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-rw-r--r--target/s390x/gdbstub.c313
1 files changed, 313 insertions, 0 deletions
diff --git a/target/s390x/gdbstub.c b/target/s390x/gdbstub.c
new file mode 100644
index 0000000000..3d223dec97
--- /dev/null
+++ b/target/s390x/gdbstub.c
@@ -0,0 +1,313 @@
+/*
+ * 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 "qemu/osdep.h"
+#include "qemu-common.h"
+#include "cpu.h"
+#include "exec/exec-all.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:
+ if (tcg_enabled()) {
+ 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);
+ }
+ return gdb_get_regl(mem_buf, env->psw.mask);
+ 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]);
+ }
+ 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 = ldtul_p(mem_buf);
+
+ switch (n) {
+ case S390_PSWM_REGNUM:
+ env->psw.mask = tmpl;
+ if (tcg_enabled()) {
+ 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;
+ default:
+ return 0;
+ }
+ return 8;
+}
+
+/* the values represent the positions in s390-acr.xml */
+#define S390_A0_REGNUM 0
+#define S390_A15_REGNUM 15
+/* total number of registers in s390-acr.xml */
+#define S390_NUM_AC_REGS 16
+
+static int cpu_read_ac_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
+{
+ switch (n) {
+ case S390_A0_REGNUM ... S390_A15_REGNUM:
+ return gdb_get_reg32(mem_buf, env->aregs[n]);
+ default:
+ return 0;
+ }
+}
+
+static int cpu_write_ac_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
+{
+ switch (n) {
+ case S390_A0_REGNUM ... S390_A15_REGNUM:
+ env->aregs[n] = ldl_p(mem_buf);
+ cpu_synchronize_post_init(ENV_GET_CPU(env));
+ return 4;
+ default:
+ return 0;
+ }
+}
+
+/* the values represent the positions in s390-fpr.xml */
+#define S390_FPC_REGNUM 0
+#define S390_F0_REGNUM 1
+#define S390_F15_REGNUM 16
+/* total number of registers in s390-fpr.xml */
+#define S390_NUM_FP_REGS 17
+
+static int cpu_read_fp_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
+{
+ switch (n) {
+ 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, get_freg(env, n - S390_F0_REGNUM)->ll);
+ default:
+ return 0;
+ }
+}
+
+static int cpu_write_fp_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
+{
+ switch (n) {
+ case S390_FPC_REGNUM:
+ env->fpc = ldl_p(mem_buf);
+ return 4;
+ case S390_F0_REGNUM ... S390_F15_REGNUM:
+ get_freg(env, n - S390_F0_REGNUM)->ll = ldtul_p(mem_buf);
+ return 8;
+ default:
+ return 0;
+ }
+}
+
+/* the values represent the positions in s390-vx.xml */
+#define S390_V0L_REGNUM 0
+#define S390_V15L_REGNUM 15
+#define S390_V16_REGNUM 16
+#define S390_V31_REGNUM 31
+/* total number of registers in s390-vx.xml */
+#define S390_NUM_VREGS 32
+
+static int cpu_read_vreg(CPUS390XState *env, uint8_t *mem_buf, int n)
+{
+ int ret;
+
+ switch (n) {
+ case S390_V0L_REGNUM ... S390_V15L_REGNUM:
+ ret = gdb_get_reg64(mem_buf, env->vregs[n][1].ll);
+ break;
+ case S390_V16_REGNUM ... S390_V31_REGNUM:
+ ret = gdb_get_reg64(mem_buf, env->vregs[n][0].ll);
+ ret += gdb_get_reg64(mem_buf + 8, env->vregs[n][1].ll);
+ break;
+ default:
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static int cpu_write_vreg(CPUS390XState *env, uint8_t *mem_buf, int n)
+{
+ switch (n) {
+ case S390_V0L_REGNUM ... S390_V15L_REGNUM:
+ env->vregs[n][1].ll = ldtul_p(mem_buf + 8);
+ return 8;
+ case S390_V16_REGNUM ... S390_V31_REGNUM:
+ env->vregs[n][0].ll = ldtul_p(mem_buf);
+ env->vregs[n][1].ll = ldtul_p(mem_buf + 8);
+ return 16;
+ default:
+ return 0;
+ }
+}
+
+/* the values represent the positions in s390-cr.xml */
+#define S390_C0_REGNUM 0
+#define S390_C15_REGNUM 15
+/* total number of registers in s390-cr.xml */
