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[PATCH 04/22] target/i386: Create gen_update_eip_cur
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From: |
Richard Henderson |
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Subject: |
[PATCH 04/22] target/i386: Create gen_update_eip_cur |
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Date: |
Mon, 22 Aug 2022 16:33:00 -0700 |
Like gen_update_cc_op, sync EIP before doing something
that could raise an exception. Replace all gen_jmp_im
that use s->base.pc_next.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/i386/tcg/translate.c | 52 ++++++++++++++++++++-----------------
1 file changed, 28 insertions(+), 24 deletions(-)
diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index d3b16ea28c..78b7641786 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -511,10 +511,14 @@ static inline void gen_op_st_rm_T0_A0(DisasContext *s,
int idx, int d)
}
}
-static inline void gen_jmp_im(DisasContext *s, target_ulong pc)
+static void gen_jmp_im(DisasContext *s, target_ulong pc)
{
- tcg_gen_movi_tl(s->tmp0, pc);
- gen_op_jmp_v(s->tmp0);
+ gen_op_jmp_v(tcg_constant_tl(pc));
+}
+
+static void gen_update_eip_cur(DisasContext *s)
+{
+ gen_jmp_im(s, s->base.pc_next - s->cs_base);
}
/* Compute SEG:REG into A0. SEG is selected from the override segment
@@ -703,7 +707,7 @@ static bool gen_check_io(DisasContext *s, MemOp ot,
TCGv_i32 port,
target_ulong next_eip = s->pc - s->cs_base;
gen_update_cc_op(s);
- gen_jmp_im(s, cur_eip);
+ gen_update_eip_cur(s);
if (s->prefix & (PREFIX_REPZ | PREFIX_REPNZ)) {
svm_flags |= SVM_IOIO_REP_MASK;
}
@@ -1335,7 +1339,7 @@ static void gen_helper_fp_arith_STN_ST0(int op, int opreg)
static void gen_exception(DisasContext *s, int trapno)
{
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_raise_exception(cpu_env, tcg_const_i32(trapno));
s->base.is_jmp = DISAS_NORETURN;
}
@@ -2605,7 +2609,7 @@ static void gen_unknown_opcode(CPUX86State *env,
DisasContext *s)
static void gen_interrupt(DisasContext *s, int intno)
{
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_raise_interrupt(cpu_env, tcg_constant_i32(intno),
tcg_constant_i32(s->pc - s->base.pc_next));
s->base.is_jmp = DISAS_NORETURN;
@@ -6683,7 +6687,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
do_lret:
if (PE(s) && !VM86(s)) {
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_lret_protected(cpu_env, tcg_const_i32(dflag - 1),
tcg_const_i32(val));
} else {
@@ -7179,7 +7183,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
}
if (prefixes & PREFIX_REPZ) {
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_pause(cpu_env, tcg_const_i32(s->pc - s->base.pc_next));
s->base.is_jmp = DISAS_NORETURN;
}
@@ -7205,7 +7209,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
if (CODE64(s))
goto illegal_op;
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_into(cpu_env, tcg_const_i32(s->pc - s->base.pc_next));
break;
#ifdef WANT_ICEBP
@@ -7312,7 +7316,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
case 0x132: /* rdmsr */
if (check_cpl0(s)) {
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
if (b & 2) {
gen_helper_rdmsr(cpu_env);
} else {
@@ -7324,7 +7328,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
break;
case 0x131: /* rdtsc */
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
if (tb_cflags(s->base.tb) & CF_USE_ICOUNT) {
gen_io_start();
}
@@ -7335,7 +7339,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
break;
case 0x133: /* rdpmc */
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_rdpmc(cpu_env);
s->base.is_jmp = DISAS_NORETURN;
break;
@@ -7365,7 +7369,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
case 0x105: /* syscall */
/* XXX: is it usable in real mode ? */
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_syscall(cpu_env, tcg_const_i32(s->pc - s->base.pc_next));
