/*
* 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
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-2.0+
*/
#include "qemu/osdep.h"
#include "sysemu/sysemu.h"
#include "exec/gdbstub.h"
#include "hw/cpu/cluster.h"
+#include "hw/boards.h"
#endif
#define MAX_PACKET_LENGTH 4096
#include "qemu/sockets.h"
#include "sysemu/hw_accel.h"
#include "sysemu/kvm.h"
+#include "sysemu/runstate.h"
#include "hw/semihosting/semihost.h"
#include "exec/exec-all.h"
#define GDB_ATTACHED "1"
#endif
+#ifndef CONFIG_USER_ONLY
+static int phy_memory_mode;
+#endif
+
static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr,
uint8_t *buf, int len, bool is_write)
{
- CPUClass *cc = CPU_GET_CLASS(cpu);
+ CPUClass *cc;
+
+#ifndef CONFIG_USER_ONLY
+ if (phy_memory_mode) {
+ if (is_write) {
+ cpu_physical_memory_write(addr, buf, len);
+ } else {
+ cpu_physical_memory_read(addr, buf, len);
+ }
+ return 0;
+ }
+#endif
+ cc = CPU_GET_CLASS(cpu);
if (cc->memory_rw_debug) {
return cc->memory_rw_debug(cpu, addr, buf, len, is_write);
}
typedef struct GDBRegisterState {
int base_reg;
int num_regs;
- gdb_reg_cb get_reg;
- gdb_reg_cb set_reg;
+ gdb_get_reg_cb get_reg;
+ gdb_set_reg_cb set_reg;
const char *xml;
struct GDBRegisterState *next;
} GDBRegisterState;
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 */
int line_buf_index;
int line_sum; /* running checksum */
int line_csum; /* checksum at the end of the packet */
- uint8_t last_packet[MAX_PACKET_LENGTH + 4];
- int last_packet_len;
+ GByteArray *last_packet;
int signal;
#ifdef CONFIG_USER_ONLY
int fd;
int process_num;
char syscall_buf[256];
gdb_syscall_complete_cb current_syscall_cb;
+ GString *str_buf;
+ GByteArray *mem_buf;
} GDBState;
/* By default use no IRQs and no timers while single stepping so as to
*/
static int sstep_flags = SSTEP_ENABLE|SSTEP_NOIRQ|SSTEP_NOTIMER;
-static GDBState *gdbserver_state;
+static GDBState gdbserver_state;
+
+static void 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);
+}
+
+#ifndef CONFIG_USER_ONLY
+static void reset_gdbserver_state(void)
+{
+ g_free(gdbserver_state.processes);
+ gdbserver_state.processes = NULL;
+ gdbserver_state.process_num = 0;
+}
+#endif
bool gdb_has_xml;
/* XXX: This is not thread safe. Do we care? */
static int gdbserver_fd = -1;
-static int get_char(GDBState *s)
+static int get_char(void)
{
uint8_t ch;
int ret;
for(;;) {
- ret = qemu_recv(s->fd, &ch, 1, 0);
+ ret = qemu_recv(gdbserver_state.fd, &ch, 1, 0);
if (ret < 0) {
if (errno == ECONNRESET)
- s->fd = -1;
+ gdbserver_state.fd = -1;
if (errno != EINTR)
return -1;
} else if (ret == 0) {
- close(s->fd);
- s->fd = -1;
+ close(gdbserver_state.fd);
+ gdbserver_state.fd = -1;
return -1;
} else {
break;
/* -semihosting-config target=auto */
/* On the first call check if gdb is connected and remember. */
if (gdb_syscall_mode == GDB_SYS_UNKNOWN) {
- gdb_syscall_mode = (gdbserver_state ? GDB_SYS_ENABLED
- : GDB_SYS_DISABLED);
+ gdb_syscall_mode = gdbserver_state.init ?
+ GDB_SYS_ENABLED : GDB_SYS_DISABLED;
}
return gdb_syscall_mode == GDB_SYS_ENABLED;
}
/* Resume execution. */
-static inline void gdb_continue(GDBState *s)
+static inline void gdb_continue(void)
{
#ifdef CONFIG_USER_ONLY
- s->running_state = 1;
+ gdbserver_state.running_state = 1;
trace_gdbstub_op_continue();
#else
if (!runstate_needs_reset()) {
* Resume execution, per CPU actions. For user-mode emulation it's
* equivalent to gdb_continue.
*/
-static int gdb_continue_partial(GDBState *s, char *newstates)
+static int gdb_continue_partial(char *newstates)
{
CPUState *cpu;
int res = 0;
cpu_single_step(cpu, sstep_flags);
}
}
- s->running_state = 1;
+ gdbserver_state.running_state = 1;
#else
int flag = 0;
return res;
}
-static void put_buffer(GDBState *s, const uint8_t *buf, int len)
+static void put_buffer(const uint8_t *buf, int len)
{
#ifdef CONFIG_USER_ONLY
int ret;
while (len > 0) {
- ret = send(s->fd, buf, len, 0);
+ ret = send(gdbserver_state.fd, buf, len, 0);
if (ret < 0) {
if (errno != EINTR)
return;
#else
/* XXX this blocks entire thread. Rewrite to use
* qemu_chr_fe_write and background I/O callbacks */
- qemu_chr_fe_write_all(&s->chr, buf, len);
+ qemu_chr_fe_write_all(&gdbserver_state.chr, buf, len);
#endif
}
}
/* writes 2*len+1 bytes in buf */
-static void memtohex(char *buf, const uint8_t *mem, int len)
+static void memtohex(GString *buf, const uint8_t *mem, int len)
{
int i, c;
- char *q;
- q = buf;
for(i = 0; i < len; i++) {
c = mem[i];
- *q++ = tohex(c >> 4);
- *q++ = tohex(c & 0xf);
+ g_string_append_c(buf, tohex(c >> 4));
+ g_string_append_c(buf, tohex(c & 0xf));
}
- *q = '\0';
+ g_string_append_c(buf, '\0');
}
-static void hextomem(uint8_t *mem, const char *buf, int len)
+static void hextomem(GByteArray *mem, const char *buf, int len)
{
int i;
for(i = 0; i < len; i++) {
- mem[i] = (fromhex(buf[0]) << 4) | fromhex(buf[1]);
+ guint8 byte = fromhex(buf[0]) << 4 | fromhex(buf[1]);
+ g_byte_array_append(mem, &byte, 1);
buf += 2;
}
}
}
/* return -1 if error, 0 if OK */
-static int put_packet_binary(GDBState *s, const char *buf, int len, bool dump)
+static int put_packet_binary(const char *buf, int len, bool dump)
{
int csum, i;
- uint8_t *p;
+ uint8_t footer[3];
if (dump && trace_event_get_state_backends(TRACE_GDBSTUB_IO_BINARYREPLY)) {
hexdump(buf, len, trace_gdbstub_io_binaryreply);
}
for(;;) {
- p = s->last_packet;
- *(p++) = '$';
- memcpy(p, buf, len);
- p += len;
+ g_byte_array_set_size(gdbserver_state.last_packet, 0);
+ g_byte_array_append(gdbserver_state.last_packet,
+ (const uint8_t *) "$", 1);
+ g_byte_array_append(gdbserver_state.last_packet,
+ (const uint8_t *) buf, len);
csum = 0;
for(i = 0; i < len; i++) {
csum += buf[i];
}
- *(p++) = '#';
- *(p++) = tohex((csum >> 4) & 0xf);
- *(p++) = tohex((csum) & 0xf);
+ footer[0] = '#';
+ footer[1] = tohex((csum >> 4) & 0xf);
+ footer[2] = tohex((csum) & 0xf);
+ g_byte_array_append(gdbserver_state.last_packet, footer, 3);
- s->last_packet_len = p - s->last_packet;
- put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len);
+ put_buffer(gdbserver_state.last_packet->data,
+ gdbserver_state.last_packet->len);
#ifdef CONFIG_USER_ONLY
- i = get_char(s);
+ i = get_char();
if (i < 0)
return -1;
if (i == '+')
}
/* return -1 if error, 0 if OK */
-static int put_packet(GDBState *s, const char *buf)
+static int put_packet(const char *buf)
{
trace_gdbstub_io_reply(buf);
- return put_packet_binary(s, buf, strlen(buf), false);
+ return put_packet_binary(buf, strlen(buf), false);
+}
+
+static void put_strbuf(void)
+{
+ put_packet(gdbserver_state.str_buf->str);
}
/* Encode data using the encoding for 'x' packets. */
-static int memtox(char *buf, const char *mem, int len)
+static void memtox(GString *buf, const char *mem, int len)
{
- char *p = buf;
char c;
while (len--) {
c = *(mem++);
switch (c) {
case '#': case '$': case '*': case '}':
- *(p++) = '}';
- *(p++) = c ^ 0x20;
+ g_string_append_c(buf, '}');
+ g_string_append_c(buf, c ^ 0x20);
break;
default:
- *(p++) = c;
