Constify received GDB packet

v2:
- Split work into separate patches

The received packet will not be altered in any of the processing functions.
Some it can be made "const".

Change-Id: I7bb410224cf6daa74a6c494624176ccb9ae638ac
Signed-off-by: Christian Eggers <ceggers@gmx.de>
Reviewed-on: http://openocd.zylin.com/1919
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

8 files changed, 46 insertions, 46 deletions

diff --git a/src/rtos/linux.c b/src/rtos/linux.c
index b98cf453..2f5d2fb9 100644
--- a/src/rtos/linux.c
+++ b/src/rtos/linux.c
@@ -351,7 +351,7 @@ const struct rtos_type Linux_os = {
 	.ps_command = linux_ps_command,
 };
 
-static int linux_thread_packet(struct connection *connection, char *packet,
+static int linux_thread_packet(struct connection *connection, char const *packet,
 		int packet_size);
 static void linux_identify_current_threads(struct target *target);
 
@@ -1117,7 +1117,7 @@ static int linux_task_update(struct target *target, int context)
 }
 
 int linux_gdb_thread_packet(struct target *target,
-	struct connection *connection, char *packet,
+	struct connection *connection, char const *packet,
 	int packet_size)
 {
 	int retval;
@@ -1153,7 +1153,7 @@ int linux_gdb_thread_packet(struct target *target,
 }
 
 int linux_gdb_thread_update(struct target *target,
-	struct connection *connection, char *packet,
+	struct connection *connection, char const *packet,
 	int packet_size)
 {
 	int found = 0;
@@ -1200,7 +1200,7 @@ int linux_gdb_thread_update(struct target *target,
 }
 
 int linux_thread_extra_info(struct target *target,
-	struct connection *connection, char *packet,
+	struct connection *connection, char const *packet,
 	int packet_size)
 {
 	int64_t threadid = 0;
@@ -1247,7 +1247,7 @@ int linux_thread_extra_info(struct target *target,
 }
 
 int linux_gdb_T_packet(struct connection *connection,
-	struct target *target, char *packet, int packet_size)
+	struct target *target, char const *packet, int packet_size)
 {
 	int64_t threadid;
 	struct linux_os *linux_os = (struct linux_os *)
@@ -1308,7 +1308,7 @@ int linux_gdb_T_packet(struct connection *connection,
 }
 
 int linux_gdb_h_packet(struct connection *connection,
-	struct target *target, char *packet, int packet_size)
+	struct target *target, char const *packet, int packet_size)
 {
 	struct linux_os *linux_os = (struct linux_os *)
 		target->rtos->rtos_specific_params;
@@ -1376,7 +1376,7 @@ int linux_gdb_h_packet(struct connection *connection,
 	return ERROR_OK;
 }
 
-static int linux_thread_packet(struct connection *connection, char *packet,
+static int linux_thread_packet(struct connection *connection, char const *packet,
 	int packet_size)
 {
 	int retval = ERROR_OK;
diff --git a/src/rtos/rtos.c b/src/rtos/rtos.c
index e9a17ea2..1cb6958c 100644
--- a/src/rtos/rtos.c
+++ b/src/rtos/rtos.c
@@ -46,7 +46,7 @@ static struct rtos_type *rtos_types[] = {
 	NULL
 };
 
-int rtos_thread_packet(struct connection *connection, char *packet, int packet_size);
+int rtos_thread_packet(struct connection *connection, const char *packet, int packet_size);
 
 int rtos_smp_init(struct target *target)
 {
@@ -138,7 +138,7 @@ int rtos_create(Jim_GetOptInfo *goi, struct target *target)
 	return JIM_ERR;
 }
 
-int gdb_thread_packet(struct connection *connection, char *packet, int packet_size)
+int gdb_thread_packet(struct connection *connection, char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 	if (target->rtos == NULL)
@@ -186,7 +186,7 @@ static char *next_symbol(struct rtos *os, char *cur_symbol, uint64_t cur_addr)
  *
  * rtos_qsymbol() returns 1 if an RTOS has been detected, or 0 otherwise.
  */
-int rtos_qsymbol(struct connection *connection, char *packet, int packet_size)
+int rtos_qsymbol(struct connection *connection, char const *packet, int packet_size)
 {
 	int rtos_detected = 0;
 	uint64_t addr = 0;
@@ -254,7 +254,7 @@ done:
 	return rtos_detected;
 }
 
