1 /* 2 * OpenRISC gdb server stub 3 * 4 * Copyright (c) 2003-2005 Fabrice Bellard 5 * Copyright (c) 2013 SUSE LINUX Products GmbH 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 #include "qemu/osdep.h" 21 #include "cpu.h" 22 #include "gdbstub/helpers.h" 23 24 int openrisc_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n) 25 { 26 CPUOpenRISCState *env = cpu_env(cs); 27 28 if (n < 32) { 29 return gdb_get_reg32(mem_buf, cpu_get_gpr(env, n)); 30 } else { 31 switch (n) { 32 case 32: /* PPC */ 33 return gdb_get_reg32(mem_buf, env->ppc); 34 35 case 33: /* NPC (equals PC) */ 36 return gdb_get_reg32(mem_buf, env->pc); 37 38 case 34: /* SR */ 39 return gdb_get_reg32(mem_buf, cpu_get_sr(env)); 40 41 default: 42 break; 43 } 44 } 45 return 0; 46 } 47 48 int openrisc_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n) 49 { 50 CPUClass *cc = CPU_GET_CLASS(cs); 51 CPUOpenRISCState *env = cpu_env(cs); 52 uint32_t tmp; 53 54 if (n > cc->gdb_num_core_regs) { 55 return 0; 56 } 57 58 tmp = ldl_p(mem_buf); 59 60 if (n < 32) { 61 cpu_set_gpr(env, n, tmp); 62 } else { 63 switch (n) { 64 case 32: /* PPC */ 65 env->ppc = tmp; 66 break; 67 68 case 33: /* NPC (equals PC) */ 69 /* If setting PC to something different, 70 also clear delayed branch status. */ 71 if (env->pc != tmp) { 72 env->pc = tmp; 73 env->dflag = 0; 74 } 75 break; 76 77 case 34: /* SR */ 78 cpu_set_sr(env, tmp); 79 break; 80 81 default: 82 break; 83 } 84 } 85 return 4; 86 } 87