llvm-project/lld/test/ELF/invalid-cie-length4.s

// REQUIRES: x86

// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t
// RUN: not ld.lld %t -o %t2 2>&1 | FileCheck %s

 .section .eh_frame
 .long 0xFFFFFFFF
 .byte 0

// CHECK: CIE/FDE too large
[ELF] - implement support of extended length field for CIE/FDE records of eh_frame. Ian Lance Taylor writes: "Read 4 bytes. If they are not 0xffffffff, they are the length of the CIE or FDE record. Otherwise the next 64 bits holds the length, and this is a 64-bit DWARF format. This is like .debug_frame." (http://www.airs.com/blog/archives/460), that also consistent with spec (https://refspecs.linuxfoundation.org/LSB_3.0.0/LSB-PDA/LSB-PDA/ehframechpt.html). Patch implements support of described extended length field and also adds few more checks for safety. Differential revision: http://reviews.llvm.org/D15532 llvm-svn: 255883 2015-12-17 17:23:40 +08:00			`// REQUIRES: x86`

			`// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t`
			`// RUN: not ld.lld %t -o %t2 2>&1 \| FileCheck %s`

			`.section .eh_frame`
			`.long 0xFFFFFFFF`
			`.byte 0`

Refactor EHOutputSection. This patch refactors EHOutputSection using SectionPiece struct. EHRegion class was removed since we can now directly use SectionPiece. An incomplete support of large CIE/FDE record (> 2^32 bytes) was removed because it silently created broken executable. There are several places in the existing code that "size" field is always 4 bytes and at offset 4 in the record, which is not true for 64-bit size records. We will have to support that in future, but it is better to error out instead of creating malformed eh_frame sections. llvm-svn: 270382 2016-05-23 07:16:14 +08:00			`// CHECK: CIE/FDE too large`