diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | csu/gmon-start.c | 16 | ||||
| -rw-r--r-- | csu/initfini.c | 11 |
3 files changed, 28 insertions, 4 deletions
@@ -1,5 +1,10 @@ Tue Jan 16 17:37:39 1996 Roland McGrath <roland@churchy.gnu.ai.mit.edu> + * 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. + * gmon/Makefile (CFLAGS-mcount.c): New variable. (mcount.po): New target. diff --git a/csu/gmon-start.c b/csu/gmon-start.c index c9d51b113b..2ebbbf1704 100644 --- a/csu/gmon-start.c +++ b/csu/gmon-start.c @@ -1,5 +1,5 @@ /* Code to enable profiling at program startup. -Copyright (C) 1995 Free Software Foundation, Inc. +Copyright (C) 1995, 1996 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -30,12 +30,20 @@ extern void _start (), etext (); extern void monstartup (u_long, u_long); extern void _mcleanup (void); +#ifndef HAVE_INITFINI /* This function gets called at startup by the normal constructor mechanism. We link this file together with start.o to produce gcrt1.o, so this constructor will be first in the list. */ -static void gmon_start (void) __attribute__ ((constructor)); -static void -gmon_start (void) + +void __gmon_start__ (void) __attribute__ ((constructor)); +#else +/* In ELF and COFF, we cannot use the normal constructor mechanism to call + __gmon_start__ because gcrt1.o appears before crtbegin.o in the link. + Instead crti.o calls it specially (see initfini.c). */ +#endif + +void +__gmon_start__ (void) { /* Start keeping profiling records. */ monstartup ((u_long) &_start, (u_long) &etext); 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. */ |