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Diffstat (limited to 'libc/sysdeps/linux/frv/link.h')
| -rw-r--r-- | libc/sysdeps/linux/frv/link.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/frv/link.h b/libc/sysdeps/linux/frv/link.h new file mode 100644 index 000000000..121608f2b --- /dev/null +++ b/libc/sysdeps/linux/frv/link.h @@ -0,0 +1,127 @@ +/* Data structure for communication from the run-time dynamic linker for + loaded ELF shared objects. + Copyright (C) 1995-1999, 2000, 2001, 2004 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[]; + +#ifdef __FRV_FDPIC__ +# include <bits/elf-fdpic.h> +#endif + +/* 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. */ + +#ifdef __FRV_FDPIC__ + struct elf32_fdpic_loadaddr l_addr; +#else + ElfW(Addr) l_addr; /* Base address shared object is loaded at. */ +#endif + 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 + { +#ifdef __FRV_FDPIC__ + struct elf32_fdpic_loadaddr dlpi_addr; +#else + ElfW(Addr) dlpi_addr; +#endif + 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 */ |