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llvm-project/lld/test/ELF/pack-dyn-relocs.s

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ELF: Add support for emitting dynamic relocations in the Android relocation packing format. The Android relocation packing format is a more compact format for dynamic relocations in executables and DSOs that is based on delta encoding and SLEBs. An overview of the format can be found in the Android source code: https://android.googlesource.com/platform/bionic/+/refs/heads/master/tools/relocation_packer/src/delta_encoder.h This patch implements relocation packing using that format. This implementation uses a more intelligent algorithm for compressing relative relocations than Android's own relocation packer. As a result it can generally create smaller relocation sections than that packer. If I link Chromium for Android targeting ARM32 I get a .rel.dyn of size 174693 bytes, as compared to 371832 bytes with gold and the Android packer. Differential Revision: https://reviews.llvm.org/D39152 llvm-svn: 316775
2017-10-28 01:49:40 +08:00
// REQUIRES: arm, aarch64
// RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %p/Inputs/arm-shared.s -o %t.a32.so.o
// RUN: ld.lld -shared %t.a32.so.o -o %t.a32.so
// RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %s -o %t.a32
// RUN: ld.lld -pie --pack-dyn-relocs=none %t.a32 %t.a32.so -o %t2.a32
// RUN: llvm-readobj -relocations %t2.a32 | FileCheck --check-prefix=UNPACKED32 %s
Accept both `--foo bar` and `--foo=bar` styles options. GNU linkers by convention supports both `--foo bar` and `--foo=bar` styles for all long options that take arguments. Differential Revision: https://reviews.llvm.org/D43972 llvm-svn: 326506
2018-03-02 07:06:10 +08:00
// RUN: ld.lld -pie --pack-dyn-relocs android %t.a32 %t.a32.so -o %t3.a32
ELF: Add support for emitting dynamic relocations in the Android relocation packing format. The Android relocation packing format is a more compact format for dynamic relocations in executables and DSOs that is based on delta encoding and SLEBs. An overview of the format can be found in the Android source code: https://android.googlesource.com/platform/bionic/+/refs/heads/master/tools/relocation_packer/src/delta_encoder.h This patch implements relocation packing using that format. This implementation uses a more intelligent algorithm for compressing relative relocations than Android's own relocation packer. As a result it can generally create smaller relocation sections than that packer. If I link Chromium for Android targeting ARM32 I get a .rel.dyn of size 174693 bytes, as compared to 371832 bytes with gold and the Android packer. Differential Revision: https://reviews.llvm.org/D39152 llvm-svn: 316775
2017-10-28 01:49:40 +08:00
// RUN: llvm-readobj -s -dynamic-table %t3.a32 | FileCheck --check-prefix=PACKED32-HEADERS %s
// RUN: llvm-readobj -relocations %t3.a32 | FileCheck --check-prefix=PACKED32 %s
// Unpacked should have the relative relocations in their natural order.
// UNPACKED32: 0x1000 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1004 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1008 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x100C R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1010 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1014 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1018 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x101C R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1024 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1028 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x102C R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1030 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1034 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1038 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x103C R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1044 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1048 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x104C R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1050 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1054 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1058 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x105C R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1060 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1064 R_ARM_RELATIVE - 0x0
// UNPACKED32-NEXT: 0x1020 R_ARM_ABS32 bar2 0x0
// UNPACKED32-NEXT: 0x1040 R_ARM_ABS32 zed2 0x0
// PACKED32-HEADERS: Index: 1
// PACKED32-HEADERS-NEXT: Name: .dynsym
// PACKED32-HEADERS: Name: .rel.dyn
// PACKED32-HEADERS-NEXT: Type: SHT_ANDROID_REL
// PACKED32-HEADERS-NEXT: Flags [ (0x2)
// PACKED32-HEADERS-NEXT: SHF_ALLOC (0x2)
// PACKED32-HEADERS-NEXT: ]
// PACKED32-HEADERS-NEXT: Address: [[ADDR:.*]]
// PACKED32-HEADERS-NEXT: Offset: [[ADDR]]
// PACKED32-HEADERS-NEXT: Size: [[SIZE:.*]]
// PACKED32-HEADERS-NEXT: Link: 1
// PACKED32-HEADERS-NEXT: Info: 0
// PACKED32-HEADERS-NEXT: AddressAlignment: 4
// PACKED32-HEADERS-NEXT: EntrySize: 1
// PACKED32-HEADERS: 0x6000000F ANDROID_REL [[ADDR]]
// PACKED32-HEADERS: 0x60000010 ANDROID_RELSZ [[SIZE]]
// Packed should have the larger groups of relative relocations first,
// i.e. the 8 and 9 followed by the 7.
