[Qemu-devel] [PATCH v8 15/27] gdbstub: Implement file io (F pkt) with new infra

[Jon Doron <arilou@gmail.com>]

Signed-off-by: Jon Doron <arilou@gmail.com>
---
 gdbstub.c | 62 +++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 40 insertions(+), 22 deletions(-)

diff --git a/gdbstub.c b/gdbstub.c
index 3478ac778d..9fe130f30d 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -1772,6 +1772,39 @@ static void handle_read_all_regs(GdbCmdContext *gdb_ctx, void *user_ctx)
     put_packet(gdb_ctx->s, gdb_ctx->str_buf);
 }
 
+static void handle_file_io(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+    int num_syscall_params;
+    GdbCmdVariant syscall_params[3] = {};
+
+    if (!gdb_ctx->num_params) {
+        return;
+    }
+
+    if (cmd_parse_params(gdb_ctx->params[0].data, "L,L,o0", syscall_params,
+                         &num_syscall_params)) {
+        return;
+    }
+
+    if (!num_syscall_params) {
+        return;
+    }
+
+    if (gdb_ctx->s->current_syscall_cb) {
+        gdb_ctx->s->current_syscall_cb(gdb_ctx->s->c_cpu,
+                                       (target_ulong)syscall_params[0].val_ull,
+                                       (target_ulong)syscall_params[1].val_ull);
+        gdb_ctx->s->current_syscall_cb = NULL;
+    }
+
+    if (syscall_params[2].opcode == (uint8_t)'C') {
+        put_packet(gdb_ctx->s, "T02");
+        return;
+    }
+
+    gdb_continue(gdb_ctx->s);
+}
+
 static int gdb_handle_packet(GDBState *s, const char *line_buf)
 {
     CPUState *cpu;
@@ -1913,28 +1946,13 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
         return RS_IDLE;
     case 'F':
         {
-            target_ulong ret;
-            target_ulong err;
-
-            ret = strtoull(p, (char **)&p, 16);
-            if (*p == ',') {
-                p++;
-                err = strtoull(p, (char **)&p, 16);
-            } else {
-                err = 0;
-            }
-            if (*p == ',')
-                p++;
-            type = *p;
-            if (s->current_syscall_cb) {
-                s->current_syscall_cb(s->c_cpu, ret, err);
-                s->current_syscall_cb = NULL;
-            }
-            if (type == 'C') {
-                put_packet(s, "T02");
-            } else {
-                gdb_continue(s);
-            }
+            static const GdbCmdParseEntry file_io_cmd_desc = {
+                .handler = handle_file_io,
+                .cmd = "F",
+                .cmd_startswith = 1,
+                .schema = "s0"
+            };
+            cmd_parser = &file_io_cmd_desc;
         }
         break;
     case 'g':
-- 
2.20.1