[ppc patch] setjmp/longjmp

[Hollis Blanchard <hollis@penguinppc.org>]

I've implemented setjmp and longjmp for PowerPC. Annoyingly, because PPC
still has no module support, files are compiled with -DGRUB_UTIL=1, and
that causes include/grub/setjmp.h to redefine both functions. I guess
that means we used to link in the libc setjmp/longjmp (which then failed
miserably when one tried to run them).

Anyways, I have done some standalone tests and it seems to work fine. So
pretending the GRUB_UTIL stuff is fixed, this wouldn't break the
build...

-Hollis

2004-11-15  Hollis Blanchard  <hollis@penguinppc.org>

  * kern/powerpc/ieee1275/init.c (grub_setjmp): Remove function.
  (grub_longjmp): Likewise.
  * include/grub/powerpc/setjmp.h (grub_jmp_buf): Set array size to 20.
  * normal/powerpc/setjmp.S (grub_setjmp): New function.
  (grub_longjmp): Likewise.

Index: kern/powerpc/ieee1275/init.c
===================================================================
RCS file: /cvsroot/grub/grub2/kern/powerpc/ieee1275/init.c,v
retrieving revision 1.7
diff -u -p -r1.7 init.c
--- kern/powerpc/ieee1275/init.c	15 Oct 2004 02:29:11 -0000	1.7
+++ kern/powerpc/ieee1275/init.c	16 Nov 2004 04:53:32 -0000
@@ -111,15 +111,3 @@ grub_get_rtc (void)
 {
   return 0;
 }
-
-int
-grub_setjmp (grub_jmp_buf env __attribute ((unused)))
-{
-  return 0;
-}
-
-void
-grub_longjmp (grub_jmp_buf env __attribute ((unused)),
-	      int val __attribute ((unused)))
-{
-}
Index: include/grub/powerpc/setjmp.h
===================================================================
RCS file: /cvsroot/grub/grub2/include/grub/powerpc/setjmp.h,v
retrieving revision 1.2
diff -u -p -r1.2 setjmp.h
--- include/grub/powerpc/setjmp.h	4 Apr 2004 13:46:01 -0000	1.2
+++ include/grub/powerpc/setjmp.h	16 Nov 2004 04:53:32 -0000
@@ -20,6 +20,6 @@
 #ifndef GRUB_SETJMP_CPU_HEADER
 #define GRUB_SETJMP_CPU_HEADER	1
 
-typedef unsigned long grub_jmp_buf[6];
+typedef unsigned long grub_jmp_buf[20];
 
 #endif /* ! GRUB_SETJMP_CPU_HEADER */
Index: normal/powerpc/setjmp.S
===================================================================
RCS file: normal/powerpc/setjmp.S
diff -N normal/powerpc/setjmp.S
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ normal/powerpc/setjmp.S	16 Nov 2004 04:53:32 -0000
@@ -0,0 +1,85 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2004  Free Software Foundation, Inc.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <grub/symbol.h>
+
+	.file	"setjmp.S"
+
+	.text
+
+/*
+ * int grub_setjmp (grub_jmp_buf env)
+ */
+FUNCTION(grub_setjmp)
+	stw	1, 0(3)
+	stw	14, 4(3)
+	stw	15, 8(3)
+	stw	16, 12(3)
+	stw	17, 16(3)
+	stw	18, 20(3)
+	stw	19, 24(3)
+	stw	20, 28(3)
+	stw	21, 32(3)
+	stw	22, 36(3)
+	stw	23, 40(3)
+	stw	24, 44(3)
+	stw	25, 48(3)
+	stw	26, 52(3)
+	stw	27, 56(3)
+	stw	28, 60(3)
+	stw	29, 64(3)
+	stw	30, 68(3)
+	mflr	4
+	stw	4, 72(3)
+	mfcr	4
+	stw	4, 76(3)
+	li	3, 0
+	blr
+
+/*
+ * int grub_longjmp (grub_jmp_buf env, int val)
+ */
+FUNCTION(grub_longjmp)
+	lwz	1, 0(3)
+	lwz	14, 4(3)
+	lwz	15, 8(3)
+	lwz	16, 12(3)
+	lwz	17, 16(3)
+	lwz	18, 20(3)
+	lwz	19, 24(3)
+	lwz	20, 28(3)
+	lwz	21, 32(3)
+	lwz	22, 36(3)
+	lwz	23, 40(3)
+	lwz	24, 44(3)
+	lwz	25, 48(3)
+	lwz	26, 52(3)
+	lwz	27, 56(3)
+	lwz	28, 60(3)
+	lwz	29, 64(3)
+	lwz	30, 68(3)
+	lwz	5, 72(3)
+	mtlr	5
+	lwz	5, 76(3)
+	mtcr	5
+	mr.	3, 4
+	bne	1f
+	li	3, 1
+1:	blr
+
Index: conf/powerpc-ieee1275.rmk
===================================================================
RCS file: /cvsroot/grub/grub2/conf/powerpc-ieee1275.rmk,v
retrieving revision 1.13
diff -u -p -r1.13 powerpc-ieee1275.rmk
--- conf/powerpc-ieee1275.rmk	3 Nov 2004 03:21:14 -0000	1.13
+++ conf/powerpc-ieee1275.rmk	16 Nov 2004 04:58:32 -0000
@@ -41,6 +41,7 @@ grubof_SOURCES = boot/powerpc/ieee1275/c
 	kern/powerpc/ieee1275/init.c term/powerpc/ieee1275/ofconsole.c \
 	kern/powerpc/ieee1275/openfw.c fs/ext2.c fs/ufs.c fs/minix.c fs/hfs.c \
 	fs/jfs.c normal/cmdline.c normal/command.c normal/main.c normal/menu.c \
+	normal/powerpc/setjmp.S \
 	disk/powerpc/ieee1275/ofdisk.c disk/powerpc/ieee1275/partition.c \
 	kern/env.c normal/arg.c loader/powerpc/ieee1275/linux.c \
 	loader/powerpc/ieee1275/linux_normal.c commands/boot.c