diff --git a/.vscode/settings.json b/.vscode/settings.json
index 0c4466e..efb228b 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -2,6 +2,7 @@
"files.associations": {
"BUILD": "bazel",
"*.inc": "cpp",
- "stdio.h": "c"
+ "stdio.h": "c",
+ "cstdlib": "c"
}
}
\ No newline at end of file
diff --git a/backup/commands.h b/backup/commands.h
new file mode 100644
index 0000000..bff3674
--- /dev/null
+++ b/backup/commands.h
@@ -0,0 +1,108 @@
+#ifndef GDBSTUB_COMMANDS_H
+#define GDBSTUB_COMMANDS_H
+
+typedef void (*GdbCmdHandler)(GArray *params, void *user_ctx);
+
+typedef enum GDBThreadIdKind {
+ GDB_ONE_THREAD = 0,
+ GDB_ALL_THREADS, /* One process, all threads */
+ GDB_ALL_PROCESSES,
+ GDB_READ_THREAD_ERR
+} GDBThreadIdKind;
+
+typedef union GdbCmdVariant {
+ const char *data;
+ uint8_t opcode;
+ unsigned long val_ul;
+ unsigned long long val_ull;
+ struct {
+ GDBThreadIdKind kind;
+ uint32_t pid;
+ uint32_t tid;
+ } thread_id;
+} GdbCmdVariant;
+
+#define gdb_get_cmd_param(p, i) (&g_array_index(p, GdbCmdVariant, i))
+
+/**
+ * typedef GdbCmdParseEntry - gdb command parser
+ *
+ * This structure keeps the information necessary to match a gdb command,
+ * parse it (extract its parameters), and select the correct handler for it.
+ *
+ * @cmd: The command to be matched
+ * @cmd_startswith: If true, @cmd is compared using startswith
+ * @schema: Each schema for the command parameter entry consists of 2 chars,
+ * the first char represents the parameter type handling the second char
+ * represents the delimiter for the next parameter.
+ *
+ * Currently supported schema types:
+ * 'l' -> unsigned long (stored in .val_ul)
+ * 'L' -> unsigned long long (stored in .val_ull)
+ * 's' -> string (stored in .data)
+ * 'o' -> single char (stored in .opcode)
+ * 't' -> thread id (stored in .thread_id)
+ * '?' -> skip according to delimiter
+ *
+ * Currently supported delimiters:
+ * '?' -> Stop at any delimiter (",;:=\0")
+ * '0' -> Stop at "\0"
+ * '.' -> Skip 1 char unless reached "\0"
+ * Any other value is treated as the delimiter value itself
+ *
+ * @allow_stop_reply: True iff the gdbstub can respond to this command with a
+ * "stop reply" packet. The list of commands that accept such response is
+ * defined at the GDB Remote Serial Protocol documentation. See:
+ * https://sourceware.org/gdb/onlinedocs/gdb/Stop-Reply-Packets.html#Stop-Reply-Packets.
+ *
+ * @need_cpu_context: Pass current CPU context to command handler via user_ctx.
+ */
+typedef struct GdbCmdParseEntry {
+ GdbCmdHandler handler;
+ const char *cmd;
+ bool cmd_startswith;
+ const char *schema;
+ bool allow_stop_reply;
+ bool need_cpu_context;
+} GdbCmdParseEntry;
+
+/**
+ * gdb_put_packet() - put string into gdb server's buffer so it is sent
+ * to the client
+ */
+int gdb_put_packet(const char *buf);
+
+/**
+ * gdb_extend_query_table() - Extend query table.
+ * @table: GPtrArray of GdbCmdParseEntry entries.
+ *
+ * The caller should free @table afterwards
+ */
+void gdb_extend_query_table(GPtrArray *table);
+
+/**
+ * gdb_extend_set_table() - Extend set table.
+ * @table: GPtrArray of GdbCmdParseEntry entries.
+ *
+ * The caller should free @table afterwards
+ */
+void gdb_extend_set_table(GPtrArray *table);
+
+/**
+ * gdb_extend_qsupported_features() - Extend the qSupported features string.
+ * @qsupported_features: The additional qSupported feature(s) string. The string
+ * should start with a semicolon and, if there are more than one feature, the
+ * features should be separate by a semicolon.
+ *
+ * The caller should free @qsupported_features afterwards if
+ * dynamically allocated.
+ */
+void gdb_extend_qsupported_features(char *qsupported_features);
+
+/**
+ * Convert a hex string to bytes. Conversion is done per byte, so 2 hex digits
+ * are converted to 1 byte. Invalid hex digits are treated as 0 digits.
+ */
+void gdb_hextomem(GByteArray *mem, const char *buf, int len);
+
+#endif /* GDBSTUB_COMMANDS_H */
diff --git a/backup/enums.h b/backup/enums.h
new file mode 100644
index 0000000..c4d54a1
--- /dev/null
+++ b/backup/enums.h
@@ -0,0 +1,21 @@
+/*
+ * gdbstub enums
+ *
+ * Copyright (c) 2024 Linaro Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef GDBSTUB_ENUMS_H
+#define GDBSTUB_ENUMS_H
+
+#define DEFAULT_GDBSTUB_PORT "1234"
+
+/* GDB breakpoint/watchpoint types */
+#define GDB_BREAKPOINT_SW 0
+#define GDB_BREAKPOINT_HW 1
+#define GDB_WATCHPOINT_WRITE 2
+#define GDB_WATCHPOINT_READ 3
+#define GDB_WATCHPOINT_ACCESS 4
+
+#endif /* GDBSTUB_ENUMS_H */
diff --git a/backup/gdbstub.c b/backup/gdbstub.c
new file mode 100644
index 0000000..dd5fb56
--- /dev/null
+++ b/backup/gdbstub.c
@@ -0,0 +1,2519 @@
+/*
+ * gdb server stub
+ *
+ * This implements a subset of the remote protocol as described in:
+ *
+ * https://sourceware.org/gdb/onlinedocs/gdb/Remote-Protocol.html
+ *
+ * Copyright (c) 2003-2005 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see .
+ *
+ * SPDX-License-Identifier: LGPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/ctype.h"
+#include "qemu/cutils.h"
+#include "qemu/module.h"
+#include "qemu/error-report.h"
+#include "qemu/target-info.h"
+#include "trace.h"
+#include "exec/gdbstub.h"
+#include "gdbstub/commands.h"
+#include "gdbstub/syscalls.h"
+#ifdef CONFIG_USER_ONLY
+#include "accel/tcg/vcpu-state.h"
+#include "gdbstub/user.h"
+#else
+#include "hw/cpu/cluster.h"
+#include "hw/boards.h"
+#endif
+#include "hw/core/cpu.h"
+
+#include "system/hw_accel.h"
+#include "system/runstate.h"
+#include "exec/replay-core.h"
+#include "exec/hwaddr.h"
+
+#include "internals.h"
+
+typedef struct GDBRegisterState {
+ int base_reg;
+ gdb_get_reg_cb get_reg;
+ gdb_set_reg_cb set_reg;
+ const GDBFeature *feature;
+} GDBRegisterState;
+
+GDBState gdbserver_state;
+
+void gdb_init_gdbserver_state(void)
+{
+ g_assert(!gdbserver_state.init);
+ memset(&gdbserver_state, 0, sizeof(GDBState));
+ 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);
+
+ /*
+ * What single-step modes are supported is accelerator dependent.
+ * By default try to use no IRQs and no timers while single
+ * stepping so as to make single stepping like a typical ICE HW step.
+ */
+ gdbserver_state.supported_sstep_flags = accel_supported_gdbstub_sstep_flags();
+ gdbserver_state.sstep_flags = SSTEP_ENABLE | SSTEP_NOIRQ | SSTEP_NOTIMER;
+ gdbserver_state.sstep_flags &= gdbserver_state.supported_sstep_flags;
+}
+
+/* writes 2*len+1 bytes in buf */
+void gdb_memtohex(GString *buf, const uint8_t *mem, int len)
+{
+ int i, c;
+ for(i = 0; i < len; i++) {
+ c = mem[i];
+ g_string_append_c(buf, tohex(c >> 4));
+ g_string_append_c(buf, tohex(c & 0xf));
+ }
+ g_string_append_c(buf, '\0');
+}
+
+void gdb_hextomem(GByteArray *mem, const char *buf, int len)
+{
+ int i;
+
+ for(i = 0; i < len; i++) {
+ guint8 byte = fromhex(buf[0]) << 4 | fromhex(buf[1]);
+ g_byte_array_append(mem, &byte, 1);
+ buf += 2;
+ }
+}
+
+static void hexdump(const char *buf, int len,
+ void (*trace_fn)(size_t ofs, char const *text))
+{
+ char line_buffer[3 * 16 + 4 + 16 + 1];
+
+ size_t i;
+ for (i = 0; i < len || (i & 0xF); ++i) {
+ size_t byte_ofs = i & 15;
+
+ if (byte_ofs == 0) {
+ memset(line_buffer, ' ', 3 * 16 + 4 + 16);
+ line_buffer[3 * 16 + 4 + 16] = 0;
+ }
+
+ size_t col_group = (i >> 2) & 3;
+ size_t hex_col = byte_ofs * 3 + col_group;
+ size_t txt_col = 3 * 16 + 4 + byte_ofs;
+
+ if (i < len) {
+ char value = buf[i];
+
+ line_buffer[hex_col + 0] = tohex((value >> 4) & 0xF);
+ line_buffer[hex_col + 1] = tohex((value >> 0) & 0xF);
+ line_buffer[txt_col + 0] = (value >= ' ' && value < 127)
+ ? value
+ : '.';
+ }
+
+ if (byte_ofs == 0xF)
+ trace_fn(i & -16, line_buffer);
+ }
+}
+
+/* return -1 if error, 0 if OK */
+int gdb_put_packet_binary(const char *buf, int len, bool dump)
+{
+ int csum, i;
+ uint8_t footer[3];
+
+ if (dump && trace_event_get_state_backends(TRACE_GDBSTUB_IO_BINARYREPLY)) {
+ hexdump(buf, len, trace_gdbstub_io_binaryreply);
+ }
+
+ for(;;) {
+ g_byte_array_set_size(gdbserver_state.last_packet, 0);
+ g_byte_array_append(gdbserver_state.last_packet,
+ (const uint8_t *) "$", 1);
+ g_byte_array_append(gdbserver_state.last_packet,
+ (const uint8_t *) buf, len);
+ csum = 0;
+ for(i = 0; i < len; i++) {
+ csum += buf[i];
+ }
+ footer[0] = '#';
+ footer[1] = tohex((csum >> 4) & 0xf);
+ footer[2] = tohex((csum) & 0xf);
+ g_byte_array_append(gdbserver_state.last_packet, footer, 3);
+
+ gdb_put_buffer(gdbserver_state.last_packet->data,
+ gdbserver_state.last_packet->len);
+
+ if (gdb_got_immediate_ack()) {
+ break;
+ }
+ }
+ return 0;
+}
+
+/* return -1 if error, 0 if OK */
+int gdb_put_packet(const char *buf)
+{
+ trace_gdbstub_io_reply(buf);
+
+ return gdb_put_packet_binary(buf, strlen(buf), false);
+}
+
+void gdb_put_strbuf(void)
+{
+ gdb_put_packet(gdbserver_state.str_buf->str);
+}
+
+/* Encode data using the encoding for 'x' packets. */
+void gdb_memtox(GString *buf, const char *mem, int len)
+{
+ char c;
+
+ while (len--) {
+ c = *(mem++);
+ switch (c) {
+ case '#': case '$': case '*': case '}':
+ g_string_append_c(buf, '}');
+ g_string_append_c(buf, c ^ 0x20);
+ break;
+ default:
+ g_string_append_c(buf, c);
+ break;
+ }
+ }
+}
+
+static uint32_t gdb_get_cpu_pid(CPUState *cpu)
+{
+#ifdef CONFIG_USER_ONLY
+ return getpid();
+#else
+ if (cpu->cluster_index == UNASSIGNED_CLUSTER_INDEX) {
+ /* Return the default process' PID */
+ int index = gdbserver_state.process_num - 1;
+ return gdbserver_state.processes[index].pid;
+ }
+ return cpu->cluster_index + 1;
+#endif
+}
+
+GDBProcess *gdb_get_process(uint32_t pid)
+{
+ int i;
+
+ if (!pid) {
+ /* 0 means any process, we take the first one */
+ return &gdbserver_state.processes[0];
+ }
+
+ for (i = 0; i < gdbserver_state.process_num; i++) {
+ if (gdbserver_state.processes[i].pid == pid) {
+ return &gdbserver_state.processes[i];
+ }
+ }
+
+ return NULL;
+}
+
+static GDBProcess *gdb_get_cpu_process(CPUState *cpu)
+{
+ return gdb_get_process(gdb_get_cpu_pid(cpu));
+}
+
+static CPUState *find_cpu(uint32_t thread_id)
+{
+ CPUState *cpu;
+
+ CPU_FOREACH(cpu) {
+ if (gdb_get_cpu_index(cpu) == thread_id) {
+ return cpu;
+ }
+ }
+
+ return NULL;
+}
+
+CPUState *gdb_get_first_cpu_in_process(GDBProcess *process)
+{
+ CPUState *cpu;
+
+ CPU_FOREACH(cpu) {
+ if (gdb_get_cpu_pid(cpu) == process->pid) {
+ return cpu;
+ }
+ }
+
+ return NULL;
+}
+
+static CPUState *gdb_next_cpu_in_process(CPUState *cpu)
+{
+ uint32_t pid = gdb_get_cpu_pid(cpu);
+ cpu = CPU_NEXT(cpu);
+
+ while (cpu) {
+ if (gdb_get_cpu_pid(cpu) == pid) {
+ break;
+ }
+
+ cpu = CPU_NEXT(cpu);
+ }
+
+ return cpu;
+}
+
+/* Return the cpu following @cpu, while ignoring unattached processes. */
+static CPUState *gdb_next_attached_cpu(CPUState *cpu)
+{
+ cpu = CPU_NEXT(cpu);
+
+ while (cpu) {
+ if (gdb_get_cpu_process(cpu)->attached) {
+ break;
+ }
+
+ cpu = CPU_NEXT(cpu);
+ }
+
+ return cpu;
+}
+
+/* Return the first attached cpu */
+CPUState *gdb_first_attached_cpu(void)
+{
+ CPUState *cpu = first_cpu;
+ GDBProcess *process = gdb_get_cpu_process(cpu);
+
+ if (!process->attached) {
+ return gdb_next_attached_cpu(cpu);
+ }
+
+ return cpu;
+}
+
+static CPUState *gdb_get_cpu(uint32_t pid, uint32_t tid)
+{
+ GDBProcess *process;
+ CPUState *cpu;
+
+ if (!pid && !tid) {
+ /* 0 means any process/thread, we take the first attached one */
+ return gdb_first_attached_cpu();
+ } else if (pid && !tid) {
+ /* any thread in a specific process */
+ process = gdb_get_process(pid);
+
+ if (process == NULL) {
+ return NULL;
+ }
+
+ if (!process->attached) {
+ return NULL;
+ }
+
+ return gdb_get_first_cpu_in_process(process);
+ } else {
+ /* a specific thread */
+ cpu = find_cpu(tid);
+
+ if (cpu == NULL) {
+ return NULL;
+ }
+
+ process = gdb_get_cpu_process(cpu);
+
+ if (pid && process->pid != pid) {
+ return NULL;
+ }
+
+ if (!process->attached) {
+ return NULL;
+ }
+
+ return cpu;
+ }
+}
+
+static const char *get_feature_xml(const char *p, const char **newp,
+ GDBProcess *process)
+{
+ CPUState *cpu = gdb_get_first_cpu_in_process(process);
+ GDBRegisterState *r;
+ size_t len;
+
+ /*
+ * qXfer:features:read:ANNEX:OFFSET,LENGTH'
+ * ^p ^newp
+ */
+ char *term = strchr(p, ':');
+ *newp = term + 1;
+ len = term - p;
+
+ /* Is it the main target xml? */
+ if (strncmp(p, "target.xml", len) == 0) {
+ if (!process->target_xml) {
+ g_autoptr(GPtrArray) xml = g_ptr_array_new_with_free_func(g_free);
+
+ g_ptr_array_add(
+ xml,
+ g_strdup(""
+ ""
+ ""));
+
+ if (cpu->cc->gdb_arch_name) {
+ g_ptr_array_add(
+ xml,
+ g_markup_printf_escaped("%s",
+ cpu->cc->gdb_arch_name(cpu)));
+ }
+ for (guint i = 0; i < cpu->gdb_regs->len; i++) {
+ r = &g_array_index(cpu->gdb_regs, GDBRegisterState, i);
+ g_ptr_array_add(
+ xml,
+ g_markup_printf_escaped("",
+ r->feature->xmlname));
+ }
+ g_ptr_array_add(xml, g_strdup(""));
+ g_ptr_array_add(xml, NULL);
+
+ process->target_xml = g_strjoinv(NULL, (void *)xml->pdata);
+ }
+ return process->target_xml;
+ }
+ /* Is it one of the features? */
+ for (guint i = 0; i < cpu->gdb_regs->len; i++) {
+ r = &g_array_index(cpu->gdb_regs, GDBRegisterState, i);
+ if (strncmp(p, r->feature->xmlname, len) == 0) {
+ return r->feature->xml;
+ }
+ }
+
+ /* failed */
+ return NULL;
+}
+
+void gdb_feature_builder_init(GDBFeatureBuilder *builder, GDBFeature *feature,
+ const char *name, const char *xmlname,
+ int base_reg)
+{
+ char *header = g_markup_printf_escaped(
+ ""
+ ""
+ "",
+ name);
+
+ builder->feature = feature;
+ builder->xml = g_ptr_array_new();
+ g_ptr_array_add(builder->xml, header);
+ builder->regs = g_ptr_array_new();
+ builder->base_reg = base_reg;
+ feature->xmlname = xmlname;
+ feature->name = name;
+}
+
+void gdb_feature_builder_append_tag(const GDBFeatureBuilder *builder,
+ const char *format, ...)