+ g_string_append_c(buf, c);
break;
}
}
- return p - buf;
}
-static uint32_t gdb_get_cpu_pid(const GDBState *s, CPUState *cpu)
+static uint32_t gdb_get_cpu_pid(CPUState *cpu)
{
/* TODO: In user mode, we should use the task state PID */
if (cpu->cluster_index == UNASSIGNED_CLUSTER_INDEX) {
/* Return the default process' PID */
- return s->processes[s->process_num - 1].pid;
+ int index = gdbserver_state.process_num - 1;
+ return gdbserver_state.processes[index].pid;
}
return cpu->cluster_index + 1;
}
-static GDBProcess *gdb_get_process(const GDBState *s, uint32_t pid)
+static GDBProcess *gdb_get_process(uint32_t pid)
{
int i;
if (!pid) {
/* 0 means any process, we take the first one */
- return &s->processes[0];
+ return &gdbserver_state.processes[0];
}
- for (i = 0; i < s->process_num; i++) {
- if (s->processes[i].pid == pid) {
- return &s->processes[i];
+ 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(const GDBState *s, CPUState *cpu)
+static GDBProcess *gdb_get_cpu_process(CPUState *cpu)
{
- return gdb_get_process(s, gdb_get_cpu_pid(s, cpu));
+ return gdb_get_process(gdb_get_cpu_pid(cpu));
}
static CPUState *find_cpu(uint32_t thread_id)
return NULL;
}
-static CPUState *get_first_cpu_in_process(const GDBState *s,
- GDBProcess *process)
+static CPUState *get_first_cpu_in_process(GDBProcess *process)
{
CPUState *cpu;
CPU_FOREACH(cpu) {
- if (gdb_get_cpu_pid(s, cpu) == process->pid) {
+ if (gdb_get_cpu_pid(cpu) == process->pid) {
return cpu;
}
}
return NULL;
}
-static CPUState *gdb_next_cpu_in_process(const GDBState *s, CPUState *cpu)
+static CPUState *gdb_next_cpu_in_process(CPUState *cpu)
{
- uint32_t pid = gdb_get_cpu_pid(s, cpu);
+ uint32_t pid = gdb_get_cpu_pid(cpu);
cpu = CPU_NEXT(cpu);
while (cpu) {
- if (gdb_get_cpu_pid(s, cpu) == pid) {
+ if (gdb_get_cpu_pid(cpu) == pid) {
break;
}
}
/* Return the cpu following @cpu, while ignoring unattached processes. */
-static CPUState *gdb_next_attached_cpu(const GDBState *s, CPUState *cpu)
+static CPUState *gdb_next_attached_cpu(CPUState *cpu)
{
cpu = CPU_NEXT(cpu);
while (cpu) {
- if (gdb_get_cpu_process(s, cpu)->attached) {
+ if (gdb_get_cpu_process(cpu)->attached) {
break;
}
}
/* Return the first attached cpu */
-static CPUState *gdb_first_attached_cpu(const GDBState *s)
+static CPUState *gdb_first_attached_cpu(void)
{
CPUState *cpu = first_cpu;
- GDBProcess *process = gdb_get_cpu_process(s, cpu);
+ GDBProcess *process = gdb_get_cpu_process(cpu);
if (!process->attached) {
- return gdb_next_attached_cpu(s, cpu);
+ return gdb_next_attached_cpu(cpu);
}
return cpu;
}
-static CPUState *gdb_get_cpu(const GDBState *s, uint32_t pid, uint32_t tid)
+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(s);
+ return gdb_first_attached_cpu();
} else if (pid && !tid) {
/* any thread in a specific process */
- process = gdb_get_process(s, pid);
+ process = gdb_get_process(pid);
if (process == NULL) {
return NULL;
return NULL;
}
- return get_first_cpu_in_process(s, process);
+ return get_first_cpu_in_process(process);
} else {
/* a specific thread */
cpu = find_cpu(tid);
return NULL;
}
- process = gdb_get_cpu_process(s, cpu);
+ process = gdb_get_cpu_process(cpu);
if (pid && process->pid != pid) {
return NULL;
}
}
-static const char *get_feature_xml(const GDBState *s, const char *p,
- const char **newp, GDBProcess *process)
+static const char *get_feature_xml(const char *p, const char **newp,
+ GDBProcess *process)
{
size_t len;
int i;
const char *name;
- CPUState *cpu = get_first_cpu_in_process(s, process);
+ CPUState *cpu = get_first_cpu_in_process(process);
CPUClass *cc = CPU_GET_CLASS(cpu);
len = 0;
return name ? xml_builtin[i][1] : NULL;
}
-static int gdb_read_register(CPUState *cpu, uint8_t *mem_buf, int reg)
+static int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
CPUArchState *env = cpu->env_ptr;
GDBRegisterState *r;
if (reg < cc->gdb_num_core_regs) {
- return cc->gdb_read_register(cpu, mem_buf, reg);
+ return cc->gdb_read_register(cpu, buf, reg);
}
for (r = cpu->gdb_regs; r; r = r->next) {
if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) {
- return r->get_reg(env, mem_buf, reg - r->base_reg);
+ return r->get_reg(env, buf, reg - r->base_reg);
}
}
return 0;
*/
void gdb_register_coprocessor(CPUState *cpu,
- gdb_reg_cb get_reg, gdb_reg_cb set_reg,
+ gdb_get_reg_cb get_reg, gdb_set_reg_cb set_reg,
int num_regs, const char *xml, int g_pos)
{
GDBRegisterState *s;
int err = 0;
if (kvm_enabled()) {
- return kvm_insert_breakpoint(gdbserver_state->c_cpu, addr, len, type);
+ return kvm_insert_breakpoint(gdbserver_state.c_cpu, addr, len, type);
}
switch (type) {
int err = 0;
if (kvm_enabled()) {
- return kvm_remove_breakpoint(gdbserver_state->c_cpu, addr, len, type);
+ return kvm_remove_breakpoint(gdbserver_state.c_cpu, addr, len, type);
}
switch (type) {
#endif
}
-static void gdb_process_breakpoint_remove_all(const GDBState *s, GDBProcess *p)
+static void gdb_process_breakpoint_remove_all(GDBProcess *p)
{
- CPUState *cpu = get_first_cpu_in_process(s, p);
+ CPUState *cpu = get_first_cpu_in_process(p);
while (cpu) {
gdb_cpu_breakpoint_remove_all(cpu);
- cpu = gdb_next_cpu_in_process(s, cpu);
+ cpu = gdb_next_cpu_in_process(cpu);
}
}
CPUState *cpu;
if (kvm_enabled()) {
- kvm_remove_all_breakpoints(gdbserver_state->c_cpu);
+ kvm_remove_all_breakpoints(gdbserver_state.c_cpu);
return;
}
}
}
-static void gdb_set_cpu_pc(GDBState *s, target_ulong pc)
+static void gdb_set_cpu_pc(target_ulong pc)
{
- CPUState *cpu = s->c_cpu;
+ CPUState *cpu = gdbserver_state.c_cpu;
cpu_synchronize_state(cpu);
cpu_set_pc(cpu, pc);
}
-static char *gdb_fmt_thread_id(const GDBState *s, CPUState *cpu,
- char *buf, size_t buf_size)
+static void gdb_append_thread_id(CPUState *cpu, GString *buf)
{
- if (s->multiprocess) {
- snprintf(buf, buf_size, "p%02x.%02x",
- gdb_get_cpu_pid(s, cpu), cpu_gdb_index(cpu));
+ if (gdbserver_state.multiprocess) {
+ g_string_append_printf(buf, "p%02x.%02x",
+ gdb_get_cpu_pid(cpu), cpu_gdb_index(cpu));
} else {
- snprintf(buf, buf_size, "%02x", cpu_gdb_index(cpu));
+ g_string_append_printf(buf, "%02x", cpu_gdb_index(cpu));
}
-
- return buf;
}
typedef enum GDBThreadIdKind {
return GDB_ONE_THREAD;
}
-static int is_query_packet(const char *p, const char *query, char separator)
-{
- unsigned int query_len = strlen(query);
-
- return strncmp(p, query, query_len) == 0 &&
- (p[query_len] == '\0' || p[query_len] == separator);
-}
-
/**
* 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(GDBState *s, const char *p)
+static int gdb_handle_vcont(const char *p)
{
int res, signal = 0;
char cur_action;
CPU_FOREACH(cpu) {
max_cpus = max_cpus <= cpu->cpu_index ? cpu->cpu_index + 1 : max_cpus;
}
+#else
+ MachineState *ms = MACHINE(qdev_get_machine());
+ unsigned int max_cpus = ms->smp.max_cpus;
#endif
/* uninitialised CPUs stay 0 */
newstates = g_new0(char, max_cpus);
goto out;
case GDB_ALL_PROCESSES:
- cpu = gdb_first_attached_cpu(s);
+ cpu = gdb_first_attached_cpu();
while (cpu) {
