its section index is needed. ## The general rule is: when a section is explicitly linked with another section, which is ## excluded, then we report an error. In the case when it is linked implicitly with an excluded ## section, we use 0 as index value. ## Case A: check we report an error when a regular section has a Link field which ## points to an excluded section. # RUN: not yaml2obj %s --docnum=5 -o /dev/null 2>&1 | \ # RUN: FileCheck %s --check-prefix=LINK -DSEC=.foo -DTARGET=.bar # LINK: error: unable to link '[[SEC]]' to excluded section '[[TARGET]]' --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_REL Sections: - Name: .foo Type: SHT_PROGBITS Link: .bar - Name: .bar Type: SHT_PROGBITS SectionHeaderTable: Sections: - Name: .foo - Name: .strtab - Name: .shstrtab Excluded: - Name: .bar ## Case B.1: check we report an error when a symbol table section has a Link field which ## points to an excluded section. # RUN: not yaml2obj %s --docnum=6 -DNAME=.symtab -DTYPE=SHT_SYMTAB -o /dev/null 2>&1 | \ # RUN: FileCheck %s --check-prefix=LINK -DSEC=.symtab -DTARGET=.foo # RUN: not yaml2obj %s --docnum=6 -DNAME=.dynsym -DTYPE=SHT_DYNSYM -o /dev/null 2>&1 | \ # RUN: FileCheck %s --check-prefix=LINK -DSEC=.dynsym -DTARGET=.foo --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_DYN Sections: - Name: [[NAME]] Type: [[TYPE]] Link: .foo - Name: .foo Type: SHT_PROGBITS SectionHeaderTable: Sections: - Name: [[NAME]] - Name: .strtab - Name: .shstrtab Excluded: - Name: .foo ## Case B.2: check we do not link .dynsym with .dynstr implicitly when the latter is excluded. # RUN: yaml2obj %s --docnum=7 -o %t5 # RUN: llvm-readelf %t5 --section-headers | FileCheck %s --check-prefix=LINK-DYNSYM # LINK-DYNSYM: [Nr] Name Type Address Off Size ES Flg Lk # LINK-DYNSYM: [ 1] .dynsym DYNSYM 0000000000000000 000040 000018 18 A 0 --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_DYN Sections: - Name: .dynsym Type: SHT_DYNSYM - Name: .dynstr Type: SHT_PROGBITS SectionHeaderTable: Sections: - Name: .dynsym - Name: .strtab - Name: .shstrtab Excluded: - Name: .dynstr ## Case B.3: check we do not link .symtab with .strtab implicitly when the latter is excluded. # RUN: yaml2obj %s --docnum=8 -o %t6 # RUN: llvm-readelf %t6 --section-headers | FileCheck %s --check-prefix=LINK-SYMTAB # LINK-SYMTAB: [Nr] Name Type Address Off Size ES Flg Lk Inf Al # LINK-SYMTAB: [ 1] .symtab SYMTAB 0000000000000000 000040 000018 18 0 1 0 --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_DYN Sections: - Name: .symtab Type: SHT_SYMTAB - Name: .strtab Type: SHT_PROGBITS SectionHeaderTable: Sections: - Name: .symtab - Name: .shstrtab Excluded: - Name: .strtab ## Case C: check we report an error when a debug section has a Link field which ## points to an excluded section. # RUN: not yaml2obj %s --docnum=9 -o /dev/null 2>&1 | \ # RUN: FileCheck %s --check-prefix=LINK -DSEC=.debug_unknown -DTARGET=.strtab --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_EXEC Sections: - Name: .debug_unknown Type: SHT_PROGBITS Link: .strtab SectionHeaderTable: Sections: - Name: .debug_unknown - Name: .shstrtab Excluded: - Name: .strtab ## Case D.1: check we report an error when a relocatable section has an Info field which ## points to an excluded section. # RUN: not yaml2obj %s --docnum=10 -o /dev/null 2>&1 | \ # RUN: FileCheck %s --check-prefix=LINK -DSEC=.rela -DTARGET=.strtab --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_DYN Sections: - Name: .rela Type: SHT_RELA Info: .strtab Relocations: [] SectionHeaderTable: Sections: - Name: .rela - Name: .shstrtab Excluded: - Name: .strtab ## Case D.2: check we report an error when the SHT_REL[A] section is linked ## with an excluded section explicitly. # RUN: not yaml2obj %s --docnum=11 -o /dev/null 2>&1 | \ # RUN: FileCheck %s --check-prefix=LINK -DSEC=.rela -DTARGET=.symtab --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_DYN Sections: - Name: .rela Type: SHT_RELA Link: .symtab Relocations: [] - Name: .symtab Type: SHT_PROGBITS SectionHeaderTable: Sections: - Name: .rela - Name: .strtab - Name: .shstrtab Excluded: - Name: .symtab ## Case E: check we report an error when a symbol references an excluded section. # RUN: not yaml2obj %s --docnum=12 -o /dev/null 2>&1 | \ # RUN: FileCheck %s --check-prefix=SYMBOL-SECTION # SYMBOL-SECTION: error: excluded section referenced: '.foo' by symbol 'foo' --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_DYN Sections: - Name: .foo Type: SHT_PROGBITS Symbols: - Name: foo Type: STT_OBJECT Section: .foo SectionHeaderTable: Sections: - Name: .symtab - Name: .strtab - Name: .shstrtab Excluded: - Name: .foo ## Case