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Fix Sparc64 window handling problems detected by Vince Weaver 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5091 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
blueswir1 2008-08-27 19:19:44 +00:00
parent a3772d4d44
commit eda5295302
1 changed files with 18 additions and 3 deletions
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21
linux-user/main.c
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@ -808,11 +808,16 @@ static void save_window(CPUSPARCState *env)
static void restore_window(CPUSPARCState *env)
{
unsigned int new_wim, i, cwp1;
#ifndef TARGET_SPARC64
unsigned int new_wim;
#endif
unsigned int i, cwp1;
abi_ulong sp_ptr;
#ifndef TARGET_SPARC64
new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
((1LL << env->nwindows) - 1);
#endif
/* restore the invalid window */
cwp1 = cpu_cwp_inc(env, env->cwp + 1);
@ -826,12 +831,13 @@ static void restore_window(CPUSPARCState *env)
get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
sp_ptr += sizeof(abi_ulong);
}
env->wim = new_wim;
#ifdef TARGET_SPARC64
env->canrestore++;
if (env->cleanwin < env->nwindows - 1)
env->cleanwin++;
env->cansave--;
#else
env->wim = new_wim;
#endif
}
@ -843,14 +849,23 @@ static void flush_windows(CPUSPARCState *env)
for(;;) {
/* if restore would invoke restore_window(), then we can stop */
cwp1 = cpu_cwp_inc(env, env->cwp + offset);
#ifndef TARGET_SPARC64
if (env->wim & (1 << cwp1))
break;
#else
if (env->canrestore == 0)
break;
env->cansave++;
env->canrestore--;
#endif
save_window_offset(env, cwp1);
offset++;
}
/* set wim so that restore will reload the registers */
cwp1 = cpu_cwp_inc(env, env->cwp + 1);
#ifndef TARGET_SPARC64
/* set wim so that restore will reload the registers */
env->wim = 1 << cwp1;
#endif
#if defined(DEBUG_WIN)
printf("flush_windows: nb=%d\n", offset - 1);
#endif