llvm/test/tools/llvm-objcopy/ELF/update-section.test

# REQUIRES: x86

# RUN: yaml2obj %s -o %t

# RUN: echo -n 11112222 > %t.same
# RUN: echo -n 00000000 > %t.zeros
# RUN: echo -n 11 > %t.short
# RUN: echo -n 11113333 > %t.updated
# RUN: echo -n 111122223 > %t.larger

## Update the segment section with a regular chunk of data the same size as the section.
# RUN: llvm-objcopy --update-section=.in_segment=%t.same %t %t.same.o
# RUN: llvm-readobj --section-headers --section-data --program-headers %t.same.o | \
# RUN:   FileCheck %s --check-prefix=NORMAL

## Show that if we overwrite a given section (.in_segment) with new data, then rewrite it
## back (from the second `--update-section`), then it should be the exact same as the
## original file.
# RUN: llvm-objcopy %t %t.copy.o
# RUN: llvm-objcopy --update-section=.in_segment=%t.same --update-section=.in_segment=%t.zeros %t %t.original.o
# RUN: cmp %t.copy.o %t.original.o

## Update segment section with a smaller chunk of data. This will also update the
## section size to the length of the new data written. This does not affect the offset
## of any subsequent sections in the same segment as this.
# RUN: llvm-objcopy --update-section=.in_segment=%t.short %t %t.short.o
# RUN: llvm-readobj --section-headers --section-data --program-headers %t.short.o | \
# RUN:   FileCheck %s --check-prefix=SHORT

## Ensure the data that was in a shortened section within a segment is still retained.
## For cases where there are gaps in segments not covered by sections, the existing
## contents are preserved.
# RUN: od -t x1 -j 0x78 -N 16 %t.short.o | FileCheck %s --check-prefix=PRESERVED

## Add a new section via --add-section, then update it.
# RUN: llvm-objcopy --add-section=.added=%t.zeros --update-section=.added=%t.updated \
# RUN:   %t %t.updated.o
# RUN: llvm-readobj --section-headers --section-data --program-headers %t.updated.o | \
# RUN:   FileCheck %s --check-prefix=ADD-UPDATE

## Adding should always be first regardless of flag order.
# RUN: llvm-objcopy --update-section=.added=%t.updated --add-section=.added=%t.updated \
# RUN:   %t %t.updated.o
# RUN: llvm-readobj --section-headers --section-data --program-headers %t.updated.o | \
# RUN:   FileCheck %s --check-prefix=ADD-UPDATE

## We can't update sections which don't exist.
# RUN: not llvm-objcopy --update-section=.nosection=%t.same %t %t-err1 2>&1 | \
# RUN:   FileCheck %s --check-prefix=ERR-NO-SECTION

## We can't update certain types of sections.
# RUN: not llvm-objcopy --update-section=.nobits_type=%t.same %t %t-err2 2>&1 | \
# RUN:   FileCheck %s --check-prefix=ERR-NOBITS-TYPE
# RUN: not llvm-objcopy --update-section=.null_type=%t.same %t %t-err2 2>&1 | \
# RUN:   FileCheck %s --check-prefix=ERR-NULL-TYPE

## Fail on trying to insert data larger than the existing section.
# RUN: not llvm-objcopy --update-section=.in_segment=%t.larger %t %t-err3 2>&1 | \
# RUN:   FileCheck %s --check-prefix=ERR-LARGER

## But we can insert larger data if the section is NOT part of a segment.
# RUN: llvm-objcopy --update-section=.not_in_segment=%t.larger %t %t.larger.o
# RUN: llvm-readobj --section-headers --section-data --program-headers %t.larger.o | \
# RUN:   FileCheck %s --check-prefix=LONG

## We should still fail on inserting larger data, even if it is superceded by a
## valid --update-section flag.
# RUN: not llvm-objcopy --update-section=.in_segment=%t.larger --update-section=.in_segment=%t.same %t %t-err3 2>&1 | \
# RUN:   FileCheck %s --check-prefix=ERR-LARGER

## Test option parsing failures.
# RUN: not llvm-objcopy --update-section %t %t.out 2>&1 | FileCheck %s --check-prefix=MISSING-EQ
# RUN: not llvm-objcopy --update-section=.in_segment= %t %t.out 2>&1 | FileCheck %s --check-prefix=MISSING-FILE

