gdbstub: Implement v commands with new infra
Signed-off-by: Jon Doron <arilou@gmail.com> Message-Id: <20190529064148.19856-17-arilou@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
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933f80dd42
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8536ec02fe
168
gdbstub.c
168
gdbstub.c
@ -1822,6 +1822,106 @@ static void handle_step(GdbCmdContext *gdb_ctx, void *user_ctx)
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gdb_continue(gdb_ctx->s);
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}
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static void handle_v_cont_query(GdbCmdContext *gdb_ctx, void *user_ctx)
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{
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put_packet(gdb_ctx->s, "vCont;c;C;s;S");
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}
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static void handle_v_cont(GdbCmdContext *gdb_ctx, void *user_ctx)
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{
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int res;
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if (!gdb_ctx->num_params) {
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return;
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}
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res = gdb_handle_vcont(gdb_ctx->s, gdb_ctx->params[0].data);
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if ((res == -EINVAL) || (res == -ERANGE)) {
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put_packet(gdb_ctx->s, "E22");
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} else if (res) {
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put_packet(gdb_ctx->s, "");
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}
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}
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static void handle_v_attach(GdbCmdContext *gdb_ctx, void *user_ctx)
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{
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GDBProcess *process;
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CPUState *cpu;
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char thread_id[16];
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pstrcpy(gdb_ctx->str_buf, sizeof(gdb_ctx->str_buf), "E22");
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if (!gdb_ctx->num_params) {
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goto cleanup;
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}
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process = gdb_get_process(gdb_ctx->s, gdb_ctx->params[0].val_ul);
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if (!process) {
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goto cleanup;
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}
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cpu = get_first_cpu_in_process(gdb_ctx->s, process);
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if (!cpu) {
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goto cleanup;
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}
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process->attached = true;
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gdb_ctx->s->g_cpu = cpu;
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gdb_ctx->s->c_cpu = cpu;
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gdb_fmt_thread_id(gdb_ctx->s, cpu, thread_id, sizeof(thread_id));
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snprintf(gdb_ctx->str_buf, sizeof(gdb_ctx->str_buf), "T%02xthread:%s;",
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GDB_SIGNAL_TRAP, thread_id);
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cleanup:
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put_packet(gdb_ctx->s, gdb_ctx->str_buf);
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}
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static void handle_v_kill(GdbCmdContext *gdb_ctx, void *user_ctx)
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{
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/* Kill the target */
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put_packet(gdb_ctx->s, "OK");
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error_report("QEMU: Terminated via GDBstub");
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exit(0);
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}
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static GdbCmdParseEntry gdb_v_commands_table[] = {
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/* Order is important if has same prefix */
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{
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.handler = handle_v_cont_query,
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.cmd = "Cont?",
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.cmd_startswith = 1
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},
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{
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.handler = handle_v_cont,
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.cmd = "Cont",
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.cmd_startswith = 1,
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.schema = "s0"
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},
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{
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.handler = handle_v_attach,
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.cmd = "Attach;",
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.cmd_startswith = 1,
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.schema = "l0"
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},
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{
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.handler = handle_v_kill,
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.cmd = "Kill;",
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.cmd_startswith = 1
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},
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};
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static void handle_v_commands(GdbCmdContext *gdb_ctx, void *user_ctx)
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{
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if (!gdb_ctx->num_params) {
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return;
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}
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if (process_string_cmd(gdb_ctx->s, NULL, gdb_ctx->params[0].data,
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gdb_v_commands_table,
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ARRAY_SIZE(gdb_v_commands_table))) {
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put_packet(gdb_ctx->s, "");
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}
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}
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static int gdb_handle_packet(GDBState *s, const char *line_buf)
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{
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CPUState *cpu;
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@ -1829,7 +1929,7 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
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CPUClass *cc;
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const char *p;
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uint32_t pid, tid;
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int ch, type, res;
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int ch, type;
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uint8_t mem_buf[MAX_PACKET_LENGTH];
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char buf[sizeof(mem_buf) + 1 /* trailing NUL */];
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char thread_id[16];
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@ -1878,66 +1978,16 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
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}
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break;
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case 'v':
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if (strncmp(p, "Cont", 4) == 0) {
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p += 4;
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if (*p == '?') {
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put_packet(s, "vCont;c;C;s;S");
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break;
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}
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res = gdb_handle_vcont(s, p);
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if (res) {
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if ((res == -EINVAL) || (res == -ERANGE)) {
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put_packet(s, "E22");
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break;
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}
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goto unknown_command;
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{
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static const GdbCmdParseEntry v_cmd_desc = {
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.handler = handle_v_commands,
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.cmd = "v",
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.cmd_startswith = 1,
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.schema = "s0"
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};
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cmd_parser = &v_cmd_desc;
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}
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break;
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} else if (strncmp(p, "Attach;", 7) == 0) {
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unsigned long pid;
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p += 7;
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if (qemu_strtoul(p, &p, 16, &pid)) {
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put_packet(s, "E22");
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break;
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}
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process = gdb_get_process(s, pid);
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if (process == NULL) {
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put_packet(s, "E22");
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break;
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}
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cpu = get_first_cpu_in_process(s, process);
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if (cpu == NULL) {
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/* Refuse to attach an empty process */
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put_packet(s, "E22");
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break;
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}
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process->attached = true;
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s->g_cpu = cpu;
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s->c_cpu = cpu;
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snprintf(buf, sizeof(buf), "T%02xthread:%s;", GDB_SIGNAL_TRAP,
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gdb_fmt_thread_id(s, cpu, thread_id, sizeof(thread_id)));
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put_packet(s, buf);
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break;
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} else if (strncmp(p, "Kill;", 5) == 0) {
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/* Kill the target */
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put_packet(s, "OK");
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error_report("QEMU: Terminated via GDBstub");
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exit(0);
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} else {
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goto unknown_command;
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}
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case 'k':
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/* Kill the target */
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error_report("QEMU: Terminated via GDBstub");
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