Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame^] | 1 | /* PPC specific symbolic name handling. |
| 2 | Copyright (C) 2004, 2005 Red Hat, Inc. |
| 3 | Written by Ulrich Drepper <drepper@redhat.com>, 2004. |
| 4 | |
| 5 | This program is Open Source software; you can redistribute it and/or |
| 6 | modify it under the terms of the Open Software License version 1.0 as |
| 7 | published by the Open Source Initiative. |
| 8 | |
| 9 | You should have received a copy of the Open Software License along |
| 10 | with this program; if not, you may obtain a copy of the Open Software |
| 11 | License version 1.0 from http://www.opensource.org/licenses/osl.php or |
| 12 | by writing the Open Source Initiative c/o Lawrence Rosen, Esq., |
| 13 | 3001 King Ranch Road, Ukiah, CA 95482. */ |
| 14 | |
| 15 | #ifdef HAVE_CONFIG_H |
| 16 | # include <config.h> |
| 17 | #endif |
| 18 | |
| 19 | #include <assert.h> |
| 20 | #include <elf.h> |
| 21 | #include <stddef.h> |
| 22 | |
| 23 | #include <libebl_ppc.h> |
| 24 | |
| 25 | |
| 26 | /* Return of the backend. */ |
| 27 | const char * |
| 28 | ppc_backend_name (void) |
| 29 | { |
| 30 | return "ppc"; |
| 31 | } |
| 32 | |
| 33 | |
| 34 | /* Relocation mapping table. */ |
| 35 | static struct |
| 36 | { |
| 37 | const char *name; |
| 38 | enum { both = 0, rel = 1, exec = 2 } appear; |
| 39 | } reloc_map_table[] = |
| 40 | { |
| 41 | // XXX Check all the appear values. |
| 42 | [R_PPC_NONE] = { "R_PPC_NONE", both }, |
| 43 | [R_PPC_ADDR32] = { "R_PPC_ADDR32", both }, |
| 44 | [R_PPC_ADDR24] = { "R_PPC_ADDR24", both }, |
| 45 | [R_PPC_ADDR16] = { "R_PPC_ADDR16", both }, |
| 46 | [R_PPC_ADDR16_LO] = { "R_PPC_ADDR16_LO", both }, |
| 47 | [R_PPC_ADDR16_HI] = { "R_PPC_ADDR16_HI", both }, |
| 48 | [R_PPC_ADDR16_HA] = { "R_PPC_ADDR16_HA", both }, |
| 49 | [R_PPC_ADDR14] = { "R_PPC_ADDR14", exec }, |
| 50 | [R_PPC_ADDR14_BRTAKEN] = { "R_PPC_ADDR14_BRTAKEN", exec }, |
| 51 | [R_PPC_ADDR14_BRNTAKEN] = { "R_PPC_ADDR14_BRNTAKEN", exec }, |
| 52 | [R_PPC_REL24] = { "R_PPC_REL24", both }, |
| 53 | [R_PPC_REL14] = { "R_PPC_REL14", both }, |
| 54 | [R_PPC_REL14_BRTAKEN] = { "R_PPC_REL14_BRTAKEN", exec }, |
| 55 | [R_PPC_REL14_BRNTAKEN] = { "R_PPC_REL14_BRNTAKEN", exec }, |
| 56 | [R_PPC_GOT16] = { "R_PPC_GOT16", rel }, |
| 57 | [R_PPC_GOT16_LO] = { "R_PPC_GOT16_LO", rel }, |
| 58 | [R_PPC_GOT16_HI] = { "R_PPC_GOT16_HI", rel }, |
