LXR qemu/target-cris/gdbstub.c

   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 "config.h"
  21#include "qemu-common.h"
  22#include "exec/gdbstub.h"
  23
  24int 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
  56int 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
  91int 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