[PULL 09/22] gdbstub: Use GDBFeature for GDBRegisterState

["Alex Bennée" <alex.bennee@linaro.org>]

From: Akihiko Odaki <akihiko.odaki@daynix.com>

Simplify GDBRegisterState by replacing num_regs and xml members with
one member that points to GDBFeature.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240103173349.398526-31-alex.bennee@linaro.org>
Message-Id: <20231213-gdb-v17-5-777047380591@daynix.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index 068180c83c7..a80729436b6 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -47,10 +47,9 @@
 
 typedef struct GDBRegisterState {
     int base_reg;
-    int num_regs;
     gdb_get_reg_cb get_reg;
     gdb_set_reg_cb set_reg;
-    const char *xml;
+    const GDBFeature *feature;
 } GDBRegisterState;
 
 GDBState gdbserver_state;
@@ -391,7 +390,7 @@ static const char *get_feature_xml(const char *p, const char **newp,
                     g_ptr_array_add(
                         xml,
                         g_markup_printf_escaped("<xi:include href=\"%s\"/>",
-                                                r->xml));
+                                                r->feature->xmlname));
                 }
             }
             g_ptr_array_add(xml, g_strdup("</target>"));
@@ -513,7 +512,7 @@ static int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg)
     if (cpu->gdb_regs) {
         for (guint i = 0; i < cpu->gdb_regs->len; i++) {
             r = &g_array_index(cpu->gdb_regs, GDBRegisterState, i);
-            if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) {
+            if (r->base_reg <= reg && reg < r->base_reg + r->feature->num_regs) {
                 return r->get_reg(env, buf, reg - r->base_reg);
             }
         }
@@ -534,7 +533,7 @@ static int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg)
     if (cpu->gdb_regs) {
         for (guint i = 0; i < cpu->gdb_regs->len; i++) {
             r =  &g_array_index(cpu->gdb_regs, GDBRegisterState, i);
-            if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) {
+            if (r->base_reg <= reg && reg < r->base_reg + r->feature->num_regs) {
                 return r->set_reg(env, mem_buf, reg - r->base_reg);
             }
         }
@@ -553,7 +552,7 @@ void gdb_register_coprocessor(CPUState *cpu,
         for (i = 0; i < cpu->gdb_regs->len; i++) {
             /* Check for duplicates.  */
             s = &g_array_index(cpu->gdb_regs, GDBRegisterState, i);
-            if (strcmp(s->xml, feature->xmlname) == 0) {
+            if (s->feature == feature) {
                 return;
             }
         }
@@ -565,10 +564,9 @@ void gdb_register_coprocessor(CPUState *cpu,
     g_array_set_size(cpu->gdb_regs, i + 1);
     s = &g_array_index(cpu->gdb_regs, GDBRegisterState, i);
     s->base_reg = cpu->gdb_num_regs;
-    s->num_regs = feature->num_regs;
     s->get_reg = get_reg;
     s->set_reg = set_reg;
-    s->xml = feature->xml;
+    s->feature = feature;
 
     /* Add to end of list.  */
     cpu->gdb_num_regs += feature->num_regs;
-- 
2.39.2