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      1 /* Arm specific symbolic name handling.
      2    Copyright (C) 2002-2009, 2014, 2015 Red Hat, Inc.
      3    This file is part of elfutils.
      4 
      5    This file is free software; you can redistribute it and/or modify
      6    it under the terms of either
      7 
      8      * the GNU Lesser General Public License as published by the Free
      9        Software Foundation; either version 3 of the License, or (at
     10        your option) any later version
     11 
     12    or
     13 
     14      * the GNU General Public License as published by the Free
     15        Software Foundation; either version 2 of the License, or (at
     16        your option) any later version
     17 
     18    or both in parallel, as here.
     19 
     20    elfutils is distributed in the hope that it will be useful, but
     21    WITHOUT ANY WARRANTY; without even the implied warranty of
     22    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     23    General Public License for more details.
     24 
     25    You should have received copies of the GNU General Public License and
     26    the GNU Lesser General Public License along with this program.  If
     27    not, see <http://www.gnu.org/licenses/>.  */
     28 
     29 #ifdef HAVE_CONFIG_H
     30 # include <config.h>
     31 #endif
     32 
     33 #include <elf.h>
     34 #include <stddef.h>
     35 
     36 #define BACKEND		arm_
     37 #include "libebl_CPU.h"
     38 
     39 
     40 const char *
     41 arm_segment_type_name (int segment, char *buf __attribute__ ((unused)),
     42 		       size_t len __attribute__ ((unused)))
     43 {
     44   switch (segment)
     45     {
     46     case PT_ARM_EXIDX:
     47       return "ARM_EXIDX";
     48     }
     49   return NULL;
     50 }
     51 
     52 /* Return symbolic representation of section type.  */
     53 const char *
     54 arm_section_type_name (int type,
     55 		       char *buf __attribute__ ((unused)),
     56 		       size_t len __attribute__ ((unused)))
     57 {
     58   switch (type)
     59     {
     60     case SHT_ARM_EXIDX:
     61       return "ARM_EXIDX";
     62     case SHT_ARM_PREEMPTMAP:
     63       return "ARM_PREEMPTMAP";
     64     case SHT_ARM_ATTRIBUTES:
     65       return "ARM_ATTRIBUTES";
     66     }
     67 
     68   return NULL;
     69 }
     70 
     71 /* Check whether machine flags are valid.  */
     72 bool
     73 arm_machine_flag_check (GElf_Word flags)
     74 {
     75   switch (flags & EF_ARM_EABIMASK)
     76     {
     77     case EF_ARM_EABI_UNKNOWN:
     78     case EF_ARM_EABI_VER1:
     79     case EF_ARM_EABI_VER2:
     80     case EF_ARM_EABI_VER3:
     81     case EF_ARM_EABI_VER4:
     82     case EF_ARM_EABI_VER5:
     83       break;
     84     default:
     85       return false;
     86     }
     87 
     88   return ((flags &~ (EF_ARM_EABIMASK
     89 		     | EF_ARM_RELEXEC
     90 		     | EF_ARM_HASENTRY
     91 		     | EF_ARM_INTERWORK
     92 		     | EF_ARM_APCS_26
     93 		     | EF_ARM_APCS_FLOAT
     94 		     | EF_ARM_PIC
     95 		     | EF_ARM_ALIGN8
     96 		     | EF_ARM_NEW_ABI
     97 		     | EF_ARM_OLD_ABI
     98 		     | EF_ARM_SOFT_FLOAT
     99 		     | EF_ARM_VFP_FLOAT
    100 		     | EF_ARM_MAVERICK_FLOAT
    101 		     | EF_ARM_SYMSARESORTED
    102 		     | EF_ARM_DYNSYMSUSESEGIDX
    103 		     | EF_ARM_MAPSYMSFIRST
    104 		     | EF_ARM_EABIMASK
    105 		     | EF_ARM_BE8
    106 		     | EF_ARM_LE8)) == 0);
    107 }
    108 
    109 /* Check for the simple reloc types.  */
    110 Elf_Type
    111 arm_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type)
    112 {
    113   switch (type)
    114     {
    115     case R_ARM_ABS32:
    116       return ELF_T_WORD;
    117     case R_ARM_ABS16:
    118       return ELF_T_HALF;
    119     case R_ARM_ABS8:
    120       return ELF_T_BYTE;
    121     default:
    122       return ELF_T_NUM;
    123     }
    124 }
    125 
    126 /* The SHT_ARM_EXIDX section type is a valid target for relocation.  */
    127 bool
    128 arm_check_reloc_target_type (Ebl *ebl __attribute__ ((unused)), Elf64_Word sh_type)
    129 {
    130   return sh_type == SHT_ARM_EXIDX;
    131 }
    132 
    133 const char *
    134 arm_symbol_type_name (int type,
    135 		      char *buf __attribute__ ((unused)),
    136 		      size_t len __attribute__ ((unused)))
    137 {
    138   switch (type)
    139     {
    140     case STT_ARM_TFUNC:
    141       return "ARM_TFUNC";
    142     }
    143   return NULL;
    144 }
    145