+{
+ va_list ap;
+ va_start(ap, format);
+ g_ptr_array_add(builder->xml, g_markup_vprintf_escaped(format, ap));
+ va_end(ap);
+}
+
+void gdb_feature_builder_append_reg(const GDBFeatureBuilder *builder,
+ const char *name,
+ int bitsize,
+ int regnum,
+ const char *type,
+ const char *group)
+{
+ if (builder->regs->len <= regnum) {
+ g_ptr_array_set_size(builder->regs, regnum + 1);
+ }
+
+ builder->regs->pdata[regnum] = (gpointer *)name;
+
+ if (group) {
+ gdb_feature_builder_append_tag(
+ builder,
+ "",
+ name, bitsize, builder->base_reg + regnum, type, group);
+ } else {
+ gdb_feature_builder_append_tag(
+ builder,
+ "",
+ name, bitsize, builder->base_reg + regnum, type);
+ }
+}
+
+void gdb_feature_builder_end(const GDBFeatureBuilder *builder)
+{
+ g_ptr_array_add(builder->xml, (void *)"");
+ g_ptr_array_add(builder->xml, NULL);
+
+ builder->feature->xml = g_strjoinv(NULL, (void *)builder->xml->pdata);
+
+ for (guint i = 0; i < builder->xml->len - 2; i++) {
+ g_free(g_ptr_array_index(builder->xml, i));
+ }
+
+ g_ptr_array_free(builder->xml, TRUE);
+
+ builder->feature->num_regs = builder->regs->len;
+ builder->feature->regs = (void *)g_ptr_array_free(builder->regs, FALSE);
+}
+
+const GDBFeature *gdb_find_static_feature(const char *xmlname)
+{
+ const GDBFeature *feature;
+
+ for (feature = gdb_static_features; feature->xmlname; feature++) {
+ if (!strcmp(feature->xmlname, xmlname)) {
+ return feature;
+ }
+ }
+
+ g_assert_not_reached();
+}
+
+GArray *gdb_get_register_list(CPUState *cpu)
+{
+ GArray *results = g_array_new(true, true, sizeof(GDBRegDesc));
+
+ /* registers are only available once the CPU is initialised */
+ if (!cpu->gdb_regs) {
+ return results;
+ }
+
+ for (int f = 0; f < cpu->gdb_regs->len; f++) {
+ GDBRegisterState *r = &g_array_index(cpu->gdb_regs, GDBRegisterState, f);
+ for (int i = 0; i < r->feature->num_regs; i++) {
+ const char *name = r->feature->regs[i];
+ GDBRegDesc desc = {
+ r->base_reg + i,
+ name,
+ r->feature->name
+ };
+ g_array_append_val(results, desc);
+ }
+ }
+
+ return results;
+}
+
+int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg)
+{
+ GDBRegisterState *r;
+
+ if (reg < cpu->cc->gdb_num_core_regs) {
+ return cpu->cc->gdb_read_register(cpu, buf, reg);
+ }
+
+ for (guint i = 0; i < cpu->gdb_regs->len; i++) {
+ r = &g_array_index(cpu->gdb_regs, GDBRegisterState, i);
+ if (r->base_reg <= reg && reg < r->base_reg + r->feature->num_regs) {
+ return r->get_reg(cpu, buf, reg - r->base_reg);
+ }
+ }
+ return 0;
+}
+
+int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg)
+{
+ GDBRegisterState *r;
+
+ if (reg < cpu->cc->gdb_num_core_regs) {
+ return cpu->cc->gdb_write_register(cpu, mem_buf, reg);
+ }
+
+ for (guint i = 0; i < cpu->gdb_regs->len; i++) {
+ r = &g_array_index(cpu->gdb_regs, GDBRegisterState, i);
+ if (r->base_reg <= reg && reg < r->base_reg + r->feature->num_regs) {
+ return r->set_reg(cpu, mem_buf, reg - r->base_reg);
+ }
+ }
+ return 0;
+}
+
+static void gdb_register_feature(CPUState *cpu, int base_reg,
+ gdb_get_reg_cb get_reg, gdb_set_reg_cb set_reg,
+ const GDBFeature *feature)
+{
+ GDBRegisterState s = {
+ .base_reg = base_reg,
+ .get_reg = get_reg,
+ .set_reg = set_reg,
+ .feature = feature
+ };
+
+ g_array_append_val(cpu->gdb_regs, s);
+}
+
+static const char *gdb_get_core_xml_file(CPUState *cpu)
+{
+ CPUClass *cc = cpu->cc;
+
+ /*
+ * The CPU class can provide the XML filename via a method,
+ * or as a simple fixed string field.
+ */
+ if (cc->gdb_get_core_xml_file) {
+ return cc->gdb_get_core_xml_file(cpu);
+ }
+ return cc->gdb_core_xml_file;
+}
+
+void gdb_init_cpu(CPUState *cpu)
+{
+ CPUClass *cc = cpu->cc;
+ const GDBFeature *feature;
+ const char *xmlfile = gdb_get_core_xml_file(cpu);
+
+ cpu->gdb_regs = g_array_new(false, false, sizeof(GDBRegisterState));
+
+ if (xmlfile) {
+ feature = gdb_find_static_feature(xmlfile);
+ gdb_register_feature(cpu, 0,
+ cc->gdb_read_register, cc->gdb_write_register,
+ feature);
+ cpu->gdb_num_regs = cpu->gdb_num_g_regs = feature->num_regs;
+ }
+
+ if (cc->gdb_num_core_regs) {
+ cpu->gdb_num_regs = cpu->gdb_num_g_regs = cc->gdb_num_core_regs;
+ }
+}
+
+void gdb_register_coprocessor(CPUState *cpu,
+ gdb_get_reg_cb get_reg, gdb_set_reg_cb set_reg,
+ const GDBFeature *feature, int g_pos)
+{
+ GDBRegisterState *s;
+ guint i;
+ int base_reg = cpu->gdb_num_regs;
+
+ for (i = 0; i < cpu->gdb_regs->len; i++) {
+ /* Check for duplicates. */
+ s = &g_array_index(cpu->gdb_regs, GDBRegisterState, i);
+ if (s->feature == feature) {
+ return;
+ }
+ }
+
+ gdb_register_feature(cpu, base_reg, get_reg, set_reg, feature);
+
+ /* Add to end of list. */
+ cpu->gdb_num_regs += feature->num_regs;
+ if (g_pos) {
+ if (g_pos != base_reg) {
+ error_report("Error: Bad gdb register numbering for '%s', "
+ "expected %d got %d", feature->xml, g_pos, base_reg);
+ } else {
+ cpu->gdb_num_g_regs = cpu->gdb_num_regs;
+ }
+ }
+}
+
+void gdb_unregister_coprocessor_all(CPUState *cpu)
+{
+ /*
+ * Safe to nuke everything. GDBRegisterState::xml is static const char so
+ * it won't be freed
+ */
+ g_array_free(cpu->gdb_regs, true);
+
+ cpu->gdb_regs = NULL;
+ cpu->gdb_num_regs = 0;
+ cpu->gdb_num_g_regs = 0;
+}
+
+static void gdb_process_breakpoint_remove_all(GDBProcess *p)
+{
+ CPUState *cpu = gdb_get_first_cpu_in_process(p);
+
+ while (cpu) {
+ gdb_breakpoint_remove_all(cpu);
+ cpu = gdb_next_cpu_in_process(cpu);
+ }
+}
+
+
+static void gdb_set_cpu_pc(vaddr pc)
+{
+ CPUState *cpu = gdbserver_state.c_cpu;
+
+ cpu_synchronize_state(cpu);
+ cpu_set_pc(cpu, pc);
+}
+
+void gdb_append_thread_id(CPUState *cpu, GString *buf)
+{
+ if (gdbserver_state.multiprocess) {
+ g_string_append_printf(buf, "p%02x.%02x",
+ gdb_get_cpu_pid(cpu), gdb_get_cpu_index(cpu));
+ } else {
+ g_string_append_printf(buf, "%02x", gdb_get_cpu_index(cpu));
+ }
+}
+
+static GDBThreadIdKind read_thread_id(const char *buf, const char **end_buf,
+ uint32_t *pid, uint32_t *tid)
+{
+ unsigned long p, t;
+ int ret;
+
+ if (*buf == 'p') {
+ buf++;
+ ret = qemu_strtoul(buf, &buf, 16, &p);
+
+ if (ret) {
+ return GDB_READ_THREAD_ERR;
+ }
+
+ /* Skip '.' */
+ buf++;
+ } else {
+ p = 0;
+ }
+
+ ret = qemu_strtoul(buf, &buf, 16, &t);
+
+ if (ret) {
+ return GDB_READ_THREAD_ERR;
+ }
+
+ *end_buf = buf;
+
+ if (p == -1) {
+ return GDB_ALL_PROCESSES;
+ }
+
+ if (pid) {
+ *pid = p;
+ }
+
+ if (t == -1) {
+ return GDB_ALL_THREADS;
+ }
+
+ if (tid) {
+ *tid = t;
+ }
+
+ return GDB_ONE_THREAD;
+}
+
+/**
+ * gdb_handle_vcont - Parses and handles a vCont packet.
+ * returns -ENOTSUP if a command is unsupported, -EINVAL or -ERANGE if there is
+ * a format error, 0 on success.
+ */
+static int gdb_handle_vcont(const char *p)
+{
+ int res, signal = 0;
+ char cur_action;
+ unsigned long tmp;
+ uint32_t pid, tid;
+ GDBProcess *process;
+ CPUState *cpu;
+ GDBThreadIdKind kind;
+ unsigned int max_cpus = gdb_get_max_cpus();
+ /* uninitialised CPUs stay 0 */
+ g_autofree char *newstates = g_new0(char, max_cpus);
+
+ /* mark valid CPUs with 1 */
+ CPU_FOREACH(cpu) {
+ newstates[cpu->cpu_index] = 1;
+ }
+
+ /*
+ * res keeps track of what error we are returning, with -ENOTSUP meaning
+ * that the command is unknown or unsupported, thus returning an empty
+ * packet, while -EINVAL and -ERANGE cause an E22 packet, due to invalid,
+ * or incorrect parameters passed.
+ */
+ res = 0;
+
+ /*
+ * target_count and last_target keep track of how many CPUs we are going to
+ * step or resume, and a pointer to the state structure of one of them,
+ * respectively
+ */
+ int target_count = 0;
+ CPUState *last_target = NULL;
+
+ while (*p) {
+ if (*p++ != ';') {
+ return -ENOTSUP;
+ }
+
+ cur_action = *p++;
+ if (cur_action == 'C' || cur_action == 'S') {
+ cur_action = qemu_tolower(cur_action);
+ res = qemu_strtoul(p, &p, 16, &tmp);
+ if (res) {
+ return res;
+ }
+ signal = gdb_signal_to_target(tmp);
+ } else if (cur_action != 'c' && cur_action != 's') {
+ /* unknown/invalid/unsupported command */
+ return -ENOTSUP;
+ }
+
+ if (*p == '\0' || *p == ';') {
+ /*
+ * No thread specifier, action is on "all threads". The
+ * specification is unclear regarding the process to act on. We
+ * choose all processes.
+ */
+ kind = GDB_ALL_PROCESSES;
+ } else if (*p++ == ':') {
+ kind = read_thread_id(p, &p, &pid, &tid);
+ } else {
+ return -ENOTSUP;
+ }
+
+ switch (kind) {
+ case GDB_READ_THREAD_ERR:
+ return -EINVAL;
+
+ case GDB_ALL_PROCESSES:
+ cpu = gdb_first_attached_cpu();
+ while (cpu) {
+ if (newstates[cpu->cpu_index] == 1) {
+ newstates[cpu->cpu_index] = cur_action;
+
+ target_count++;
+ last_target = cpu;
+ }
+
+ cpu = gdb_next_attached_cpu(cpu);
+ }
+ break;
+
+ case GDB_ALL_THREADS:
+ process = gdb_get_process(pid);
+
+ if (!process->attached) {
+ return -EINVAL;
+ }
+
+ cpu = gdb_get_first_cpu_in_process(process);
+ while (cpu) {
+ if (newstates[cpu->cpu_index] == 1) {
+ newstates[cpu->cpu_index] = cur_action;
+
+ target_count++;
+ last_target = cpu;
+ }
+
+ cpu = gdb_next_cpu_in_process(cpu);
+ }
+ break;
+
+ case GDB_ONE_THREAD:
+ cpu = gdb_get_cpu(pid, tid);
+
+ /* invalid CPU/thread specified */
+ if (!cpu) {
+ return -EINVAL;
+ }
+
+ /* only use if no previous match occourred */
+ if (newstates[cpu->cpu_index] == 1) {
+ newstates[cpu->cpu_index] = cur_action;
+
+ target_count++;
+ last_target = cpu;
+ }
+ break;
+ }
+ }
+
+ /*
+ * if we're about to resume a specific set of CPUs/threads, make it so that
+ * in case execution gets interrupted, we can send GDB a stop reply with a
+ * correct value. it doesn't really matter which CPU we tell GDB the signal
+ * happened in (VM pauses stop all of them anyway), so long as it is one of
+ * the ones we resumed/single stepped here.
