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/*
* libpulp - User-space Livepatching Library
*
* Copyright (C) 2022 SUSE Software Solutions GmbH
*
* This file is part of libpulp.
*
* libpulp 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.
*
* libpulp 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 General Public License
* along with libpulp. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _LD_RTLD
#define _LD_RTLD
#include <dlfcn.h>
#include <elf.h>
#include <link.h>
#include <pthread.h>
#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 35
struct r_debug_extended
{
struct r_debug base;
struct r_debug_extended *r_next;
};
#endif
typedef struct
{
pthread_mutex_t mutex;
} __rtld_lock_recursive_t;
#define __rtld_lock_define_recursive(CLASS, NAME) \
CLASS __rtld_lock_recursive_t NAME;
#define DL_NNS 16
#define EXTERN
/* clang-format off */
/**
* Incomplete declaration of rtld_global, taken out from glibc's
* sysdeps/generic/ldsodefs.h. We just need the first part of it to reach the
* '_dl_load_lock'.
*
* Extracted from glibc 2.31
*
*/
struct rtld_global__2_31
{
struct
{
struct link_map *_ns_loaded;
unsigned int _ns_nloaded;
struct r_scope_elem *_ns_main_searchlist;
unsigned int _ns_global_scope_alloc;
unsigned int _ns_global_scope_pending_adds;
struct
{
__rtld_lock_define_recursive(, lock) struct
{
uint32_t hashval;
const char *name;
const ElfW(Sym) * sym;
const struct link_map *map;
} * entries;
size_t size;
size_t n_elements;
void (*free)(void *);
} _ns_unique_sym_table;
struct r_debug _ns_debug;
} _dl_ns[DL_NNS];
size_t _dl_nns;
__rtld_lock_define_recursive(EXTERN, _dl_load_lock)
__rtld_lock_define_recursive(EXTERN, _dl_load_write_lock)
unsigned long long _dl_load_adds;
};
/**
* Incomplete declaration of rtld_global, taken out from glibc's
* sysdeps/generic/ldsodefs.h. We just need the first part of it to reach the
* '_dl_load_lock'.
*
* Extracted from glibc 2.35.
*
*/
struct rtld_global__2_35
{
struct
{
struct link_map *_ns_loaded;
unsigned int _ns_nloaded;
struct r_scope_elem *_ns_main_searchlist;
unsigned int _ns_global_scope_alloc;
unsigned int _ns_global_scope_pending_adds;
struct link_map *libc_map;
struct
{
__rtld_lock_define_recursive (, lock)
struct
{
uint32_t hashval;
const char *name;
const ElfW(Sym) *sym;
const struct link_map *map;
} *entries;
size_t size;
size_t n_elements;
void (*free) (void *);
} _ns_unique_sym_table;
struct r_debug_extended _ns_debug;
} _dl_ns[DL_NNS];
size_t _dl_nns;
__rtld_lock_define_recursive (EXTERN, _dl_load_lock)
__rtld_lock_define_recursive (EXTERN, _dl_load_write_lock)
__rtld_lock_define_recursive (EXTERN, _dl_load_tls_lock)
};
/**
* Incomplete declaration of rtld_global, taken out from glibc's
* sysdeps/generic/ldsodefs.h. We just need the first part of it to reach the
* '_dl_load_lock'.
*
* Extracted from glibc 2.42.
*
*/
struct rtld_global__2_42
{
struct
{
struct link_map *_ns_loaded;
unsigned int _ns_nloaded;
struct r_scope_elem *_ns_main_searchlist;
unsigned int _ns_global_scope_alloc;
unsigned int _ns_global_scope_pending_adds;
struct link_map *libc_map;
struct
{
__rtld_lock_define_recursive (, lock)
struct
{
uint32_t hashval;
const char *name;
const ElfW(Sym) *sym;
const struct link_map *map;
} *entries;
size_t size;
size_t n_elements;
void (*free) (void *);
} _ns_unique_sym_table;
} _dl_ns[DL_NNS];
size_t _dl_nns;
__rtld_lock_define_recursive (EXTERN, _dl_load_lock)
__rtld_lock_define_recursive (EXTERN, _dl_load_write_lock)
__rtld_lock_define_recursive (EXTERN, _dl_load_tls_lock)
};
/* clang-format on */
#undef DL_NNS
#undef EXTERN
#endif
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