* 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.
+ * version 2.1 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
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
-#include "qemu-common.h"
#include "cpu.h"
#include "exec/gdbstub.h"
#include "qemu/log.h"
-int xtensa_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
+enum {
+ xtRegisterTypeArRegfile = 1, /* Register File ar0..arXX. */
+ xtRegisterTypeSpecialReg, /* CPU states, such as PS, Booleans, (rsr). */
+ xtRegisterTypeUserReg, /* User defined registers (rur). */
+ xtRegisterTypeTieRegfile, /* User define register files. */
+ xtRegisterTypeTieState, /* TIE States (mapped on user regs). */
+ xtRegisterTypeMapped, /* Mapped on Special Registers. */
+ xtRegisterTypeUnmapped, /* Special case of masked registers. */
+ xtRegisterTypeWindow, /* Live window registers (a0..a15). */
+ xtRegisterTypeVirtual, /* PC, FP. */
+ xtRegisterTypeUnknown
+};
+
+#define XTENSA_REGISTER_FLAGS_PRIVILEGED 0x0001
+#define XTENSA_REGISTER_FLAGS_READABLE 0x0002
+#define XTENSA_REGISTER_FLAGS_WRITABLE 0x0004
+#define XTENSA_REGISTER_FLAGS_VOLATILE 0x0008
+
+void xtensa_count_regs(const XtensaConfig *config,
+ unsigned *n_regs, unsigned *n_core_regs)
+{
+ unsigned i;
+ bool count_core_regs = true;
+
+ for (i = 0; config->gdb_regmap.reg[i].targno >= 0; ++i) {
+ if (config->gdb_regmap.reg[i].type != xtRegisterTypeTieState &&
+ config->gdb_regmap.reg[i].type != xtRegisterTypeMapped &&
+ config->gdb_regmap.reg[i].type != xtRegisterTypeUnmapped) {
+ ++*n_regs;
+ if (count_core_regs) {
+ if ((config->gdb_regmap.reg[i].flags &
+ XTENSA_REGISTER_FLAGS_PRIVILEGED) == 0) {
+ ++*n_core_regs;
+ } else {
+ count_core_regs = false;
+ }
+ }
+ }
+ }
+}
+
+int xtensa_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
{
XtensaCPU *cpu = XTENSA_CPU(cs);
CPUXtensaState *env = &cpu->env;
const XtensaGdbReg *reg = env->config->gdb_regmap.reg + n;
+#ifdef CONFIG_USER_ONLY
+ int num_regs = env->config->gdb_regmap.num_core_regs;
+#else
+ int num_regs = env->config->gdb_regmap.num_regs;
+#endif
unsigned i;
- if (n < 0 || n >= env->config->gdb_regmap.num_regs) {
+ if (n < 0 || n >= num_regs) {
return 0;
}
switch (reg->type) {
- case 9: /*pc*/
+ case xtRegisterTypeVirtual: /*pc*/
return gdb_get_reg32(mem_buf, env->pc);
- case 1: /*ar*/
+ case xtRegisterTypeArRegfile: /*ar*/
xtensa_sync_phys_from_window(env);
return gdb_get_reg32(mem_buf, env->phys_regs[(reg->targno & 0xff)
% env->config->nareg]);
- case 2: /*SR*/
+ case xtRegisterTypeSpecialReg: /*SR*/
return gdb_get_reg32(mem_buf, env->sregs[reg->targno & 0xff]);
- case 3: /*UR*/
+ case xtRegisterTypeUserReg: /*UR*/
return gdb_get_reg32(mem_buf, env->uregs[reg->targno & 0xff]);
- case 4: /*f*/
+ case xtRegisterTypeTieRegfile: /*f*/
i = reg->targno & 0x0f;
switch (reg->size) {
case 4:
case 8:
return gdb_get_reg64(mem_buf, float64_val(env->fregs[i].f64));
default:
- return 0;
+ qemu_log_mask(LOG_UNIMP, "%s from reg %d of unsupported size %d\n",
+ __func__, n, reg->size);
+ return gdb_get_zeroes(mem_buf, reg->size);
}
- case 8: /*a*/
+ case xtRegisterTypeWindow: /*a*/
return gdb_get_reg32(mem_buf, env->regs[reg->targno & 0x0f]);
default:
qemu_log_mask(LOG_UNIMP, "%s from reg %d of unsupported type %d\n",
__func__, n, reg->type);
- return 0;
+ return gdb_get_zeroes(mem_buf, reg->size);
}
}
CPUXtensaState *env = &cpu->env;
uint32_t tmp;
const XtensaGdbReg *reg = env->config->gdb_regmap.reg + n;
+#ifdef CONFIG_USER_ONLY
+ int num_regs = env->config->gdb_regmap.num_core_regs;
+#else
+ int num_regs = env->config->gdb_regmap.num_regs;
+#endif
- if (n < 0 || n >= env->config->gdb_regmap.num_regs) {
+ if (n < 0 || n >= num_regs) {
return 0;
}
tmp = ldl_p(mem_buf);
switch (reg->type) {
- case 9: /*pc*/
+ case xtRegisterTypeVirtual: /*pc*/
env->pc = tmp;
break;
- case 1: /*ar*/
+ case xtRegisterTypeArRegfile: /*ar*/
env->phys_regs[(reg->targno & 0xff) % env->config->nareg] = tmp;
xtensa_sync_window_from_phys(env);
break;
- case 2: /*SR*/
+ case xtRegisterTypeSpecialReg: /*SR*/
env->sregs[reg->targno & 0xff] = tmp;
break;
- case 3: /*UR*/
+ case xtRegisterTypeUserReg: /*UR*/
env->uregs[reg->targno & 0xff] = tmp;
break;
- case 4: /*f*/
+ case xtRegisterTypeTieRegfile: /*f*/
switch (reg->size) {
case 4:
env->fregs[reg->targno & 0x0f].f32[FP_F32_LOW] = make_float32(tmp);
env->fregs[reg->targno & 0x0f].f64 = make_float64(tmp);
return 8;
default:
- return 0;
+ qemu_log_mask(LOG_UNIMP, "%s to reg %d of unsupported size %d\n",
+ __func__, n, reg->size);
+ return reg->size;
}
- case 8: /*a*/
+ case xtRegisterTypeWindow: /*a*/
env->regs[reg->targno & 0x0f] = tmp;
break;
default:
qemu_log_mask(LOG_UNIMP, "%s to reg %d of unsupported type %d\n",
__func__, n, reg->type);
- return 0;
+ return reg->size;
}
return 4;
projects / qemu.git / blobdiff