[Qemu-devel] [PATCH 2/2 for-2.6] target-sparc: fix Trap Based Address Register behavior for sparc64

[Artyom Tarasenko <atar4qemu@gmail.com>]

Accoding the chapter 7.6 Trap Processing of the SPARC Architecture Manual v9,
the Trap Based Address Register is not modified as a trap is taken.

This fix allows booting FreeBSD-10.3-RELEASE-sparc64.

Signed-off-by: Artyom Tarasenko <atar4qemu@gmail.com>
---
 target-sparc/int64_helper.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/target-sparc/int64_helper.c b/target-sparc/int64_helper.c
index aa876cd..29360fa 100644
--- a/target-sparc/int64_helper.c
+++ b/target-sparc/int64_helper.c
@@ -158,9 +158,8 @@ void sparc_cpu_do_interrupt(CPUState *cs)
     } else if ((intno & 0x1c0) == TT_FILL) {
         cpu_set_cwp(env, cpu_cwp_inc(env, env->cwp + 1));
     }
-    env->tbr &= ~0x7fffULL;
-    env->tbr |= ((env->tl > 1) ? 1 << 14 : 0) | (intno << 5);
-    env->pc = env->tbr;
+    env->pc = env->tbr  & ~0x7fffULL;
+    env->pc |= ((env->tl > 1) ? 1 << 14 : 0) | (intno << 5);
     env->npc = env->pc + 4;
     cs->exception_index = -1;
 }
-- 
1.8.3.1