ba3049ed40
Arguably using the address error handler has always been ugly. But with processors that handle unaligned loads and stores in hardware the current mechanism ceases to work so switch it to a BREAK instruction and allocate break code 514 to the FPU emulator. Yoichi Yuasa provided a build fix for CONFIG_BUG=n. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
35 lines
1.5 KiB
C
35 lines
1.5 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1995, 2003 by Ralf Baechle
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* Copyright (C) 1999 Silicon Graphics, Inc.
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*/
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#ifndef __ASM_BREAK_H
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#define __ASM_BREAK_H
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/*
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* The following break codes are or were in use for specific purposes in
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* other MIPS operating systems. Linux/MIPS doesn't use all of them. The
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* unused ones are here as placeholders; we might encounter them in
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* non-Linux/MIPS object files or make use of them in the future.
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*/
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#define BRK_USERBP 0 /* User bp (used by debuggers) */
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#define BRK_KERNELBP 1 /* Break in the kernel */
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#define BRK_ABORT 2 /* Sometimes used by abort(3) to SIGIOT */
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#define BRK_BD_TAKEN 3 /* For bd slot emulation - not implemented */
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#define BRK_BD_NOTTAKEN 4 /* For bd slot emulation - not implemented */
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#define BRK_SSTEPBP 5 /* User bp (used by debuggers) */
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#define BRK_OVERFLOW 6 /* Overflow check */
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#define BRK_DIVZERO 7 /* Divide by zero check */
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#define BRK_RANGE 8 /* Range error check */
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#define BRK_STACKOVERFLOW 9 /* For Ada stackchecking */
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#define BRK_NORLD 10 /* No rld found - not used by Linux/MIPS */
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#define _BRK_THREADBP 11 /* For threads, user bp (used by debuggers) */
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#define BRK_BUG 512 /* Used by BUG() */
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#define BRK_KDB 513 /* Used in KDB_ENTER() */
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#define BRK_MEMU 514 /* Used by FPU emulator */
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#define BRK_MULOVF 1023 /* Multiply overflow */
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#endif /* __ASM_BREAK_H */
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