2  * gdb server stub - system specific bits
7  * Copyright (c) 2003-2005 Fabrice Bellard
10  * SPDX-License-Identifier: LGPL-2.0-or-later
15 #include "qemu/error-report.h"
21 #include "exec/tb-flush.h"
22 #include "system/accel-ops.h"
31 #include "chardev/char-fe.h"
36 /* System emulation specific state */
53  * Return the GDB index for a given vCPU state.
60     return cpu->cpu_index + 1;  in gdb_get_cpu_index()
94         for (i = 0; i < s->process_num; i++) {  in gdb_chr_event()
95             s->processes[i].attached = !i;  in gdb_chr_event()
98         s->c_cpu = gdb_first_attached_cpu();  in gdb_chr_event()
99         s->g_cpu = s->c_cpu;  in gdb_chr_event()
104     default:  in gdb_chr_event()
110  * In system-mode we stop the VM and wait to send the syscall packet
114  * state, which can cause packets to be dropped and state transition
123 static void gdb_vm_state_change(void *opaque, bool running, RunState state)  in gdb_vm_state_change()  argument
131     if (running || gdbserver_state.state == RS_INACTIVE) {  in gdb_vm_state_change()
151     switch (state) {  in gdb_vm_state_change()
153         if (cpu->watchpoint_hit) {  in gdb_vm_state_change()
154             switch (cpu->watchpoint_hit->flags & BP_MEM_ACCESS) {  in gdb_vm_state_change()
161             default:  in gdb_vm_state_change()
167                                          cpu->watchpoint_hit->vaddr);  in gdb_vm_state_change()
169                             GDB_SIGNAL_TRAP, tid->str, type,  in gdb_vm_state_change()
170                             cpu->watchpoint_hit->vaddr);  in gdb_vm_state_change()
171             cpu->watchpoint_hit = NULL;  in gdb_vm_state_change()
207     default:  in gdb_vm_state_change()
208         trace_gdbstub_hit_unknown(state);  in gdb_vm_state_change()
213     g_string_printf(buf, "T%02xthread:%s;", ret, tid->str);  in gdb_vm_state_change()
216     gdb_put_packet(buf->str);  in gdb_vm_state_change()
236     gdb_put_packet(hex_buf->str);  in gdb_monitor_write()
250     cc->internal = true;  in char_gdb_class_init()
251     cc->open = gdb_monitor_open;  in char_gdb_class_init()
252     cc->chr_write = gdb_monitor_write;  in char_gdb_class_init()
255 #define TYPE_CHARDEV_GDB "chardev-gdb"
288         s->processes = g_renew(GDBProcess, s->processes, ++s->process_num);  in find_cpu_clusters()
290         process = &s->processes[s->process_num - 1];  in find_cpu_clusters()
293          * GDB process IDs -1 and 0 are reserved. To avoid subtle errors at  in find_cpu_clusters()
297         assert(cluster->cluster_id != UINT32_MAX);  in find_cpu_clusters()
298         process->pid = cluster->cluster_id + 1;  in find_cpu_clusters()
299         process->attached = false;  in find_cpu_clusters()
300         process->target_xml = NULL;  in find_cpu_clusters()
313     if (pa->pid < pb->pid) {  in pid_order()
314         return -1;  in pid_order()
315     } else if (pa->pid > pb->pid) {  in pid_order()
355     if (cs->len == 0) {  in gdbserver_start()
360     trace_gdbstub_op_start(cs->str);  in gdbserver_start()
362     if (g_strcmp0(cs->str, "none") != 0) {  in gdbserver_start()
363         if (g_str_has_prefix(cs->str, "tcp:")) {  in gdbserver_start()
380         chr = qemu_chr_new_noreplay("gdb", cs->str, true, NULL);  in gdbserver_start()
411     gdbserver_state.state = chr ? RS_IDLE : RS_INACTIVE;  in gdbserver_start()
468     if (cpu->cc->memory_rw_debug) {  in gdb_target_memory_rw_debug()
469         return cpu->cc->memory_rw_debug(cpu, addr, buf, len, is_write);  in gdb_target_memory_rw_debug()
482     return ms->smp.max_cpus;  in gdb_get_max_cpus()
503     if (!params->len) {  in gdb_handle_set_qemu_phy_mem_mode()
508     if (!gdb_get_cmd_param(params, 0)->val_ul) {  in gdb_handle_set_qemu_phy_mem_mode()
521     if (!params->len) {  in gdb_handle_query_rcmd()
526     len = strlen(gdb_get_cmd_param(params, 0)->data);  in gdb_handle_query_rcmd()
532     g_assert(gdbserver_state.mem_buf->len == 0);  in gdb_handle_query_rcmd()
534     gdb_hextomem(gdbserver_state.mem_buf, gdb_get_cmd_param(params, 0)->data, len);  in gdb_handle_query_rcmd()
537                       gdbserver_state.mem_buf->data,  in gdb_handle_query_rcmd()
538                       gdbserver_state.mem_buf->len);  in gdb_handle_query_rcmd()
543  * Execution state helpers
571             if (newstates[cpu->cpu_index] == 's') {  in gdb_continue_partial()
582             switch (newstates[cpu->cpu_index]) {  in gdb_continue_partial()
587                 trace_gdbstub_op_stepping(cpu->cpu_index);  in gdb_continue_partial()
593                 trace_gdbstub_op_continue_cpu(cpu->cpu_index);  in gdb_continue_partial()
597             default:  in gdb_continue_partial()
598                 res = -1;  in gdb_continue_partial()
610  * Signal Handling - in system mode we only need SIGINT and SIGTRAP; other
626     default:  in gdb_signal_to_target()
627         return -1;  in gdb_signal_to_target()
638     if (ops->supports_guest_debug) {  in gdb_supports_guest_debug()
639         return ops->supports_guest_debug();  in gdb_supports_guest_debug()
647     if (ops->insert_breakpoint) {  in gdb_breakpoint_insert()
648         return ops->insert_breakpoint(cs, type, addr, len);  in gdb_breakpoint_insert()
650     return -ENOSYS;  in gdb_breakpoint_insert()
656     if (ops->remove_breakpoint) {  in gdb_breakpoint_remove()
657         return ops->remove_breakpoint(cs, type, addr, len);  in gdb_breakpoint_remove()
659     return -ENOSYS;  in gdb_breakpoint_remove()
665     if (ops->remove_all_breakpoints) {  in gdb_breakpoint_remove_all()
666         ops->remove_all_breakpoints(cs);  in gdb_breakpoint_remove_all()