1 files changed, 100 insertions, 0 deletions
diff --git a/target-xtensa/gdbstub.c b/target-xtensa/gdbstub.c
new file mode 100644
index 0000000000..0880b7cd87
--- /dev/null
+++ b/target-xtensa/gdbstub.c
@@ -0,0 +1,100 @@
+/*
+ * Xtensa 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/>.
+ */
+
+static int cpu_gdb_read_register(CPUXtensaState *env, uint8_t *mem_buf, int n)
+{
+    const XtensaGdbReg *reg = env->config->gdb_regmap.reg + n;
+
+    if (n < 0 || n >= env->config->gdb_regmap.num_regs) {
+        return 0;
+    }
+
+    switch (reg->type) {
+    case 9: /*pc*/
+        GET_REG32(env->pc);
+
+    case 1: /*ar*/
+        xtensa_sync_phys_from_window(env);
+        GET_REG32(env->phys_regs[(reg->targno & 0xff) % env->config->nareg]);
+
+    case 2: /*SR*/
+        GET_REG32(env->sregs[reg->targno & 0xff]);
+
+    case 3: /*UR*/
+        GET_REG32(env->uregs[reg->targno & 0xff]);
+
+    case 4: /*f*/
+        GET_REG32(float32_val(env->fregs[reg->targno & 0x0f]));
+
+    case 8: /*a*/
+        GET_REG32(env->regs[reg->targno & 0x0f]);
+
+    default:
+        qemu_log("%s from reg %d of unsupported type %d\n",
+                 __func__, n, reg->type);
+        return 0;
+    }
+}
+
+static int cpu_gdb_write_register(CPUXtensaState *env, uint8_t *mem_buf, int n)
+{
+    uint32_t tmp;
+    const XtensaGdbReg *reg = env->config->gdb_regmap.reg + n;
+
+    if (n < 0 || n >= env->config->gdb_regmap.num_regs) {
+        return 0;
+    }
+
+    tmp = ldl_p(mem_buf);
+
+    switch (reg->type) {
+    case 9: /*pc*/
+        env->pc = tmp;
+        break;
+
+    case 1: /*ar*/
+        env->phys_regs[(reg->targno & 0xff) % env->config->nareg] = tmp;
+        xtensa_sync_window_from_phys(env);
+        break;
+
+    case 2: /*SR*/
+        env->sregs[reg->targno & 0xff] = tmp;
+        break;
+
+    case 3: /*UR*/
+        env->uregs[reg->targno & 0xff] = tmp;
+        break;
+
+    case 4: /*f*/
+        env->fregs[reg->targno & 0x0f] = make_float32(tmp);
+        break;
+
+    case 8: /*a*/
+        env->regs[reg->targno & 0x0f] = tmp;
+        break;
+
+    default:
+        qemu_log("%s to reg %d of unsupported type %d\n",
+                 __func__, n, reg->type);
+        return 0;
+    }
+
+    return 4;
+}