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remote.c
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remote.c
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/* Copyright (C) 1999-2001 Quality Quorum, Inc.
Copyright (C) 2002 Chris Liechti and Steve Underwood
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. The name of the author may not be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
QQI can be contacted as [email protected]
Implementation of `remote' and `extended-remote' targets. This
targets share most of the methods.
Exported Data:
remote_target - target descriptor of `remote' target
Imported Data:
None
Static Data:
remote_XXX - static data representing status and
parameters of remote target
Global Functions:
None
Static Functions:
remote_XXXX - methods comprising `remote' target,
descrition in file proxy.h
extended_remote_XXX - the only extended-remote specifi method
remote_connect_worker - local function implementing connect
method for both targets
remote_decode_XXXX - decode functions
remote_encode_XXXX - encode functions
remote_putpkt - send packet to remote
remote_getpkt - get packet from remote
$Id: remote.c 103 2008-01-17 04:21:36Z jiez $ */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /* HAVE_CONFIG_H */
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <inttypes.h>
#ifdef HAVE_GETOPT_LONG_ONLY
#ifndef HAVE_GETOPT_H
#error "configuration error: unexpected combination"
#endif /* HAVE_GETOPT_H */
#include <getopt.h>
#else
#include "getopt.h"
#endif /* HAVE_GETOPT_LONG_ONLY */
#include "gdbproxy.h"
#include "serial.h"
/* Note: we are using prefix 'remote' for static stuff in
order to simplify debugging of the target code itself */
#define RPREMOTE_VAL_TIMEOUT_DEFAULT (2)
#define RPREMOTE_VAL_BAUDRATE_DEFAULT (38400)
/*
* Target methods, static
*/
static void remote_help(const char *prog_name);
static void extended_remote_help(const char *prog_name);
static int remote_open(int agrc,
char * const argv[],
const char *prog_name,
log_func log_fn);
static void remote_close(void);
static int remote_connect(char *status_string, int status_string_size,
int *can_restart);
static int extended_remote_connect(char *status_string,
int status_string_size,
int *can_restart);
static int remote_disconnect(void);
static void remote_kill(void);
static int remote_restart(void);
static int extended_remote_restart(void);
static void remote_stop(void);
static int remote_set_gen_thread(rp_thread_ref *thread);
static int remote_set_ctrl_thread(rp_thread_ref *thread);
static int remote_is_thread_alive(rp_thread_ref *thread, int *alive);
static int remote_read_registers(unsigned char *data_buf,
unsigned char *avail_buf,
int buf_size,
int *read_size);
static int remote_write_registers(unsigned char *data_buf, int write_size);
static int remote_read_single_register(unsigned int reg_no,
unsigned char *data_buf,
unsigned char *avail_buf,
int buf_size,
int *read_size);
static int remote_write_single_register(unsigned int reg_no,
unsigned char *data_buf,
int write_size);
static int remote_read_mem(uint64_t addr, unsigned char *data_buf,
int req_size, int *actual_size);
static int remote_write_mem(uint64_t addr, unsigned char *data_buf,
int req_sise);
static int remote_resume_from_current(int step, int sig);
static int remote_resume_from_addr(int step, int sig,
uint64_t addr);
static int remote_go_waiting(int sig);
static int remote_wait_partial(int first, char *status_string,
int status_string_len, out_func out,
int *implemented, int *more);
static int remote_wait(char *status_string, int status_string_len,
out_func out, int *implemented);
