1 /* Copyright (C) 1998-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
24 #include <hwcapinfo.h>
27 /* The main work is done in the generic function. */
28 #define LIBC_START_MAIN generic_start_main
29 #define LIBC_START_DISABLE_INLINE
30 #define LIBC_START_MAIN_AUXVEC_ARG
31 #define MAIN_AUXVEC_ARG
32 #define INIT_MAIN_ARGS
33 #include <csu/libc-start.c>
38 int (*main
) (int, char **, char **, void *);
39 int (*init
) (int, char **, char **, void *);
44 __libc_start_main (int argc
, char **argv
,
46 ElfW (auxv_t
) * auxvec
,
47 void (*rtld_fini
) (void),
48 struct startup_info
*stinfo
,
49 char **stack_on_entry
)
51 /* the PPC SVR4 ABI says that the top thing on the stack will
52 be a NULL pointer, so if not we assume that we're being called
53 as a statically-linked program by Linux... */
54 if (*stack_on_entry
!= NULL
)
57 /* ...in which case, we have argc as the top thing on the
58 stack, followed by argv (NULL-terminated), envp (likewise),
59 and the auxiliary vector. */
60 /* 32/64-bit agnostic load from stack */
61 argc
= *(long int *) stack_on_entry
;
62 argv
= stack_on_entry
+ 1;
64 #ifdef HAVE_AUX_VECTOR
68 auxvec
= (ElfW (auxv_t
) *)++ temp
;
73 for (ElfW (auxv_t
) * av
= auxvec
; av
->a_type
!= AT_NULL
; ++av
)
76 /* For the static case, we also need _dl_hwcap, _dl_hwcap2 and
77 _dl_platform, so we can call
78 __tcb_parse_hwcap_and_convert_at_platform (). */
81 _dl_hwcap
= (unsigned long int) av
->a_un
.a_val
;
84 _dl_hwcap2
= (unsigned long int) av
->a_un
.a_val
;
87 _dl_platform
= (void *) av
->a_un
.a_val
;
92 /* Initialize hwcap/hwcap2 and platform data so it can be copied to
93 the TCB later in __libc_setup_tls (). (static case only). */
95 __tcb_parse_hwcap_and_convert_at_platform ();
98 return generic_start_main (stinfo
->main
, argc
, argv
, auxvec
,
99 stinfo
->init
, stinfo
->fini
, rtld_fini
,