Jez Ng e183bf8e15 [lld-macho][reland] Initial support for EH Frames
This reverts commit 942f4e3a7cc9a9f8b2654817cff12907d1276031.

The additional change required to avoid the assertion errors seen
previously is:

  --- a/lld/MachO/ICF.cpp
  +++ b/lld/MachO/ICF.cpp
  @@ -443,7 +443,9 @@ void macho::foldIdenticalSections() {
                                 /*relocVA=*/0);
           isec->data = copy;
         }
  -    } else {
  +    } else if (!isEhFrameSection(isec)) {
  +      // EH frames are gathered as hashables from unwindEntry above; give a
  +      // unique ID to everything else.
         isec->icfEqClass[0] = ++icfUniqueID;
       }
     }

Differential Revision: https://reviews.llvm.org/D123435
2022-06-13 07:45:16 -04:00

84 lines
2.7 KiB
ArmAsm

# REQUIRES: x86
# RUN: rm -rf %t; split-file %s %t
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos10.15 %t/too-small-1.s -o %t/too-small-1.o
# RUN: not %lld -lSystem -dylib %t/too-small-1.o -o /dev/null 2>&1 | FileCheck %s --check-prefix TOO-SMALL-1
# TOO-SMALL-1: error: {{.*}}too-small-1.o:(__eh_frame+0x0): CIE/FDE too small
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos10.15 %t/too-small-2.s -o %t/too-small-2.o
# RUN: not %lld -lSystem -dylib %t/too-small-2.o -o /dev/null 2>&1 | FileCheck %s --check-prefix TOO-SMALL-2
# TOO-SMALL-2: error: {{.*}}too-small-2.o:(__eh_frame+0x0): CIE/FDE extends past the end of the section
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos10.15 %t/personality-enc.s -o %t/personality-enc.o
# RUN: not %lld -lSystem -dylib %t/personality-enc.o -o /dev/null 2>&1 | FileCheck %s --check-prefix PERS-ENC
# PERS-ENC: error: {{.*}}personality-enc.o:(__eh_frame+0x12): unexpected personality encoding 0xb
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos10.15 %t/pointer-enc.s -o %t/pointer-enc.o
# RUN: not %lld -lSystem -dylib %t/pointer-enc.o -o /dev/null 2>&1 | FileCheck %s --check-prefix PTR-ENC
# PTR-ENC: error: {{.*}}pointer-enc.o:(__eh_frame+0x11): unexpected pointer encoding 0x12
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos10.15 %t/string-err.s -o %t/string-err.o
# RUN: not %lld -lSystem -dylib %t/string-err.o -o /dev/null 2>&1 | FileCheck %s --check-prefix STR
# STR: error: {{.*}}string-err.o:(__eh_frame+0x9): corrupted CIE (failed to read string)
#--- too-small-1.s
.p2align 3
.section __TEXT,__eh_frame
.short 0x3
.subsections_via_symbols
#--- too-small-2.s
.p2align 3
.section __TEXT,__eh_frame
.long 0x3 # length
.subsections_via_symbols
#--- personality-enc.s
.p2align 3
.section __TEXT,__eh_frame
.long 0x14 # length
.long 0 # CIE offset
.byte 1 # version
.asciz "zPR" # aug string
.byte 0x01 # code alignment
.byte 0x78 # data alignment
.byte 0x10 # return address register
.byte 0x01 # aug length
.byte 0x0b # personality encoding
.long 0xffff # personality pointer
.byte 0x10 # pointer encoding
.space 1 # pad to alignment
.subsections_via_symbols
#--- pointer-enc.s
.p2align 3
.section __TEXT,__eh_frame
.long 0x14 # length
.long 0 # CIE offset
.byte 1 # version
.asciz "zR" # aug string
.byte 0x01 # code alignment
.byte 0x78 # data alignment
.byte 0x10 # return address register
.byte 0x01 # aug length
.byte 0x12 # pointer encoding
.space 7 # pad to alignment
.subsections_via_symbols
#--- string-err.s
.p2align 3
.section __TEXT,__eh_frame
.long 0x7 # length
.long 0 # CIE offset
.byte 1 # version
.ascii "zR" # invalid aug string
.subsections_via_symbols