+ */
+ if (target_count > 0) {
+ gdbserver_state.c_cpu = last_target;
+ }
+
+ gdbserver_state.signal = signal;
+ gdb_continue_partial(newstates);
+ return res;
+}
+
+static const char *cmd_next_param(const char *param, const char delimiter)
+{
+ static const char all_delimiters[] = ",;:=";
+ char curr_delimiters[2] = {0};
+ const char *delimiters;
+
+ if (delimiter == '?') {
+ delimiters = all_delimiters;
+ } else if (delimiter == '0') {
+ return strchr(param, '\0');
+ } else if (delimiter == '.' && *param) {
+ return param + 1;
+ } else {
+ curr_delimiters[0] = delimiter;
+ delimiters = curr_delimiters;
+ }
+
+ param += strcspn(param, delimiters);
+ if (*param) {
+ param++;
+ }
+ return param;
+}
+
+static int cmd_parse_params(const char *data, const char *schema,
+ GArray *params)
+{
+ const char *curr_schema, *curr_data;
+
+ g_assert(schema);
+ g_assert(params->len == 0);
+
+ curr_schema = schema;
+ curr_data = data;
+ while (curr_schema[0] && curr_schema[1] && *curr_data) {
+ GdbCmdVariant this_param;
+
+ switch (curr_schema[0]) {
+ case 'l':
+ if (qemu_strtoul(curr_data, &curr_data, 16,
+ &this_param.val_ul)) {
+ return -EINVAL;
+ }
+ curr_data = cmd_next_param(curr_data, curr_schema[1]);
+ g_array_append_val(params, this_param);
+ break;
+ case 'L':
+ if (qemu_strtou64(curr_data, &curr_data, 16,
+ (uint64_t *)&this_param.val_ull)) {
+ return -EINVAL;
+ }
+ curr_data = cmd_next_param(curr_data, curr_schema[1]);
+ g_array_append_val(params, this_param);
+ break;
+ case 's':
+ this_param.data = curr_data;
+ curr_data = cmd_next_param(curr_data, curr_schema[1]);
+ g_array_append_val(params, this_param);
+ break;
+ case 'o':
+ this_param.opcode = *(uint8_t *)curr_data;
+ curr_data = cmd_next_param(curr_data, curr_schema[1]);
+ g_array_append_val(params, this_param);
+ break;
+ case 't':
+ this_param.thread_id.kind =
+ read_thread_id(curr_data, &curr_data,
+ &this_param.thread_id.pid,
+ &this_param.thread_id.tid);
+ curr_data = cmd_next_param(curr_data, curr_schema[1]);
+ g_array_append_val(params, this_param);
+ break;
+ case '?':
+ curr_data = cmd_next_param(curr_data, curr_schema[1]);
+ break;
+ default:
+ return -EINVAL;
+ }
+ curr_schema += 2;
+ }
+
+ return 0;
+}
+
+static inline int startswith(const char *string, const char *pattern)
+{
+ return !strncmp(string, pattern, strlen(pattern));
+}
+
+static bool process_string_cmd(const char *data,
+ const GdbCmdParseEntry *cmds, int num_cmds)
+{
+ int i;
+ g_autoptr(GArray) params = g_array_new(false, true, sizeof(GdbCmdVariant));
+
+ if (!cmds) {
+ return false;
+ }
+
+ for (i = 0; i < num_cmds; i++) {
+ const GdbCmdParseEntry *cmd = &cmds[i];
+ void *user_ctx = NULL;
+ g_assert(cmd->handler && cmd->cmd);
+
+ if ((cmd->cmd_startswith && !startswith(data, cmd->cmd)) ||
+ (!cmd->cmd_startswith && strcmp(cmd->cmd, data))) {
+ continue;
+ }
+
+ if (cmd->schema) {
+ if (cmd_parse_params(&data[strlen(cmd->cmd)],
+ cmd->schema, params)) {
+ return false;
+ }
+ }
+
+ if (cmd->need_cpu_context) {
+ user_ctx = (void *)gdbserver_state.g_cpu;
+ }
+
+ gdbserver_state.allow_stop_reply = cmd->allow_stop_reply;
+ cmd->handler(params, user_ctx);
+ return true;
+ }
+
+ return false;
+}
+
+static void run_cmd_parser(const char *data, const GdbCmdParseEntry *cmd)
+{
+ if (!data) {
+ return;
+ }
+
+ g_string_set_size(gdbserver_state.str_buf, 0);
+ g_byte_array_set_size(gdbserver_state.mem_buf, 0);
+
+ /* In case there was an error during the command parsing we must
+ * send a NULL packet to indicate the command is not supported */
+ if (!process_string_cmd(data, cmd, 1)) {
+ gdb_put_packet("");
+ }
+}
+
+static void handle_detach(GArray *params, void *user_ctx)
+{
+ GDBProcess *process;
+ uint32_t pid = 1;
+
+ if (gdbserver_state.multiprocess) {
+ if (!params->len) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ pid = gdb_get_cmd_param(params, 0)->val_ul;
+ }
+
+#ifdef CONFIG_USER_ONLY
+ if (gdb_handle_detach_user(pid)) {
+ return;
+ }
+#endif
+
+ process = gdb_get_process(pid);
+ gdb_process_breakpoint_remove_all(process);
+ process->attached = false;
+
+ if (pid == gdb_get_cpu_pid(gdbserver_state.c_cpu)) {
+ gdbserver_state.c_cpu = gdb_first_attached_cpu();
+ }
+
+ if (pid == gdb_get_cpu_pid(gdbserver_state.g_cpu)) {
+ gdbserver_state.g_cpu = gdb_first_attached_cpu();
+ }
+
+ if (!gdbserver_state.c_cpu) {
+ /* No more process attached */
+ gdb_disable_syscalls();
+ gdb_continue();
+ }
+ gdb_put_packet("OK");
+}
+
+static void handle_thread_alive(GArray *params, void *user_ctx)
+{
+ CPUState *cpu;
+
+ if (!params->len) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ if (gdb_get_cmd_param(params, 0)->thread_id.kind == GDB_READ_THREAD_ERR) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ cpu = gdb_get_cpu(gdb_get_cmd_param(params, 0)->thread_id.pid,
+ gdb_get_cmd_param(params, 0)->thread_id.tid);
+ if (!cpu) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ gdb_put_packet("OK");
+}
+
+static void handle_continue(GArray *params, void *user_ctx)
+{
+ if (params->len) {
+ gdb_set_cpu_pc(gdb_get_cmd_param(params, 0)->val_ull);
+ }
+
+ gdbserver_state.signal = 0;
+ gdb_continue();
+}
+
+static void handle_cont_with_sig(GArray *params, void *user_ctx)
+{
+ unsigned long signal = 0;
+
+ /*
+ * Note: C sig;[addr] is currently unsupported and we simply
+ * omit the addr parameter
+ */
+ if (params->len) {
+ signal = gdb_get_cmd_param(params, 0)->val_ul;
+ }
+
+ gdbserver_state.signal = gdb_signal_to_target(signal);
+ if (gdbserver_state.signal == -1) {
+ gdbserver_state.signal = 0;
+ }
+ gdb_continue();
+}
+
+static void handle_set_thread(GArray *params, void *user_ctx)
+{
+ uint32_t pid, tid;
+ CPUState *cpu;
+
+ if (params->len != 2) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ if (gdb_get_cmd_param(params, 1)->thread_id.kind == GDB_READ_THREAD_ERR) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ if (gdb_get_cmd_param(params, 1)->thread_id.kind != GDB_ONE_THREAD) {
+ gdb_put_packet("OK");
+ return;
+ }
+
+ pid = gdb_get_cmd_param(params, 1)->thread_id.pid;
+ tid = gdb_get_cmd_param(params, 1)->thread_id.tid;
+#ifdef CONFIG_USER_ONLY
+ if (gdb_handle_set_thread_user(pid, tid)) {
+ return;
+ }
+#endif
+ cpu = gdb_get_cpu(pid, tid);
+ if (!cpu) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ /*
+ * Note: This command is deprecated and modern gdb's will be using the
+ * vCont command instead.
+ */
+ switch (gdb_get_cmd_param(params, 0)->opcode) {
+ case 'c':
+ gdbserver_state.c_cpu = cpu;
+ gdb_put_packet("OK");
+ break;
+ case 'g':
+ gdbserver_state.g_cpu = cpu;
+ gdb_put_packet("OK");
+ break;
+ default:
+ gdb_put_packet("E22");
+ break;
+ }
+}
+
+static void handle_insert_bp(GArray *params, void *user_ctx)
+{
+ int res;
+
+ if (params->len != 3) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ res = gdb_breakpoint_insert(gdbserver_state.c_cpu,
+ gdb_get_cmd_param(params, 0)->val_ul,
+ gdb_get_cmd_param(params, 1)->val_ull,
+ gdb_get_cmd_param(params, 2)->val_ull);
+ if (res >= 0) {
+ gdb_put_packet("OK");
+ return;
+ } else if (res == -ENOSYS) {
+ gdb_put_packet("");
+ return;
+ }
+
+ gdb_put_packet("E22");
+}
+
+static void handle_remove_bp(GArray *params, void *user_ctx)
+{
+ int res;
+
+ if (params->len != 3) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ res = gdb_breakpoint_remove(gdbserver_state.c_cpu,
+ gdb_get_cmd_param(params, 0)->val_ul,
+ gdb_get_cmd_param(params, 1)->val_ull,
+ gdb_get_cmd_param(params, 2)->val_ull);
+ if (res >= 0) {
+ gdb_put_packet("OK");
+ return;
+ } else if (res == -ENOSYS) {
+ gdb_put_packet("");
+ return;
+ }
+
+ gdb_put_packet("E22");
+}
+
+/*
+ * handle_set/get_reg
+ *
+ * Older gdb are really dumb, and don't use 'G/g' if 'P/p' is available.
+ * This works, but can be very slow. Anything new enough to understand
+ * XML also knows how to use this properly. However to use this we
+ * need to define a local XML file as well as be talking to a
+ * reasonably modern gdb. Responding with an empty packet will cause
+ * the remote gdb to fallback to older methods.
+ */
+
+static void handle_set_reg(GArray *params, void *user_ctx)
+{
+ int reg_size;
+
+ if (params->len != 2) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ reg_size = strlen(gdb_get_cmd_param(params, 1)->data) / 2;
+ gdb_hextomem(gdbserver_state.mem_buf, gdb_get_cmd_param(params, 1)->data, reg_size);
+ gdb_write_register(gdbserver_state.g_cpu, gdbserver_state.mem_buf->data,
+ gdb_get_cmd_param(params, 0)->val_ull);
+ gdb_put_packet("OK");
+}
+
+static void handle_get_reg(GArray *params, void *user_ctx)
+{
+ int reg_size;
+
+ if (!params->len) {
+ gdb_put_packet("E14");
+ return;
+ }
+
+ reg_size = gdb_read_register(gdbserver_state.g_cpu,
+ gdbserver_state.mem_buf,
+ gdb_get_cmd_param(params, 0)->val_ull);
+ if (!reg_size) {
+ gdb_put_packet("E14");
+ return;
+ } else {
+ g_byte_array_set_size(gdbserver_state.mem_buf, reg_size);
+ }
+
+ gdb_memtohex(gdbserver_state.str_buf,
+ gdbserver_state.mem_buf->data, reg_size);
+ gdb_put_strbuf();
+}
+
+static void handle_write_mem(GArray *params, void *user_ctx)
+{
+ if (params->len != 3) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ /* gdb_hextomem() reads 2*len bytes */
+ if (gdb_get_cmd_param(params, 1)->val_ull >
+ strlen(gdb_get_cmd_param(params, 2)->data) / 2) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ gdb_hextomem(gdbserver_state.mem_buf, gdb_get_cmd_param(params, 2)->data,
+ gdb_get_cmd_param(params, 1)->val_ull);
+ if (gdb_target_memory_rw_debug(gdbserver_state.g_cpu,
+ gdb_get_cmd_param(params, 0)->val_ull,
+ gdbserver_state.mem_buf->data,
+ gdbserver_state.mem_buf->len, true)) {
+ gdb_put_packet("E14");
+ return;
+ }
+
+ gdb_put_packet("OK");
+}
+
+static void handle_read_mem(GArray *params, void *user_ctx)
+{
+ if (params->len != 2) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ /* gdb_memtohex() doubles the required space */
+ if (gdb_get_cmd_param(params, 1)->val_ull > MAX_PACKET_LENGTH / 2) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ g_byte_array_set_size(gdbserver_state.mem_buf,
+ gdb_get_cmd_param(params, 1)->val_ull);
+
+ if (gdb_target_memory_rw_debug(gdbserver_state.g_cpu,
+ gdb_get_cmd_param(params, 0)->val_ull,
+ gdbserver_state.mem_buf->data,
+ gdbserver_state.mem_buf->len, false)) {
+ gdb_put_packet("E14");
+ return;
+ }
+
+ gdb_memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data,
+ gdbserver_state.mem_buf->len);
+ gdb_put_strbuf();
+}
+
+static void handle_write_all_regs(GArray *params, void *user_ctx)
+{
+ int reg_id;
+ size_t len;
+ uint8_t *registers;
+ int reg_size;
+
+ if (!params->len) {
+ return;
+ }
+
+ cpu_synchronize_state(gdbserver_state.g_cpu);
+ len = strlen(gdb_get_cmd_param(params, 0)->data) / 2;
+ gdb_hextomem(gdbserver_state.mem_buf, gdb_get_cmd_param(params, 0)->data, len);
+ registers = gdbserver_state.mem_buf->data;
+ for (reg_id = 0;
+ reg_id < gdbserver_state.g_cpu->gdb_num_g_regs && len > 0;
+ reg_id++) {
+ reg_size = gdb_write_register(gdbserver_state.g_cpu, registers, reg_id);
+ len -= reg_size;
+ registers += reg_size;
+ }
+ gdb_put_packet("OK");
+}
+
+static void handle_read_all_regs(GArray *params, void *user_ctx)
+{
+ int reg_id;
+ size_t len;
+
+ cpu_synchronize_state(gdbserver_state.g_cpu);
+ g_byte_array_set_size(gdbserver_state.mem_buf, 0);
+ len = 0;
+ for (reg_id = 0; reg_id < gdbserver_state.g_cpu->gdb_num_g_regs; reg_id++) {
+ len += gdb_read_register(gdbserver_state.g_cpu,
+ gdbserver_state.mem_buf,
+ reg_id);
+ g_assert(len == gdbserver_state.mem_buf->len);
+ }
+
+ gdb_memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data, len);
+ gdb_put_strbuf();
+}
+
+
+static void handle_step(GArray *params, void *user_ctx)
+{
+ if (params->len) {
+ gdb_set_cpu_pc(gdb_get_cmd_param(params, 0)->val_ull);
+ }
+
+ cpu_single_step(gdbserver_state.c_cpu, gdbserver_state.sstep_flags);
+ gdb_continue();
+}
+
+static void handle_backward(GArray *params, void *user_ctx)
+{
+ if (!gdb_can_reverse()) {
+ gdb_put_packet("E22");
+ }
+ if (params->len == 1) {
+ switch (gdb_get_cmd_param(params, 0)->opcode) {
+ case 's':
+ if (replay_reverse_step()) {
+ gdb_continue();
+ } else {
+ gdb_put_packet("E14");
+ }
+ return;
+ case 'c':
+ if (replay_reverse_continue()) {
+ gdb_continue();
+ } else {
+ gdb_put_packet("E14");
+ }
+ return;
+ }
+ }
+
+ /* Default invalid command */
+ gdb_put_packet("");
+}
+
+static void handle_v_cont_query(GArray *params, void *user_ctx)
+{
+ gdb_put_packet("vCont;c;C;s;S");
+}
+
+static void handle_v_cont(GArray *params, void *user_ctx)
+{
+ int res;
+
+ if (!params->len) {
+ return;
+ }
+
+ res = gdb_handle_vcont(gdb_get_cmd_param(params, 0)->data);
+ if ((res == -EINVAL) || (res == -ERANGE)) {
+ gdb_put_packet("E22");
+ } else if (res) {
+ gdb_put_packet("");
+ }
+}
+
+static void handle_v_attach(GArray *params, void *user_ctx)
+{
+ GDBProcess *process;
+ CPUState *cpu;
+
+ g_string_assign(gdbserver_state.str_buf, "E22");
+ if (!params->len) {
+ goto cleanup;
+ }
+
+ process = gdb_get_process(gdb_get_cmd_param(params, 0)->val_ul);
+ if (!process) {
+ goto cleanup;
+ }
+
+ cpu = gdb_get_first_cpu_in_process(process);
+ if (!cpu) {
+ goto cleanup;
+ }
+
+ process->attached = true;
+ gdbserver_state.g_cpu = cpu;
+ gdbserver_state.c_cpu = cpu;
+
+ if (gdbserver_state.allow_stop_reply) {
+ g_string_printf(gdbserver_state.str_buf, "T%02xthread:", GDB_SIGNAL_TRAP);
+ gdb_append_thread_id(cpu, gdbserver_state.str_buf);
+ g_string_append_c(gdbserver_state.str_buf, ';');
+ gdbserver_state.allow_stop_reply = false;
+cleanup:
+ gdb_put_strbuf();
+ }
+}
+
+static void handle_v_kill(GArray *params, void *user_ctx)
+{
+ /* Kill the target */
+ gdb_put_packet("OK");
+ error_report("QEMU: Terminated via GDBstub");
+ gdb_exit(0);
+ gdb_qemu_exit(0);
+}
+
+static const GdbCmdParseEntry gdb_v_commands_table[] = {
+ /* Order is important if has same prefix */
+ {
+ .handler = handle_v_cont_query,
+ .cmd = "Cont?",
+ .cmd_startswith = true
+ },
+ {
+ .handler = handle_v_cont,
+ .cmd = "Cont",
+ .cmd_startswith = true,
+ .allow_stop_reply = true,
+ .schema = "s0"
+ },
+ {
+ .handler = handle_v_attach,
+ .cmd = "Attach;",
+ .cmd_startswith = true,
+ .allow_stop_reply = true,
+ .schema = "l0"
+ },
+ {
+ .handler = handle_v_kill,
+ .cmd = "Kill;",
+ .cmd_startswith = true
+ },
+#ifdef CONFIG_USER_ONLY
+ /*
+ * Host I/O Packets. See [1] for details.
+ * [1] https://sourceware.org/gdb/onlinedocs/gdb/Host-I_002fO-Packets.html
+ */
+ {
+ .handler = gdb_handle_v_file_open,
+ .cmd = "File:open:",
+ .cmd_startswith = true,
+ .schema = "s,L,L0"
+ },
+ {
+ .handler = gdb_handle_v_file_close,
+ .cmd = "File:close:",
+ .cmd_startswith = true,
+ .schema = "l0"
+ },
+ {
+ .handler = gdb_handle_v_file_pread,
+ .cmd = "File:pread:",
+ .cmd_startswith = true,
+ .schema = "l,L,L0"
+ },
+ {
+ .handler = gdb_handle_v_file_readlink,
+ .cmd = "File:readlink:",
+ .cmd_startswith = true,
+ .schema = "s0"
+ },
+#endif
+};
+
+static void handle_v_commands(GArray *params, void *user_ctx)
+{
+ if (!params->len) {
+ return;
+ }
+
+ if (!process_string_cmd(gdb_get_cmd_param(params, 0)->data,
+ gdb_v_commands_table,
+ ARRAY_SIZE(gdb_v_commands_table))) {
+ gdb_put_packet("");
+ }
+}
+
+static void handle_query_qemu_sstepbits(GArray *params, void *user_ctx)
+{
+ g_string_printf(gdbserver_state.str_buf, "ENABLE=%x", SSTEP_ENABLE);
+
+ if (gdbserver_state.supported_sstep_flags & SSTEP_NOIRQ) {
+ g_string_append_printf(gdbserver_state.str_buf, ",NOIRQ=%x",
+ SSTEP_NOIRQ);
+ }
+
+ if (gdbserver_state.supported_sstep_flags & SSTEP_NOTIMER) {
+ g_string_append_printf(gdbserver_state.str_buf, ",NOTIMER=%x",
+ SSTEP_NOTIMER);
+ }
+
+ gdb_put_strbuf();
+}
+
+static void handle_set_qemu_sstep(GArray *params, void *user_ctx)
+{
+ int new_sstep_flags;
+
+ if (!params->len) {
+ return;
+ }
+
+ new_sstep_flags = gdb_get_cmd_param(params, 0)->val_ul;
+
+ if (new_sstep_flags & ~gdbserver_state.supported_sstep_flags) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ gdbserver_state.sstep_flags = new_sstep_flags;
+ gdb_put_packet("OK");
+}
+
+static void handle_query_qemu_sstep(GArray *params, void *user_ctx)
+{
+ g_string_printf(gdbserver_state.str_buf, "0x%x",
+ gdbserver_state.sstep_flags);
+ gdb_put_strbuf();
+}
+
+static void handle_query_curr_tid(GArray *params, void *user_ctx)
+{
+ CPUState *cpu;
+ GDBProcess *process;
+
+ /*
+ * "Current thread" remains vague in the spec, so always return
+ * the first thread of the current process (gdb returns the
+ * first thread).
