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

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"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.
This commit is contained in:
Hans-Peter Nilsson
2007-02-21 14:08:26 +00:00
parent 547c5c6104
commit 0bb4152b76
6 changed files with 124 additions and 24 deletions
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82
libgloss/cris/irqtable.S Normal file
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/* 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 */