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s390/bpf: Zero extend parameters before calling C function

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The s390x ABI requires to zero extend parameters before functions
are called.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Michael Holzheu 2015-01-15 10:23:46 +01:00 committed by Martin Schwidefsky
parent 1a92b2deaf
commit fe82bbae36
1 changed files with 6 additions and 4 deletions
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10
arch/s390/net/bpf_jit.S
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@ -46,7 +46,7 @@ sk_load_word_slow:
lgr %r9,%r2 # save %r2
lgr %r3,%r1 # offset
la %r4,160(%r15) # pointer to temp buffer
lhi %r5,4 # 4 bytes
lghi %r5,4 # 4 bytes
brasl %r14,skb_copy_bits # get data from skb
l %r5,160(%r15) # load result from temp buffer
ltgr %r2,%r2 # set cc to (%r2 != 0)
@ -72,7 +72,7 @@ sk_load_half_slow:
lgr %r9,%r2 # save %r2
lgr %r3,%r1 # offset
la %r4,162(%r15) # pointer to temp buffer
lhi %r5,2 # 2 bytes
lghi %r5,2 # 2 bytes
brasl %r14,skb_copy_bits # get data from skb
xc 160(2,%r15),160(%r15)
l %r5,160(%r15) # load result from temp buffer
@ -97,8 +97,9 @@ ENTRY(sk_load_byte)
sk_load_byte_slow:
lgr %r9,%r2 # save %r2
lgr %r3,%r1 # offset
la %r4,163(%r15) # pointer to temp buffer
lhi %r5,1 # 1 bytes
lghi %r5,1 # 1 byte
brasl %r14,skb_copy_bits # get data from skb
xc 160(3,%r15),160(%r15)
l %r5,160(%r15) # load result from temp buffer
@ -120,8 +121,9 @@ ENTRY(sk_load_byte_msh)
sk_load_byte_msh_slow:
lgr %r9,%r2 # save %r2
lgr %r3,%r1 # offset
la %r4,163(%r15) # pointer to temp buffer
lhi %r5,1 # 1 bytes
lghi %r5,1 # 1 byte
brasl %r14,skb_copy_bits # get data from skb
xc 160(3,%r15),160(%r15)
l %r12,160(%r15) # load result from temp buffer