static int remote_process_query(unsigned int *mask, rp_thread_ref *arg,
rp_thread_info *info);
static int remote_list_query(int first, rp_thread_ref *arg,
rp_thread_ref *result,
int max_num, int *num, int *done);
static int remote_current_thread_query(rp_thread_ref *thread);
static int remote_offsets_query(uint64_t *text,
uint64_t *data,
uint64_t *bss);
static int remote_crc_query(uint64_t addr,
int len,
uint32_t *val);
static int remote_raw_query(char *in_buf,
char *out_buf,
int out_buf_size);
static int remote_remcmd(char *in_buf, out_func of, data_func df);
static int remote_add_break(int type, uint64_t adddr, int len);
static int remote_remove_break(int type, uint64_t, int len);
/*
* Global target descriptor for target `remote'
*/
rp_target remote_target =
{
NULL, /* next */
"remote",
"proxy target implementing gdb serial protocol",
NULL,
remote_help,
remote_open,
remote_close,
remote_connect,
remote_disconnect,
remote_kill,
remote_restart,
remote_stop,
remote_set_gen_thread,
remote_set_ctrl_thread,
remote_is_thread_alive,
remote_read_registers,
remote_write_registers,
remote_read_single_register,
remote_write_single_register,
remote_read_mem,
remote_write_mem,
remote_resume_from_current,
remote_resume_from_addr,
remote_go_waiting,
remote_wait_partial,
remote_wait,
remote_process_query,
remote_list_query,
remote_current_thread_query,
remote_offsets_query,
remote_crc_query,
remote_raw_query,
remote_add_break,
remote_remove_break
};
/*
* Global target descriptor for target `extended-remote'
*/
rp_target extended_remote_target =
{
NULL, /* next */
"extended-remote",
"proxy target implementing extended gdb serial protocol",
NULL,
extended_remote_help,
remote_open,
remote_close,
extended_remote_connect,
remote_disconnect,
remote_kill,
extended_remote_restart,
remote_stop,
remote_set_gen_thread,
remote_set_ctrl_thread,
remote_is_thread_alive,
remote_read_registers,
remote_write_registers,
remote_read_single_register,
remote_write_single_register,
remote_read_mem,
remote_write_mem,
remote_resume_from_current,
remote_resume_from_addr,
remote_go_waiting,
remote_wait_partial,
remote_wait,
remote_process_query,
remote_list_query,
remote_current_thread_query,
remote_offsets_query,
remote_crc_query,
remote_raw_query,
remote_add_break,
remote_remove_break
};
/* Internal status */
static int remote_is_open = 0;
static int remote_connected = 0;
static int remote_extended_ops = 0;
/* Start up parameters, set by open */
static const char *remote_name = NULL;
static log_func remote_log = NULL;
static int remote_break = FALSE; /* Use ^C to break in */
static int remote_baud = RPREMOTE_VAL_BAUDRATE_DEFAULT;
static int remote_timeout = RPREMOTE_VAL_TIMEOUT_DEFAULT;
/* Buffers */
static char remote_out_buf[RP_PARAM_INOUTBUF_SIZE];
/* Local functions */
static int remote_connect_worker(int extended,
char *status_string,
int status_string_size,
int *can_restart);
static int remote_decode_data(const char *in,
unsigned char *out,
int out_size,
int *len);
static int remote_encode_data(const unsigned char *data,
int data_len,
char *out,
int out_size);
static int remote_decode_process_query_response(const char *in,
unsigned int *mask,
rp_thread_ref *ref,
rp_thread_info *info);
static int remote_decode_list_query_response(const char *in,
int max_num,
int *num, int *done,
rp_thread_ref *arg,
rp_thread_ref *result);
static int remote_decode_byte(const char *in, unsigned int *byte);
static int remote_decode_nibble(const char *in, unsigned int *nibble);
static int remote_decode_4bytes(const char *in, unsigned int *val);
static int remote_decode_8bytes(const char *in, uint64_t *val);
