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target-i386: Implement BNDLDX, BNDSTX

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Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2015-07-07 14:08:41 +01:00
parent 75d14edcf5
commit bdd87b3b59
3 changed files with 158 additions and 0 deletions
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97
target-i386/mpx_helper.c
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@ -59,3 +59,100 @@ void helper_bndck(CPUX86State *env, uint32_t fail)
raise_exception_ra(env, EXCP05_BOUND, GETPC());
}
}
static uint64_t lookup_bte64(CPUX86State *env, uint64_t base, uintptr_t ra)
{
uint64_t bndcsr, bde, bt;
if ((env->hflags & HF_CPL_MASK) == 3) {
bndcsr = env->bndcs_regs.cfgu;
} else {
bndcsr = env->msr_bndcfgs;
}
bde = (extract64(base, 20, 28) << 3) + (extract64(bndcsr, 20, 44) << 12);
bt = cpu_ldq_data_ra(env, bde, ra);
if ((bt & 1) == 0) {
env->bndcs_regs.sts = bde | 2;
raise_exception_ra(env, EXCP05_BOUND, ra);
}
return (extract64(base, 3, 17) << 5) + (bt & ~7);
}
static uint32_t lookup_bte32(CPUX86State *env, uint32_t base, uintptr_t ra)
{
uint32_t bndcsr, bde, bt;
if ((env->hflags & HF_CPL_MASK) == 3) {
bndcsr = env->bndcs_regs.cfgu;
} else {
bndcsr = env->msr_bndcfgs;
}
bde = (extract32(base, 12, 20) << 2) + (bndcsr & TARGET_PAGE_MASK);
bt = cpu_ldl_data_ra(env, bde, ra);
if ((bt & 1) == 0) {
env->bndcs_regs.sts = bde | 2;
raise_exception_ra(env, EXCP05_BOUND, ra);
}
return (extract32(base, 2, 10) << 4) + (bt & ~3);
}
uint64_t helper_bndldx64(CPUX86State *env, target_ulong base, target_ulong ptr)
{
uintptr_t ra = GETPC();
uint64_t bte, lb, ub, pt;
bte = lookup_bte64(env, base, ra);
lb = cpu_ldq_data_ra(env, bte, ra);
ub = cpu_ldq_data_ra(env, bte + 8, ra);
pt = cpu_ldq_data_ra(env, bte + 16, ra);
if (pt != ptr) {
lb = ub = 0;
}
env->mmx_t0.MMX_Q(0) = ub;
return lb;
}
uint64_t helper_bndldx32(CPUX86State *env, target_ulong base, target_ulong ptr)
{
uintptr_t ra = GETPC();
uint32_t bte, lb, ub, pt;
bte = lookup_bte32(env, base, ra);
lb = cpu_ldl_data_ra(env, bte, ra);
ub = cpu_ldl_data_ra(env, bte + 4, ra);
pt = cpu_ldl_data_ra(env, bte + 8, ra);
if (pt != ptr) {
lb = ub = 0;
}
return ((uint64_t)ub << 32) | lb;
}
void helper_bndstx64(CPUX86State *env, target_ulong base, target_ulong ptr,
uint64_t lb, uint64_t ub)
{
uintptr_t ra = GETPC();
uint64_t bte;
bte = lookup_bte64(env, base, ra);
cpu_stq_data_ra(env, bte, lb, ra);
cpu_stq_data_ra(env, bte + 8, ub, ra);
cpu_stq_data_ra(env, bte + 16, ptr, ra);
}
void helper_bndstx32(CPUX86State *env, target_ulong base, target_ulong ptr,
uint64_t lb, uint64_t ub)
{
uintptr_t ra = GETPC();
uint32_t bte;
bte = lookup_bte32(env, base, ra);
cpu_stl_data_ra(env, bte, lb, ra);
cpu_stl_data_ra(env, bte + 4, ub, ra);
cpu_stl_data_ra(env, bte + 8, ptr, ra);
}