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[Bug binutils/25403] New: [AArch64, ARMv8.4] objdump doesn't disassemble
From: |
james.boyle at arm dot com |
Subject: |
[Bug binutils/25403] New: [AArch64, ARMv8.4] objdump doesn't disassemble cfinv correctly |
Date: |
Thu, 16 Jan 2020 18:14:58 +0000 |
https://sourceware.org/bugzilla/show_bug.cgi?id=25403
Bug ID: 25403
Summary: [AArch64, ARMv8.4] objdump doesn't disassemble cfinv
correctly
Product: binutils
Version: 2.34 (HEAD)
Status: UNCONFIRMED
Severity: minor
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: james.boyle at arm dot com
Target Milestone: ---
cfinv (opcode 0xd500401f) for flag manipulation instruction (from ARMv8.4
extension) decodes incorrectly as:
msr s0_0_c4_c0_0, xzr
It should decode as:
cfinv
I used:
$ echo "cfinv" | aarch64-none-linux-gnu-as -march=armv8.4-a
Which assembles ok. Then running:
$ ./objdump -D
a.out: file format elf64-littleaarch64
Disassembly of section .text:
0000000000000000 <.text>:
0: d500401f msr s0_0_c4_c0_0, xzr
It looks like in commit e9dbdd80cb02ac66cf7d4cd1207ec11928db2c95 (Thu, 16 Nov
2017) a change was made to support this along with other flag manipulation
instructions, but cfinv disassembly seems to have been broken from the outset.
Looking at test gas/testsuite/gas/aarch64/armv8_4-a.d it never appeared.
I think the other v8.4 flag manipulation instructions are disassembling
correctly.
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- [Bug binutils/25403] New: [AArch64, ARMv8.4] objdump doesn't disassemble cfinv correctly,
james.boyle at arm dot com <=
- [Bug binutils/25403] [AArch64, ARMv8.4] objdump doesn't disassemble cfinv correctly, cvs-commit at gcc dot gnu.org, 2020/01/27
- [Bug binutils/25403] [AArch64, ARMv8.4] objdump doesn't disassemble cfinv correctly, cvs-commit at gcc dot gnu.org, 2020/01/27
- [Bug binutils/25403] [AArch64, ARMv8.4] objdump doesn't disassemble cfinv correctly, cvs-commit at gcc dot gnu.org, 2020/01/27
- [Bug binutils/25403] [AArch64, ARMv8.4] objdump doesn't disassemble cfinv correctly, tnfchris at sourceware dot org, 2020/01/27