## Here we check that we are able to define sections with a type of "Fill".
## Fills are custom pieces of data that can be placed anywhere just like normal
## output sections, but they are not real output sections and you'll never see them in
## the section headers.
## Check we can create named and unnamed fills and use "Pattern" and "Size" fields
## to describe the data emitted.
## Check the data emitted and how it affects regular sections offsets.
## Check that the "Name" field is optional for fills.
## Check that "Size" can be greater than or equal to the pattern data size.
# RUN: yaml2obj --docnum=1 %s -o %t1
# RUN: llvm-readelf --sections --headers %t1 | FileCheck %s --check-prefix=BASIC
# BASIC: Number of section headers: 5
# BASIC: Section Headers:
# BASIC-NEXT: [Nr] Name Type Address Off Size ES Flg Lk Inf Al
# BASIC-NEXT: [ 0] NULL 0000000000000000 000000 000000 00 0 0 0
# BASIC-NEXT: [ 1] .foo PROGBITS 0000000000000000 000043 000002 00 0 0 0
# BASIC-NEXT: [ 2] .bar PROGBITS 0000000000000000 000049 000001 00 0 0 0
# BASIC-NEXT: [ 3] .strtab STRTAB 0000000000000000 00004b 000001 00 0 0 1
# BASIC-NEXT: [ 4] .shstrtab STRTAB 0000000000000000 00004c 00001d 00 0 0 1
## The fill we dump starts at (offset of .foo - 3), which is (0x43 - 3) = 0x40.
# RUN: od -t x1 -v -j 0x40 -N 11 %t1 | FileCheck %s --ignore-case --check-prefix=DATA
# DATA: aa bb aa 11 22 cc dd cc dd ff ee
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_DYN
Sections:
- Type: Fill
Pattern: "AABB"
Size: 0x3
- Name: .foo
Type: SHT_PROGBITS
Content: "1122"
- Type: Fill
Name: unusedName
Pattern: "CCDD"
Size: 4
- Name: .bar
Type: SHT_PROGBITS
Content: "FF"
- Type: Fill
Pattern: "EE"
Size: 1
## Check we can have no explicit regular sections in the YAML description, and can
## describe the content with the use of fills only.
## Check that "Size" can be less than the pattern data size.
# RUN: yaml2obj --docnum=2 %s -o %t2
# RUN: llvm-readelf --sections --headers %t2 | FileCheck %s --check-prefix=NOSECTIONS
## The fill we dump starts at (offset of .strtab - 3 - 2), which is (0x45 - 5) = 0x40.
# RUN: od -t x1 -v -j 0x40 -N 6 %t2 | FileCheck %s --ignore-case --check-prefix=NOSECTIONS-DATA
# NOSECTIONS: Number of section headers: 3
# NOSECTIONS: Section Headers:
# NOSECTIONS-NEXT: [Nr] Name Type Address Off Size ES Flg Lk Inf Al
# NOSECTIONS-NEXT: [ 0] NULL 0000000000000000 000000 000000 00 0 0 0
# NOSECTIONS-NEXT: [ 1] .strtab STRTAB 0000000000000000 000045 000001 00 0 0 1
# NOSECTIONS-NEXT: [ 2] .shstrtab STRTAB 0000000000000000 000046 000013 00 0 0 1
## .strtab that follows fills starts at 0x46 and always has a null character at the begining.
# NOSECTIONS-DATA: aa bb cc dd ee 00
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_DYN
Sections:
- Type: Fill
Pattern: "AABBCCFF"
Size: 0x3
- Type: Fill
Pattern: "DDEEFF"
