Re: [PATCH v3 09/19] unwind: Introduce sframe user space unwinding

On Fri, Nov 01, 2024 at 12:35:13PM -0700, Josh Poimboeuf wrote:
> On Fri, Nov 01, 2024 at 12:33:07PM -0700, Josh Poimboeuf wrote:
> > On Fri, Nov 01, 2024 at 02:09:08PM -0500, Segher Boessenkool wrote:
> > > On Thu, Oct 31, 2024 at 04:03:13PM -0700, Josh Poimboeuf wrote:
> > > > Actually I just double checked and even the kernel's ELF loader assumes
> > > > that each executable has only a single text start+end address pair.
> > > 
> > > Huh?  What makes you think that?  There can be many executable PT_LOAD
> > > segments in each and every binary.
> > 
> > Right, but for executables (not shared libraries) the kernel seems to
> > assume they're contiguous?  See the 'start_code' and 'end_code'
> > variables in load_elf_binary() load_elf_interp().
> 
> Typo, see load_elf_binary (not load_elf_interp).

Hm, actually AFAICT that's only for reporting things in sysfs/proc.  So
maybe it's assumed but not really "enforced".

-- 
Josh