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/*
* PowerPC MMU stub handling for user mode emulation
*
* Copyright (c) 2003-2007 Jocelyn Mayer
* Copyright (c) 2013 David Gibson, IBM Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "internal.h"
void ppc_cpu_record_sigsegv(CPUState *cs, vaddr address,
MMUAccessType access_type,
bool maperr, uintptr_t retaddr)
{
PowerPCCPU *cpu = POWERPC_CPU(cs);
CPUPPCState *env = &cpu->env;
int exception, error_code;
/*
* Both DSISR and the "trap number" (exception vector offset,
* looked up from exception_index) are present in the linux-user
* signal frame.
* FIXME: we don't actually populate the trap number properly.
* It would be easiest to fill in an env->trap value now.
*/
if (access_type == MMU_INST_FETCH) {
exception = POWERPC_EXCP_ISI;
error_code = 0x40000000;
} else {
exception = POWERPC_EXCP_DSI;
error_code = 0x40000000;
if (access_type == MMU_DATA_STORE) {
error_code |= 0x02000000;
}
env->spr[SPR_DAR] = address;
env->spr[SPR_DSISR] = error_code;
}
cs->exception_index = exception;
env->error_code = error_code;
cpu_loop_exit_restore(cs, retaddr);
}
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