Andreas Färber | 25d8ac0 | 2013-07-07 12:57:38 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Xtensa 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 | */ |
Andreas Färber | 5b50e79 | 2013-06-29 04:18:45 +0200 | [diff] [blame] | 20 | #include "config.h" |
| 21 | #include "qemu-common.h" |
| 22 | #include "exec/gdbstub.h" |
Andreas Färber | 25d8ac0 | 2013-07-07 12:57:38 +0200 | [diff] [blame] | 23 | |
Andreas Färber | 5b50e79 | 2013-06-29 04:18:45 +0200 | [diff] [blame] | 24 | int xtensa_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n) |
Andreas Färber | 25d8ac0 | 2013-07-07 12:57:38 +0200 | [diff] [blame] | 25 | { |
Andreas Färber | 5b50e79 | 2013-06-29 04:18:45 +0200 | [diff] [blame] | 26 | XtensaCPU *cpu = XTENSA_CPU(cs); |
| 27 | CPUXtensaState *env = &cpu->env; |
Andreas Färber | 25d8ac0 | 2013-07-07 12:57:38 +0200 | [diff] [blame] | 28 | const XtensaGdbReg *reg = env->config->gdb_regmap.reg + n; |
| 29 | |
| 30 | if (n < 0 || n >= env->config->gdb_regmap.num_regs) { |
| 31 | return 0; |
| 32 | } |
| 33 | |
| 34 | switch (reg->type) { |
| 35 | case 9: /*pc*/ |
Andreas Färber | 986a299 | 2013-07-07 13:05:05 +0200 | [diff] [blame] | 36 | return gdb_get_reg32(mem_buf, env->pc); |
Andreas Färber | 25d8ac0 | 2013-07-07 12:57:38 +0200 | [diff] [blame] | 37 | |
| 38 | case 1: /*ar*/ |
| 39 | xtensa_sync_phys_from_window(env); |
Andreas Färber | 986a299 | 2013-07-07 13:05:05 +0200 | [diff] [blame] | 40 | return gdb_get_reg32(mem_buf, env->phys_regs[(reg->targno & 0xff) |
| 41 | % env->config->nareg]); |
Andreas Färber | 25d8ac0 | 2013-07-07 12:57:38 +0200 | [diff] [blame] | 42 | |
| 43 | case 2: /*SR*/ |
Andreas Färber | 986a299 | 2013-07-07 13:05:05 +0200 | [diff] [blame] | 44 | return gdb_get_reg32(mem_buf, env->sregs[reg->targno & 0xff]); |
Andreas Färber | 25d8ac0 | 2013-07-07 12:57:38 +0200 | [diff] [blame] | 45 | |
| 46 | case 3: /*UR*/ |
Andreas Färber | 986a299 | 2013-07-07 13:05:05 +0200 | [diff] [blame] | 47 | return gdb_get_reg32(mem_buf, env->uregs[reg->targno & 0xff]); |
Andreas Färber | 25d8ac0 | 2013-07-07 12:57:38 +0200 | [diff] [blame] | 48 | |
| 49 | case 4: /*f*/ |
Andreas Färber | 986a299 | 2013-07-07 13:05:05 +0200 | [diff] [blame] | 50 | return gdb_get_reg32(mem_buf, float32_val(env->fregs[reg->targno |
| 51 | & 0x0f])); |
Andreas Färber | 25d8ac0 | 2013-07-07 12:57:38 +0200 | [diff] [blame] | 52 | |
| 53 | case 8: /*a*/ |
Andreas Färber | 986a299 | 2013-07-07 13:05:05 +0200 | [diff] [blame] | 54 | return gdb_get_reg32(mem_buf, env->regs[reg->targno & 0x0f]); |
Andreas Färber | 25d8ac0 | 2013-07-07 12:57:38 +0200 | [diff] [blame] | 55 | |
| 56 | default: |
| 57 | qemu_log("%s from reg %d of unsupported type %d\n", |
| 58 | __func__, n, reg->type); |
| 59 | return 0; |
| 60 | } |
| 61 | } |
| 62 | |
Andreas Färber | 5b50e79 | 2013-06-29 04:18:45 +0200 | [diff] [blame] | 63 | int xtensa_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n) |
Andreas Färber | 25d8ac0 | 2013-07-07 12:57:38 +0200 | [diff] [blame] | 64 | { |
Andreas Färber | 5b50e79 | 2013-06-29 04:18:45 +0200 | [diff] [blame] | 65 | XtensaCPU *cpu = XTENSA_CPU(cs); |
| 66 | CPUXtensaState *env = &cpu->env; |
Andreas Färber | 25d8ac0 | 2013-07-07 12:57:38 +0200 | [diff] [blame] | 67 | uint32_t tmp; |
| 68 | const XtensaGdbReg *reg = env->config->gdb_regmap.reg + n; |
| 69 | |
| 70 | if (n < 0 || n >= env->config->gdb_regmap.num_regs) { |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | tmp = ldl_p(mem_buf); |
| 75 | |
| 76 | switch (reg->type) { |
| 77 | case 9: /*pc*/ |
| 78 | env->pc = tmp; |
| 79 | break; |
| 80 | |
| 81 | case 1: /*ar*/ |
| 82 | env->phys_regs[(reg->targno & 0xff) % env->config->nareg] = tmp; |
| 83 | xtensa_sync_window_from_phys(env); |
| 84 | break; |
| 85 | |
| 86 | case 2: /*SR*/ |
| 87 | env->sregs[reg->targno & 0xff] = tmp; |
| 88 | break; |
| 89 | |
| 90 | case 3: /*UR*/ |
| 91 | env->uregs[reg->targno & 0xff] = tmp; |
| 92 | break; |
| 93 | |
| 94 | case 4: /*f*/ |
| 95 | env->fregs[reg->targno & 0x0f] = make_float32(tmp); |
| 96 | break; |
| 97 | |
| 98 | case 8: /*a*/ |
| 99 | env->regs[reg->targno & 0x0f] = tmp; |
| 100 | break; |
| 101 | |
| 102 | default: |
| 103 | qemu_log("%s to reg %d of unsupported type %d\n", |
| 104 | __func__, n, reg->type); |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | return 4; |
| 109 | } |