efDataPreprocessing postProcessingDataMemory.c 岳彩东 commit at 2020-11-23

efDataPreprocessing/dataSharedMemory/postProcessingDataMemory.c

@@ -147,3 +147,71 @@ static const struct unwind_idx *search_index(unsigned long addr,
 			start = mid;
 		}
 	}
+
+	if (likely(start->addr_offset <= addr_prel31))
+		return start;
+	else {
+		pr_warning("unwind: Unknown symbol address %08lx\n", addr);
+		return NULL;
+	}
+}
+
+static const struct unwind_idx *unwind_find_origin(
+		const struct unwind_idx *start, const struct unwind_idx *stop)
+{
+	pr_debug("%s(%p, %p)\n", __func__, start, stop);
+	while (start < stop) {
+		const struct unwind_idx *mid = start + ((stop - start) >> 1);
+
+		if (mid->addr_offset >= 0x40000000)
+			/* negative offset */
+			start = mid + 1;
+		else
+			/* positive offset */
+			stop = mid;
+	}
+	pr_debug("%s -> %p\n", __func__, stop);
+	return stop;
+}
+
+static const struct unwind_idx *unwind_find_idx(unsigned long addr)
+{
+	const struct unwind_idx *idx = NULL;
+	unsigned long flags;
+
+	pr_debug("%s(%08lx)\n", __func__, addr);
+
+	if (core_kernel_text(addr)) {
+		if (unlikely(!__origin_unwind_idx))
+			__origin_unwind_idx =
+				unwind_find_origin(__start_unwind_idx,
+						__stop_unwind_idx);
+
+		/* main unwind table */
+		idx = search_index(addr, __start_unwind_idx,
+				   __origin_unwind_idx,
+				   __stop_unwind_idx);
+	} else {
+		/* module unwind tables */
+		struct unwind_table *table;
+
+		spin_lock_irqsave(&unwind_lock, flags);
+		list_for_each_entry(table, &unwind_tables, list) {
+			if (addr >= table->begin_addr &&
+			    addr < table->end_addr) {
+				idx = search_index(addr, table->start,
+						   table->origin,
+						   table->stop);
+				/* Move-to-front to exploit common traces */
+				list_move(&table->list, &unwind_tables);
+				break;
+			}
+		}
+		spin_unlock_irqrestore(&unwind_lock, flags);
+	}
+
+	pr_debug("%s: idx = %p\n", __func__, idx);
+	return idx;
+}
+
+static unsigned long unwind_get_byte(struct unwind_ctrl_block *ctrl)