Archipelago » qemu

/*

 * s390x gdb server stub

 *

 * Copyright (c) 2003-2005 Fabrice Bellard

 * Copyright (c) 2013 SUSE LINUX Products GmbH

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, see <http://www.gnu.org/licenses/>.

 */

#include "config.h"

#include "qemu-common.h"

#include "exec/gdbstub.h"

#include "qemu/bitops.h"

int s390_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)

{

    S390CPU *cpu = S390_CPU(cs);

    CPUS390XState *env = &cpu->env;

    uint64_t val;

    int cc_op;

    switch (n) {

    case S390_PSWM_REGNUM:

        cc_op = calc_cc(env, env->cc_op, env->cc_src, env->cc_dst, env->cc_vr);

        val = deposit64(env->psw.mask, 44, 2, cc_op);

        return gdb_get_regl(mem_buf, val);

    case S390_PSWA_REGNUM:

        return gdb_get_regl(mem_buf, env->psw.addr);

    case S390_R0_REGNUM ... S390_R15_REGNUM:

        return gdb_get_regl(mem_buf, env->regs[n-S390_R0_REGNUM]);

    case S390_A0_REGNUM ... S390_A15_REGNUM:

        return gdb_get_reg32(mem_buf, env->aregs[n-S390_A0_REGNUM]);

    case S390_FPC_REGNUM:

        return gdb_get_reg32(mem_buf, env->fpc);

    case S390_F0_REGNUM ... S390_F15_REGNUM:

        return gdb_get_reg64(mem_buf, env->fregs[n-S390_F0_REGNUM].ll);

    }

    return 0;

}

int s390_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)

{

    S390CPU *cpu = S390_CPU(cs);

    CPUS390XState *env = &cpu->env;

    target_ulong tmpl;

    uint32_t tmp32;

    int r = 8;

    tmpl = ldtul_p(mem_buf);

    tmp32 = ldl_p(mem_buf);

    switch (n) {

    case S390_PSWM_REGNUM:

        env->psw.mask = tmpl;

        env->cc_op = extract64(tmpl, 44, 2);

        break;

    case S390_PSWA_REGNUM:

        env->psw.addr = tmpl;

        break;

    case S390_R0_REGNUM ... S390_R15_REGNUM:

        env->regs[n-S390_R0_REGNUM] = tmpl;

        break;

    case S390_A0_REGNUM ... S390_A15_REGNUM:

        env->aregs[n-S390_A0_REGNUM] = tmp32;

        r = 4;

        break;

    case S390_FPC_REGNUM:

        env->fpc = tmp32;

        r = 4;

        break;

    case S390_F0_REGNUM ... S390_F15_REGNUM:

        env->fregs[n-S390_F0_REGNUM].ll = tmpl;

        break;

    default:

        return 0;

    }

    return r;

}