+ */
+ process = gdb_get_cpu_process(gdbserver_state.g_cpu);
+ cpu = gdb_get_first_cpu_in_process(process);
+ g_string_assign(gdbserver_state.str_buf, "QC");
+ gdb_append_thread_id(cpu, gdbserver_state.str_buf);
+ gdb_put_strbuf();
+}
+
+static void handle_query_threads(GArray *params, void *user_ctx)
+{
+ if (!gdbserver_state.query_cpu) {
+ gdb_put_packet("l");
+ return;
+ }
+
+ g_string_assign(gdbserver_state.str_buf, "m");
+ gdb_append_thread_id(gdbserver_state.query_cpu, gdbserver_state.str_buf);
+ gdb_put_strbuf();
+ gdbserver_state.query_cpu = gdb_next_attached_cpu(gdbserver_state.query_cpu);
+}
+
+static void handle_query_gdb_server_version(GArray *params, void *user_ctx)
+{
+#if defined(CONFIG_USER_ONLY)
+ g_string_printf(gdbserver_state.str_buf, "name:qemu-%s;version:%s;",
+ target_name(), QEMU_VERSION);
+#else
+ g_string_printf(gdbserver_state.str_buf, "name:qemu-system-%s;version:%s;",
+ target_name(), QEMU_VERSION);
+#endif
+ gdb_put_strbuf();
+}
+
+static void handle_query_first_threads(GArray *params, void *user_ctx)
+{
+ gdbserver_state.query_cpu = gdb_first_attached_cpu();
+ handle_query_threads(params, user_ctx);
+}
+
+static void handle_query_thread_extra(GArray *params, void *user_ctx)
+{
+ g_autoptr(GString) rs = g_string_new(NULL);
+ CPUState *cpu;
+
+ if (!params->len ||
+ gdb_get_cmd_param(params, 0)->thread_id.kind == GDB_READ_THREAD_ERR) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ cpu = gdb_get_cpu(gdb_get_cmd_param(params, 0)->thread_id.pid,
+ gdb_get_cmd_param(params, 0)->thread_id.tid);
+ if (!cpu) {
+ return;
+ }
+
+ cpu_synchronize_state(cpu);
+
+ if (gdbserver_state.multiprocess && (gdbserver_state.process_num > 1)) {
+ /* Print the CPU model and name in multiprocess mode */
+ ObjectClass *oc = object_get_class(OBJECT(cpu));
+ const char *cpu_model = object_class_get_name(oc);
+ const char *cpu_name =
+ object_get_canonical_path_component(OBJECT(cpu));
+ g_string_printf(rs, "%s %s [%s]", cpu_model, cpu_name,
+ cpu->halted ? "halted " : "running");
+ } else {
+ g_string_printf(rs, "CPU#%d [%s]", cpu->cpu_index,
+ cpu->halted ? "halted " : "running");
+ }
+ trace_gdbstub_op_extra_info(rs->str);
+ gdb_memtohex(gdbserver_state.str_buf, (uint8_t *)rs->str, rs->len);
+ gdb_put_strbuf();
+}
+
+
+static char **extra_query_flags;
+
+void gdb_extend_qsupported_features(char *qflags)
+{
+ if (!extra_query_flags) {
+ extra_query_flags = g_new0(char *, 2);
+ extra_query_flags[0] = g_strdup(qflags);
+ } else if (!g_strv_contains((const gchar * const *) extra_query_flags,
+ qflags)) {
+ int len = g_strv_length(extra_query_flags);
+ extra_query_flags = g_realloc_n(extra_query_flags, len + 2,
+ sizeof(char *));
+ extra_query_flags[len] = g_strdup(qflags);
+ }
+}
+
+static void handle_query_supported(GArray *params, void *user_ctx)
+{
+ g_string_printf(gdbserver_state.str_buf, "PacketSize=%x", MAX_PACKET_LENGTH);
+ if (gdb_get_core_xml_file(first_cpu)) {
+ g_string_append(gdbserver_state.str_buf, ";qXfer:features:read+");
+ }
+
+ if (gdb_can_reverse()) {
+ g_string_append(gdbserver_state.str_buf,
+ ";ReverseStep+;ReverseContinue+");
+ }
+
+#if defined(CONFIG_USER_ONLY)
+#if defined(CONFIG_LINUX)
+ if (get_task_state(gdbserver_state.c_cpu)) {
+ g_string_append(gdbserver_state.str_buf, ";qXfer:auxv:read+");
+ }
+ g_string_append(gdbserver_state.str_buf, ";QCatchSyscalls+");
+
+ g_string_append(gdbserver_state.str_buf, ";qXfer:siginfo:read+");
+#endif
+ g_string_append(gdbserver_state.str_buf, ";qXfer:exec-file:read+");
+#endif
+
+ if (params->len) {
+ const char *gdb_supported = gdb_get_cmd_param(params, 0)->data;
+
+ if (strstr(gdb_supported, "multiprocess+")) {
+ gdbserver_state.multiprocess = true;
+ }
+#if defined(CONFIG_USER_ONLY)
+ gdb_handle_query_supported_user(gdb_supported);
+#endif
+ }
+
+ g_string_append(gdbserver_state.str_buf, ";vContSupported+;multiprocess+");
+
+ if (extra_query_flags) {
+ int extras = g_strv_length(extra_query_flags);
+ for (int i = 0; i < extras; i++) {
+ g_string_append(gdbserver_state.str_buf, extra_query_flags[i]);
+ }
+ }
+
+ gdb_put_strbuf();
+}
+
+static void handle_query_xfer_features(GArray *params, void *user_ctx)
+{
+ GDBProcess *process;
+ unsigned long len, total_len, addr;
+ const char *xml;
+ const char *p;
+
+ if (params->len < 3) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ process = gdb_get_cpu_process(gdbserver_state.g_cpu);
+ if (!gdb_get_core_xml_file(gdbserver_state.g_cpu)) {
+ gdb_put_packet("");
+ return;
+ }
+
+ p = gdb_get_cmd_param(params, 0)->data;
+ xml = get_feature_xml(p, &p, process);
+ if (!xml) {
+ gdb_put_packet("E00");
+ return;
+ }
+
+ addr = gdb_get_cmd_param(params, 1)->val_ul;
+ len = gdb_get_cmd_param(params, 2)->val_ul;
+ total_len = strlen(xml);
+ if (addr > total_len) {
+ gdb_put_packet("E00");
+ return;
+ }
+
+ if (len > (MAX_PACKET_LENGTH - 5) / 2) {
+ len = (MAX_PACKET_LENGTH - 5) / 2;
+ }
+
+ if (len < total_len - addr) {
+ g_string_assign(gdbserver_state.str_buf, "m");
+ gdb_memtox(gdbserver_state.str_buf, xml + addr, len);
+ } else {
+ g_string_assign(gdbserver_state.str_buf, "l");
+ gdb_memtox(gdbserver_state.str_buf, xml + addr, total_len - addr);
+ }
+
+ gdb_put_packet_binary(gdbserver_state.str_buf->str,
+ gdbserver_state.str_buf->len, true);
+}
+
+static void handle_query_qemu_supported(GArray *params, void *user_ctx)
+{
+ g_string_printf(gdbserver_state.str_buf, "sstepbits;sstep");
+#ifndef CONFIG_USER_ONLY
+ g_string_append(gdbserver_state.str_buf, ";PhyMemMode");
+#endif
+ gdb_put_strbuf();
+}
+
+static const GdbCmdParseEntry gdb_gen_query_set_common_table[] = {
+ /* Order is important if has same prefix */
+ {
+ .handler = handle_query_qemu_sstepbits,
+ .cmd = "qemu.sstepbits",
+ },
+ {
+ .handler = handle_query_qemu_sstep,
+ .cmd = "qemu.sstep",
+ },
+ {
+ .handler = handle_set_qemu_sstep,
+ .cmd = "qemu.sstep=",
+ .cmd_startswith = true,
+ .schema = "l0"
+ },
+};
+
+/**
+ * extend_table() - extend one of the command tables
+ * @table: the command table to extend (or NULL)
+ * @extensions: a list of GdbCmdParseEntry pointers
+ *
+ * The entries themselves should be pointers to static const
+ * GdbCmdParseEntry entries. If the entry is already in the table we
+ * skip adding it again.
+ *
+ * Returns (a potentially freshly allocated) GPtrArray of GdbCmdParseEntry
+ */
+static GPtrArray *extend_table(GPtrArray *table, GPtrArray *extensions)
+{
+ if (!table) {
+ table = g_ptr_array_new();
+ }
+
+ for (int i = 0; i < extensions->len; i++) {
+ gpointer entry = g_ptr_array_index(extensions, i);
+ if (!g_ptr_array_find(table, entry, NULL)) {
+ g_ptr_array_add(table, entry);
+ }
+ }
+
+ return table;
+}
+
+/**
+ * process_extended_table() - run through an extended command table
+ * @table: the command table to check
+ * @data: parameters
+ *
+ * returns true if the command was found and executed
+ */
+static bool process_extended_table(GPtrArray *table, const char *data)
+{
+ for (int i = 0; i < table->len; i++) {
+ const GdbCmdParseEntry *entry = g_ptr_array_index(table, i);
+ if (process_string_cmd(data, entry, 1)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+
+/* Ptr to GdbCmdParseEntry */
+static GPtrArray *extended_query_table;
+
+void gdb_extend_query_table(GPtrArray *new_queries)
+{
+ extended_query_table = extend_table(extended_query_table, new_queries);
+}
+
+static const GdbCmdParseEntry gdb_gen_query_table[] = {
+ {
+ .handler = handle_query_curr_tid,
+ .cmd = "C",
+ },
+ {
+ .handler = handle_query_threads,
+ .cmd = "sThreadInfo",
+ },
+ {
+ .handler = handle_query_gdb_server_version,
+ .cmd = "GDBServerVersion",
+ },
+ {
+ .handler = handle_query_first_threads,
+ .cmd = "fThreadInfo",
+ },
+ {
+ .handler = handle_query_thread_extra,
+ .cmd = "ThreadExtraInfo,",
+ .cmd_startswith = true,
+ .schema = "t0"
+ },
+#ifdef CONFIG_USER_ONLY
+ {
+ .handler = gdb_handle_query_offsets,
+ .cmd = "Offsets",
+ },
+#else
+ {
+ .handler = gdb_handle_query_rcmd,
+ .cmd = "Rcmd,",
+ .cmd_startswith = true,
+ .schema = "s0"
+ },
+#endif
+ {
+ .handler = handle_query_supported,
+ .cmd = "Supported:",
+ .cmd_startswith = true,
+ .schema = "s0"
+ },
+ {
+ .handler = handle_query_supported,
+ .cmd = "Supported",
+ .schema = "s0"
+ },
+ {
+ .handler = handle_query_xfer_features,
+ .cmd = "Xfer:features:read:",
+ .cmd_startswith = true,
+ .schema = "s:l,l0"
+ },
+#if defined(CONFIG_USER_ONLY)
+#if defined(CONFIG_LINUX)
+ {
+ .handler = gdb_handle_query_xfer_auxv,
+ .cmd = "Xfer:auxv:read::",
+ .cmd_startswith = true,
+ .schema = "l,l0"
+ },
+ {
+ .handler = gdb_handle_query_xfer_siginfo,
+ .cmd = "Xfer:siginfo:read::",
+ .cmd_startswith = true,
+ .schema = "l,l0"
+ },
+#endif
+ {
+ .handler = gdb_handle_query_xfer_exec_file,
+ .cmd = "Xfer:exec-file:read:",
+ .cmd_startswith = true,
+ .schema = "l:l,l0"
+ },
+#endif
+ {
+ .handler = gdb_handle_query_attached,
+ .cmd = "Attached:",
+ .cmd_startswith = true
+ },
+ {
+ .handler = gdb_handle_query_attached,
+ .cmd = "Attached",
+ },
+ {
+ .handler = handle_query_qemu_supported,
+ .cmd = "qemu.Supported",
+ },
+#ifndef CONFIG_USER_ONLY
+ {
+ .handler = gdb_handle_query_qemu_phy_mem_mode,
+ .cmd = "qemu.PhyMemMode",
+ },
+#endif
+};
+
+/* Ptr to GdbCmdParseEntry */
+static GPtrArray *extended_set_table;
+
+void gdb_extend_set_table(GPtrArray *new_set)
+{
+ extended_set_table = extend_table(extended_set_table, new_set);
+}
+
+static const GdbCmdParseEntry gdb_gen_set_table[] = {
+ /* Order is important if has same prefix */
+ {
+ .handler = handle_set_qemu_sstep,
+ .cmd = "qemu.sstep:",
+ .cmd_startswith = true,
+ .schema = "l0"
+ },
+#ifndef CONFIG_USER_ONLY
+ {
+ .handler = gdb_handle_set_qemu_phy_mem_mode,
+ .cmd = "qemu.PhyMemMode:",
+ .cmd_startswith = true,
+ .schema = "l0"
+ },
+#endif
+#if defined(CONFIG_USER_ONLY)
+ {
+ .handler = gdb_handle_set_catch_syscalls,
+ .cmd = "CatchSyscalls:",
+ .cmd_startswith = true,
+ .schema = "s0",
+ },
+#endif
+};
+
+static void handle_gen_query(GArray *params, void *user_ctx)
+{
+ const char *data;
+
+ if (!params->len) {
+ return;
+ }
+
+ data = gdb_get_cmd_param(params, 0)->data;
+
+ if (process_string_cmd(data,
+ gdb_gen_query_set_common_table,
+ ARRAY_SIZE(gdb_gen_query_set_common_table))) {
+ return;
+ }
+
+ if (process_string_cmd(data,
+ gdb_gen_query_table,
+ ARRAY_SIZE(gdb_gen_query_table))) {
+ return;
+ }
+
+ if (extended_query_table &&
+ process_extended_table(extended_query_table, data)) {
+ return;
+ }
+
+ /* Can't handle query, return Empty response. */
+ gdb_put_packet("");
+}
+
+static void handle_gen_set(GArray *params, void *user_ctx)
+{
+ const char *data;
+
+ if (!params->len) {
+ return;
+ }
+
+ data = gdb_get_cmd_param(params, 0)->data;
+
+ if (process_string_cmd(data,
+ gdb_gen_query_set_common_table,
+ ARRAY_SIZE(gdb_gen_query_set_common_table))) {
+ return;
+ }
+
+ if (process_string_cmd(data,
+ gdb_gen_set_table,
+ ARRAY_SIZE(gdb_gen_set_table))) {
+ return;
+ }
+
+ if (extended_set_table &&
+ process_extended_table(extended_set_table, data)) {
+ return;
+ }
+
+ /* Can't handle set, return Empty response. */
+ gdb_put_packet("");
+}
+
+static void handle_target_halt(GArray *params, void *user_ctx)
+{
+ if (gdbserver_state.allow_stop_reply) {
+ g_string_printf(gdbserver_state.str_buf, "T%02xthread:", GDB_SIGNAL_TRAP);
+ gdb_append_thread_id(gdbserver_state.c_cpu, gdbserver_state.str_buf);
+ g_string_append_c(gdbserver_state.str_buf, ';');
+ gdb_put_strbuf();
+ gdbserver_state.allow_stop_reply = false;
+ }
+ /*
+ * Remove all the breakpoints when this query is issued,
+ * because gdb is doing an initial connect and the state
+ * should be cleaned up.