!ELF
FileHeader:
  Class:           ELFCLASS64
  Data:            ELFDATA2LSB
  Type:            ET_EXEC
  Machine:         EM_X86_64
Sections:
  - Name:            .in_segment
    Type:            SHT_PROGBITS
    Content:         "3030303030303030"
  - Name:            .unmodified_in_segment
    Type:            SHT_PROGBITS
    Content:         "3130303030303030"
  - Name:            .nobits_type
    Type:            SHT_NOBITS
  - Name:            .not_in_segment
    Type:            SHT_PROGBITS
  - Name:            .null_type
    Type:            SHT_NULL
ProgramHeaders:
  - Type: PT_LOAD
    VAddr: 0x1000
    FirstSec: .in_segment
## The unmodified section is for ensuring that it remains untouched (ie. its
## offset is the same) even when the section before it is shrunk.
    LastSec: .unmodified_in_segment

# NORMAL:      Name: .in_segment
# NORMAL:      Offset:
# NORMAL-SAME:   {{ }}0x78{{$}}
# NORMAL:      Size:
# NORMAL-SAME:   {{ }}8{{$}}
# NORMAL:      SectionData (
# NORMAL-NEXT:   |11112222|
# NORMAL-NEXT: )
# NORMAL:      Name: .unmodified_in_segment
# NORMAL:      Offset:
# NORMAL-SAME:   {{ }}0x80{{$}}
# NORMAL:      Size:
# NORMAL-SAME:   {{ }}8{{$}}
# NORMAL:      SectionData (
# NORMAL-NEXT:   |10000000|
# NORMAL-NEXT: )
# NORMAL:      ProgramHeaders [
# NORMAL-NEXT:   ProgramHeader {
# NORMAL-NEXT:     Type: PT_LOAD (0x1)
# NORMAL:          FileSize:
# NORMAL-SAME:       {{ }}16{{$}}
# NORMAL:          MemSize:
# NORMAL-SAME:       {{ }}16{{$}}
# NORMAL:        }
# NORMAL-NEXT: ]

# SHORT:      Name: .in_segment
# SHORT:      Offset:
# SHORT-SAME:   {{ }}0x78{{$}}
# SHORT:      Size:
# SHORT-SAME:   {{ }}2{{$}}
# SHORT:      SectionData (
# SHORT-NEXT:   |11|
# SHORT-NEXT: )
# SHORT:      Name: .unmodified_in_segment
# SHORT:      Offset:
# SHORT-SAME:   {{ }}0x80{{$}}
# SHORT:      Size:
# SHORT-SAME:   {{ }}8{{$}}
# SHORT:      SectionData (
# SHORT-NEXT:   |10000000|
# SHORT-NEXT: )
# SHORT:      ProgramHeaders [
# SHORT-NEXT:   ProgramHeader {
# SHORT-NEXT:     Type: PT_LOAD (0x1)
# SHORT:          FileSize:
# SHORT-SAME:       {{ }}16{{$}}
# SHORT:          MemSize:
# SHORT-SAME:       {{ }}16{{$}}
# SHORT:        }
# SHORT-NEXT: ]

## The first 8 bytes are the modified section. The last 8 bytes are the
## unmodified section.
# PRESERVED: 31 31 30 30 30 30 30 30 31 30 30 30 30 30 30 30

# LONG:      Name: .not_in_segment
# LONG:      Size:
# LONG-SAME:   {{ }}9{{$}}
# LONG:      SectionData (
# LONG-NEXT:   |111122223|
# LONT-NEXT: )

# ADD-UPDATE:      Name: .added
# ADD-UPDATE:      Size:
# ADD-UPDATE-SAME:   {{ }}8{{$}}
# ADD-UPDATE:      SectionData (
# ADD-UPDATE-NEXT:   |11113333|
# ADD-UPDATE:      )

# ERR-NO-SECTION: error: {{.*}}section '.nosection' not found
# ERR-NOBITS-TYPE: error: {{.*}}section '.nobits_type' can't be updated because it does not have contents
# ERR-NULL-TYPE: error: {{.*}}section '.null_type' can't be updated because it does not have contents
# ERR-LARGER: error: {{.*}}cannot fit data of size 9 into section '.in_segment' with size 8 that is part of a segment

# MISSING-EQ: error: bad format for --update-section: missing '='
# MISSING-FILE: error: bad format for --update-section: missing file name