if (newstates[cpu->cpu_index] == 1) {
newstates[cpu->cpu_index] = cur_action;
}
- cpu = gdb_next_attached_cpu(s, cpu);
+ cpu = gdb_next_attached_cpu(cpu);
}
break;
case GDB_ALL_THREADS:
- process = gdb_get_process(s, pid);
+ process = gdb_get_process(pid);
if (!process->attached) {
res = -EINVAL;
goto out;
}
- cpu = get_first_cpu_in_process(s, process);
+ cpu = get_first_cpu_in_process(process);
while (cpu) {
if (newstates[cpu->cpu_index] == 1) {
newstates[cpu->cpu_index] = cur_action;
}
- cpu = gdb_next_cpu_in_process(s, cpu);
+ cpu = gdb_next_cpu_in_process(cpu);
}
break;
case GDB_ONE_THREAD:
- cpu = gdb_get_cpu(s, pid, tid);
+ cpu = gdb_get_cpu(pid, tid);
/* invalid CPU/thread specified */
if (!cpu) {
break;
}
}
- s->signal = signal;
- gdb_continue_partial(s, newstates);
+ gdbserver_state.signal = signal;
+ gdb_continue_partial(newstates);
out:
g_free(newstates);
}
typedef struct GdbCmdContext {
- GDBState *s;
GdbCmdVariant *params;
int num_params;
- uint8_t mem_buf[MAX_PACKET_LENGTH];
- char str_buf[MAX_PACKET_LENGTH + 1];
} GdbCmdContext;
typedef void (*GdbCmdHandler)(GdbCmdContext *gdb_ctx, void *user_ctx);
return !strncmp(string, pattern, strlen(pattern));
}
-static int process_string_cmd(GDBState *s, void *user_ctx, const char *data,
+static int process_string_cmd(void *user_ctx, const char *data,
const GdbCmdParseEntry *cmds, int num_cmds)
{
int i, schema_len, max_num_params = 0;
return -1;
}
- gdb_ctx.s = s;
cmd->handler(&gdb_ctx, user_ctx);
return 0;
}
return -1;
}
-static void run_cmd_parser(GDBState *s, const char *data,
- const GdbCmdParseEntry *cmd)
+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(s, NULL, data, cmd, 1)) {
- put_packet(s, "");
+ if (process_string_cmd(NULL, data, cmd, 1)) {
+ put_packet("");
}
}
static void handle_detach(GdbCmdContext *gdb_ctx, void *user_ctx)
{
GDBProcess *process;
- GDBState *s = gdb_ctx->s;
uint32_t pid = 1;
- if (s->multiprocess) {
+ if (gdbserver_state.multiprocess) {
if (!gdb_ctx->num_params) {
- put_packet(s, "E22");
+ put_packet("E22");
return;
}
pid = gdb_ctx->params[0].val_ul;
}
- process = gdb_get_process(s, pid);
- gdb_process_breakpoint_remove_all(s, process);
+ process = gdb_get_process(pid);
+ gdb_process_breakpoint_remove_all(process);
process->attached = false;
- if (pid == gdb_get_cpu_pid(s, s->c_cpu)) {
- s->c_cpu = gdb_first_attached_cpu(s);
+ if (pid == gdb_get_cpu_pid(gdbserver_state.c_cpu)) {
+ gdbserver_state.c_cpu = gdb_first_attached_cpu();
}
- if (pid == gdb_get_cpu_pid(s, s->g_cpu)) {
- s->g_cpu = gdb_first_attached_cpu(s);
+ if (pid == gdb_get_cpu_pid(gdbserver_state.g_cpu)) {
+ gdbserver_state.g_cpu = gdb_first_attached_cpu();
}
- if (!s->c_cpu) {
+ if (!gdbserver_state.c_cpu) {
/* No more process attached */
gdb_syscall_mode = GDB_SYS_DISABLED;
- gdb_continue(s);
+ gdb_continue();
}
- put_packet(s, "OK");
+ put_packet("OK");
}
static void handle_thread_alive(GdbCmdContext *gdb_ctx, void *user_ctx)
CPUState *cpu;
if (!gdb_ctx->num_params) {
- put_packet(gdb_ctx->s, "E22");
+ put_packet("E22");
return;
}
if (gdb_ctx->params[0].thread_id.kind == GDB_READ_THREAD_ERR) {
- put_packet(gdb_ctx->s, "E22");
+ put_packet("E22");
return;
}
- cpu = gdb_get_cpu(gdb_ctx->s, gdb_ctx->params[0].thread_id.pid,
+ cpu = gdb_get_cpu(gdb_ctx->params[0].thread_id.pid,
gdb_ctx->params[0].thread_id.tid);
if (!cpu) {
- put_packet(gdb_ctx->s, "E22");
+ put_packet("E22");
return;
}
- put_packet(gdb_ctx->s, "OK");
+ put_packet("OK");
}
static void handle_continue(GdbCmdContext *gdb_ctx, void *user_ctx)
{
if (gdb_ctx->num_params) {
- gdb_set_cpu_pc(gdb_ctx->s, gdb_ctx->params[0].val_ull);
+ gdb_set_cpu_pc(gdb_ctx->params[0].val_ull);
}
- gdb_ctx->s->signal = 0;
- gdb_continue(gdb_ctx->s);
+ gdbserver_state.signal = 0;
+ gdb_continue();
}
static void handle_cont_with_sig(GdbCmdContext *gdb_ctx, void *user_ctx)
signal = gdb_ctx->params[0].val_ul;
}
- gdb_ctx->s->signal = gdb_signal_to_target(signal);
- if (gdb_ctx->s->signal == -1) {
- gdb_ctx->s->signal = 0;
+ gdbserver_state.signal = gdb_signal_to_target(signal);
+ if (gdbserver_state.signal == -1) {
+ gdbserver_state.signal = 0;
}
- gdb_continue(gdb_ctx->s);
+ gdb_continue();
}
static void handle_set_thread(GdbCmdContext *gdb_ctx, void *user_ctx)
CPUState *cpu;
if (gdb_ctx->num_params != 2) {
- put_packet(gdb_ctx->s, "E22");
+ put_packet("E22");
return;
}
if (gdb_ctx->params[1].thread_id.kind == GDB_READ_THREAD_ERR) {
- put_packet(gdb_ctx->s, "E22");
+ put_packet("E22");
return;
}
if (gdb_ctx->params[1].thread_id.kind != GDB_ONE_THREAD) {
- put_packet(gdb_ctx->s, "OK");
+ put_packet("OK");
return;
}
- cpu = gdb_get_cpu(gdb_ctx->s, gdb_ctx->params[1].thread_id.pid,
+ cpu = gdb_get_cpu(gdb_ctx->params[1].thread_id.pid,
gdb_ctx->params[1].thread_id.tid);
if (!cpu) {
- put_packet(gdb_ctx->s, "E22");
+ put_packet("E22");
return;
}
*/
switch (gdb_ctx->params[0].opcode) {
case 'c':
- gdb_ctx->s->c_cpu = cpu;
- put_packet(gdb_ctx->s, "OK");
+ gdbserver_state.c_cpu = cpu;
+ put_packet("OK");
break;
case 'g':
- gdb_ctx->s->g_cpu = cpu;
- put_packet(gdb_ctx->s, "OK");
+ gdbserver_state.g_cpu = cpu;
+ put_packet("OK");
break;
default:
- put_packet(gdb_ctx->s, "E22");
+ put_packet("E22");
break;
}
}
int res;
if (gdb_ctx->num_params != 3) {
- put_packet(gdb_ctx->s, "E22");
+ put_packet("E22");
return;
}
gdb_ctx->params[1].val_ull,
gdb_ctx->params[2].val_ull);
if (res >= 0) {
- put_packet(gdb_ctx->s, "OK");
+ put_packet("OK");
return;
} else if (res == -ENOSYS) {
- put_packet(gdb_ctx->s, "");
+ put_packet("");
return;
}
- put_packet(gdb_ctx->s, "E22");
+ put_packet("E22");
}
static void handle_remove_bp(GdbCmdContext *gdb_ctx, void *user_ctx)
int res;
if (gdb_ctx->num_params != 3) {
- put_packet(gdb_ctx->s, "E22");
+ put_packet("E22");
return;
}
gdb_ctx->params[1].val_ull,
gdb_ctx->params[2].val_ull);
if (res >= 0) {
- put_packet(gdb_ctx->s, "OK");
+ put_packet("OK");
return;
} else if (res == -ENOSYS) {
- put_packet(gdb_ctx->s, "");
+ put_packet("");
return;
}
- put_packet(gdb_ctx->s, "E22");
+ 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(GdbCmdContext *gdb_ctx, void *user_ctx)
{
int reg_size;
if (!gdb_has_xml) {
- put_packet(gdb_ctx->s, "E00");
+ put_packet("");
return;
}
if (gdb_ctx->num_params != 2) {
- put_packet(gdb_ctx->s, "E22");
+ put_packet("E22");
return;
}
reg_size = strlen(gdb_ctx->params[1].data) / 2;
- hextomem(gdb_ctx->mem_buf, gdb_ctx->params[1].data, reg_size);
- gdb_write_register(gdb_ctx->s->g_cpu, gdb_ctx->mem_buf,
+ hextomem(gdbserver_state.mem_buf, gdb_ctx->params[1].data, reg_size);
+ gdb_write_register(gdbserver_state.g_cpu, gdbserver_state.mem_buf->data,
gdb_ctx->params[0].val_ull);
- put_packet(gdb_ctx->s, "OK");
+ put_packet("OK");
}
static void handle_get_reg(GdbCmdContext *gdb_ctx, void *user_ctx)
{
int reg_size;
- /*
- * Older gdb are really dumb, and don't use 'g' if 'p' is avaialable.
- * This works, but can be very slow. Anything new enough to
- * understand XML also knows how to use this properly.