+ */
+ gdb_breakpoint_remove_all(gdbserver_state.c_cpu);
+}
+
+static int gdb_handle_packet(const char *line_buf)
+{
+ const GdbCmdParseEntry *cmd_parser = NULL;
+
+ trace_gdbstub_io_command(line_buf);
+
+ switch (line_buf[0]) {
+ case '!':
+ gdb_put_packet("OK");
+ break;
+ case '?':
+ {
+ static const GdbCmdParseEntry target_halted_cmd_desc = {
+ .handler = handle_target_halt,
+ .cmd = "?",
+ .cmd_startswith = true,
+ .allow_stop_reply = true,
+ };
+ cmd_parser = &target_halted_cmd_desc;
+ }
+ break;
+ case 'c':
+ {
+ static const GdbCmdParseEntry continue_cmd_desc = {
+ .handler = handle_continue,
+ .cmd = "c",
+ .cmd_startswith = true,
+ .allow_stop_reply = true,
+ .schema = "L0"
+ };
+ cmd_parser = &continue_cmd_desc;
+ }
+ break;
+ case 'C':
+ {
+ static const GdbCmdParseEntry cont_with_sig_cmd_desc = {
+ .handler = handle_cont_with_sig,
+ .cmd = "C",
+ .cmd_startswith = true,
+ .allow_stop_reply = true,
+ .schema = "l0"
+ };
+ cmd_parser = &cont_with_sig_cmd_desc;
+ }
+ break;
+ case 'v':
+ {
+ static const GdbCmdParseEntry v_cmd_desc = {
+ .handler = handle_v_commands,
+ .cmd = "v",
+ .cmd_startswith = true,
+ .schema = "s0"
+ };
+ cmd_parser = &v_cmd_desc;
+ }
+ break;
+ case 'k':
+ /* Kill the target */
+ error_report("QEMU: Terminated via GDBstub");
+ gdb_exit(0);
+ gdb_qemu_exit(0);
+ break;
+ case 'D':
+ {
+ static const GdbCmdParseEntry detach_cmd_desc = {
+ .handler = handle_detach,
+ .cmd = "D",
+ .cmd_startswith = true,
+ .schema = "?.l0"
+ };
+ cmd_parser = &detach_cmd_desc;
+ }
+ break;
+ case 's':
+ {
+ static const GdbCmdParseEntry step_cmd_desc = {
+ .handler = handle_step,
+ .cmd = "s",
+ .cmd_startswith = true,
+ .allow_stop_reply = true,
+ .schema = "L0"
+ };
+ cmd_parser = &step_cmd_desc;
+ }
+ break;
+ case 'b':
+ {
+ static const GdbCmdParseEntry backward_cmd_desc = {
+ .handler = handle_backward,
+ .cmd = "b",
+ .cmd_startswith = true,
+ .allow_stop_reply = true,
+ .schema = "o0"
+ };
+ cmd_parser = &backward_cmd_desc;
+ }
+ break;
+ case 'F':
+ {
+ static const GdbCmdParseEntry file_io_cmd_desc = {
+ .handler = gdb_handle_file_io,
+ .cmd = "F",
+ .cmd_startswith = true,
+ .schema = "L,L,o0"
+ };
+ cmd_parser = &file_io_cmd_desc;
+ }
+ break;
+ case 'g':
+ {
+ static const GdbCmdParseEntry read_all_regs_cmd_desc = {
+ .handler = handle_read_all_regs,
+ .cmd = "g",
+ .cmd_startswith = true
+ };
+ cmd_parser = &read_all_regs_cmd_desc;
+ }
+ break;
+ case 'G':
+ {
+ static const GdbCmdParseEntry write_all_regs_cmd_desc = {
+ .handler = handle_write_all_regs,
+ .cmd = "G",
+ .cmd_startswith = true,
+ .schema = "s0"
+ };
+ cmd_parser = &write_all_regs_cmd_desc;
+ }
+ break;
+ case 'm':
+ {
+ static const GdbCmdParseEntry read_mem_cmd_desc = {
+ .handler = handle_read_mem,
+ .cmd = "m",
+ .cmd_startswith = true,
+ .schema = "L,L0"
+ };
+ cmd_parser = &read_mem_cmd_desc;
+ }
+ break;
+ case 'M':
+ {
+ static const GdbCmdParseEntry write_mem_cmd_desc = {
+ .handler = handle_write_mem,
+ .cmd = "M",
+ .cmd_startswith = true,
+ .schema = "L,L:s0"
+ };
+ cmd_parser = &write_mem_cmd_desc;
+ }
+ break;
+ case 'p':
+ {
+ static const GdbCmdParseEntry get_reg_cmd_desc = {
+ .handler = handle_get_reg,
+ .cmd = "p",
+ .cmd_startswith = true,
+ .schema = "L0"
+ };
+ cmd_parser = &get_reg_cmd_desc;
+ }
+ break;
+ case 'P':
+ {
+ static const GdbCmdParseEntry set_reg_cmd_desc = {
+ .handler = handle_set_reg,
+ .cmd = "P",
+ .cmd_startswith = true,
+ .schema = "L?s0"
+ };
+ cmd_parser = &set_reg_cmd_desc;
+ }
+ break;
+ case 'Z':
+ {
+ static const GdbCmdParseEntry insert_bp_cmd_desc = {
+ .handler = handle_insert_bp,
+ .cmd = "Z",
+ .cmd_startswith = true,
+ .schema = "l?L?L0"
+ };
+ cmd_parser = &insert_bp_cmd_desc;
+ }
+ break;
+ case 'z':
+ {
+ static const GdbCmdParseEntry remove_bp_cmd_desc = {
+ .handler = handle_remove_bp,
+ .cmd = "z",
+ .cmd_startswith = true,
+ .schema = "l?L?L0"
+ };
+ cmd_parser = &remove_bp_cmd_desc;
+ }
+ break;
+ case 'H':
+ {
+ static const GdbCmdParseEntry set_thread_cmd_desc = {
+ .handler = handle_set_thread,
+ .cmd = "H",
+ .cmd_startswith = true,
+ .schema = "o.t0"
+ };
+ cmd_parser = &set_thread_cmd_desc;
+ }
+ break;
+ case 'T':
+ {
+ static const GdbCmdParseEntry thread_alive_cmd_desc = {
+ .handler = handle_thread_alive,
+ .cmd = "T",
+ .cmd_startswith = true,
+ .schema = "t0"
+ };
+ cmd_parser = &thread_alive_cmd_desc;
+ }
+ break;
+ case 'q':
+ {
+ static const GdbCmdParseEntry gen_query_cmd_desc = {
+ .handler = handle_gen_query,
+ .cmd = "q",
+ .cmd_startswith = true,
+ .schema = "s0"
+ };
+ cmd_parser = &gen_query_cmd_desc;
+ }
+ break;
+ case 'Q':
+ {
+ static const GdbCmdParseEntry gen_set_cmd_desc = {
+ .handler = handle_gen_set,
+ .cmd = "Q",
+ .cmd_startswith = true,
+ .schema = "s0"
+ };
+ cmd_parser = &gen_set_cmd_desc;
+ }
+ break;
+ default:
+ /* put empty packet */
+ gdb_put_packet("");
+ break;
+ }
+
+ if (cmd_parser) {
+ run_cmd_parser(line_buf, cmd_parser);
+ }
+
+ return RS_IDLE;
+}
+
+void gdb_set_stop_cpu(CPUState *cpu)
+{
+ GDBProcess *p = gdb_get_cpu_process(cpu);
+
+ if (!p->attached) {
+ /*
+ * Having a stop CPU corresponding to a process that is not attached
+ * confuses GDB. So we ignore the request.
+ */
+ return;
+ }
+
+ gdbserver_state.c_cpu = cpu;
+ gdbserver_state.g_cpu = cpu;
+}
+
+void gdb_read_byte(uint8_t ch)
+{
+ uint8_t reply;
+
+ gdbserver_state.allow_stop_reply = false;
+#ifndef CONFIG_USER_ONLY
+ 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();
+ gdb_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 == '$') {
+ g_byte_array_set_size(gdbserver_state.last_packet, 0);
+ }
+ if (ch != '$')
+ return;
+ }
+ if (runstate_is_running()) {
+ /*
+ * When the CPU is running, we cannot do anything except stop
+ * it when receiving a char. This is expected on a Ctrl-C in the
+ * gdb client. Because we are in all-stop mode, gdb sends a
+ * 0x03 byte which is not a usual packet, so we handle it specially
+ * here, but it does expect a stop reply.
+ */
+ if (ch != 0x03) {
+ trace_gdbstub_err_unexpected_runpkt(ch);
+ } else {
+ gdbserver_state.allow_stop_reply = true;
+ }
+ vm_stop(RUN_STATE_PAUSED);
+ } else
+#endif
+ {
+ switch(gdbserver_state.state) {
+ case RS_IDLE:
+ if (ch == '$') {
+ /* start of command packet */
+ gdbserver_state.line_buf_index = 0;
+ gdbserver_state.line_sum = 0;
+ gdbserver_state.state = RS_GETLINE;
+ } else if (ch == '+') {
+ /*
+ * do nothing, gdb may preemptively send out ACKs on
+ * initial connection
+ */
+ } else {
+ trace_gdbstub_err_garbage(ch);
+ }
+ break;
+ case RS_GETLINE:
+ if (ch == '}') {
+ /* start escape sequence */
+ gdbserver_state.state = RS_GETLINE_ESC;
+ gdbserver_state.line_sum += ch;
+ } else if (ch == '*') {
+ /* start run length encoding sequence */
+ gdbserver_state.state = RS_GETLINE_RLE;
+ gdbserver_state.line_sum += ch;
+ } else if (ch == '#') {
+ /* end of command, start of checksum*/
+ gdbserver_state.state = RS_CHKSUM1;
+ } else if (gdbserver_state.line_buf_index >= sizeof(gdbserver_state.line_buf) - 1) {
+ trace_gdbstub_err_overrun();
+ gdbserver_state.state = RS_IDLE;
+ } else {
+ /* unescaped command character */
+ gdbserver_state.line_buf[gdbserver_state.line_buf_index++] = ch;
+ gdbserver_state.line_sum += ch;
+ }
+ break;
+ case RS_GETLINE_ESC:
+ if (ch == '#') {
+ /* unexpected end of command in escape sequence */
+ gdbserver_state.state = RS_CHKSUM1;
+ } else if (gdbserver_state.line_buf_index >= sizeof(gdbserver_state.line_buf) - 1) {
+ /* command buffer overrun */
+ trace_gdbstub_err_overrun();
+ gdbserver_state.state = RS_IDLE;
+ } else {
+ /* parse escaped character and leave escape state */
+ gdbserver_state.line_buf[gdbserver_state.line_buf_index++] = ch ^ 0x20;
+ gdbserver_state.line_sum += ch;
+ gdbserver_state.state = RS_GETLINE;
+ }
+ break;
+ case RS_GETLINE_RLE:
+ /*
+ * Run-length encoding is explained in "Debugging with GDB /
+ * Appendix E GDB Remote Serial Protocol / Overview".
+ */
+ if (ch < ' ' || ch == '#' || ch == '$' || ch > 126) {
+ /* invalid RLE count encoding */
+ trace_gdbstub_err_invalid_repeat(ch);
+ gdbserver_state.state = RS_GETLINE;
+ } else {
+ /* decode repeat length */
+ int repeat = ch - ' ' + 3;
+ if (gdbserver_state.line_buf_index + repeat >= sizeof(gdbserver_state.line_buf) - 1) {
+ /* that many repeats would overrun the command buffer */
+ trace_gdbstub_err_overrun();
+ gdbserver_state.state = RS_IDLE;
+ } else if (gdbserver_state.line_buf_index < 1) {
+ /* got a repeat but we have nothing to repeat */
+ trace_gdbstub_err_invalid_rle();
+ gdbserver_state.state = RS_GETLINE;
+ } else {
+ /* repeat the last character */
+ memset(gdbserver_state.line_buf + gdbserver_state.line_buf_index,
+ gdbserver_state.line_buf[gdbserver_state.line_buf_index - 1], repeat);
+ gdbserver_state.line_buf_index += repeat;
+ gdbserver_state.line_sum += ch;
+ gdbserver_state.state = RS_GETLINE;
+ }
+ }
+ break;
+ case RS_CHKSUM1:
+ /* get high hex digit of checksum */
+ if (!isxdigit(ch)) {
+ trace_gdbstub_err_checksum_invalid(ch);
+ gdbserver_state.state = RS_GETLINE;
+ break;
+ }
+ gdbserver_state.line_buf[gdbserver_state.line_buf_index] = '\0';
+ gdbserver_state.line_csum = fromhex(ch) << 4;
+ gdbserver_state.state = RS_CHKSUM2;
+ break;
+ case RS_CHKSUM2:
+ /* get low hex digit of checksum */
+ if (!isxdigit(ch)) {
+ trace_gdbstub_err_checksum_invalid(ch);
+ gdbserver_state.state = RS_GETLINE;
+ break;
+ }
+ gdbserver_state.line_csum |= fromhex(ch);
+
+ if (gdbserver_state.line_csum != (gdbserver_state.line_sum & 0xff)) {
+ trace_gdbstub_err_checksum_incorrect(gdbserver_state.line_sum, gdbserver_state.line_csum);
+ /* send NAK reply */
+ reply = '-';
+ gdb_put_buffer(&reply, 1);
+ gdbserver_state.state = RS_IDLE;
+ } else {
+ /* send ACK reply */
+ reply = '+';
+ gdb_put_buffer(&reply, 1);
+ gdbserver_state.state = gdb_handle_packet(gdbserver_state.line_buf);
+ }
+ break;
+ default:
+ abort();
+ }
+ }
+}
+
+/*
+ * Create the process that will contain all the "orphan" CPUs (that are not
+ * part of a CPU cluster). Note that if this process contains no CPUs, it won't
+ * be attachable and thus will be invisible to the user.
+ */
+void gdb_create_default_process(GDBState *s)
+{
+ GDBProcess *process;
+ int pid;
+
+#ifdef CONFIG_USER_ONLY
+ assert(gdbserver_state.process_num == 0);
+ pid = getpid();
+#else
+ if (gdbserver_state.process_num) {
+ pid = s->processes[s->process_num - 1].pid;
+ } else {
+ pid = 0;
+ }
+ /* We need an available PID slot for this process */
+ assert(pid < UINT32_MAX);
+ pid++;
+#endif
+
+ s->processes = g_renew(GDBProcess, s->processes, ++s->process_num);
+ process = &s->processes[s->process_num - 1];
+ process->pid = pid;
+ process->attached = false;
+ process->target_xml = NULL;
+}
+
diff --git a/backup/gdbstub.h b/backup/gdbstub.h
new file mode 100644
index 0000000..a16c005
--- /dev/null
+++ b/backup/gdbstub.h
@@ -0,0 +1,164 @@
+#ifndef GDBSTUB_H
+#define GDBSTUB_H
+
+typedef struct GDBFeature {
+ const char *xmlname;
+ const char *xml;
+ const char *name;
+ const char * const *regs;
+ int num_regs;
+} GDBFeature;
+
+typedef struct GDBFeatureBuilder {
+ GDBFeature *feature;
+ GPtrArray *xml;
+ GPtrArray *regs;
+ int base_reg;
+} GDBFeatureBuilder;
+
+
+/* Get or set a register. Returns the size of the register. */
+typedef int (*gdb_get_reg_cb)(CPUState *cpu, GByteArray *buf, int reg);
+typedef int (*gdb_set_reg_cb)(CPUState *cpu, uint8_t *buf, int reg);
+
+/**
+ * gdb_init_cpu(): Initialize the CPU for gdbstub.
+ * @cpu: The CPU to be initialized.
+ */
+void gdb_init_cpu(CPUState *cpu);
+
+/**
+ * gdb_register_coprocessor() - register a supplemental set of registers
+ * @cpu - the CPU associated with registers
+ * @get_reg - get function (gdb reading)
+ * @set_reg - set function (gdb modifying)
+ * @num_regs - number of registers in set
+ * @xml - xml name of set
+ * @gpos - non-zero to append to "general" register set at @gpos
+ */
+void gdb_register_coprocessor(CPUState *cpu,
+ gdb_get_reg_cb get_reg, gdb_set_reg_cb set_reg,
+ const GDBFeature *feature, int g_pos);
+
+/**
+ * gdb_unregister_coprocessor_all() - unregisters supplemental set of registers
+ * @cpu - the CPU associated with registers
+ */
+void gdb_unregister_coprocessor_all(CPUState *cpu);
+
+/**
+ * gdbserver_start: start the gdb server
+ * @port_or_device: connection spec for gdb
+ * @errp: error handle
+ *
+ * For CONFIG_USER this is either a tcp port or a path to a fifo. For
+ * system emulation you can use a full chardev spec for your gdbserver
+ * port.
+ *
+ * The error handle should be either &error_fatal (for start-up) or
+ * &error_warn (for QMP/HMP initiated sessions).
+ *
+ * Returns true when server successfully started.
+ */
+bool gdbserver_start(const char *port_or_device, Error **errp);
+
+/**
+ * gdb_feature_builder_init() - Initialize GDBFeatureBuilder.
+ * @builder: The builder to be initialized.
+ * @feature: The feature to be filled.
+ * @name: The name of the feature.
+ * @xmlname: The name of the XML.
+ * @base_reg: The base number of the register ID.
+ */
+void gdb_feature_builder_init(GDBFeatureBuilder *builder, GDBFeature *feature,
+ const char *name, const char *xmlname,
+ int base_reg);
+
+/**
+ * gdb_feature_builder_append_tag() - Append a tag.
+ * @builder: The builder.
+ * @format: The format of the tag.
