1 | /* |
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2 | * Taken from NetBSD and stripped of the relocations not needed on RTEMS. |
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3 | */ |
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4 | |
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5 | /* $NetBSD: mdreloc.c,v 1.31 2010/01/14 11:58:32 skrll Exp $ */ |
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6 | |
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7 | #include <sys/cdefs.h> |
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8 | |
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9 | #include <errno.h> |
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10 | #include <inttypes.h> |
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11 | #include <stdio.h> |
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12 | #include <sys/types.h> |
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13 | #include <sys/stat.h> |
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14 | |
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15 | #include <rtems/rtl/rtl.h> |
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16 | #include "rtl-elf.h" |
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17 | #include "rtl-error.h" |
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18 | #include <rtems/rtl/rtl-trace.h> |
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19 | #include "rtl-unwind.h" |
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20 | #include "rtl-unwind-dw2.h" |
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21 | |
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22 | uint32_t |
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23 | rtems_rtl_elf_section_flags (const rtems_rtl_obj* obj, |
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24 | const Elf_Shdr* shdr) |
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25 | { |
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26 | return 0; |
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27 | } |
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28 | |
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29 | uint32_t |
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30 | rtems_rtl_elf_arch_parse_section (const rtems_rtl_obj* obj, |
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31 | int section, |
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32 | const char* name, |
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33 | const Elf_Shdr* shdr, |
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34 | const uint32_t flags) |
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35 | { |
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36 | (void) obj; |
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37 | (void) section; |
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38 | (void) name; |
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39 | (void) shdr; |
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40 | return flags; |
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41 | } |
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42 | |
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43 | bool |
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44 | rtems_rtl_elf_arch_section_alloc (const rtems_rtl_obj* obj, |
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45 | rtems_rtl_obj_sect* sect) |
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46 | { |
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47 | (void) obj; |
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48 | (void) sect; |
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49 | return false; |
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50 | } |
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51 | |
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52 | bool |
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53 | rtems_rtl_elf_arch_section_free (const rtems_rtl_obj* obj, |
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54 | rtems_rtl_obj_sect* sect) |
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55 | { |
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56 | (void) obj; |
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57 | (void) sect; |
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58 | return false; |
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59 | } |
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60 | |
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61 | bool |
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62 | rtems_rtl_elf_rel_resolve_sym (Elf_Word type) |
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63 | { |
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64 | return true; |
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65 | } |
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66 | |
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67 | size_t |
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68 | rtems_rtl_elf_relocate_tramp_max_size (void) |
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69 | { |
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70 | /* |
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71 | * Disable by returning 0. |
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72 | */ |
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73 | return 0; |
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74 | } |
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75 | |
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76 | rtems_rtl_elf_rel_status |
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77 | rtems_rtl_elf_relocate_rela_tramp (rtems_rtl_obj* obj, |
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78 | const Elf_Rela* rela, |
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79 | const rtems_rtl_obj_sect* sect, |
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80 | const char* symname, |
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81 | const Elf_Byte syminfo, |
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82 | const Elf_Word symvalue) |
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83 | { |
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84 | (void) obj; |
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85 | (void) rela; |
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86 | (void) sect; |
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87 | (void) symname; |
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88 | (void) syminfo; |
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89 | (void) symvalue; |
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90 | rtems_rtl_set_error (EINVAL, "rela type record not supported"); |
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91 | return rtems_rtl_elf_rel_failure; |
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92 | } |
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93 | |
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94 | rtems_rtl_elf_rel_status |
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95 | rtems_rtl_elf_relocate_rela (rtems_rtl_obj* obj, |
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96 | const Elf_Rela* rel, |
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97 | const rtems_rtl_obj_sect* sect, |
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98 | const char* symname, |
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99 | const Elf_Byte syminfo, |
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100 | const Elf_Word symvalue) |
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101 | { |
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102 | (void) obj; |
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103 | (void) rel; |
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104 | (void) sect; |
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105 | (void) symname; |
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106 | (void) syminfo; |
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107 | (void) symvalue; |
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108 | rtems_rtl_set_error (EINVAL, "rela type record not supported"); |
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109 | return rtems_rtl_elf_rel_failure; |
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110 | } |
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111 | |
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112 | rtems_rtl_elf_rel_status |
