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target/i386: Create helper_check_io

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Drop helper_check_io[bwl] and expose their common
subroutine to tcg directly.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210514151342.384376-49-richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-05-14 10:13:40 -05:00
parent 1bca40fe42
commit e497803556
3 changed files with 5 additions and 34 deletions
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4
target/i386/helper.h
View File

@ -86,9 +86,7 @@ DEF_HELPER_1(rdtsc, void, env)
DEF_HELPER_1(rdtscp, void, env)
DEF_HELPER_FLAGS_1(rdpmc, TCG_CALL_NO_WG, noreturn, env)
DEF_HELPER_2(check_iob, void, env, i32)
DEF_HELPER_2(check_iow, void, env, i32)
DEF_HELPER_2(check_iol, void, env, i32)
DEF_HELPER_FLAGS_3(check_io, TCG_CALL_NO_WG, void, env, i32, i32)
DEF_HELPER_3(outb, void, env, i32, i32)
DEF_HELPER_2(inb, tl, env, i32)
DEF_HELPER_3(outw, void, env, i32, i32)

21
target/i386/tcg/seg_helper.c
View File

@ -2418,10 +2418,10 @@ void helper_verw(CPUX86State *env, target_ulong selector1)
}
/* check if Port I/O is allowed in TSS */
static inline void check_io(CPUX86State *env, int addr, int size,
uintptr_t retaddr)
void helper_check_io(CPUX86State *env, uint32_t addr, uint32_t size)
{
int io_offset, val, mask;
uintptr_t retaddr = GETPC();
uint32_t io_offset, val, mask;
/* TSS must be a valid 32 bit one */
if (!(env->tr.flags & DESC_P_MASK) ||
@ -2444,18 +2444,3 @@ static inline void check_io(CPUX86State *env, int addr, int size,
raise_exception_err_ra(env, EXCP0D_GPF, 0, retaddr);
}
}
void helper_check_iob(CPUX86State *env, uint32_t t0)
{
check_io(env, t0, 1, GETPC());
}
void helper_check_iow(CPUX86State *env, uint32_t t0)
{
check_io(env, t0, 2, GETPC());
}
void helper_check_iol(CPUX86State *env, uint32_t t0)
{
check_io(env, t0, 4, GETPC());
}

14
target/i386/tcg/translate.c
View File

@ -682,19 +682,7 @@ static bool gen_check_io(DisasContext *s, MemOp ot, TCGv_i32 port,
uint32_t svm_flags)
{
if (PE(s) && (CPL(s) > IOPL(s) || VM86(s))) {
switch (ot) {
case MO_8:
gen_helper_check_iob(cpu_env, port);
break;
case MO_16:
gen_helper_check_iow(cpu_env, port);
break;
case MO_32:
gen_helper_check_iol(cpu_env, port);
break;
default:
tcg_abort();
}
gen_helper_check_io(cpu_env, port, tcg_constant_i32(1 << ot));
}
if (GUEST(s)) {
target_ulong cur_eip = s->base.pc_next - s->cs_base;