[ae5fe7e6] | 1 | /* |
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[b36c5209] | 2 | * COPYRIGHT (c) 2012-2019 Chris Johns <chrisj@rtems.org> |
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[ae5fe7e6] | 3 | * |
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| 4 | * The license and distribution terms for this file may be |
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| 5 | * found in the file LICENSE in this distribution or at |
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[d4edbdbc] | 6 | * http://www.rtems.org/license/LICENSE. |
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[ae5fe7e6] | 7 | */ |
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| 8 | /** |
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| 9 | * @file |
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| 10 | * |
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| 11 | * @ingroup rtems_rtld |
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| 12 | * |
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| 13 | * @brief RTEMS Run-Time Link Editor |
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| 14 | * |
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| 15 | * This is the RTL implementation. |
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| 16 | */ |
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| 17 | |
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| 18 | #if HAVE_CONFIG_H |
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| 19 | #include "config.h" |
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| 20 | #endif |
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| 21 | |
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| 22 | #include <errno.h> |
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| 23 | #include <fcntl.h> |
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[194eb403] | 24 | #include <inttypes.h> |
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[ae5fe7e6] | 25 | #include <stdlib.h> |
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| 26 | #include <string.h> |
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| 27 | #include <stdio.h> |
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| 28 | #include <unistd.h> |
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| 29 | |
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| 30 | #include <rtems/rtl/rtl.h> |
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| 31 | #include "rtl-elf.h" |
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| 32 | #include "rtl-error.h" |
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[990adc5] | 33 | #include <rtems/rtl/rtl-trace.h> |
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[b36c5209] | 34 | #include "rtl-trampoline.h" |
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[c6eead1] | 35 | #include "rtl-unwind.h" |
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[990adc5] | 36 | #include <rtems/rtl/rtl-unresolved.h> |
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[ae5fe7e6] | 37 | |
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| 38 | /** |
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[b36c5209] | 39 | * The offsets in the reloc words. |
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[ae5fe7e6] | 40 | */ |
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| 41 | #define REL_R_OFFSET (0) |
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| 42 | #define REL_R_INFO (1) |
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| 43 | #define REL_R_ADDEND (2) |
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| 44 | |
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| 45 | /** |
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| 46 | * The ELF format signature. |
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| 47 | */ |
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[f59d435d] | 48 | static rtems_rtl_loader_format elf_sig = |
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[ae5fe7e6] | 49 | { |
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| 50 | .label = "ELF", |
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| 51 | .flags = RTEMS_RTL_FMT_ELF |
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| 52 | }; |
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| 53 | |
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[74883be5] | 54 | static const char* |
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| 55 | rtems_rtl_elf_sym_type_label (Elf_Byte st_info) |
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| 56 | { |
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| 57 | const char* label; |
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| 58 | switch (ELF_ST_TYPE (st_info)) |
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| 59 | { |
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| 60 | case STT_NOTYPE: |
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| 61 | label = "STT_NOTYPE"; |
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| 62 | break; |
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| 63 | case STT_OBJECT: |
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| 64 | label = "STT_OBJECT"; |
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| 65 | break; |
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| 66 | case STT_FUNC: |
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| 67 | label = "STT_FUNC"; |
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| 68 | break; |
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| 69 | case STT_SECTION: |
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| 70 | label = "STT_SECTION"; |
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| 71 | break; |
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| 72 | case STT_FILE: |
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| 73 | label = "STT_FILE"; |
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| 74 | break; |
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| 75 | case STT_COMMON: |
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| 76 | label = "STT_COMMON"; |
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| 77 | break; |
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| 78 | case STT_TLS: |
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| 79 | label = "STT_TLS"; |
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| 80 | break; |
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| 81 | default: |
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| 82 | label = "unknown"; |
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| 83 | break; |
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| 84 | } |
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| 85 | return label; |
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| 86 | } |
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| 87 | |
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| 88 | static const char* |
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| 89 | rtems_rtl_elf_sym_bind_label (Elf_Byte st_info) |
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| 90 | { |
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| 91 | const char* label; |
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| 92 | switch (ELF_ST_BIND (st_info)) |
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| 93 | { |
