# REQUIRES: x86
## Test that SHT_GROUP sections are retained in relocatable output. The content
## may be rewritten because group members may change their indices. Additionally,
## group member may be combined or discarded (e.g. /DISCARD/ or --gc-sections).
# RUN: rm -rf %t && split-file %s %t && cd %t
# RUN: llvm-mc -filetype=obj -triple=x86_64 a.s -o a.o
# RUN: ld.lld -r a.o a.o -o a.ro
# RUN: llvm-readelf -g -S a.ro | FileCheck %s
# CHECK: Name Type Address Off Size ES Flg Lk Inf Al
# CHECK: .group GROUP 0000000000000000 {{.*}} 00001c 04 [[#]] [[#]] 4
# CHECK-NEXT: .rodata.bar PROGBITS 0000000000000000 {{.*}} 000001 00 AG 0 0 1
# CHECK-NEXT: .rodata.foo PROGBITS 0000000000000000 {{.*}} 000001 00 AG 0 0 1
# CHECK-NEXT: .text.bar PROGBITS 0000000000000000 {{.*}} 000008 00 AXG 0 0 1
# CHECK-NEXT: .rela.text.bar RELA 0000000000000000 {{.*}} 000018 18 IG [[#]] [[#]] 8
# CHECK-NEXT: .text.foo PROGBITS 0000000000000000 {{.*}} 000008 00 AXG [[#]] [[#]] 1
# CHECK-NEXT: .rela.text.foo RELA 0000000000000000 {{.*}} 000018 18 IG [[#]] [[#]] 8
# CHECK-NEXT: .note.GNU-stack
# CHECK: COMDAT group section [{{.*}}] `.group' [abc] contains 6 sections:
# CHECK-NEXT: Name
# CHECK-NEXT: .rodata.bar
# CHECK-NEXT: .rodata.foo
# CHECK-NEXT: .text.bar
# CHECK-NEXT: .rela.text.bar
# CHECK-NEXT: .text.foo
# CHECK-NEXT: .rela.text.foo
## Rewrite SHT_GROUP content if some members are combined.
# RUN: echo 'SECTIONS { .rodata : {*(.rodata.*)} .text : {*(.text.*)} }' > combine.lds
# RUN: ld.lld -r -T combine.lds a.o a.o -o combine.ro
# RUN: llvm-readelf -g -S combine.ro | FileCheck %s --check-prefix=COMBINE
# COMBINE: Name Type Address Off Size ES Flg Lk Inf Al
# COMBINE: .rodata PROGBITS 0000000000000000 {{.*}} 000002 00 AG 0 0 1
# COMBINE-NEXT: .text PROGBITS 0000000000000000 {{.*}} 000010 00 AXG 0 0 4
# COMBINE-NEXT: .group GROUP 0000000000000000 {{.*}} 000014 04 [[#]] [[#]] 4
# COMBINE-NEXT: .rela.text RELA 0000000000000000 {{.*}} 000018 18 IG [[#]] [[#]] 8
# COMBINE-NEXT: .rela.text RELA 0000000000000000 {{.*}} 000018 18 IG [[#]] [[#]] 8
# COMBINE-NEXT: .note.GNU-stack
# COMBINE: COMDAT group section [{{.*}}] `.group' [abc] contains 4 sections:
# COMBINE-NEXT: Name
# COMBINE-NEXT: .rodata
# COMBINE-NEXT: .text
# COMBINE-NEXT: .rela.text
# COMBINE-NEXT: .rela.text
## If --force-group-allocation is specified, discard .group and combine .rela.* if their relocated sections are combined.
# RUN: ld.lld -r -T combine.lds a.o a.o --force-group-allocation -o combine-a.ro
# RUN: llvm-readelf -g -S combine-a.ro | FileCheck %s --check-prefix=COMBINE-A
# COMBINE-A: Name Type Address Off Size ES Flg Lk Inf Al
# COMBINE-A: .rodata PROGBITS 0000000000000000 {{.*}} 000002 00 A 0 0 1
# COMBINE-A-NEXT: .text PROGBITS 0000000000000000 {{.*}} 000010 00 AX 0 0 4
# COMBINE-A-NEXT: .rela.text RELA 0000000000000000 {{.*}} 000030 18 I [[#]] [[#]] 8
# COMBINE-A-NEXT: .note.GNU-stack
# RUN: echo 'SECTIONS { /DISCARD/ : {*(.rodata.*)} }' > discard-rodata.lds
# RUN: ld.lld -r -T discard-rodata.lds a.o a.o -o discard-rodata.ro
# RUN: llvm-readelf -g -S discard-rodata.ro | FileCheck %s --check-prefix=NO-RODATA
## Handle discarded group members.
# NO-RODATA: Name Type Address Off Size ES Flg Lk Inf Al
# NO-RODATA: .group GROUP 0000000000000000 {{.*}} 000014 04 [[#]] [[#]] 4
# NO-RODATA-NEXT: .text.bar PROGBITS 0000000000000000 {{.*}} 000008 00 AXG 0 0 1
# NO-RODATA-NEXT: .rela.text.bar RELA 0000000000000000 {{.*}} 000018 18 IG [[#]] [[#]] 8
# NO-RODATA-NEXT: .text.foo PROGBITS 0000000000000000 {{.*}} 000008 00 AXG [[#]] [[#]] 1
# NO-RODATA-NEXT: .rela.text.foo RELA 0000000000000000 {{.*}} 000018 18 IG [[#]] [[#]] 8
# NO-RODATA-NEXT: .note.GNU-stack
# NO-RODATA: COMDAT group section [{{.*}}] `.group' [abc] contains 4 sections:
# NO-RODATA-NEXT: Name
# NO-RODATA-NEXT: .text.bar
# NO-RODATA-NEXT: .rela.text.bar
# NO-RODATA-NEXT: .text.foo
# NO-RODATA-NEXT: .rela.text.foo
#--- a.s
.weak abc
abc:
.section .rodata.bar,"aG",@progbits,abc,comdat
.byte 42
.section .rodata.foo,"aG",@progbits,abc,comdat
.byte 42
.section .text.bar,"axG",@progbits,abc,comdat
.quad abc
.section .text.foo,"axG",@progbits,abc,comdat
.quad abc
Codebase Browser
llvm