| 59 | [R_PPC_GOT16_HA] = { "R_PPC_GOT16_HA", rel }, |
| 60 | [R_PPC_PLTREL24] = { "R_PPC_PLTREL24", rel }, |
| 61 | [R_PPC_COPY] = { "R_PPC_COPY", exec }, |
| 62 | [R_PPC_GLOB_DAT] = { "R_PPC_GLOB_DAT", exec }, |
| 63 | [R_PPC_JMP_SLOT] = { "R_PPC_JMP_SLOT", exec }, |
| 64 | [R_PPC_RELATIVE] = { "R_PPC_RELATIVE", exec }, |
| 65 | [R_PPC_LOCAL24PC] = { "R_PPC_LOCAL24PC", rel }, |
| 66 | [R_PPC_UADDR32] = { "R_PPC_UADDR32", exec }, |
| 67 | [R_PPC_UADDR16] = { "R_PPC_UADDR16", exec }, |
| 68 | [R_PPC_REL32] = { "R_PPC_REL32", exec }, |
| 69 | [R_PPC_PLT32] = { "R_PPC_PLT32", exec }, |
| 70 | [R_PPC_PLTREL32] = { "R_PPC_PLTREL32", both }, |
| 71 | [R_PPC_PLT16_LO] = { "R_PPC_PLT16_LO", both }, |
| 72 | [R_PPC_PLT16_HI] = { "R_PPC_PLT16_HI", both }, |
| 73 | [R_PPC_PLT16_HA] = { "R_PPC_PLT16_HA", both }, |
| 74 | [R_PPC_SDAREL16] = { "R_PPC_SDAREL16", both }, |
| 75 | [R_PPC_SECTOFF] = { "R_PPC_SECTOFF", both }, |
| 76 | [R_PPC_SECTOFF_LO] = { "R_PPC_SECTOFF_LO", both }, |
| 77 | [R_PPC_SECTOFF_HI] = { "R_PPC_SECTOFF_HI", both }, |
| 78 | [R_PPC_SECTOFF_HA] = { "R_PPC_SECTOFF_HA", both }, |
| 79 | [R_PPC_TLS] = { "R_PPC_TLS", both }, |
| 80 | [R_PPC_DTPMOD32] = { "R_PPC_DTPMOD32", exec }, |
| 81 | [R_PPC_TPREL16] = { "R_PPC_TPREL16", rel }, |
| 82 | [R_PPC_TPREL16_LO] = { "R_PPC_TPREL16_LO", rel }, |
| 83 | [R_PPC_TPREL16_HI] = { "R_PPC_TPREL16_HI", rel }, |
| 84 | [R_PPC_TPREL16_HA] = { "R_PPC_TPREL16_HA", rel }, |
| 85 | [R_PPC_TPREL32] = { "R_PPC_TPREL32", exec }, |
| 86 | [R_PPC_DTPREL16] = { "R_PPC_DTPREL16", rel }, |
| 87 | [R_PPC_DTPREL16_LO] = { "R_PPC_DTPREL16_LO", rel }, |
| 88 | [R_PPC_DTPREL16_HI] = { "R_PPC_DTPREL16_HI", rel }, |
| 89 | [R_PPC_DTPREL16_HA] = { "R_PPC_DTPREL16_HA", rel }, |
| 90 | [R_PPC_DTPREL32] = { "R_PPC_DTPREL32", exec }, |
| 91 | [R_PPC_GOT_TLSGD16] = { "R_PPC_GOT_TLSGD16", exec }, |
| 92 | [R_PPC_GOT_TLSGD16_LO] = { "R_PPC_GOT_TLSGD16_LO", exec }, |
| 93 | [R_PPC_GOT_TLSGD16_HI] = { "R_PPC_GOT_TLSGD16_HI", exec }, |
| 94 | [R_PPC_GOT_TLSGD16_HA] = { "R_PPC_GOT_TLSGD16_HA", exec }, |
| 95 | [R_PPC_GOT_TLSLD16] = { "R_PPC_GOT_TLSLD16", exec }, |
| 96 | [R_PPC_GOT_TLSLD16_LO] = { "R_PPC_GOT_TLSLD16_LO", exec }, |
| 97 | [R_PPC_GOT_TLSLD16_HI] = { "R_PPC_GOT_TLSLD16_HI", exec }, |
| 98 | [R_PPC_GOT_TLSLD16_HA] = { "R_PPC_GOT_TLSLD16_HA", exec }, |
| 99 | [R_PPC_GOT_TPREL16] = { "R_PPC_GOT_TPREL16", exec }, |
| 100 | [R_PPC_GOT_TPREL16_LO] = { "R_PPC_GOT_TPREL16_LO", exec }, |