-int rtos_thread_packet(struct connection *connection, char *packet, int packet_size)
+int rtos_thread_packet(struct connection *connection, char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 
diff --git a/src/rtos/rtos.h b/src/rtos/rtos.h
index f8aa33f1..a81f67e2 100644
--- a/src/rtos/rtos.h
+++ b/src/rtos/rtos.h
@@ -56,7 +56,7 @@ struct rtos {
 	threadid_t current_thread;
 	struct thread_detail *thread_details;
 	int thread_count;
-	int (*gdb_thread_packet)(struct connection *connection, char *packet, int packet_size);
+	int (*gdb_thread_packet)(struct connection *connection, char const *packet, int packet_size);
 	void *rtos_specific_params;
 };
 
@@ -95,12 +95,12 @@ int rtos_generic_stack_read(struct target *target,
 		int64_t stack_ptr,
 		char **hex_reg_list);
 int rtos_try_next(struct target *target);
-int gdb_thread_packet(struct connection *connection, char *packet, int packet_size);
+int gdb_thread_packet(struct connection *connection, char const *packet, int packet_size);
 int rtos_get_gdb_reg_list(struct connection *connection);
 int rtos_update_threads(struct target *target);
 void rtos_free_threadlist(struct rtos *rtos);
 int rtos_smp_init(struct target *target);
 /*  function for handling symbol access */
-int rtos_qsymbol(struct connection *connection, char *packet, int packet_size);
+int rtos_qsymbol(struct connection *connection, char const *packet, int packet_size);
 
 #endif	/* RTOS_H */
diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c
index 0b28287d..d4cc2744 100644
--- a/src/server/gdb_server.c
+++ b/src/server/gdb_server.c
@@ -1044,7 +1044,7 @@ static void gdb_send_error(struct connection *connection, uint8_t the_error)
 }
 
 static int gdb_last_signal_packet(struct connection *connection,
-		char *packet, int packet_size)
+		char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 	struct gdb_connection *gdb_con = connection->priv;
@@ -1101,7 +1101,7 @@ static void gdb_str_to_target(struct target *target,
 
 /* copy over in register buffer */
 static void gdb_target_to_reg(struct target *target,
-		char *tstr, int str_len, uint8_t *bin)
+		char const *tstr, int str_len, uint8_t *bin)
 {
 	if (str_len % 2) {
 		LOG_ERROR("BUG: gdb value with uneven number of characters encountered");
@@ -1122,7 +1122,7 @@ static void gdb_target_to_reg(struct target *target,
 }
 
 static int gdb_get_registers_packet(struct connection *connection,
-		char *packet, int packet_size)
+		char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 	struct reg **reg_list;
@@ -1178,14 +1178,14 @@ static int gdb_get_registers_packet(struct connection *connection,
 }
 
 static int gdb_set_registers_packet(struct connection *connection,
-		char *packet, int packet_size)
+		char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 	int i;
 	struct reg **reg_list;
 	int reg_list_size;
 	int retval;
-	char *packet_p;
+	char const *packet_p;
 
 #ifdef _DEBUG_GDB_IO_
 	LOG_DEBUG("-");
@@ -1233,7 +1233,7 @@ static int gdb_set_registers_packet(struct connection *connection,
 }
 
 static int gdb_get_register_packet(struct connection *connection,
-	char *packet, int packet_size)
+	char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 	char *reg_packet;
@@ -1272,7 +1272,7 @@ static int gdb_get_register_packet(struct connection *connection,
 }
 