static void remote_encode_byte(unsigned int val, char *out);
static int remote_putpkt(const char *buf);
static int remote_getpkt(char *buf, int buf_len, int *len, int timeout);
/* Target method */
static void remote_help(const char *prog_name)
{
printf("This is proxy target `%s'. Usage:\n\n", remote_target.name);
printf(" %s [options] %s [%s-options] DEVICE\n",
prog_name,
remote_target.name,
remote_target.name);
printf("\nOptions:\n\n");
printf(" --copying print copying information\n");
printf(" --debug run proxy in debug mode\n");
printf(" --help `%s --help %s' prints this message\n",
prog_name,
remote_target.name);
printf(" --port=PORT use specified port\n");
printf(" --version print version\n");
printf(" --warranty print warranty information\n");
printf("\nRemote-options:\n\n");
printf(" --debug enables proxy target debugging.\n");
printf(" --use-break instructs to send BREAK to stop running\n");
printf(" target. Default is to send CTRL-C.\n");
printf(" --baud-rate=BAUD sets baud rate, default is %d.\n",
RPREMOTE_VAL_BAUDRATE_DEFAULT);
printf(" --timeout=TIMEOUT sets timeout in seconds, default is %d,\n",
RPREMOTE_VAL_TIMEOUT_DEFAULT);
printf(" min value is 1 max value is 3600\n");
printf("\nDevice:\n\n");
printf(" Device specifies serial device, e.g. `/dev/ttyS0'\n");
printf("\n");
return;
}
/* Target method */
static void extended_remote_help(const char *prog_name)
{
printf("This is proxy target `%s'. Usage:\n\n", extended_remote_target.name);
printf(" %s [options] %s [%s-options] DEVICE\n",
prog_name,
extended_remote_target.name,
extended_remote_target.name);
printf("\nOptions:\n\n");
printf(" --copying print copying information\n");
printf(" --debug run proxy in debug mode\n");
printf(" --help `%s --help %s' prints this message\n",
prog_name,
extended_remote_target.name);
printf(" --port=PORT use specified port\n");
printf(" --version print version\n");
printf(" --warranty print warranty information\n");
printf("\nRemote-options:\n\n");
printf(" --debug enables proxy target debugging.\n");
printf(" --use-break instructs to send BREAK to stop running\n");
printf(" target. Default is to send CTRL-C.\n");
printf(" --baud-rate=BAUD sets baud rate, default is %d.\n",
RPREMOTE_VAL_BAUDRATE_DEFAULT);
printf(" --timeout=TIMEOUT sets timeout in seconds, default is %d,\n",
RPREMOTE_VAL_TIMEOUT_DEFAULT);
printf(" min value is 1 max value is 3600\n");
printf("\nDevice:\n\n");
printf(" Device specifies serial device, e.g. `/dev/ttyS0'\n");
printf("\nNote:\n\n");
printf(" If the stub your communicating with does not support\n");
printf(" extended operations, use target `remote' instead\n");
printf("\n");
return;
}
/* Target method */
static int remote_open(int argc,
char * const argv[],
const char *prog_name,
log_func log_fn)
{
int ret;
/* Option descriptors */
static struct option long_options[] =
{
/* Options setting flag */
{"use-break", 0, &remote_break, 1},
/* Options with parameter */
{"baud-rate", 1, 0, 1},
{"timeout", 1, 0, 2},
{NULL, 0, 0, 0}
};
assert(argc > 0);
assert(prog_name != NULL);
assert(log_fn != NULL);
assert(!remote_is_open);
assert(!remote_connected);
/* Reset default values */
remote_extended_ops = FALSE;
remote_break = FALSE;
remote_baud = RPREMOTE_VAL_BAUDRATE_DEFAULT;
remote_timeout = RPREMOTE_VAL_TIMEOUT_DEFAULT;
/* Set name and log */
if (strcmp(argv[0], remote_target.name) == 0)
{
remote_name = remote_target.name;
}
else
{
assert(strcmp(argv[0], extended_remote_target.name) == 0);
remote_name = extended_remote_target.name;
}
remote_log = log_fn;
/* Process options */
for (;;)
{
int c;
int option_index;
c = getopt_long_only(argc, argv, "", long_options, &option_index);
