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llvm-project/lld/test/ELF/eh-frame-hdr-icf.s

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ELF: Set FDE count in .eh_frame_hdr correctly. It is possible to have FDEs with duplicate PCs if ICF was able to merge functions with FDEs, or if the input files for some reason contained duplicate FDEs. We previously weren't handling this correctly when producing the contents of the .eh_frame_hdr section; we were dropping entries and leaving null entries at the end of the section, which confused consumers of unwind data, such as the backtrace() function. Fix the bug by setting the FDE count to the number of FDEs actually emitted into .eh_frame_hdr, rather than the number of FDEs in .eh_frame. Differential Revision: http://reviews.llvm.org/D18911 llvm-svn: 265957
2016-04-12 00:40:08 +08:00
# REQUIRES: x86
# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
# RUN: ld.lld %t -o %t2 --icf=all --eh-frame-hdr
# RUN: llvm-objdump -s %t2 | FileCheck %s
# CHECK: Contents of section .eh_frame_hdr:
[ELF] - Add support of proccessing of the rest allocatable synthetic sections from linkerscript. This change continues what was started by D27040 Now all allocatable synthetics should be available from script side. Differential revision: https://reviews.llvm.org/D27131 llvm-svn: 288150
2016-11-30 00:05:27 +08:00
# CHECK-NEXT: 200158 011b033b 1c000000 01000000 a80e0000
lld: Default image base address to 0x200000 on x86-64 Align to the large page size (known as a superpage or huge page). FreeBSD automatically promotes large, superpage-aligned allocations. Differential Revision: https://reviews.llvm.org/D27042 llvm-svn: 287782
2016-11-24 01:44:02 +08:00
# ^ FDE count
[ELF] - Add support of proccessing of the rest allocatable synthetic sections from linkerscript. This change continues what was started by D27040 Now all allocatable synthetics should be available from script side. Differential revision: https://reviews.llvm.org/D27131 llvm-svn: 288150
2016-11-30 00:05:27 +08:00
# CHECK-NEXT: 200168 38000000 00000000 00000000
lld: Default image base address to 0x200000 on x86-64 Align to the large page size (known as a superpage or huge page). FreeBSD automatically promotes large, superpage-aligned allocations. Differential Revision: https://reviews.llvm.org/D27042 llvm-svn: 287782
2016-11-24 01:44:02 +08:00
# ^ FDE for f2
ELF: Set FDE count in .eh_frame_hdr correctly. It is possible to have FDEs with duplicate PCs if ICF was able to merge functions with FDEs, or if the input files for some reason contained duplicate FDEs. We previously weren't handling this correctly when producing the contents of the .eh_frame_hdr section; we were dropping entries and leaving null entries at the end of the section, which confused consumers of unwind data, such as the backtrace() function. Fix the bug by setting the FDE count to the number of FDEs actually emitted into .eh_frame_hdr, rather than the number of FDEs in .eh_frame. Differential Revision: http://reviews.llvm.org/D18911 llvm-svn: 265957
2016-04-12 00:40:08 +08:00
.globl _start, f1, f2
_start:
ret
.section .text.f1, "ax"
f1:
.cfi_startproc
ret
.cfi_endproc
.section .text.f2, "ax"
f2:
.cfi_startproc
ret
.cfi_endproc