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| 94 | case STB_LOCAL: |
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| 95 | label = "STB_LOCAL"; |
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| 96 | break; |
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| 97 | case STB_GLOBAL: |
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| 98 | label = "STB_GLOBAL"; |
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| 99 | break; |
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| 100 | case STB_WEAK: |
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| 101 | label = "STB_WEAK"; |
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| 102 | break; |
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| 103 | default: |
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| 104 | label = "unknown"; |
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| 105 | break; |
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| 106 | } |
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| 107 | return label; |
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| 108 | } |
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| 109 | |
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[ae5fe7e6] | 110 | static bool |
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| 111 | rtems_rtl_elf_machine_check (Elf_Ehdr* ehdr) |
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| 112 | { |
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| 113 | /* |
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| 114 | * This code is determined by the NetBSD machine headers. |
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| 115 | */ |
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| 116 | switch (ehdr->e_machine) |
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| 117 | { |
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| 118 | ELFDEFNNAME (MACHDEP_ID_CASES) |
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| 119 | default: |
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| 120 | return false; |
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| 121 | } |
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| 122 | return true; |
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| 123 | } |
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| 124 | |
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[194eb403] | 125 | static const char* |
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| 126 | rtems_rtl_elf_separated_section (const char* name) |
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| 127 | { |
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| 128 | struct { |
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| 129 | const char* label; |
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| 130 | size_t len; |
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| 131 | } prefix[] = { |
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| 132 | #define SEPARATED_PREFIX(_p) { _p, sizeof (_p) - 1 } |
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| 133 | SEPARATED_PREFIX (".text."), |
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| 134 | SEPARATED_PREFIX (".rel.text."), |
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| 135 | SEPARATED_PREFIX (".data."), |
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| 136 | SEPARATED_PREFIX (".rel.data."), |
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| 137 | SEPARATED_PREFIX (".rodata."), |
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| 138 | SEPARATED_PREFIX (".rel.rodata.") |
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| 139 | }; |
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| 140 | const size_t prefixes = sizeof (prefix) / sizeof (prefix[0]); |
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| 141 | size_t p; |
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| 142 | for (p = 0; p < prefixes; ++p) |
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| 143 | { |
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| 144 | if (strncmp (name, prefix[p].label, prefix[p].len) == 0) |
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| 145 | return name + prefix[p].len; |
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| 146 | } |
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| 147 | return NULL; |
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| 148 | } |
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| 149 | |
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[03139d5b] | 150 | static bool |
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| 151 | rtems_rtl_elf_find_symbol (rtems_rtl_obj* obj, |
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| 152 | const Elf_Sym* sym, |
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| 153 | const char* symname, |
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| 154 | rtems_rtl_obj_sym** symbol, |
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| 155 | Elf_Word* value) |
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[ae5fe7e6] | 156 | { |
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[f59d435d] | 157 | rtems_rtl_obj_sect* sect; |
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[ae5fe7e6] | 158 | |
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[03139d5b] | 159 | /* |
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| 160 | * If the symbol type is STT_NOTYPE the symbol references a global |
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| 161 | * symbol. The gobal symbol table is searched to find it and that value |
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| 162 | * returned. If the symbol is local to the object module the section for the |
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| 163 | * symbol is located and it's base added to the symbol's value giving an |
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| 164 | * absolute location. |
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| 165 | */ |
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| 166 | if (ELF_ST_TYPE(sym->st_info) == STT_NOTYPE || sym->st_shndx == SHN_COMMON) |
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[ae5fe7e6] | 167 | { |
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[a2e1e30d] | 168 | /* |
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| 169 | * Search the object file then the global table for the symbol. |
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| 170 | */ |
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[03139d5b] | 171 | *symbol = rtems_rtl_symbol_obj_find (obj, symname); |
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| 172 | if (!*symbol) |
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[ae5fe7e6] | 173 | return false; |
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| 174 | |
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[03139d5b] | 175 | *value = (Elf_Addr) (*symbol)->value; |
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[ae5fe7e6] | 176 | return true; |
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| 177 | } |
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| 178 | |
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[03139d5b] | 179 | *symbol = NULL; |
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| 180 | |