 static int gdb_set_register_packet(struct connection *connection,
-	char *packet, int packet_size)
+	char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 	char *separator;
@@ -1338,7 +1338,7 @@ static int gdb_error(struct connection *connection, int retval)
  * 8191 bytes by the looks of it. Why 8191 bytes instead of 8192?????
  */
 static int gdb_read_memory_packet(struct connection *connection,
-		char *packet, int packet_size)
+		char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 	char *separator;
@@ -1409,7 +1409,7 @@ static int gdb_read_memory_packet(struct connection *connection,
 }
 
 static int gdb_write_memory_packet(struct connection *connection,
-		char *packet, int packet_size)
+		char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 	char *separator;
@@ -1456,7 +1456,7 @@ static int gdb_write_memory_packet(struct connection *connection,
 }
 
 static int gdb_write_memory_binary_packet(struct connection *connection,
-		char *packet, int packet_size)
+		char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 	char *separator;
@@ -1513,7 +1513,7 @@ static int gdb_write_memory_binary_packet(struct connection *connection,
 }
 
 static int gdb_step_continue_packet(struct connection *connection,
-		char *packet, int packet_size)
+		char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 	int current = 0;
@@ -1541,7 +1541,7 @@ static int gdb_step_continue_packet(struct connection *connection,
 }
 
 static int gdb_breakpoint_watchpoint_packet(struct connection *connection,
-		char *packet, int packet_size)
+		char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 	int type;
@@ -1669,7 +1669,7 @@ static void xml_printf(int *retval, char **xml, int *pos, int *size,
 	}
 }
 
-static int decode_xfer_read(char *_buf, char **annex, int *ofs, unsigned int *len)
+static int decode_xfer_read(char const *_buf, char **annex, int *ofs, unsigned int *len)
 {
 	int ret = 0;
 	char *buf = strdup(_buf);
@@ -1721,7 +1721,7 @@ static int compare_bank(const void *a, const void *b)
 }
 
 static int gdb_memory_map(struct connection *connection,
-		char *packet, int packet_size)
+		char const *packet, int packet_size)
 {
 	/* We get away with only specifying flash here. Regions that are not
 	 * specified are treated as if we provided no memory map(if not we
@@ -2265,7 +2265,7 @@ error:
 }
 
 static int gdb_query_packet(struct connection *connection,
-		char *packet, int packet_size)
+		char const *packet, int packet_size)
 {
 	struct command_context *cmd_ctx = connection->cmd_ctx;
 	struct gdb_connection *gdb_connection = connection->priv;
@@ -2414,7 +2414,7 @@ static int gdb_query_packet(struct connection *connection,
 }
 
 static int gdb_v_packet(struct connection *connection,
-		char *packet, int packet_size)
+		char const *packet, int packet_size)
 {
 	struct gdb_connection *gdb_connection = connection->priv;
 	struct gdb_service *gdb_service = connection->service->priv;
@@ -2431,20 +2431,20 @@ static int gdb_v_packet(struct connection *connection,
 		unsigned long addr;
 		unsigned long length;
 
-		char *parse = packet + 12;
+		char const *parse = packet + 12;
 		if (*parse == '\0') {
 			LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
 			return ERROR_SERVER_REMOTE_CLOSED;
 		}
 
-		addr = strtoul(parse, &parse, 16);
+		addr = strtoul(parse, (char **)&parse, 16);
 
 		if (*(parse++) != ',' || *parse == '\0') {
 			LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
 			return ERROR_SERVER_REMOTE_CLOSED;
 		}
 
-		length = strtoul(parse, &parse, 16);
+		length = strtoul(parse, (char **)&parse, 16);
 
 		if (*parse != '\0') {
 			LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
@@ -2487,13 +2487,13 @@ static int gdb_v_packet(struct connection *connection,
 		int retval;
 		unsigned long addr;
 		unsigned long length;
-		char *parse = packet + 12;
+		char const *parse = packet + 12;
 
 		if (*parse == '\0') {
 			LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
 			return ERROR_SERVER_REMOTE_CLOSED;
 		}
-		addr = strtoul(parse, &parse, 16);
+		addr = strtoul(parse, (char **)&parse, 16);
 		if (*(parse++) != ':') {
 			LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
 			return ERROR_SERVER_REMOTE_CLOSED;
@@ -2508,7 +2508,7 @@ static int gdb_v_packet(struct connection *connection,
 
