Subject:      xgcc patch
From:         carlk@gte.net (Carl Kreider)
Date:         1997/12/19
Message-ID:   <67cioh$ff6$1@gte2.gte.net>
Newsgroups:   comp.os.os9
[More Headers]

I have solved the parameter passing problem with Walter Hunt's
OS9 cross compiler from rtsi.  I'm not clever; I cribbed the
solution from Stephan Paschedag's OS9 port sources.  A couple
problems remain, but my application is up and running compiled
on my linux box.

Since this problem has been discussed here, I thought I would
post the diffs for others who may be interested.

--- m68k.h.old  Sun Dec 14 13:34:12 1997
+++ m68k.h      Sun Dec 14 14:01:25 1997
@@ -866,18 +866,29 @@
    It exists only to test register calling conventions.  */

 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
-((TARGET_REGPARM && (CUM) < 8) ? gen_rtx (REG, (MODE), (CUM) / 4) : 0)
+(((TARGET_REGPARM) &&                                  \
+  (!(TYPE) || (TREE_CODE ((TYPE)) != RECORD_TYPE &&    \
+               TREE_CODE ((TYPE)) != UNION_TYPE)))     \
+ ? (8 < (CUM) + ((((MODE) == BLKmode                   \
+                   ? int_size_in_bytes (TYPE)          \
+                   : GET_MODE_SIZE (MODE)) + 3) & ~3)  \
+   ? 0                                                 \
+   : gen_rtx (REG, (MODE), (CUM)/4))                   \
+ : 0)
+
+/*((TARGET_REGPARM && (CUM) < 8) ? gen_rtx (REG, (MODE), (CUM) / 4) : 0)*/

 /* For an arg passed partly in registers and partly in memory,
    this is the number of registers used.
    For args passed entirely in registers or entirely in memory, zero.  */

 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
-((TARGET_REGPARM && (CUM) < 8                                  \
+       0
+/*((TARGET_REGPARM && (CUM) < 8                                        \
   && 8 < ((CUM) + ((MODE) == BLKmode                           \
                      ? int_size_in_bytes (TYPE)                \
                      : GET_MODE_SIZE (MODE))))                 \
- ? 2 - (CUM) / 4 : 0)
+ ? 2 - (CUM) / 4 : 0) */

 /* Generate the assembly code for function entry. */
 #define FUNCTION_PROLOGUE(FILE, SIZE) output_function_prologue(FILE, SIZE)

--
Carl Kreider
 aka
  ckreider@acm.org ckreider@gte.net carlk@syscon-intl.com