* cris/crt0.S: Use jump, not ba, to skip the interrupt table. Use

"setf", not "nop", for common_v10_v32 compatibility. Move out interrupt table to irqtable.S. Include here for non-ELF. * cris/irqtable.S: Extracted from cris/crt0.S. Provide per-entry weak default stub definitions. * cris/crtn.c: Use "setf", not "nop", for common_v10_v32 compatibility. * cris/setup.S [__arch_common_v10_v32]: Return. * cris/Makefile.in (BSP_OBJS): Add irqtable.o.
2007-02-21 14:08:26 +00:00 · 2007-02-21 14:08:26 +00:00 · 0bb4152b76
parent 547c5c6104
commit 0bb4152b76
6 changed files with 124 additions and 24 deletions
--- a/libgloss/ChangeLog
+++ b/libgloss/ChangeLog
@ -1,3 +1,15 @@
+2007-02-21  Hans-Peter Nilsson  <hp@axis.com>
+
+	* cris/crt0.S: Use jump, not ba, to skip the interrupt table.  Use
+	"setf", not "nop", for common_v10_v32 compatibility.
+	Move out interrupt table to irqtable.S.  Include here for non-ELF.
+	* cris/irqtable.S: Extracted from cris/crt0.S.  Provide per-entry
+	weak default stub definitions.
+	* cris/crtn.c: Use "setf", not "nop", for common_v10_v32
+	compatibility.
+	* cris/setup.S [__arch_common_v10_v32]: Return.
+	* cris/Makefile.in (BSP_OBJS): Add irqtable.o.
+
 2007-02-15  Nick Clifton  <nickc@redhat.com>

 	* sparc/cygmon.ld.src: Link .rodata.* input sections into .text
--- a/libgloss/cris/Makefile.in
+++ b/libgloss/cris/Makefile.in
@ -86,7 +86,7 @@ BSP_PREFIX	=
 BSP_LDFLAGS	=
 BSP_BSP		= libbsp.a
 BSP_CRT0	= crt0.o
-BSP_OBJS	= ${OBJS} setup.o
+BSP_OBJS	= ${OBJS} setup.o irqtable.o
 BSP_SCRIPTS	=
 BSP_TEST	=
 BSP_INSTALL	= install-bsp
@ -273,5 +273,6 @@ wait.o: wait.c linunistd.h $(objdir)/../libnosys/config.h $(srcdir)/../libnosys/
 write.o: write.c linunistd.h $(objdir)/../libnosys/config.h $(srcdir)/../libnosys/warning.h
 lcrt0.o: lcrt0.c linunistd.h $(objdir)/../libnosys/config.h $(srcdir)/../libnosys/warning.h
 setup.o: setup.S
+irqtable.o: irqtable.S
 crti.o: crti.c
 crtn.o: crtn.c
--- a/libgloss/cris/crt0.S
+++ b/libgloss/cris/crt0.S
@ -1,5 +1,5 @@
 /* Generic simplistic start-up-stub for CRIS/CRISv32.
-   Copyright (C) 1993-2005 Axis Communications.
+   Copyright (C) 1993-2005, 2007 Axis Communications.
   All rights reserved.

   Redistribution and use in source and binary forms, with or without
@ -42,25 +42,27 @@
 .global __start
 nop
 __start:
- ba 0f
- nop
+ move.d 0f,$r9
+ jump $r9
+ setf

- .rept 256 - 2
- .dword _.int
- .endr
+#ifndef __ELF__
+
+; For a.out, everything read-only and code-wise goes into a
+; single section, so we can't separate the interrupt table from
+; the startup code if we want to have files in-between.
+#define IN_CRT0
+#include "irqtable.S"

-_.int:
-#ifdef __arch_common_v10_v32
- ; This is just to allow the multilib to compile without
- ; hackery: the "common" subset doesn't recognize
- ; interrupt-return insns.
-#elif __CRIS_arch_version >= 32
- rete
- rfe
 #else
- reti
- nop
-#endif
+
+; The interrupt table (at offset 12, irq #3) is expected here.
+; The simplest way to make sure we link it in, is to sacrifice
+; some memory and refer to it with a relocation.
+ .text
+ .dword __irqtable_at_irq3
+
+#endif /* __ELF__ */

 0:
 move.d __setup,$r9
--- a/libgloss/cris/crtn.c
+++ b/libgloss/cris/crtn.c
@ -1,5 +1,5 @@
 /* Executable and DSO init/fini end for cris*-axis-linux-gnu and simulators
-   Copyright (C) 2000, 2001, 2004, 2005 Axis Communications.
+   Copyright (C) 2000, 2001, 2004, 2005, 2007 Axis Communications.
   All rights reserved.