Size: 0x2
## Check we can use named fills when describing program headers.
## Check that fills consume the file size and therefore affect the p_filesz fields of segments.
## Check that the fill does not affect the p_align field of the segment.
# RUN: yaml2obj --docnum=3 %s -o %t3
# RUN: llvm-readelf --sections --program-headers %t3 | FileCheck %s --check-prefix=PHDR
# PHDR: [Nr] Name Type Address Off Size ES Flg Lk Inf Al
# PHDR: [ 0] NULL 0000000000000000 000000 000000 00 0 0 0
# PHDR: [ 1] .bar PROGBITS 0000000000000100 0000c0 000005 00 0 0 2
# PHDR: [ 2] .strtab STRTAB 0000000000000000 00010a 000001 00 0 0 1
# PHDR: [ 3] .shstrtab STRTAB 0000000000000000 00010b 000018 00 0 0 1
# PHDR: Program Headers:
# PHDR: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
# PHDR: LOAD 0x0000b0 0x0000000000000100 0x0000000000000100 0x00005a 0x00005a 0x2
# PHDR: GNU_RELRO 0x0000c5 0x0000000000000105 0x0000000000000105 0x000045 0x000045 0x1
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_DYN
Sections:
- Type: Fill
Name: fill1
Pattern: ""
Size: 0x10
- Name: .bar
Type: SHT_PROGBITS
Size: 0x5
Address: 0x100
AddressAlign: 2
- Type: Fill
Name: fill2
Pattern: ""
Size: 0x45
ProgramHeaders:
- Type: PT_LOAD
VAddr: 0x100
FirstSec: fill1
LastSec: fill2
- Type: PT_GNU_RELRO
VAddr: 0x105
FirstSec: fill2
LastSec: fill2
## Check that the "Pattern" field is not mandatory.
# RUN: yaml2obj --docnum=4 2>&1 -o %t4 %s
# RUN: llvm-readelf --sections %t4 | FileCheck %s --check-prefix=NOPATTERN
## The fill we dump starts at (offset of .strtab - 1 - 3 - 1), which is (0x45 - 5) = 0x40.
# RUN: od -t x1 -v -j 0x40 -N 5 %t4 | FileCheck %s --ignore-case --check-prefix=NOPATTERN-DATA
# NOPATTERN: [Nr] Name Type Address Off
# NOPATTERN: [ 1] .strtab STRTAB 0000000000000000 000045
# NOPATTERN-DATA: aa 00 00 00 bb
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_DYN
Sections:
- Type: Fill
Size: 0x1
Pattern: "AA"
- Type: Fill
Size: 0x3
- Type: Fill
Size: 0x1
Pattern: "BB"
## Check that the "Size" field is mandatory.
# RUN: not yaml2obj --docnum=5 2>&1 %s | FileCheck %s --check-prefix=NOSIZE
## NOSIZE: error: missing required key 'Size'
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_DYN
Sections:
- Type: Fill
Pattern: "00"
## Check that fills are not allowed to have duplicate names.
# RUN: not yaml2obj --docnum=6 2>&1 %s | FileCheck %s --check-prefix=UNIQUE-NAME
# UNIQUE-NAME: error: repeated section/fill name: 'foo' at YAML section/fill number 2
# UNIQUE-NAME: error: repeated section/fill name: 'foo' at YAML section/fill number 3
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_DYN
Sections:
- Type: Fill
Name: foo
Pattern: "00"
Size: 1
- Type: Fill
Name: foo
Pattern: "00"
Size: 1
- Name: foo
Type: SHT_PROGBITS
## Check that "Pattern" can be empty, when "Size" is zero.
# RUN: yaml2obj --docnum=7 2>&1 %s -o %t7
# RUN: llvm-readelf --sections %t7 | FileCheck %s --check-prefix=NOOP
# NOOP: [Nr] Name Type Address Off
# NOOP: [ 1] begin PROGBITS 0000000000000000 000040
# NOOP: [ 2] end PROGBITS 0000000000000000 000041
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_DYN
Sections:
- Name: begin
Type: SHT_PROGBITS
Size: 1
- Type: Fill
Pattern: ""