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[ae5fe7e6] | 181 | sect = rtems_rtl_obj_find_section_by_index (obj, sym->st_shndx); |
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| 182 | if (!sect) |
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| 183 | return false; |
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| 184 | |
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[8bdbefe] | 185 | *value = sym->st_value + (Elf_Addr) sect->base; |
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[194eb403] | 186 | |
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[ae5fe7e6] | 187 | return true; |
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| 188 | } |
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| 189 | |
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[03139d5b] | 190 | /** |
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| 191 | * Relocation worker routine. |
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| 192 | */ |
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| 193 | typedef bool (*rtems_rtl_elf_reloc_handler)(rtems_rtl_obj* obj, |
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| 194 | bool is_rela, |
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| 195 | void* relbuf, |
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| 196 | rtems_rtl_obj_sect* targetsect, |
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| 197 | rtems_rtl_obj_sym* symbol, |
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| 198 | Elf_Sym* sym, |
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| 199 | const char* symname, |
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| 200 | Elf_Word symvalue, |
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| 201 | bool resolved, |
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| 202 | void* data); |
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| 203 | |
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| 204 | /** |
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| 205 | * Relocation parser data. |
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| 206 | */ |
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| 207 | typedef struct |
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| 208 | { |
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| 209 | size_t dependents; /**< The number of dependent object files. */ |
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| 210 | size_t unresolved; /**< The number of unresolved symbols. */ |
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| 211 | } rtems_rtl_elf_reloc_data; |
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| 212 | |
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| 213 | static bool |
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| 214 | rtems_rtl_elf_reloc_parser (rtems_rtl_obj* obj, |
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| 215 | bool is_rela, |
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| 216 | void* relbuf, |
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| 217 | rtems_rtl_obj_sect* targetsect, |
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| 218 | rtems_rtl_obj_sym* symbol, |
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| 219 | Elf_Sym* sym, |
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| 220 | const char* symname, |
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| 221 | Elf_Word symvalue, |
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| 222 | bool resolved, |
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| 223 | void* data) |
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| 224 | { |
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| 225 | rtems_rtl_elf_reloc_data* rd = (rtems_rtl_elf_reloc_data*) data; |
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[b36c5209] | 226 | rtems_rtl_word rel_words[3]; |
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| 227 | rtems_rtl_elf_rel_status rs; |
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[d8c70ba6] | 228 | |
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| 229 | /* |
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[b36c5209] | 230 | * Check the reloc record to see if a trampoline is needed. |
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[03139d5b] | 231 | */ |
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[b36c5209] | 232 | if (is_rela) |
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[03139d5b] | 233 | { |
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[b36c5209] | 234 | const Elf_Rela* rela = (const Elf_Rela*) relbuf; |
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| 235 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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| 236 | printf ("rtl: rela tramp: sym: %c:%s(%d)=%08jx type:%d off:%08jx addend:%d\n", |
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| 237 | ELF_ST_BIND (sym->st_info) == STB_GLOBAL || |
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| 238 | ELF_ST_BIND (sym->st_info) == STB_WEAK ? 'G' : 'L', |
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| 239 | symname, (int) ELF_R_SYM (rela->r_info), |
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| 240 | (uintmax_t) symvalue, (int) ELF_R_TYPE (rela->r_info), |
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| 241 | (uintmax_t) rela->r_offset, (int) rela->r_addend); |
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| 242 | rs = rtems_rtl_elf_relocate_rela_tramp (obj, rela, targetsect, |
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| 243 | symname, sym->st_info, symvalue); |
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| 244 | rel_words[REL_R_OFFSET] = rela->r_offset; |
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| 245 | rel_words[REL_R_INFO] = rela->r_info; |
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| 246 | rel_words[REL_R_ADDEND] = rela->r_addend; |
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[03139d5b] | 247 | } |
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[194eb403] | 248 | else |
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[b36c5209] | 249 | { |
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| 250 | const Elf_Rel* rel = (const Elf_Rel*) relbuf; |
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| 251 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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| 252 | printf ("rtl: rel tramp: sym: %c:%s(%d)=%08jx type:%d off:%08jx\n", |
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| 253 | ELF_ST_BIND (sym->st_info) == STB_GLOBAL || |
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| 254 | ELF_ST_BIND (sym->st_info) == STB_WEAK ? 'G' : 'L', |
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| 255 | symname, (int) ELF_R_SYM (rel->r_info), |
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| 256 | (uintmax_t) symvalue, (int) ELF_R_TYPE (rel->r_info), |
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| 257 | (uintmax_t) rel->r_offset); |
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| 258 | rs = rtems_rtl_elf_relocate_rel_tramp (obj, rel, targetsect, |
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| 259 | symname, sym->st_info, symvalue); |
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| 260 | rel_words[REL_R_OFFSET] = rel->r_offset; |
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| 261 | rel_words[REL_R_INFO] = rel->r_info; |