+#define S390_NUM_C_REGS 16
+
+#ifndef CONFIG_USER_ONLY
+static int cpu_read_c_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
+{
+ switch (n) {
+ case S390_C0_REGNUM ... S390_C15_REGNUM:
+ return gdb_get_regl(mem_buf, env->cregs[n]);
+ default:
+ return 0;
+ }
+}
+
+static int cpu_write_c_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
+{
+ switch (n) {
+ case S390_C0_REGNUM ... S390_C15_REGNUM:
+ env->cregs[n] = ldtul_p(mem_buf);
+ if (tcg_enabled()) {
+ tlb_flush(ENV_GET_CPU(env), 1);
+ }
+ cpu_synchronize_post_init(ENV_GET_CPU(env));
+ return 8;
+ default:
+ return 0;
+ }
+}
+
+/* the values represent the positions in s390-virt.xml */
+#define S390_VIRT_CKC_REGNUM 0
+#define S390_VIRT_CPUTM_REGNUM 1
+#define S390_VIRT_BEA_REGNUM 2
+#define S390_VIRT_PREFIX_REGNUM 3
+#define S390_VIRT_PP_REGNUM 4
+#define S390_VIRT_PFT_REGNUM 5
+#define S390_VIRT_PFS_REGNUM 6
+#define S390_VIRT_PFC_REGNUM 7
+/* total number of registers in s390-virt.xml */
+#define S390_NUM_VIRT_REGS 8
+
+static int cpu_read_virt_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
+{
+ switch (n) {
+ case S390_VIRT_CKC_REGNUM:
+ return gdb_get_regl(mem_buf, env->ckc);
+ case S390_VIRT_CPUTM_REGNUM:
+ return gdb_get_regl(mem_buf, env->cputm);
+ case S390_VIRT_BEA_REGNUM:
+ return gdb_get_regl(mem_buf, env->gbea);
+ case S390_VIRT_PREFIX_REGNUM:
+ return gdb_get_regl(mem_buf, env->psa);
+ case S390_VIRT_PP_REGNUM:
+ return gdb_get_regl(mem_buf, env->pp);
+ case S390_VIRT_PFT_REGNUM:
+ return gdb_get_regl(mem_buf, env->pfault_token);
+ case S390_VIRT_PFS_REGNUM:
+ return gdb_get_regl(mem_buf, env->pfault_select);
+ case S390_VIRT_PFC_REGNUM:
+ return gdb_get_regl(mem_buf, env->pfault_compare);
+ default:
+ return 0;
+ }
+}
+
+static int cpu_write_virt_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
+{
+ switch (n) {
+ case S390_VIRT_CKC_REGNUM:
+ env->ckc = ldtul_p(mem_buf);
+ cpu_synchronize_post_init(ENV_GET_CPU(env));
+ return 8;
+ case S390_VIRT_CPUTM_REGNUM:
+ env->cputm = ldtul_p(mem_buf);
+ cpu_synchronize_post_init(ENV_GET_CPU(env));
+ return 8;
+ case S390_VIRT_BEA_REGNUM:
+ env->gbea = ldtul_p(mem_buf);
+ cpu_synchronize_post_init(ENV_GET_CPU(env));
+ return 8;
+ case S390_VIRT_PREFIX_REGNUM:
+ env->psa = ldtul_p(mem_buf);
+ cpu_synchronize_post_init(ENV_GET_CPU(env));
+ return 8;
+ case S390_VIRT_PP_REGNUM:
+ env->pp = ldtul_p(mem_buf);
+ cpu_synchronize_post_init(ENV_GET_CPU(env));
+ return 8;
+ case S390_VIRT_PFT_REGNUM:
+ env->pfault_token = ldtul_p(mem_buf);
+ cpu_synchronize_post_init(ENV_GET_CPU(env));
+ return 8;
+ case S390_VIRT_PFS_REGNUM:
+ env->pfault_select = ldtul_p(mem_buf);
+ cpu_synchronize_post_init(ENV_GET_CPU(env));
+ return 8;
+ case S390_VIRT_PFC_REGNUM:
+ env->pfault_compare = ldtul_p(mem_buf);
+ cpu_synchronize_post_init(ENV_GET_CPU(env));
+ return 8;
+ default:
+ return 0;
+ }
+}
+#endif
+
+void s390_cpu_gdb_init(CPUState *cs)
+{
+ gdb_register_coprocessor(cs, cpu_read_ac_reg,
+ cpu_write_ac_reg,
+ S390_NUM_AC_REGS, "s390-acr.xml", 0);
+
+ gdb_register_coprocessor(cs, cpu_read_fp_reg,
+ cpu_write_fp_reg,
+ S390_NUM_FP_REGS, "s390-fpr.xml", 0);
+
+ gdb_register_coprocessor(cs, cpu_read_vreg,
+ cpu_write_vreg,
+ S390_NUM_VREGS, "s390-vx.xml", 0);
+
+#ifndef CONFIG_USER_ONLY
+ gdb_register_coprocessor(cs, cpu_read_c_reg,
+ cpu_write_c_reg,
+ S390_NUM_C_REGS, "s390-cr.xml", 0);
+
+ if (kvm_enabled()) {
+ gdb_register_coprocessor(cs, cpu_read_virt_reg,
+ cpu_write_virt_reg,
+ S390_NUM_VIRT_REGS, "s390-virt.xml", 0);
+ }
+#endif
+}
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