if (c == EOF)
break;
switch (c)
{
case 0:
/* Long option which just sets a flag */
break;
case 1:
/* Baud rate */
remote_baud = atoi(optarg);
if (!serial_check_baud(remote_baud))
{
remote_log(RP_VAL_LOGLEVEL_ERR,
"%s: bad baud value %s",
remote_name,
optarg);
return RP_VAL_TARGETRET_ERR;
}
break;
case 2:
/* Timeout */
remote_timeout = atoi(optarg);
if (remote_timeout < 1 || remote_timeout > 3600)
{
remote_log(RP_VAL_LOGLEVEL_ERR,
"%s: bad timeout value %s",
remote_name,
optarg);
return RP_VAL_TARGETRET_ERR;
}
break;
default:
remote_log(RP_VAL_LOGLEVEL_NOTICE,
"%s: Use `%s --help %s' to see a complete list of options",
remote_name,
prog_name,
remote_name);
return RP_VAL_TARGETRET_ERR;
}
}
/* Convert remote timeout into milliseconds */
assert(remote_timeout >= 1 && remote_timeout <= 3600);
remote_timeout = remote_timeout * 1000;
if (argc != (optind + 1))
{
/* Bad number of arguments */
remote_log(RP_VAL_LOGLEVEL_ERR,
"%s: bad number of arguments",
remote_name);
remote_target.help(prog_name);
return RP_VAL_TARGETRET_ERR;
}
if (!(ret = serial_open(argv[optind], remote_baud)))
{
remote_log(RP_VAL_LOGLEVEL_ERR,
"%s: unable to opend device %s at %d baud",
remote_name,
argv[optind],
remote_baud);
return RP_VAL_TARGETRET_ERR;
}
remote_is_open = 1;
return RP_VAL_TARGETRET_OK;
}
/* Target method */
static void remote_close(void)
{
assert(remote_is_open);
if (remote_connected)
{
/* Disconnect and leave it running if connected */
remote_target.disconnect();
}
remote_is_open = 0;
remote_connected = 0;
serial_close();
}
/* Target method */
static int remote_connect(char *status_string,
int status_string_len,
int *can_restart)
{
return remote_connect_worker(FALSE,
status_string,
status_string_len,
can_restart);
}
/* Target method */
static int extended_remote_connect(char *status_string,
int status_string_len,
int *can_restart)
{
return remote_connect_worker(TRUE,
status_string,
status_string_len,
can_restart);
}
/* Target method */
static int remote_disconnect(void)
{
int ret;
char in_buf[RP_PARAM_INOUTBUF_SIZE];
int in_len;
assert(remote_is_open);
assert(remote_connected);
if (!(ret = remote_putpkt("D")))
return RP_VAL_TARGETRET_ERR;
/* If stub does not support the function, it
will reply, so we still have to try sucking in the
buffer */
ret = remote_getpkt(in_buf, sizeof(in_buf), &in_len, 500);
if (ret == 0 && in_len < 1)
{
/* It is not supported */
return RP_VAL_TARGETRET_NOSUPP;
}
/* Otherwise consider it disconnected */
remote_connected = FALSE;
remote_extended_ops = FALSE;
return RP_VAL_TARGETRET_OK;
}
/* Target method */
static void remote_kill(void)
{
char in_buf[RP_PARAM_INOUTBUF_SIZE];
int in_len;
assert(remote_is_open);
remote_putpkt("k");
/* It is quite likely there will be nothing back, so don't wait very long */
remote_getpkt(in_buf, sizeof(in_buf), &in_len, 100);
remote_connected = FALSE;
}
/* Target method */
static int remote_restart(void)
{
assert(remote_is_open);
assert(remote_connected);
assert(remote_extended_ops);
/* It should not happen */
assert(0);
return RP_VAL_TARGETRET_ERR;
}
/* Target method */
static int extended_remote_restart(void)
{
int ret;
assert(remote_is_open);
assert(remote_connected);
assert(remote_extended_ops);
/* We can use the 'R' command. It has to be
followed by a number for reasons unknown
It is quite possible we are restarting
a hung up system. For example, this could happen
after a kill. */
if (!(ret = remote_putpkt("R00")))
return RP_VAL_TARGETRET_ERR;
/* We do not expect a response here */
return RP_VAL_TARGETRET_OK;
}
/* Target method */
static void remote_stop(void)
{
assert(remote_is_open);