| 101 | [R_PPC_GOT_TPREL16_HI] = { "R_PPC_GOT_TPREL16_HI", exec }, |
| 102 | [R_PPC_GOT_TPREL16_HA] = { "R_PPC_GOT_TPREL16_HA", exec }, |
| 103 | [R_PPC_GOT_DTPREL16] = { "R_PPC_GOT_DTPREL16", exec }, |
| 104 | [R_PPC_GOT_DTPREL16_LO] = { "R_PPC_GOT_DTPREL16_LO", exec }, |
| 105 | [R_PPC_GOT_DTPREL16_HI] = { "R_PPC_GOT_DTPREL16_HI", exec }, |
| 106 | [R_PPC_GOT_DTPREL16_HA] = { "R_PPC_GOT_DTPREL16_HA", exec } |
| 107 | }; |
| 108 | |
| 109 | |
| 110 | /* Determine relocation type string for PPC. */ |
| 111 | const char * |
| 112 | ppc_reloc_type_name (int type, char *buf __attribute__ ((unused)), |
| 113 | size_t len __attribute__ ((unused))) |
| 114 | { |
| 115 | if (type < 0 || type >= R_PPC_NUM) |
| 116 | return NULL; |
| 117 | |
| 118 | return reloc_map_table[type].name; |
| 119 | } |
| 120 | |
| 121 | |
| 122 | /* Check for correct relocation type. */ |
| 123 | bool |
| 124 | ppc_reloc_type_check (int type) |
| 125 | { |
| 126 | return (type >= R_PPC_NONE && type < R_PPC_NUM |
| 127 | && reloc_map_table[type].name != NULL) ? true : false; |
| 128 | } |
| 129 | |
| 130 | |
| 131 | /* Check for correct relocation type use. */ |
| 132 | bool |
| 133 | ppc_reloc_valid_use (Elf *elf, int type) |
| 134 | { |
| 135 | if (type < R_PPC_NONE || type >= R_PPC_NUM |
| 136 | || reloc_map_table[type].name == NULL) |
| 137 | return false; |
| 138 | |
| 139 | Elf32_Ehdr *ehdr = elf32_getehdr (elf); |
| 140 | assert (ehdr != NULL); |
| 141 | |
| 142 | if (reloc_map_table[type].appear == rel) |
| 143 | return ehdr->e_type == ET_REL; |
| 144 | |
| 145 | if (reloc_map_table[type].appear == exec) |
| 146 | return ehdr->e_type != ET_REL; |
| 147 | |
| 148 | assert (reloc_map_table[type].appear == both); |
| 149 | return true; |
| 150 | } |
| 151 | |
| 152 | |
| 153 | /* Check for the simple reloc types. */ |
| 154 | Elf_Type |
| 155 | ppc_reloc_simple_type (Elf *elf __attribute__ ((unused)), int type) |
| 156 | { |
| 157 | switch (type) |
| 158 | { |
| 159 | case R_PPC_ADDR32: |
| 160 | case R_PPC_UADDR32: |
| 161 | return ELF_T_WORD; |
| 162 | case R_PPC_UADDR16: |
| 163 | return ELF_T_HALF; |
| 164 | default: |
| 165 | return ELF_T_NUM; |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | /* Check whether given relocation is a copy relocation. */ |
| 170 | bool |
| 171 | ppc_copy_reloc_p (int reloc) |
| 172 | { |
| 173 | return reloc == R_PPC_COPY; |
| 174 | } |