F.1: check we report an error when a group section ## contains an excluded section member. # RUN: not yaml2obj %s --docnum=13 -o /dev/null 2>&1 | \ # RUN: FileCheck %s --check-prefix=LINK -DSEC=.group -DTARGET=.strtab --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_REL Sections: - Name: .group Type: SHT_GROUP Members: - SectionOrType: .strtab SectionHeaderTable: Sections: - Name: .group - Name: .shstrtab Excluded: - Name: .strtab ## Case F.2: check we report an error when the group section is linked ## to an excluded section explicitly. # RUN: not yaml2obj %s --docnum=14 -o /dev/null 2>&1 | \ # RUN: FileCheck %s --check-prefix=LINK -DSEC=.group -DTARGET=.symtab --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_REL Sections: - Name: .group Type: SHT_GROUP Link: .symtab Members: [] - Name: .symtab Type: SHT_SYMTAB SectionHeaderTable: Sections: - Name: .group - Name: .strtab - Name: .shstrtab Excluded: - Name: .symtab ## Case G: check we do not link SHT_LLVM_CALL_GRAPH_PROFILE/SHT_LLVM_ADDRSIG/SHT_GROUP/SHT_REL[A] sections ## with .symtab implicitly when the latter is excluded. # RUN: yaml2obj %s --docnum=15 -o %t7 # RUN: llvm-readelf %t7 --section-headers | FileCheck %s --check-prefix=LINK-IMPLICIT # LINK-IMPLICIT: [Nr] Name Type Address Off Size ES Flg Lk Inf Al # LINK-IMPLICIT: [ 1] .cgp LLVM_CALL_GRAPH_PROFILE 0000000000000000 000040 000000 10 0 0 0 # LINK-IMPLICIT-NEXT: [ 2] .llvm_addrsig LLVM_ADDRSIG 0000000000000000 000040 000000 00 0 0 0 # LINK-IMPLICIT-NEXT: [ 3] .group GROUP 0000000000000000 000040 000000 04 0 0 0 # LINK-IMPLICIT-NEXT: [ 4] .rela RELA 0000000000000000 000040 000000 18 0 0 0 --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_DYN Sections: - Name: .cgp Type: SHT_LLVM_CALL_GRAPH_PROFILE Content: "" - Name: .llvm_addrsig Type: SHT_LLVM_ADDRSIG Content: "" - Name: .group Type: SHT_GROUP Members: [] - Name: .rela Type: SHT_RELA Relocations: [] - Name: .symtab Type: SHT_SYMTAB SectionHeaderTable: Sections: - Name: .cgp - Name: .llvm_addrsig - Name: .group - Name: .rela - Name: .strtab - Name: .shstrtab Excluded: - Name: .symtab ## Case H: check we do not link SHT_HASH/SHT_GNU_HASH sections with .dynsym ## implicitly when the latter is excluded. # RUN: yaml2obj %s --docnum=16 -o %t8 # RUN: llvm-readelf %t8 --section-headers | FileCheck %s --check-prefix=LINK-HASH # LINK-HASH: [Nr] Name Type Address Off Size ES Flg Lk Inf Al # LINK-HASH: [ 1] .hash HASH 0000000000000000 000040 000000 04 0 0 0 # LINK-HASH-NEXT: [ 2] .gnu_hash GNU_HASH 0000000000000000 000040 000000 00 0 0 0 --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_DYN Sections: - Name: .hash Type: SHT_HASH Content: "" - Name: .gnu_hash Type: SHT_GNU_HASH Content: "" - Name: .dynsym Type: SHT_DYNSYM SectionHeaderTable: Sections: - Name: .hash - Name: .gnu_hash - Name: .strtab - Name: .shstrtab Excluded: - Name: .dynsym ## Case I: document the case when an excluded section is explicitly linked to another excluded section. ## We report an error in this case, because: ## 1) It is a reasonable behavior, as it is perhaps usually a result of a mistake ## in a YAML description. ## 2) Helps to keep the code simpler. # RUN: not yaml2obj %s --docnum=17 -o /dev/null 2>&1 | FileCheck %s --check-prefix=CROSS-LINK # CROSS-LINK: error: unable to link '.foo' to excluded section '.bar' # CROSS-LINK-NEXT: error: unable to link '.bar' to excluded section '.foo' --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_REL Sections: - Name: .foo Type: SHT_PROGBITS Link: .bar - Name: .bar Type: SHT_PROGBITS Link: .foo SectionHeaderTable: Sections: - Name: .strtab - Name: .shstrtab Excluded: - Name: .foo - Name: .bar ## Check we set e_shstrndx field to 0 when the section header string table is excluded. ## Check that the e_shnum field is adjusted properly when a section is removed. # RUN: yaml2obj --docnum=18 %s -o %t9 # RUN: llvm-readelf --file-headers %t9 | FileCheck %s --check-prefix=SHSTRTAB # SHSTRTAB: Number of section headers: 2 # SHSTRTAB: Section header string table index: 0 --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_REL SectionHeaderTable: Sections: - Name: .strtab Excluded: - Name: .shstrtab ## Check we do not allow using "Excluded" together with "NoHeaders". # RUN: not yaml2obj %s --docnum=19 -DNOHEADERS=true -o /dev/null 2>&1 | FileCheck %s --check-prefix=NOHEADERS # RUN: not yaml2obj %s --docnum=19 -DNOHEADERS=false -o /dev/null 2>&1 | FileCheck %s --check-prefix=NOHEADERS # NOHEADERS: NoHeaders can't be used together with Sections/Excluded --- !ELF FileHeader: Class: ELFCLASS64 Data: ELFDATA2LSB Type: ET_REL SectionHeaderTable: NoHeaders: [[NOHEADERS]] Excluded: []