gdbstub: move chunks of user code into own files

The process was pretty similar to the softmmu move except we take the
time to split stuff between user.c and user-target.c to avoid as much
target specific compilation as possible. We also start to make use of
our shiny new header scheme so the user-only helpers can be included
without the rest of the exec/gsbstub.h cruft.

As before we split some functions into user and softmmu versions

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

Message-Id: <20230302190846.2593720-12-alex.bennee@linaro.org>
Message-Id: <20230303025805.625589-12-richard.henderson@linaro.org>

1 files changed, 90 insertions, 0 deletions

diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c
index 86a94f1519..a6c196ade6 100644
--- a/gdbstub/softmmu.c
+++ b/gdbstub/softmmu.c
@@ -435,6 +435,96 @@ void gdb_handle_query_rcmd(GArray *params, void *user_ctx)
 }
 
 /*
+ * Execution state helpers
+ */
+
+void gdb_continue(void)
+{
+    if (!runstate_needs_reset()) {
+        trace_gdbstub_op_continue();
+        vm_start();
+    }
+}
+
+/*
+ * Resume execution, per CPU actions.
+ */
+int gdb_continue_partial(char *newstates)
+{
+    CPUState *cpu;
+    int res = 0;
+    int flag = 0;
+
+    if (!runstate_needs_reset()) {
+        bool step_requested = false;
+        CPU_FOREACH(cpu) {
+            if (newstates[cpu->cpu_index] == 's') {
+                step_requested = true;
+                break;
+            }
+        }
+
+        if (vm_prepare_start(step_requested)) {
+            return 0;
+        }
+
+        CPU_FOREACH(cpu) {
+            switch (newstates[cpu->cpu_index]) {
+            case 0:
+            case 1:
+                break; /* nothing to do here */
+            case 's':
+                trace_gdbstub_op_stepping(cpu->cpu_index);
+                cpu_single_step(cpu, gdbserver_state.sstep_flags);
+                cpu_resume(cpu);
+                flag = 1;
+                break;
+            case 'c':
+                trace_gdbstub_op_continue_cpu(cpu->cpu_index);
+                cpu_resume(cpu);
+                flag = 1;
+                break;
+            default:
+                res = -1;
+                break;
+            }
+        }
+    }
+    if (flag) {
+        qemu_clock_enable(QEMU_CLOCK_VIRTUAL, true);
+    }
+    return res;
+}
+
+/*
+ * Signal Handling - in system mode we only need SIGINT and SIGTRAP; other
+ * signals are not yet supported.
+ */
+
+enum {
+    TARGET_SIGINT = 2,
+    TARGET_SIGTRAP = 5
+};
+
+static int gdb_signal_table[] = {
+    -1,
+    -1,
+    TARGET_SIGINT,
+    -1,
+    -1,
+    TARGET_SIGTRAP
+};
+
+int gdb_signal_to_target(int sig)
+{
+    if (sig < ARRAY_SIZE(gdb_signal_table)) {
+        return gdb_signal_table[sig];
+    } else {
+        return -1;
+    }
+}
+
+/*
  * Break/Watch point helpers
  */