* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
- * Copyright (C) 2007,2008 Øyvind Harboe *
+ * Copyright (C) 2007-2009 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* Copyright (C) 2008 by Spencer Oliver *
#include "config.h"
#endif
-#include "breakpoints.h"
-#include "target_request.h"
-#include "register.h"
+#include <target/breakpoints.h>
+#include <target/target_request.h>
+#include <target/register.h>
#include "server.h"
-#include "flash.h"
+#include <flash/nor/core.h>
#include "gdb_server.h"
-#include "image.h"
-#include "jtag.h"
+#include <target/image.h>
+#include <jtag/jtag.h>
+
+
+/* private connection data for GDB */
+struct gdb_connection
+{
+ char buffer[GDB_BUFFER_SIZE];
+ char *buf_p;
+ int buf_cnt;
+ int ctrl_c;
+ enum target_state frontend_state;
+ struct image *vflash_image;
+ int closed;
+ int busy;
+ int noack_mode;
+ bool sync; /* set flag to true if you want the next stepi to return immediately.
+ allowing GDB to pick up a fresh set of register values from the target
+ without modifying the target state. */
+
+};
#if 0
extern int gdb_error(struct connection *connection, int retval);
static unsigned short gdb_port = 3333;
+static unsigned short gdb_port_next = 0;
static const char *DIGITS = "0123456789abcdef";
static void gdb_log_callback(void *priv, const char *file, unsigned line,
return ERROR_OK;
}
-int gdb_get_char(struct connection *connection, int* next_char)
+static int gdb_get_char_inner(struct connection *connection, int* next_char)
{
struct gdb_connection *gdb_con = connection->priv;
int retval = ERROR_OK;
-#ifdef _DEBUG_GDB_IO_
- char *debug_buffer;
-#endif
-
- if (gdb_con->buf_cnt-- > 0)
- {
- *next_char = *(gdb_con->buf_p++);
- if (gdb_con->buf_cnt > 0)
- connection->input_pending = 1;
- else
- connection->input_pending = 0;
-
-#ifdef _DEBUG_GDB_IO_
- LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
-#endif
-
- return ERROR_OK;
- }
-
for (;;)
{
if (connection->service->type == CONNECTION_PIPE)
return retval;
}
+/**
+ * The cool thing about this fn is that it allows buf_p and buf_cnt to be
+ * held in registers in the inner loop.
+ *
+ * For small caches and embedded systems this is important!
+ */
+static inline int gdb_get_char_fast(struct connection *connection, int* next_char, char **buf_p, int *buf_cnt)
+{
+ int retval = ERROR_OK;
+
+ if ((*buf_cnt)-- > 0)
+ {
+ *next_char = **buf_p;
+ (*buf_p)++;
+ if (*buf_cnt > 0)
+ connection->input_pending = 1;
+ else
+ connection->input_pending = 0;
+
+#ifdef _DEBUG_GDB_IO_
+ LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
+#endif
+
+ return ERROR_OK;
+ }
+
+ struct gdb_connection *gdb_con = connection->priv;
+ gdb_con->buf_p = *buf_p;
+ gdb_con->buf_cnt = *buf_cnt;
+ retval = gdb_get_char_inner(connection, next_char);
+ *buf_p = gdb_con->buf_p;
+ *buf_cnt = gdb_con->buf_cnt;
+
+ return retval;
+}
+
+
+int gdb_get_char(struct connection *connection, int* next_char)
+{
+ struct gdb_connection *gdb_con = connection->priv;
+ return gdb_get_char_fast(connection, next_char, &gdb_con->buf_p, &gdb_con->buf_cnt);
+}
+
+
int gdb_putback_char(struct connection *connection, int last_char)
{
struct gdb_connection *gdb_con = connection->priv;
unsigned char my_checksum = 0;
char checksum[3];
int character;
- int retval;
+ int retval = ERROR_OK;
struct gdb_connection *gdb_con = connection->priv;
my_checksum = 0;
int count = 0;
count = 0;
+
+ /* move this over into local variables to use registers and give the
+ * more freedom to optimize */
+ char *buf_p = gdb_con->buf_p;
+ int buf_cnt = gdb_con->buf_cnt;
+
for (;;)
{
/* The common case is that we have an entire packet with no escape chars.
* We need to leave at least 2 bytes in the buffer to have
* gdb_get_char() update various bits and bobs correctly.
