diff options
Diffstat (limited to 'share/man/man4/bpf.4')
| -rw-r--r-- | share/man/man4/bpf.4 | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/share/man/man4/bpf.4 b/share/man/man4/bpf.4 index 85beb07..e69456a 100644 --- a/share/man/man4/bpf.4 +++ b/share/man/man4/bpf.4 @@ -804,7 +804,6 @@ are the corresponding fields in the instruction definition. .Dq len refers to the length of the packet. -.Pp .Bl -tag -width BPF_STXx .It Dv BPF_LD These instructions copy a value into the accumulator. @@ -833,7 +832,6 @@ or byte The semantics of all the recognized .Dv BPF_LD instructions follow. -.Pp .Bd -literal BPF_LD+BPF_W+BPF_ABS A <- P[k:4] BPF_LD+BPF_H+BPF_ABS A <- P[k:2] @@ -852,7 +850,6 @@ the addressing modes are more restrictive than those of the accumulator loads, but they include .Dv BPF_MSH , a hack for efficiently loading the IP header length. -.Pp .Bd -literal BPF_LDX+BPF_W+BPF_IMM X <- k BPF_LDX+BPF_W+BPF_MEM X <- M[k] @@ -863,13 +860,11 @@ BPF_LDX+BPF_B+BPF_MSH X <- 4*(P[k:1]&0xf) This instruction stores the accumulator into the scratch memory. We do not need an addressing mode since there is only one possibility for the destination. -.Pp .Bd -literal BPF_ST M[k] <- A .Ed .It Dv BPF_STX This instruction stores the index register in the scratch memory store. -.Pp .Bd -literal BPF_STX M[k] <- X .Ed @@ -880,7 +875,6 @@ For binary operations, a source mode is required .Dv ( BPF_K or .Dv BPF_X ) . -.Pp .Bd -literal BPF_ALU+BPF_ADD+BPF_K A <- A + k BPF_ALU+BPF_SUB+BPF_K A <- A - k @@ -916,7 +910,6 @@ opcode uses the 32 bit .Li k field as the offset, allowing arbitrarily distant destinations. All conditionals use unsigned comparison conventions. -.Pp .Bd -literal BPF_JMP+BPF_JA pc += k BPF_JMP+BPF_JGT+BPF_K pc += (A > k) ? jt : jf @@ -936,7 +929,6 @@ The return value is either a constant .Pq Dv BPF_K or the accumulator .Pq Dv BPF_A . -.Pp .Bd -literal BPF_RET+BPF_A accept A bytes BPF_RET+BPF_K accept k bytes @@ -947,7 +939,6 @@ fit into the above classes, and for any new instructions that might need to be added. Currently, these are the register transfer instructions that copy the index register to the accumulator or vice versa. -.Pp .Bd -literal BPF_MISC+BPF_TAX X <- A BPF_MISC+BPF_TXA A <- X |