- */
if (!gdb_has_xml) {
- put_packet(gdb_ctx->s, "");
+ put_packet("");
return;
}
if (!gdb_ctx->num_params) {
- put_packet(gdb_ctx->s, "E14");
+ put_packet("E14");
return;
}
- reg_size = gdb_read_register(gdb_ctx->s->g_cpu, gdb_ctx->mem_buf,
+ reg_size = gdb_read_register(gdbserver_state.g_cpu,
+ gdbserver_state.mem_buf,
gdb_ctx->params[0].val_ull);
if (!reg_size) {
- put_packet(gdb_ctx->s, "E14");
+ put_packet("E14");
+ return;
+ } else {
+ g_byte_array_set_size(gdbserver_state.mem_buf, reg_size);
+ }
+
+ memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data, reg_size);
+ put_strbuf();
+}
+
+static void handle_write_mem(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ if (gdb_ctx->num_params != 3) {
+ put_packet("E22");
+ return;
+ }
+
+ /* hextomem() reads 2*len bytes */
+ if (gdb_ctx->params[1].val_ull > strlen(gdb_ctx->params[2].data) / 2) {
+ put_packet("E22");
+ return;
+ }
+
+ hextomem(gdbserver_state.mem_buf, gdb_ctx->params[2].data,
+ gdb_ctx->params[1].val_ull);
+ if (target_memory_rw_debug(gdbserver_state.g_cpu, gdb_ctx->params[0].val_ull,
+ gdbserver_state.mem_buf->data,
+ gdbserver_state.mem_buf->len, true)) {
+ put_packet("E14");
+ return;
+ }
+
+ put_packet("OK");
+}
+
+static void handle_read_mem(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ if (gdb_ctx->num_params != 2) {
+ put_packet("E22");
+ return;
+ }
+
+ /* memtohex() doubles the required space */
+ if (gdb_ctx->params[1].val_ull > MAX_PACKET_LENGTH / 2) {
+ put_packet("E22");
+ return;
+ }
+
+ g_byte_array_set_size(gdbserver_state.mem_buf, gdb_ctx->params[1].val_ull);
+
+ if (target_memory_rw_debug(gdbserver_state.g_cpu, gdb_ctx->params[0].val_ull,
+ gdbserver_state.mem_buf->data,
+ gdbserver_state.mem_buf->len, false)) {
+ put_packet("E14");
+ return;
+ }
+
+ memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data,
+ gdbserver_state.mem_buf->len);
+ put_strbuf();
+}
+
+static void handle_write_all_regs(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ target_ulong addr, len;
+ uint8_t *registers;
+ int reg_size;
+
+ if (!gdb_ctx->num_params) {
+ return;
+ }
+
+ cpu_synchronize_state(gdbserver_state.g_cpu);
+ len = strlen(gdb_ctx->params[0].data) / 2;
+ hextomem(gdbserver_state.mem_buf, gdb_ctx->params[0].data, len);
+ registers = gdbserver_state.mem_buf->data;
+ for (addr = 0; addr < gdbserver_state.g_cpu->gdb_num_g_regs && len > 0;
+ addr++) {
+ reg_size = gdb_write_register(gdbserver_state.g_cpu, registers, addr);
+ len -= reg_size;
+ registers += reg_size;
+ }
+ put_packet("OK");
+}
+
+static void handle_read_all_regs(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ target_ulong addr, len;
+
+ cpu_synchronize_state(gdbserver_state.g_cpu);
+ g_byte_array_set_size(gdbserver_state.mem_buf, 0);
+ len = 0;
+ for (addr = 0; addr < gdbserver_state.g_cpu->gdb_num_g_regs; addr++) {
+ len += gdb_read_register(gdbserver_state.g_cpu,
+ gdbserver_state.mem_buf,
+ addr);
+ }
+ g_assert(len == gdbserver_state.mem_buf->len);
+
+ memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data, len);
+ put_strbuf();
+}
+
+static void handle_file_io(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ if (gdb_ctx->num_params >= 1 && gdbserver_state.current_syscall_cb) {
+ target_ulong ret, err;
+
+ ret = (target_ulong)gdb_ctx->params[0].val_ull;
+ if (gdb_ctx->num_params >= 2) {
+ err = (target_ulong)gdb_ctx->params[1].val_ull;
+ } else {
+ err = 0;
+ }
+ gdbserver_state.current_syscall_cb(gdbserver_state.c_cpu, ret, err);
+ gdbserver_state.current_syscall_cb = NULL;
+ }
+
+ if (gdb_ctx->num_params >= 3 && gdb_ctx->params[2].opcode == (uint8_t)'C') {
+ put_packet("T02");
+ return;
+ }
+
+ gdb_continue();
+}
+
+static void handle_step(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ if (gdb_ctx->num_params) {
+ gdb_set_cpu_pc((target_ulong)gdb_ctx->params[0].val_ull);
+ }
+
+ cpu_single_step(gdbserver_state.c_cpu, sstep_flags);
+ gdb_continue();
+}
+
+static void handle_v_cont_query(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ put_packet("vCont;c;C;s;S");
+}
+
+static void handle_v_cont(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ int res;
+
+ if (!gdb_ctx->num_params) {
return;
}
- memtohex(gdb_ctx->str_buf, gdb_ctx->mem_buf, reg_size);
- put_packet(gdb_ctx->s, gdb_ctx->str_buf);
+ res = gdb_handle_vcont(gdb_ctx->params[0].data);
+ if ((res == -EINVAL) || (res == -ERANGE)) {
+ put_packet("E22");
+ } else if (res) {
+ put_packet("");
+ }
+}
+
+static void handle_v_attach(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ GDBProcess *process;
+ CPUState *cpu;
+
+ g_string_assign(gdbserver_state.str_buf, "E22");
+ if (!gdb_ctx->num_params) {
+ goto cleanup;
+ }
+
+ process = gdb_get_process(gdb_ctx->params[0].val_ul);
+ if (!process) {
+ goto cleanup;
+ }
+
+ cpu = get_first_cpu_in_process(process);
+ if (!cpu) {
+ goto cleanup;
+ }
+
+ process->attached = true;
+ gdbserver_state.g_cpu = cpu;
+ gdbserver_state.c_cpu = cpu;
+
+ 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, ';');
+cleanup:
+ put_strbuf();
+}
+
+static void handle_v_kill(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ /* Kill the target */
+ put_packet("OK");
+ error_report("QEMU: Terminated via GDBstub");
+ exit(0);
+}
+
+static GdbCmdParseEntry gdb_v_commands_table[] = {
+ /* Order is important if has same prefix */
+ {
+ .handler = handle_v_cont_query,
+ .cmd = "Cont?",
+ .cmd_startswith = 1
+ },
+ {
+ .handler = handle_v_cont,
+ .cmd = "Cont",
+ .cmd_startswith = 1,
+ .schema = "s0"
+ },
+ {
+ .handler = handle_v_attach,
+ .cmd = "Attach;",
+ .cmd_startswith = 1,
+ .schema = "l0"
+ },
+ {
+ .handler = handle_v_kill,
+ .cmd = "Kill;",
+ .cmd_startswith = 1
+ },
+};
+
+static void handle_v_commands(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ if (!gdb_ctx->num_params) {
+ return;
+ }
+
+ if (process_string_cmd(NULL, gdb_ctx->params[0].data,
+ gdb_v_commands_table,
+ ARRAY_SIZE(gdb_v_commands_table))) {
+ put_packet("");
+ }
+}
+
+static void handle_query_qemu_sstepbits(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ g_string_printf(gdbserver_state.str_buf, "ENABLE=%x,NOIRQ=%x,NOTIMER=%x",
+ SSTEP_ENABLE, SSTEP_NOIRQ, SSTEP_NOTIMER);
+ put_strbuf();
+}
+
+static void handle_set_qemu_sstep(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ if (!gdb_ctx->num_params) {
+ return;
+ }
+
+ sstep_flags = gdb_ctx->params[0].val_ul;
+ put_packet("OK");
+}
+
+static void handle_query_qemu_sstep(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ g_string_printf(gdbserver_state.str_buf, "0x%x", sstep_flags);
+ put_strbuf();
+}
+
+static void handle_query_curr_tid(GdbCmdContext *gdb_ctx, 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 = get_first_cpu_in_process(process);
+ g_string_assign(gdbserver_state.str_buf, "QC");
+ gdb_append_thread_id(cpu, gdbserver_state.str_buf);
+ put_strbuf();
+}
+
+static void handle_query_threads(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ if (!gdbserver_state.query_cpu) {
+ put_packet("l");
+ return;
+ }
+
+ g_string_assign(gdbserver_state.str_buf, "m");
+ gdb_append_thread_id(gdbserver_state.query_cpu, gdbserver_state.str_buf);
+ put_strbuf();
+ gdbserver_state.query_cpu = gdb_next_attached_cpu(gdbserver_state.query_cpu);
+}
+
+static void handle_query_first_threads(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ gdbserver_state.query_cpu = gdb_first_attached_cpu();
+ handle_query_threads(gdb_ctx, user_ctx);
}
