Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Correct handling of nxt==0 (skip pseudoheader) case.

Browse Source 
(It helps a lot if registers contain the expected values)
While we're in here, also correct parameter names in the lint goo.
This commit is contained in:
sommerfeld 2001-05-23 15:56:51 +00:00
parent 3ab3c1bb26
commit e171bbe08e
1 changed files with 4 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
sys/arch/i386/i386/in_cksum.s
View File

@ -1,4 +1,4 @@
/* $NetBSD: in_cksum.s,v 1.14 2001/05/21 06:13:12 perry Exp $ */
/* $NetBSD: in_cksum.s,v 1.15 2001/05/23 15:56:51 sommerfeld Exp $ */
/*-
* Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
@ -125,8 +125,7 @@
adcw $0, %ax
/* XXX There should really be a section 9 for this. --PM, May 21, 2001 */
/* XXX The prototype below deserves better parameter names. */
/* LINTSTUB: Func: int in4_cksum(struct mbuf *m, u_int8_t i, int j, int k) */
/* LINTSTUB: Func: int in4_cksum(struct mbuf *m, u_int8_t nxt, int off, int len) */
ENTRY(in4_cksum)
pushl %ebp
pushl %ebx
@ -134,12 +133,12 @@ ENTRY(in4_cksum)
movl 16(%esp), %ebp
movzbl 20(%esp), %eax /* sum = nxt */
movl 24(%esp), %edx /* %edx = off */
movl 28(%esp), %esi /* %esi = len */
testl %eax, %eax
jz mbuf_loop_0 /* skip if nxt == 0 */
movl 28(%esp), %esi
movl M_DATA(%ebp), %ebx
addl %esi, %eax /* sum += len */
movl 24(%esp), %edx /* %edx = off */
shll $8, %eax /* sum = htons(sum) */
ADD(IP_SRC) /* sum += ip->ip_src */