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1a85970f41
start_addresses in sysdeps/powerpc/powerpc64/start.S is historical baggage that should disappear. Until someone does that, relocating stinfo->main by hand is one solution to the fact that the field may be unrelocated at the time it is accessed. This is similar to what is done for dynamic tags via the D_PTR macro. stinfo->init and stinfo->fini are zero in both powerpc64/start.S and powerpc32/start.S, so make it a little more obvious they are unused by passing NULLs to LIBC_START_MAIN. The makefile change is needed to pick up elf/dl-static-tls.h from dl-machine.h. Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
114 lines
3.4 KiB
C
114 lines
3.4 KiB
C
/* Copyright (C) 1998-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdlib.h>
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#include <unistd.h>
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#include <ldsodefs.h>
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#include <sysdep.h>
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#ifndef SHARED
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#include <hwcapinfo.h>
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#endif
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#if ENABLE_STATIC_PIE && !defined SHARED
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/* For elf_machine_load_address. */
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#include <dl-machine.h>
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#endif
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/* The main work is done in the generic function. */
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#define LIBC_START_MAIN generic_start_main
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#define LIBC_START_DISABLE_INLINE
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#define LIBC_START_MAIN_AUXVEC_ARG
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#define MAIN_AUXVEC_ARG
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#define INIT_MAIN_ARGS
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#include <csu/libc-start.c>
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struct startup_info
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{
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void *sda_base;
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int (*main) (int, char **, char **, void *);
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int (*init) (int, char **, char **, void *);
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void (*fini) (void);
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};
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int
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__libc_start_main_impl (int argc, char **argv,
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char **ev,
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ElfW (auxv_t) * auxvec,
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void (*rtld_fini) (void),
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struct startup_info *stinfo,
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char **stack_on_entry)
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{
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/* the PPC SVR4 ABI says that the top thing on the stack will
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be a NULL pointer, so if not we assume that we're being called
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as a statically-linked program by Linux... */
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if (*stack_on_entry != NULL)
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{
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char **temp;
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/* ...in which case, we have argc as the top thing on the
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stack, followed by argv (NULL-terminated), envp (likewise),
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and the auxiliary vector. */
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/* 32/64-bit agnostic load from stack */
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argc = *(long int *) stack_on_entry;
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argv = stack_on_entry + 1;
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ev = argv + argc + 1;
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#ifdef HAVE_AUX_VECTOR
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temp = ev;
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while (*temp != NULL)
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++temp;
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auxvec = (ElfW (auxv_t) *)++ temp;
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#endif
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rtld_fini = NULL;
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}
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for (ElfW (auxv_t) * av = auxvec; av->a_type != AT_NULL; ++av)
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switch (av->a_type)
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{
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/* For the static case, we also need _dl_hwcap, _dl_hwcap2 and
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_dl_platform, so we can call
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__tcb_parse_hwcap_and_convert_at_platform (). */
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#ifndef SHARED
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case AT_HWCAP:
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_dl_hwcap = (unsigned long int) av->a_un.a_val;
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break;
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case AT_HWCAP2:
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_dl_hwcap2 = (unsigned long int) av->a_un.a_val;
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break;
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case AT_PLATFORM:
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_dl_platform = (void *) av->a_un.a_val;
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break;
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#endif
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}
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/* Initialize hwcap/hwcap2 and platform data so it can be copied to
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the TCB later in __libc_setup_tls (). (static case only). */
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#ifndef SHARED
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__tcb_parse_hwcap_and_convert_at_platform ();
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#endif
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void *stmain = stinfo->main;
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#if ENABLE_STATIC_PIE && !defined SHARED
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struct link_map *map = _dl_get_dl_main_map ();
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if (!map->l_relocated)
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stmain = (char *) stmain + elf_machine_load_address ();
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#endif
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return generic_start_main (stmain, argc, argv, auxvec,
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NULL, NULL, rtld_fini,
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stack_on_entry);
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}
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DEFINE_LIBC_START_MAIN_VERSION
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