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[test] Test absolute/relative relocations referencing undefined non-weak symbol

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Fangrui Song 2025-03-28 19:28:31 -07:00
parent 539ef5eee2
commit f8ffbaebed
1 changed files with 28 additions and 7 deletions
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35
lld/test/ELF/weak-undef-rw.s
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@ -1,11 +1,14 @@
# REQUIRES: x86 # REQUIRES: x86
# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o # RUN: rm -rf %t && split-file %s %t && cd %t
# RUN: ld.lld %t.o -o %t --export-dynamic # RUN: llvm-mc -filetype=obj -triple=x86_64 a.s -o a.o
# RUN: llvm-readelf -r --hex-dump=.data %t | FileCheck %s --check-prefix=STATIC # RUN: llvm-mc -filetype=obj -triple=x86_64 b.s -o b.o
# RUN: ld.lld %t.o -o %t.pie -pie # RUN: llvm-mc -filetype=obj -triple=x86_64 c.s -o c.o
# RUN: llvm-readelf -r --hex-dump=.data %t.pie | FileCheck %s --check-prefix=STATIC # RUN: ld.lld a.o -o nopie --export-dynamic
# RUN: ld.lld %t.o -o %t.so -shared # RUN: llvm-readelf -r --hex-dump=.data nopie | FileCheck %s --check-prefix=STATIC
# RUN: llvm-readobj -r %t.so | FileCheck %s --check-prefix=PIC # RUN: ld.lld a.o -o out.pie -pie
# RUN: llvm-readelf -r --hex-dump=.data out.pie | FileCheck %s --check-prefix=STATIC
# RUN: ld.lld a.o -o out.so -shared
# RUN: llvm-readobj -r out.so | FileCheck %s --check-prefix=PIC
## gABI leaves the behavior of weak undefined references implementation defined. ## gABI leaves the behavior of weak undefined references implementation defined.
## We choose to resolve them statically for static linking and produce dynamic relocations ## We choose to resolve them statically for static linking and produce dynamic relocations
@ -23,8 +26,26 @@
# PIC-NEXT: R_X86_64_64 foobar 0x0 # PIC-NEXT: R_X86_64_64 foobar 0x0
# PIC-NEXT: } # PIC-NEXT: }
# RUN: ld.lld a.o b.o -o out1 -z undefs
# RUN: llvm-readelf -r -x .data out1 | FileCheck %s --check-prefix=STATIC1
# RUN: ld.lld a.o b.o -o out1.pie -pie -z undefs
# RUN: llvm-readelf -r -x .data out1.pie | FileCheck %s --check-prefix=STATIC2
# STATIC1: no relocations
# STATIC2: R_X86_64_RELATIVE
# RUN: ld.lld a.o b.o c.o -pie -z undefs 2>&1 | count 0
#--- a.s
.global _start .global _start
_start: _start:
.data .data
.weak foobar .weak foobar
.quad foobar .quad foobar
#--- b.s
.data
.quad undef
#--- c.s
call undef