You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
281 lines
10 KiB
281 lines
10 KiB
4 months ago
|
# RUN: yaml2obj --docnum=1 %s -o %t1
|
||
|
|
# RUN: llvm-objcopy --only-keep-debug %t1 %t1.dbg
|
||
|
|
# RUN: llvm-readelf -S -l -x .note1 -x .note2 -x .debug_abbrev -x .debug_frame -x .debug_info %t1.dbg | FileCheck %s
|
||
|
|
|
||
|
|
## Check that SHT_NOTE and .debug* are kept, but others are changed to SHT_NOBITS.
|
||
|
|
## SHT_NOBITS sections do not occupy space in the output.
|
||
|
|
|
||
|
|
# CHECK: [Nr] Name Type Address Off Size ES Flg Lk Inf Al
|
||
|
|
# CHECK: [ 1] .note1 NOTE 0000000000000400 000400 000001 00 A 0 0 1024
|
||
|
|
# CHECK-NEXT: [ 2] .note2 NOTE 0000000000000401 000401 000001 00 A 0 0 0
|
||
|
|
# CHECK-NEXT: [ 3] .text NOBITS 0000000000000402 000402 000001 00 AX 0 0 0
|
||
|
|
# CHECK-NEXT: [ 4] .tdata NOBITS 0000000000001480 000480 000007 00 WAT 0 0 128
|
||
|
|
# CHECK-NEXT: [ 5] .tbss NOBITS 0000000000001487 000480 000005 00 WAT 0 0 0
|
||
|
|
# CHECK-NEXT: [ 6] .bss NOBITS 00000000000014a0 000480 00003f 00 WA 0 0 32
|
||
|
|
## objcopy sets sh_offset to 0x402. We don't do this to keep sh_offset non-decreasing.
|
||
|
|
# CHECK-NEXT: [ 7] .debug_abbrev PROGBITS 0000000000000000 000480 000001 00 0 0 0
|
||
|
|
# CHECK-NEXT: [ 8] .debug_frame PROGBITS 0000000000000000 000488 000001 00 0 0 8
|
||
|
|
# CHECK-NEXT: [ 9] .debug_info PROGBITS 0000000000000000 000489 000001 00 0 0 0
|
||
|
|
# CHECK-NEXT: [10] .strtab STRTAB 0000000000000000 00048a 000001 00 0 0 1
|
||
|
|
# CHECK-NEXT: [11] .shstrtab STRTAB 0000000000000000 00048b 000060 00 0 0 1
|
||
|
|
|
||
|
|
# CHECK: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
|
||
|
|
# CHECK-NEXT: LOAD 0x000000 0x0000000000000000 0x0000000000000000 0x000402 0x000403 R E 0x1000
|
||
|
|
# CHECK-NEXT: LOAD 0x000480 0x0000000000001480 0x0000000000001480 0x000000 0x00005f RW 0x1000
|
||
|
|
# CHECK-NEXT: TLS 0x000480 0x0000000000001480 0x0000000000001480 0x000000 0x00000c RW 0x80
|
||
|
|
# CHECK-NEXT: NOTE 0x000400 0x0000000000000400 0x0000000000000400 0x000002 0x000002 0x400
|
||
|
|
|
||
|
|
## Contents of SHT_NOTE and .debug* are kept.
|
||
|
|
|
||
|
|
# CHECK: Hex dump of section '.note1':
|
||
|
|
# CHECK-NEXT: 0x00000400 01
|
||
|
|
# CHECK: Hex dump of section '.note2':
|
||
|
|
# CHECK-NEXT: 0x00000401 02
|
||
|
|
# CHECK: Hex dump of section '.debug_abbrev':
|
||
|
|
# CHECK-NEXT: 0x00000000 03
|
||
|
|
# CHECK: Hex dump of section '.debug_frame':
|
||
|
|
# CHECK-NEXT: 0x00000000 04
|
||
|
|
# CHECK: Hex dump of section '.debug_info':
|
||
|
|
# CHECK-NEXT: 0x00000000 05
|
||
|
|
|
||
|
|
--- !ELF
|
||
|
|
FileHeader:
|
||
|
|
Class: ELFCLASS64
|
||
|
|
Data: ELFDATA2LSB
|
||
|
|
Type: ET_DYN
|
||
|
|
Machine: EM_X86_64
|
||
|
|
Sections:
|
||
|
|
- Name: .note1
|
||
|
|
Type: SHT_NOTE
|
||
|
|
Flags: [ SHF_ALLOC ]
|
||
|
|
Address: 0x400
|
||
|
|
AddressAlign: 0x400
|
||
|
|
Content: 01
|
||
|
|
- Name: .note2
|
||
|
|
Type: SHT_NOTE
|
||
|
|
Flags: [ SHF_ALLOC ]
|
||
|
|
Address: 0x401
|
||
|
|
Content: 02
|
||
|
|
- Name: .text
|
||
|
|
Type: SHT_PROGBITS
|
||
|
|
Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
|
||
|
|
Address: 0x402
|
||
|
|
Content: c3
|
||
|
|
- Name: .tdata
|
||
|
|
Type: SHT_PROGBITS
|
||
|
|
Flags: [ SHF_ALLOC, SHF_WRITE, SHF_TLS ]
