On Tue, 30 Jun 2020, Al Viro wrote: > The obvious solution is to introduce struct elf_prstatus_fdpic > and use that in binfmt_elf_fdpic.c, taking these fields out of the > normal struct elf_prstatus. Unfortunately, the damn thing is defined in > include/uapi/linux/elfcore.h, so nominally it's a part of userland ABI. > However, not a single userland program actually includes linux/elfcore.h. > The reason is that the definition in there uses elf_gregset_t as a member, > and _that_ is not defined anywhere in the exported headers. It is defined > in (libc) sys/procfs.h, but the same file defines struct elf_prstatus > as well. So if you try to include linux/elfcore.h without having already > pulled sys/procfs.h, it'll break on incomplete type of a member. And if > you have pulled sys/procfs.h, it'll break on redefining a structure. > IOW, it's not usable and it never had been; as the matter of fact, > that's the reason sys/procfs.h had been introduced back in 1996.
Huh! That's convenient alright. Acked-by: Nicolas Pitre <[email protected]> Nicolas
