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75eff3fe90
This patch moves the AArch64 port to the main sysdeps hierarchy. The move is essentially: git mv ports/sysdeps/aarch64 sysdeps/aarch64 git mv ports/sysdeps/unix/sysv/linux/aarch64 sysdeps/unix/sysv/linux/aarch64 The README is updated and I've updated ChangeLog.aarch64 along the lines of the ARM move. The AArch64 build has been tested to confirm that there were no changes in objdump -dr output or the shared objects.
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/* Variable initialization. AArch64 version.
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Copyright (C) 2001-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <ldsodefs.h>
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#ifdef SHARED
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void
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_dl_var_init (void *array[])
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{
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/* It has to match "variables" below. */
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enum
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{
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DL_PAGESIZE = 0
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};
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GLRO(dl_pagesize) = *((size_t *) array[DL_PAGESIZE]);
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}
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#else
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static void *variables[] =
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{
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&GLRO(dl_pagesize)
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};
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static void
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_dl_unprotect_relro (struct link_map *l)
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{
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ElfW(Addr) start = ((l->l_addr + l->l_relro_addr)
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& ~(GLRO(dl_pagesize) - 1));
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ElfW(Addr) end = ((l->l_addr + l->l_relro_addr + l->l_relro_size)
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& ~(GLRO(dl_pagesize) - 1));
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if (start != end)
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__mprotect ((void *) start, end - start, PROT_READ | PROT_WRITE);
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}
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void
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_dl_static_init (struct link_map *l)
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{
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struct link_map *rtld_map = l;
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struct r_scope_elem **scope;
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const ElfW(Sym) *ref = NULL;
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lookup_t loadbase;
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void (*f) (void *[]);
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size_t i;
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loadbase = _dl_lookup_symbol_x ("_dl_var_init", l, &ref, l->l_local_scope,
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NULL, 0, 1, NULL);
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for (scope = l->l_local_scope; *scope != NULL; scope++)
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for (i = 0; i < (*scope)->r_nlist; i++)
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if ((*scope)->r_list[i] == loadbase)
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{
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rtld_map = (*scope)->r_list[i];
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break;
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}
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if (ref != NULL)
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{
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f = (void (*) (void *[])) DL_SYMBOL_ADDRESS (loadbase, ref);
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_dl_unprotect_relro (rtld_map);
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f (variables);
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_dl_protect_relro (rtld_map);
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}
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}
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#endif
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