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authorRoland McGrath <roland@gnu.org>1996-01-17 02:29:57 +0000
committerRoland McGrath <roland@gnu.org>1996-01-17 02:29:57 +0000
commit5f3d5c2bbb4757e9cc5b30bc66b1d7555739bc4a (patch)
tree57d9fa3f28869526d8a1482982bc01cefdacbcb6 /csu/initfini.c
parentd99d7e264430e26e9070b4908a6e81103aa92747 (diff)
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* csu/initfini.c (_init): Call __gmon_start__ if defined (weak ref).
	* csu/gmon-start.c (__gmon_start__): Renamed from gmon_start, made
	global.
	[! HAVE_INITFINI]: Only make it a constructor in this case.
Diffstat (limited to 'csu/initfini.c')
-rw-r--r--csu/initfini.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/csu/initfini.c b/csu/initfini.c
index b0d0e68cbd..a3c3b3b7bc 100644
--- a/csu/initfini.c
+++ b/csu/initfini.c
@@ -63,6 +63,17 @@ SECTION (".init")
 void
 _init (void)
 {
+  /* We cannot use the normal constructor mechanism in gcrt1.o because it
+     appears before crtbegin.o in the link, so the header elt of .ctors
+     would come after the elt for __gmon_start__.  One approach is for
+     gcrt1.o to reference a symbol which would be defined by some library
+     module which has a constructor; but then user code's constructors
+     would come first, and not be profiled.  */
+  extern void __gmon_start__ (void) __attribute__ ((weak));
+  weak_symbol (__gmon_start__)
+  if (&__gmon_start__)
+    __gmon_start__ ();
+
   /* End the here document containing the .init prologue code.
      Then fetch the .section directive just written and append that
      to crtn.s-new, followed by the function epilogue.  */