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[/] [openrisc/] [trunk/] [gnu-stable/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [linux/] [dl/] [do-rel.h] - Rev 859
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/* Do relocations for ELF dynamic linking. Copyright (C) 1995,96,97,98,99,2000,2001 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. */ /* This file may be included twice, to define both `elf_dynamic_do_rel' and `elf_dynamic_do_rela'. */ #include <machine/weakalias.h> #ifdef DO_RELA # define elf_dynamic_do_rel elf_dynamic_do_rela # define RELCOUNT_IDX VERSYMIDX (DT_RELACOUNT) # define Rel Rela # define elf_machine_rel elf_machine_rela # define elf_machine_rel_relative elf_machine_rela_relative #else # define RELCOUNT_IDX VERSYMIDX (DT_RELCOUNT) #endif #ifndef VERSYMIDX # define VERSYMIDX(sym) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGIDX (sym)) #endif /* Perform the relocations in MAP on the running program image as specified by RELTAG, SZTAG. If LAZY is nonzero, this is the first pass on PLT relocations; they should be set up to call _dl_runtime_resolve, rather than fully resolved now. */ static inline void elf_dynamic_do_rel (struct link_map *map, ElfW(Addr) reladdr, ElfW(Addr) relsize, int lazy, struct r_scope_elem *scope[]) { const ElfW(Rel) *r = (const void *) reladdr; const ElfW(Rel) *end = (const void *) (reladdr + relsize); ElfW(Addr) l_addr = map->l_addr; #ifndef RTLD_BOOTSTRAP /* We never bind lazily during ld.so bootstrap. Unfortunately gcc is not clever enough to see through all the function calls to realize that. */ if (lazy) { /* Doing lazy PLT relocations; they need very little info. */ for (; r < end; ++r) elf_machine_lazy_rel (map, l_addr, r); } else #endif { const ElfW(Sym) *const symtab = (const void *) D_PTR (map, l_info[DT_SYMTAB]); ElfW(Word) nrelative = (map->l_info[RELCOUNT_IDX] == NULL ? 0 : map->l_info[RELCOUNT_IDX]->d_un.d_val); const ElfW(Rel) *relative = r; r = MIN (r + nrelative, end); #ifndef RTLD_BOOTSTRAP /* This is defined in rtld.c, but nowhere in the static libc.a; make the reference weak so static programs can still link. This declaration cannot be done when compiling rtld.c (i.e. #ifdef RTLD_BOOTSTRAP) because rtld.c contains the common defn for _dl_rtld_map, which is incompatible with a weak decl in the same file. */ #pragma weak _dl_rtld_map if (map != &_dl_rtld_map) /* Already done in rtld itself. */ # ifndef DO_RELA /* Rela platforms get the offset from r_addend and this must be copied in the relocation address. Therefore we can skip the relative relocations only if this is for rel relocations. */ if (l_addr != 0) # endif #endif for (; relative < r; ++relative) elf_machine_rel_relative (l_addr, relative, (void *) (l_addr + relative->r_offset)); if (map->l_info[VERSYMIDX (DT_VERSYM)]) { const ElfW(Half) *const version = (const void *) D_PTR (map, l_info[VERSYMIDX (DT_VERSYM)]); for (; r < end; ++r) { ElfW(Half) ndx = version[ELFW(R_SYM) (r->r_info)]; elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)], &map->l_versions[ndx], (void *) (l_addr + r->r_offset), scope); } } else for (; r < end; ++r) elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)], NULL, (void *) (l_addr + r->r_offset), scope); } } #undef elf_dynamic_do_rel #undef Rel #undef elf_machine_rel #undef elf_machine_rel_relative #undef RELCOUNT_IDX
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