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| 262 | rel_words[REL_R_ADDEND] = 0; |
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| 263 | } |
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| 264 | |
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| 265 | if (rs == rtems_rtl_elf_rel_failure) |
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| 266 | return false; |
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| 267 | |
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| 268 | if (rs == rtems_rtl_elf_rel_tramp_cache || rs == rtems_rtl_elf_rel_tramp_add) |
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| 269 | { |
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| 270 | uint32_t flags = (is_rela ? 1 : 0) | (resolved ? 0 : 1 << 1) | (sym->st_info << 8); |
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| 271 | if (!rtems_rtl_trampoline_add (obj, flags, |
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| 272 | targetsect->section, symvalue, rel_words)) |
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| 273 | return false; |
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| 274 | } |
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| 275 | |
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| 276 | /* |
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| 277 | * Handle any dependencies if there is a valid symbol. |
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| 278 | */ |
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| 279 | if (symname != NULL) |
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[03139d5b] | 280 | { |
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| 281 | /* |
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[b36c5209] | 282 | * Find the symbol's object file. It cannot be NULL so ignore that result |
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| 283 | * if returned, it means something is corrupted. We are in an iterator. |
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[03139d5b] | 284 | */ |
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[b36c5209] | 285 | rtems_rtl_obj* sobj = rtems_rtl_find_obj_with_symbol (symbol); |
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| 286 | if (sobj != NULL) |
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[03139d5b] | 287 | { |
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| 288 | /* |
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[b36c5209] | 289 | * A dependency is not the base kernel image or itself. Tag the object as |
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| 290 | * having been visited so we count it only once. |
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[03139d5b] | 291 | */ |
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[b36c5209] | 292 | if (sobj != rtems_rtl_baseimage () && obj != sobj && |
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| 293 | (sobj->flags & RTEMS_RTL_OBJ_RELOC_TAG) == 0) |
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[03139d5b] | 294 | { |
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[b36c5209] | 295 | sobj->flags |= RTEMS_RTL_OBJ_RELOC_TAG; |
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| 296 | ++rd->dependents; |
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[03139d5b] | 297 | } |
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| 298 | } |
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| 299 | } |
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[194eb403] | 300 | |
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[03139d5b] | 301 | return true; |
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| 302 | } |
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| 303 | |
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| 304 | static bool |
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| 305 | rtems_rtl_elf_reloc_relocator (rtems_rtl_obj* obj, |
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| 306 | bool is_rela, |
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| 307 | void* relbuf, |
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| 308 | rtems_rtl_obj_sect* targetsect, |
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| 309 | rtems_rtl_obj_sym* symbol, |
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| 310 | Elf_Sym* sym, |
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| 311 | const char* symname, |
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| 312 | Elf_Word symvalue, |
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| 313 | bool resolved, |
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| 314 | void* data) |
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| 315 | { |
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| 316 | const Elf_Rela* rela = (const Elf_Rela*) relbuf; |
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| 317 | const Elf_Rel* rel = (const Elf_Rel*) relbuf; |
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| 318 | |
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| 319 | if (!resolved) |
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| 320 | { |
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| 321 | uint16_t flags = 0; |
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| 322 | rtems_rtl_word rel_words[3]; |
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| 323 | |
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| 324 | if (is_rela) |
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| 325 | { |
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| 326 | flags = 1; |
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| 327 | rel_words[REL_R_OFFSET] = rela->r_offset; |
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| 328 | rel_words[REL_R_INFO] = rela->r_info; |
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| 329 | rel_words[REL_R_ADDEND] = rela->r_addend; |
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| 330 | } |
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| 331 | else |
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| 332 | { |
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| 333 | rel_words[REL_R_OFFSET] = rel->r_offset; |
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| 334 | rel_words[REL_R_INFO] = rel->r_info; |
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| 335 | rel_words[REL_R_ADDEND] = 0; |
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| 336 | } |
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| 337 | |
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| 338 | if (!rtems_rtl_unresolved_add (obj, |
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| 339 | flags, |
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| 340 | symname, |
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| 341 | targetsect->section, |
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| 342 | rel_words)) |
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| 343 | return false; |
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| 344 | |
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| 345 | ++obj->unresolved; |
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| 346 | } |
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| 347 | else |
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| 348 | { |
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[b36c5209] | 349 | rtems_rtl_obj* sobj; |
