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[PowerPC] add machdep.uprintf_signal sysctl

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Add support for sysctl 'machdep.uprintf_signal' that prints debugging
information on trap signal.

Reviewed by:	jhibbits, luporl, bdragon
Sponsored by:	Eldorado Research Institute (eldorado.org.br)
Differential Revision:	https://reviews.freebsd.org/D26004
This commit is contained in:
Alfredo Dal'Ava Junior 2020-10-08 22:00:31 +00:00
parent 8e82f10172
commit 9470013f5a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=366548
1 changed files with 13 additions and 0 deletions
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13
sys/powerpc/powerpc/trap.c
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@ -153,6 +153,11 @@ static struct powerpc_exception powerpc_exceptions[] = {
{ EXC_LAST, NULL }
};
static int uprintf_signal;
SYSCTL_INT(_machdep, OID_AUTO, uprintf_signal, CTLFLAG_RWTUN,
&uprintf_signal, 0,
"Print debugging information on trap signal to ctty");
#define ESR_BITMASK \
"\20" \
"\040b0\037b1\036b2\035b3\034PIL\033PRR\032PTR\031FP" \
@ -489,6 +494,14 @@ trap(struct trapframe *frame)
ksi.ksi_code = (int) ucode; /* XXX, not POSIX */
ksi.ksi_addr = (void *)addr;
ksi.ksi_trapno = type;
if (uprintf_signal) {
uprintf("pid %d comm %s: signal %d code %d type %d "
"addr 0x%lx r1 0x%lx srr0 0x%lx srr1 0x%lx\n",
p->p_pid, p->p_comm, sig, ucode, type,
(u_long)addr, (u_long)frame->fixreg[1],
(u_long)frame->srr0, (u_long)frame->srr1);
}
trapsignal(td, &ksi);
}