mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 23:10:06 +00:00
48ab1c2ff5
2001-07-25 Jakub Jelinek <jakub@redhat.com> * elf/Makefile (routines): Add dl-iteratephdr and dl-iteratephdr-static. (elide-routines.os): Add dl-iteratephdr-static. * elf/dl-iteratephdr.c: New file. * elf/link.h (struct dl_phdr_info): New definition. (dl_iterate_phdr): New prototype. * elf/Versions (dl_iterate_phdr): Add at GLIBC_2.2.4. * include/link.h (struct dl_phdr_info): New definition. (dl_iterate_phdr, __dl_iterate_phdr): New prototypes. * sysdeps/generic/dl-iteratephdr-static.c: New file. * sysdeps/unix/sysv/linux/ia64/dl-iteratephdr-static.c: New file. * hurd/hurdsig.c (_hurdsig_init): Fix incorrect initialization of pending signals.
116 lines
4.0 KiB
C
116 lines
4.0 KiB
C
/* Data structure for communication from the run-time dynamic linker for
|
|
loaded ELF shared objects.
|
|
Copyright (C) 1995-1999, 2000, 2001 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#ifndef _LINK_H
|
|
#define _LINK_H 1
|
|
|
|
#include <features.h>
|
|
#include <elf.h>
|
|
#include <dlfcn.h>
|
|
#include <sys/types.h>
|
|
|
|
/* We use this macro to refer to ELF types independent of the native wordsize.
|
|
`ElfW(TYPE)' is used in place of `Elf32_TYPE' or `Elf64_TYPE'. */
|
|
#define ElfW(type) _ElfW (Elf, __ELF_NATIVE_CLASS, type)
|
|
#define _ElfW(e,w,t) _ElfW_1 (e, w, _##t)
|
|
#define _ElfW_1(e,w,t) e##w##t
|
|
|
|
#include <bits/elfclass.h> /* Defines __ELF_NATIVE_CLASS. */
|
|
|
|
/* Rendezvous structure used by the run-time dynamic linker to communicate
|
|
details of shared object loading to the debugger. If the executable's
|
|
dynamic section has a DT_DEBUG element, the run-time linker sets that
|
|
element's value to the address where this structure can be found. */
|
|
|
|
struct r_debug
|
|
{
|
|
int r_version; /* Version number for this protocol. */
|
|
|
|
struct link_map *r_map; /* Head of the chain of loaded objects. */
|
|
|
|
/* This is the address of a function internal to the run-time linker,
|
|
that will always be called when the linker begins to map in a
|
|
library or unmap it, and again when the mapping change is complete.
|
|
The debugger can set a breakpoint at this address if it wants to
|
|
notice shared object mapping changes. */
|
|
ElfW(Addr) r_brk;
|
|
enum
|
|
{
|
|
/* This state value describes the mapping change taking place when
|
|
the `r_brk' address is called. */
|
|
RT_CONSISTENT, /* Mapping change is complete. */
|
|
RT_ADD, /* Beginning to add a new object. */
|
|
RT_DELETE /* Beginning to remove an object mapping. */
|
|
} r_state;
|
|
|
|
ElfW(Addr) r_ldbase; /* Base address the linker is loaded at. */
|
|
};
|
|
|
|
/* This is the instance of that structure used by the dynamic linker. */
|
|
extern struct r_debug _r_debug;
|
|
|
|
/* This symbol refers to the "dynamic structure" in the `.dynamic' section
|
|
of whatever module refers to `_DYNAMIC'. So, to find its own
|
|
`struct r_debug', a program could do:
|
|
for (dyn = _DYNAMIC; dyn->d_tag != DT_NULL; ++dyn)
|
|
if (dyn->d_tag == DT_DEBUG)
|
|
r_debug = (struct r_debug *) dyn->d_un.d_ptr;
|
|
*/
|
|
extern ElfW(Dyn) _DYNAMIC[];
|
|
|
|
/* Structure describing a loaded shared object. The `l_next' and `l_prev'
|
|
members form a chain of all the shared objects loaded at startup.
|
|
|
|
These data structures exist in space used by the run-time dynamic linker;
|
|
modifying them may have disastrous results. */
|
|
|
|
struct link_map
|
|
{
|
|
/* These first few members are part of the protocol with the debugger.
|
|
This is the same format used in SVR4. */
|
|
|
|
ElfW(Addr) l_addr; /* Base address shared object is loaded at. */
|
|
char *l_name; /* Absolute file name object was found in. */
|
|
ElfW(Dyn) *l_ld; /* Dynamic section of the shared object. */
|
|
struct link_map *l_next, *l_prev; /* Chain of loaded objects. */
|
|
};
|
|
|
|
#ifdef __USE_GNU
|
|
|
|
struct dl_phdr_info
|
|
{
|
|
ElfW(Addr) dlpi_addr;
|
|
const char *dlpi_name;
|
|
const ElfW(Phdr) *dlpi_phdr;
|
|
ElfW(Half) dlpi_phnum;
|
|
};
|
|
|
|
__BEGIN_DECLS
|
|
|
|
extern int dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
|
|
size_t size, void *data),
|
|
void *data) __THROW;
|
|
|
|
__END_DECLS
|
|
|
|
#endif
|
|
|
|
#endif /* link.h */
|