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[PATCH] linux-user/sparc64: Translate flushw opcode
From: |
LemonBoy |
Subject: |
[PATCH] linux-user/sparc64: Translate flushw opcode |
Date: |
Fri, 10 Apr 2020 23:14:20 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 |
>From 11d0cfe58d12e0f191b435ade88622cfceb2098a Mon Sep 17 00:00:00 2001
From: LemonBoy <address@hidden>
Date: Fri, 10 Apr 2020 22:55:26 +0200
Subject: [PATCH] linux-user/sparc64: Translate flushw opcode
The ifdef logic should unconditionally compile in the `xop == 0x2b` case
when targeting sparc64.
Fix the handling of window spill traps by keeping cansave into account
when calculating the new CWP.
Signed-off-by: Giuseppe Musacchio <address@hidden>
---
bsd-user/main.c | 4 +++-
linux-user/sparc/cpu_loop.c | 4 +++-
target/sparc/translate.c | 2 ++
3 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/bsd-user/main.c b/bsd-user/main.c
index 770c2b267a..d6b1c997e3 100644
--- a/bsd-user/main.c
+++ b/bsd-user/main.c
@@ -413,7 +413,9 @@ static void save_window(CPUSPARCState *env)
save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
env->wim = new_wim;
#else
- save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
+ /* cansave is zero if the spill trap handler is triggered by `save` and */
+ /* nonzero if triggered by a `flushw` */
+ save_window_offset(env, cpu_cwp_dec(env, env->cwp - env->cansave - 2));
env->cansave++;
env->canrestore--;
#endif
diff --git a/linux-user/sparc/cpu_loop.c b/linux-user/sparc/cpu_loop.c
index 7645cc04ca..20a7401126 100644
--- a/linux-user/sparc/cpu_loop.c
+++ b/linux-user/sparc/cpu_loop.c
@@ -69,7 +69,9 @@ static void save_window(CPUSPARCState *env)
save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
env->wim = new_wim;
#else
- save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
+ /* cansave is zero if the spill trap handler is triggered by `save` and */
+ /* nonzero if triggered by a `flushw` */
+ save_window_offset(env, cpu_cwp_dec(env, env->cwp - env->cansave - 2));
env->cansave++;
env->canrestore--;
#endif
diff --git a/target/sparc/translate.c b/target/sparc/translate.c
index 9416a551cf..1a4efd4ed6 100644
--- a/target/sparc/translate.c
+++ b/target/sparc/translate.c
@@ -3663,6 +3663,8 @@ static void disas_sparc_insn(DisasContext * dc, unsigned
int insn)
#endif
gen_store_gpr(dc, rd, cpu_tmp0);
break;
+#endif
+#if defined(TARGET_SPARC64) || !defined(CONFIG_USER_ONLY)
} else if (xop == 0x2b) { /* rdtbr / V9 flushw */
#ifdef TARGET_SPARC64
gen_helper_flushw(cpu_env);
--
2.20.1
- [PATCH] linux-user/sparc64: Translate flushw opcode,
LemonBoy <=