|
||
|
|
Address: 0x1480 # Ensure Address=0x1000+Offset
|
||
|
|
AddressAlign: 0x80
|
||
|
|
# An arbitrary non-zero Size tests that .tdata does not occupy space
|
||
|
|
# and we can rewrite p_filesz of PT_TLS.
|
||
|
|
Size: 7
|
||
|
|
- Name: .tbss
|
||
|
|
Type: SHT_NOBITS
|
||
|
|
Flags: [ SHF_ALLOC, SHF_WRITE, SHF_TLS ]
|
||
|
|
Address: 0x1487 # Ensure Address=0x1000+Offset
|
||
|
|
Size: 5
|
||
|
|
- Name: .bss
|
||
|
|
Type: SHT_NOBITS
|
||
|
|
Flags: [ SHF_ALLOC, SHF_WRITE ]
|
||
|
|
Address: 0x14a0 # Ensure Address=0x1000+Offset
|
||
|
|
AddressAlign: 0x20
|
||
|
|
# An arbitrary non-zero Size tests that .bss does not occupy space.
|
||
|
|
Size: 63
|
||
|
|
- Name: .debug_abbrev
|
||
|
|
Type: SHT_PROGBITS
|
||
|
|
Content: 03
|
||
|
|
- Name: .debug_frame
|
||
|
|
Type: SHT_PROGBITS
|
||
|
|
# AddressAlign tests the file offset assignment leaves a gap.
|
||
|
|
AddressAlign: 0x8
|
||
|
|
Content: 04
|
||
|
|
- Name: .debug_info
|
||
|
|
Type: SHT_PROGBITS
|
||
|
|
Content: 05
|
||
|
|
ProgramHeaders:
|
||
|
|
- Type: PT_LOAD
|
||
|
|
Flags: [ PF_R, PF_X ]
|
||
|
|
Offset: 0
|
||
|
|
Align: 0x1000
|
||
|
|
FirstSec: .note1
|
||
|
|
LastSec: .text
|
||
|
|
- Type: PT_LOAD
|
||
|
|
Flags: [ PF_R, PF_W ]
|
||
|
|
VAddr: 0x1480 # Ensure Offset=VAddr (mod Align) if Offset changes
|
||
|
|
Align: 0x1000
|
||
|
|
FirstSec: .tdata
|
||
|
|
LastSec: .bss
|
||
|
|
- Type: PT_TLS
|
||
|
|
Flags: [ PF_R, PF_W ]
|
||
|
|
VAddr: 0x1480 # Ensure Offset=VAddr (mod Align) if Offset changes
|
||
|
|
FirstSec: .tdata
|
||
|
|
LastSec: .tbss
|
||
|
|
- Type: PT_NOTE
|
||
|
|
VAddr: 0x400
|
||
|
|
FirstSec: .note1
|
||
|
|
LastSec: .note2
|
||
|
|
...
