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target/xtensa: extract test for syscall instruction 

- mark syscall instruction;
- put syscall exception check right after privileged exception check;

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2018-08-27 22:18:48 -07:00
parent 21a2dad5c4
commit 4c6ec5f3cd
1 changed files with 6 additions and 7 deletions
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13
target/xtensa/translate.c
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@ -1047,6 +1047,11 @@ static void disas_xtensa_insn(CPUXtensaState *env, DisasContext *dc)
return;
}
if (op_flags & XTENSA_OP_SYSCALL) {
gen_exception_cause(dc, SYSCALL_CAUSE);
return;
}
for (slot = 0; slot < slots; ++slot) {
XtensaOpcodeOps *ops = slot_prop[slot].ops;
@ -2557,12 +2562,6 @@ static void translate_subx(DisasContext *dc, const uint32_t arg[],
}
}
static void translate_syscall(DisasContext *dc, const uint32_t arg[],
const uint32_t par[])
{
gen_exception_cause(dc, SYSCALL_CAUSE);
}
static void translate_waiti(DisasContext *dc, const uint32_t arg[],
const uint32_t par[])
{
@ -4094,7 +4093,7 @@ static const XtensaOpcodeOps core_ops[] = {
.par = (const uint32_t[]){3},
}, {
.name = "syscall",
.translate = translate_syscall,
.op_flags = XTENSA_OP_SYSCALL,
}, {
.name = "umul.aa.hh",
.translate = translate_mac16,