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 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 "exec/gdbstub.h" 23 24 int crisv10_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n) 25 { 26 CRISCPU *cpu = CRIS_CPU(cs); 27 CPUCRISState *env = &cpu->env; 28 29 if (n < 15) { 30 return gdb_get_reg32(mem_buf, env->regs[n]); 31 } 32 33 if (n == 15) { 34 return gdb_get_reg32(mem_buf, env->pc); 35 } 36 37 if (n < 32) { 38 switch (n) { 39 case 16: 40 return gdb_get_reg8(mem_buf, env->pregs[n - 16]); 41 case 17: 42 return gdb_get_reg8(mem_buf, env->pregs[n - 16]); 43 case 20: 44 case 21: 45 return gdb_get_reg16(mem_buf, env->pregs[n - 16]); 46 default: 47 if (n >= 23) { 48 return gdb_get_reg32(mem_buf, env->pregs[n - 16]); 49 } 50 break; 51 } 52 } 53 return 0; 54 } 55 56 int cris_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n) 57 { 58 CRISCPU *cpu = CRIS_CPU(cs); 59 CPUCRISState *env = &cpu->env; 60 uint8_t srs; 61 62 srs = env->pregs[PR_SRS]; 63 if (n < 16) { 64 return gdb_get_reg32(mem_buf, env->regs[n]); 65 } 66 67 if (n >= 21 && n < 32) { 68 return gdb_get_reg32(mem_buf, env->pregs[n - 16]); 69 } 70 if (n >= 33 && n < 49) { 71 return gdb_get_reg32(mem_buf, env->sregs[srs][n - 33]); 72 } 73 switch (n) { 74 case 16: 75 return gdb_get_reg8(mem_buf, env->pregs[0]); 76 case 17: 77 return gdb_get_reg8(mem_buf, env->pregs[1]); 78 case 18: 79 return gdb_get_reg32(mem_buf, env->pregs[2]); 80 case 19: 81 return gdb_get_reg8(mem_buf, srs); 82 case 20: 83 return gdb_get_reg16(mem_buf, env->pregs[4]); 84 case 32: 85 return gdb_get_reg32(mem_buf, env->pc); 86 } 87 88 return 0; 89 } 90 91 int cris_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n) 92 { 93 CRISCPU *cpu = CRIS_CPU(cs); 94 CPUCRISState *env = &cpu->env; 95 uint32_t tmp; 96 97 if (n > 49) { 98 return 0; 99 } 100 101 tmp = ldl_p(mem_buf); 102 103 if (n < 16) { 104 env->regs[n] = tmp; 105 } 106 107 if (n >= 21 && n < 32) { 108 env->pregs[n - 16] = tmp; 109 } 110 111 /* FIXME: Should support function regs be writable? */ 112 switch (n) { 113 case 16: 114 return 1; 115 case 17: 116 return 1; 117 case 18: 118 env->pregs[PR_PID] = tmp; 119 break; 120 case 19: 121 return 1; 122 case 20: 123 return 2; 124 case 32: 125 env->pc = tmp; 126 break; 127 } 128 129 return 4; 130 } 131