/* * fp_emu.S * * Copyright Roman Zippel, 1997. 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, and the entire permission notice in its entirety, * including the disclaimer of warranties. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote * products derived from this software without specific prior * written permission. * * ALTERNATIVELY, this product may be distributed under the terms of * the GNU General Public License, in which case the provisions of the GPL are * required INSTEAD OF the above restrictions. (This clause is * necessary due to a potential bad interaction between the GPL and * the restrictions contained in a BSD-style copyright.) * * THIS SOFTWARE IS PROVIDED ``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 THE AUTHOR 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.
*/
| we jump here after an access error while trying to access
| user space, we correct stackpointer and send a SIGSEGV to
| the user process
fp_err_ua2:
addq.l #4,%sp
fp_err_ua1:
addq.l #4,%sp
move.l %a0,-(%sp)
pea LSEGV_MAPERR
pea LSIGSEGV
jsr fpemu_signal
add.w #12,%sp
jra ret_from_exception
#if defined(CONFIG_M68060)
| send a trace signal if we are debugged
| it does not really belong here, but...
fp_sendtrace060:
move.l (FPS_PC,%sp),-(%sp)
pea LTRAP_TRACE
pea LSIGTRAP
jsr fpemu_signal
add.w #12,%sp
jra ret_from_exception
#endif
| Entry points to get/put a register. Some of them can be get/put
| directly, others are on the stack, as we read/write the stack
| directly here, these function may only be called from within
| instruction decoding, otherwise the stack pointer is incorrect
| and the stack gets corrupted.
fp_get_data_reg:
jmp ([0f:w,%pc,%d0.w*4])
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