CORE_ADDR
kgdb_lookup(const char *sym)
{
CORE_ADDR addr;
char *name;
asprintf(&name, "&%s", sym);
addr = kgdb_parse(name);
free(name);
return (addr);
}
CORE_ADDR
kgdb_trgt_core_pcb(u_int cpuid)
{
CORE_ADDR addr;
char *expr;
asprintf(&expr, "&cpuid_to_pcpu[%d]->pc_md.pcb", cpuid);
addr = kgdb_parse(expr);
free(expr);
return (addr);
}
void
kgdb_dmesg(void)
{
CORE_ADDR bufp;
int size, rseq, wseq;
char c;
/*
* Display the unread portion of the message buffer. This gives the
* user a some initial data to work from.
*/
if (quiet)
return;
bufp = kgdb_parse("msgbufp->msg_ptr");
size = (int)kgdb_parse("msgbufp->msg_size");
if (bufp == 0 || size == 0)
return;
rseq = (int)kgdb_parse("msgbufp->msg_rseq");
wseq = (int)kgdb_parse("msgbufp->msg_wseq");
rseq = MSGBUF_SEQ_TO_POS(size, rseq);
wseq = MSGBUF_SEQ_TO_POS(size, wseq);
if (rseq == wseq)
return;
printf("\nUnread portion of the kernel message buffer:\n");
while (rseq < wseq) {
read_memory(bufp + rseq, &c, 1);
putchar(c);
rseq++;
if (rseq == size)
rseq = 0;
}
if (c != '\n')
putchar('\n');
putchar('\n');
}
void
kgdb_trgt_new_objfile(struct objfile *objfile)
{
/*
* In revision 1.117 of i386/i386/exception.S trap handlers
* were changed to pass trapframes by reference rather than
* by value. Detect this by seeing if the first instruction
* at the 'calltrap' label is a "push %esp" which has the
* opcode 0x54.
*/
if (kgdb_parse("((char *)calltrap)[0]") == 0x54)
ofs_fix = 4;
else
ofs_fix = 0;
}