forked from OSchip/llvm-project
40 lines
1.2 KiB
ArmAsm
40 lines
1.2 KiB
ArmAsm
|
# REQUIRES: x86
|
||
|
|
## SHF_GNU_RETAIN is a generic feature defined in the OS specific range. The
|
||
|
|
## flag marks a section as a GC root.
|
||
|
|
|
||
|
|
# RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t.o
|
||
|
|
# RUN: ld.lld --gc-sections --print-gc-sections %t.o -o %t | count 0
|
||
|
|
# RUN: llvm-readobj -hS %t | FileCheck %s
|
||
|
|
# RUN: ld.lld -r -e _start --gc-sections --print-gc-sections %t.o -o %t.ro | count 0
|
||
|
|
# RUN: llvm-readobj -hS %t.ro | FileCheck %s
|
||
|
|
|
||
|
|
# CHECK: Name: .retain
|
||
|
|
# CHECK-NEXT: Type: SHT_PROGBITS
|
||
|
|
# CHECK-NEXT: Flags [
|
||
|
|
# CHECK-NEXT: SHF_ALLOC
|
||
|
|
# CHECK-NEXT: SHF_GNU_RETAIN
|
||
|
|
# CHECK-NEXT: ]
|
||
|
|
|
||
|
|
# RUN: llvm-mc -filetype=obj -triple=x86_64 --defsym NONALLOC=1 %s -o %t1.o
|
||
|
|
# RUN: not ld.lld --gc-sections %t1.o -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR
|
||
|
|
|
||
|
|
# ERR: error: {{.*}}.o:(.nonalloc): sh_link points to discarded section {{.*}}.o:(.discard)
|
||
|
|
|
||
|
|
.global _start
|
||
|
|
_start:
|
||
|
|
|
||
|
|
.section .retain,"aR",@progbits
|
||
|
|
.quad .foo
|
||
|
|
|
||
|
|
.section .foo,"a",@progbits
|
||
|
|
.quad 0
|
||
|
|
|
||
|
|
.ifdef NONALLOC
|
||
|
|
.section .discard,"a",@progbits
|
||
|
|
|
||
|
|
## With SHF_GNU_RETAIN, .nonalloc is retained while its linked-to section
|
||
|
|
## .discard is discarded, so there will be an error.
|
||
|
|
.section .nonalloc,"oR",@progbits,.discard
|
||
|
|
.quad .text
|
||
|
|
.endif
|