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 <stdio.h> |
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11 | #include <sys/types.h> |
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12 | #include <sys/stat.h> |
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13 | |
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14 | #include <rtems/rtl/rtl.h> |
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15 | #include "rtl-elf.h" |
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16 | #include "rtl-error.h" |
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17 | #include <rtems/rtl/rtl-trace.h> |
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18 | #include "rtl-unwind.h" |
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19 | #include "rtl-unwind-dw2.h" |
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20 | |
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21 | uint32_t |
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22 | rtems_rtl_elf_section_flags (const rtems_rtl_obj* obj, |
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23 | const Elf_Shdr* shdr) |
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24 | { |
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25 | return 0; |
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26 | } |
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27 | |
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28 | bool |
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29 | rtems_rtl_elf_rel_resolve_sym (Elf_Word type) |
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30 | { |
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31 | return true; |
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32 | } |
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33 | |
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34 | bool |
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35 | rtems_rtl_elf_relocate_rela (const rtems_rtl_obj* obj, |
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36 | const Elf_Rela* rel, |
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37 | const rtems_rtl_obj_sect* sect, |
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38 | const char* symname, |
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39 | const Elf_Byte syminfo, |
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40 | const Elf_Word symvalue) |
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41 | { |
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42 | rtems_rtl_set_error (EINVAL, "rela type record not supported"); |
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43 | return false; |
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44 | } |
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45 | |
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46 | bool |
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47 | rtems_rtl_elf_relocate_rel (const rtems_rtl_obj* obj, |
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48 | const Elf_Rel* rel, |
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49 | const rtems_rtl_obj_sect* sect, |
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50 | const char* symname, |
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51 | const Elf_Byte syminfo, |
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52 | const Elf_Word symvalue) |
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53 | { |
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54 | Elf_Addr target = 0; |
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55 | Elf_Addr* where; |
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56 | Elf_Addr tmp; |
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57 | |
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58 | where = (Elf_Addr *)(sect->base + rel->r_offset); |
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59 | |
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60 | switch (ELF_R_TYPE(rel->r_info)) { |
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61 | case R_TYPE(NONE): |
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62 | break; |
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63 | |
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64 | case R_TYPE(PC32): |
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65 | target = (Elf_Addr) symvalue; |
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66 | *where += target - (Elf_Addr)where; |
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67 | |
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68 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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69 | printf ("rtl: reloc PC32 in %s --> %p (%p @ %p) in %s\n", |
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70 | sect->name, (void*) symvalue, |
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71 | (void *)*where, where, rtems_rtl_obj_oname (obj)); |
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72 | break; |
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73 | |
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74 | case R_TYPE(GOT32): |
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75 | case R_TYPE(32): |
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76 | case R_TYPE(GLOB_DAT): |
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77 | target = (Elf_Addr) symvalue; |
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78 | |
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79 | tmp = target + *where; |
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80 | if (*where != tmp) |
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81 | *where = tmp; |
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82 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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83 | printf ("rtl: reloc 32/GLOB_DAT in %s --> %p @ %p in %s\n", |
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84 | sect->name, (void *)*where, where, |
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85 | rtems_rtl_obj_oname (obj)); |
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86 | break; |
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87 | |
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88 | case R_TYPE(RELATIVE): |
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89 | *where += (Elf_Addr)sect->base; |
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90 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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91 | printf ("rtl: reloc RELATIVE in %s --> %p @ %p\n", |
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92 | rtems_rtl_obj_oname (obj), (void *)*where, where); |
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93 | break; |
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94 | |
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95 | case R_TYPE(COPY): |
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96 | printf ("rtl: reloc COPY (please report)\n"); |
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97 | break; |
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98 | |
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99 | default: |
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100 | printf ("rtl: reloc unknown: sym = %lu, type = %lu, offset = %p, " |
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101 | "contents = %p\n", |
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102 | ELF_R_SYM(rel->r_info), (uint32_t) ELF_R_TYPE(rel->r_info), |
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103 | (void *)rel->r_offset, (void *)*where); |
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104 | rtems_rtl_set_error (EINVAL, |
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105 | "%s: Unsupported relocation type %ld " |
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106 | "in non-PLT relocations", |
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107 | sect->name, (uint32_t) ELF_R_TYPE(rel->r_info)); |
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108 | return false; |
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109 | } |
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110 | |
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111 | return true; |
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112 | } |
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113 | |
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114 | bool |
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115 | rtems_rtl_elf_unwind_parse (const rtems_rtl_obj* obj, |
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116 | const char* name, |
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117 | uint32_t flags) |
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118 | { |
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119 | return rtems_rtl_elf_unwind_dw2_parse (obj, name, flags); |
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120 | } |
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121 | |
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122 | bool |
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123 | rtems_rtl_elf_unwind_register (rtems_rtl_obj* obj) |
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124 | { |
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125 | return rtems_rtl_elf_unwind_dw2_register (obj); |
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126 | } |
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127 | |
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128 | bool |
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129 | rtems_rtl_elf_unwind_deregister (rtems_rtl_obj* obj) |
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130 | { |
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131 | return rtems_rtl_elf_unwind_dw2_deregister (obj); |
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132 | } |
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