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target-i386: exception handling for seg_helper functions 

This patch fixes exception handling for seg_helper functions.

Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Pavel Dovgalyuk 2015-07-10 12:57:36 +03:00 committed by Richard Henderson
parent 2afbdf8480
commit 100ec09919
3 changed files with 335 additions and 327 deletions
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4
target-i386/helper.h
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@ -30,9 +30,9 @@ DEF_HELPER_2(verw, void, env, tl)
DEF_HELPER_2(lldt, void, env, int)
DEF_HELPER_2(ltr, void, env, int)
DEF_HELPER_3(load_seg, void, env, int, int)
DEF_HELPER_4(ljmp_protected, void, env, int, tl, int)
DEF_HELPER_4(ljmp_protected, void, env, int, tl, tl)
DEF_HELPER_5(lcall_real, void, env, int, tl, int, int)
DEF_HELPER_5(lcall_protected, void, env, int, tl, int, int)
DEF_HELPER_5(lcall_protected, void, env, int, tl, int, tl)
DEF_HELPER_2(iret_real, void, env, int)
DEF_HELPER_3(iret_protected, void, env, int, int)
DEF_HELPER_3(lret_protected, void, env, int, int)

616
target-i386/seg_helper.c
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File diff suppressed because it is too large Load Diff

42
target-i386/translate.c
View File

@ -663,14 +663,9 @@ static void gen_helper_out_func(TCGMemOp ot, TCGv_i32 v, TCGv_i32 n)
static void gen_check_io(DisasContext *s, TCGMemOp ot, target_ulong cur_eip,
uint32_t svm_flags)
{
int state_saved;
target_ulong next_eip;
state_saved = 0;
if (s->pe && (s->cpl > s->iopl || s->vm86)) {
gen_update_cc_op(s);
gen_jmp_im(cur_eip);
state_saved = 1;
tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
switch (ot) {
case MO_8:
@ -687,10 +682,8 @@ static void gen_check_io(DisasContext *s, TCGMemOp ot, target_ulong cur_eip,
}
}
if(s->flags & HF_SVMI_MASK) {
if (!state_saved) {
gen_update_cc_op(s);
gen_jmp_im(cur_eip);
}
gen_update_cc_op(s);
gen_jmp_im(cur_eip);
svm_flags |= (1 << (4 + ot));
next_eip = s->pc - s->cs_base;
tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
@ -2297,12 +2290,9 @@ static inline void gen_op_movl_seg_T0_vm(int seg_reg)
/* move T0 to seg_reg and compute if the CPU state may change. Never
call this function with seg_reg == R_CS */
static void gen_movl_seg_T0(DisasContext *s, int seg_reg, target_ulong cur_eip)
static void gen_movl_seg_T0(DisasContext *s, int seg_reg)
{
if (s->pe && !s->vm86) {
/* XXX: optimize by finding processor state dynamically */
gen_update_cc_op(s);
gen_jmp_im(cur_eip);
tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
gen_helper_load_seg(cpu_env, tcg_const_i32(seg_reg), cpu_tmp2_i32);
/* abort translation because the addseg value may change or
@ -4943,12 +4933,10 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
gen_op_ld_v(s, MO_16, cpu_T[0], cpu_A0);
do_lcall:
if (s->pe && !s->vm86) {
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
gen_helper_lcall_protected(cpu_env, cpu_tmp2_i32, cpu_T[1],
tcg_const_i32(dflag - 1),
tcg_const_i32(s->pc - pc_start));
tcg_const_tl(s->pc - s->cs_base));
} else {
tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
gen_helper_lcall_real(cpu_env, cpu_tmp2_i32, cpu_T[1],
@ -4970,11 +4958,9 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
gen_op_ld_v(s, MO_16, cpu_T[0], cpu_A0);
do_ljmp:
if (s->pe && !s->vm86) {
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
gen_helper_ljmp_protected(cpu_env, cpu_tmp2_i32, cpu_T[1],
tcg_const_i32(s->pc - pc_start));
tcg_const_tl(s->pc - s->cs_base));
} else {
gen_op_movl_seg_T0_vm(R_CS);
gen_op_jmp_v(cpu_T[1]);
@ -5311,7 +5297,7 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
goto illegal_op;
reg = b >> 3;
ot = gen_pop_T0(s);
gen_movl_seg_T0(s, reg, pc_start - s->cs_base);
gen_movl_seg_T0(s, reg);
gen_pop_update(s, ot);
if (reg == R_SS) {
/* if reg == SS, inhibit interrupts/trace. */
@ -5329,7 +5315,7 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
case 0x1a1: /* pop fs */
case 0x1a9: /* pop gs */
ot = gen_pop_T0(s);
gen_movl_seg_T0(s, (b >> 3) & 7, pc_start - s->cs_base);
gen_movl_seg_T0(s, (b >> 3) & 7);
gen_pop_update(s, ot);
if (s->is_jmp) {
gen_jmp_im(s->pc - s->cs_base);
@ -5380,7 +5366,7 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
if (reg >= 6 || reg == R_CS)
goto illegal_op;
gen_ldst_modrm(env, s, modrm, MO_16, OR_TMP0, 0);
gen_movl_seg_T0(s, reg, pc_start - s->cs_base);
gen_movl_seg_T0(s, reg);
if (reg == R_SS) {
/* if reg == SS, inhibit interrupts/trace */
/* If several instructions disable interrupts, only the
@ -5592,7 +5578,7 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
gen_add_A0_im(s, 1 << ot);
/* load the segment first to handle exceptions properly */
gen_op_ld_v(s, MO_16, cpu_T[0], cpu_A0);
gen_movl_seg_T0(s, op, pc_start - s->cs_base);
gen_movl_seg_T0(s, op);
/* then put the data */
gen_op_mov_reg_v(ot, reg, cpu_T[1]);
if (s->is_jmp) {
@ -6410,8 +6396,6 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
set_cc_op(s, CC_OP_EFLAGS);
}
} else {
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_iret_protected(cpu_env, tcg_const_i32(dflag - 1),
tcg_const_i32(s->pc - s->cs_base));
set_cc_op(s, CC_OP_EFLAGS);
@ -7060,8 +7044,6 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
if (!s->pe) {
gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
} else {
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_sysenter(cpu_env);
gen_eob(s);
}
@ -7073,8 +7055,6 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
if (!s->pe) {
gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
} else {
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_sysexit(cpu_env, tcg_const_i32(dflag - 1));
gen_eob(s);
}
@ -7091,8 +7071,6 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
if (!s->pe) {
gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
} else {
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_sysret(cpu_env, tcg_const_i32(dflag - 1));
/* condition codes are modified only in long mode */
if (s->lma) {
@ -7138,7 +7116,6 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
} else {
gen_svm_check_intercept(s, pc_start, SVM_EXIT_LDTR_WRITE);
gen_ldst_modrm(env, s, modrm, MO_16, OR_TMP0, 0);
gen_jmp_im(pc_start - s->cs_base);
tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
gen_helper_lldt(cpu_env, cpu_tmp2_i32);
}
@ -7159,7 +7136,6 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
} else {
gen_svm_check_intercept(s, pc_start, SVM_EXIT_TR_WRITE);
gen_ldst_modrm(env, s, modrm, MO_16, OR_TMP0, 0);
gen_jmp_im(pc_start - s->cs_base);
tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
gen_helper_ltr(cpu_env, cpu_tmp2_i32);
}