Merge remote-tracking branch 'remotes/armbru/tags/pull-qapi-2020-03-17' into staging

[mirror_qemu.git] / gdbstub.c

diff --git a/gdbstub.c b/gdbstub.c
index db537a712ccd87e79e726cae45c7d38677f73eff..013fb1ac0f1872964c803e0bff5b154c18b04330 100644 (file)
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -319,8 +319,8 @@ static int gdb_signal_to_target (int sig)
 typedef struct GDBRegisterState {
     int base_reg;
     int num_regs;
-    gdb_reg_cb get_reg;
-    gdb_reg_cb set_reg;
+    gdb_get_reg_cb get_reg;
+    gdb_set_reg_cb set_reg;
     const char *xml;
     struct GDBRegisterState *next;
 } GDBRegisterState;
@@ -351,8 +351,7 @@ typedef struct GDBState {
     int line_buf_index;
     int line_sum; /* running checksum */
     int line_csum; /* checksum at the end of the packet */
-    uint8_t last_packet[MAX_PACKET_LENGTH + 4];
-    int last_packet_len;
+    GByteArray *last_packet;
     int signal;
 #ifdef CONFIG_USER_ONLY
     int fd;
@@ -384,6 +383,7 @@ static void init_gdbserver_state(void)
     gdbserver_state.init = true;
     gdbserver_state.str_buf = g_string_new(NULL);
     gdbserver_state.mem_buf = g_byte_array_sized_new(MAX_PACKET_LENGTH);
+    gdbserver_state.last_packet = g_byte_array_sized_new(MAX_PACKET_LENGTH + 4);
 }
 
 #ifndef CONFIG_USER_ONLY
@@ -626,28 +626,29 @@ static void hexdump(const char *buf, int len,
 static int put_packet_binary(const char *buf, int len, bool dump)
 {
     int csum, i;
-    uint8_t *p;
-    uint8_t *ps = &gdbserver_state.last_packet[0];
+    uint8_t footer[3];
 
     if (dump && trace_event_get_state_backends(TRACE_GDBSTUB_IO_BINARYREPLY)) {
         hexdump(buf, len, trace_gdbstub_io_binaryreply);
     }
 
     for(;;) {
-        p = ps;
-        *(p++) = '$';
-        memcpy(p, buf, len);
-        p += len;
+        g_byte_array_set_size(gdbserver_state.last_packet, 0);
+        g_byte_array_append(gdbserver_state.last_packet,
+                            (const uint8_t *) "$", 1);
+        g_byte_array_append(gdbserver_state.last_packet,
+                            (const uint8_t *) buf, len);
         csum = 0;
         for(i = 0; i < len; i++) {
             csum += buf[i];
         }
-        *(p++) = '#';
-        *(p++) = tohex((csum >> 4) & 0xf);
-        *(p++) = tohex((csum) & 0xf);
+        footer[0] = '#';
+        footer[1] = tohex((csum >> 4) & 0xf);
+        footer[2] = tohex((csum) & 0xf);
+        g_byte_array_append(gdbserver_state.last_packet, footer, 3);
 
-        gdbserver_state.last_packet_len = p - ps;
-        put_buffer(ps, gdbserver_state.last_packet_len);
+        put_buffer(gdbserver_state.last_packet->data,
+                   gdbserver_state.last_packet->len);
 
 #ifdef CONFIG_USER_ONLY
         i = get_char();
@@ -905,19 +906,19 @@ static const char *get_feature_xml(const char *p, const char **newp,
     return name ? xml_builtin[i][1] : NULL;
 }
 
-static int gdb_read_register(CPUState *cpu, uint8_t *mem_buf, int reg)
+static int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg)
 {
     CPUClass *cc = CPU_GET_CLASS(cpu);
     CPUArchState *env = cpu->env_ptr;
     GDBRegisterState *r;
 
     if (reg < cc->gdb_num_core_regs) {
-        return cc->gdb_read_register(cpu, mem_buf, reg);
+        return cc->gdb_read_register(cpu, buf, reg);
     }
 
     for (r = cpu->gdb_regs; r; r = r->next) {
         if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) {
-            return r->get_reg(env, mem_buf, reg - r->base_reg);
+            return r->get_reg(env, buf, reg - r->base_reg);
         }
     }
     return 0;
@@ -948,7 +949,7 @@ static int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg)
  */
 
