diff options
Diffstat (limited to 'target-i386/fpu_helper.c')
| -rw-r--r-- | target-i386/fpu_helper.c | 79 |
1 files changed, 76 insertions, 3 deletions
diff --git a/target-i386/fpu_helper.c b/target-i386/fpu_helper.c index 9750cd2206..9dfbc4c7a6 100644 --- a/target-i386/fpu_helper.c +++ b/target-i386/fpu_helper.c @@ -1168,6 +1168,22 @@ static void do_xsave_sse(CPUX86State *env, target_ulong ptr, uintptr_t ra) } } +static void do_xsave_bndregs(CPUX86State *env, target_ulong addr, uintptr_t ra) +{ + int i; + + for (i = 0; i < 4; i++, addr += 16) { + cpu_stq_data_ra(env, addr, env->bnd_regs[i].lb, ra); + cpu_stq_data_ra(env, addr + 8, env->bnd_regs[i].ub, ra); + } +} + +static void do_xsave_bndcsr(CPUX86State *env, target_ulong addr, uintptr_t ra) +{ + cpu_stq_data_ra(env, addr, env->bndcs_regs.cfgu, ra); + cpu_stq_data_ra(env, addr + 8, env->bndcs_regs.sts, ra); +} + void helper_fxsave(CPUX86State *env, target_ulong ptr) { uintptr_t ra = GETPC(); @@ -1192,9 +1208,16 @@ void helper_fxsave(CPUX86State *env, target_ulong ptr) static uint64_t get_xinuse(CPUX86State *env) { - /* We don't track XINUSE. We could calculate it here, but it's - probably less work to simply indicate all components in use. */ - return -1; + uint64_t inuse = -1; + + /* For the most part, we don't track XINUSE. We could calculate it + here for all components, but it's probably less work to simply + indicate in use. That said, the state of BNDREGS is important + enough to track in HFLAGS, so we might as well use that here. */ + if ((env->hflags & HF_MPX_IU_MASK) == 0) { + inuse &= ~XSTATE_BNDREGS; + } + return inuse; } static void do_xsave(CPUX86State *env, target_ulong ptr, uint64_t rfbm, @@ -1226,6 +1249,14 @@ static void do_xsave(CPUX86State *env, target_ulong ptr, uint64_t rfbm, if (opt & XSTATE_SSE) { do_xsave_sse(env, ptr, ra); } + if (opt & XSTATE_BNDREGS) { + target_ulong off = x86_ext_save_areas[XSTATE_BNDREGS].offset; + do_xsave_bndregs(env, ptr + off, ra); + } + if (opt & XSTATE_BNDCSR) { + target_ulong off = x86_ext_save_areas[XSTATE_BNDCSR].offset; + do_xsave_bndcsr(env, ptr + off, ra); + } /* Update the XSTATE_BV field. */ old_bv = cpu_ldq_data_ra(env, ptr + 512, ra); @@ -1291,6 +1322,23 @@ static void do_xrstor_sse(CPUX86State *env, target_ulong ptr, uintptr_t ra) } } +static void do_xrstor_bndregs(CPUX86State *env, target_ulong addr, uintptr_t ra) +{ + int i; + + for (i = 0; i < 4; i++, addr += 16) { + env->bnd_regs[i].lb = cpu_ldq_data_ra(env, addr, ra); + env->bnd_regs[i].ub = cpu_ldq_data_ra(env, addr + 8, ra); + } +} + +static void do_xrstor_bndcsr(CPUX86State *env, target_ulong addr, uintptr_t ra) +{ + /* FIXME: Extend highest implemented bit of linear address. */ + env->bndcs_regs.cfgu = cpu_ldq_data_ra(env, addr, ra); + env->bndcs_regs.sts = cpu_ldq_data_ra(env, addr + 8, ra); +} + void helper_fxrstor(CPUX86State *env, target_ulong ptr) { uintptr_t ra = GETPC(); @@ -1371,6 +1419,25 @@ void helper_xrstor(CPUX86State *env, target_ulong ptr, uint64_t rfbm) memset(env->xmm_regs, 0, sizeof(env->xmm_regs)); } } + if (rfbm & XSTATE_BNDREGS) { + if (xstate_bv & XSTATE_BNDREGS) { + target_ulong off = x86_ext_save_areas[XSTATE_BNDREGS].offset; + do_xrstor_bndregs(env, ptr + off, ra); + env->hflags |= HF_MPX_IU_MASK; + } else { + memset(env->bnd_regs, 0, sizeof(env->bnd_regs)); + env->hflags &= ~HF_MPX_IU_MASK; + } + } + if (rfbm & XSTATE_BNDCSR) { + if (xstate_bv & XSTATE_BNDCSR) { + target_ulong off = x86_ext_save_areas[XSTATE_BNDCSR].offset; + do_xrstor_bndcsr(env, ptr + off, ra); + } else { + memset(&env->bndcs_regs, 0, sizeof(env->bndcs_regs)); + } + cpu_sync_bndcs_hflags(env); + } } uint64_t helper_xgetbv(CPUX86State *env, uint32_t ecx) @@ -1414,7 +1481,13 @@ void helper_xsetbv(CPUX86State *env, uint32_t ecx, uint64_t mask) goto do_gpf; } + /* Disallow enabling only half of MPX. */ + if ((mask ^ (mask * (XSTATE_BNDCSR / XSTATE_BNDREGS))) & XSTATE_BNDCSR) { + goto do_gpf; + } + env->xcr0 = mask; + cpu_sync_bndcs_hflags(env); return; do_gpf: |