// PACKED32: 0x1000 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1004 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1008 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x100C R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1010 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1014 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1018 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x101C R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1044 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1048 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x104C R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1050 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1054 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1058 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x105C R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1060 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1064 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1024 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1028 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x102C R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1030 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1034 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1038 R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x103C R_ARM_RELATIVE - 0x0
// PACKED32-NEXT: 0x1020 R_ARM_ABS32 bar2 0x0
// PACKED32-NEXT: 0x1040 R_ARM_ABS32 zed2 0x0
// RUN: llvm-mc -filetype=obj -triple=aarch64-unknown-linux %p/Inputs/shared2.s -o %t.a64.so.o
// RUN: ld.lld -shared %t.a64.so.o -o %t.a64.so
// RUN: llvm-mc -filetype=obj -triple=aarch64-unknown-linux %s -o %t.a64
// RUN: ld.lld -pie --pack-dyn-relocs=none %t.a64 %t.a64.so -o %t2.a64
// RUN: llvm-readobj -relocations %t2.a64 | FileCheck --check-prefix=UNPACKED64 %s
// RUN: ld.lld -pie --pack-dyn-relocs=android %t.a64 %t.a64.so -o %t3.a64
// RUN: llvm-readobj -s -dynamic-table %t3.a64 | FileCheck --check-prefix=PACKED64-HEADERS %s
// RUN: llvm-readobj -relocations %t3.a64 | FileCheck --check-prefix=PACKED64 %s
// UNPACKED64: 0x10000 R_AARCH64_RELATIVE - 0x1
// UNPACKED64-NEXT: 0x10008 R_AARCH64_RELATIVE - 0x2
// UNPACKED64-NEXT: 0x10010 R_AARCH64_RELATIVE - 0x3
// UNPACKED64-NEXT: 0x10018 R_AARCH64_RELATIVE - 0x4
// UNPACKED64-NEXT: 0x10020 R_AARCH64_RELATIVE - 0x5
// UNPACKED64-NEXT: 0x10028 R_AARCH64_RELATIVE - 0x6
// UNPACKED64-NEXT: 0x10030 R_AARCH64_RELATIVE - 0x7
// UNPACKED64-NEXT: 0x10038 R_AARCH64_RELATIVE - 0x8
// UNPACKED64-NEXT: 0x10048 R_AARCH64_RELATIVE - 0x1
// UNPACKED64-NEXT: 0x10050 R_AARCH64_RELATIVE - 0x2
// UNPACKED64-NEXT: 0x10058 R_AARCH64_RELATIVE - 0x3
// UNPACKED64-NEXT: 0x10060 R_AARCH64_RELATIVE - 0x4
// UNPACKED64-NEXT: 0x10068 R_AARCH64_RELATIVE - 0x5
// UNPACKED64-NEXT: 0x10070 R_AARCH64_RELATIVE - 0x6
// UNPACKED64-NEXT: 0x10078 R_AARCH64_RELATIVE - 0x7
// UNPACKED64-NEXT: 0x10088 R_AARCH64_RELATIVE - 0x1
// UNPACKED64-NEXT: 0x10090 R_AARCH64_RELATIVE - 0x2
// UNPACKED64-NEXT: 0x10098 R_AARCH64_RELATIVE - 0x3
