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arm: Factor out "generate right kind of step exception"

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We currently have two places that do:
if (dc->ss_active) {
gen_step_complete_exception(dc);
} else {
gen_exception_internal(EXCP_DEBUG);
}

Factor this out into its own function, as we're about to add
a third place that needs the same logic.

Backports commit 5425415ebba5fa20558e1ef25e1997a6f5ea4c7c from qemu
This commit is contained in:
Peter Maydell 2018-03-02 14:43:42 -05:00 committed by Lioncash
parent ddfe550411
commit 23141d7620
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 16 additions and 12 deletions
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28
qemu/target/arm/translate.c
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@ -290,6 +290,19 @@ static void gen_step_complete_exception(DisasContext *s)
s->is_jmp = DISAS_EXC;
}
static void gen_singlestep_exception(DisasContext *s)
{
/* Generate the right kind of exception for singlestep, which is
* either the architectural singlestep or EXCP_DEBUG for QEMU's
* gdb singlestepping.
*/
if (s->ss_active) {
gen_step_complete_exception(s);
} else {
gen_exception_internal(s, EXCP_DEBUG);
}
}
static void gen_smul_dual(DisasContext *s, TCGv_i32 a, TCGv_i32 b)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
@ -12222,24 +12235,15 @@ tb_end:
gen_set_pc_im(dc, dc->pc);
/* fall through */
default:
if (dc->ss_active) {
gen_step_complete_exception(dc);
} else {
/* FIXME: Single stepping a WFI insn will not halt
the CPU. */
gen_exception_internal(dc, EXCP_DEBUG);
}
/* FIXME: Single stepping a WFI insn will not halt the CPU. */
gen_singlestep_exception(dc);
}
if (dc->condjmp) {
/* "Condition failed" instruction codepath. */
gen_set_label(tcg_ctx, dc->condlabel);
gen_set_condexec(dc);
gen_set_pc_im(dc, dc->pc);
if (dc->ss_active) {
gen_step_complete_exception(dc);
} else {
gen_exception_internal(dc, EXCP_DEBUG);
}
gen_singlestep_exception(dc);
}
} else {
/* While branches must always occur at the end of an IT block,