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llvm-project/lld/test/ELF/eh-frame-hdr-no-out2.s

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Reapply r257753 with fix: Added check for terminator CIE/FDE which has zero data size. void EHOutputSection<ELFT>::addSectionAux( ... // If CIE/FDE data length is zero then Length is 4, this // shall be considered a terminator and processing shall end. if (Length == 4) break; ... After this "Bug 25923 - lld/ELF2 linked application crashes if exceptions were used." is fixed for me. Self link of clang also works. Initial commit message: [ELF] - implemented --eh-frame-hdr command line option. --eh-frame-hdr Request creation of ".eh_frame_hdr" section and ELF "PT_GNU_EH_FRAME" segment header. Both gold and the GNU linker support an option --eh-frame-hdr which tell them to construct a header for all the .eh_frame sections. This header is placed in a section named .eh_frame_hdr and also in a PT_GNU_EH_FRAME segment. At runtime the unwinder can find all the PT_GNU_EH_FRAME segments by calling dl_iterate_phdr. This section contains a lookup table for quick binary search of FDEs. Detailed info can be found here: http://www.airs.com/blog/archives/462 Differential revision: http://reviews.llvm.org/D15712 llvm-svn: 257889
2016-01-15 21:34:52 +08:00
// REQUIRES: x86
// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
// RUN: ld.lld --eh-frame-hdr %t.o -o %t
// RUN: llvm-readobj -s -program-headers %t | FileCheck %s --check-prefix=NOHDR
.section foo,"ax",@progbits
nop
.text
Remove unnecessary trailing semicolons. Since this semicolon existed in an early test file, it has spread to many files. llvm-svn: 267659
2016-04-27 10:58:27 +08:00
.globl _start
Reapply r257753 with fix: Added check for terminator CIE/FDE which has zero data size. void EHOutputSection<ELFT>::addSectionAux( ... // If CIE/FDE data length is zero then Length is 4, this // shall be considered a terminator and processing shall end. if (Length == 4) break; ... After this "Bug 25923 - lld/ELF2 linked application crashes if exceptions were used." is fixed for me. Self link of clang also works. Initial commit message: [ELF] - implemented --eh-frame-hdr command line option. --eh-frame-hdr Request creation of ".eh_frame_hdr" section and ELF "PT_GNU_EH_FRAME" segment header. Both gold and the GNU linker support an option --eh-frame-hdr which tell them to construct a header for all the .eh_frame sections. This header is placed in a section named .eh_frame_hdr and also in a PT_GNU_EH_FRAME segment. At runtime the unwinder can find all the PT_GNU_EH_FRAME segments by calling dl_iterate_phdr. This section contains a lookup table for quick binary search of FDEs. Detailed info can be found here: http://www.airs.com/blog/archives/462 Differential revision: http://reviews.llvm.org/D15712 llvm-svn: 257889
2016-01-15 21:34:52 +08:00
_start:
// There is no .eh_frame section,
// therefore .eh_frame_hdr also not created.
// NOHDR: Sections [
// NOHDR-NOT: Name: .eh_frame
// NOHDR-NOT: Name: .eh_frame_hdr
// NOHDR: ProgramHeaders [
// NOHDR-NOT: PT_GNU_EH_FRAME