cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

gdbstub.c (3209B)

      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 "exec/gdbstub.h"
     23
     24int crisv10_cpu_gdb_read_register(CPUState *cs, GByteArray *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, GByteArray *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}