gcc/

	Backport from trunk r244828.
	2017-01-23  Andreas Tobler  <andreast@gcc.gnu.org>

	* config/aarch64/aarch64.c (aarch64_elf_asm_constructor): Increase
	size of buf.
	(aarch64_elf_asm_destructor): Likewise.

Change-Id: I22482fe29e558254616a97aeddd6b39c48718a85

diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index c2bf18c..354207d 100644 (file)
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -5464,7 +5464,10 @@ aarch64_elf_asm_constructor (rtx symbol, int priority)
   else
     {
       section *s;
-      char buf[18];
+      /* While priority is known to be in range [0, 65535], so 18 bytes
+         would be enough, the compiler might not know that.  To avoid
+         -Wformat-truncation false positive, use a larger size.  */
+      char buf[23];
       snprintf (buf, sizeof (buf), ".init_array.%.5u", priority);
       s = get_section (buf, SECTION_WRITE, NULL);
       switch_to_section (s);
@@ -5481,7 +5484,10 @@ aarch64_elf_asm_destructor (rtx symbol, int priority)
   else
     {
       section *s;
-      char buf[18];
+      /* While priority is known to be in range [0, 65535], so 18 bytes
+         would be enough, the compiler might not know that.  To avoid
+         -Wformat-truncation false positive, use a larger size.  */
+      char buf[23];
       snprintf (buf, sizeof (buf), ".fini_array.%.5u", priority);
       s = get_section (buf, SECTION_WRITE, NULL);
       switch_to_section (s);