[ae5fe7e6] | 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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[990adc5] | 11 | #include <rtems/rtl/rtl-trace.h> |
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[c6eead1] | 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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[f59d435d] | 16 | rtems_rtl_elf_section_flags (const rtems_rtl_obj* obj, |
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| 17 | const Elf_Shdr* shdr) |
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[c6eead1] | 18 | { |
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| 19 | return 0; |
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| 20 | } |
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[ae5fe7e6] | 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 | bool |
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[f59d435d] | 29 | rtems_rtl_elf_relocate_rela (const rtems_rtl_obj* obj, |
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| 30 | const Elf_Rela* rela, |
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| 31 | const rtems_rtl_obj_sect* sect, |
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| 32 | const char* symname, |
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| 33 | const Elf_Byte syminfo, |
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| 34 | const Elf_Word symvalue) |
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[ae5fe7e6] | 35 | { |
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| 36 | Elf_Addr *where; |
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| 37 | Elf32_Word tmp; |
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| 38 | Elf32_Word insn; |
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| 39 | |
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| 40 | |
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| 41 | where = (Elf_Addr *)(sect->base + rela->r_offset); |
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| 42 | |
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| 43 | switch (ELF_R_TYPE(rela->r_info)) { |
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| 44 | case R_TYPE(NONE): |
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| 45 | break; |
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| 46 | |
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| 47 | case R_TYPE(HI16): |
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| 48 | insn = *where; |
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| 49 | /* orhi/mvhi instruction |
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| 50 | * 31--------26|25-21|20-16|15----0| |
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| 51 | * |0 1 1 1 1 0 |rY |rX |imm16 | |
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| 52 | */ |
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| 53 | if (0x1e == (insn >> 26)) { |
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| 54 | insn &= 0xffff0000; |
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| 55 | insn |= ((symvalue + rela->r_addend) >> 16); |
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| 56 | *where = insn; |
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| 57 | } |
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| 58 | break; |
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| 59 | |
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| 60 | case R_TYPE(LO16): |
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| 61 | insn = *where; |
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| 62 | /* ori instruction |
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| 63 | * 31--------26|25-21|20-16|15----0| |
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| 64 | * |0 0 1 1 1 0 |rY |rX |imm16 | |
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| 65 | */ |
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| 66 | if (0xe == (insn >> 26)) { |
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| 67 | insn &= 0xffff0000; |
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| 68 | insn |= ((symvalue + rela->r_addend) & 0xffff); |
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| 69 | *where = insn; |
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| 70 | } |
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| 71 | break; |
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| 72 | |
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| 73 | case R_TYPE(CALL): |
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| 74 | insn = *where; |
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| 75 | /* |
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| 76 | * calli instruction |
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| 77 | * 31-------26|25---0| |
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| 78 | * |1 1 1 1 1 0|imm26 | |
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| 79 | * Syntax: call imm26 |
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| 80 | * Operation: ra = pc + 4; pc = pc + sign_extend(imm26<<2) |
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| 81 | */ |
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| 82 | if (0x3e == (insn >> 26)) { |
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| 83 | Elf_Sword imm26 = symvalue +rela->r_addend - (Elf_Addr)where; |
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| 84 | imm26 = (imm26 >> 2) & 0x3ffffff; |
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| 85 | insn = 0xf8000000 + imm26; |
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| 86 | *where = insn; |
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| 87 | } |
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| 88 | break; |
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| 89 | |
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| 90 | case R_TYPE(BRANCH): |
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| 91 | insn = *where; |
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| 92 | tmp = symvalue + rela->r_addend - (Elf_Addr)where; |
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| 93 | tmp = (Elf32_Sword)tmp >> 2; |
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| 94 | if (((Elf32_Sword)tmp > 0x7fff) || ((Elf32_Sword)tmp < -0x8000)){ |
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| 95 | printf("BRANCH Overflow\n"); |
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| 96 | return false; |
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| 97 | } |
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| 98 | |
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| 99 | *where = (*where & 0xffff0000) | (tmp & 0xffff); |
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| 100 | break; |
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| 101 | |
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| 102 | case R_TYPE(32): |
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| 103 | *where = symvalue + rela->r_addend; |
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| 104 | break; |
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| 105 | |
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| 106 | default: |
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| 107 | rtems_rtl_set_error (EINVAL, "rela type record not supported"); |
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| 108 | printf("Unsupported reloc types\n"); |
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| 109 | return false; |
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| 110 | } |
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| 111 | |
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| 112 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) { |
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| 113 | printf("rela relocation type is %ld\n", ELF_R_TYPE(rela->r_info)); |
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| 114 | printf("relocated address 0x%08lx\n", (Elf_Addr)where); |
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| 115 | } |
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| 116 | return true; |
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| 117 | } |
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| 118 | |
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| 119 | bool |
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[f59d435d] | 120 | rtems_rtl_elf_relocate_rel (const rtems_rtl_obj* obj, |
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| 121 | const Elf_Rel* rel, |
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| 122 | const rtems_rtl_obj_sect* sect, |
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| 123 | const char* symname, |
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| 124 | const Elf_Byte syminfo, |
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| 125 | const Elf_Word symvalue) |
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[ae5fe7e6] | 126 | { |
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| 127 | rtems_rtl_set_error (EINVAL, "rela type record not supported"); |
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| 128 | return false; |
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| 129 | } |
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[c6eead1] | 130 | |
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| 131 | bool |
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[f59d435d] | 132 | rtems_rtl_elf_unwind_parse (const rtems_rtl_obj* obj, |
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| 133 | const char* name, |
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| 134 | uint32_t flags) |
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[c6eead1] | 135 | { |
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| 136 | return rtems_rtl_elf_unwind_dw2_parse (obj, name, flags); |
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| 137 | } |
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| 138 | |
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| 139 | bool |
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[f59d435d] | 140 | rtems_rtl_elf_unwind_register (rtems_rtl_obj* obj) |
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[c6eead1] | 141 | { |
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| 142 | return rtems_rtl_elf_unwind_dw2_register (obj); |
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| 143 | } |
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| 144 | |
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| 145 | bool |
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[f59d435d] | 146 | rtems_rtl_elf_unwind_deregister (rtems_rtl_obj* obj) |
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[c6eead1] | 147 | { |
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| 148 | return rtems_rtl_elf_unwind_dw2_deregister (obj); |
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| 149 | } |
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