+ * @...: The values to be formatted.
+ */
+void G_GNUC_PRINTF(2, 3)
+gdb_feature_builder_append_tag(const GDBFeatureBuilder *builder,
+ const char *format, ...);
+
+/**
+ * gdb_feature_builder_append_reg() - Append a register.
+ * @builder: The builder.
+ * @name: The register's name; it must be unique within a CPU.
+ * @bitsize: The register's size, in bits.
+ * @regnum: The offset of the register's number in the feature.
+ * @type: The type of the register.
+ * @group: The register group to which this register belongs; it can be NULL.
+ */
+void gdb_feature_builder_append_reg(const GDBFeatureBuilder *builder,
+ const char *name,
+ int bitsize,
+ int regnum,
+ const char *type,
+ const char *group);
+
+/**
+ * gdb_feature_builder_end() - End building GDBFeature.
+ * @builder: The builder.
+ */
+void gdb_feature_builder_end(const GDBFeatureBuilder *builder);
+
+/**
+ * gdb_find_static_feature() - Find a static feature.
+ * @xmlname: The name of the XML.
+ *
+ * Return: The static feature.
+ */
+const GDBFeature *gdb_find_static_feature(const char *xmlname);
+
+/**
+ * gdb_read_register() - Read a register associated with a CPU.
+ * @cpu: The CPU associated with the register.
+ * @buf: The buffer that the read register will be appended to.
+ * @reg: The register's number returned by gdb_find_feature_register().
+ *
+ * Return: The number of read bytes.
+ */
+int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
+
+/**
+ * gdb_write_register() - Write a register associated with a CPU.
+ * @cpu: The CPU associated with the register.
+ * @buf: The buffer that the register contents will be set to.
+ * @reg: The register's number returned by gdb_find_feature_register().
+ *
+ * The size of @buf must be at least the size of the register being
+ * written.
+ *
+ * Return: The number of written bytes, or 0 if an error occurred (for
+ * example, an unknown register was provided).
+ */
+int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg);
+
+/**
+ * typedef GDBRegDesc - a register description from gdbstub
+ */
+typedef struct {
+ int gdb_reg;
+ const char *name;
+ const char *feature_name;
+} GDBRegDesc;
+
+/**
+ * gdb_get_register_list() - Return list of all registers for CPU
+ * @cpu: The CPU being searched
+ *
+ * Returns a GArray of GDBRegDesc, caller frees array but not the
+ * const strings.
+ */
+GArray *gdb_get_register_list(CPUState *cpu);
+
+void gdb_set_stop_cpu(CPUState *cpu);
+
+/* in gdbstub-xml.c, generated by scripts/feature_to_c.py */
+extern const GDBFeature gdb_static_features[];
+
+#endif /* GDBSTUB_H */
diff --git a/gdbstub/helpers.h b/backup/helpers.h
similarity index 100%
rename from gdbstub/helpers.h
rename to backup/helpers.h
diff --git a/backup/internals.h b/backup/internals.h
new file mode 100644
index 0000000..92466b2
--- /dev/null
+++ b/backup/internals.h
@@ -0,0 +1,240 @@
+/*
+ * gdbstub internals
+ *
+ * Copyright (c) 2022 Linaro Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef GDBSTUB_INTERNALS_H
+#define GDBSTUB_INTERNALS_H
+
+#include "exec/cpu-common.h"
+
+/*
+ * Most "large" transfers (e.g. memory reads, feature XML
+ * transfer) have mechanisms in the gdb protocol for splitting
+ * them. However, register values in particular cannot currently
+ * be split. This packet size must therefore be at least big enough
+ * for the worst-case register size. Currently that is Arm SME
+ * ZA storage with a 256x256 byte value. We also must account
+ * for the conversion from raw data to hex in gdb_memtohex(),
+ * which writes 2 * size bytes, and for other protocol overhead
+ * including command, register number and checksum which add
+ * another 4 bytes of overhead. However, to be consistent with
+ * the changes made in gdbserver to address this same requirement,
+ * we add a total of 32 bytes to account for protocol overhead
+ * (unclear why specifically 32 bytes), bringing the value of
+ * MAX_PACKET_LENGTH to 2 * 256 * 256 + 32 = 131104.
+ *
+ * The commit making this change for gdbserver can be found here:
+ * https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=
+ * b816042e88583f280ad186ff124ab84d31fb592b
+ */
+#define MAX_PACKET_LENGTH 131104
+
+/*
+ * Shared structures and definitions
+ */
+
+enum {
+ GDB_SIGNAL_0 = 0,
+ GDB_SIGNAL_INT = 2,
+ GDB_SIGNAL_QUIT = 3,
+ GDB_SIGNAL_TRAP = 5,
+ GDB_SIGNAL_ABRT = 6,
+ GDB_SIGNAL_ALRM = 14,
+ GDB_SIGNAL_STOP = 17,
+ GDB_SIGNAL_IO = 23,
+ GDB_SIGNAL_XCPU = 24,
+ GDB_SIGNAL_UNKNOWN = 143
+};
+
+typedef struct GDBProcess {
+ uint32_t pid;
+ bool attached;
+ char *target_xml;
+} GDBProcess;
+
+enum RSState {
+ RS_INACTIVE,
+ RS_IDLE,
+ RS_GETLINE,
+ RS_GETLINE_ESC,
+ RS_GETLINE_RLE,
+ RS_CHKSUM1,
+ RS_CHKSUM2,
+};
+
+typedef struct GDBState {
+ bool init; /* have we been initialised? */
+ CPUState *c_cpu; /* current CPU for step/continue ops */
+ CPUState *g_cpu; /* current CPU for other ops */
+ CPUState *query_cpu; /* for q{f|s}ThreadInfo */
+ enum RSState state; /* parsing state */
+ char line_buf[MAX_PACKET_LENGTH];
+ int line_buf_index;
+ int line_sum; /* running checksum */
+ int line_csum; /* checksum at the end of the packet */
+ GByteArray *last_packet;
+ int signal;
+ bool multiprocess;
+ GDBProcess *processes;
+ int process_num;
+ GString *str_buf;
+ GByteArray *mem_buf;
+ int sstep_flags;
+ int supported_sstep_flags;
+ /*
+ * Whether we are allowed to send a stop reply packet at this moment.
+ * Must be set off after sending the stop reply itself.
+ */
+ bool allow_stop_reply;
+} GDBState;
+
+/* lives in main gdbstub.c */
+extern GDBState gdbserver_state;
+
+/*
+ * Inline utility function, convert from int to hex and back
+ */
+
+static inline int fromhex(int v)
+{
+ if (v >= '0' && v <= '9') {
+ return v - '0';
+ } else if (v >= 'A' && v <= 'F') {
+ return v - 'A' + 10;
+ } else if (v >= 'a' && v <= 'f') {
+ return v - 'a' + 10;
+ } else {
+ return 0;
+ }
+}
+
+static inline int tohex(int v)
+{
+ if (v < 10) {
+ return v + '0';
+ } else {
+ return v - 10 + 'a';
+ }
+}
+
+/*
+ * Connection helpers for both system and user backends
+ */
+
+void gdb_put_strbuf(void);
+int gdb_put_packet_binary(const char *buf, int len, bool dump);
+void gdb_memtohex(GString *buf, const uint8_t *mem, int len);
+void gdb_memtox(GString *buf, const char *mem, int len);
+void gdb_read_byte(uint8_t ch);
+
+/*
+ * Packet acknowledgement - we handle this slightly differently
+ * between user and system mode, mainly to deal with the differences
+ * between the flexible chardev and the direct fd approaches.
+ *
+ * We currently don't support a negotiated QStartNoAckMode
+ */
+
+/**
+ * gdb_got_immediate_ack() - check ok to continue
+ *
+ * Returns true to continue, false to re-transmit for user only, the
+ * system stub always returns true.
+ */
+bool gdb_got_immediate_ack(void);
+/* utility helpers */
+GDBProcess *gdb_get_process(uint32_t pid);
+CPUState *gdb_get_first_cpu_in_process(GDBProcess *process);
+CPUState *gdb_first_attached_cpu(void);
+void gdb_append_thread_id(CPUState *cpu, GString *buf);
+int gdb_get_cpu_index(CPUState *cpu);
+unsigned int gdb_get_max_cpus(void); /* both */
+bool gdb_can_reverse(void); /* system emulation, stub for user */
+int gdb_target_sigtrap(void); /* user */
+
+void gdb_create_default_process(GDBState *s);
+
+/* signal mapping, common for system, specialised for user-mode */
+int gdb_signal_to_target(int sig);
+int gdb_target_signal_to_gdb(int sig);
+
+int gdb_get_char(void); /* user only */
+
+/**
+ * gdb_continue() - handle continue in mode specific way.
+ */
+void gdb_continue(void);
+
+/**
+ * gdb_continue_partial() - handle partial continue in mode specific way.
+ */
+int gdb_continue_partial(char *newstates);
+
+/*
+ * Helpers with separate system and user implementations
+ */
+void gdb_put_buffer(const uint8_t *buf, int len);
+
+/*
+ * Command handlers - either specialised or system or user only
+ */
+void gdb_init_gdbserver_state(void);
+
+void gdb_handle_query_rcmd(GArray *params, void *ctx); /* system */
+void gdb_handle_query_offsets(GArray *params, void *user_ctx); /* user */
+void gdb_handle_query_xfer_auxv(GArray *params, void *user_ctx); /*user */
+void gdb_handle_query_xfer_siginfo(GArray *params, void *user_ctx); /*user */
+void gdb_handle_v_file_open(GArray *params, void *user_ctx); /* user */
+void gdb_handle_v_file_close(GArray *params, void *user_ctx); /* user */
+void gdb_handle_v_file_pread(GArray *params, void *user_ctx); /* user */
+void gdb_handle_v_file_readlink(GArray *params, void *user_ctx); /* user */
+void gdb_handle_query_xfer_exec_file(GArray *params, void *user_ctx); /* user */
+void gdb_handle_set_catch_syscalls(GArray *params, void *user_ctx); /* user */
+void gdb_handle_query_supported_user(const char *gdb_supported); /* user */
+bool gdb_handle_set_thread_user(uint32_t pid, uint32_t tid); /* user */
+bool gdb_handle_detach_user(uint32_t pid); /* user */
+
+void gdb_handle_query_attached(GArray *params, void *ctx); /* both */
+
+/* system only */
+void gdb_handle_query_qemu_phy_mem_mode(GArray *params, void *ctx);
+void gdb_handle_set_qemu_phy_mem_mode(GArray *params, void *ctx);
+
+/* sycall handling */
+void gdb_handle_file_io(GArray *params, void *user_ctx);
+bool gdb_handled_syscall(void);
+void gdb_disable_syscalls(void);
+void gdb_syscall_reset(void);
+
+/* user/system specific syscall handling */
+void gdb_syscall_handling(const char *syscall_packet);
+
+/*
+ * Break/Watch point support - there is an implementation for system
+ * and user mode.
+ */
+bool gdb_supports_guest_debug(void);
+int gdb_breakpoint_insert(CPUState *cs, int type, vaddr addr, vaddr len);
+int gdb_breakpoint_remove(CPUState *cs, int type, vaddr addr, vaddr len);
+void gdb_breakpoint_remove_all(CPUState *cs);
+
+/**
+ * gdb_target_memory_rw_debug() - handle debug access to memory
+ * @cs: CPUState
+ * @addr: nominal address, could be an entire physical address
+ * @buf: data
+ * @len: length of access
+ * @is_write: is it a write operation
+ *
+ * This function is specialised depending on the mode we are running
+ * in. For system guests we can switch the interpretation of the
+ * address to a physical address.
+ */
+int gdb_target_memory_rw_debug(CPUState *cs, hwaddr addr,
+ uint8_t *buf, int len, bool is_write);
+
+#endif /* GDBSTUB_INTERNALS_H */
diff --git a/gdbstub/meson.build b/backup/meson.build
similarity index 100%
rename from gdbstub/meson.build
rename to backup/meson.build
diff --git a/gdbstub/syscalls.c b/backup/syscalls.c
similarity index 100%
rename from gdbstub/syscalls.c
rename to backup/syscalls.c
diff --git a/gdbstub/syscalls.h b/backup/syscalls.h
similarity index 100%
rename from gdbstub/syscalls.h
rename to backup/syscalls.h
diff --git a/backup/system.c b/backup/system.c
new file mode 100644
index 0000000..5be0d3c
--- /dev/null
+++ b/backup/system.c
@@ -0,0 +1,669 @@
+/*
+ * gdb server stub - system specific bits
+ *
+ * Debug integration depends on support from the individual
+ * accelerators so most of this involves calling the ops helpers.
+ *
+ * Copyright (c) 2003-2005 Fabrice Bellard
+ * Copyright (c) 2022 Linaro Ltd
+ *
+ * SPDX-License-Identifier: LGPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qemu/error-report.h"
+#include "qemu/cutils.h"
+#include "exec/gdbstub.h"
+#include "gdbstub/syscalls.h"
+#include "gdbstub/commands.h"
+#include "exec/hwaddr.h"
+#include "exec/tb-flush.h"
+#include "accel/accel-ops.h"
+#include "accel/accel-cpu-ops.h"
+#include "system/cpus.h"
+#include "system/runstate.h"
+#include "system/replay.h"
+#include "system/tcg.h"
+#include "hw/core/cpu.h"
+#include "hw/cpu/cluster.h"
+#include "hw/boards.h"
+#include "chardev/char.h"
+#include "chardev/char-fe.h"
+#include "monitor/monitor.h"
+#include "trace.h"
+#include "internals.h"
+
+/* System emulation specific state */
+typedef struct {
+ CharBackend chr;
+ Chardev *mon_chr;
+} GDBSystemState;
+
+GDBSystemState gdbserver_system_state;
+
+static void reset_gdbserver_state(void)
+{
+ g_free(gdbserver_state.processes);
+ gdbserver_state.processes = NULL;
+ gdbserver_state.process_num = 0;
+ gdbserver_state.allow_stop_reply = false;
+}
+
+/*
+ * Return the GDB index for a given vCPU state.
+ *
+ * In system mode GDB numbers CPUs from 1 as 0 is reserved as an "any
+ * cpu" index.
+ */
+int gdb_get_cpu_index(CPUState *cpu)
+{
+ return cpu->cpu_index + 1;
+}
+
+/*
+ * We check the status of the last message in the chardev receive code
+ */
+bool gdb_got_immediate_ack(void)
+{
+ return true;
+}
+
+/*
+ * GDB Connection management. For system emulation we do all of this
+ * via our existing Chardev infrastructure which allows us to support
+ * network and unix sockets.
+ */
+
+void gdb_put_buffer(const uint8_t *buf, int len)
+{
+ /*
+ * XXX this blocks entire thread. Rewrite to use
+ * qemu_chr_fe_write and background I/O callbacks
+ */
+ qemu_chr_fe_write_all(&gdbserver_system_state.chr, buf, len);
+}
+
+static void gdb_chr_event(void *opaque, QEMUChrEvent event)
+{
+ int i;
+ GDBState *s = (GDBState *) opaque;
+
+ switch (event) {
+ case CHR_EVENT_OPENED:
+ /* Start with first process attached, others detached */
+ for (i = 0; i < s->process_num; i++) {
+ s->processes[i].attached = !i;
+ }
+
+ s->c_cpu = gdb_first_attached_cpu();
+ s->g_cpu = s->c_cpu;
+
+ vm_stop(RUN_STATE_PAUSED);
+ replay_gdb_attached();
+ break;
+ default:
+ break;
+ }
+}
+
+/*
+ * In system-mode we stop the VM and wait to send the syscall packet
+ * until notification that the CPU has stopped. This must be done
+ * because if the packet is sent now the reply from the syscall
+ * request could be received while the CPU is still in the running
+ * state, which can cause packets to be dropped and state transition
+ * 'T' packets to be sent while the syscall is still being processed.
