From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [PULL 21/24] arm: Abstract out "are we singlestepping" test to utility function
Date: Thu, 20 Apr 2017 17:41:07 +0100 [thread overview]
Message-ID: <1492706470-10921-22-git-send-email-peter.maydell@linaro.org> (raw)
In-Reply-To: <1492706470-10921-1-git-send-email-peter.maydell@linaro.org>
We now test for "are we singlestepping" in several places and
it's not a trivial check because we need to care about both
architectural singlestep and QEMU gdbstub singlestep. We're
also about to add another place that needs to make this check,
so pull the condition out into a function.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 1491844419-12485-7-git-send-email-peter.maydell@linaro.org
---
target/arm/translate.c | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)
diff --git a/target/arm/translate.c b/target/arm/translate.c
index 87fd702..f28c4ca 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -309,6 +309,17 @@ static void gen_singlestep_exception(DisasContext *s)
}
}
+static inline bool is_singlestepping(DisasContext *s)
+{
+ /* Return true if we are singlestepping either because of
+ * architectural singlestep or QEMU gdbstub singlestep. This does
+ * not include the command line '-singlestep' mode which is rather
+ * misnamed as it only means "one instruction per TB" and doesn't
+ * affect the code we generate.
+ */
+ return s->singlestep_enabled || s->ss_active;
+}
+
static void gen_smul_dual(TCGv_i32 a, TCGv_i32 b)
{
TCGv_i32 tmp1 = tcg_temp_new_i32();
@@ -4104,7 +4115,7 @@ static inline void gen_goto_tb(DisasContext *s, int n, target_ulong dest)
static inline void gen_jmp (DisasContext *s, uint32_t dest)
{
- if (unlikely(s->singlestep_enabled || s->ss_active)) {
+ if (unlikely(is_singlestepping(s))) {
/* An indirect jump so that we still trigger the debug exception. */
if (s->thumb)
dest |= 1;
@@ -11970,9 +11981,8 @@ void gen_intermediate_code(CPUARMState *env, TranslationBlock *tb)
((dc->pc >= next_page_start - 3) && insn_crosses_page(env, dc));
} while (!dc->is_jmp && !tcg_op_buf_full() &&
- !cs->singlestep_enabled &&
+ !is_singlestepping(dc) &&
!singlestep &&
- !dc->ss_active &&
!end_of_page &&
num_insns < max_insns);
@@ -11989,7 +11999,7 @@ void gen_intermediate_code(CPUARMState *env, TranslationBlock *tb)
instruction was a conditional branch or trap, and the PC has
already been written. */
gen_set_condexec(dc);
- if (unlikely(cs->singlestep_enabled || dc->ss_active)) {
+ if (unlikely(is_singlestepping(dc))) {
/* Unconditional and "condition passed" instruction codepath. */
switch (dc->is_jmp) {
case DISAS_SWI:
@@ -12067,7 +12077,7 @@ void gen_intermediate_code(CPUARMState *env, TranslationBlock *tb)
/* "Condition failed" instruction codepath for the branch/trap insn */
gen_set_label(dc->condlabel);
gen_set_condexec(dc);
- if (unlikely(cs->singlestep_enabled || dc->ss_active)) {
+ if (unlikely(is_singlestepping(dc))) {
gen_set_pc_im(dc, dc->pc);
gen_singlestep_exception(dc);
} else {
--
2.7.4
next prev parent reply other threads:[~2017-04-20 16:41 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-20 16:40 [Qemu-devel] [PULL 00/24] target-arm queue Peter Maydell
2017-04-20 16:40 ` [Qemu-devel] [PULL 01/24] hw/arm/boot: take Linux/arm64 TEXT_OFFSET header field into account Peter Maydell
2017-04-20 16:40 ` [Qemu-devel] [PULL 02/24] hw/arm/exynos: Convert fprintf to qemu_log_mask/error_report Peter Maydell
2017-04-20 16:40 ` [Qemu-devel] [PULL 03/24] hw/char/exynos4210_uart: Constify static array and few arguments Peter Maydell
2017-04-20 16:40 ` [Qemu-devel] [PULL 04/24] hw/misc/exynos4210_pmu: Reorder local variables for readability Peter Maydell
2017-04-20 16:40 ` [Qemu-devel] [PULL 05/24] target/arm: Add missing entries to excnames[] for log strings Peter Maydell
2017-04-20 16:40 ` [Qemu-devel] [PULL 06/24] arm: Move excnames[] array into arm_log_exceptions() Peter Maydell
2017-04-20 16:40 ` [Qemu-devel] [PULL 07/24] target/arm: Add assertion about FSC format for syndrome registers Peter Maydell
2017-04-20 16:40 ` [Qemu-devel] [PULL 08/24] stellaris: Don't hw_error() on bad register accesses Peter Maydell
2017-04-20 16:40 ` [Qemu-devel] [PULL 09/24] arm/kvm: Remove trailing newlines from error_report() Peter Maydell
2017-04-20 16:40 ` [Qemu-devel] [PULL 10/24] hw/arm: Qomify pxa2xx.c Peter Maydell
2017-04-20 16:40 ` [Qemu-devel] [PULL 11/24] cadence_gem: Read the correct queue descriptor Peter Maydell
2017-04-20 16:40 ` [Qemu-devel] [PULL 12/24] cadence_gem: Correct the multi-queue can rx logic Peter Maydell
2017-04-20 16:40 ` [Qemu-devel] [PULL 13/24] cadence_gem: Correct the interupt logic Peter Maydell
2017-04-20 16:41 ` [Qemu-devel] [PULL 14/24] cadence_gem: Make the revision a property Peter Maydell
2017-04-20 16:41 ` [Qemu-devel] [PULL 15/24] xlnx-zynqmp: Set the Cadence GEM revision Peter Maydell
2017-04-20 16:41 ` [Qemu-devel] [PULL 16/24] arm: Don't implement BXJ on M-profile CPUs Peter Maydell
2017-04-20 16:41 ` [Qemu-devel] [PULL 17/24] arm: Thumb shift operations should not permit interworking branches Peter Maydell
2017-04-20 16:41 ` [Qemu-devel] [PULL 18/24] arm: Factor out "generate right kind of step exception" Peter Maydell
2017-04-20 16:41 ` [Qemu-devel] [PULL 19/24] arm: Move gen_set_condexec() and gen_set_pc_im() up in the file Peter Maydell
2017-04-20 16:41 ` [Qemu-devel] [PULL 20/24] arm: Move condition-failed codepath generation out of if() Peter Maydell
2017-04-20 16:41 ` Peter Maydell [this message]
2017-04-20 16:41 ` [Qemu-devel] [PULL 22/24] arm: Track M profile handler mode state in TB flags Peter Maydell
2017-04-20 16:41 ` [Qemu-devel] [PULL 23/24] arm: Implement M profile exception return properly Peter Maydell
2017-04-20 16:41 ` [Qemu-devel] [PULL 24/24] arm: Remove workarounds for old M-profile exception return implementation Peter Maydell
2017-04-20 17:30 ` [Qemu-devel] [PULL 00/24] target-arm queue Peter Maydell
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