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Fix: Disable IBT around indirect function calls
[lttng-modules.git]
/
src
/
lttng-context-callstack-stackwalk-impl.h
diff --git
a/src/lttng-context-callstack-stackwalk-impl.h
b/src/lttng-context-callstack-stackwalk-impl.h
index e73d1156ae7c0731e7918c194982e2446688f278..5075e9850d6742f320a89e2aa412807c256fdfd0 100644
(file)
--- a/
src/lttng-context-callstack-stackwalk-impl.h
+++ b/
src/lttng-context-callstack-stackwalk-impl.h
@@
-152,6
+152,7
@@
size_t lttng_callstack_sequence_get_size(void *priv, struct lttng_kernel_probe_c
struct field_data *fdata = (struct field_data *) priv;
size_t orig_offset = offset;
int cpu = smp_processor_id();
struct field_data *fdata = (struct field_data *) priv;
size_t orig_offset = offset;
int cpu = smp_processor_id();
+ struct irq_ibt_state irq_ibt_state;
/* do not write data if no space is available */
trace = stack_trace_context(fdata, cpu);
/* do not write data if no space is available */
trace = stack_trace_context(fdata, cpu);
@@
-166,14
+167,18
@@
size_t lttng_callstack_sequence_get_size(void *priv, struct lttng_kernel_probe_c
switch (fdata->mode) {
case CALLSTACK_KERNEL:
/* do the real work and reserve space */
switch (fdata->mode) {
case CALLSTACK_KERNEL:
/* do the real work and reserve space */
+ irq_ibt_state = wrapper_irq_ibt_save();
trace->nr_entries = save_func_kernel(trace->entries,
MAX_ENTRIES, 0);
trace->nr_entries = save_func_kernel(trace->entries,
MAX_ENTRIES, 0);
+ wrapper_irq_ibt_restore(irq_ibt_state);
break;
case CALLSTACK_USER:
++per_cpu(callstack_user_nesting, cpu);
/* do the real work and reserve space */
break;
case CALLSTACK_USER:
++per_cpu(callstack_user_nesting, cpu);
/* do the real work and reserve space */
+ irq_ibt_state = wrapper_irq_ibt_save();
trace->nr_entries = save_func_user(trace->entries,
MAX_ENTRIES);
trace->nr_entries = save_func_user(trace->entries,
MAX_ENTRIES);
+ wrapper_irq_ibt_restore(irq_ibt_state);
per_cpu(callstack_user_nesting, cpu)--;
break;
default:
per_cpu(callstack_user_nesting, cpu)--;
break;
default:
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