 void gdb_register_coprocessor(CPUState *cpu,
-                              gdb_reg_cb get_reg, gdb_reg_cb set_reg,
+                              gdb_get_reg_cb get_reg, gdb_set_reg_cb set_reg,
                               int num_regs, const char *xml, int g_pos)
 {
     GDBRegisterState *s;
@@ -1739,7 +1740,7 @@ static void handle_get_reg(GdbCmdContext *gdb_ctx, void *user_ctx)
     }
 
     reg_size = gdb_read_register(gdbserver_state.g_cpu,
-                                 gdbserver_state.mem_buf->data,
+                                 gdbserver_state.mem_buf,
                                  gdb_ctx->params[0].val_ull);
     if (!reg_size) {
         put_packet("E14");
@@ -1832,14 +1833,14 @@ static void handle_read_all_regs(GdbCmdContext *gdb_ctx, void *user_ctx)
     target_ulong addr, len;
 
     cpu_synchronize_state(gdbserver_state.g_cpu);
+    g_byte_array_set_size(gdbserver_state.mem_buf, 0);
     len = 0;
     for (addr = 0; addr < gdbserver_state.g_cpu->gdb_num_g_regs; addr++) {
         len += gdb_read_register(gdbserver_state.g_cpu,
-                                 gdbserver_state.mem_buf->data + len,
+                                 gdbserver_state.mem_buf,
                                  addr);
     }
-    /* FIXME: This is after the fact sizing */
-    g_byte_array_set_size(gdbserver_state.mem_buf, len);
+    g_assert(len == gdbserver_state.mem_buf->len);
 
     memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data, len);
     put_strbuf();
@@ -2129,7 +2130,7 @@ static void handle_query_supported(GdbCmdContext *gdb_ctx, void *user_ctx)
         gdbserver_state.multiprocess = true;
     }
 
-    g_string_append(gdbserver_state.str_buf, ";multiprocess+");
+    g_string_append(gdbserver_state.str_buf, ";vContSupported+;multiprocess+");
     put_strbuf();
 }
 
@@ -2812,20 +2813,22 @@ static void gdb_read_byte(uint8_t ch)
     uint8_t reply;
 
 #ifndef CONFIG_USER_ONLY
-    if (gdbserver_state.last_packet_len) {
+    if (gdbserver_state.last_packet->len) {
         /* Waiting for a response to the last packet.  If we see the start
            of a new command then abandon the previous response.  */
         if (ch == '-') {
             trace_gdbstub_err_got_nack();
-            put_buffer((uint8_t *)gdbserver_state.last_packet, gdbserver_state.last_packet_len);
+            put_buffer(gdbserver_state.last_packet->data,
+                       gdbserver_state.last_packet->len);
         } else if (ch == '+') {
             trace_gdbstub_io_got_ack();
         } else {
             trace_gdbstub_io_got_unexpected(ch);
         }
 
-        if (ch == '+' || ch == '$')
-            gdbserver_state.last_packet_len = 0;
+        if (ch == '+' || ch == '$') {
+            g_byte_array_set_size(gdbserver_state.last_packet, 0);
+        }
         if (ch != '$')
             return;
     }
@@ -3197,28 +3200,11 @@ static void gdb_chr_event(void *opaque, QEMUChrEvent event)
     }
 }
 
-static void gdb_monitor_output(const char *msg, int len)
-{
-    g_autoptr(GString) buf = g_string_new("O");
-    memtohex(buf, (uint8_t *)msg, len);
-    put_packet(buf->str);
-}
-
 static int gdb_monitor_write(Chardev *chr, const uint8_t *buf, int len)
 {
-    const char *p = (const char *)buf;
-    int max_sz;
-
-    max_sz = (sizeof(gdbserver_state.last_packet) - 2) / 2;
-    for (;;) {
-        if (len <= max_sz) {
-            gdb_monitor_output(p, len);
-            break;
-        }
-        gdb_monitor_output(p, max_sz);
-        p += max_sz;
-        len -= max_sz;
-    }
+    g_autoptr(GString) hex_buf = g_string_new("O");
+    memtohex(hex_buf, buf, len);
+    put_packet(hex_buf->str);
     return len;
 }