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| author | Eric Botcazou <ebotcazou@adacore.com> | 2018-12-12 11:40:28 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2018-12-12 11:40:28 +0000 |
| commit | bf4eca2e562d036f109f1782e95b233453b0d503 (patch) | |
| tree | eba67c59329144a5a95f7b2dac92239b462a7be7 | |
| parent | 9c47a019948f5caf12e7726001e15fefcb32d065 (diff) | |
| download | gcc-bf4eca2e562d036f109f1782e95b233453b0d503.zip gcc-bf4eca2e562d036f109f1782e95b233453b0d503.tar.gz gcc-bf4eca2e562d036f109f1782e95b233453b0d503.tar.bz2 | |
re PR target/86806 (SPARC port needs updating for CVE-2017-5753)
PR target/86806
* config/sparc/sparc.md (unspecv): Add UNSPECV_SPECULATION_BARRIER.
(speculation_barrier): New instruction for V9.
From-SVN: r267053
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/sparc/sparc.md | 11 |
2 files changed, 17 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 2a6916b..2026219 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2018-12-12 Eric Botcazou <ebotcazou@adacore.com> + + PR target/86806 + * config/sparc/sparc.md (unspecv): Add UNSPECV_SPECULATION_BARRIER. + (speculation_barrier): New instruction for V9. + 2018-12-12 Segher Boessenkool <segher@kernel.crashing.org> Iain Sandoe <iain@sandoe.co.uk> diff --git a/gcc/config/sparc/sparc.md b/gcc/config/sparc/sparc.md index df76940..431993c 100644 --- a/gcc/config/sparc/sparc.md +++ b/gcc/config/sparc/sparc.md @@ -104,6 +104,9 @@ (define_c_enum "unspecv" [ UNSPECV_BLOCKAGE + + UNSPECV_SPECULATION_BARRIER + UNSPECV_PROBE_STACK_RANGE UNSPECV_FLUSHW @@ -7309,6 +7312,14 @@ visl") "" [(set_attr "length" "0")]) +;; We use membar #Sync for the speculation barrier on V9. + +(define_insn "speculation_barrier" + [(unspec_volatile [(const_int 0)] UNSPECV_SPECULATION_BARRIER)] + "TARGET_V9" + "membar\t64" + [(set_attr "type" "multi")]) + (define_expand "probe_stack" [(set (match_operand 0 "memory_operand" "") (const_int 0))] "" |