[PATCH] ppc64 gmon-start change

[Steve Munroe]

For PowerPC64 we use the address of ._start as the lowest address for which
we need to keep profiling records.  We can't copy the ia64 scheme as our 
entry poiny address is really the address of the function descriptor, not 
the actual function entry. 

The prerequisite for this patch is "[PATCH] add PowerPC64 specific code"
which includes the new file ./sysdeps/powerpc/powerpc64/elf/entry.h. 
This file defines ENTRY_POINT, ENTRY_POINT_DECL, and TEXT_START so that
gmon-start.c can obtain the address of ._start.
   
2002-09-10  Alan Modra <amodra@bigpond.net.au>
	
	* csu/gmon-start.c [!TEXT_START]: Define TEXT_START if not already
	defined in entry.h.  
	(__gmon_start__) [!ENTRY_POINT_DECL]: Use TEXT_START macro to obtain
	lowest address for profiling in  __monstartup call.

diff -rc2PN libc23-cvstip-20020906/csu/gmon-start.c libc23/csu/gmon-start.c
*** libc23-cvstip-20020906/csu/gmon-start.c	Wed Feb 13 03:16:58 2002
--- libc23/csu/gmon-start.c	Fri Sep  6 15:19:48 2002
***************
*** 36,39 ****
--- 36,47 ----
  extern void etext;
  
+ #ifndef TEXT_START
+ #ifdef ENTRY_POINT_DECL
+ #define TEXT_START ENTRY_POINT
+ #else
+ #define TEXT_START &ENTRY_POINT
+ #endif
+ #endif
+ 
  #ifndef HAVE_INITFINI
  /* This function gets called at startup by the normal constructor
***************
*** 67,71 ****
    __monstartup ((u_long) ENTRY_POINT, (u_long) &etext);
  #else
!   __monstartup ((u_long) &ENTRY_POINT, (u_long) &etext);
  #endif
  
--- 75,79 ----
    __monstartup ((u_long) ENTRY_POINT, (u_long) &etext);
  #else
!   __monstartup ((u_long) TEXT_START, (u_long) &etext);
  #endif