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gdbstub: Implement v commands with new infra

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Signed-off-by: Jon Doron <arilou@gmail.com>
Message-Id: <20190529064148.19856-17-arilou@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
This commit is contained in:
Jon Doron 2019-05-29 09:41:44 +03:00 committed by Alex Bennée
parent 933f80dd42
commit 8536ec02fe
1 changed files with 110 additions and 60 deletions
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170
gdbstub.c
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@ -1822,6 +1822,106 @@ static void handle_step(GdbCmdContext *gdb_ctx, void *user_ctx)
gdb_continue(gdb_ctx->s);
}
static void handle_v_cont_query(GdbCmdContext *gdb_ctx, void *user_ctx)
{
put_packet(gdb_ctx->s, "vCont;c;C;s;S");
}
static void handle_v_cont(GdbCmdContext *gdb_ctx, void *user_ctx)
{
int res;
if (!gdb_ctx->num_params) {
return;
}
res = gdb_handle_vcont(gdb_ctx->s, gdb_ctx->params[0].data);
if ((res == -EINVAL) || (res == -ERANGE)) {
put_packet(gdb_ctx->s, "E22");
} else if (res) {
put_packet(gdb_ctx->s, "");
}
}
static void handle_v_attach(GdbCmdContext *gdb_ctx, void *user_ctx)
{
GDBProcess *process;
CPUState *cpu;
char thread_id[16];
pstrcpy(gdb_ctx->str_buf, sizeof(gdb_ctx->str_buf), "E22");
if (!gdb_ctx->num_params) {
goto cleanup;
}
process = gdb_get_process(gdb_ctx->s, gdb_ctx->params[0].val_ul);
if (!process) {
goto cleanup;
}
cpu = get_first_cpu_in_process(gdb_ctx->s, process);
if (!cpu) {
goto cleanup;
}
process->attached = true;
gdb_ctx->s->g_cpu = cpu;
gdb_ctx->s->c_cpu = cpu;
gdb_fmt_thread_id(gdb_ctx->s, cpu, thread_id, sizeof(thread_id));
snprintf(gdb_ctx->str_buf, sizeof(gdb_ctx->str_buf), "T%02xthread:%s;",
GDB_SIGNAL_TRAP, thread_id);
cleanup:
put_packet(gdb_ctx->s, gdb_ctx->str_buf);
}
static void handle_v_kill(GdbCmdContext *gdb_ctx, void *user_ctx)
{
/* Kill the target */
put_packet(gdb_ctx->s, "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(gdb_ctx->s, NULL, gdb_ctx->params[0].data,
gdb_v_commands_table,
ARRAY_SIZE(gdb_v_commands_table))) {
put_packet(gdb_ctx->s, "");
}
}
static int gdb_handle_packet(GDBState *s, const char *line_buf)
{
CPUState *cpu;
@ -1829,7 +1929,7 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
CPUClass *cc;
const char *p;
uint32_t pid, tid;
int ch, type, res;
int ch, type;
uint8_t mem_buf[MAX_PACKET_LENGTH];
char buf[sizeof(mem_buf) + 1 /* trailing NUL */];
char thread_id[16];
@ -1878,66 +1978,16 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
}
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");