1 files changed, 36 insertions, 0 deletions
diff --git a/tools/perf/arch/s390/util/machine.c b/tools/perf/arch/s390/util/machine.c
new file mode 100644
index 000000000..7219ecdb8
--- /dev/null
+++ b/tools/perf/arch/s390/util/machine.c
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <internal/lib.h> // page_size
+#include "machine.h"
+#include "api/fs/fs.h"
+#include "debug.h"
+#include "symbol.h"
+
+int arch__fix_module_text_start(u64 *start, u64 *size, const char *name)
+{
+	u64 m_start = *start;
+	char path[PATH_MAX];
+
+	snprintf(path, PATH_MAX, "module/%.*s/sections/.text",
+				(int)strlen(name) - 2, name + 1);
+	if (sysfs__read_ull(path, (unsigned long long *)start) < 0) {
+		pr_debug2("Using module %s start:%#lx\n", path, m_start);
+		*start = m_start;
+	} else {
+		/* Successful read of the modules segment text start address.
+		 * Calculate difference between module start address
+		 * in memory and module text segment start address.
+		 * For example module load address is 0x3ff8011b000
+		 * (from /proc/modules) and module text segment start
+		 * address is 0x3ff8011b870 (from file above).
+		 *
+		 * Adjust the module size and subtract the GOT table
+		 * size located at the beginning of the module.
+		 */
+		*size -= (*start - m_start);
+	}
+
+	return 0;
+}