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| author | H.J. Lu <hjl.tools@gmail.com> | 2020-05-01 10:08:31 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2020-05-01 10:08:48 -0700 |
| commit | 6d520e36de0229eefe2f1671438cc8333a90b5e6 (patch) | |
| tree | 715843d140e793d17d2f3ef1728987bcf30704cc /gold/ChangeLog | |
| parent | e10cfd063328872efa721b4a08b9d52486fb5878 (diff) | |
| download | gdb-6d520e36de0229eefe2f1671438cc8333a90b5e6.zip gdb-6d520e36de0229eefe2f1671438cc8333a90b5e6.tar.gz gdb-6d520e36de0229eefe2f1671438cc8333a90b5e6.tar.bz2 | |
gold: x86-64: Fix TLSDESC -> LE relaxation
X86-64 TLSDESC sequences can be:
4c 8d 0d 00 00 00 00 leaq foo@TLSDESC(%rip), %r9
4c 89 c8 movq %r9, %rax
ff 10 call *foo@TLSCALL(%rax)
TLSDESC -> LE relaxation can turn them into:
49 c7 c1 fc ff ff ff mov $0xfffffffffffffffc,%r9
4c 89 c8 mov %r9,%rax
66 90 xchg %ax,%ax
We need to check and update the REX byte in this case.
PR gold/25473
* x86_64.cc (Target_x86_64<size>::Relocate::tls_desc_gd_to_ie):
Properly check r8 - r15 in "lea foo@TLSDESC(%rip), %reg".
(Target_x86_64<size>::Relocate::tls_desc_gd_to_le): Properly
relax r8 - r15 in "lea foo@TLSDESC(%rip), %reg".
* testsuite/Makefile.am (check_SCRIPTS): Add x86_64_gd_to_le.sh.
(check_DATA): Add x86_64_gd_to_le.stdout.
(MOSTLYCLEANFILES): Add x86_64_gd_to_le.
(x86_64_gd_to_le.o): New target.
(x86_64_gd_to_le): Likewise.
(x86_64_gd_to_le.stdout): Likewise.
* testsuite/Makefile.in: Regenerated.
* testsuite/x86_64_gd_to_le.s: New file.
* testsuite/x86_64_gd_to_le.sh: Likewise.
Diffstat (limited to 'gold/ChangeLog')
| -rw-r--r-- | gold/ChangeLog | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gold/ChangeLog b/gold/ChangeLog index 97044b6..0b7cb07 100644 --- a/gold/ChangeLog +++ b/gold/ChangeLog @@ -1,5 +1,22 @@ 2020-05-01 H.J. Lu <hongjiu.lu@intel.com> + PR gold/25473 + * x86_64.cc (Target_x86_64<size>::Relocate::tls_desc_gd_to_ie): + Properly check r8 - r15 in "lea foo@TLSDESC(%rip), %reg". + (Target_x86_64<size>::Relocate::tls_desc_gd_to_le): Properly + relax r8 - r15 in "lea foo@TLSDESC(%rip), %reg". + * testsuite/Makefile.am (check_SCRIPTS): Add x86_64_gd_to_le.sh. + (check_DATA): Add x86_64_gd_to_le.stdout. + (MOSTLYCLEANFILES): Add x86_64_gd_to_le. + (x86_64_gd_to_le.o): New target. + (x86_64_gd_to_le): Likewise. + (x86_64_gd_to_le.stdout): Likewise. + * testsuite/Makefile.in: Regenerated. + * testsuite/x86_64_gd_to_le.s: New file. + * testsuite/x86_64_gd_to_le.sh: Likewise. + +2020-05-01 H.J. Lu <hongjiu.lu@intel.com> + * testsuite/odr_violation2.cc (Ordering::operator()): Make expression even more complex. |