gdb: provide the name of the architecture in the target.xml

This patch provides the name of the architecture in the target.xml
if available.

This allows the remote gdb to detect the target architecture on its
own - so there is no need to specify it manually (e.g. if gdb is
started without a binary) using "set arch *arch_name*".

The name of the architecture is provided by a callback that can
be implemented by all architectures. The arm implementation has
special handling for iwmmxt and returns arm otherwise. This can
be extended if necessary.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
[rework to use a callback]
Message-Id: <1449144881-130935-1-git-send-email-borntraeger@de.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

2 files changed, 18 insertions, 0 deletions

diff --git a/target-arm/cpu.c b/target-arm/cpu.c
index 6c34476a3d..0e582c4410 100644
--- a/target-arm/cpu.c
+++ b/target-arm/cpu.c
@@ -1426,6 +1426,17 @@ static int arm_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
 }
 #endif
 
+static gchar *arm_gdb_arch_name(CPUState *cs)
+{
+    ARMCPU *cpu = ARM_CPU(cs);
+    CPUARMState *env = &cpu->env;
+
+    if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
+        return g_strdup("iwmmxt");
+    }
+    return g_strdup("arm");
+}
+
 static void arm_cpu_class_init(ObjectClass *oc, void *data)
 {
     ARMCPUClass *acc = ARM_CPU_CLASS(oc);
@@ -1460,6 +1471,7 @@ static void arm_cpu_class_init(ObjectClass *oc, void *data)
 #endif
     cc->gdb_num_core_regs = 26;
     cc->gdb_core_xml_file = "arm-core.xml";
+    cc->gdb_arch_name = arm_gdb_arch_name;
     cc->gdb_stop_before_watchpoint = true;
     cc->debug_excp_handler = arm_debug_excp_handler;
 
diff --git a/target-arm/cpu64.c b/target-arm/cpu64.c
index cc177bb9f6..c847513b25 100644
--- a/target-arm/cpu64.c
+++ b/target-arm/cpu64.c
@@ -287,6 +287,11 @@ static void aarch64_cpu_set_pc(CPUState *cs, vaddr value)
     }
 }
 
+static gchar *aarch64_gdb_arch_name(CPUState *cs)
+{
+    return g_strdup("aarch64");
+}
+
 static void aarch64_cpu_class_init(ObjectClass *oc, void *data)
 {
     CPUClass *cc = CPU_CLASS(oc);
@@ -297,6 +302,7 @@ static void aarch64_cpu_class_init(ObjectClass *oc, void *data)
     cc->gdb_write_register = aarch64_cpu_gdb_write_register;
     cc->gdb_num_core_regs = 34;
     cc->gdb_core_xml_file = "aarch64-core.xml";
+    cc->gdb_arch_name = aarch64_gdb_arch_name;
 }
 
 static void aarch64_cpu_register(const ARMCPUInfo *info)