ISA: clarify call local offset

[dthaler]

Under table 7 in the Jump instructions section it (correctly) says (from issue #130):

where 'PC' denotes the program counter, and the offset to increment by is in units of 64-bit instructions relative to the instruction following the jump instruction. Thus 'PC += 1' skips execution of the next instruction if it's a basic instruction or results in undefined behavior if the next instruction is a 128-bit wide instruction.

But then section 4.3.2 says:

Program-local functions are functions exposed by the same BPF program as the caller, and are referenced by offset from the call instruction, similar to JA.

It should more correctly say from the instruction following the call instruction.

[dthaler]

Proposed patch posted at https://mailarchive.ietf.org/arch/msg/bpf/ihI1175Pg574h-biBvimsce2ayA/

[dthaler]

Fixed in draft-03