1 /* 2 * CRIS 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 crisv10_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n) 25 { 26 CPUCRISState *env = cpu_env(cs); 27 28 if (n < 15) { 29 return gdb_get_reg32(mem_buf, env->regs[n]); 30 } 31 32 if (n == 15) { 33 return gdb_get_reg32(mem_buf, env->pc); 34 } 35 36 if (n < 32) { 37 switch (n) { 38 case 16: 39 return gdb_get_reg8(mem_buf, env->pregs[n - 16]); 40 case 17: 41 return gdb_get_reg8(mem_buf, env->pregs[n - 16]); 42 case 20: 43 case 21: 44 return gdb_get_reg16(mem_buf, env->pregs[n - 16]); 45 default: 46 if (n >= 23) { 47 return gdb_get_reg32(mem_buf, env->pregs[n - 16]); 48 } 49 break; 50 } 51 } 52 return 0; 53 } 54 55 int cris_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n) 56 { 57 CPUCRISState *env = cpu_env(cs); 58 uint8_t srs; 59 60 srs = env->pregs[PR_SRS]; 61 if (n < 16) { 62 return gdb_get_reg32(mem_buf, env->regs[n]); 63 } 64 65 if (n >= 21 && n < 32) { 66 return gdb_get_reg32(mem_buf, env->pregs[n - 16]); 67 } 68 if (n >= 33 && n < 49) { 69 return gdb_get_reg32(mem_buf, env->sregs[srs][n - 33]); 70 } 71 switch (n) { 72 case 16: 73 return gdb_get_reg8(mem_buf, env->pregs[0]); 74 case 17: 75 return gdb_get_reg8(mem_buf, env->pregs[1]); 76 case 18: 77 return gdb_get_reg32(mem_buf, env->pregs[2]); 78 case 19: 79 return gdb_get_reg8(mem_buf, srs); 80 case 20: 81 return gdb_get_reg16(mem_buf, env->pregs[4]); 82 case 32: 83 return gdb_get_reg32(mem_buf, env->pc); 84 } 85 86 return 0; 87 } 88 89 int cris_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n) 90 { 91 CPUCRISState *env = cpu_env(cs); 92 uint32_t tmp; 93 94 if (n > 49) { 95 return 0; 96 } 97 98 tmp = ldl_p(mem_buf); 99 100 if (n < 16) { 101 env->regs[n] = tmp; 102 } 103 104 if (n >= 21 && n < 32) { 105 env->pregs[n - 16] = tmp; 106 } 107 108 /* FIXME: Should support function regs be writable? */ 109 switch (n) { 110 case 16: 111 return 1; 112 case 17: 113 return 1; 114 case 18: 115 env->pregs[PR_PID] = tmp; 116 break; 117 case 19: 118 return 1; 119 case 20: 120 return 2; 121 case 32: 122 env->pc = tmp; 123 break; 124 } 125 126 return 4; 127 } 128