*/
- if ((gdb_con->buf_cnt > 2) && ((gdb_con->buf_cnt + count) < *len))
+ if ((buf_cnt > 2) && ((buf_cnt + count) < *len))
{
/* The compiler will struggle a bit with constant propagation and
* aliasing, so we help it by showing that these values do not
* change inside the loop
*/
int i;
- char *buf = gdb_con->buf_p;
- int run = gdb_con->buf_cnt - 2;
+ char *buf = buf_p;
+ int run = buf_cnt - 2;
i = 0;
int done = 0;
while (i < run)
buffer[count++] = character & 0xff;
}
}
- gdb_con->buf_p += i;
- gdb_con->buf_cnt -= i;
+ buf_p += i;
+ buf_cnt -= i;
if (done)
break;
}
if (count > *len)
{
LOG_ERROR("packet buffer too small");
- return ERROR_GDB_BUFFER_TOO_SMALL;
+ retval = ERROR_GDB_BUFFER_TOO_SMALL;
+ break;
}
- if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
- return retval;
+ retval = gdb_get_char_fast(connection, &character, &buf_p, &buf_cnt);
+ if (retval != ERROR_OK)
+ break;
if (character == '#')
break;
/* data transmitted in binary mode (X packet)
* uses 0x7d as escape character */
my_checksum += character & 0xff;
- if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
- return retval;
+
+ retval = gdb_get_char_fast(connection, &character, &buf_p, &buf_cnt);
+ if (retval != ERROR_OK)
+ break;
+
my_checksum += character & 0xff;
buffer[count++] = (character ^ 0x20) & 0xff;
}
}
}
+ gdb_con->buf_p = buf_p;
+ gdb_con->buf_cnt = buf_cnt;
+
+ if (retval != ERROR_OK)
+ return retval;
+
*len = count;
if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
}
}
-static int hextoint(char c)
+static int hextoint(int c)
{
if (c>='0'&&c<='9')
{
return ERROR_OK;
}
-int gdb_init(void)
+static int gdb_target_start(struct target *target, uint16_t port)
{
- struct gdb_service *gdb_service;
- struct target *target = all_targets;
+ bool use_pipes = 0 == port;
+ struct gdb_service *gdb_service = malloc(sizeof(struct gdb_service));
+ if (NULL == gdb_service)
+ return -ENOMEM;
- if (!target)
- {
- LOG_WARNING("no gdb ports allocated as no target has been specified");
- return ERROR_OK;
- }
+ gdb_service->target = target;
+
+ add_service("gdb", use_pipes ? CONNECTION_PIPE : CONNECTION_TCP,
+ port, 1, &gdb_new_connection, &gdb_input,
+ &gdb_connection_closed, gdb_service);
+
+ const char *name = target_name(target);
+ if (use_pipes)
+ LOG_DEBUG("gdb service for target '%s' using pipes", name);
+ else
+ LOG_DEBUG("gdb service for target '%s' on TCP port %u", name, port);
+ return ERROR_OK;
+}
+int gdb_target_add_one(struct target *target)
+{
if (gdb_port == 0 && server_use_pipes == 0)
{
LOG_INFO("gdb port disabled");
return ERROR_OK;
}
+ if (0 == gdb_port_next)
+ gdb_port_next = gdb_port;
- if (server_use_pipes)
+ bool use_pipes = server_use_pipes;
+ static bool server_started_with_pipes = false;
+ if (server_started_with_pipes)
{
- /* only a single gdb connection when using a pipe */
+ LOG_WARNING("gdb service permits one target when using pipes");
+ if (0 == gdb_port)
+ return ERROR_OK;
- gdb_service = malloc(sizeof(struct gdb_service));
- gdb_service->target = target;
+ use_pipes = false;
+ }
- add_service("gdb", CONNECTION_PIPE, 0, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service);
+ int e = gdb_target_start(target, use_pipes ? 0 : gdb_port_next);
+ if (ERROR_OK == e)
+ {
+ server_started_with_pipes |= use_pipes;
+ gdb_port_next++;
+ }
+ return e;
+}
- LOG_DEBUG("gdb service for target %s using pipes",
- target_name(target));
+int gdb_target_add_all(struct target *target)
+{
+ if (NULL == target)
+ {
+ LOG_WARNING("gdb services need one or more targets defined");
+ return ERROR_OK;
}
- else
+
+ while (NULL != target)
{
- unsigned short port = gdb_port;
+ int retval = gdb_target_add_one(target);
+ if (ERROR_OK != retval)
+ return retval;
- while (target)
- {
- gdb_service = malloc(sizeof(struct gdb_service));
- gdb_service->target = target;
-
- add_service("gdb", CONNECTION_TCP,
- port, 1,
- gdb_new_connection, gdb_input,
- gdb_connection_closed, gdb_service);
-
- LOG_DEBUG("gdb service for target %s at TCP port %i",
- target_name(target),
- port);
- target = target->next;
- port++;
- }
+ target = target->next;
}
return ERROR_OK;
/* daemon configuration command gdb_port */
COMMAND_HANDLER(handle_gdb_port_command)
{
- return CALL_COMMAND_HANDLER(server_port_command, &gdb_port);
+ int retval = CALL_COMMAND_HANDLER(server_port_command, &gdb_port);
+ if (ERROR_OK == retval)
+ gdb_port_next = gdb_port;
+ return retval;
}
COMMAND_HANDLER(handle_gdb_memory_map_command)
Code Review / openocd.git / blobdiff