// UNPACKED64-NEXT: 0x100A0 R_AARCH64_RELATIVE - 0x4
// UNPACKED64-NEXT: 0x100A8 R_AARCH64_RELATIVE - 0x5
// UNPACKED64-NEXT: 0x100B0 R_AARCH64_RELATIVE - 0x6
// UNPACKED64-NEXT: 0x100B8 R_AARCH64_RELATIVE - 0x7
// UNPACKED64-NEXT: 0x100C0 R_AARCH64_RELATIVE - 0x8
// UNPACKED64-NEXT: 0x100C8 R_AARCH64_RELATIVE - 0x9
// UNPACKED64-NEXT: 0x10040 R_AARCH64_ABS64 bar2 0x1
// UNPACKED64-NEXT: 0x10080 R_AARCH64_ABS64 zed2 0x0
// PACKED64: 0x10000 R_AARCH64_RELATIVE - 0x1
// PACKED64-NEXT: 0x10008 R_AARCH64_RELATIVE - 0x2
// PACKED64-NEXT: 0x10010 R_AARCH64_RELATIVE - 0x3
// PACKED64-NEXT: 0x10018 R_AARCH64_RELATIVE - 0x4
// PACKED64-NEXT: 0x10020 R_AARCH64_RELATIVE - 0x5
// PACKED64-NEXT: 0x10028 R_AARCH64_RELATIVE - 0x6
// PACKED64-NEXT: 0x10030 R_AARCH64_RELATIVE - 0x7
// PACKED64-NEXT: 0x10038 R_AARCH64_RELATIVE - 0x8
// PACKED64-NEXT: 0x10088 R_AARCH64_RELATIVE - 0x1
// PACKED64-NEXT: 0x10090 R_AARCH64_RELATIVE - 0x2
// PACKED64-NEXT: 0x10098 R_AARCH64_RELATIVE - 0x3
// PACKED64-NEXT: 0x100A0 R_AARCH64_RELATIVE - 0x4
// PACKED64-NEXT: 0x100A8 R_AARCH64_RELATIVE - 0x5
// PACKED64-NEXT: 0x100B0 R_AARCH64_RELATIVE - 0x6
// PACKED64-NEXT: 0x100B8 R_AARCH64_RELATIVE - 0x7
// PACKED64-NEXT: 0x100C0 R_AARCH64_RELATIVE - 0x8
// PACKED64-NEXT: 0x100C8 R_AARCH64_RELATIVE - 0x9
// PACKED64-NEXT: 0x10048 R_AARCH64_RELATIVE - 0x1
// PACKED64-NEXT: 0x10050 R_AARCH64_RELATIVE - 0x2
// PACKED64-NEXT: 0x10058 R_AARCH64_RELATIVE - 0x3
// PACKED64-NEXT: 0x10060 R_AARCH64_RELATIVE - 0x4
// PACKED64-NEXT: 0x10068 R_AARCH64_RELATIVE - 0x5
// PACKED64-NEXT: 0x10070 R_AARCH64_RELATIVE - 0x6
// PACKED64-NEXT: 0x10078 R_AARCH64_RELATIVE - 0x7
// PACKED64-NEXT: 0x10040 R_AARCH64_ABS64 bar2 0x1
// PACKED64-NEXT: 0x10080 R_AARCH64_ABS64 zed2 0x0
// PACKED64-HEADERS: Index: 1
// PACKED64-HEADERS-NEXT: Name: .dynsym
// PACKED64-HEADERS: Name: .rela.dyn
// PACKED64-HEADERS-NEXT: Type: SHT_ANDROID_RELA
// PACKED64-HEADERS-NEXT: Flags [ (0x2)
// PACKED64-HEADERS-NEXT: SHF_ALLOC (0x2)
// PACKED64-HEADERS-NEXT: ]
// PACKED64-HEADERS-NEXT: Address: [[ADDR:.*]]
// PACKED64-HEADERS-NEXT: Offset: [[ADDR]]
// PACKED64-HEADERS-NEXT: Size: [[SIZE:.*]]
// PACKED64-HEADERS-NEXT: Link: 1
// PACKED64-HEADERS-NEXT: Info: 0
// PACKED64-HEADERS-NEXT: AddressAlignment: 8
// PACKED64-HEADERS-NEXT: EntrySize: 1
// PACKED64-HEADERS: 0x0000000060000011 ANDROID_RELA [[ADDR]]
// PACKED64-HEADERS: 0x0000000060000012 ANDROID_RELASZ [[SIZE]]
.data
.dc.a __ehdr_start + 1
.dc.a __ehdr_start + 2
.dc.a __ehdr_start + 3
.dc.a __ehdr_start + 4
.dc.a __ehdr_start + 5
.dc.a __ehdr_start + 6
.dc.a __ehdr_start + 7
.dc.a __ehdr_start + 8
.dc.a bar2 + 1
.dc.a __ehdr_start + 1
.dc.a __ehdr_start + 2
.dc.a __ehdr_start + 3
.dc.a __ehdr_start + 4
.dc.a __ehdr_start + 5
.dc.a __ehdr_start + 6
.dc.a __ehdr_start + 7
.dc.a zed2
.dc.a __ehdr_start + 1
.dc.a __ehdr_start + 2
.dc.a __ehdr_start + 3
.dc.a __ehdr_start + 4
.dc.a __ehdr_start + 5
.dc.a __ehdr_start + 6
.dc.a __ehdr_start + 7
.dc.a __ehdr_start + 8
.dc.a __ehdr_start + 9