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Work around some nasty bugs on the [beta] Itanium2's E1000 UNDI driver.

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Bug#1: The GetStatus() function returns radically different pointers that
do not match any packets we transmitted.  I think it might be pointing to
a copy of the packet or something.  Since we do not transmit more than
one packet at a time, just wait for "anything".

Bug#2: The Receive() function takes a pointer and a length.  However, it
either ignores the length or otherwise does bad things and writes outside
of ptr[0] through ptr[len-1].  This is bad and causes massive stack
corruption for us since we are receiving packets into small buffers on
the stack.  Instead, Receive() into a large enough buffer and bcopy the
data to the requested area.
This commit is contained in:
Peter Wemm 2002-07-20 03:51:53 +00:00
parent 296c758b66
commit 914ecdc8ea
1 changed files with 20 additions and 5 deletions
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25
sys/boot/efi/libefi/efinet.c
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@ -102,10 +102,14 @@ efinet_put(struct iodesc *desc, void *pkt, size_t len)
return -1;
/* Wait for the buffer to be transmitted */
buf = 0; /* XXX Is this needed? */
do {
buf = 0; /* XXX Is this needed? */
status = net->GetStatus(net, 0, &buf);
} while (status == EFI_SUCCESS && buf != pkt);
/*
* XXX EFI1.1 and the E1000 card returns a different
* address than we gave. Sigh.
*/
} while (status == EFI_SUCCESS && buf == 0);
/* XXX How do we deal with status != EFI_SUCCESS now? */
return (status == EFI_SUCCESS) ? len : -1;
@ -120,15 +124,26 @@ efinet_get(struct iodesc *desc, void *pkt, size_t len, time_t timeout)
EFI_STATUS status;
UINTN bufsz;
time_t t;
char buf[2048];
net = nif->nif_devdata;
t = time(0);
while ((time(0) - t) < timeout) {
bufsz = len;
status = net->Receive(net, 0, &bufsz, pkt, 0, 0, 0);
if (status == EFI_SUCCESS)
bufsz = sizeof(buf);
status = net->Receive(net, 0, &bufsz, buf, 0, 0, 0);
if (status == EFI_SUCCESS) {
/*
* XXX EFI1.1 and the E1000 card trash our
* workspace if we do not do this silly copy.
* Either they are not respecting the len
* value or do not like the alignment.
*/
if (bufsz > len)
bufsz = len;
bcopy(buf, pkt, bufsz);
return bufsz;
}
if (status != EFI_NOT_READY)
return 0;
}