diff options
Diffstat (limited to 'elf/dl-lookup.c')
| -rw-r--r-- | elf/dl-lookup.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c index 11cb44b451..f577759a9d 100644 --- a/elf/dl-lookup.c +++ b/elf/dl-lookup.c @@ -1,5 +1,5 @@ /* Look up a symbol in the loaded objects. - Copyright (C) 1995-2015 Free Software Foundation, Inc. + Copyright (C) 1995-2016 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 @@ -25,7 +25,7 @@ #include <dl-hash.h> #include <dl-machine.h> #include <sysdep-cancel.h> -#include <bits/libc-lock.h> +#include <libc-lock.h> #include <tls.h> #include <atomic.h> @@ -1016,6 +1016,18 @@ _dl_debug_bindings (const char *undef_name, struct link_map *undef_map, #ifdef SHARED if (GLRO(dl_debug_mask) & DL_DEBUG_PRELINK) { +/* ELF_RTYPE_CLASS_XXX must match RTYPE_CLASS_XXX used by prelink with + LD_TRACE_PRELINKING. */ +#define RTYPE_CLASS_VALID 8 +#define RTYPE_CLASS_PLT (8|1) +#define RTYPE_CLASS_COPY (8|2) +#define RTYPE_CLASS_TLS (8|4) +#if ELF_RTYPE_CLASS_PLT != 0 && ELF_RTYPE_CLASS_PLT != 1 +# error ELF_RTYPE_CLASS_PLT must be 0 or 1! +#endif +#if ELF_RTYPE_CLASS_COPY != 0 && ELF_RTYPE_CLASS_COPY != 2 +# error ELF_RTYPE_CLASS_COPY must be 0 or 2! +#endif int conflict = 0; struct sym_val val = { NULL, NULL }; @@ -1071,12 +1083,17 @@ _dl_debug_bindings (const char *undef_name, struct link_map *undef_map, if (value->s) { + /* Keep only ELF_RTYPE_CLASS_PLT and ELF_RTYPE_CLASS_COPY + bits since since prelink only uses them. */ + type_class &= ELF_RTYPE_CLASS_PLT | ELF_RTYPE_CLASS_COPY; if (__glibc_unlikely (ELFW(ST_TYPE) (value->s->st_info) == STT_TLS)) - type_class = 4; + /* Clear the RTYPE_CLASS_VALID bit in RTYPE_CLASS_TLS. */ + type_class = RTYPE_CLASS_TLS & ~RTYPE_CLASS_VALID; else if (__glibc_unlikely (ELFW(ST_TYPE) (value->s->st_info) == STT_GNU_IFUNC)) - type_class |= 8; + /* Set the RTYPE_CLASS_VALID bit. */ + type_class |= RTYPE_CLASS_VALID; } if (conflict |