Reviewed-by: Pierrick Bouvier <pierrick.bouv...@linaro.org>
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
linux-user/aarch64/cpu_loop.c | 3 +++
linux-user/aarch64/signal.c | 34 +++++++++++++++++++++++++++++++++-
2 files changed, 36 insertions(+), 1 deletion(-)
diff --git a/linux-user/aarch64/cpu_loop.c b/linux-user/aarch64/cpu_loop.c
index 098578978e..7e9788abfb 100644
--- a/linux-user/aarch64/cpu_loop.c
+++ b/linux-user/aarch64/cpu_loop.c
@@ -33,6 +33,9 @@ static void signal_for_exception(CPUARMState *env, vaddr addr)
uint32_t syn = env->exception.syndrome;
int si_code, si_signo;
+ /* Let signal delivery see that ESR is live. */
+ env->cp15.esr_el[1] = syn;
+
switch (syn_get_ec(syn)) {
case EC_DATAABORT:
case EC_INSNABORT:
diff --git a/linux-user/aarch64/signal.c b/linux-user/aarch64/signal.c
index 668353bbda..ef97be3ac7 100644
--- a/linux-user/aarch64/signal.c
+++ b/linux-user/aarch64/signal.c
@@ -65,6 +65,13 @@ struct target_fpsimd_context {
uint64_t vregs[32 * 2]; /* really uint128_t vregs[32] */
};
+#define TARGET_ESR_MAGIC 0x45535201
+
+struct target_esr_context {
+ struct target_aarch64_ctx head;
+ uint64_t esr;
+};
+
#define TARGET_EXTRA_MAGIC 0x45585401
struct target_extra_context {
@@ -201,6 +208,14 @@ static void target_setup_fpsimd_record(struct
target_fpsimd_context *fpsimd,
}
}
+static void target_setup_esr_record(struct target_esr_context *ctx,
+ CPUARMState *env)
+{
+ __put_user(TARGET_ESR_MAGIC, &ctx->head.magic);
+ __put_user(sizeof(*ctx), &ctx->head.size);
+ __put_user(env->cp15.esr_el[1], &ctx->esr);
+}
+
static void target_setup_extra_record(struct target_extra_context *extra,
uint64_t datap, uint32_t extra_size)
{
@@ -531,6 +546,9 @@ static int target_restore_sigframe(CPUARMState *env,
fpsimd = (struct target_fpsimd_context *)ctx;
break;
+ case TARGET_ESR_MAGIC:
+ break; /* ignore */
+
case TARGET_SVE_MAGIC:
if (sve || size < sizeof(struct target_sve_context)) {
goto err;
@@ -683,7 +701,7 @@ static void target_setup_frame(int usig, struct
target_sigaction *ka,
uc.tuc_mcontext.__reserved),
};
int fpsimd_ofs, fr_ofs, sve_ofs = 0, za_ofs = 0, tpidr2_ofs = 0;
- int zt_ofs = 0;
+ int zt_ofs = 0, esr_ofs = 0;
int sve_size = 0, za_size = 0, tpidr2_size = 0, zt_size = 0;
struct target_rt_sigframe *frame;
struct target_rt_frame_record *fr;
@@ -693,6 +711,15 @@ static void target_setup_frame(int usig, struct
target_sigaction *ka,
fpsimd_ofs = alloc_sigframe_space(sizeof(struct target_fpsimd_context),
&layout);
+ /*
+ * In user mode, ESR_EL1 is only set by cpu_loop while queueing the
+ * signal, and it's only valid for the one sync insn.
+ */
+ if (env->cp15.esr_el[1]) {
+ esr_ofs = alloc_sigframe_space(sizeof(struct target_esr_context),
+ &layout);
+ }
+
/* SVE state needs saving only if it exists. */
if (cpu_isar_feature(aa64_sve, env_archcpu(env)) ||
cpu_isar_feature(aa64_sme, env_archcpu(env))) {
@@ -754,6 +781,11 @@ static void target_setup_frame(int usig, struct
target_sigaction *ka,
target_setup_general_frame(frame, env, set);
target_setup_fpsimd_record((void *)frame + fpsimd_ofs, env);
+ if (esr_ofs) {
+ target_setup_esr_record((void *)frame + esr_ofs, env);
+ /* Leave ESR_EL1 clear while it's not relevant. */
+ env->cp15.esr_el[1] = 0;
+ }
target_setup_end_record((void *)frame + layout.std_end_ofs);
if (layout.extra_ofs) {
target_setup_extra_record((void *)frame + layout.extra_ofs,
--
2.43.0
