Re: [RFC] unexport linux/elfcore.h

On Thu, Jun 11, 2020 at 01:01:40PM -0700, Linus Torvalds wrote:

On Thu, Jun 11, 2020 at 8:23 AM Al Viro [off-list ref] wrote:

quoted

I mean something like this.  Objections?

I'm not seeing that alot of people would care.

That said, is there any reason not to try to fix it instead and expose
elf_gregset_t some way?

But I do suspect it all really boils down to "nobody cares". If you
can't find somebody to speak up for it, might as well remove it.

Anyone who wants to use that stuff includes sys/procfs.h anyway (since
1996).  As for the reasons...  I would love to kill off these gems, for
example:
#define PRSTATUS_SIZE(S, R) (R != sizeof(S.pr_reg) ? 144 : 296)
#define SET_PR_FPVALID(S, V, R) \
  do { *(int *) (((void *) &((S)->pr_reg)) + R) = (V); } \
  while (0)
(x86 asm/compat.h)  And being able to massage the definition of
elf_prstatus (while keeping the size and layout - it describes
a part of file format, after all) would simplify the life alot.

struct __kernel_elf_prstatus would be an obvious solution, but...
nobody in userland pulls the definition in linux/elfcore.h and
hadn't been able to do that for at least a decade (if not more than
that).  So I'd rather get rid of exporting it.