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96 lines
2.7 KiB
96 lines
2.7 KiB
4 months ago
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/* S/390-specific symbolic name handling.
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Copyright (C) 2005 Red Hat, Inc.
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This file is part of elfutils.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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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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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <elf.h>
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#include <stddef.h>
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#include <string.h>
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#define BACKEND s390_
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#include "libebl_CPU.h"
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/* Check for the simple reloc types. */
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Elf_Type
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s390_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type,
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int *addsub __attribute__ ((unused)))
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{
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switch (type)
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{
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case R_390_64:
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return ELF_T_SXWORD;
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case R_390_32:
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return ELF_T_SWORD;
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case R_390_16:
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return ELF_T_HALF;
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case R_390_8:
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return ELF_T_BYTE;
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default:
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return ELF_T_NUM;
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}
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}
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/* The _GLOBAL_OFFSET_TABLE_ symbol might point to the DT_PLTGOT,
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which is in the .got section, even if the symbol itself is
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associated with the is a .got.plt section.
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https://sourceware.org/ml/binutils/2018-07/msg00200.html */
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bool
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s390_check_special_symbol (Elf *elf, const GElf_Sym *sym,
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const char *name, const GElf_Shdr *destshdr)
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{
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if (name != NULL
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&& strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0)
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{
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size_t shstrndx;
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if (elf_getshdrstrndx (elf, &shstrndx) != 0)
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return false;
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const char *sname = elf_strptr (elf, shstrndx, destshdr->sh_name);
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if (sname != NULL
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&& (strcmp (sname, ".got") == 0 || strcmp (sname, ".got.plt") == 0))
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{
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Elf_Scn *scn = NULL;
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while ((scn = elf_nextscn (elf, scn)) != NULL)
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{
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GElf_Shdr shdr_mem;
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GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
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if (shdr != NULL)
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{
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sname = elf_strptr (elf, shstrndx, shdr->sh_name);
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if (sname != NULL && strcmp (sname, ".got") == 0)
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return (sym->st_value >= shdr->sh_addr
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&& sym->st_value < shdr->sh_addr + shdr->sh_size);
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}
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}
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}
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}
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return false;
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}
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