xref: /llvm-project/llvm/test/tools/yaml2obj/ELF/program-header-nobits.yaml (revision a7a447be0fa934505f0c423fb97b91a68c1cc715)

## In this test we check that we allocate file space for SHT_NOBITS sections when
## there are non-nobits sections in the same segment after them. When an object has
## multiple segments, we check each and allocate the space if at least one matches the
## condition mentioned.

## Case A. In this case there are no non-nobits sections after SHT_NOBITS sections in segments.
##         Because of this the file space for SHT_NOBITS sections is not allocated.
# RUN: yaml2obj %s -D SEC1=.data.before -D SEC2=.nobits.1 -o %t1
# RUN: llvm-readelf --sections --segments %t1 | FileCheck %s --check-prefix=NO-ALLOC

# NO-ALLOC:      [Nr] Name         Type     Address          Off    Size
# NO-ALLOC:      [ 1] .data.before PROGBITS 0000000000000000 0000b0 000001
# NO-ALLOC-NEXT: [ 2] .nobits.1    NOBITS   0000000000000001 0000b1 000002
# NO-ALLOC-NEXT: [ 3] .data.after  PROGBITS 0000000000000003 0000b1 000003
# NO-ALLOC-NEXT: [ 4] .nobits.2    NOBITS   0000000000000006 0000b4 000004
## .fill of size 0x5 is placed here.
# NO-ALLOC-NEXT: [ 5] .data.last   PROGBITS 000000000000000f 0000b9 000006

# NO-ALLOC:       Type Offset   VirtAddr           PhysAddr           FileSiz  MemSiz
# NO-ALLOC-NEXT:  LOAD 0x0000b0 0x0000000000000000 0x0000000000000000 0x000001 0x000003
# NO-ALLOC-NEXT:  LOAD 0x0000b0 0x0000000000000000 0x0000000000000000 0x000001 0x000003

## Case B. We have a segment that has a non-nobits section after the SHT_NOBITS section ".nobits.1".
##         The file space is allocated for it, but not for ".nobits.2",
##         which does not belong to any segment.
# RUN: yaml2obj %s -D SEC1=.nobits.1 -D SEC2=.data.after -o %t2
# RUN: llvm-readelf --sections --segments %t2 | FileCheck %s --check-prefix=ALLOC-FIRST

# ALLOC-FIRST:      [Nr] Name         Type     Address          Off    Size
# ALLOC-FIRST:      [ 1] .data.before PROGBITS 0000000000000000 0000b0 000001
# ALLOC-FIRST-NEXT: [ 2] .nobits.1    NOBITS   0000000000000001 0000b1 000002
# ALLOC-FIRST-NEXT: [ 3] .data.after  PROGBITS 0000000000000003 0000b3 000003
# ALLOC-FIRST-NEXT: [ 4] .nobits.2    NOBITS   0000000000000006 0000b6 000004
## .fill of size 0x5 is placed here.
# ALLOC-FIRST-NEXT: [ 5] .data.last   PROGBITS 000000000000000f 0000bb 000006

# ALLOC-FIRST:       Type Offset   VirtAddr           PhysAddr           FileSiz  MemSiz
# ALLOC-FIRST-NEXT:  LOAD 0x0000b0 0x0000000000000000 0x0000000000000000 0x000001 0x000003
# ALLOC-FIRST-NEXT:  LOAD 0x0000b1 0x0000000000000000 0x0000000000000000 0x000005 0x000005

## Case C. We have a Fill after the ".nobits.2" section. In this case the file space is
##         allocated for it, because fills are handled just like any other non-nobits sections.
# RUN: yaml2obj %s -D SEC1=.nobits.2 -D SEC2=.fill -o %t3
# RUN: llvm-readelf --sections --segments %t3 | FileCheck %s --check-prefix=FILL-AT-END