 		/* create new section with content from packet buffer */
 		retval = image_add_section(gdb_connection->vflash_image,
-				addr, length, 0x0, (uint8_t *)parse);
+				addr, length, 0x0, (uint8_t const *)parse);
 		if (retval != ERROR_OK)
 			return retval;
 
@@ -2560,7 +2560,7 @@ static int gdb_detach(struct connection *connection)
  * Fretcode,errno,Ctrl-C flag;call-specific attachment
  */
 static int gdb_fileio_response_packet(struct connection *connection,
-		char *packet, int packet_size)
+		char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 	char *separator;
@@ -2632,7 +2632,7 @@ static int gdb_input_inner(struct connection *connection)
 
 	struct gdb_service *gdb_service = connection->service->priv;
 	struct target *target = gdb_service->target;
-	char *packet = gdb_packet_buffer;
+	char const *packet = gdb_packet_buffer;
 	int packet_size;
 	int retval;
 	struct gdb_connection *gdb_con = connection->priv;
@@ -2651,12 +2651,12 @@ static int gdb_input_inner(struct connection *connection)
 	 */
 	do {
 		packet_size = GDB_BUFFER_SIZE-1;
-		retval = gdb_get_packet(connection, packet, &packet_size);
+		retval = gdb_get_packet(connection, gdb_packet_buffer, &packet_size);
 		if (retval != ERROR_OK)
 			return retval;
 
 		/* terminate with zero */
-		packet[packet_size] = 0;
+		gdb_packet_buffer[packet_size] = '\0';
 
 		if (LOG_LEVEL_IS(LOG_LVL_DEBUG)) {
 			if (packet[0] == 'X') {
diff --git a/src/target/image.c b/src/target/image.c
index 8bcba349..07420b1f 100644
--- a/src/target/image.c
+++ b/src/target/image.c
@@ -902,7 +902,7 @@ int image_read_section(struct image *image,
 	return ERROR_OK;
 }
 
-int image_add_section(struct image *image, uint32_t base, uint32_t size, int flags, uint8_t *data)
+int image_add_section(struct image *image, uint32_t base, uint32_t size, int flags, uint8_t const *data)
 {
 	struct imagesection *section;
 
diff --git a/src/target/image.h b/src/target/image.h
index 9741308e..5aeba2f7 100644
--- a/src/target/image.h
+++ b/src/target/image.h
@@ -99,7 +99,7 @@ int image_read_section(struct image *image, int section, uint32_t offset,
 void image_close(struct image *image);
 
 int image_add_section(struct image *image, uint32_t base, uint32_t size,
-		int flags, uint8_t *data);
+		int flags, uint8_t const *data);
 
 int image_calculate_checksum(uint8_t *buffer, uint32_t nbytes,
 		uint32_t *checksum);
diff --git a/src/target/smp.c b/src/target/smp.c
index d14ceba9..e688304a 100644
--- a/src/target/smp.c
+++ b/src/target/smp.c
@@ -56,7 +56,7 @@
 
 /* packet j :smp status request */
 int gdb_read_smp_packet(struct connection *connection,
-		char *packet, int packet_size)
+		char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 	int retval = ERROR_OK;
@@ -77,7 +77,7 @@ int gdb_read_smp_packet(struct connection *connection,
 
 /* J :  smp set request */
 int gdb_write_smp_packet(struct connection *connection,
-		char *packet, int packet_size)
+		char const *packet, int packet_size)
 {
 	struct target *target = get_target_from_connection(connection);
 	char *separator;
diff --git a/src/target/smp.h b/src/target/smp.h
index fa9fda0c..69a5cd85 100644
--- a/src/target/smp.h
+++ b/src/target/smp.h
@@ -21,7 +21,7 @@
 #include "server/server.h"
 
 int gdb_read_smp_packet(struct connection *connection,
-		char *packet, int packet_size);
+		char const *packet, int packet_size);
 int gdb_write_smp_packet(struct connection *connection,
-		char *packet, int packet_size);
+		char const *packet, int packet_size);