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[ELF] Support 'G' in .eh_frame 

Reviewed By: MaskRay, eugenis

Differential Revision: https://reviews.llvm.org/D127148
This commit is contained in:
Florian Mayer 2022-06-06 17:56:22 -07:00
parent 5b1c5fc53a
commit 40f34fe4a8
2 changed files with 19 additions and 2 deletions
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4
lld/ELF/EhFrame.cpp
View File

@ -171,7 +171,7 @@ uint8_t EhReader::getFdeEncoding() {
readByte();
else if (c == 'P')
skipAugP();
else if (c != 'B' && c != 'S')
else if (c != 'B' && c != 'S' && c != 'G')
failOn(aug.data(), "unknown .eh_frame augmentation string: " + aug);
}
return DW_EH_PE_absptr;
@ -188,7 +188,7 @@ bool EhReader::hasLSDA() {
skipAugP();
else if (c == 'R')
readByte();
else if (c != 'B' && c != 'S')
else if (c != 'B' && c != 'S' && c != 'G')
failOn(aug.data(), "unknown .eh_frame augmentation string: " + aug);
}
return false;

17
lld/test/ELF/stack-tagging-cfi.s Normal file
View File

@ -0,0 +1,17 @@
# RUN: llvm-mc -filetype=obj -triple aarch64 -mattr=+mte %s -o %t.o
# RUN: ld.lld --eh-frame-hdr %t.o -o %t
# RUN: llvm-objdump --dwarf=frames %t | FileCheck %s
# CHECK: Augmentation: "zRG"
.text
.globl WithUnwind
.p2align 2
.type WithUnwind,@function
WithUnwind:
.cfi_startproc
.cfi_mte_tagged_frame
ret
.Lfunc_end0:
.size WithUnwind, .Lfunc_end0-WithUnwind
.cfi_endproc