| 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 | CPUOpenRISCState *env = cpu_env(cs); |
| 51 | uint32_t tmp; |
| 52 | |
| 53 | tmp = ldl_be_p(mem_buf); |
| 54 | |
| 55 | if (n < 32) { |
| 56 | cpu_set_gpr(env, n, tmp); |
| 57 | } else { |
| 58 | switch (n) { |
| 59 | case 32: /* PPC */ |
| 60 | env->ppc = tmp; |
| 61 | break; |
| 62 | |
| 63 | case 33: /* NPC (equals PC) */ |
| 64 | /* If setting PC to something different, |
| 65 | also clear delayed branch status. */ |
| 66 | if (env->pc != tmp) { |
| 67 | env->pc = tmp; |
| 68 | env->dflag = 0; |
| 69 | } |
| 70 | break; |
| 71 | |
| 72 | case 34: /* SR */ |
| 73 | cpu_set_sr(env, tmp); |
| 74 | break; |
| 75 | |
| 76 | default: |
| 77 | break; |
| 78 | } |
| 79 | } |
| 80 | return 4; |
| 81 | } |