-static int gdb_handle_packet(GDBState *s, const char *line_buf)
+static void handle_query_thread_extra(GdbCmdContext *gdb_ctx, void *user_ctx)
{
+ g_autoptr(GString) rs = g_string_new(NULL);
CPUState *cpu;
+
+ if (!gdb_ctx->num_params ||
+ gdb_ctx->params[0].thread_id.kind == GDB_READ_THREAD_ERR) {
+ put_packet("E22");
+ return;
+ }
+
+ cpu = gdb_get_cpu(gdb_ctx->params[0].thread_id.pid,
+ gdb_ctx->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);
+ g_autofree 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);
+ memtohex(gdbserver_state.str_buf, (uint8_t *)rs->str, rs->len);
+ put_strbuf();
+}
+
+#ifdef CONFIG_USER_ONLY
+static void handle_query_offsets(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ TaskState *ts;
+
+ ts = gdbserver_state.c_cpu->opaque;
+ 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);
+ put_strbuf();
+}
+#else
+static void handle_query_rcmd(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ const guint8 zero = 0;
+ int len;
+
+ if (!gdb_ctx->num_params) {
+ put_packet("E22");
+ return;
+ }
+
+ len = strlen(gdb_ctx->params[0].data);
+ if (len % 2) {
+ put_packet("E01");
+ return;
+ }
+
+ g_assert(gdbserver_state.mem_buf->len == 0);
+ len = len / 2;
+ hextomem(gdbserver_state.mem_buf, gdb_ctx->params[0].data, len);
+ g_byte_array_append(gdbserver_state.mem_buf, &zero, 1);
+ qemu_chr_be_write(gdbserver_state.mon_chr, gdbserver_state.mem_buf->data,
+ gdbserver_state.mem_buf->len);
+ put_packet("OK");
+}
+#endif
+
+static void handle_query_supported(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ CPUClass *cc;
+
+ g_string_printf(gdbserver_state.str_buf, "PacketSize=%x", MAX_PACKET_LENGTH);
+ cc = CPU_GET_CLASS(first_cpu);
+ if (cc->gdb_core_xml_file) {
+ g_string_append(gdbserver_state.str_buf, ";qXfer:features:read+");
+ }
+
+ if (gdb_ctx->num_params &&
+ strstr(gdb_ctx->params[0].data, "multiprocess+")) {
+ gdbserver_state.multiprocess = true;
+ }
+
+ g_string_append(gdbserver_state.str_buf, ";vContSupported+;multiprocess+");
+ put_strbuf();
+}
+
+static void handle_query_xfer_features(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
GDBProcess *process;
CPUClass *cc;
+ unsigned long len, total_len, addr;
+ const char *xml;
const char *p;
- uint32_t pid, tid;
- int ch, reg_size, type, res;
- uint8_t mem_buf[MAX_PACKET_LENGTH];
- char buf[sizeof(mem_buf) + 1 /* trailing NUL */];
- char thread_id[16];
- uint8_t *registers;
- target_ulong addr, len;
+
+ if (gdb_ctx->num_params < 3) {
+ put_packet("E22");
+ return;
+ }
+
+ process = gdb_get_cpu_process(gdbserver_state.g_cpu);
+ cc = CPU_GET_CLASS(gdbserver_state.g_cpu);
+ if (!cc->gdb_core_xml_file) {
+ put_packet("");
+ return;
+ }
+
+ gdb_has_xml = true;
+ p = gdb_ctx->params[0].data;
+ xml = get_feature_xml(p, &p, process);
+ if (!xml) {
+ put_packet("E00");
+ return;
+ }
+
+ addr = gdb_ctx->params[1].val_ul;
+ len = gdb_ctx->params[2].val_ul;
+ total_len = strlen(xml);
+ if (addr > total_len) {
+ 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");
+ memtox(gdbserver_state.str_buf, xml + addr, len);
+ } else {
+ g_string_assign(gdbserver_state.str_buf, "l");
+ memtox(gdbserver_state.str_buf, xml + addr, total_len - addr);
+ }
+
+ put_packet_binary(gdbserver_state.str_buf->str,
+ gdbserver_state.str_buf->len, true);
+}
+
+static void handle_query_attached(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ put_packet(GDB_ATTACHED);
+}
+
+static void handle_query_qemu_supported(GdbCmdContext *gdb_ctx, 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
+ put_strbuf();
+}
+
+#ifndef CONFIG_USER_ONLY
+static void handle_query_qemu_phy_mem_mode(GdbCmdContext *gdb_ctx,
+ void *user_ctx)
+{
+ g_string_printf(gdbserver_state.str_buf, "%d", phy_memory_mode);
+ put_strbuf();
+}
+
+static void handle_set_qemu_phy_mem_mode(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ if (!gdb_ctx->num_params) {
+ put_packet("E22");
+ return;
+ }
+
+ if (!gdb_ctx->params[0].val_ul) {
+ phy_memory_mode = 0;
+ } else {
+ phy_memory_mode = 1;
+ }
+ put_packet("OK");
+}
+#endif
+
+static 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 = 1,
+ .schema = "l0"
+ },
+};
+
+static GdbCmdParseEntry gdb_gen_query_table[] = {
+ {
+ .handler = handle_query_curr_tid,
+ .cmd = "C",
+ },
+ {
+ .handler = handle_query_threads,
+ .cmd = "sThreadInfo",
+ },
+ {
+ .handler = handle_query_first_threads,
+ .cmd = "fThreadInfo",
+ },
+ {
+ .handler = handle_query_thread_extra,
+ .cmd = "ThreadExtraInfo,",
+ .cmd_startswith = 1,
+ .schema = "t0"
+ },
+#ifdef CONFIG_USER_ONLY
+ {
+ .handler = handle_query_offsets,
+ .cmd = "Offsets",
+ },
+#else
+ {
+ .handler = handle_query_rcmd,
+ .cmd = "Rcmd,",
+ .cmd_startswith = 1,
+ .schema = "s0"
+ },
+#endif
+ {
+ .handler = handle_query_supported,
+ .cmd = "Supported:",
+ .cmd_startswith = 1,
+ .schema = "s0"
+ },
+ {
+ .handler = handle_query_supported,
+ .cmd = "Supported",
+ .schema = "s0"
+ },
+ {
+ .handler = handle_query_xfer_features,
+ .cmd = "Xfer:features:read:",
+ .cmd_startswith = 1,
+ .schema = "s:l,l0"
+ },
+ {
+ .handler = handle_query_attached,
+ .cmd = "Attached:",
+ .cmd_startswith = 1
+ },
+ {
+ .handler = handle_query_attached,
+ .cmd = "Attached",
+ },
+ {
+ .handler = handle_query_qemu_supported,
+ .cmd = "qemu.Supported",
+ },
+#ifndef CONFIG_USER_ONLY
+ {
+ .handler = handle_query_qemu_phy_mem_mode,
+ .cmd = "qemu.PhyMemMode",
+ },
+#endif
+};
+
+static GdbCmdParseEntry gdb_gen_set_table[] = {
+ /* Order is important if has same prefix */
+ {
+ .handler = handle_set_qemu_sstep,
+ .cmd = "qemu.sstep:",
+ .cmd_startswith = 1,
+ .schema = "l0"
+ },
+#ifndef CONFIG_USER_ONLY
+ {
+ .handler = handle_set_qemu_phy_mem_mode,
+ .cmd = "qemu.PhyMemMode:",
+ .cmd_startswith = 1,
+ .schema = "l0"
+ },
+#endif
+};
+
+static void handle_gen_query(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ if (!gdb_ctx->num_params) {
+ return;
+ }
+
+ if (!process_string_cmd(NULL, gdb_ctx->params[0].data,
+ gdb_gen_query_set_common_table,
+ ARRAY_SIZE(gdb_gen_query_set_common_table))) {
+ return;
+ }
+
+ if (process_string_cmd(NULL, gdb_ctx->params[0].data,
+ gdb_gen_query_table,
+ ARRAY_SIZE(gdb_gen_query_table))) {
+ put_packet("");
+ }
+}
+
+static void handle_gen_set(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ if (!gdb_ctx->num_params) {
+ return;
+ }
+
+ if (!process_string_cmd(NULL, gdb_ctx->params[0].data,
+ gdb_gen_query_set_common_table,
+ ARRAY_SIZE(gdb_gen_query_set_common_table))) {
+ return;
+ }
+
+ if (process_string_cmd(NULL, gdb_ctx->params[0].data,
+ gdb_gen_set_table,
+ ARRAY_SIZE(gdb_gen_set_table))) {
+ put_packet("");
+ }
+}
+
+static void handle_target_halt(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+ 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, ';');
+ put_strbuf();
+ /*
+ * 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();
+}
+
+static int gdb_handle_packet(const char *line_buf)
+{
const GdbCmdParseEntry *cmd_parser = NULL;
trace_gdbstub_io_command(line_buf);
- p = line_buf;
- ch = *p++;
- switch(ch) {
+ switch (line_buf[0]) {
case '!':
- put_packet(s, "OK");
+ put_packet("OK");
break;
case '?':
- /* TODO: Make this return the correct value for user-mode. */
- snprintf(buf, sizeof(buf), "T%02xthread:%s;", GDB_SIGNAL_TRAP,
- gdb_fmt_thread_id(s, s->c_cpu, thread_id, sizeof(thread_id)));
- put_packet(s, buf);
- /* Remove all the breakpoints when this query is issued,
- * because gdb is doing and initial connect and the state
- * should be cleaned up.
