diff options
Diffstat (limited to 'include/link.h')
| -rw-r--r-- | include/link.h | 39 |
1 files changed, 28 insertions, 11 deletions
diff --git a/include/link.h b/include/link.h index 5924594548..2acc836380 100644 --- a/include/link.h +++ b/include/link.h @@ -1,6 +1,6 @@ /* Data structure for communication from the run-time dynamic linker for loaded ELF shared objects. - Copyright (C) 1995-2018 Free Software Foundation, Inc. + Copyright (C) 1995-2019 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 @@ -15,7 +15,7 @@ You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ + <https://www.gnu.org/licenses/>. */ #ifndef _PRIVATE_LINK_H #define _PRIVATE_LINK_H 1 @@ -79,7 +79,6 @@ struct r_search_path_struct int malloced; }; - /* Structure describing a loaded shared object. The `l_next' and `l_prev' members form a chain of all the shared objects loaded at startup. @@ -203,6 +202,18 @@ struct link_map freed, ie. not allocated with the dummy malloc in ld.so. */ + /* NODELETE status of the map. Only valid for maps of type + lt_loaded. Lazy binding sets l_nodelete_active directly, + potentially from signal handlers. Initial loading of an + DF_1_NODELETE object set l_nodelete_pending. Relocation may + set l_nodelete_pending as well. l_nodelete_pending maps are + promoted to l_nodelete_active status in the final stages of + dlopen, prior to calling ELF constructors. dlclose only + refuses to unload l_nodelete_active maps, the pending status is + ignored. */ + bool l_nodelete_active; + bool l_nodelete_pending; + #include <link_map.h> /* Collected information about own RPATH directories. */ @@ -216,6 +227,10 @@ struct link_map unsigned int boundndx; uint32_t enterexit; unsigned int flags; + /* CONCURRENCY NOTE: This is used to guard the concurrent initialization + of the relocation result across multiple threads. See the more + detailed notes in elf/dl-runtime.c. */ + unsigned int init; } *l_reloc_result; /* Pointer to the version information if available. */ @@ -321,16 +336,18 @@ struct link_map size_t l_relro_size; unsigned long long int l_serial; - - /* Audit information. This array apparent must be the last in the - structure. Never add something after it. */ - struct auditstate - { - uintptr_t cookie; - unsigned int bindflags; - } l_audit[0]; }; +/* Information used by audit modules. For most link maps, this data + immediate follows the link map in memory. For the dynamic linker, + it is allocated separately. See link_map_audit_state in + <ldsodefs.h>. */ +struct auditstate +{ + uintptr_t cookie; + unsigned int bindflags; +}; + #if __ELF_NATIVE_CLASS == 32 # define symbind symbind32 |