On Sun, 26 May 2013 16:38:23 +0200 Thomas Schwinge <tho...@codesourcery.com> wrote:
> Hi! > > Re-submitting an oldie of Samuel's: > > On Sun, 24 Jun 2007 17:45:35 +0200, Samuel Thibault > <samuel.thiba...@ens-lyon.org> wrote: > > - _start points on the first instruction, not on the elf header. > > __executable_start does point on the elf header. > > > --- sysdeps/mach/hurd/i386/init-first.c.orig 2007-06-23 > > 19:27:14.000000000 +0000 > > +++ sysdeps/mach/hurd/i386/init-first.c 2007-06-23 21:41:40.000000000 > > +0000 > > @@ -116,14 +116,14 @@ > > /* We may need to see our own phdrs, e.g. for TLS setup. > > Try the usual kludge to find the headers without help from > > the exec server. */ > > - extern const void _start; > > - const ElfW(Ehdr) *const ehdr = &_start; > > + extern const void __executable_start; > > + const ElfW(Ehdr) *const ehdr = &__executable_start; > > _dl_phdr = (ElfW(Phdr) *) ((const void *) ehdr + ehdr->e_phoff); > > _dl_phnum = ehdr->e_phnum; > > assert (ehdr->e_phentsize == sizeof (ElfW(Phdr))); > > This is, as far as I can tell, the only such usage of _start in glibc. > > OK to commit? > > * sysdeps/mach/hurd/i386/init-first.c (init1): Use > __executable_start symbol intsead instead of _start. > > diff --git sysdeps/mach/hurd/i386/init-first.c > sysdeps/mach/hurd/i386/init-first.c > index fc3330c..7031ed4 100644 > --- sysdeps/mach/hurd/i386/init-first.c > +++ sysdeps/mach/hurd/i386/init-first.c > @@ -125,8 +125,8 @@ init1 (int argc, char *arg0, ...) > /* We may need to see our own phdrs, e.g. for TLS setup. > Try the usual kludge to find the headers without help from > the exec server. */ > - extern const void _start; > - const ElfW(Ehdr) *const ehdr = &_start; > + extern const void __executable_start; > + const ElfW(Ehdr) *const ehdr = &__executable_start; > _dl_phdr = (const void *) ehdr + ehdr->e_phoff; > _dl_phnum = ehdr->e_phnum; > assert (ehdr->e_phentsize == sizeof (ElfW(Phdr))); > > > Grüße, > Thomas -- Regards, Anatoly
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