mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 13:30:06 +00:00
1bd888d0b7
1. Add GNU_PROPERTY_1_NEEDED: #define GNU_PROPERTY_1_NEEDED GNU_PROPERTY_UINT32_OR_LO to indicate the needed properties by the object file. 2. Add GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS: #define GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS (1U << 0) to indicate that the object file requires canonical function pointers and cannot be used with copy relocation. 3. Scan GNU_PROPERTY_1_NEEDED property and store it in l_1_needed. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/* Support for GNU properties. Generic version.
|
|
Copyright (C) 2018-2021 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
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _DL_PROP_H
|
|
#define _DL_PROP_H
|
|
|
|
/* The following functions are used by the dynamic loader and the
|
|
dlopen machinery to process PT_NOTE and PT_GNU_PROPERTY entries in
|
|
the binary or shared object. The notes can be used to change the
|
|
behaviour of the loader, and as such offer a flexible mechanism
|
|
for hooking in various checks related to ABI tags or implementing
|
|
"flag day" ABI transitions. */
|
|
|
|
static inline void __attribute__ ((always_inline))
|
|
_rtld_main_check (struct link_map *m, const char *program)
|
|
{
|
|
}
|
|
|
|
static inline void __attribute__ ((always_inline))
|
|
_dl_open_check (struct link_map *m)
|
|
{
|
|
}
|
|
|
|
static inline void __attribute__ ((always_inline))
|
|
_dl_process_pt_note (struct link_map *l, int fd, const ElfW(Phdr) *ph)
|
|
{
|
|
}
|
|
|
|
/* Called for each property in the NT_GNU_PROPERTY_TYPE_0 note of L,
|
|
processing of the properties continues until this returns 0. */
|
|
static inline int __attribute__ ((always_inline))
|
|
_dl_process_gnu_property (struct link_map *l, int fd, uint32_t type,
|
|
uint32_t datasz, void *data)
|
|
{
|
|
/* Continue until GNU_PROPERTY_1_NEEDED is found. */
|
|
if (type == GNU_PROPERTY_1_NEEDED)
|
|
{
|
|
if (datasz == 4)
|
|
l->l_1_needed = *(unsigned int *) data;
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
#endif /* _DL_PROP_H */
|