diff options
Diffstat (limited to 'arch/s390/net/bpf_jit.S')
| -rw-r--r-- | arch/s390/net/bpf_jit.S | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/arch/s390/net/bpf_jit.S b/arch/s390/net/bpf_jit.S index 7e45d13816c1..ba44c9f55346 100644 --- a/arch/s390/net/bpf_jit.S +++ b/arch/s390/net/bpf_jit.S | |||
| @@ -22,8 +22,8 @@ | |||
| 22 | * skb_copy_bits takes 4 parameters: | 22 | * skb_copy_bits takes 4 parameters: |
| 23 | * %r2 = skb pointer | 23 | * %r2 = skb pointer |
| 24 | * %r3 = offset into skb data | 24 | * %r3 = offset into skb data |
| 25 | * %r4 = length to copy | 25 | * %r4 = pointer to temp buffer |
| 26 | * %r5 = pointer to temp buffer | 26 | * %r5 = length to copy |
| 27 | */ | 27 | */ |
| 28 | #define SKBDATA %r8 | 28 | #define SKBDATA %r8 |
| 29 | 29 | ||
| @@ -44,8 +44,9 @@ ENTRY(sk_load_word) | |||
| 44 | 44 | ||
| 45 | sk_load_word_slow: | 45 | sk_load_word_slow: |
| 46 | lgr %r9,%r2 # save %r2 | 46 | lgr %r9,%r2 # save %r2 |
| 47 | lhi %r4,4 # 4 bytes | 47 | lgr %r3,%r1 # offset |
| 48 | la %r5,160(%r15) # pointer to temp buffer | 48 | la %r4,160(%r15) # pointer to temp buffer |
| 49 | lghi %r5,4 # 4 bytes | ||
| 49 | brasl %r14,skb_copy_bits # get data from skb | 50 | brasl %r14,skb_copy_bits # get data from skb |
| 50 | l %r5,160(%r15) # load result from temp buffer | 51 | l %r5,160(%r15) # load result from temp buffer |
| 51 | ltgr %r2,%r2 # set cc to (%r2 != 0) | 52 | ltgr %r2,%r2 # set cc to (%r2 != 0) |
| @@ -69,8 +70,9 @@ ENTRY(sk_load_half) | |||
| 69 | 70 | ||
| 70 | sk_load_half_slow: | 71 | sk_load_half_slow: |
| 71 | lgr %r9,%r2 # save %r2 | 72 | lgr %r9,%r2 # save %r2 |
| 72 | lhi %r4,2 # 2 bytes | 73 | lgr %r3,%r1 # offset |
| 73 | la %r5,162(%r15) # pointer to temp buffer | 74 | la %r4,162(%r15) # pointer to temp buffer |
| 75 | lghi %r5,2 # 2 bytes | ||
| 74 | brasl %r14,skb_copy_bits # get data from skb | 76 | brasl %r14,skb_copy_bits # get data from skb |
| 75 | xc 160(2,%r15),160(%r15) | 77 | xc 160(2,%r15),160(%r15) |
| 76 | l %r5,160(%r15) # load result from temp buffer | 78 | l %r5,160(%r15) # load result from temp buffer |
| @@ -95,8 +97,9 @@ ENTRY(sk_load_byte) | |||
| 95 | 97 | ||
| 96 | sk_load_byte_slow: | 98 | sk_load_byte_slow: |
| 97 | lgr %r9,%r2 # save %r2 | 99 | lgr %r9,%r2 # save %r2 |
| 98 | lhi %r4,1 # 1 bytes | 100 | lgr %r3,%r1 # offset |
| 99 | la %r5,163(%r15) # pointer to temp buffer | 101 | la %r4,163(%r15) # pointer to temp buffer |
| 102 | lghi %r5,1 # 1 byte | ||
| 100 | brasl %r14,skb_copy_bits # get data from skb | 103 | brasl %r14,skb_copy_bits # get data from skb |
| 101 | xc 160(3,%r15),160(%r15) | 104 | xc 160(3,%r15),160(%r15) |
| 102 | l %r5,160(%r15) # load result from temp buffer | 105 | l %r5,160(%r15) # load result from temp buffer |
| @@ -104,11 +107,11 @@ sk_load_byte_slow: | |||
| 104 | lgr %r2,%r9 # restore %r2 | 107 | lgr %r2,%r9 # restore %r2 |
| 105 | br %r8 | 108 | br %r8 |
| 106 | 109 | ||
| 107 | /* A = (*(u8 *)(skb->data+K) & 0xf) << 2 */ | 110 | /* X = (*(u8 *)(skb->data+K) & 0xf) << 2 */ |
| 108 | ENTRY(sk_load_byte_msh) | 111 | ENTRY(sk_load_byte_msh) |
| 109 | llgfr %r1,%r3 # extend offset | 112 | llgfr %r1,%r3 # extend offset |
| 110 | clr %r11,%r3 # hlen < offset ? | 113 | clr %r11,%r3 # hlen < offset ? |
| 111 | jle sk_load_byte_slow | 114 | jle sk_load_byte_msh_slow |
| 112 | lhi %r12,0 | 115 | lhi %r12,0 |
| 113 | ic %r12,0(%r1,%r10) # get byte from skb | 116 | ic %r12,0(%r1,%r10) # get byte from skb |
| 114 | nill %r12,0x0f | 117 | nill %r12,0x0f |
| @@ -118,8 +121,9 @@ ENTRY(sk_load_byte_msh) | |||
| 118 | 121 | ||
| 119 | sk_load_byte_msh_slow: | 122 | sk_load_byte_msh_slow: |
| 120 | lgr %r9,%r2 # save %r2 | 123 | lgr %r9,%r2 # save %r2 |
| 121 | lhi %r4,2 # 2 bytes | 124 | lgr %r3,%r1 # offset |
| 122 | la %r5,162(%r15) # pointer to temp buffer | 125 | la %r4,163(%r15) # pointer to temp buffer |
| 126 | lghi %r5,1 # 1 byte | ||
| 123 | brasl %r14,skb_copy_bits # get data from skb | 127 | brasl %r14,skb_copy_bits # get data from skb |
| 124 | xc 160(3,%r15),160(%r15) | 128 | xc 160(3,%r15),160(%r15) |
| 125 | l %r12,160(%r15) # load result from temp buffer | 129 | l %r12,160(%r15) # load result from temp buffer |