diff options
Diffstat (limited to 'elf/link.h')
| -rw-r--r-- | elf/link.h | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/elf/link.h b/elf/link.h index ff3a85c847..200d40c9c6 100644 --- a/elf/link.h +++ b/elf/link.h @@ -34,14 +34,13 @@ #include <bits/elfclass.h> /* Defines __ELF_NATIVE_CLASS. */ #include <bits/link.h> -/* 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. */ +/* The legacy rendezvous structure used by the run-time dynamic linker to + communicate details of shared object loading to the debugger. */ struct r_debug { - int r_version; /* Version number for this protocol. */ + /* Version number for this protocol. It should be greater than 0. */ + int r_version; struct link_map *r_map; /* Head of the chain of loaded objects. */ @@ -63,16 +62,34 @@ struct r_debug ElfW(Addr) r_ldbase; /* Base address the linker is loaded at. */ }; -/* This is the instance of that structure used by the dynamic linker. */ +/* This is the symbol of that structure provided by the dynamic linker. */ extern struct r_debug _r_debug; +/* The extended 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_extended + { + struct r_debug base; + + /* The following field is added by r_version == 2. */ + + /* Link to the next r_debug_extended structure. Each r_debug_extended + structure represents a different namespace. The first + r_debug_extended structure is for the default namespace. */ + struct r_debug_extended *r_next; + }; + /* 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: + `struct r_debug_extended', 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; - */ + r_debug_extended = (struct r_debug_extended *) dyn->d_un.d_ptr; + */ extern ElfW(Dyn) _DYNAMIC[]; /* Structure describing a loaded shared object. The `l_next' and `l_prev' |