linux-kernel - [2.6.30-rc8 KVM] gcc 3.3 dies at emulate_2op

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Message-Id: <200906050539.n555dwAQ077095@www262.sakura.ne.jp>
Date:	Fri, 05 Jun 2009 14:39:58 +0900
From:	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:	guillaume.thouvenin@....bull.net, avi@...hat.com
Cc:	linux-kernel@...r.kernel.org
Subject: [2.6.30-rc8 KVM] gcc 3.3 dies at emulate_2op_cl().

(Continued from http://lkml.org/lkml/2009/6/4/14 )
I tried to identify the location of gcc 3.3's internal error using
"make CONFIG_DEBUG_INFO=1 arch/x86/kvm/x86_emulate.s", and it turned out that
the location is emulate_2op_cl().

Commenting out like below solves the gcc's internal error.

diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c
index ca91749..561b9b6 100644
--- a/arch/x86/kvm/x86_emulate.c
+++ b/arch/x86/kvm/x86_emulate.c
@@ -2070,7 +2070,7 @@ twobyte_insn:
                break;
        case 0xa4: /* shld imm8, r, r/m */
        case 0xa5: /* shld cl, r, r/m */
-               emulate_2op_cl("shld", c->src2, c->src, c->dst, ctxt->eflags);
+               //emulate_2op_cl("shld", c->src2, c->src, c->dst, ctxt->eflags);
                break;
        case 0xab:
              bts:              /* bts */
@@ -2080,7 +2080,7 @@ twobyte_insn:
                break;
        case 0xac: /* shrd imm8, r, r/m */
        case 0xad: /* shrd cl, r, r/m */
-               emulate_2op_cl("shrd", c->src2, c->src, c->dst, ctxt->eflags);
+               //emulate_2op_cl("shrd", c->src2, c->src, c->dst, ctxt->eflags);
                break;
        case 0xae:              /* clflush */
                break;

I think something is wrong with emulate_2op_cl() when compiled with gcc 3.3.5 .

Regards.
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