|
||
|
|
|
||
|
|
# RUN: yaml2obj --docnum=2 %s -o %t2
|
||
|
|
# RUN: llvm-objcopy --only-keep-debug %t2 %t2.dbg
|
||
|
|
# RUN: llvm-readelf -S -l %t2.dbg | FileCheck --check-prefix=CHECK2 %s
|
||
|
|
|
||
|
|
## Only the tail of a segment can be trimmed. .text still occupies space because
|
||
|
|
## it is followed by .note which is not SHT_NOBITS.
|
||
|
|
# CHECK2: [Nr] Name Type Address Off Size ES Flg Lk Inf Al
|
||
|
|
# CHECK2: [ 1] .text NOBITS 0000000000000200 000200 000001 00 AX 0 0 512
|
||
|
|
# CHECK2-NEXT: [ 2] .note NOTE 0000000000000201 000201 000001 00 A 0 0 0
|
||
|
|
# CHECK2-NEXT: [ 3] .debug_info PROGBITS 0000000000000000 000220 000001 00 0 0 32
|
||
|
|
# CHECK2-NEXT: [ 4] .strtab STRTAB 0000000000000000 000221 000001 00 0 0 1
|
||
|
|
# CHECK2-NEXT: [ 5] .shstrtab STRTAB 0000000000000000 000222 00002b 00 0 0 1
|
||
|
|
|
||
|
|
## Check that p_offset or p_filesz of empty segments or PT_PHDR are not modified.
|
||
|
|
# CHECK2: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
|
||
|
|
# CHECK2-NEXT: PHDR 0x000040 0x0000000000000040 0x0000000000000040 0x0000a8 0x0000a8 R 0x8
|
||
|
|
# CHECK2-NEXT: LOAD 0x000000 0x0000000000000000 0x0000000000000000 0x000202 0x000202 R E 0x1000
|
||
|
|
# CHECK2-NEXT: LOAD 0x000202 0x0000000000000202 0x0000000000000202 0x00000e 0x00000e RW 0x1
|
||
|
|
|
||
|
|
--- !ELF
|
||
|
|
FileHeader:
|
||
|
|
Class: ELFCLASS64
|
||
|
|
Data: ELFDATA2LSB
|
||
|
|
Type: ET_DYN
|
||
|
|
Machine: EM_X86_64
|
||
|
|
Sections:
|
||
|
|
- Name: .text
|
||
|
|
Type: SHT_PROGBITS
|
||
|
|
Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
|
||
|
|
Address: 0x200
|
||
|
|
AddressAlign: 0x200
|
||
|
|
Content: c3
|
||
|
|
- Name: .note
|
||
|
|
Type: SHT_NOTE
|
||
|
|
Flags: [ SHF_ALLOC ]
|
||
|
|
Address: 0x201
|
||
|
|
Content: 01
|
||
|
|
- Name: .debug_info
|
||
|
|
Type: SHT_PROGBITS
|
||
|
|
AddressAlign: 0x20
|
||
|
|
Content: 02
|
||
|
|
ProgramHeaders:
|
||
|
|
- Type: PT_PHDR
|
||
|
|
Flags: [ PF_R ]
|
||
|
|
Offset: 0x40
|
||
|
|
VAddr: 0x40
|
||
|
|
# 3 * sizeof(Elf64_Phdr) = 0xa8
|
||
|
|
FileSize: 0xa8
|
||
|
|
MemSize: 0xa8
|
||
|
|
Align: 8
|
||
|
|
- Type: PT_LOAD
|
||
|
|
Flags: [ PF_R, PF_X ]
|
||
|
|
Offset: 0
|
||
|
|
Align: 4096
|
||
|
|
FirstSec: .text
|
||
|
|
LastSec: .note
|
||
|
|
- Type: PT_LOAD
|
||
|
|
Flags: [ PF_R, PF_W ]
|
||
|
|
Offset: 0x202
|
||
|
|
VAddr: 0x202
|
||
|
|
FileSize: 14
|
||
|
|
MemSize: 14
|
||
|
|
...
|
||
|
|
|
||
|
|
## If .symtab or .strtab has the SHF_ALLOC flag, it will be changed to SHT_NOBITS.
|
||
|
|
# RUN: yaml2obj --docnum=3 %s -o %t3
|
||
|
|
# RUN: llvm-objcopy --only-keep-debug %t3 %t3.dbg
|
||
|
|
# RUN: llvm-readelf -S -l %t3.dbg | FileCheck --check-prefix=CHECK3 %s
|
||
|
|
|
||
|
|
# CHECK3: [Nr] Name Type Address Off Size ES Flg Lk Inf Al
|
||
|
|
# CHECK3: [ 1] .dynsym NOBITS 0000000000000000 000040 000018 18 A 2 1 1024
|
||
|
|
# CHECK3-NEXT: [ 2] .dynstr NOBITS 0000000000000018 000040 000001 00 A 0 0 0
|
||
|
|
# CHECK3-NEXT: [ 3] .symtab NOBITS 0000000000000019 000040 000018 18 A 4 1 0
|
||
|
|
# CHECK3-NEXT: [ 4] .strtab NOBITS 0000000000000031 000040 000001 00 A 0 0 0
|
||
|
|
# CHECK3-NEXT: [ 5] .shstrtab STRTAB 0000000000000000 000040 00002b 00 0 0 1
|
||
|
|
|
||
|
|
--- !ELF
|
||
|
|
FileHeader:
|
||
|
|
Class: ELFCLASS64
|
||
|
|
Data: ELFDATA2LSB
|
||
|
|
Type: ET_DYN
|
||
|
|
Machine: EM_X86_64
|
||
|
|
Sections:
|
||
|
|
- Name: .dynsym
|
||
|
|
Type: SHT_DYNSYM
|
||
|
|
Flags: [ SHF_ALLOC ]
|
||
|
|
Link: .dynstr
|
||
|
|
AddressAlign: 0x400
|
||
|
|
- Name: .dynstr
|
||
|
|
Type: SHT_STRTAB
|
||
|
|
Flags: [ SHF_ALLOC ]
|
||
|
|
- Name: .symtab
|
||
|
|
Type: SHT_STRTAB
|
||
|
|
Flags: [ SHF_ALLOC ]
|
||
|
|
Link: .strtab
|
||
|
|
- Name: .strtab
|
||
|
|
Type: SHT_STRTAB
|
||
|
|
Flags: [ SHF_ALLOC ]
|
||
|
|
DynamicSymbols: []
|
||
|
|
Symbols: []
