section-size-content.yaml 4.19 KB
## For regular sections, it is common to specify `Size` and/or `Content` fields in YAML.
## Here we test the behavior in different cases.

## In this case, we have both `Content` and `Size` fields specified and `Size`
## is less than content size. Check we report an error.

# RUN: not yaml2obj --docnum=1 %s -o %t1 2>&1 | FileCheck %s --check-prefix=ERR
# ERR: error: Section size must be greater than or equal to the content size

--- !ELF
FileHeader:
  Class:   ELFCLASS64
  Data:    ELFDATA2LSB
  Type:    ET_DYN
  Machine: EM_X86_64
Sections:
  - Name:    .foo
    Type:    SHT_PROGBITS
    Content: "FF"
    Size:    0

## In this case, we have both `Content` and `Size` fields specified and
## `Size` is equal to the content size. We check that this is allowed and
## that the output section has a correct size value.

# RUN: yaml2obj --docnum=2 %s -o %t2
# RUN: llvm-readobj --section-data -S %t2 | FileCheck %s --check-prefix=CASE2

# CASE2:      Name: .foo
# CASE2-NEXT: Type: SHT_PROGBITS
# CASE2-NEXT: Flags [
# CASE2-NEXT: ]
# CASE2-NEXT: Address: 0x0
# CASE2-NEXT: Offset: 0x40
# CASE2-NEXT: Size: 1
# CASE2-NEXT: Link: 0
# CASE2-NEXT: Info: 0
# CASE2-NEXT: AddressAlignment: 0
# CASE2-NEXT: EntrySize: 0
# CASE2-NEXT: SectionData (
# CASE2-NEXT:   0000: FF
# CASE2-NEXT: )

--- !ELF
FileHeader:
  Class:   ELFCLASS64
  Data:    ELFDATA2LSB
  Type:    ET_DYN
  Machine: EM_X86_64
Sections:
  - Name:    .foo
    Type:    SHT_PROGBITS
    Content: "FF"
    Size:    1

## Check we can specify only `Content`.

# RUN: yaml2obj --docnum=3 %s -o %t3
# RUN: llvm-readobj --section-data -S %t3 | FileCheck %s --check-prefix=CASE2

--- !ELF
FileHeader:
  Class:   ELFCLASS64
  Data:    ELFDATA2LSB
  Type:    ET_DYN
  Machine: EM_X86_64
Sections:
  - Name:    .foo
    Type:    SHT_PROGBITS
    Content: "FF"

## Check we can specify only `Size`.

# RUN: yaml2obj --docnum=4 %s -o %t4
# RUN: llvm-readobj --section-data -S %t4 | FileCheck %s --check-prefix=CASE3

# CASE3:      Name: .foo
# CASE3-NEXT: Type: SHT_PROGBITS
# CASE3-NEXT: Flags [
# CASE3-NEXT: ]
# CASE3-NEXT: Address: 0x0
# CASE3-NEXT: Offset: 0x40
# CASE3-NEXT: Size: 1
# CASE3-NEXT: Link: 0
# CASE3-NEXT: Info: 0
# CASE3-NEXT: AddressAlignment: 0
# CASE3-NEXT: EntrySize: 0
# CASE3-NEXT: SectionData (
# CASE3-NEXT:   0000: 00
# CASE3-NEXT: )

--- !ELF
FileHeader:
  Class:   ELFCLASS64
  Data:    ELFDATA2LSB
  Type:    ET_DYN
  Machine: EM_X86_64
Sections:
  - Name: .foo
    Type: SHT_PROGBITS
    Size: 1

## Check we can specify both `Size` and `Content` when size is greater
## than content size. In this case zeroes are added as padding
## after the specified content.

# RUN: yaml2obj --docnum=5 %s -o %t5
# RUN: llvm-readobj --section-data -S %t5 | FileCheck %s --check-prefix=CASE4

# CASE4:      Name: .foo
# CASE4-NEXT: Type: SHT_PROGBITS
# CASE4-NEXT: Flags [
# CASE4-NEXT: ]
# CASE4-NEXT: Address: 0x0
# CASE4-NEXT: Offset: 0x40
# CASE4-NEXT: Size: 3
# CASE4-NEXT: Link: 0
# CASE4-NEXT: Info: 0
# CASE4-NEXT: AddressAlignment: 0
# CASE4-NEXT: EntrySize: 0
# CASE4-NEXT: SectionData (
# CASE4-NEXT:   0000: FF0000
# CASE4-NEXT: )

--- !ELF
FileHeader:
  Class:   ELFCLASS64
  Data:    ELFDATA2LSB
  Type:    ET_DYN
  Machine: EM_X86_64
Sections:
  - Name:    .foo
    Type:    SHT_PROGBITS
    Content: "FF"
    Size:    3

## Check we emit an empty section if neither 'Content' nor 'Size' were set.

# RUN: yaml2obj --docnum=6 %s -o %t6
# RUN: llvm-readobj %t6 --sections | FileCheck %s --check-prefix=CASE5

# CASE5:      Name: .foo
# CASE5-NEXT: Type: SHT_PROGBITS
# CASE5-NEXT: Flags [
# CASE5-NEXT: ]
# CASE5-NEXT: Address: 0x0
# CASE5-NEXT: Offset: 0x40
# CASE5-NEXT: Size: 0

--- !ELF
FileHeader:
  Class:   ELFCLASS64
  Data:    ELFDATA2LSB
  Type:    ET_DYN
  Machine: EM_X86_64
Sections:
  - Name: .foo
    Type: SHT_PROGBITS

# RUN: not yaml2obj --docnum=7 %s 2>&1 | FileCheck %s --check-prefix=ERR2

--- !ELF
FileHeader:
  Class: ELFCLASS64
  Data: ELFDATA2LSB
  Type: ET_REL
  Machine: EM_X86_64
Sections:
  - Name: .data
    Type: SHT_PROGBITS
    Flags: [ SHF_ALLOC ]
    Content: 0000000000000000
    Size: 2

# ERR2:      error: Section size must be greater than or equal to the content size
# ERR2-NEXT: - Name: .data
# ERR2-NEXT:   ^
# ERR2-NEXT: error: failed to parse YAML input