1db8af5c87
Record DAR, DSISR, and exception_index. That last means that we must exit to cpu_loop ourselves, instead of letting exception_index being overwritten. This is exactly what the user-mode ppc_cpu_tlb_fill does, so simply rename it as ppc_cpu_record_sigsegv. Reviewed-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/*
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* PowerPC MMU stub handling for user mode emulation
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*
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* Copyright (c) 2003-2007 Jocelyn Mayer
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* Copyright (c) 2013 David Gibson, IBM Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "exec/exec-all.h"
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#include "internal.h"
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void ppc_cpu_record_sigsegv(CPUState *cs, vaddr address,
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MMUAccessType access_type,
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bool maperr, uintptr_t retaddr)
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{
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PowerPCCPU *cpu = POWERPC_CPU(cs);
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CPUPPCState *env = &cpu->env;
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int exception, error_code;
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/*
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* Both DSISR and the "trap number" (exception vector offset,
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* looked up from exception_index) are present in the linux-user
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* signal frame.
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* FIXME: we don't actually populate the trap number properly.
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* It would be easiest to fill in an env->trap value now.
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*/
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if (access_type == MMU_INST_FETCH) {
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exception = POWERPC_EXCP_ISI;
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error_code = 0x40000000;
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} else {
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exception = POWERPC_EXCP_DSI;
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error_code = 0x40000000;
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if (access_type == MMU_DATA_STORE) {
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error_code |= 0x02000000;
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}
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env->spr[SPR_DAR] = address;
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env->spr[SPR_DSISR] = error_code;
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}
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cs->exception_index = exception;
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env->error_code = error_code;
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cpu_loop_exit_restore(cs, retaddr);
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}
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