llvm/test/tools/yaml2obj/ELF/section-headers-exclude.yaml

## 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
  - Type: 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
Sections:
  - Type: 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] <no-strings> NULL 0000000000000000 000000 000000 00      0   0  0

--- !ELF
FileHeader:
  Class: ELFCLASS64
  Data:  ELFDATA2LSB
  Type:  ET_REL
Sections:
  - Type: 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
Sections:
  - Type: 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
  - Type: 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
  - Type: 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
  - Type: 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
  - Type: 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
  - Type: 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: []
  - Type: 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
  - Type: 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
  - Type: SectionHeaderTable
    Sections:
      - Name: .symtab
      - Name: .strtab
      - Name: .shstrtab
    Excluded:
      - Name: .foo
Symbols:
  - Name:    foo
    Type:    STT_OBJECT
    Section: .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
  - Type: 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
  - Type: 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 08      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
  - Type: 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
  - Type: 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
  - Type: 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
Sections:
  - Type: 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 Offset/Sections/Excluded

--- !ELF
FileHeader:
  Class: ELFCLASS64
  Data:  ELFDATA2LSB
  Type:  ET_REL
Sections:
  - Type: SectionHeaderTable
    NoHeaders: [[NOHEADERS]]
    Excluded:  []