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| 350 | rtems_rtl_elf_rel_status rs; |
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[03139d5b] | 351 | |
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| 352 | if (is_rela) |
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| 353 | { |
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| 354 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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| 355 | printf ("rtl: rela: sym:%s(%d)=%08jx type:%d off:%08jx addend:%d\n", |
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| 356 | symname, (int) ELF_R_SYM (rela->r_info), |
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| 357 | (uintmax_t) symvalue, (int) ELF_R_TYPE (rela->r_info), |
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| 358 | (uintmax_t) rela->r_offset, (int) rela->r_addend); |
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[b36c5209] | 359 | rs = rtems_rtl_elf_relocate_rela (obj, rela, targetsect, |
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| 360 | symname, sym->st_info, symvalue); |
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| 361 | if (rs != rtems_rtl_elf_rel_no_error) |
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[03139d5b] | 362 | return false; |
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| 363 | } |
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| 364 | else |
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| 365 | { |
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| 366 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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| 367 | printf ("rtl: rel: sym:%s(%d)=%08jx type:%d off:%08jx\n", |
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| 368 | symname, (int) ELF_R_SYM (rel->r_info), |
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| 369 | (uintmax_t) symvalue, (int) ELF_R_TYPE (rel->r_info), |
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| 370 | (uintmax_t) rel->r_offset); |
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[b36c5209] | 371 | rs = rtems_rtl_elf_relocate_rel (obj, rel, targetsect, |
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| 372 | symname, sym->st_info, symvalue); |
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| 373 | if (rs != rtems_rtl_elf_rel_no_error) |
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[03139d5b] | 374 | return false; |
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| 375 | } |
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| 376 | |
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| 377 | sobj = rtems_rtl_find_obj_with_symbol (symbol); |
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[89c59be] | 378 | |
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| 379 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_DEPENDENCY)) |
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| 380 | printf ("rtl: depend: %s -> %s:%s\n", |
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| 381 | obj->oname, |
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| 382 | sobj == NULL ? "not-found" : sobj->oname, |
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| 383 | symname); |
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| 384 | |
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[03139d5b] | 385 | if (sobj != NULL) |
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| 386 | { |
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| 387 | if (rtems_rtl_obj_add_dependent (obj, sobj)) |
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| 388 | rtems_rtl_obj_inc_reference (sobj); |
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| 389 | } |
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| 390 | } |
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| 391 | |
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| 392 | return true; |
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| 393 | } |
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| 394 | |
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[ae5fe7e6] | 395 | static bool |
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[03139d5b] | 396 | rtems_rtl_elf_relocate_worker (rtems_rtl_obj* obj, |
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| 397 | int fd, |
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| 398 | rtems_rtl_obj_sect* sect, |
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| 399 | rtems_rtl_elf_reloc_handler handler, |
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| 400 | void* data) |
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[ae5fe7e6] | 401 | { |
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[f59d435d] | 402 | rtems_rtl_obj_cache* symbols; |
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| 403 | rtems_rtl_obj_cache* strings; |
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| 404 | rtems_rtl_obj_cache* relocs; |
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| 405 | rtems_rtl_obj_sect* targetsect; |
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| 406 | rtems_rtl_obj_sect* symsect; |
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| 407 | rtems_rtl_obj_sect* strtab; |
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| 408 | bool is_rela; |
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| 409 | size_t reloc_size; |
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| 410 | int reloc; |
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[ae5fe7e6] | 411 | |
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| 412 | /* |
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| 413 | * First check if the section the relocations are for exists. If it does not |
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| 414 | * exist ignore these relocations. They are most probably debug sections. |
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| 415 | */ |
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| 416 | targetsect = rtems_rtl_obj_find_section_by_index (obj, sect->info); |
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| 417 | if (!targetsect) |
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| 418 | return true; |
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| 419 | |
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[194eb403] | 420 | /* |
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| 421 | * The section muct has been loaded. It could be a separate section in an |
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| 422 | * archive and not loaded. |
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| 423 | */ |
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| 424 | if ((targetsect->flags & RTEMS_RTL_OBJ_SECT_LOAD) == 0) |
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| 425 | return true; |
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| 426 | |
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| 427 | |
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[ae5fe7e6] | 428 | rtems_rtl_obj_caches (&symbols, &strings, &relocs); |
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| 429 | |
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| 430 | if (!symbols || !strings || !relocs) |
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| 431 | return false; |