- */
- gdb_breakpoint_remove_all();
+ {
+ static const GdbCmdParseEntry target_halted_cmd_desc = {
+ .handler = handle_target_halt,
+ .cmd = "?",
+ .cmd_startswith = 1
+ };
+ cmd_parser = &target_halted_cmd_desc;
+ }
break;
case 'c':
{
}
break;
case 'v':
- if (strncmp(p, "Cont", 4) == 0) {
- p += 4;
- if (*p == '?') {
- put_packet(s, "vCont;c;C;s;S");
- break;
- }
-
- res = gdb_handle_vcont(s, p);
-
- if (res) {
- if ((res == -EINVAL) || (res == -ERANGE)) {
- put_packet(s, "E22");
- break;
- }
- goto unknown_command;
- }
- break;
- } else if (strncmp(p, "Attach;", 7) == 0) {
- unsigned long pid;
-
- p += 7;
-
- if (qemu_strtoul(p, &p, 16, &pid)) {
- put_packet(s, "E22");
- break;
- }
-
- process = gdb_get_process(s, pid);
-
- if (process == NULL) {
- put_packet(s, "E22");
- break;
- }
-
- cpu = get_first_cpu_in_process(s, process);
-
- if (cpu == NULL) {
- /* Refuse to attach an empty process */
- put_packet(s, "E22");
- break;
- }
-
- process->attached = true;
-
- s->g_cpu = cpu;
- s->c_cpu = cpu;
-
- snprintf(buf, sizeof(buf), "T%02xthread:%s;", GDB_SIGNAL_TRAP,
- gdb_fmt_thread_id(s, cpu, thread_id, sizeof(thread_id)));
-
- put_packet(s, buf);
- break;
- } else if (strncmp(p, "Kill;", 5) == 0) {
- /* Kill the target */
- put_packet(s, "OK");
- error_report("QEMU: Terminated via GDBstub");
- exit(0);
- } else {
- goto unknown_command;
+ {
+ static const GdbCmdParseEntry v_cmd_desc = {
+ .handler = handle_v_commands,
+ .cmd = "v",
+ .cmd_startswith = 1,
+ .schema = "s0"
+ };
+ cmd_parser = &v_cmd_desc;
}
+ break;
case 'k':
/* Kill the target */
error_report("QEMU: Terminated via GDBstub");
}
break;
case 's':
- if (*p != '\0') {
- addr = strtoull(p, (char **)&p, 16);
- gdb_set_cpu_pc(s, addr);
+ {
+ static const GdbCmdParseEntry step_cmd_desc = {
+ .handler = handle_step,
+ .cmd = "s",
+ .cmd_startswith = 1,
+ .schema = "L0"
+ };
+ cmd_parser = &step_cmd_desc;
}
- cpu_single_step(s->c_cpu, sstep_flags);
- gdb_continue(s);
- return RS_IDLE;
+ break;
case 'F':
{
- target_ulong ret;
- target_ulong err;
-
- ret = strtoull(p, (char **)&p, 16);
- if (*p == ',') {
- p++;
- err = strtoull(p, (char **)&p, 16);
- } else {
- err = 0;
- }
- if (*p == ',')
- p++;
- type = *p;
- if (s->current_syscall_cb) {
- s->current_syscall_cb(s->c_cpu, ret, err);
- s->current_syscall_cb = NULL;
- }
- if (type == 'C') {
- put_packet(s, "T02");
- } else {
- gdb_continue(s);
- }
+ static const GdbCmdParseEntry file_io_cmd_desc = {
+ .handler = handle_file_io,
+ .cmd = "F",
+ .cmd_startswith = 1,
+ .schema = "L,L,o0"
+ };
+ cmd_parser = &file_io_cmd_desc;
}
break;
case 'g':
- cpu_synchronize_state(s->g_cpu);
- len = 0;
- for (addr = 0; addr < s->g_cpu->gdb_num_g_regs; addr++) {
- reg_size = gdb_read_register(s->g_cpu, mem_buf + len, addr);
- len += reg_size;
- }
- memtohex(buf, mem_buf, len);
- put_packet(s, buf);
+ {
+ static const GdbCmdParseEntry read_all_regs_cmd_desc = {
+ .handler = handle_read_all_regs,
+ .cmd = "g",
+ .cmd_startswith = 1
+ };
+ cmd_parser = &read_all_regs_cmd_desc;
+ }
break;
case 'G':
- cpu_synchronize_state(s->g_cpu);
- registers = mem_buf;
- len = strlen(p) / 2;
- hextomem((uint8_t *)registers, p, len);
- for (addr = 0; addr < s->g_cpu->gdb_num_g_regs && len > 0; addr++) {
- reg_size = gdb_write_register(s->g_cpu, registers, addr);
- len -= reg_size;
- registers += reg_size;
- }
- put_packet(s, "OK");
+ {
+ static const GdbCmdParseEntry write_all_regs_cmd_desc = {
+ .handler = handle_write_all_regs,
+ .cmd = "G",
+ .cmd_startswith = 1,
+ .schema = "s0"
+ };
+ cmd_parser = &write_all_regs_cmd_desc;
+ }
break;
case 'm':
- addr = strtoull(p, (char **)&p, 16);
- if (*p == ',')
- p++;
- len = strtoull(p, NULL, 16);
-
- /* memtohex() doubles the required space */
- if (len > MAX_PACKET_LENGTH / 2) {
- put_packet (s, "E22");
- break;
- }
-
- if (target_memory_rw_debug(s->g_cpu, addr, mem_buf, len, false) != 0) {
- put_packet (s, "E14");
- } else {
- memtohex(buf, mem_buf, len);
- put_packet(s, buf);
+ {
+ static const GdbCmdParseEntry read_mem_cmd_desc = {
+ .handler = handle_read_mem,
+ .cmd = "m",
+ .cmd_startswith = 1,
+ .schema = "L,L0"
+ };
+ cmd_parser = &read_mem_cmd_desc;
}
break;
case 'M':
- addr = strtoull(p, (char **)&p, 16);
- if (*p == ',')
- p++;
- len = strtoull(p, (char **)&p, 16);
- if (*p == ':')
- p++;
-
- /* hextomem() reads 2*len bytes */
- if (len > strlen(p) / 2) {
- put_packet (s, "E22");
- break;
- }
- hextomem(mem_buf, p, len);
- if (target_memory_rw_debug(s->g_cpu, addr, mem_buf, len,
- true) != 0) {
- put_packet(s, "E14");
- } else {
- put_packet(s, "OK");
+ {
+ static const GdbCmdParseEntry write_mem_cmd_desc = {
+ .handler = handle_write_mem,
+ .cmd = "M",
+ .cmd_startswith = 1,
+ .schema = "L,L:s0"
+ };
+ cmd_parser = &write_mem_cmd_desc;
}
break;
case 'p':
}
break;
case 'q':
- case 'Q':
- /* parse any 'q' packets here */
- if (!strcmp(p,"qemu.sstepbits")) {
- /* Query Breakpoint bit definitions */
- snprintf(buf, sizeof(buf), "ENABLE=%x,NOIRQ=%x,NOTIMER=%x",
- SSTEP_ENABLE,
- SSTEP_NOIRQ,
- SSTEP_NOTIMER);
- put_packet(s, buf);
- break;
- } else if (is_query_packet(p, "qemu.sstep", '=')) {
- /* Display or change the sstep_flags */
- p += 10;
- if (*p != '=') {
- /* Display current setting */
- snprintf(buf, sizeof(buf), "0x%x", sstep_flags);
- put_packet(s, buf);
- break;
- }
- p++;
- type = strtoul(p, (char **)&p, 16);
- sstep_flags = type;
- put_packet(s, "OK");
- break;
- } else if (strcmp(p,"C") == 0) {
- /*
- * "Current thread" remains vague in the spec, so always return
- * the first thread of the current process (gdb returns the
- * first thread).
- */
- cpu = get_first_cpu_in_process(s, gdb_get_cpu_process(s, s->g_cpu));
- snprintf(buf, sizeof(buf), "QC%s",
- gdb_fmt_thread_id(s, cpu, thread_id, sizeof(thread_id)));
- put_packet(s, buf);
- break;
- } else if (strcmp(p,"fThreadInfo") == 0) {
- s->query_cpu = gdb_first_attached_cpu(s);
- goto report_cpuinfo;
- } else if (strcmp(p,"sThreadInfo") == 0) {
- report_cpuinfo:
- if (s->query_cpu) {
- snprintf(buf, sizeof(buf), "m%s",
- gdb_fmt_thread_id(s, s->query_cpu,
- thread_id, sizeof(thread_id)));
- put_packet(s, buf);
- s->query_cpu = gdb_next_attached_cpu(s, s->query_cpu);
- } else
- put_packet(s, "l");
- break;
- } else if (strncmp(p,"ThreadExtraInfo,", 16) == 0) {
- if (read_thread_id(p + 16, &p, &pid, &tid) == GDB_READ_THREAD_ERR) {
- put_packet(s, "E22");
- break;
- }
- cpu = gdb_get_cpu(s, pid, tid);
- if (cpu != NULL) {
- cpu_synchronize_state(cpu);
-
- if (s->multiprocess && (s->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);
- char *cpu_name =
- object_get_canonical_path_component(OBJECT(cpu));
- len = snprintf((char *)mem_buf, sizeof(buf) / 2,
- "%s %s [%s]", cpu_model, cpu_name,
- cpu->halted ? "halted " : "running");
- g_free(cpu_name);
- } else {
- /* memtohex() doubles the required space */
- len = snprintf((char *)mem_buf, sizeof(buf) / 2,
- "CPU#%d [%s]", cpu->cpu_index,
- cpu->halted ? "halted " : "running");
- }
- trace_gdbstub_op_extra_info((char *)mem_buf);
- memtohex(buf, mem_buf, len);
- put_packet(s, buf);
- }
- break;
- }
-#ifdef CONFIG_USER_ONLY
- else if (strcmp(p, "Offsets") == 0) {
- TaskState *ts = s->c_cpu->opaque;
-
- snprintf(buf, sizeof(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);
- put_packet(s, buf);
- break;
- }
-#else /* !CONFIG_USER_ONLY */
- else if (strncmp(p, "Rcmd,", 5) == 0) {
- int len = strlen(p + 5);
-
- if ((len % 2) != 0) {
- put_packet(s, "E01");
- break;
- }
- len = len / 2;
- hextomem(mem_buf, p + 5, len);
- mem_buf[len++] = 0;
- qemu_chr_be_write(s->mon_chr, mem_buf, len);
- put_packet(s, "OK");
- break;
- }
-#endif /* !CONFIG_USER_ONLY */
- if (is_query_packet(p, "Supported", ':')) {
- snprintf(buf, sizeof(buf), "PacketSize=%x", MAX_PACKET_LENGTH);
- cc = CPU_GET_CLASS(first_cpu);
- if (cc->gdb_core_xml_file != NULL) {
- pstrcat(buf, sizeof(buf), ";qXfer:features:read+");
- }
-
- if (strstr(p, "multiprocess+")) {
- s->multiprocess = true;
- }
