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| author | H.J. Lu <hjl.tools@gmail.com> | 2020-05-01 10:11:06 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2020-05-01 10:11:23 -0700 |
| commit | ccf20d460f73c48f3334e1401558df342c77ac8a (patch) | |
| tree | 80cf7c6bb978934ed96849825b7c0e8e6bd14721 /gold/ChangeLog | |
| parent | 6d520e36de0229eefe2f1671438cc8333a90b5e6 (diff) | |
| download | gdb-ccf20d460f73c48f3334e1401558df342c77ac8a.zip gdb-ccf20d460f73c48f3334e1401558df342c77ac8a.tar.gz gdb-ccf20d460f73c48f3334e1401558df342c77ac8a.tar.bz2 | |
gold: x86-64: Fix TLSDESC relaxation for x32
X32 TLSDESC sequences can be:
40 8d 05 00 00 00 00 rex lea foo@TLSDESC(%rip), %reg
...
67 ff 10 call *foo@TLSCALL(%eax)
or the same sequence as LP64:
48 8d 05 00 00 00 00 lea foo@TLSDESC(%rip), %reg
...
ff 10 call *foo@TLSCALL(%rax)
We need to support both sequences for x32. For both GDesc -> IE/LE
transitions,
67 ff 10 call *foo@TLSCALL(%eax)
should relaxed to
0f 1f 00 nopl (%rax)
For GDesc -> LE transition,
40 8d 05 00 00 00 00 rex lea foo@TLSDESC(%rip), %reg
should relaxed to
40 c7 c0 fc ff ff ff rex movl $foo@tpoff, %reg
For GDesc -> IE transition,
40 8d 05 00 00 00 00 rex lea foo@TLSDESC(%rip), %reg
should relaxed to
40 8b 05 00 00 00 00 rex movl foo@gottpoff(%rip), %eax
PR gold/25426
* x86_64.cc (Target_x86_64<size>::Relocate::tls_desc_gd_to_ie):
For x32, relax "rex leal foo@tlsdesc(%rip), %reg" to
"rex movl foo@gottpoff(%rip), %eax" and relax ""call *(%eax)"
to "nopl (%rax)".
(Target_x86_64<size>::Relocate::tls_desc_gd_to_le): For x32,
relax "rex leal foo@tlsdesc(%rip), %reg" to
"rex movl foo@tpoff, %eax" and relax "call *foo@tlscall(%eax)"
to "nopl (%rax)".
* testsuite/Makefile.am (tls_test_gnu2.o): Depend on
gcctestdir/as.
(tls_test_file2_gnu2.o): Likewise.
(tls_test_c_gnu2.o): Likewise.
* testsuite/Makefile.in: Regenerated.
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 0b7cb07..23fb070 100644 --- a/gold/ChangeLog +++ b/gold/ChangeLog @@ -1,5 +1,22 @@ 2020-05-01 H.J. Lu <hongjiu.lu@intel.com> + PR gold/25426 + * x86_64.cc (Target_x86_64<size>::Relocate::tls_desc_gd_to_ie): + For x32, relax "rex leal foo@tlsdesc(%rip), %reg" to + "rex movl foo@gottpoff(%rip), %eax" and relax ""call *(%eax)" + to "nopl (%rax)". + (Target_x86_64<size>::Relocate::tls_desc_gd_to_le): For x32, + relax "rex leal foo@tlsdesc(%rip), %reg" to + "rex movl foo@tpoff, %eax" and relax "call *foo@tlscall(%eax)" + to "nopl (%rax)". + * testsuite/Makefile.am (tls_test_gnu2.o): Depend on + gcctestdir/as. + (tls_test_file2_gnu2.o): Likewise. + (tls_test_c_gnu2.o): Likewise. + * testsuite/Makefile.in: Regenerated. + +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". |