Files
clang-p2996/lld/test/ELF/linkerscript/sections-constraint.s
Rafael Espindola d23e9267a6 Order writable executable sections before writable ones.
On SPARC, .plt is both writeable and executable. The current way
sections are sorted means that lld puts it after .data/.bss. but it
really needs to be close to .test to make sure branches into .plt
don't overflow. I'd argue that because .bss is supposed to come last
on all architectures, we should change the default sort order such
that writable and executable sections come before sections that are
just writeable. read-only executable sections should still come after
sections that are just read-only of course. This diff makes this
change.

llvm-svn: 304008
2017-05-26 17:23:25 +00:00

47 lines
1.2 KiB
ArmAsm

# REQUIRES: x86
# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
# RUN: echo "SECTIONS { \
# RUN: .writable : ONLY_IF_RW { *(.writable) } \
# RUN: .readable : ONLY_IF_RO { *(.readable) }}" > %t.script
# RUN: ld.lld -o %t1 --script %t.script %t
# RUN: llvm-objdump -section-headers %t1 | \
# RUN: FileCheck -check-prefix=BASE %s
# BASE: Sections:
# BASE-NEXT: Idx Name Size
# BASE-NEXT: 0 00000000
# BASE: .writable 00000004
# BASE: .readable 00000004
# RUN: echo "SECTIONS { \
# RUN: .foo : ONLY_IF_RO { *(.foo.*) } \
# RUN: .writable : ONLY_IF_RW { *(.writable) } \
# RUN: .readable : ONLY_IF_RO { *(.readable) }}" > %t2.script
# RUN: ld.lld -o %t2 --script %t2.script %t
# RUN: llvm-objdump -section-headers %t2 | \
# RUN: FileCheck -check-prefix=NO1 %s
# NO1: Sections:
# NO1-NEXT: Idx Name Size
# NO1-NEXT: 0 00000000
# NO1: .writable 00000004
# NO1: .foo.2 00000004
# NO1: .readable 00000004
# NO1: .foo.1 00000004
.global _start
_start:
nop
.section .writable, "aw"
writable:
.long 1
.section .readable, "a"
readable:
.long 2
.section .foo.1, "awx"
.long 0
.section .foo.2, "aw"
.long 0