/* TF handling for the syscall insn is different. The TF bit is
checked
after the syscall insn completes. This allows #DB to not be
@@ -7391,13 +7395,13 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
#endif
case 0x1a2: /* cpuid */
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_cpuid(cpu_env);
break;
case 0xf4: /* hlt */
if (check_cpl0(s)) {
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_hlt(cpu_env, tcg_const_i32(s->pc - s->base.pc_next));
s->base.is_jmp = DISAS_NORETURN;
}
@@ -7494,7 +7498,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
goto illegal_op;
}
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
tcg_gen_mov_tl(s->A0, cpu_regs[R_EAX]);
gen_extu(s->aflag, s->A0);
gen_add_A0_ds_seg(s);
@@ -7506,7 +7510,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
goto illegal_op;
}
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_mwait(cpu_env, tcg_const_i32(s->pc - s->base.pc_next));
s->base.is_jmp = DISAS_NORETURN;
break;
@@ -7584,7 +7588,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
break;
}
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_vmrun(cpu_env, tcg_const_i32(s->aflag - 1),
tcg_const_i32(s->pc - s->base.pc_next));
tcg_gen_exit_tb(NULL, 0);
@@ -7596,7 +7600,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
goto illegal_op;
}
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_vmmcall(cpu_env);
break;
@@ -7608,7 +7612,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
break;
}
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_vmload(cpu_env, tcg_const_i32(s->aflag - 1));
break;
@@ -7620,7 +7624,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
break;
}
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_vmsave(cpu_env, tcg_const_i32(s->aflag - 1));
break;
@@ -7646,7 +7650,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
break;
}
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
gen_helper_clgi(cpu_env);
break;
@@ -7792,7 +7796,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
goto illegal_op;
}
gen_update_cc_op(s);
- gen_jmp_im(s, s->base.pc_next - s->cs_base);
+ gen_update_eip_cur(s);
if (tb_cflags(s->base.tb) & CF_USE_ICOUNT) {
gen_io_start();
}
@@ -8705,7 +8709,7 @@ static void i386_tr_tb_stop(DisasContextBase *dcbase,
CPUState *cpu)
DisasContext *dc = container_of(dcbase, DisasContext, base);
if (dc->base.is_jmp == DISAS_TOO_MANY) {
- gen_jmp_im(dc, dc->base.pc_next - dc->cs_base);
+ gen_update_eip_cur(dc);
gen_eob(dc);
}
}
--
2.34.1
- [PATCH 00/22] target/i386: pc-relative translation, Richard Henderson, 2022/08/22
- [PATCH 01/22] target/i386: Return bool from disas_insn, Richard Henderson, 2022/08/22
- [PATCH 03/22] target/i386: Remove cur_eip, next_eip arguments to gen_interrupt, Richard Henderson, 2022/08/22
- [PATCH 02/22] target/i386: Remove cur_eip argument to gen_exception, Richard Henderson, 2022/08/22
- [PATCH 04/22] target/i386: Create gen_update_eip_cur,
Richard Henderson <=
- [PATCH 05/22] target/i386: Create gen_update_eip_next, Richard Henderson, 2022/08/22
- [PATCH 06/22] target/i386: Introduce DISAS_EOB*, Richard Henderson, 2022/08/22
- [PATCH 07/22] target/i386: Use DISAS_EOB* in gen_movl_seg_T0, Richard Henderson, 2022/08/22
- [PATCH 08/22] target/i386: Use DISAS_EOB_NEXT, Richard Henderson, 2022/08/22
- [PATCH 10/22] target/i386: Create cur_insn_len, cur_insn_len_i32, Richard Henderson, 2022/08/22
- [PATCH 09/22] target/i386: USe DISAS_EOB_ONLY, Richard Henderson, 2022/08/22
- [PATCH 13/22] target/i386: Truncate values for lcall_real to i32, Richard Henderson, 2022/08/22
- [PATCH 15/22] target/i386: Use DISAS_TOO_MANY to exit after gen_io_start, Richard Henderson, 2022/08/22
- [PATCH 16/22] target/i386: Create gen_jmp_rel, Richard Henderson, 2022/08/22
- [PATCH 17/22] target/i386: Use gen_jmp_rel for loop and jecxz insns, Richard Henderson, 2022/08/22