   Redistribution and use in source and binary forms, with or without
@ -36,7 +36,7 @@ __asm__ (".section .init\n"
 #endif
         "\tmove.d [sp+],r9\n"
         "\tjump r9\n"
-         "\tnop\n"
+         "\tsetf\n"

         "\t.section .fini\n"
 #ifdef __PIC__
@ -44,7 +44,7 @@ __asm__ (".section .init\n"
 #endif
         "\tmove.d [sp+],r9\n"
         "\tjump r9\n"
-         "\tnop\n");
+         "\tsetf\n");

 #else
 extern int Dummy;
--- a/libgloss/cris/irqtable.S
+++ b/libgloss/cris/irqtable.S
@ -0,0 +1,82 @@
+/* Default interrupt table for CRIS/CRISv32.
+   Copyright (C) 2007 Axis Communications.
+   All rights reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   1. Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+   2. Neither the name of Axis Communications nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY AXIS COMMUNICATIONS AND ITS CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AXIS
+   COMMUNICATIONS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+   IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+   POSSIBILITY OF SUCH DAMAGE.  */
+
+#ifdef __ELF__
+ .section .startup,"ax"
+#else
+ .text
+#endif
+
+#if defined (__ELF__) || defined (IN_CRT0)
+; This is included from crt0.S for a.out, as we can't have it as
+; a separate object file in a library due to the lack of named
+; section support and the required placement at address 3*4.
+
+; We define an interrupt table with references to the symbols
+; _.irq_XX where XX are hex numbers 3..ff (lower-case).  They
+; are satisfied by weak aliases to the _.irq stub function in
+; this file.  When overridden, the overriding function must be
+; in code explicitly linked in, i.e. *not* in a library.
+
+ .global __irqtable_at_irq3
+__irqtable_at_irq3:
+
+ .irpc irqno,3456789abcdef
+ .weak _.irq_0\irqno
+ .set _.irq_0\irqno,_.irq
+ .dword _.irq_0\irqno
+ .endr
+
+ .irpc irqhd,123456789abcdef
+ .irpc irqld,0123456789abcdef
+ .weak _.irq_\irqhd\irqld
+ .set _.irq_\irqhd\irqld,_.irq
+ .dword _.irq_\irqhd\irqld
+ .endr
+ .endr
+
+; No use having a separate file with default _.irq_[0-f][0-f]
+; definitions; just provide a single stub with a weak definition
+; and make it up to the user to provide a strong definition that
+; they force to be linked in (i.e. not in a library or at least
+; together with another symbol they know is linked in).
+ .text
+
+_.irq:
+#ifdef __arch_common_v10_v32
+ ; This is just to allow the multilib to compile without
+ ; hackery: the "common" subset doesn't recognize
+ ; interrupt-return insns.
+#elif __CRIS_arch_version >= 32
+ rete
+ rfe
+#else
+ reti
+ nop
+#endif
+#endif /* __ELF__ || IN_CRT0 */
--- a/libgloss/cris/setup.S
+++ b/libgloss/cris/setup.S
@ -1,5 +1,5 @@
 /* Support for standalone CRIS/CRISv32 code.
-   Copyright (C) 2005 Axis Communications.
+   Copyright (C) 2005, 2007 Axis Communications.
   All rights reserved.

   Redistribution and use in source and binary forms, with or without
@ -32,8 +32,11 @@ __setup:
 /* Make sure to save SRP.  */
 #ifdef __arch_common_v10_v32
 /* Can't do anything if we don't know for which arch.  This file is
-    then only a placeholder.  Oh, and we can't use the "ret" insn in
-    "common" code.  */
+    then only a placeholder.  Oh, and we can't use the "ret" and "nop"
+    insns in "common" code.  */
+ move $srp,$r9
+ jump $r9
+ setf
 #else
 /* Code missing:
    - Initialize RAM circuits.