+ */
+void gdb_syscall_handling(const char *syscall_packet)
+{
+ vm_stop(RUN_STATE_DEBUG);
+ qemu_cpu_kick(gdbserver_state.c_cpu);
+}
+
+static void gdb_vm_state_change(void *opaque, bool running, RunState state)
+{
+ CPUState *cpu = gdbserver_state.c_cpu;
+ g_autoptr(GString) buf = g_string_new(NULL);
+ g_autoptr(GString) tid = g_string_new(NULL);
+ const char *type;
+ int ret;
+
+ if (running || gdbserver_state.state == RS_INACTIVE) {
+ return;
+ }
+
+ /* Is there a GDB syscall waiting to be sent? */
+ if (gdb_handled_syscall()) {
+ return;
+ }
+
+ if (cpu == NULL) {
+ /* No process attached */
+ return;
+ }
+
+ if (!gdbserver_state.allow_stop_reply) {
+ return;
+ }
+
+ gdb_append_thread_id(cpu, tid);
+
+ switch (state) {
+ case RUN_STATE_DEBUG:
+ if (cpu->watchpoint_hit) {
+ switch (cpu->watchpoint_hit->flags & BP_MEM_ACCESS) {
+ case BP_MEM_READ:
+ type = "r";
+ break;
+ case BP_MEM_ACCESS:
+ type = "a";
+ break;
+ default:
+ type = "";
+ break;
+ }
+ trace_gdbstub_hit_watchpoint(type,
+ gdb_get_cpu_index(cpu),
+ cpu->watchpoint_hit->vaddr);
+ g_string_printf(buf, "T%02xthread:%s;%swatch:%" VADDR_PRIx ";",
+ GDB_SIGNAL_TRAP, tid->str, type,
+ cpu->watchpoint_hit->vaddr);
+ cpu->watchpoint_hit = NULL;
+ goto send_packet;
+ } else {
+ trace_gdbstub_hit_break();
+ }
+ if (tcg_enabled()) {
+ tb_flush(cpu);
+ }
+ ret = GDB_SIGNAL_TRAP;
+ break;
+ case RUN_STATE_PAUSED:
+ trace_gdbstub_hit_paused();
+ ret = GDB_SIGNAL_INT;
+ break;
+ case RUN_STATE_SHUTDOWN:
+ trace_gdbstub_hit_shutdown();
+ ret = GDB_SIGNAL_QUIT;
+ break;
+ case RUN_STATE_IO_ERROR:
+ trace_gdbstub_hit_io_error();
+ ret = GDB_SIGNAL_STOP;
+ break;
+ case RUN_STATE_WATCHDOG:
+ trace_gdbstub_hit_watchdog();
+ ret = GDB_SIGNAL_ALRM;
+ break;
+ case RUN_STATE_INTERNAL_ERROR:
+ trace_gdbstub_hit_internal_error();
+ ret = GDB_SIGNAL_ABRT;
+ break;
+ case RUN_STATE_SAVE_VM:
+ case RUN_STATE_RESTORE_VM:
+ return;
+ case RUN_STATE_FINISH_MIGRATE:
+ ret = GDB_SIGNAL_XCPU;
+ break;
+ default:
+ trace_gdbstub_hit_unknown(state);
+ ret = GDB_SIGNAL_UNKNOWN;
+ break;
+ }
+ gdb_set_stop_cpu(cpu);
+ g_string_printf(buf, "T%02xthread:%s;", ret, tid->str);
+
+send_packet:
+ gdb_put_packet(buf->str);
+ gdbserver_state.allow_stop_reply = false;
+
+ /* disable single step if it was enabled */
+ cpu_single_step(cpu, 0);
+}
+
+#ifndef _WIN32
+static void gdb_sigterm_handler(int signal)
+{
+ if (runstate_is_running()) {
+ vm_stop(RUN_STATE_PAUSED);
+ }
+}
+#endif
+
+static int gdb_monitor_write(Chardev *chr, const uint8_t *buf, int len)
+{
+ g_autoptr(GString) hex_buf = g_string_new("O");
+ gdb_memtohex(hex_buf, buf, len);
+ gdb_put_packet(hex_buf->str);
+ return len;
+}
+
+static void gdb_monitor_open(Chardev *chr, ChardevBackend *backend,
+ bool *be_opened, Error **errp)
+{
+ *be_opened = false;
+}
+
+static void char_gdb_class_init(ObjectClass *oc, const void *data)
+{
+ ChardevClass *cc = CHARDEV_CLASS(oc);
+
+ cc->internal = true;
+ cc->open = gdb_monitor_open;
+ cc->chr_write = gdb_monitor_write;
+}
+
+#define TYPE_CHARDEV_GDB "chardev-gdb"
+
+static const TypeInfo char_gdb_type_info = {
+ .name = TYPE_CHARDEV_GDB,
+ .parent = TYPE_CHARDEV,
+ .class_init = char_gdb_class_init,
+};
+
+static int gdb_chr_can_receive(void *opaque)
+{
+ /*
+ * We can handle an arbitrarily large amount of data.
+ * Pick the maximum packet size, which is as good as anything.
+ */
+ return MAX_PACKET_LENGTH;
+}
+
+static void gdb_chr_receive(void *opaque, const uint8_t *buf, int size)
+{
+ int i;
+
+ for (i = 0; i < size; i++) {
+ gdb_read_byte(buf[i]);
+ }
+}
+
+static int find_cpu_clusters(Object *child, void *opaque)
+{
+ if (object_dynamic_cast(child, TYPE_CPU_CLUSTER)) {
+ GDBState *s = (GDBState *) opaque;
+ CPUClusterState *cluster = CPU_CLUSTER(child);
+ GDBProcess *process;
+
+ s->processes = g_renew(GDBProcess, s->processes, ++s->process_num);
+
+ process = &s->processes[s->process_num - 1];
+
+ /*
+ * GDB process IDs -1 and 0 are reserved. To avoid subtle errors at
+ * runtime, we enforce here that the machine does not use a cluster ID
+ * that would lead to PID 0.
+ */
+ assert(cluster->cluster_id != UINT32_MAX);
+ process->pid = cluster->cluster_id + 1;
+ process->attached = false;
+ process->target_xml = NULL;
+
+ return 0;
+ }
+
+ return object_child_foreach(child, find_cpu_clusters, opaque);
+}
+
+static int pid_order(const void *a, const void *b)
+{
+ GDBProcess *pa = (GDBProcess *) a;
+ GDBProcess *pb = (GDBProcess *) b;
+
+ if (pa->pid < pb->pid) {
+ return -1;
+ } else if (pa->pid > pb->pid) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+static void create_processes(GDBState *s)
+{
+ object_child_foreach(object_get_root(), find_cpu_clusters, s);
+
+ if (gdbserver_state.processes) {
+ /* Sort by PID */
+ qsort(gdbserver_state.processes,
+ gdbserver_state.process_num,
+ sizeof(gdbserver_state.processes[0]),
+ pid_order);
+ }
+
+ gdb_create_default_process(s);
+}
+
+bool gdbserver_start(const char *device, Error **errp)
+{
+ Chardev *chr = NULL;
+ Chardev *mon_chr;
+ g_autoptr(GString) cs = g_string_new(device);
+
+ if (!first_cpu) {
+ error_setg(errp, "gdbstub: meaningless to attach gdb to a "
+ "machine without any CPU.");
+ return false;
+ }
+
+ if (!gdb_supports_guest_debug()) {
+ error_setg(errp, "gdbstub: current accelerator doesn't "
+ "support guest debugging");
+ return false;
+ }
+
+ if (cs->len == 0) {
+ error_setg(errp, "gdbstub: missing connection string");
+ return false;
+ }
+
+ trace_gdbstub_op_start(cs->str);
+
+ if (g_strcmp0(cs->str, "none") != 0) {
+ if (g_str_has_prefix(cs->str, "tcp:")) {
+ /* enforce required TCP attributes */
+ g_string_append_printf(cs, ",wait=off,nodelay=on,server=on");
+ }
+#ifndef _WIN32
+ else if (strcmp(device, "stdio") == 0) {
+ struct sigaction act;
+
+ memset(&act, 0, sizeof(act));
+ act.sa_handler = gdb_sigterm_handler;
+ sigaction(SIGINT, &act, NULL);
+ }
+#endif
+ /*
+ * FIXME: it's a bit weird to allow using a mux chardev here
+ * and implicitly setup a monitor. We may want to break this.
+ */
+ chr = qemu_chr_new_noreplay("gdb", cs->str, true, NULL);
+ if (!chr) {
+ error_setg(errp, "gdbstub: couldn't create chardev");
+ return false;
+ }
+ }
+
+ if (!gdbserver_state.init) {
+ gdb_init_gdbserver_state();
+
+ qemu_add_vm_change_state_handler(gdb_vm_state_change, NULL);
+
+ /* Initialize a monitor terminal for gdb */
+ mon_chr = qemu_chardev_new(NULL, TYPE_CHARDEV_GDB,
+ NULL, NULL, &error_abort);
+ monitor_init_hmp(mon_chr, false, &error_abort);
+ } else {
+ qemu_chr_fe_deinit(&gdbserver_system_state.chr, true);
+ mon_chr = gdbserver_system_state.mon_chr;
+ reset_gdbserver_state();
+ }
+
+ create_processes(&gdbserver_state);
+
+ if (chr) {
+ qemu_chr_fe_init(&gdbserver_system_state.chr, chr, &error_abort);
+ qemu_chr_fe_set_handlers(&gdbserver_system_state.chr,
+ gdb_chr_can_receive,
+ gdb_chr_receive, gdb_chr_event,
+ NULL, &gdbserver_state, NULL, true);
+ }
+ gdbserver_state.state = chr ? RS_IDLE : RS_INACTIVE;
+ gdbserver_system_state.mon_chr = mon_chr;
+ gdb_syscall_reset();
+
+ return true;
+}
+
+static void register_types(void)
+{
+ type_register_static(&char_gdb_type_info);
+}
+
+type_init(register_types);
+
+/* Tell the remote gdb that the process has exited. */
+void gdb_exit(int code)
+{
+ char buf[4];
+
+ if (!gdbserver_state.init) {
+ return;
+ }
+
+ trace_gdbstub_op_exiting((uint8_t)code);
+
+ if (gdbserver_state.allow_stop_reply) {
+ snprintf(buf, sizeof(buf), "W%02x", (uint8_t)code);
+ gdb_put_packet(buf);
+ gdbserver_state.allow_stop_reply = false;
+ }
+
+ qemu_chr_fe_deinit(&gdbserver_system_state.chr, true);
+}
+
+void gdb_qemu_exit(int code)
+{
+ qemu_system_shutdown_request_with_code(SHUTDOWN_CAUSE_GUEST_SHUTDOWN,
+ code);
+}
+
+/*
+ * Memory access
+ */
+static int phy_memory_mode;
+
+int gdb_target_memory_rw_debug(CPUState *cpu, hwaddr addr,
+ uint8_t *buf, int len, bool is_write)
+{
+ if (phy_memory_mode) {
+ if (is_write) {
+ cpu_physical_memory_write(addr, buf, len);
+ } else {
+ cpu_physical_memory_read(addr, buf, len);
+ }
+ return 0;
+ }
+
+ if (cpu->cc->memory_rw_debug) {
+ return cpu->cc->memory_rw_debug(cpu, addr, buf, len, is_write);
+ }
+
+ return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);
+}
+
+/*
+ * cpu helpers
+ */
+
+unsigned int gdb_get_max_cpus(void)
+{
+ MachineState *ms = MACHINE(qdev_get_machine());
+ return ms->smp.max_cpus;
+}
+
+bool gdb_can_reverse(void)
+{
+ return replay_mode == REPLAY_MODE_PLAY;
+}
+
+/*
+ * Softmmu specific command helpers
+ */
+
+void gdb_handle_query_qemu_phy_mem_mode(GArray *params,
+ void *ctx)
+{
+ g_string_printf(gdbserver_state.str_buf, "%d", phy_memory_mode);
+ gdb_put_strbuf();
+}
+
+void gdb_handle_set_qemu_phy_mem_mode(GArray *params, void *ctx)
+{
+ if (!params->len) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ if (!gdb_get_cmd_param(params, 0)->val_ul) {
+ phy_memory_mode = 0;
+ } else {
+ phy_memory_mode = 1;
+ }
+ gdb_put_packet("OK");
+}
+
+void gdb_handle_query_rcmd(GArray *params, void *ctx)
+{
+ const guint8 zero = 0;
+ int len;
+
+ if (!params->len) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ len = strlen(gdb_get_cmd_param(params, 0)->data);
+ if (len % 2) {
+ gdb_put_packet("E01");
+ return;
+ }
+
+ g_assert(gdbserver_state.mem_buf->len == 0);
+ len = len / 2;
+ gdb_hextomem(gdbserver_state.mem_buf, gdb_get_cmd_param(params, 0)->data, len);
+ g_byte_array_append(gdbserver_state.mem_buf, &zero, 1);
+ qemu_chr_be_write(gdbserver_system_state.mon_chr,
+ gdbserver_state.mem_buf->data,
+ gdbserver_state.mem_buf->len);
+ gdb_put_packet("OK");
+}
+
+/*
+ * Execution state helpers
+ */
+
+void gdb_handle_query_attached(GArray *params, void *ctx)
+{
+ gdb_put_packet("1");
+}
+
+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
+};
+
+int gdb_signal_to_target(int sig)
+{
+ switch (sig) {
+ case 2:
+ return TARGET_SIGINT;
+ case 5:
+ return TARGET_SIGTRAP;
+ default:
+ return -1;
+ }
+}
+
+/*
+ * Break/Watch point helpers
+ */
+
+bool gdb_supports_guest_debug(void)
+{
+ const AccelOpsClass *ops = cpus_get_accel();
+ if (ops->supports_guest_debug) {
+ return ops->supports_guest_debug();
+ }
+ return false;
+}
+
+int gdb_breakpoint_insert(CPUState *cs, int type, vaddr addr, vaddr len)
+{
+ const AccelOpsClass *ops = cpus_get_accel();
+ if (ops->insert_breakpoint) {
+ return ops->insert_breakpoint(cs, type, addr, len);
+ }
+ return -ENOSYS;
+}
+
+int gdb_breakpoint_remove(CPUState *cs, int type, vaddr addr, vaddr len)
+{
+ const AccelOpsClass *ops = cpus_get_accel();
+ if (ops->remove_breakpoint) {
+ return ops->remove_breakpoint(cs, type, addr, len);
+ }
+ return -ENOSYS;
+}
+
+void gdb_breakpoint_remove_all(CPUState *cs)
+{
+ const AccelOpsClass *ops = cpus_get_accel();
+ if (ops->remove_all_breakpoints) {
+ ops->remove_all_breakpoints(cs);
+ }
+}
diff --git a/gdbstub/trace-events b/backup/trace-events
similarity index 100%
rename from gdbstub/trace-events
rename to backup/trace-events
diff --git a/backup/trace.h b/backup/trace.h
new file mode 100644
index 0000000..dee87b1
--- /dev/null
+++ b/backup/trace.h
@@ -0,0 +1 @@
+#include "trace/trace-gdbstub.h"
diff --git a/backup/user-target.c b/backup/user-target.c
new file mode 100644
index 0000000..43231e6
--- /dev/null
+++ b/backup/user-target.c
@@ -0,0 +1,424 @@
+/*
+ * Target specific user-mode handling
+ *
+ * Copyright (c) 2003-2005 Fabrice Bellard
+ * Copyright (c) 2022 Linaro Ltd
+ *
+ * SPDX-License-Identifier: LGPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "exec/gdbstub.h"
+#include "gdbstub/commands.h"
+#include "qemu.h"
+#include "internals.h"
+#ifdef CONFIG_LINUX
+#include "linux-user/loader.h"
+#include "linux-user/qemu.h"
+#endif
+
+/*
+ * Map target signal numbers to GDB protocol signal numbers and vice
+ * versa. For user emulation's currently supported systems, we can
+ * assume most signals are defined.