- pstrcat(buf, sizeof(buf), ";multiprocess+");
-
- put_packet(s, buf);
- break;
- }
- if (strncmp(p, "Xfer:features:read:", 19) == 0) {
- const char *xml;
- target_ulong total_len;
-
- process = gdb_get_cpu_process(s, s->g_cpu);
- cc = CPU_GET_CLASS(s->g_cpu);
- if (cc->gdb_core_xml_file == NULL) {
- goto unknown_command;
- }
-
- gdb_has_xml = true;
- p += 19;
- xml = get_feature_xml(s, p, &p, process);
- if (!xml) {
- snprintf(buf, sizeof(buf), "E00");
- put_packet(s, buf);
- break;
- }
-
- if (*p == ':')
- p++;
- addr = strtoul(p, (char **)&p, 16);
- if (*p == ',')
- p++;
- len = strtoul(p, (char **)&p, 16);
-
- total_len = strlen(xml);
- if (addr > total_len) {
- snprintf(buf, sizeof(buf), "E00");
- put_packet(s, buf);
- break;
- }
- if (len > (MAX_PACKET_LENGTH - 5) / 2)
- len = (MAX_PACKET_LENGTH - 5) / 2;
- if (len < total_len - addr) {
- buf[0] = 'm';
- len = memtox(buf + 1, xml + addr, len);
- } else {
- buf[0] = 'l';
- len = memtox(buf + 1, xml + addr, total_len - addr);
- }
- put_packet_binary(s, buf, len + 1, true);
- break;
+ {
+ static const GdbCmdParseEntry gen_query_cmd_desc = {
+ .handler = handle_gen_query,
+ .cmd = "q",
+ .cmd_startswith = 1,
+ .schema = "s0"
+ };
+ cmd_parser = &gen_query_cmd_desc;
}
- if (is_query_packet(p, "Attached", ':')) {
- put_packet(s, GDB_ATTACHED);
- break;
+ break;
+ case 'Q':
+ {
+ static const GdbCmdParseEntry gen_set_cmd_desc = {
+ .handler = handle_gen_set,
+ .cmd = "Q",
+ .cmd_startswith = 1,
+ .schema = "s0"
+ };
+ cmd_parser = &gen_set_cmd_desc;
}
- /* Unrecognised 'q' command. */
- goto unknown_command;
-
+ break;
default:
- unknown_command:
/* put empty packet */
- buf[0] = '\0';
- put_packet(s, buf);
+ put_packet("");
break;
}
- run_cmd_parser(s, line_buf, cmd_parser);
+ 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(gdbserver_state, cpu);
+ GDBProcess *p = gdb_get_cpu_process(cpu);
if (!p->attached) {
/*
return;
}
- gdbserver_state->c_cpu = cpu;
- gdbserver_state->g_cpu = cpu;
+ gdbserver_state.c_cpu = cpu;
+ gdbserver_state.g_cpu = cpu;
}
#ifndef CONFIG_USER_ONLY
static void gdb_vm_state_change(void *opaque, int running, RunState state)
{
- GDBState *s = gdbserver_state;
- CPUState *cpu = s->c_cpu;
- char buf[256];
- char thread_id[16];
+ 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 || s->state == RS_INACTIVE) {
+ if (running || gdbserver_state.state == RS_INACTIVE) {
return;
}
/* Is there a GDB syscall waiting to be sent? */
- if (s->current_syscall_cb) {
- put_packet(s, s->syscall_buf);
+ if (gdbserver_state.current_syscall_cb) {
+ put_packet(gdbserver_state.syscall_buf);
return;
}
return;
}
- gdb_fmt_thread_id(s, cpu, thread_id, sizeof(thread_id));
+ gdb_append_thread_id(cpu, tid);
switch (state) {
case RUN_STATE_DEBUG:
}
trace_gdbstub_hit_watchpoint(type, cpu_gdb_index(cpu),
(target_ulong)cpu->watchpoint_hit->vaddr);
- snprintf(buf, sizeof(buf),
- "T%02xthread:%s;%swatch:" TARGET_FMT_lx ";",
- GDB_SIGNAL_TRAP, thread_id, type,
- (target_ulong)cpu->watchpoint_hit->vaddr);
+ g_string_printf(buf, "T%02xthread:%s;%swatch:" TARGET_FMT_lx ";",
+ GDB_SIGNAL_TRAP, tid->str, type,
+ (target_ulong)cpu->watchpoint_hit->vaddr);
cpu->watchpoint_hit = NULL;
goto send_packet;
} else {
break;
}
gdb_set_stop_cpu(cpu);
- snprintf(buf, sizeof(buf), "T%02xthread:%s;", ret, thread_id);
+ g_string_printf(buf, "T%02xthread:%s;", ret, tid->str);
send_packet:
- put_packet(s, buf);
+ put_packet(buf->str);
/* disable single step if it was enabled */
cpu_single_step(cpu, 0);
char *p_end;
target_ulong addr;
uint64_t i64;
- GDBState *s;
- s = gdbserver_state;
- if (!s)
+ if (!gdbserver_state.init) {
return;
- s->current_syscall_cb = cb;
+ }
+
+ gdbserver_state.current_syscall_cb = cb;
#ifndef CONFIG_USER_ONLY
vm_stop(RUN_STATE_DEBUG);
#endif
- p = s->syscall_buf;
- p_end = &s->syscall_buf[sizeof(s->syscall_buf)];
+ p = &gdbserver_state.syscall_buf[0];
+ p_end = &gdbserver_state.syscall_buf[sizeof(gdbserver_state.syscall_buf)];
*(p++) = 'F';
while (*fmt) {
if (*fmt == '%') {
}
*p = 0;
#ifdef CONFIG_USER_ONLY
- put_packet(s, s->syscall_buf);
+ put_packet(gdbserver_state.syscall_buf);
/* Return control to gdb for it to process the syscall request.
* Since the protocol requires that gdb hands control back to us
* using a "here are the results" F packet, we don't need to check
* gdb_handlesig's return value (which is the signal to deliver if
* execution was resumed via a continue packet).
*/
- gdb_handlesig(s->c_cpu, 0);
+ gdb_handlesig(gdbserver_state.c_cpu, 0);
#else
/* In this case wait to send the syscall packet until notification that
the CPU has stopped. This must be done because if the packet is sent
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. */
- qemu_cpu_kick(s->c_cpu);
+ qemu_cpu_kick(gdbserver_state.c_cpu);
#endif
}
va_end(va);
}
-static void gdb_read_byte(GDBState *s, uint8_t ch)
+static void gdb_read_byte(uint8_t ch)
{
uint8_t reply;
#ifndef CONFIG_USER_ONLY
- if (s->last_packet_len) {
+ if (gdbserver_state.last_packet->len) {
/* Waiting for a response to the last packet. If we see the start
of a new command then abandon the previous response. */
if (ch == '-') {
trace_gdbstub_err_got_nack();
- put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len);
+ put_buffer(gdbserver_state.last_packet->data,
+ gdbserver_state.last_packet->len);
} else if (ch == '+') {
trace_gdbstub_io_got_ack();
} else {
trace_gdbstub_io_got_unexpected(ch);
}
- if (ch == '+' || ch == '$')
- s->last_packet_len = 0;
+ if (ch == '+' || ch == '$') {
+ g_byte_array_set_size(gdbserver_state.last_packet, 0);
+ }
if (ch != '$')
return;
}
} else
#endif
{
- switch(s->state) {
+ switch(gdbserver_state.state) {
case RS_IDLE:
if (ch == '$') {
/* start of command packet */
- s->line_buf_index = 0;
- s->line_sum = 0;
- s->state = RS_GETLINE;
+ gdbserver_state.line_buf_index = 0;
+ gdbserver_state.line_sum = 0;
+ gdbserver_state.state = RS_GETLINE;
} else {
trace_gdbstub_err_garbage(ch);
}
case RS_GETLINE:
if (ch == '}') {
/* start escape sequence */
- s->state = RS_GETLINE_ESC;
- s->line_sum += ch;
+ gdbserver_state.state = RS_GETLINE_ESC;
+ gdbserver_state.line_sum += ch;
} else if (ch == '*') {
/* start run length encoding sequence */
- s->state = RS_GETLINE_RLE;
- s->line_sum += ch;
+ gdbserver_state.state = RS_GETLINE_RLE;
+ gdbserver_state.line_sum += ch;
} else if (ch == '#') {
/* end of command, start of checksum*/
- s->state = RS_CHKSUM1;
- } else if (s->line_buf_index >= sizeof(s->line_buf) - 1) {
+ gdbserver_state.state = RS_CHKSUM1;
+ } else if (gdbserver_state.line_buf_index >= sizeof(gdbserver_state.line_buf) - 1) {
trace_gdbstub_err_overrun();
- s->state = RS_IDLE;
+ gdbserver_state.state = RS_IDLE;
} else {
/* unescaped command character */
- s->line_buf[s->line_buf_index++] = ch;
- s->line_sum += ch;
+ gdbserver_state.line_buf[gdbserver_state.line_buf_index++] = ch;
+ gdbserver_state.line_sum += ch;
}
break;
case RS_GETLINE_ESC:
if (ch == '#') {
/* unexpected end of command in escape sequence */
- s->state = RS_CHKSUM1;
- } else if (s->line_buf_index >= sizeof(s->line_buf) - 1) {
+ gdbserver_state.state = RS_CHKSUM1;
+ } else if (gdbserver_state.line_buf_index >= sizeof(gdbserver_state.line_buf) - 1) {
/* command buffer overrun */
trace_gdbstub_err_overrun();
- s->state = RS_IDLE;
+ gdbserver_state.state = RS_IDLE;
} else {
/* parse escaped character and leave escape state */
- s->line_buf[s->line_buf_index++] = ch ^ 0x20;
- s->line_sum += ch;
- s->state = RS_GETLINE;
+ gdbserver_state.line_buf[gdbserver_state.line_buf_index++] = ch ^ 0x20;
+ gdbserver_state.line_sum += ch;
+ gdbserver_state.state = RS_GETLINE;
}
break;
case RS_GETLINE_RLE:
if (ch < ' ' || ch == '#' || ch == '$' || ch > 126) {
/* invalid RLE count encoding */
trace_gdbstub_err_invalid_repeat(ch);
- s->state = RS_GETLINE;
+ gdbserver_state.state = RS_GETLINE;
} else {
/* decode repeat length */
int repeat = ch - ' ' + 3;
- if (s->line_buf_index + repeat >= sizeof(s->line_buf) - 1) {
+ 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();
