[ae5fe7e6] | 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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[194eb403] | 10 | #include <inttypes.h> |
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[ae5fe7e6] | 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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[990adc5] | 18 | #include <rtems/rtl/rtl-trace.h> |
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[c6eead1] | 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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[f59d435d] | 23 | rtems_rtl_elf_section_flags (const rtems_rtl_obj* obj, |
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| 24 | const Elf_Shdr* shdr) |
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[c6eead1] | 25 | { |
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| 26 | return 0; |
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| 27 | } |
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[ae5fe7e6] | 28 | |
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[6c9f017] | 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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[ae5fe7e6] | 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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[d8c70ba6] | 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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[ae5fe7e6] | 76 | bool |
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[d8c70ba6] | 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 false; |
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| 92 | } |
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| 93 | |
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| 94 | bool |
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| 95 | rtems_rtl_elf_relocate_rela (rtems_rtl_obj* obj, |
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[f59d435d] | 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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[ae5fe7e6] | 101 | { |
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[d8c70ba6] | 102 | (void) obj; |
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[194eb403] | 103 | (void) rel; |
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[d8c70ba6] | 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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[ae5fe7e6] | 108 | rtems_rtl_set_error (EINVAL, "rela type record not supported"); |
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| 109 | return false; |
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| 110 | } |
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| 111 | |
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| 112 | bool |
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[d8c70ba6] | 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 true; |
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| 127 | } |
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| 128 | |
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| 129 | bool |
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| 130 | rtems_rtl_elf_relocate_rel (rtems_rtl_obj* obj, |
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[f59d435d] | 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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[ae5fe7e6] | 136 | { |
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[f59d435d] | 137 | Elf_Addr target = 0; |
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[ae5fe7e6] | 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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[194eb403] | 183 | printf ("rtl: reloc unknown: sym = %i, type = %" PRIu32 ", offset = %p, " |
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[ae5fe7e6] | 184 | "contents = %p\n", |
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[194eb403] | 185 | (int) ELF_R_SYM(rel->r_info), (uint32_t) ELF_R_TYPE(rel->r_info), |
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[ae5fe7e6] | 186 | (void *)rel->r_offset, (void *)*where); |
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| 187 | rtems_rtl_set_error (EINVAL, |
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[194eb403] | 188 | "%s: Unsupported relocation type %" PRIu32 " " |
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[ae5fe7e6] | 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 false; |
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| 192 | } |
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| 193 | |
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| 194 | return true; |
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| 195 | } |
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[c6eead1] | 196 | |
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| 197 | bool |
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[f59d435d] | 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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[c6eead1] | 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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[f59d435d] | 206 | rtems_rtl_elf_unwind_register (rtems_rtl_obj* obj) |
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[c6eead1] | 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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[f59d435d] | 212 | rtems_rtl_elf_unwind_deregister (rtems_rtl_obj* obj) |
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[c6eead1] | 213 | { |
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| 214 | return rtems_rtl_elf_unwind_dw2_deregister (obj); |
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| 215 | } |
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