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- ignore data aborts during gdb memory read packets by default, and return 0x0 instead 

- add configuration option "gdb_report_data_abort <enable|disable> to enable reporting of data aborts during gdb memory read packets
- thanks to Øyvind Harboe for identifying the problem with GDB and data aborts
- fix some warnings in gdb_server.c



git-svn-id: svn://svn.berlios.de/openocd/trunk@307 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
drath 2008-02-18 17:59:06 +00:00
parent f2a5a1ce81
commit 48709fba0b
1 changed files with 37 additions and 10 deletions
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47
src/server/gdb_server.c
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@ -64,6 +64,10 @@ enum gdb_detach_mode detach_mode = GDB_DETACH_RESUME;
int gdb_use_memory_map = 0;
int gdb_flash_program = 0;
/* if set, data aborts cause an error to be reported in memory read packets
* see the code in gdb_read_memory_packet() for further explanations */
int gdb_report_data_abort = 0;
int gdb_last_signal(target_t *target)
{
switch (target->debug_reason)
@ -1058,8 +1062,7 @@ int gdb_read_memory_packet(connection_t *connection, target_t *target, char *pac
retval = target_read_buffer(target, addr, len, buffer);
#if 0
if (retval == ERROR_TARGET_DATA_ABORT)
if ((retval == ERROR_TARGET_DATA_ABORT) && (!gdb_report_data_abort))
{
/* TODO : Here we have to lie and send back all zero's lest stack traces won't work.
* At some point this might be fixed in GDB, in which case this code can be removed.
@ -1069,11 +1072,13 @@ int gdb_read_memory_packet(connection_t *connection, target_t *target, char *pac
* eventually
*
* http://sourceware.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gdb&pr=2395
*
* For now, the default is to fix up things to make current GDB versions work.
* This can be overwritten using the gdb_report_data_abort <'enable'|'disable'> command.
*/
memset(buffer, 0, len);
retval = ERROR_OK;
}
#endif
if (retval == ERROR_OK)
{
@ -1187,11 +1192,11 @@ int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, c
}
retval = ERROR_OK;
if( len ) {
if (len)
{
DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
retval = target_write_buffer(target, addr, len, separator);
retval = target_write_buffer(target, addr, len, (u8*)separator);
}
if (retval == ERROR_OK)
@ -1391,7 +1396,7 @@ void xml_printf(int *retval, char **xml, int *pos, int *size, const char *fmt, .
}
}
static int decode_xfer_read (char *buf, char **annex, int *ofs, unsigned int *len)
static int decode_xfer_read(char *buf, char **annex, int *ofs, unsigned int *len)
{
char *separator;
@ -1465,7 +1470,7 @@ int gdb_query_packet(connection_t *connection, target_t *target, char *packet, i
if (packet_size > 5)
{
int retval;
u8 gdb_reply[10];
char gdb_reply[10];
char *separator;
u32 checksum;
u32 addr = 0;
@ -1599,13 +1604,13 @@ int gdb_query_packet(connection_t *connection, target_t *target, char *packet, i
int retval = ERROR_OK;
int offset;
int length;
unsigned int length;
char *annex;
/* skip command character */
packet += 20;
if (decode_xfer_read( packet, &annex, &offset, &length ) < 0)
if (decode_xfer_read(packet, &annex, &offset, &length) < 0)
{
gdb_send_error(connection, 01);
return ERROR_OK;
@ -2071,6 +2076,26 @@ int handle_gdb_flash_program_command(struct command_context_s *cmd_ctx, char *cm
return ERROR_OK;
}
int handle_gdb_report_data_abort_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (argc == 1)
{
if (strcmp(args[0], "enable") == 0)
{
gdb_report_data_abort = 1;
return ERROR_OK;
}
else if (strcmp(args[0], "disable") == 0)
{
gdb_report_data_abort = 0;
return ERROR_OK;
}
}
WARNING("invalid gdb_report_data_abort configuration directive: %s", args[0]);
return ERROR_OK;
}
int gdb_register_commands(command_context_t *command_context)
{
register_command(command_context, NULL, "gdb_port", handle_gdb_port_command,
@ -2081,5 +2106,7 @@ int gdb_register_commands(command_context_t *command_context)
COMMAND_CONFIG, "");
register_command(command_context, NULL, "gdb_flash_program", handle_gdb_flash_program_command,
COMMAND_CONFIG, "");
register_command(command_context, NULL, "gdb_report_data_abort", handle_gdb_report_data_abort_command,
COMMAND_CONFIG, "");
return ERROR_OK;
}