1 | #include <sys/cdefs.h> |
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2 | |
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3 | #include <errno.h> |
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4 | #include <stdio.h> |
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5 | #include <sys/types.h> |
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6 | #include <sys/stat.h> |
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7 | |
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8 | #include <rtems/rtl/rtl.h> |
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9 | #include "rtl-elf.h" |
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10 | #include "rtl-error.h" |
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11 | #include <rtems/rtl/rtl-trace.h> |
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12 | #include "rtl-unwind.h" |
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13 | #include "rtl-unwind-dw2.h" |
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14 | |
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15 | uint32_t |
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16 | rtems_rtl_elf_section_flags (const rtems_rtl_obj* obj, |
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17 | const Elf_Shdr* shdr) |
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18 | { |
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19 | return 0; |
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20 | } |
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21 | |
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22 | bool |
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23 | rtems_rtl_elf_rel_resolve_sym (Elf_Word type) |
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24 | { |
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25 | return true; |
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26 | } |
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27 | |
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28 | size_t |
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29 | rtems_rtl_elf_relocate_tramp_max_size (void) |
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30 | { |
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31 | /* |
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32 | * Disable by returning 0. |
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33 | */ |
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34 | return 0; |
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35 | } |
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36 | |
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37 | bool |
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38 | rtems_rtl_elf_relocate_rela_tramp (rtems_rtl_obj* obj, |
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39 | const Elf_Rela* rela, |
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40 | const rtems_rtl_obj_sect* sect, |
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41 | const char* symname, |
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42 | const Elf_Byte syminfo, |
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43 | const Elf_Word symvalue) |
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44 | { |
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45 | (void) obj; |
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46 | (void) rela; |
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47 | (void) sect; |
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48 | (void) symname; |
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49 | (void) syminfo; |
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50 | (void) symvalue; |
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51 | return true; |
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52 | } |
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53 | |
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54 | bool |
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55 | rtems_rtl_elf_relocate_rela (rtems_rtl_obj* obj, |
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56 | const Elf_Rela* rela, |
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57 | const rtems_rtl_obj_sect* sect, |
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58 | const char* symname, |
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59 | const Elf_Byte syminfo, |
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60 | const Elf_Word symvalue) |
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61 | { |
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62 | Elf_Addr *where; |
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63 | Elf_Word tmp; |
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64 | |
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65 | where = (Elf_Addr *)(sect->base + rela->r_offset); |
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66 | |
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67 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) { |
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68 | printf("rela relocation type is %ld\n", ELF_R_TYPE(rela->r_info)); |
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69 | printf("relocated address 0x%08lx\n", (Elf_Addr)where); |
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70 | } |
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71 | |
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72 | tmp = symvalue; |
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73 | switch (ELF_R_TYPE(rela->r_info)) { |
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74 | case R_TYPE(NONE): |
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75 | break; |
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76 | |
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77 | case R_TYPE(DIR16): |
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78 | *(uint16_t *)where += symvalue + rela->r_addend; |
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79 | break; |
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80 | |
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81 | case R_TYPE(DIR32): |
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82 | case R_TYPE(DIR32A16): |
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83 | *where += symvalue + rela->r_addend; |
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84 | break; |
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85 | |
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86 | case R_TYPE(DIR24A8): |
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87 | if (ELF32_R_SYM(rela->r_info)) |
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88 | *where += symvalue + rela->r_addend; |
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89 | break; |
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90 | |
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91 | case R_TYPE(DIR24R8): |
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92 | where = (uint32_t *)((uint32_t)where - 1); |
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93 | *where = (*where & 0xff000000) | ((*where & 0xffffff) + symvalue + rela->r_addend); |
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94 | break; |
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95 | |
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96 | case R_TYPE(PCREL8): |
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97 | /* bcc instruction */ |
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98 | tmp = symvalue + rela->r_addend - (Elf_Addr)where - 1; |
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99 | if (((Elf32_Sword)tmp > 0x7f) || ((Elf32_Sword)tmp < -(Elf32_Sword)0x80)){ |
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100 | printf("PCREL8 overflow\n"); |
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101 | return false; |
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102 | } else { |
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103 | *(uint8_t *)where = tmp; |
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104 | } |
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105 | break; |
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106 | |
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107 | case R_TYPE(PCREL16): |
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108 | /* bcc instruction */ |
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109 | tmp = symvalue + rela->r_addend - (Elf_Addr)where - 2; |
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110 | if (((Elf32_Sword)tmp > 0x7fff) || ((Elf32_Sword)tmp < -(Elf32_Sword)0x8000)){ |
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111 | printf("PCREL16 overflow\n"); |
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112 | return false; |
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113 | } else { |
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114 | *(uint16_t *)where = tmp; |
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115 | } |
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116 | break; |
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117 | |
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118 | default: |
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119 | rtems_rtl_set_error (EINVAL, "rela type record not supported"); |
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120 | printf("Unsupported reloc types\n"); |
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121 | return false; |
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122 | } |
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123 | return true; |
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124 | } |
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125 | |
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126 | bool |
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127 | rtems_rtl_elf_relocate_rel_tramp (rtems_rtl_obj* obj, |
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128 | const Elf_Rel* rel, |
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129 | const rtems_rtl_obj_sect* sect, |
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130 | const char* symname, |
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131 | const Elf_Byte syminfo, |
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132 | const Elf_Word symvalue) |
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133 | { |
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134 | (void) obj; |
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135 | (void) rel; |
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136 | (void) sect; |
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137 | (void) symname; |
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138 | (void) syminfo; |
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139 | (void) symvalue; |
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140 | rtems_rtl_set_error (EINVAL, "rel type record not supported"); |
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141 | return false; |
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142 | } |
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143 | |
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144 | bool |
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145 | rtems_rtl_elf_relocate_rel (rtems_rtl_obj* obj, |
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146 | const Elf_Rel* rel, |
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147 | const rtems_rtl_obj_sect* sect, |
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148 | const char* symname, |
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149 | const Elf_Byte syminfo, |
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150 | const Elf_Word symvalue) |
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151 | { |
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152 | (void) obj; |
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153 | (void) rel; |
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154 | (void) sect; |
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155 | (void) symname; |
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156 | (void) syminfo; |
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157 | (void) symvalue; |
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158 | rtems_rtl_set_error (EINVAL, "rel type record not supported"); |
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159 | return false; |
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160 | } |
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161 | |
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162 | bool |
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163 | rtems_rtl_elf_unwind_parse (const rtems_rtl_obj* obj, |
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164 | const char* name, |
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165 | uint32_t flags) |
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166 | { |
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167 | return rtems_rtl_elf_unwind_dw2_parse (obj, name, flags); |
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168 | } |
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169 | |
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170 | bool |
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171 | rtems_rtl_elf_unwind_register (rtems_rtl_obj* obj) |
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172 | { |
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173 | return rtems_rtl_elf_unwind_dw2_register (obj); |
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174 | } |
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175 | |
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176 | bool |
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177 | rtems_rtl_elf_unwind_deregister (rtems_rtl_obj* obj) |
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178 | { |
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179 | return rtems_rtl_elf_unwind_dw2_deregister (obj); |
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180 | } |
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