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| 432 | |
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| 433 | symsect = rtems_rtl_obj_find_section (obj, ".symtab"); |
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| 434 | if (!symsect) |
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| 435 | { |
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| 436 | rtems_rtl_set_error (EINVAL, "no .symtab section"); |
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| 437 | return false; |
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| 438 | } |
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| 439 | |
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| 440 | strtab = rtems_rtl_obj_find_section (obj, ".strtab"); |
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| 441 | if (!strtab) |
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| 442 | { |
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| 443 | rtems_rtl_set_error (EINVAL, "no .strtab section"); |
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| 444 | return false; |
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| 445 | } |
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| 446 | |
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| 447 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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| 448 | printf ("rtl: relocation: %s, syms:%s\n", sect->name, symsect->name); |
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| 449 | |
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| 450 | /* |
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| 451 | * Handle the different relocation record types. |
---|
| 452 | */ |
---|
| 453 | is_rela = ((sect->flags & RTEMS_RTL_OBJ_SECT_RELA) == |
---|
| 454 | RTEMS_RTL_OBJ_SECT_RELA) ? true : false; |
---|
| 455 | reloc_size = is_rela ? sizeof (Elf_Rela) : sizeof (Elf_Rel); |
---|
| 456 | |
---|
| 457 | for (reloc = 0; reloc < (sect->size / reloc_size); ++reloc) |
---|
| 458 | { |
---|
[03139d5b] | 459 | uint8_t relbuf[reloc_size]; |
---|
| 460 | const Elf_Rela* rela = (const Elf_Rela*) relbuf; |
---|
| 461 | const Elf_Rel* rel = (const Elf_Rel*) relbuf; |
---|
| 462 | rtems_rtl_obj_sym* symbol = NULL; |
---|
| 463 | Elf_Sym sym; |
---|
| 464 | const char* symname = NULL; |
---|
| 465 | off_t off; |
---|
| 466 | Elf_Word rel_type; |
---|
| 467 | Elf_Word symvalue = 0; |
---|
| 468 | bool resolved; |
---|
[ae5fe7e6] | 469 | |
---|
| 470 | off = obj->ooffset + sect->offset + (reloc * reloc_size); |
---|
| 471 | |
---|
| 472 | if (!rtems_rtl_obj_cache_read_byval (relocs, fd, off, |
---|
| 473 | &relbuf[0], reloc_size)) |
---|
| 474 | return false; |
---|
| 475 | |
---|
[c6eead1] | 476 | /* |
---|
| 477 | * Read the symbol details. |
---|
| 478 | */ |
---|
[ae5fe7e6] | 479 | if (is_rela) |
---|
| 480 | off = (obj->ooffset + symsect->offset + |
---|
| 481 | (ELF_R_SYM (rela->r_info) * sizeof (sym))); |
---|
| 482 | else |
---|
| 483 | off = (obj->ooffset + symsect->offset + |
---|
| 484 | (ELF_R_SYM (rel->r_info) * sizeof (sym))); |
---|
| 485 | |
---|
| 486 | if (!rtems_rtl_obj_cache_read_byval (symbols, fd, off, |
---|
| 487 | &sym, sizeof (sym))) |
---|
| 488 | return false; |
---|
| 489 | |
---|
| 490 | /* |
---|
[803eac9] | 491 | * Only need the name of the symbol if global or a common symbol. |
---|
[ae5fe7e6] | 492 | */ |
---|
[b36c5209] | 493 | if (ELF_ST_TYPE (sym.st_info) == STT_OBJECT || |
---|
| 494 | ELF_ST_TYPE (sym.st_info) == STT_COMMON || |
---|
| 495 | ELF_ST_TYPE (sym.st_info) == STT_FUNC || |
---|
| 496 | ELF_ST_TYPE (sym.st_info) == STT_NOTYPE || |
---|
[194eb403] | 497 | ELF_ST_TYPE (sym.st_info) == STT_TLS || |
---|
[803eac9] | 498 | sym.st_shndx == SHN_COMMON) |
---|
[ae5fe7e6] | 499 | { |
---|
| 500 | size_t len; |
---|
| 501 | off = obj->ooffset + strtab->offset + sym.st_name; |
---|
| 502 | len = RTEMS_RTL_ELF_STRING_MAX; |
---|
| 503 | |
---|
| 504 | if (!rtems_rtl_obj_cache_read (strings, fd, off, |
---|
| 505 | (void**) &symname, &len)) |
---|
| 506 | return false; |
---|
| 507 | } |
---|
| 508 | |
---|
| 509 | /* |
---|
| 510 | * See if the record references an external symbol. If it does find the |
---|
| 511 | * symbol value. If the symbol cannot be found flag the object file as |
---|
[03139d5b] | 512 | * having unresolved externals and store the external. The load of an |
---|
[ae5fe7e6] | 513 | * object after this one may provide the unresolved externals. |
---|
| 514 | */ |
---|
| 515 | if (is_rela) |
---|
[03139d5b] | 516 | rel_type = ELF_R_TYPE(rela->r_info); |
---|
[ae5fe7e6] | 517 | else |
---|
[03139d5b] | 518 | rel_type = ELF_R_TYPE(rel->r_info); |
---|
[ae5fe7e6] | 519 | |
---|
[03139d5b] | 520 | resolved = true; |
---|
[ae5fe7e6] | 521 | |
---|
[03139d5b] | 522 | if (rtems_rtl_elf_rel_resolve_sym (rel_type)) |
---|
| 523 | resolved = rtems_rtl_elf_find_symbol (obj, |
---|
| 524 | &sym, symname, |
---|
| 525 | &symbol, &symvalue); |
---|
[ae5fe7e6] | 526 | |
---|
[03139d5b] | 527 | if (!handler (obj, |
---|
| 528 | is_rela, relbuf, targetsect, |
---|
| 529 | symbol, &sym, symname, symvalue, resolved, |
---|
| 530 | data)) |
---|
| 531 | return false; |
---|
[ae5fe7e6] | 532 | } |
---|
| 533 | |
---|
| 534 | /* |
---|
| 535 | * Set the unresolved externals status if there are unresolved externals. |
---|
| 536 | */ |
---|
| 537 | if (obj->unresolved) |
---|
| 538 | obj->flags |= RTEMS_RTL_OBJ_UNRESOLVED; |
---|
| 539 | |
---|
| 540 | return true; |
---|
| 541 | } |
---|
| 542 | |
---|
[03139d5b] | 543 | static bool |
---|
| 544 | rtems_rtl_elf_relocs_parser (rtems_rtl_obj* obj, |
---|
| 545 | int fd, |
---|
| 546 | rtems_rtl_obj_sect* sect, |
---|
| 547 | void* data) |
---|
| 548 | { |
---|
| 549 | bool r = rtems_rtl_elf_relocate_worker (obj, fd, sect, |
---|
| 550 | rtems_rtl_elf_reloc_parser, data); |
---|
| 551 | return r; |
---|
| 552 | } |
---|
| 553 | |
---|
| 554 | static bool |
---|
| 555 | rtems_rtl_elf_relocs_locator (rtems_rtl_obj* obj, |
---|
| 556 | int fd, |
---|
| 557 | rtems_rtl_obj_sect* sect, |
---|
| 558 | void* data) |
---|
| 559 | { |
---|
| 560 | return rtems_rtl_elf_relocate_worker (obj, fd, sect, |
---|
| 561 | rtems_rtl_elf_reloc_relocator, data); |
---|
| 562 | } |
---|
| 563 | |
---|
[ae5fe7e6] | 564 | bool |
---|
[f59d435d] | 565 | rtems_rtl_obj_relocate_unresolved (rtems_rtl_unresolv_reloc* reloc, |
---|
| 566 | rtems_rtl_obj_sym* sym) |
---|
[ae5fe7e6] | 567 | { |
---|
[b36c5209] | 568 | rtems_rtl_obj_sect* sect; |
---|
| 569 | bool is_rela; |
---|
| 570 | Elf_Word symvalue; |
---|
| 571 | rtems_rtl_obj* sobj; |
---|
| 572 | rtems_rtl_elf_rel_status rs; |
---|
[ae5fe7e6] | 573 | |
---|
[03139d5b] | 574 | is_rela = reloc->flags & 1; |
---|
[ae5fe7e6] | 575 | |
---|
| 576 | sect = rtems_rtl_obj_find_section_by_index (reloc->obj, reloc->sect); |
---|
| 577 | if (!sect) |
---|
| 578 | { |
---|
| 579 | rtems_rtl_set_error (ENOEXEC, "unresolved sect not found"); |
---|
| 580 | return false; |
---|
| 581 | } |
---|
| 582 | |
---|
| 583 | symvalue = (Elf_Word) (intptr_t) sym->value; |
---|
| 584 | if (is_rela) |
---|
| 585 | { |
---|
| 586 | Elf_Rela rela; |
---|
| 587 | rela.r_offset = reloc->rel[REL_R_OFFSET]; |
---|
| 588 | rela.r_info = reloc->rel[REL_R_INFO]; |
---|
| 589 | rela.r_addend = reloc->rel[REL_R_ADDEND]; |
---|
| 590 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
---|
[8bdbefe] | 591 | printf ("rtl: rela: sym:%d type:%d off:%08jx addend:%d\n", |