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113 | rtems_rtl_elf_relocate_rel_tramp (rtems_rtl_obj* obj, |
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114 | const Elf_Rel* rel, |
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115 | const rtems_rtl_obj_sect* sect, |
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116 | const char* symname, |
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117 | const Elf_Byte syminfo, |
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118 | const Elf_Word symvalue) |
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119 | { |
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120 | (void) obj; |
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121 | (void) rel; |
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122 | (void) sect; |
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123 | (void) symname; |
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124 | (void) syminfo; |
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125 | (void) symvalue; |
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126 | return rtems_rtl_elf_rel_no_error; |
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127 | } |
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128 | |
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129 | rtems_rtl_elf_rel_status |
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130 | rtems_rtl_elf_relocate_rel (rtems_rtl_obj* obj, |
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131 | const Elf_Rel* rel, |
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132 | const rtems_rtl_obj_sect* sect, |
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133 | const char* symname, |
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134 | const Elf_Byte syminfo, |
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135 | const Elf_Word symvalue) |
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136 | { |
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137 | Elf_Addr target = 0; |
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138 | Elf_Addr* where; |
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139 | Elf_Addr tmp; |
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140 | |
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141 | where = (Elf_Addr *)(sect->base + rel->r_offset); |
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142 | |
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143 | switch (ELF_R_TYPE(rel->r_info)) { |
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144 | case R_TYPE(NONE): |
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145 | break; |
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146 | |
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147 | case R_TYPE(PC32): |
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148 | target = (Elf_Addr) symvalue; |
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149 | *where += target - (Elf_Addr)where; |
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150 | |
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151 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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152 | printf ("rtl: reloc PC32 in %s --> %p (%p @ %p) in %s\n", |
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153 | sect->name, (void*) symvalue, |
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154 | (void *)*where, where, rtems_rtl_obj_oname (obj)); |
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155 | break; |
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156 | |
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157 | case R_TYPE(GOT32): |
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158 | case R_TYPE(32): |
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159 | case R_TYPE(GLOB_DAT): |
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160 | target = (Elf_Addr) symvalue; |
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161 | |
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162 | tmp = target + *where; |
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163 | if (*where != tmp) |
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164 | *where = tmp; |
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165 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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166 | printf ("rtl: reloc 32/GLOB_DAT in %s --> %p @ %p in %s\n", |
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167 | sect->name, (void *)*where, where, |
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168 | rtems_rtl_obj_oname (obj)); |
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169 | break; |
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170 | |
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171 | case R_TYPE(RELATIVE): |
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172 | *where += (Elf_Addr)sect->base; |
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173 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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174 | printf ("rtl: reloc RELATIVE in %s --> %p @ %p\n", |
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175 | rtems_rtl_obj_oname (obj), (void *)*where, where); |
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176 | break; |
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177 | |
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178 | case R_TYPE(COPY): |
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179 | printf ("rtl: reloc COPY (please report)\n"); |
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180 | break; |
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181 | |
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182 | default: |
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183 | printf ("rtl: reloc unknown: sym = %i, type = %" PRIu32 ", offset = %p, " |
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184 | "contents = %p\n", |
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185 | (int) ELF_R_SYM(rel->r_info), (uint32_t) ELF_R_TYPE(rel->r_info), |
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186 | (void *)rel->r_offset, (void *)*where); |
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187 | rtems_rtl_set_error (EINVAL, |
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188 | "%s: Unsupported relocation type %" PRIu32 " " |
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189 | "in non-PLT relocations", |
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190 | sect->name, (uint32_t) ELF_R_TYPE(rel->r_info)); |
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191 | return rtems_rtl_elf_rel_failure; |
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192 | } |
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193 | |
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194 | return rtems_rtl_elf_rel_no_error; |
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195 | } |
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196 | |
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197 | bool |
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198 | rtems_rtl_elf_unwind_parse (const rtems_rtl_obj* obj, |
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199 | const char* name, |
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200 | uint32_t flags) |
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201 | { |
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202 | return rtems_rtl_elf_unwind_dw2_parse (obj, name, flags); |
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203 | } |
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204 | |
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205 | bool |
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206 | rtems_rtl_elf_unwind_register (rtems_rtl_obj* obj) |
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207 | { |
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208 | return rtems_rtl_elf_unwind_dw2_register (obj); |
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209 | } |
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210 | |
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211 | bool |
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212 | rtems_rtl_elf_unwind_deregister (rtems_rtl_obj* obj) |
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213 | { |
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214 | return rtems_rtl_elf_unwind_dw2_deregister (obj); |
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215 | } |
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