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ld.so: Adjust the auxv if ld.so is directly invoked.

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If a binary gets invoked by passing it as argument to ld.so the stack
still holds the auxiliary vector of ld.so when entering the _start
routine of the executable.  So the invocation via ld.so is not fully
transparent to the executable.  This causes problems if the executable
wants to scan the auxv itself.
This commit is contained in:
Andreas Krebbel
2010-01-15 09:09:35 -08:00
committed by Ulrich Drepper
parent 5306d3613a
commit 3a56ea2673
5 changed files with 53 additions and 22 deletions
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9
elf/dl-open.c
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@@ -1,5 +1,5 @@
/* Load a shared object at runtime, relocate it, and run its initializer.
Copyright (C) 1996-2007, 2009 Free Software Foundation, Inc.
Copyright (C) 1996-2007, 2009, 2010 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -40,7 +40,8 @@
extern ElfW(Addr) _dl_sysdep_start (void **start_argptr,
void (*dl_main) (const ElfW(Phdr) *phdr,
ElfW(Word) phnum,
ElfW(Addr) *user_entry));
ElfW(Addr) *user_entry,
ElfW(auxv_t) *auxv));
weak_extern (BP_SYM (_dl_sysdep_start))
extern int __libc_multiple_libcs; /* Defined in init-first.c. */
@@ -346,8 +347,8 @@ dl_open_worker (void *a)
{
/* If this here is the shared object which we want to profile
make sure the profile is started. We can find out whether
this is necessary or not by observing the `_dl_profile_map'
variable. If was NULL but is not NULL afterwars we must
this is necessary or not by observing the `_dl_profile_map'
variable. If was NULL but is not NULL afterwars we must
start the profiling. */
struct link_map *old_profile_map = GL(dl_profile_map);