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target/arm: Introduce helper_exception_with_syndrome 

With the helper we can use exception_target_el at runtime,
instead of default_exception_el at translate time.
While we're at it, remove the DisasContext parameter from
gen_exception, as it is no longer used.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220609202901.1177572-20-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2022-06-10 14:32:34 +01:00 committed by Peter Maydell
parent d6d7f818a9
commit eeaf596022
3 changed files with 24 additions and 5 deletions
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1
target/arm/helper.h
View File

@ -45,6 +45,7 @@ DEF_HELPER_FLAGS_2(usad8, TCG_CALL_NO_RWG_SE, i32, i32, i32)
DEF_HELPER_FLAGS_3(sel_flags, TCG_CALL_NO_RWG_SE,
i32, i32, i32, i32)
DEF_HELPER_2(exception_internal, noreturn, env, i32)
DEF_HELPER_3(exception_with_syndrome, noreturn, env, i32, i32)
DEF_HELPER_4(exception_with_syndrome_el, noreturn, env, i32, i32, i32)
DEF_HELPER_2(exception_bkpt_insn, noreturn, env, i32)
DEF_HELPER_2(exception_swstep, noreturn, env, i32)

10
target/arm/op_helper.c
View File

@ -399,6 +399,16 @@ void HELPER(exception_with_syndrome_el)(CPUARMState *env, uint32_t excp,
raise_exception(env, excp, syndrome, target_el);
}
/*
* Raise an exception with the specified syndrome register value
* to the default target el.
*/
void HELPER(exception_with_syndrome)(CPUARMState *env, uint32_t excp,
uint32_t syndrome)
{
raise_exception(env, excp, syndrome, exception_target_el(env));
}
uint32_t HELPER(cpsr_read)(CPUARMState *env)
{
return cpsr_read(env) & ~CPSR_EXEC;

18
target/arm/translate.c
View File

@ -1097,9 +1097,10 @@ static void gen_exception_el(int excp, uint32_t syndrome, uint32_t target_el)
gen_exception_el_v(excp, syndrome, tcg_constant_i32(target_el));
}
static void gen_exception(DisasContext *s, int excp, uint32_t syndrome)
static void gen_exception(int excp, uint32_t syndrome)
{
gen_exception_el(excp, syndrome, default_exception_el(s));
gen_helper_exception_with_syndrome(cpu_env, tcg_constant_i32(excp),
tcg_constant_i32(syndrome));
}
static void gen_exception_insn_el_v(DisasContext *s, uint64_t pc, int excp,
@ -1123,7 +1124,14 @@ void gen_exception_insn_el(DisasContext *s, uint64_t pc, int excp,
void gen_exception_insn(DisasContext *s, uint64_t pc, int excp, uint32_t syn)
{
gen_exception_insn_el(s, pc, excp, syn, default_exception_el(s));
if (s->aarch64) {
gen_a64_set_pc_im(pc);
} else {
gen_set_condexec(s);
gen_set_pc_im(s, pc);
}
gen_exception(excp, syn);
s->base.is_jmp = DISAS_NORETURN;
}
static void gen_exception_bkpt_insn(DisasContext *s, uint32_t syn)
@ -9766,7 +9774,7 @@ static void arm_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu)
switch (dc->base.is_jmp) {
case DISAS_SWI:
gen_ss_advance(dc);
gen_exception(dc, EXCP_SWI, syn_aa32_svc(dc->svc_imm, dc->thumb));
gen_exception(EXCP_SWI, syn_aa32_svc(dc->svc_imm, dc->thumb));
break;
case DISAS_HVC:
gen_ss_advance(dc);
@ -9835,7 +9843,7 @@ static void arm_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu)
gen_helper_yield(cpu_env);
break;
case DISAS_SWI:
gen_exception(dc, EXCP_SWI, syn_aa32_svc(dc->svc_imm, dc->thumb));
gen_exception(EXCP_SWI, syn_aa32_svc(dc->svc_imm, dc->thumb));
break;
case DISAS_HVC:
gen_exception_el(EXCP_HVC, syn_aa32_hvc(dc->svc_imm), 2);