1 /* 2 * PowerPC MMU stub handling for user mode emulation 3 * 4 * Copyright (c) 2003-2007 Jocelyn Mayer 5 * Copyright (c) 2013 David Gibson, IBM Corporation. 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #include "qemu/osdep.h" 22 #include "cpu.h" 23 #include "exec/exec-all.h" 24 #include "internal.h" 25 26 void ppc_cpu_record_sigsegv(CPUState *cs, vaddr address, 27 MMUAccessType access_type, 28 bool maperr, uintptr_t retaddr) 29 { 30 CPUPPCState *env = cpu_env(cs); 31 int exception, error_code; 32 33 /* 34 * Both DSISR and the "trap number" (exception vector offset, 35 * looked up from exception_index) are present in the linux-user 36 * signal frame. 37 * FIXME: we don't actually populate the trap number properly. 38 * It would be easiest to fill in an env->trap value now. 39 */ 40 if (access_type == MMU_INST_FETCH) { 41 exception = POWERPC_EXCP_ISI; 42 error_code = 0x40000000; 43 } else { 44 exception = POWERPC_EXCP_DSI; 45 error_code = 0x40000000; 46 if (access_type == MMU_DATA_STORE) { 47 error_code |= 0x02000000; 48 } 49 env->spr[SPR_DAR] = address; 50 env->spr[SPR_DSISR] = error_code; 51 } 52 cs->exception_index = exception; 53 env->error_code = error_code; 54 cpu_loop_exit_restore(cs, retaddr); 55 } 56