- s->state = RS_IDLE;
- } else if (s->line_buf_index < 1) {
+ 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();
- s->state = RS_GETLINE;
+ gdbserver_state.state = RS_GETLINE;
} else {
/* repeat the last character */
- memset(s->line_buf + s->line_buf_index,
- s->line_buf[s->line_buf_index - 1], repeat);
- s->line_buf_index += repeat;
- s->line_sum += ch;
- s->state = RS_GETLINE;
+ 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;
/* get high hex digit of checksum */
if (!isxdigit(ch)) {
trace_gdbstub_err_checksum_invalid(ch);
- s->state = RS_GETLINE;
+ gdbserver_state.state = RS_GETLINE;
break;
}
- s->line_buf[s->line_buf_index] = '\0';
- s->line_csum = fromhex(ch) << 4;
- s->state = RS_CHKSUM2;
+ 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);
- s->state = RS_GETLINE;
+ gdbserver_state.state = RS_GETLINE;
break;
}
- s->line_csum |= fromhex(ch);
+ gdbserver_state.line_csum |= fromhex(ch);
- if (s->line_csum != (s->line_sum & 0xff)) {
- trace_gdbstub_err_checksum_incorrect(s->line_sum, s->line_csum);
+ 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 = '-';
- put_buffer(s, &reply, 1);
- s->state = RS_IDLE;
+ put_buffer(&reply, 1);
+ gdbserver_state.state = RS_IDLE;
} else {
/* send ACK reply */
reply = '+';
- put_buffer(s, &reply, 1);
- s->state = gdb_handle_packet(s, s->line_buf);
+ put_buffer(&reply, 1);
+ gdbserver_state.state = gdb_handle_packet(gdbserver_state.line_buf);
}
break;
default:
/* Tell the remote gdb that the process has exited. */
void gdb_exit(CPUArchState *env, int code)
{
- GDBState *s;
char buf[4];
- s = gdbserver_state;
- if (!s) {
+ if (!gdbserver_state.init) {
return;
}
#ifdef CONFIG_USER_ONLY
- if (gdbserver_fd < 0 || s->fd < 0) {
+ if (gdbserver_fd < 0 || gdbserver_state.fd < 0) {
return;
}
#endif
trace_gdbstub_op_exiting((uint8_t)code);
snprintf(buf, sizeof(buf), "W%02x", (uint8_t)code);
- put_packet(s, buf);
+ put_packet(buf);
#ifndef CONFIG_USER_ONLY
- qemu_chr_fe_deinit(&s->chr, true);
+ qemu_chr_fe_deinit(&gdbserver_state.chr, true);
#endif
}
GDBProcess *process;
int max_pid = 0;
- if (s->process_num) {
+ if (gdbserver_state.process_num) {
max_pid = s->processes[s->process_num - 1].pid;
}
int
gdb_handlesig(CPUState *cpu, int sig)
{
- GDBState *s;
char buf[256];
int n;
- s = gdbserver_state;
- if (gdbserver_fd < 0 || s->fd < 0) {
+ if (gdbserver_fd < 0 || gdbserver_state.fd < 0) {
return sig;
}
if (sig != 0) {
snprintf(buf, sizeof(buf), "S%02x", target_signal_to_gdb(sig));
- put_packet(s, buf);
+ put_packet(buf);
}
/* put_packet() might have detected that the peer terminated the
connection. */
- if (s->fd < 0) {
+ if (gdbserver_state.fd < 0) {
return sig;
}
sig = 0;
- s->state = RS_IDLE;
- s->running_state = 0;
- while (s->running_state == 0) {
- n = read(s->fd, buf, 256);
+ gdbserver_state.state = RS_IDLE;
+ gdbserver_state.running_state = 0;
+ while (gdbserver_state.running_state == 0) {
+ n = read(gdbserver_state.fd, buf, 256);
if (n > 0) {
int i;
for (i = 0; i < n; i++) {
- gdb_read_byte(s, buf[i]);
+ gdb_read_byte(buf[i]);
}
} else {
/* XXX: Connection closed. Should probably wait for another
connection before continuing. */
if (n == 0) {
- close(s->fd);
+ close(gdbserver_state.fd);
}
- s->fd = -1;
+ gdbserver_state.fd = -1;
return sig;
}
}
- sig = s->signal;
- s->signal = 0;
+ sig = gdbserver_state.signal;
+ gdbserver_state.signal = 0;
return sig;
}
/* Tell the remote gdb that the process has exited due to SIG. */
void gdb_signalled(CPUArchState *env, int sig)
{
- GDBState *s;
char buf[4];
- s = gdbserver_state;
- if (gdbserver_fd < 0 || s->fd < 0) {
+ if (gdbserver_fd < 0 || gdbserver_state.fd < 0) {
return;
}
snprintf(buf, sizeof(buf), "X%02x", target_signal_to_gdb(sig));
- put_packet(s, buf);
+ put_packet(buf);
}
static bool gdb_accept(void)
{
- GDBState *s;
struct sockaddr_in sockaddr;
socklen_t len;
int fd;
return false;
}
- s = g_malloc0(sizeof(GDBState));
- create_default_process(s);
- s->processes[0].attached = true;
- s->c_cpu = gdb_first_attached_cpu(s);
- s->g_cpu = s->c_cpu;
- s->fd = fd;
+ init_gdbserver_state();
+ create_default_process(&gdbserver_state);
+ gdbserver_state.processes[0].attached = true;
+ gdbserver_state.c_cpu = gdb_first_attached_cpu();
+ gdbserver_state.g_cpu = gdbserver_state.c_cpu;
+ gdbserver_state.fd = fd;
gdb_has_xml = false;
-
- gdbserver_state = s;
return true;
}
/* Disable gdb stub for child processes. */
void gdbserver_fork(CPUState *cpu)
{
- GDBState *s = gdbserver_state;
-
- if (gdbserver_fd < 0 || s->fd < 0) {
+ if (gdbserver_fd < 0 || gdbserver_state.fd < 0) {
return;
}
- close(s->fd);
- s->fd = -1;
+ close(gdbserver_state.fd);
+ gdbserver_state.fd = -1;
cpu_breakpoint_remove_all(cpu, BP_GDB);
cpu_watchpoint_remove_all(cpu, BP_GDB);
}
int i;
for (i = 0; i < size; i++) {
- gdb_read_byte(gdbserver_state, buf[i]);
+ gdb_read_byte(buf[i]);
}
}
-static void gdb_chr_event(void *opaque, int event)
+static void gdb_chr_event(void *opaque, QEMUChrEvent event)
{
int i;
GDBState *s = (GDBState *) opaque;
s->processes[i].attached = !i;
}
- s->c_cpu = gdb_first_attached_cpu(s);
+ s->c_cpu = gdb_first_attached_cpu();
s->g_cpu = s->c_cpu;
vm_stop(RUN_STATE_PAUSED);
}
}
-static void gdb_monitor_output(GDBState *s, const char *msg, int len)
-{
- char buf[MAX_PACKET_LENGTH];
-
- buf[0] = 'O';
- if (len > (MAX_PACKET_LENGTH/2) - 1)
- len = (MAX_PACKET_LENGTH/2) - 1;
- memtohex(buf + 1, (uint8_t *)msg, len);
- put_packet(s, buf);
-}
-
static int gdb_monitor_write(Chardev *chr, const uint8_t *buf, int len)
{
- const char *p = (const char *)buf;
- int max_sz;
-
- max_sz = (sizeof(gdbserver_state->last_packet) - 2) / 2;
- for (;;) {
- if (len <= max_sz) {
- gdb_monitor_output(gdbserver_state, p, len);
- break;
- }
- gdb_monitor_output(gdbserver_state, p, max_sz);
- p += max_sz;
- len -= max_sz;
- }
+ g_autoptr(GString) hex_buf = g_string_new("O");
+ memtohex(hex_buf, buf, len);
+ put_packet(hex_buf->str);
return len;
}
{
object_child_foreach(object_get_root(), find_cpu_clusters, s);
- if (s->processes) {
+ if (gdbserver_state.processes) {
/* Sort by PID */
- qsort(s->processes, s->process_num, sizeof(s->processes[0]), pid_order);
+ qsort(gdbserver_state.processes, gdbserver_state.process_num, sizeof(gdbserver_state.processes[0]), pid_order);
}
create_default_process(s);
}
-static void cleanup_processes(GDBState *s)
-{
- g_free(s->processes);
- s->process_num = 0;
- s->processes = NULL;
-}
-
int gdbserver_start(const char *device)
{
trace_gdbstub_op_start(device);
- GDBState *s;
char gdbstub_device_name[128];
Chardev *chr = NULL;
Chardev *mon_chr;
return -1;
}
- s = gdbserver_state;
- if (!s) {
- s = g_malloc0(sizeof(GDBState));
- gdbserver_state = s;
+ if (!gdbserver_state.init) {
+ 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(mon_chr, 0);
+ monitor_init_hmp(mon_chr, false, &error_abort);
} else {
- qemu_chr_fe_deinit(&s->chr, true);
- mon_chr = s->mon_chr;
- cleanup_processes(s);
- memset(s, 0, sizeof(GDBState));
- s->mon_chr = mon_chr;
+ qemu_chr_fe_deinit(&gdbserver_state.chr, true);
+ mon_chr = gdbserver_state.mon_chr;
+ reset_gdbserver_state();
}
- create_processes(s);
+ create_processes(&gdbserver_state);
if (chr) {
- qemu_chr_fe_init(&s->chr, chr, &error_abort);
- qemu_chr_fe_set_handlers(&s->chr, gdb_chr_can_receive, gdb_chr_receive,
- gdb_chr_event, NULL, s, NULL, true);
+ qemu_chr_fe_init(&gdbserver_state.chr, chr, &error_abort);
+ qemu_chr_fe_set_handlers(&gdbserver_state.chr, gdb_chr_can_receive,
+ gdb_chr_receive, gdb_chr_event,
+ NULL, &gdbserver_state, NULL, true);
}
- s->state = chr ? RS_IDLE : RS_INACTIVE;
- s->mon_chr = mon_chr;
- s->current_syscall_cb = NULL;
+ gdbserver_state.state = chr ? RS_IDLE : RS_INACTIVE;
+ gdbserver_state.mon_chr = mon_chr;
+ gdbserver_state.current_syscall_cb = NULL;
return 0;
}
void gdbserver_cleanup(void)
{
- if (gdbserver_state) {
- put_packet(gdbserver_state, "W00");
+ if (gdbserver_state.init) {
+ put_packet("W00");
}
}
projects / qemu.git / blobdiff