+ */
+
+static int gdb_signal_table[] = {
+ 0,
+ TARGET_SIGHUP,
+ TARGET_SIGINT,
+ TARGET_SIGQUIT,
+ TARGET_SIGILL,
+ TARGET_SIGTRAP,
+ TARGET_SIGABRT,
+ -1, /* SIGEMT */
+ TARGET_SIGFPE,
+ TARGET_SIGKILL,
+ TARGET_SIGBUS,
+ TARGET_SIGSEGV,
+ TARGET_SIGSYS,
+ TARGET_SIGPIPE,
+ TARGET_SIGALRM,
+ TARGET_SIGTERM,
+ TARGET_SIGURG,
+ TARGET_SIGSTOP,
+ TARGET_SIGTSTP,
+ TARGET_SIGCONT,
+ TARGET_SIGCHLD,
+ TARGET_SIGTTIN,
+ TARGET_SIGTTOU,
+ TARGET_SIGIO,
+ TARGET_SIGXCPU,
+ TARGET_SIGXFSZ,
+ TARGET_SIGVTALRM,
+ TARGET_SIGPROF,
+ TARGET_SIGWINCH,
+ -1, /* SIGLOST */
+ TARGET_SIGUSR1,
+ TARGET_SIGUSR2,
+#ifdef TARGET_SIGPWR
+ TARGET_SIGPWR,
+#else
+ -1,
+#endif
+ -1, /* SIGPOLL */
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+#ifdef __SIGRTMIN
+ __SIGRTMIN + 1,
+ __SIGRTMIN + 2,
+ __SIGRTMIN + 3,
+ __SIGRTMIN + 4,
+ __SIGRTMIN + 5,
+ __SIGRTMIN + 6,
+ __SIGRTMIN + 7,
+ __SIGRTMIN + 8,
+ __SIGRTMIN + 9,
+ __SIGRTMIN + 10,
+ __SIGRTMIN + 11,
+ __SIGRTMIN + 12,
+ __SIGRTMIN + 13,
+ __SIGRTMIN + 14,
+ __SIGRTMIN + 15,
+ __SIGRTMIN + 16,
+ __SIGRTMIN + 17,
+ __SIGRTMIN + 18,
+ __SIGRTMIN + 19,
+ __SIGRTMIN + 20,
+ __SIGRTMIN + 21,
+ __SIGRTMIN + 22,
+ __SIGRTMIN + 23,
+ __SIGRTMIN + 24,
+ __SIGRTMIN + 25,
+ __SIGRTMIN + 26,
+ __SIGRTMIN + 27,
+ __SIGRTMIN + 28,
+ __SIGRTMIN + 29,
+ __SIGRTMIN + 30,
+ __SIGRTMIN + 31,
+ -1, /* SIGCANCEL */
+ __SIGRTMIN,
+ __SIGRTMIN + 32,
+ __SIGRTMIN + 33,
+ __SIGRTMIN + 34,
+ __SIGRTMIN + 35,
+ __SIGRTMIN + 36,
+ __SIGRTMIN + 37,
+ __SIGRTMIN + 38,
+ __SIGRTMIN + 39,
+ __SIGRTMIN + 40,
+ __SIGRTMIN + 41,
+ __SIGRTMIN + 42,
+ __SIGRTMIN + 43,
+ __SIGRTMIN + 44,
+ __SIGRTMIN + 45,
+ __SIGRTMIN + 46,
+ __SIGRTMIN + 47,
+ __SIGRTMIN + 48,
+ __SIGRTMIN + 49,
+ __SIGRTMIN + 50,
+ __SIGRTMIN + 51,
+ __SIGRTMIN + 52,
+ __SIGRTMIN + 53,
+ __SIGRTMIN + 54,
+ __SIGRTMIN + 55,
+ __SIGRTMIN + 56,
+ __SIGRTMIN + 57,
+ __SIGRTMIN + 58,
+ __SIGRTMIN + 59,
+ __SIGRTMIN + 60,
+ __SIGRTMIN + 61,
+ __SIGRTMIN + 62,
+ __SIGRTMIN + 63,
+ __SIGRTMIN + 64,
+ __SIGRTMIN + 65,
+ __SIGRTMIN + 66,
+ __SIGRTMIN + 67,
+ __SIGRTMIN + 68,
+ __SIGRTMIN + 69,
+ __SIGRTMIN + 70,
+ __SIGRTMIN + 71,
+ __SIGRTMIN + 72,
+ __SIGRTMIN + 73,
+ __SIGRTMIN + 74,
+ __SIGRTMIN + 75,
+ __SIGRTMIN + 76,
+ __SIGRTMIN + 77,
+ __SIGRTMIN + 78,
+ __SIGRTMIN + 79,
+ __SIGRTMIN + 80,
+ __SIGRTMIN + 81,
+ __SIGRTMIN + 82,
+ __SIGRTMIN + 83,
+ __SIGRTMIN + 84,
+ __SIGRTMIN + 85,
+ __SIGRTMIN + 86,
+ __SIGRTMIN + 87,
+ __SIGRTMIN + 88,
+ __SIGRTMIN + 89,
+ __SIGRTMIN + 90,
+ __SIGRTMIN + 91,
+ __SIGRTMIN + 92,
+ __SIGRTMIN + 93,
+ __SIGRTMIN + 94,
+ __SIGRTMIN + 95,
+ -1, /* SIGINFO */
+ -1, /* UNKNOWN */
+ -1, /* DEFAULT */
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+ -1
+#endif
+};
+
+int gdb_signal_to_target(int sig)
+{
+ if (sig < ARRAY_SIZE(gdb_signal_table)) {
+ return gdb_signal_table[sig];
+ } else {
+ return -1;
+ }
+}
+
+int gdb_target_signal_to_gdb(int sig)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(gdb_signal_table); i++) {
+ if (gdb_signal_table[i] == sig) {
+ return i;
+ }
+ }
+ return GDB_SIGNAL_UNKNOWN;
+}
+
+int gdb_get_cpu_index(CPUState *cpu)
+{
+ TaskState *ts = get_task_state(cpu);
+ return ts ? ts->ts_tid : -1;
+}
+
+/*
+ * User-mode specific command helpers
+ */
+
+void gdb_handle_query_offsets(GArray *params, void *user_ctx)
+{
+ TaskState *ts;
+
+ ts = get_task_state(gdbserver_state.c_cpu);
+ g_string_printf(gdbserver_state.str_buf,
+ "Text=" TARGET_ABI_FMT_lx
+ ";Data=" TARGET_ABI_FMT_lx
+ ";Bss=" TARGET_ABI_FMT_lx,
+ ts->info->code_offset,
+ ts->info->data_offset,
+ ts->info->data_offset);
+ gdb_put_strbuf();
+}
+
+#if defined(CONFIG_LINUX)
+/* Partial user only duplicate of helper in gdbstub.c */
+static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr,
+ uint8_t *buf, int len, bool is_write)
+{
+ if (cpu->cc->memory_rw_debug) {
+ return cpu->cc->memory_rw_debug(cpu, addr, buf, len, is_write);
+ }
+ return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);
+}
+
+void gdb_handle_query_xfer_auxv(GArray *params, void *user_ctx)
+{
+ TaskState *ts;
+ unsigned long offset, len, saved_auxv, auxv_len;
+
+ if (params->len < 2) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ offset = gdb_get_cmd_param(params, 0)->val_ul;
+ len = gdb_get_cmd_param(params, 1)->val_ul;
+ ts = get_task_state(gdbserver_state.c_cpu);
+ saved_auxv = ts->info->saved_auxv;
+ auxv_len = ts->info->auxv_len;
+
+ if (offset >= auxv_len) {
+ gdb_put_packet("E00");
+ return;
+ }
+
+ if (len > (MAX_PACKET_LENGTH - 5) / 2) {
+ len = (MAX_PACKET_LENGTH - 5) / 2;
+ }
+
+ if (len < auxv_len - offset) {
+ g_string_assign(gdbserver_state.str_buf, "m");
+ } else {
+ g_string_assign(gdbserver_state.str_buf, "l");
+ len = auxv_len - offset;
+ }
+
+ g_byte_array_set_size(gdbserver_state.mem_buf, len);
+ if (target_memory_rw_debug(gdbserver_state.g_cpu, saved_auxv + offset,
+ gdbserver_state.mem_buf->data, len, false)) {
+ gdb_put_packet("E14");
+ return;
+ }
+
+ gdb_memtox(gdbserver_state.str_buf,
+ (const char *)gdbserver_state.mem_buf->data, len);
+ gdb_put_packet_binary(gdbserver_state.str_buf->str,
+ gdbserver_state.str_buf->len, true);
+}
+#endif
+
+static const char *get_filename_param(GArray *params, int i)
+{
+ const char *hex_filename = gdb_get_cmd_param(params, i)->data;
+ gdb_hextomem(gdbserver_state.mem_buf, hex_filename,
+ strlen(hex_filename) / 2);
+ g_byte_array_append(gdbserver_state.mem_buf, (const guint8 *)"", 1);
+ return (const char *)gdbserver_state.mem_buf->data;
+}
+
+static void hostio_reply_with_data(const void *buf, size_t n)
+{
+ g_string_printf(gdbserver_state.str_buf, "F%zx;", n);
+ gdb_memtox(gdbserver_state.str_buf, buf, n);
+ gdb_put_packet_binary(gdbserver_state.str_buf->str,
+ gdbserver_state.str_buf->len, true);
+}
+
+void gdb_handle_v_file_open(GArray *params, void *user_ctx)
+{
+ const char *filename = get_filename_param(params, 0);
+ uint64_t flags = gdb_get_cmd_param(params, 1)->val_ull;
+ uint64_t mode = gdb_get_cmd_param(params, 2)->val_ull;
+
+#ifdef CONFIG_LINUX
+ int fd = do_guest_openat(cpu_env(gdbserver_state.g_cpu), 0, filename,
+ flags, mode, false);
+#else
+ int fd = open(filename, flags, mode);
+#endif
+ if (fd < 0) {
+ g_string_printf(gdbserver_state.str_buf, "F-1,%x", errno);
+ } else {
+ g_string_printf(gdbserver_state.str_buf, "F%x", fd);
+ }
+ gdb_put_strbuf();
+}
+
+void gdb_handle_v_file_close(GArray *params, void *user_ctx)
+{
+ int fd = gdb_get_cmd_param(params, 0)->val_ul;
+
+ if (close(fd) == -1) {
+ g_string_printf(gdbserver_state.str_buf, "F-1,%x", errno);
+ gdb_put_strbuf();
+ return;
+ }
+
+ gdb_put_packet("F00");
+}
+
+void gdb_handle_v_file_pread(GArray *params, void *user_ctx)
+{
+ int fd = gdb_get_cmd_param(params, 0)->val_ul;
+ size_t count = gdb_get_cmd_param(params, 1)->val_ull;
+ off_t offset = gdb_get_cmd_param(params, 2)->val_ull;
+
+ size_t bufsiz = MIN(count, BUFSIZ);
+ g_autofree char *buf = g_try_malloc(bufsiz);
+ if (buf == NULL) {
+ gdb_put_packet("E12");
+ return;
+ }
+
+ ssize_t n = pread(fd, buf, bufsiz, offset);
+ if (n < 0) {
+ g_string_printf(gdbserver_state.str_buf, "F-1,%x", errno);
+ gdb_put_strbuf();
+ return;
+ }
+ hostio_reply_with_data(buf, n);
+}
+
+void gdb_handle_v_file_readlink(GArray *params, void *user_ctx)
+{
+ const char *filename = get_filename_param(params, 0);
+
+ g_autofree char *buf = g_try_malloc(BUFSIZ);
+ if (buf == NULL) {
+ gdb_put_packet("E12");
+ return;
+ }
+
+#ifdef CONFIG_LINUX
+ ssize_t n = do_guest_readlink(filename, buf, BUFSIZ);
+#else
+ ssize_t n = readlink(filename, buf, BUFSIZ);
+#endif
+ if (n < 0) {
+ g_string_printf(gdbserver_state.str_buf, "F-1,%x", errno);
+ gdb_put_strbuf();
+ return;
+ }
+ hostio_reply_with_data(buf, n);
+}
+
+void gdb_handle_query_xfer_exec_file(GArray *params, void *user_ctx)
+{
+ uint32_t pid = gdb_get_cmd_param(params, 0)->val_ul;
+ uint32_t offset = gdb_get_cmd_param(params, 1)->val_ul;
+ uint32_t length = gdb_get_cmd_param(params, 2)->val_ul;
+
+ GDBProcess *process = gdb_get_process(pid);
+ if (!process) {
+ gdb_put_packet("E00");
+ return;
+ }
+
+ CPUState *cpu = gdb_get_first_cpu_in_process(process);
+ if (!cpu) {
+ gdb_put_packet("E00");
+ return;
+ }
+
+ TaskState *ts = get_task_state(cpu);
+ if (!ts || !ts->bprm || !ts->bprm->filename) {
+ gdb_put_packet("E00");
+ return;
+ }
+
+ size_t total_length = strlen(ts->bprm->filename);
+ if (offset > total_length) {
+ gdb_put_packet("E00");
+ return;
+ }
+ if (offset + length > total_length) {
+ length = total_length - offset;
+ }
+
+ g_string_printf(gdbserver_state.str_buf, "l%.*s", length,
+ ts->bprm->filename + offset);
+ gdb_put_strbuf();
+}
+
+int gdb_target_sigtrap(void)
+{
+ return TARGET_SIGTRAP;
+}
diff --git a/gdbstub/user.c b/backup/user.c
similarity index 100%
rename from gdbstub/user.c
rename to backup/user.c
diff --git a/gdbstub/user.h b/backup/user.h
similarity index 100%
rename from gdbstub/user.h
rename to backup/user.h
diff --git a/gdbstub/gdbstub.h b/gdbstub/gdbstub.h
new file mode 100644
index 0000000..a16c005
--- /dev/null
+++ b/gdbstub/gdbstub.h
@@ -0,0 +1,164 @@
+#ifndef GDBSTUB_H
+#define GDBSTUB_H
+
+typedef struct GDBFeature {
+ const char *xmlname;
+ const char *xml;
+ const char *name;
+ const char * const *regs;
+ int num_regs;
+} GDBFeature;
+
+typedef struct GDBFeatureBuilder {
+ GDBFeature *feature;
+ GPtrArray *xml;
+ GPtrArray *regs;
+ int base_reg;
+} GDBFeatureBuilder;
+
+
+/* Get or set a register. Returns the size of the register. */
+typedef int (*gdb_get_reg_cb)(CPUState *cpu, GByteArray *buf, int reg);
+typedef int (*gdb_set_reg_cb)(CPUState *cpu, uint8_t *buf, int reg);
+
+/**
+ * gdb_init_cpu(): Initialize the CPU for gdbstub.
+ * @cpu: The CPU to be initialized.
+ */
+void gdb_init_cpu(CPUState *cpu);
+
+/**
+ * gdb_register_coprocessor() - register a supplemental set of registers
+ * @cpu - the CPU associated with registers
+ * @get_reg - get function (gdb reading)
+ * @set_reg - set function (gdb modifying)
+ * @num_regs - number of registers in set
+ * @xml - xml name of set
+ * @gpos - non-zero to append to "general" register set at @gpos
+ */
+void gdb_register_coprocessor(CPUState *cpu,
+ gdb_get_reg_cb get_reg, gdb_set_reg_cb set_reg,
+ const GDBFeature *feature, int g_pos);
+
+/**
+ * gdb_unregister_coprocessor_all() - unregisters supplemental set of registers
+ * @cpu - the CPU associated with registers
+ */
+void gdb_unregister_coprocessor_all(CPUState *cpu);
+
+/**
+ * gdbserver_start: start the gdb server
+ * @port_or_device: connection spec for gdb
+ * @errp: error handle
+ *
+ * For CONFIG_USER this is either a tcp port or a path to a fifo. For
+ * system emulation you can use a full chardev spec for your gdbserver
+ * port.
+ *
+ * The error handle should be either &error_fatal (for start-up) or
+ * &error_warn (for QMP/HMP initiated sessions).
+ *
+ * Returns true when server successfully started.
+ */
+bool gdbserver_start(const char *port_or_device, Error **errp);
+
+/**
+ * gdb_feature_builder_init() - Initialize GDBFeatureBuilder.
+ * @builder: The builder to be initialized.
+ * @feature: The feature to be filled.
+ * @name: The name of the feature.
+ * @xmlname: The name of the XML.
+ * @base_reg: The base number of the register ID.
+ */
+void gdb_feature_builder_init(GDBFeatureBuilder *builder, GDBFeature *feature,
+ const char *name, const char *xmlname,
+ int base_reg);
+
+/**
+ * gdb_feature_builder_append_tag() - Append a tag.
+ * @builder: The builder.
+ * @format: The format of the tag.
+ * @...: The values to be formatted.
+ */
+void G_GNUC_PRINTF(2, 3)
+gdb_feature_builder_append_tag(const GDBFeatureBuilder *builder,
+ const char *format, ...);
+
+/**
+ * gdb_feature_builder_append_reg() - Append a register.
+ * @builder: The builder.
+ * @name: The register's name; it must be unique within a CPU.
+ * @bitsize: The register's size, in bits.
+ * @regnum: The offset of the register's number in the feature.
+ * @type: The type of the register.
+ * @group: The register group to which this register belongs; it can be NULL.
+ */
+void gdb_feature_builder_append_reg(const GDBFeatureBuilder *builder,
+ const char *name,
+ int bitsize,
+ int regnum,
+ const char *type,
+ const char *group);
+
+/**
+ * gdb_feature_builder_end() - End building GDBFeature.
+ * @builder: The builder.
+ */
+void gdb_feature_builder_end(const GDBFeatureBuilder *builder);
+
+/**
+ * gdb_find_static_feature() - Find a static feature.
+ * @xmlname: The name of the XML.
+ *
+ * Return: The static feature.
+ */
+const GDBFeature *gdb_find_static_feature(const char *xmlname);
+
+/**
+ * gdb_read_register() - Read a register associated with a CPU.
+ * @cpu: The CPU associated with the register.
+ * @buf: The buffer that the read register will be appended to.
+ * @reg: The register's number returned by gdb_find_feature_register().
+ *
+ * Return: The number of read bytes.
+ */
+int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
+
+/**
+ * gdb_write_register() - Write a register associated with a CPU.
+ * @cpu: The CPU associated with the register.
+ * @buf: The buffer that the register contents will be set to.
+ * @reg: The register's number returned by gdb_find_feature_register().
+ *
+ * The size of @buf must be at least the size of the register being
+ * written.
+ *
+ * Return: The number of written bytes, or 0 if an error occurred (for
+ * example, an unknown register was provided).
+ */
+int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg);
+
+/**
+ * typedef GDBRegDesc - a register description from gdbstub
+ */
+typedef struct {
+ int gdb_reg;
+ const char *name;
+ const char *feature_name;
+} GDBRegDesc;
+
+/**
+ * gdb_get_register_list() - Return list of all registers for CPU
+ * @cpu: The CPU being searched
+ *
+ * Returns a GArray of GDBRegDesc, caller frees array but not the
+ * const strings.
+ */
+GArray *gdb_get_register_list(CPUState *cpu);
+
+void gdb_set_stop_cpu(CPUState *cpu);
+
+/* in gdbstub-xml.c, generated by scripts/feature_to_c.py */
+extern const GDBFeature gdb_static_features[];
+
+#endif /* GDBSTUB_H */