Size: 0
- Name: end
Type: SHT_PROGBITS
Size: 1
## Check that we can have an empty "Pattern", but have non-zero "Size".
## In this case we emit Size number of zeroes to the output.
# RUN: yaml2obj --docnum=8 2>&1 -o %t8 %s
# RUN: llvm-readelf --sections %t8 | FileCheck %s --check-prefix=EMPTY-PATTERN
## The fill we dump starts at (offset of .strtab - 1 - 3 - 1), which is (0x45 - 5) = 0x40.
# RUN: od -t x1 -v -j 0x40 -N 5 %t8 | FileCheck %s --ignore-case --check-prefix=EMPTY-PATTERN-DATA
# EMPTY-PATTERN: Section Headers:
# EMPTY-PATTERN-NEXT: [Nr] Name Type Address Off Size ES Flg Lk Inf Al
# EMPTY-PATTERN-NEXT: [ 0] NULL 0000000000000000 000000 000000 00 0 0 0
# EMPTY-PATTERN-NEXT: [ 1] .strtab STRTAB 0000000000000000 000045 000001 00 0 0 1
# EMPTY-PATTERN-DATA: aa 00 00 00 bb
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_DYN
Sections:
- Type: Fill
Pattern: "AA"
Size: 0x1
- Type: Fill
Size: 3
Pattern: ""
- Type: Fill
Pattern: "BB"
Size: 0x1
## Check that "Size" can't be 0, when "Pattern" is not empty.
# RUN: not yaml2obj --docnum=9 2>&1 %s | FileCheck %s --check-prefix=ZERO-SIZE-ERR
# ZERO-SIZE-ERR: error: "Size" can't be 0 when "Pattern" is not empty
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_DYN
Sections:
- Type: Fill
Pattern: "00"
Size: 0
## Check we report an error when a program header references
## an unknown section or fill and have at least one Fill defined.
# RUN: not yaml2obj --docnum=10 2>&1 %s | FileCheck %s --check-prefix=UNKNOWN-ERR
# UNKNOWN-ERR: error: unknown section or fill referenced: 'fill' by the 'FirstSec' key of the program header with index 0
# UNKNOWN-ERR: error: unknown section or fill referenced: 'fill' by the 'LastSec' key of the program header with index 0
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_DYN
Sections:
- Type: Fill
Pattern: ""
Size: 0
ProgramHeaders:
- Type: PT_LOAD
FirstSec: fill
LastSec: fill
## Show that we can use the "Offset" key to set an arbitrary offset for a Fill.
## 0x41 is the minimal possible valid offset for Fill,
## because the .foo section of size 0x1 is placed at 0x40.
# RUN: yaml2obj --docnum=11 -DOFFSET=0x41 -o %t11 %s
# RUN: llvm-readelf --section-headers %t11 | FileCheck %s --check-prefix=OFFSET-MIN
## 0x123 is an arbitrary offset.
# RUN: yaml2obj --docnum=11 -DOFFSET=0x123 -o %t12 %s
# RUN: llvm-readelf --section-headers %t12 | FileCheck %s --check-prefix=OFFSET
# OFFSET-MIN: Section Headers:
# OFFSET-MIN-NEXT: [Nr] Name Type Address Off Size
# OFFSET-MIN-NEXT: [ 0] NULL 0000000000000000 000000 000000
# OFFSET-MIN-NEXT: [ 1] .foo PROGBITS 0000000000000000 000040 000001
# OFFSET-MIN-NEXT: [ 2] .bar PROGBITS 0000000000000000 000042 000001
# OFFSET: Section Headers:
# OFFSET-NEXT: [Nr] Name Type Address Off Size
# OFFSET-NEXT: [ 0] NULL 0000000000000000 000000 000000
# OFFSET-NEXT: [ 1] .foo PROGBITS 0000000000000000 000040 000001
# OFFSET-NEXT: [ 2] .bar PROGBITS 0000000000000000 000124 000001
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_DYN
Sections:
- Name: .foo
Type: SHT_PROGBITS
Size: 1
- Type: Fill
Pattern: "AA"
Size: 0x1
Offset: [[OFFSET]]
- Name: .bar
Type: SHT_PROGBITS
Size: 1
## Show that the "Offset" value can't go backward.
# RUN: not yaml2obj --docnum=11 -DOFFSET=0x40 2>&1 %s | FileCheck %s --check-prefix=OFFSET-ERR
# OFFSET-ERR: error: the 'Offset' value (0x40) goes backward
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