>>> On 12.05.15 at 20:42, <hjl.to...@gmail.com> wrote: > Here is the updated proposal. I changed nop prefix from 0x48 > to 0x67 and clarified how foo@GOTPCREL(%rip) should be > resolved.
Mind clarifying how 67 is better than 48? > I am proposing to add 2 new relocations, R_X86_64_RELAX_PC32 and > R_X86_64_RELAX_PLT32: > > 1. They can only be used on 32-bit direct call/jmp instructions. > 2. call/jmp instructions must have a 0x67 prefix, which is the address > size prefix and is ignored by 32-bit direct call/jmp instructions. The same could have been said several years ago about segment overrides used with conditional branches, yet they obtained a meaning (even if only affecting performance, not correctness). Is it anywhere publicly stated that the address size override will continue to be ignored? Jan