---|
[ae5fe7e6] | 592 | (int) ELF_R_SYM (rela.r_info), (int) ELF_R_TYPE (rela.r_info), |
---|
[8bdbefe] | 593 | (uintmax_t) rela.r_offset, (int) rela.r_addend); |
---|
[b36c5209] | 594 | rs = rtems_rtl_elf_relocate_rela (reloc->obj, &rela, sect, |
---|
| 595 | sym->name, sym->data, symvalue); |
---|
| 596 | if (rs != rtems_rtl_elf_rel_no_error) |
---|
[ae5fe7e6] | 597 | return false; |
---|
| 598 | } |
---|
| 599 | else |
---|
| 600 | { |
---|
| 601 | Elf_Rel rel; |
---|
| 602 | rel.r_offset = reloc->rel[REL_R_OFFSET]; |
---|
| 603 | rel.r_info = reloc->rel[REL_R_INFO]; |
---|
| 604 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
---|
[8bdbefe] | 605 | printf ("rtl: rel: sym:%d type:%d off:%08jx\n", |
---|
[ae5fe7e6] | 606 | (int) ELF_R_SYM (rel.r_info), (int) ELF_R_TYPE (rel.r_info), |
---|
[8bdbefe] | 607 | (uintmax_t) rel.r_offset); |
---|
[b36c5209] | 608 | rs = rtems_rtl_elf_relocate_rel (reloc->obj, &rel, sect, |
---|
| 609 | sym->name, sym->data, symvalue); |
---|
| 610 | if (rs != rtems_rtl_elf_rel_no_error) |
---|
[ae5fe7e6] | 611 | return false; |
---|
| 612 | } |
---|
| 613 | |
---|
[03139d5b] | 614 | if (reloc->obj->unresolved > 0) |
---|
[ae5fe7e6] | 615 | { |
---|
| 616 | --reloc->obj->unresolved; |
---|
[03139d5b] | 617 | if (reloc->obj->unresolved == 0) |
---|
[ae5fe7e6] | 618 | reloc->obj->flags &= ~RTEMS_RTL_OBJ_UNRESOLVED; |
---|
| 619 | } |
---|
| 620 | |
---|
[03139d5b] | 621 | sobj = rtems_rtl_find_obj_with_symbol (sym); |
---|
[89c59be] | 622 | |
---|
| 623 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_DEPENDENCY)) |
---|
| 624 | printf ("rtl: depend: %s -> %s:%s\n", |
---|
| 625 | reloc->obj->oname, |
---|
| 626 | sobj == NULL ? "not-found" : sobj->oname, |
---|
| 627 | sym->name); |
---|
| 628 | |
---|
[03139d5b] | 629 | if (sobj != NULL) |
---|
| 630 | { |
---|
| 631 | if (rtems_rtl_obj_add_dependent (reloc->obj, sobj)) |
---|
| 632 | rtems_rtl_obj_inc_reference (sobj); |
---|
| 633 | } |
---|
| 634 | |
---|
[ae5fe7e6] | 635 | return true; |
---|
| 636 | } |
---|
| 637 | |
---|
[803eac9] | 638 | /** |
---|
| 639 | * Common symbol iterator data. |
---|
| 640 | */ |
---|
| 641 | typedef struct |
---|
| 642 | { |
---|
| 643 | size_t size; /**< The size of the common section */ |
---|
| 644 | uint32_t alignment; /**< The alignment of the common section. */ |
---|
| 645 | } rtems_rtl_elf_common_data; |
---|
| 646 | |
---|
| 647 | static bool |
---|
| 648 | rtems_rtl_elf_common (rtems_rtl_obj* obj, |
---|
| 649 | int fd, |
---|
| 650 | rtems_rtl_obj_sect* sect, |
---|
| 651 | void* data) |
---|
| 652 | { |
---|
| 653 | rtems_rtl_elf_common_data* common = (rtems_rtl_elf_common_data*) data; |
---|
| 654 | rtems_rtl_obj_cache* symbols; |
---|
| 655 | int sym; |
---|
| 656 | |
---|
| 657 | rtems_rtl_obj_caches (&symbols, NULL, NULL); |
---|
| 658 | |
---|
| 659 | if (!symbols) |
---|
| 660 | return false; |
---|
| 661 | |
---|
| 662 | /* |
---|
| 663 | * Find the number size of the common section by finding all symbols that |
---|
| 664 | * reference the SHN_COMMON section. |
---|
| 665 | */ |
---|
| 666 | for (sym = 0; sym < (sect->size / sizeof (Elf_Sym)); ++sym) |
---|
| 667 | { |
---|
| 668 | Elf_Sym symbol; |
---|
| 669 | off_t off; |
---|
| 670 | |
---|
| 671 | off = obj->ooffset + sect->offset + (sym * sizeof (symbol)); |
---|
| 672 | |
---|
| 673 | if (!rtems_rtl_obj_cache_read_byval (symbols, fd, off, |
---|
| 674 | &symbol, sizeof (symbol))) |
---|
| 675 | return false; |
---|
| 676 | |
---|
| 677 | if ((symbol.st_shndx == SHN_COMMON) && |
---|
| 678 | ((ELF_ST_TYPE (symbol.st_info) == STT_OBJECT) || |
---|
| 679 | (ELF_ST_TYPE (symbol.st_info) == STT_COMMON))) |
---|
| 680 | { |
---|
| 681 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_SYMBOL)) |
---|
[6c9f017] | 682 | printf ("rtl: com:elf:%-2d bind:%-2d type:%-2d size:%d value:%d name:%d\n", |
---|
[803eac9] | 683 | sym, (int) ELF_ST_BIND (symbol.st_info), |
---|
| 684 | (int) ELF_ST_TYPE (symbol.st_info), |
---|
[6c9f017] | 685 | (int) symbol.st_size, (int) symbol.st_value, |
---|
| 686 | (int) symbol.st_name); |
---|
[803eac9] | 687 | /* |
---|
| 688 | * If the size is zero this is the first entry, it defines the common |
---|
| 689 | * section's aligment. The symbol's value is the alignment. |
---|
| 690 | */ |
---|
| 691 | if (common->size == 0) |
---|
| 692 | common->alignment = symbol.st_value; |
---|
| 693 | common->size += |
---|
| 694 | rtems_rtl_obj_align (common->size, symbol.st_value) + symbol.st_size; |
---|
| 695 | } |
---|
| 696 | } |
---|
| 697 | |
---|
| 698 | return true; |
---|
| 699 | } |
---|
| 700 | |
---|
[b36c5209] | 701 | /** |
---|
| 702 | * Struct to handle trampoline reloc recs in the unresolved table. |
---|
| 703 | */ |
---|
| 704 | typedef struct rtems_rtl_tramp_data |
---|
| 705 | { |
---|
| 706 | bool failure; |
---|
| 707 | rtems_rtl_obj* obj; |
---|
| 708 | size_t count; |
---|
| 709 | size_t total; |
---|
| 710 | } rtems_rtl_tramp_data; |
---|
| 711 | |
---|
| 712 | static bool |
---|
| 713 | rtems_rtl_elf_tramp_resolve_reloc (rtems_rtl_unresolv_rec* rec, |
---|
| 714 | void* data) |
---|
| 715 | { |
---|
| 716 | rtems_rtl_tramp_data* td = (rtems_rtl_tramp_data*) data; |
---|
| 717 | if (rec->type == rtems_rtl_trampoline_reloc) |
---|
| 718 | { |
---|
| 719 | const rtems_rtl_tramp_reloc* tramp = &rec->rec.tramp; |
---|
| 720 | |
---|
| 721 | ++td->total; |
---|
| 722 | |
---|
| 723 | if (tramp->obj == td->obj) |
---|
| 724 | { |
---|
| 725 | const rtems_rtl_obj_sect* targetsect; |
---|
| 726 | Elf_Byte st_info; |
---|
| 727 | Elf_Word symvalue; |
---|
| 728 | rtems_rtl_elf_rel_status rs; |
---|
| 729 | bool* failure = (bool*) data; |
---|
| 730 | const bool is_rela = (tramp->flags & 1) == 1; |
---|
| 731 | const bool unresolved = (tramp->flags & (1 << 1)) != 0; |
---|
| 732 | |
---|
| 733 | ++td->count; |
---|
| 734 | |
---|
| 735 | targetsect = rtems_rtl_obj_find_section_by_index (tramp->obj, tramp->sect); |
---|
| 736 | st_info = tramp->flags >> 8; |
---|
| 737 | symvalue = tramp->symvalue; |
---|
| 738 | |
---|
| 739 | if (is_rela) |
---|
| 740 | { |
---|
| 741 | Elf_Rela rela = { |
---|
| 742 | .r_offset = tramp->rel[REL_R_OFFSET], |
---|
| 743 | .r_info = tramp->rel[REL_R_INFO], |
---|
| 744 | .r_addend = tramp->rel[REL_R_ADDEND] |
---|
| 745 | }; |
---|
| 746 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
---|
| 747 | printf ("rtl: rela tramp: check: %c(%d)=%08jx type:%d off:%08jx addend:%d\n", |
---|
| 748 | ELF_ST_BIND (st_info) == STB_GLOBAL || |
---|
| 749 | ELF_ST_BIND (st_info) == STB_WEAK ? 'G' : 'L', |
---|
| 750 | (int) ELF_R_SYM (rela.r_info), |
---|
| 751 | (uintmax_t) symvalue, (int) ELF_R_TYPE (rela.r_info), |
---|
| 752 | (uintmax_t) rela.r_offset, (int) rela.r_addend); |
---|
| 753 | rs = rtems_rtl_elf_relocate_rela_tramp (tramp->obj, &rela, targetsect, |
---|
| 754 | NULL, st_info, symvalue); |
---|
| 755 | } |
---|
| 756 | else |
---|
| 757 | { |
---|
| 758 | Elf_Rel rel = { |
---|
| 759 | .r_offset = tramp->rel[REL_R_OFFSET], |
---|
| 760 | .r_info = tramp->rel[REL_R_INFO], |
---|
| 761 | }; |
---|
| 762 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
---|
| 763 | printf ("rtl: rel tramp: check: %c(%d)=%08jx type:%d off:%08jx\n", |
---|
| 764 | ELF_ST_BIND (st_info) == STB_GLOBAL || |
---|
| 765 | ELF_ST_BIND (st_info) == STB_WEAK ? 'G' : 'L', |
---|
| 766 | (int) ELF_R_SYM (rel.r_info), |
---|
| 767 | (uintmax_t) symvalue, (int) ELF_R_TYPE (rel.r_info), |
