gdbstub: move chunk of softmmu functionality to own file

This is mostly code motion but a number of things needed to be done
for this minimal patch set:

  - move shared structures to internals.h
  - splitting some functions into user and softmmu versions
  - fixing a few casting issues to keep softmmu common

More CONFIG_USER_ONLY stuff will be handled in a following patches.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

Message-Id: <20230302190846.2593720-11-alex.bennee@linaro.org>
Message-Id: <20230303025805.625589-11-richard.henderson@linaro.org>

1 files changed, 42 insertions, 1 deletions

diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index cf76627cf7..83989af859 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -17,6 +17,18 @@
  * Shared structures and definitions
  */
 
+enum {
+    GDB_SIGNAL_0 = 0,
+    GDB_SIGNAL_INT = 2,
+    GDB_SIGNAL_QUIT = 3,
+    GDB_SIGNAL_TRAP = 5,
+    GDB_SIGNAL_ABRT = 6,
+    GDB_SIGNAL_ALRM = 14,
+    GDB_SIGNAL_IO = 23,
+    GDB_SIGNAL_XCPU = 24,
+    GDB_SIGNAL_UNKNOWN = 143
+};
+
 typedef struct GDBProcess {
     uint32_t pid;
     bool attached;
@@ -57,6 +69,8 @@ typedef struct GDBState {
     int supported_sstep_flags;
 } GDBState;
 
+/* lives in main gdbstub.c */
+extern GDBState gdbserver_state;
 
 /*
  * Inline utility function, convert from int to hex and back
@@ -101,7 +115,6 @@ CPUState *gdb_first_attached_cpu(void);
 void gdb_append_thread_id(CPUState *cpu, GString *buf);
 int gdb_get_cpu_index(CPUState *cpu);
 
-void gdb_init_gdbserver_state(void);
 void gdb_create_default_process(GDBState *s);
 
 /*
@@ -110,6 +123,34 @@ void gdb_create_default_process(GDBState *s);
 void gdb_put_buffer(const uint8_t *buf, int len);
 
 /*
+ * Command handlers - either softmmu or user only
+ */
+void gdb_init_gdbserver_state(void);
+
+typedef enum GDBThreadIdKind {
+    GDB_ONE_THREAD = 0,
+    GDB_ALL_THREADS,     /* One process, all threads */
+    GDB_ALL_PROCESSES,
+    GDB_READ_THREAD_ERR
+} GDBThreadIdKind;
+
+typedef union GdbCmdVariant {
+    const char *data;
+    uint8_t opcode;
+    unsigned long val_ul;
+    unsigned long long val_ull;
+    struct {
+        GDBThreadIdKind kind;
+        uint32_t pid;
+        uint32_t tid;
+    } thread_id;
+} GdbCmdVariant;
+
+#define get_param(p, i)    (&g_array_index(p, GdbCmdVariant, i))
+
+void gdb_handle_query_rcmd(GArray *params, void *user_ctx); /* softmmu */
+
+/*
  * Break/Watch point support - there is an implementation for softmmu
  * and user mode.
  */