assert(remote_connected);
if (remote_break)
serial_sendbreak();
else
serial_putchar(0x03);
}
static int remote_set_gen_thread(rp_thread_ref *thread)
{
int ret;
char buf[40];
char in_buf[RP_PARAM_INOUTBUF_SIZE];
int in_len;
assert(thread != NULL);
sprintf(buf, "Hg%"PRIu64"x", thread->val);
if (!(ret = remote_putpkt(buf)))
return RP_VAL_TARGETRET_ERR;
if ((ret = remote_getpkt(in_buf, sizeof(in_buf), &in_len, -1)) != 0)
return RP_VAL_TARGETRET_ERR;
if (in_len < 1)
return RP_VAL_TARGETRET_NOSUPP;
if (in_buf[0] != 'O' || in_buf[1] != 'K')
return RP_VAL_TARGETRET_ERR;
return RP_VAL_TARGETRET_OK;
}
/* Target method */
static int remote_set_ctrl_thread(rp_thread_ref *thread)
{
char in_buf[RP_PARAM_INOUTBUF_SIZE];
int in_len;
int ret;
char buf[40];
sprintf(buf, "Hc%"PRIu64"x", thread->val);
if (!(ret = remote_putpkt(buf)))
return RP_VAL_TARGETRET_ERR;
if ((ret = remote_getpkt(in_buf, sizeof(in_buf), &in_len, -1)) != 0)
return RP_VAL_TARGETRET_ERR;
if (in_len < 1)
return RP_VAL_TARGETRET_NOSUPP;
if (in_buf[0] != 'O' || in_buf[1] != 'K')
return RP_VAL_TARGETRET_ERR;
return RP_VAL_TARGETRET_OK;
}
/* Target method */
static int remote_is_thread_alive(rp_thread_ref *thread, int *alive)
{
char in_buf[RP_PARAM_INOUTBUF_SIZE];
int in_len;
int ret;
char buf[40];
assert(thread != NULL);
assert(alive != NULL);
sprintf(buf, "T%"PRIu64"x", thread->val);
if (!(ret = remote_putpkt(buf)))
return RP_VAL_TARGETRET_ERR;
/* This one is unusual 'ENN' means - not alive */
if ((ret = remote_getpkt(in_buf, sizeof(in_buf), &in_len, -1)) != 0)
return RP_VAL_TARGETRET_ERR;
if (in_len < 1)
return RP_VAL_TARGETRET_NOSUPP;
if ((in_buf[0] != 'O' || in_buf[1] != 'K')
&&
in_buf[0] != 'E')
{
return RP_VAL_TARGETRET_ERR;
}
if (in_buf[0] == 'O' && in_buf[1] == 'K')
*alive = TRUE;
else
*alive = FALSE;
return RP_VAL_TARGETRET_OK;
}
/* Target method */
static int remote_read_registers(unsigned char *data_buf,
unsigned char *avail_buf,
int buf_size,
int *read_size)
{
char in_buf[RP_PARAM_INOUTBUF_SIZE];
int in_len;
int ret;
int count;
char *in;
unsigned int val;
assert(data_buf != NULL);
assert(avail_buf != NULL);
assert(buf_size > 0);
assert(read_size != NULL);
if ((ret = remote_putpkt("g")))
return RP_VAL_TARGETRET_ERR;
for (;;)
{
if ((ret = remote_getpkt(in_buf, sizeof(in_buf), &in_len, -1)) != 0)
return RP_VAL_TARGETRET_ERR;
if (in_len < 1)
return RP_VAL_TARGETRET_NOSUPP;
if (rp_hex_nibble(in_buf[0]) >= 0 || in_buf[0] != 'x')
break;
}
for (count = 0, in = in_buf;
*in != 0 && count < buf_size;
count++, in += 2, data_buf++, avail_buf++)
{
if (*(in + 1) == '\0')
{
/* Odd number of nibbles, discard the last one */
remote_log(RP_VAL_LOGLEVEL_WARNING,
"%s: odd number of nibbles",
remote_name);
if (count == 0)
return RP_VAL_TARGETRET_ERR;
*read_size = count;
return RP_VAL_TARGETRET_OK;
}
if (*in == 'x' && *(in + 1) == 'x')
{
*avail_buf = 0;
*data_buf = 0;
}
else if (*in == 'x' || *(in + 1) == 'x')
{
/* Unavailable nibble ???? */
return RP_VAL_TARGETRET_ERR;
}
else
{
if (!remote_decode_byte(in, &val))
return RP_VAL_TARGETRET_ERR;
*avail_buf = 1;
*data_buf = val & 0xff;
}
}
if (*in != '\0')
{
/* Input too long */
return RP_VAL_TARGETRET_ERR;
}
*read_size = count;
return RP_VAL_TARGETRET_OK;
}
/* Target method */
static int remote_write_registers(unsigned char *buf, int write_size)
{
char in_buf[RP_PARAM_INOUTBUF_SIZE];
int in_len;
int ret;
assert(buf != NULL);
assert(write_size > 0);
remote_out_buf[0] = 'G';
ret = remote_encode_data(buf,
write_size,
&remote_out_buf[1],
sizeof(remote_out_buf) - 1);
if (!ret)
{
assert(0);
return RP_VAL_TARGETRET_ERR;
}
if (!(ret = remote_putpkt(remote_out_buf)))
return RP_VAL_TARGETRET_ERR;