# FILL-AT-END: [Nr] Name       Type     Address          Off    Size
# FILL-AT-END: [ 4] .nobits.2  NOBITS   0000000000000006 0000b4 000004
## .fill of size 0x5 is placed here.
# FILL-AT-END: [ 5] .data.last PROGBITS 000000000000000f 0000bd 000006

# FILL-AT-END:      Type Offset   VirtAddr           PhysAddr           FileSiz  MemSiz
# FILL-AT-END-NEXT: LOAD 0x0000b0 0x0000000000000000 0x0000000000000000 0x000001 0x000003
# FILL-AT-END-NEXT: LOAD 0x0000b4 0x0000000000000000 0x0000000000000000 0x000009 0x000009

--- !ELF
FileHeader:
  Class: ELFCLASS64
  Data:  ELFDATA2LSB
  Type:  ET_EXEC
Sections:
  - Name:  .data.before
    Type:  SHT_PROGBITS
    Flags: [ SHF_ALLOC ]
    Size:  0x1
  - Name:  .nobits.1
    Type:  SHT_NOBITS
    Flags: [ SHF_ALLOC ]
    Size:  0x2
  - Name:  .data.after
    Type:  SHT_PROGBITS
    Flags: [ SHF_ALLOC ]
    Size:  0x3
  - Name:  .nobits.2
    Type:  SHT_NOBITS
    Flags: [ SHF_ALLOC ]
    Size:  0x4
  - Type:    Fill
    Name:    .fill
    Pattern: "00"
    Size:    5
  - Name:  .data.last
    Type:  SHT_PROGBITS
    Flags: [ SHF_ALLOC ]
    Size:  0x6
ProgramHeaders:
## We have 2 segments, the first is predefined and the second can be customized.
## We want to have more than one segment to show we check all of them when
## trying to find a non-nobits section after a nobits one.
  - Type:     PT_LOAD
    Flags:    [ PF_R ]
    FirstSec: .data.before
    LastSec:  .nobits.1
  - Type:     PT_LOAD
    Flags:    [ PF_R ]
    FirstSec: [[SEC1]]
    LastSec:  [[SEC2]]

## Case D. We have a segment with SHT_NOBITS sections on its borders and one
##         non-nobits in the middle. Check we allocate the file space only for
##         the first nobits section.

# RUN: yaml2obj --docnum=2 %s -o %t4
# RUN: llvm-readelf --sections --segments %t4 | FileCheck %s --check-prefix=MIDDLE

# MIDDLE:      [Nr] Name      Type     Address          Off    Size
# MIDDLE:      [ 1] .nobits.1 NOBITS   0000000000000000 000078 000001
# MIDDLE-NEXT: [ 2] .data     PROGBITS 0000000000000001 000079 000010
# MIDDLE-NEXT: [ 3] .nobits.2 NOBITS   0000000000000011 000089 000100
# MIDDLE-NEXT: [ 4] .strtab   STRTAB   0000000000000000 000089 000001

# MIDDLE:      Type Offset   VirtAddr           PhysAddr           FileSiz  MemSiz
# MIDDLE-NEXT: LOAD 0x000078 0x0000000000000000 0x0000000000000000 0x000011 0x000111

--- !ELF
FileHeader:
  Class: ELFCLASS64
  Data:  ELFDATA2LSB
  Type:  ET_EXEC
Sections:
  - Name:  .nobits.1
    Type:  SHT_NOBITS
    Flags: [ SHF_ALLOC ]
    Size:  0x1
  - Name:  .data
    Type:  SHT_PROGBITS
    Flags: [ SHF_ALLOC ]
    Size:  0x10
  - Name:  .nobits.2
    Type:  SHT_NOBITS
    Flags: [ SHF_ALLOC ]
    Size:  0x100
ProgramHeaders:
  - Type:     PT_LOAD
    Flags:    [ PF_R ]
    FirstSec: .nobits.1
    LastSec:  .nobits.2