root / target-cris / gdbstub.c @ 986a2998
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/*
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* CRIS gdb server stub
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*
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* Copyright (c) 2003-2005 Fabrice Bellard
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* Copyright (c) 2013 SUSE LINUX Products GmbH
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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static int |
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read_register_crisv10(CPUCRISState *env, uint8_t *mem_buf, int n)
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{
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if (n < 15) { |
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return gdb_get_reg32(mem_buf, env->regs[n]);
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} |
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if (n == 15) { |
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return gdb_get_reg32(mem_buf, env->pc);
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} |
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if (n < 32) { |
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switch (n) {
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case 16: |
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return gdb_get_reg8(mem_buf, env->pregs[n - 16]); |
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case 17: |
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return gdb_get_reg8(mem_buf, env->pregs[n - 16]); |
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case 20: |
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case 21: |
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return gdb_get_reg16(mem_buf, env->pregs[n - 16]); |
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default:
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if (n >= 23) { |
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return gdb_get_reg32(mem_buf, env->pregs[n - 16]); |
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} |
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break;
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} |
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} |
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return 0; |
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} |
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static int cpu_gdb_read_register(CPUCRISState *env, uint8_t *mem_buf, int n) |
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{
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uint8_t srs; |
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if (env->pregs[PR_VR] < 32) { |
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return read_register_crisv10(env, mem_buf, n);
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} |
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srs = env->pregs[PR_SRS]; |
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if (n < 16) { |
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return gdb_get_reg32(mem_buf, env->regs[n]);
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} |
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if (n >= 21 && n < 32) { |
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return gdb_get_reg32(mem_buf, env->pregs[n - 16]); |
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} |
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if (n >= 33 && n < 49) { |
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return gdb_get_reg32(mem_buf, env->sregs[srs][n - 33]); |
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} |
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switch (n) {
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case 16: |
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return gdb_get_reg8(mem_buf, env->pregs[0]); |
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case 17: |
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return gdb_get_reg8(mem_buf, env->pregs[1]); |
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case 18: |
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return gdb_get_reg32(mem_buf, env->pregs[2]); |
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case 19: |
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return gdb_get_reg8(mem_buf, srs);
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case 20: |
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return gdb_get_reg16(mem_buf, env->pregs[4]); |
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case 32: |
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return gdb_get_reg32(mem_buf, env->pc);
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} |
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return 0; |
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} |
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static int cpu_gdb_write_register(CPUCRISState *env, uint8_t *mem_buf, int n) |
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{
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uint32_t tmp; |
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if (n > 49) { |
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return 0; |
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} |
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tmp = ldl_p(mem_buf); |
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if (n < 16) { |
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env->regs[n] = tmp; |
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} |
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if (n >= 21 && n < 32) { |
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env->pregs[n - 16] = tmp;
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} |
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/* FIXME: Should support function regs be writable? */
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switch (n) {
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case 16: |
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return 1; |
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case 17: |
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return 1; |
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case 18: |
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env->pregs[PR_PID] = tmp; |
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break;
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case 19: |
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return 1; |
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case 20: |
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return 2; |
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case 32: |
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env->pc = tmp; |
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break;
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} |
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return 4; |
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} |