On Thu, Dec 10, 2015 at 08:56:27PM +0100, Jiri Kosina wrote:
> On Thu, 10 Dec 2015, Minfei Huang wrote:
>
> > > + klp_for_each_reloc_sec(obj, reloc_sec) {
> > > + relindex = reloc_sec->index;
> > > + num_relas = pmod->sechdrs[relindex].sh_size / sizeof(Elf_Rela);
> > > + rela = (Elf_Rela *) pmod->sechdrs[relindex].sh_addr;
> > > +
> > > + /* For each rela in this __klp_rela section */
> > > + for (i = 0; i < num_relas; i++, rela++) {
> > > + sym = symtab + ELF_R_SYM(rela->r_info);
> > > + symname = pmod->core_strtab + sym->st_name;
> > > +
> > > + if (sym->st_shndx == SHN_LIVEPATCH) {
> > > + if (sym->st_info == 'K')
> > > + ret = klp_find_external_symbol(pmod,
> > > symname, &addr);
> > > + else
> > > + ret = klp_find_object_symbol(obj->name,
> > > symname, &addr);
> > > + if (ret)
> > > + return ret;
> > > + sym->st_value = addr;
> > > + }
> > > }
> > > + ret = apply_relocate_add(pmod->sechdrs, pmod->core_strtab,
> > > + pmod->index.sym, relindex, pmod);
> >
> > It is more appropiate to test the ret.
>
> And if error is encountered ... then you'd propose to do what?
>
> The code is correct as is; the return value is propagated properly to
> caller, and all the existing callers have proper error handling.
apply_relocate_add() is called from inside a loop, so if there's an
error, it should return immediately instead of continuing the next
iteration.
--
Josh
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