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kdb,kgdb: Implement switch and pass buffer from kdb -> gdb

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When switching from kdb mode to kgdb mode packets were getting lost
depending on the size of the fifo queue of the serial chip.  When gdb
initially connects if it is in kdb mode it should entirely send any
character buffer over to the gdbstub when switching connections.

Previously kdb was zero'ing out the character buffer and this could
lead to gdb failing to connect at all, or a lengthy pause could occur
on the initial connect.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
This commit is contained in:
Jason Wessel
2011-05-23 13:17:41 -05:00
parent 3bdb65ec95
commit f679c4985b
4 changed files with 29 additions and 21 deletions
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1
kernel/debug/kdb/kdb_private.h
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@@ -218,6 +218,7 @@ extern void kdb_print_nameval(const char *name, unsigned long val);
extern void kdb_send_sig_info(struct task_struct *p, struct siginfo *info);
extern void kdb_meminfo_proc_show(void);
extern char *kdb_getstr(char *, size_t, char *);
extern void kdb_gdb_state_pass(char *buf);
/* Defines for kdb_symbol_print */
#define KDB_SP_SPACEB 0x0001 /* Space before string */