if ((ret = remote_getpkt(in_buf, sizeof(in_buf), &in_len, -1)) != 0)
return RP_VAL_TARGETRET_ERR;
if (in_len < 1)
return RP_VAL_TARGETRET_NOSUPP;
if (in_buf[0] != 'O' || in_buf[1] != 'K')
return RP_VAL_TARGETRET_ERR;
return RP_VAL_TARGETRET_OK;
}
/* Target method */
static int remote_read_single_register(unsigned int reg_no,
unsigned char *data_buf,
unsigned char *avail_buf,
int buf_size,
int *read_size)
{
char in_buf[RP_PARAM_INOUTBUF_SIZE];
int in_len;
int ret;
int count;
char *in;
unsigned int val;
assert(data_buf != NULL);
assert(avail_buf != NULL);
assert(buf_size > 0);
assert(read_size != NULL);
sprintf(remote_out_buf, "p%x", reg_no);
if (!(ret = remote_putpkt(remote_out_buf)))
return RP_VAL_TARGETRET_ERR;
for (;;)
{
if ((ret = remote_getpkt(in_buf, sizeof(in_buf), &in_len, -1)) != 0)
return RP_VAL_TARGETRET_ERR;
if (in_len < 1)
return RP_VAL_TARGETRET_NOSUPP;
if (rp_hex_nibble(in_buf[0]) >= 0 || in_buf[0] != 'x')
break;
}
for (count = 0, in = in_buf;
*in != 0 && count < buf_size;
count++, in += 2, data_buf++, avail_buf++)
{
if (*(in + 1) == 0)
{
/* Odd number of nibbles, discard the last one */
remote_log(RP_VAL_LOGLEVEL_WARNING,
"%s: odd number of nibbles",
remote_name);
if (count == 0)
return RP_VAL_TARGETRET_ERR;
*read_size = count;
return RP_VAL_TARGETRET_OK;
}
if (*in == 'x' && *(in + 1) == 'x')
{
*avail_buf = 0;
*data_buf = 0;
}
else if (*in == 'x' || *(in + 1) == 'x')
{
/* Unavailable nibble ???? */
return RP_VAL_TARGETRET_ERR;
}
else
{
if (!remote_decode_byte(in, &val))
return RP_VAL_TARGETRET_ERR;
*avail_buf = 1;
*data_buf = val & 0xff;
}
}
if (*in)
{
/* Input too long */
return RP_VAL_TARGETRET_ERR;
}
*read_size = count;
return RP_VAL_TARGETRET_OK;
}
/* Target method */
static int remote_write_single_register(unsigned int reg_no,
unsigned char *buf,
int write_size)
{
char in_buf[RP_PARAM_INOUTBUF_SIZE];
int in_len;
int ret;
int len;
assert(buf != NULL);
assert(write_size > 0);
len = sprintf(remote_out_buf, "P%x=", reg_no);
ret = remote_encode_data(buf,
write_size,
&remote_out_buf[len],
sizeof(remote_out_buf) - len);
if (!ret)
{
assert(0);
return RP_VAL_TARGETRET_ERR;
}
if (!(ret = remote_putpkt(remote_out_buf)))
return RP_VAL_TARGETRET_ERR;
if ((ret = remote_getpkt(in_buf, sizeof(in_buf), &in_len, -1)) != 0)
return RP_VAL_TARGETRET_ERR;
if (in_len < 1)
return RP_VAL_TARGETRET_NOSUPP;
if (in_buf[0] != 'O' || in_buf[1] != 'K')
return RP_VAL_TARGETRET_ERR;
return RP_VAL_TARGETRET_OK;
}
/* Target method */
static int remote_read_mem (uint64_t addr,
unsigned char *buf,
int req_size,
int *actual_size)
{
char in_buf[RP_PARAM_INOUTBUF_SIZE];
int in_len;
int ret;
assert(buf != NULL);
assert(actual_size != NULL);
sprintf(remote_out_buf,"m%"PRIu64"x,%x", addr, req_size);
if (!(ret = remote_putpkt(remote_out_buf)))
return RP_VAL_TARGETRET_ERR;
if ((ret = remote_getpkt(in_buf, sizeof(in_buf), &in_len, -1)) != 0)
return RP_VAL_TARGETRET_ERR;
if (in_len < 1)
return (req_size == 0) ? RP_VAL_TARGETRET_OK : RP_VAL_TARGETRET_NOSUPP;
if (!(ret = remote_decode_data(in_buf, buf, req_size, actual_size)))
return RP_VAL_TARGETRET_ERR;
return RP_VAL_TARGETRET_OK;
}
/* Target method */
static int remote_write_mem(uint64_t addr,
unsigned char *buf,
int write_size)
{
char in_buf[RP_PARAM_INOUTBUF_SIZE];
int in_len;
int ret;
int off;
assert(buf != NULL);
off = sprintf(remote_out_buf, "M%"PRIu64"x,%x:", addr, write_size);
if (write_size > 0)
{
ret = remote_encode_data(buf,
write_size,
&remote_out_buf[off],
sizeof(remote_out_buf) - off);
if (!ret)
{
assert(0);
return RP_VAL_TARGETRET_ERR;
}
}
if (!(ret = remote_putpkt(remote_out_buf)))
return RP_VAL_TARGETRET_ERR;