|
||
|
|
|
||
|
|
## PT_TLS and .tdata are empty. Test that we set its p_offset to the parent
|
||
|
|
## segment's p_offset. If we don't rewrite the p_offset of PT_TLS and the deleted
|
||
|
|
## bytes are large, p_offset can be larger than the file size, and trigger
|
||
|
|
## validation errors with subsequent tools.
|
||
|
|
# RUN: yaml2obj --docnum=4 %s -o %t4
|
||
|
|
# RUN: llvm-objcopy --only-keep-debug %t4 %t4.dbg
|
||
|
|
# RUN: llvm-readelf -S -l %t4.dbg | FileCheck --check-prefix=CHECK4 %s
|
||
|
|
|
||
|
|
# CHECK4: [Nr] Name Type Address Off Size ES Flg Lk Inf Al
|
||
|
|
# CHECK4: [ 1] .text NOBITS 0000000000000200 000200 000001 00 AX 0 0 0
|
||
|
|
# CHECK4-NEXT: [ 2] .tdata NOBITS 0000000000001240 000240 000000 00 WAT 0 0 64
|
||
|
|
# CHECK4-NEXT: [ 3] .got NOBITS 0000000000001240 000240 000008 00 WA 0 0 0
|
||
|
|
|
||
|
|
# CHECK4: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
|
||
|
|
# CHECK4-NEXT: LOAD 0x000200 0x0000000000000200 0x0000000000000200 0x000000 0x000001 R E 0x1000
|
||
|
|
# CHECK4-NEXT: LOAD 0x000240 0x0000000000001240 0x0000000000001240 0x000000 0x000008 RW 0x1000
|
||
|
|
# CHECK4-NEXT: TLS 0x000240 0x0000000000001240 0x0000000000001240 0x000000 0x000000 R 0x40
|
||
|
|
|
||
|
|
--- !ELF
|
||
|
|
FileHeader:
|
||
|
|
Class: ELFCLASS64
|
||
|
|
Data: ELFDATA2LSB
|
||
|
|
Type: ET_DYN
|
||
|
|
Machine: EM_X86_64
|
||
|
|
Sections:
|
||
|
|
- Name: .text
|
||
|
|
Type: SHT_PROGBITS
|
||
|
|
Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
|
||
|
|
Address: 0x200
|
||
|
|
Size: 1
|
||
|
|
- Name: .tdata
|
||
|
|
Type: SHT_PROGBITS
|
||
|
|
Flags: [ SHF_ALLOC, SHF_WRITE, SHF_TLS ]
|
||
|
|
Address: 0x1240 # Ensure Address=0x1000+Offset
|
||
|
|
AddressAlign: 0x40
|
||
|
|
- Name: .got
|
||
|
|
Type: SHT_PROGBITS
|
||
|
|
Flags: [ SHF_ALLOC, SHF_WRITE ]
|
||
|
|
Size: 8
|
||
|
|
ProgramHeaders:
|
||
|
|
- Type: PT_LOAD
|
||
|
|
Flags: [ PF_R, PF_X ]
|
||
|
|
VAddr: 0x200
|
||
|
|
Align: 0x1000
|
||
|
|
FirstSec: .text
|
||
|
|
LastSec: .text
|
||
|
|
## Add .got so that the PT_LOAD does not have zero p_memsz. We don't add
|
||
|
|
## sections to zero-sized segments so zero-sized segments may have strange
|
||
|
|
## offsets. In practice, the Linux kernel errors when mmapping a p_memsz
|
||
|
|
## PT_LOAD,so for practical so this assumption can generally be made.
|
||
|
|
- Type: PT_LOAD
|
||
|
|
Flags: [ PF_R, PF_W ]
|
||
|
|
VAddr: 0x1240
|
||
|
|
Align: 0x1000
|
||
|
|
FirstSec: .tdata
|
||
|
|
LastSec: .got
|
||
|
|
- Type: PT_TLS
|
||
|
|
Flags: [ PF_R ]
|
||
|
|
VAddr: 0x1240
|
||
|
|
FirstSec: .tdata
|
||
|
|
LastSec: .tdata
|