PC-relative Processing

[Alan Modra]

On Mon, Jun 25, 2001 at 01:57:33PM -0700, Tracy Kuhrt wrote:
> 
> In that case, I would like to suggest the following patch to 2.11 sources:
> 2001-06-25  Tracy A. Kuhrt  <Tracy.Kuhrt@microchip.com>
>     * gas/write.c:  Add call to MD_PCREL_FROM_SECTION before disabling PC-relative processing.
>     This will allow the target machine to specify the location from which a PC relative jump containing
> a
>     subtraction expression should be calculated.

OK, but we'll put in mainline for at least a week or two to discover
what breaks before migrating to 2.11.

/grumble  Your ChangeLog entry isn't correct.  Format for an 80 column
display, filename relative to ChangeLog file, and include function name.
Also, the adjustment should only be done if pcrel.
/nogrumble

I'm committing the following.

gas/ChangeLog
2001-06-27  Tracy A. Kuhrt  <Tracy.Kuhrt@microchip.com>

	* write.c (fixup_segment <Difference of 2 syms same seg>): If
	pcrel, subtract MD_PCREL_FROM_SECTION value.

-- 
Alan Modra

Index: write.c
===================================================================
RCS file: /cvs/src/src/gas/write.c,v
retrieving revision 1.37
diff -u -p -r1.37 write.c
--- write.c	2001/05/27 12:17:38	1.37
+++ write.c	2001/06/27 03:04:24
@@ -2661,8 +2661,10 @@ fixup_segment (fixP, this_segment_type)
 		as_bad_where (fixP->fx_file, fixP->fx_line,
 			      _("callj to difference of 2 symbols"));
 #endif /* TC_I960  */
-	      add_number += S_GET_VALUE (add_symbolP) -
-		S_GET_VALUE (sub_symbolP);
+	      add_number += (S_GET_VALUE (add_symbolP)
+			     - S_GET_VALUE (sub_symbolP));
+	      if (pcrel)
+		add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type);
 
 	      add_symbolP = NULL;
 	      pcrel = 0;	/* No further pcrel processing.  */