---|
| 768 | (uintmax_t) rel.r_offset); |
---|
| 769 | rs = rtems_rtl_elf_relocate_rel_tramp (tramp->obj, &rel, targetsect, |
---|
| 770 | NULL, st_info, symvalue); |
---|
| 771 | } |
---|
| 772 | |
---|
| 773 | if (unresolved || rs == rtems_rtl_elf_rel_tramp_add) |
---|
| 774 | tramp->obj->tramps_size += tramp->obj->tramp_size; |
---|
| 775 | if (rs == rtems_rtl_elf_rel_failure) |
---|
| 776 | { |
---|
| 777 | *failure = true; |
---|
| 778 | return true; |
---|
| 779 | } |
---|
| 780 | } |
---|
| 781 | } |
---|
| 782 | |
---|
| 783 | return false; |
---|
| 784 | } |
---|
| 785 | |
---|
[d8c70ba6] | 786 | static bool |
---|
| 787 | rtems_rtl_elf_alloc_trampoline (rtems_rtl_obj* obj, size_t unresolved) |
---|
| 788 | { |
---|
[b36c5209] | 789 | rtems_rtl_tramp_data td = { 0 }; |
---|
| 790 | td.obj = obj; |
---|
| 791 | /* |
---|
| 792 | * See which relocs are out of range and need a trampoline. |
---|
| 793 | */ |
---|
| 794 | rtems_rtl_unresolved_iterate (rtems_rtl_elf_tramp_resolve_reloc, &td); |
---|
| 795 | if (td.failure) |
---|
| 796 | return false; |
---|
| 797 | rtems_rtl_trampoline_remove (obj); |
---|
| 798 | obj->tramp_relocs = obj->tramp_size == 0 ? 0 : obj->tramps_size / obj->tramp_size; |
---|
| 799 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
---|
| 800 | printf ("rtl: tramp:elf: tramps: %zu count:%zu total:%zu\n", |
---|
| 801 | obj->tramp_relocs, td.count, td.total); |
---|
[d8c70ba6] | 802 | /* |
---|
| 803 | * Add on enough space to handle the unresolved externals that need to be |
---|
| 804 | * resolved at some point in time. They could all require fixups and |
---|
| 805 | * trampolines. |
---|
| 806 | */ |
---|
[b36c5209] | 807 | obj->tramps_size += obj->tramp_size * unresolved; |
---|
| 808 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
---|
| 809 | printf ("rtl: tramp:elf: slots: %zu (%zu)\n", |
---|
| 810 | obj->tramp_size == 0 ? 0 : obj->tramps_size / obj->tramp_size, |
---|
| 811 | obj->tramps_size); |
---|
[d8c70ba6] | 812 | return rtems_rtl_obj_alloc_trampoline (obj); |
---|
| 813 | } |
---|
| 814 | |
---|
[03139d5b] | 815 | static bool |
---|
| 816 | rtems_rtl_elf_dependents (rtems_rtl_obj* obj, rtems_rtl_elf_reloc_data* reloc) |
---|
| 817 | { |
---|
| 818 | /* |
---|
| 819 | * If there are dependencies and no unresolved externals allocate and size |
---|
| 820 | * the dependency table to the number of dependent object files. If there are |
---|
| 821 | * unresolved externals the number of dependencies is unknown at this point |
---|
| 822 | * in time so use dynamic allocation to allocate the block size number of |
---|
| 823 | * entries when the entries are added. |
---|
| 824 | */ |
---|
| 825 | if (reloc->dependents > 0 && reloc->unresolved == 0) |
---|
| 826 | { |
---|
| 827 | if (!rtems_rtl_obj_alloc_dependents (obj, reloc->dependents)) |
---|
| 828 | return false; |
---|
| 829 | } |
---|
| 830 | return true; |
---|
| 831 | } |
---|
| 832 | |
---|
[ae5fe7e6] | 833 | static bool |
---|
[b36c5209] | 834 | rtems_rtl_elf_symbols_load (rtems_rtl_obj* obj, |
---|
| 835 | int fd, |
---|
| 836 | rtems_rtl_obj_sect* sect, |
---|
| 837 | void* data) |
---|
[ae5fe7e6] | 838 | { |
---|
[f59d435d] | 839 | rtems_rtl_obj_cache* symbols; |
---|
| 840 | rtems_rtl_obj_cache* strings; |
---|
| 841 | rtems_rtl_obj_sect* strtab; |
---|
| 842 | int locals; |
---|
| 843 | int local_string_space; |
---|
| 844 | rtems_rtl_obj_sym* lsym; |
---|
| 845 | char* lstring; |
---|
| 846 | int globals; |
---|
| 847 | int global_string_space; |
---|
| 848 | rtems_rtl_obj_sym* gsym; |
---|
| 849 | char* gstring; |
---|
[803eac9] | 850 | size_t common_offset; |
---|
[f59d435d] | 851 | int sym; |
---|
[ae5fe7e6] | 852 | |
---|
| 853 | strtab = rtems_rtl_obj_find_section (obj, ".strtab"); |
---|
| 854 | if (!strtab) |
---|
| 855 | { |
---|
| 856 | rtems_rtl_set_error (EINVAL, "no .strtab section"); |
---|
| 857 | return false; |
---|
| 858 | } |
---|
| 859 | |
---|
| 860 | rtems_rtl_obj_caches (&symbols, &strings, NULL); |
---|
| 861 | |
---|
| 862 | if (!symbols || !strings) |
---|
| 863 | return false; |
---|
| 864 | |
---|
| 865 | /* |
---|
| 866 | * Find the number of globals and the amount of string space |
---|
| 867 | * needed. Also check for duplicate symbols. |
---|
| 868 | */ |
---|
| 869 | |
---|
[a2e1e30d] | 870 | globals = 0; |
---|
| 871 | global_string_space = 0; |
---|
| 872 | locals = 0; |
---|
| 873 | local_string_space = 0; |
---|
[ae5fe7e6] | 874 | |
---|
| 875 | for (sym = 0; sym < (sect->size / sizeof (Elf_Sym)); ++sym) |
---|
| 876 | { |
---|
| 877 | Elf_Sym symbol; |
---|
| 878 | off_t off; |
---|
| 879 | const char* name; |
---|
| 880 | size_t len; |
---|
| 881 | |
---|
| 882 | off = obj->ooffset + sect->offset + (sym * sizeof (symbol)); |
---|
| 883 | |
---|
| 884 | if (!rtems_rtl_obj_cache_read_byval (symbols, fd, off, |
---|
| 885 | &symbol, sizeof (symbol))) |
---|
| 886 | return false; |
---|
| 887 | |
---|
| 888 | off = obj->ooffset + strtab->offset + symbol.st_name; |
---|
| 889 | len = RTEMS_RTL_ELF_STRING_MAX; |
---|
| 890 | |
---|
| 891 | if (!rtems_rtl_obj_cache_read (strings, fd, off, (void**) &name, &len)) |
---|
| 892 | return false; |
---|
| 893 | |
---|
| 894 | /* |
---|
[a2e1e30d] | 895 | * Only keep the functions and global or weak symbols so place them in a |
---|
| 896 | * separate table to local symbols. Local symbols are not needed after the |
---|
| 897 | * object file has been loaded. Undefined symbols are NOTYPE so for locals |
---|
| 898 | * we need to make sure there is a valid seciton. |
---|
[ae5fe7e6] | 899 | */ |
---|
[803eac9] | 900 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_SYMBOL)) |
---|
[74883be5] | 901 | printf ("rtl: sym:elf:%-4d name:%-4d: %-20s: bind:%-2d:%-12s " \ |
---|
| 902 | "type:%-2d:%-10s sect:%-5d size:%-5d value:%d\n", |
---|
[803eac9] | 903 | sym, (int) symbol.st_name, name, |
---|
| 904 | (int) ELF_ST_BIND (symbol.st_info), |
---|
[74883be5] | 905 | rtems_rtl_elf_sym_bind_label (symbol.st_info), |
---|
[803eac9] | 906 | (int) ELF_ST_TYPE (symbol.st_info), |
---|
[74883be5] | 907 | rtems_rtl_elf_sym_type_label (symbol.st_info), |
---|
[803eac9] | 908 | symbol.st_shndx, |
---|
[b36c5209] | 909 | (int) symbol.st_size, |
---|
| 910 | (int) symbol.st_value); |
---|
[803eac9] | 911 | |
---|
[b36c5209] | 912 | /* |
---|
| 913 | * If a duplicate forget it. |
---|
| 914 | */ |
---|
| 915 | if (rtems_rtl_symbol_global_find (name)) |
---|
| 916 | continue; |
---|
[194eb403] | 917 | |
---|
[a2e1e30d] | 918 | if ((symbol.st_shndx != 0) && |
---|
| 919 | ((ELF_ST_TYPE (symbol.st_info) == STT_OBJECT) || |
---|
[803eac9] | 920 | (ELF_ST_TYPE (symbol.st_info) == STT_COMMON) || |
---|
[a2e1e30d] | 921 | (ELF_ST_TYPE (symbol.st_info) == STT_FUNC) || |
---|
| 922 | (ELF_ST_TYPE (symbol.st_info) == STT_NOTYPE))) |
---|
[ae5fe7e6] | 923 | { |
---|
[803eac9] | 924 | /* |
---|
| 925 | * There needs to be a valid section for the symbol. |
---|
| 926 | */ |
---|
[f59d435d] | 927 | rtems_rtl_obj_sect* symsect; |
---|
[a2e1e30d] | 928 | |
---|
| 929 | symsect = rtems_rtl_obj_find_section_by_index (obj, symbol.st_shndx); |
---|
[803eac9] | 930 | if (symsect != NULL) |
---|
[ae5fe7e6] | 931 | { |
---|
[a2e1e30d] | 932 | if ((ELF_ST_BIND (symbol.st_info) == STB_GLOBAL) || |
---|
| 933 | (ELF_ST_BIND (symbol.st_info) == STB_WEAK)) |
---|
[ae5fe7e6] | 934 | { |
---|
[a2e1e30d] | 935 | /* |
---|
| 936 | * If there is a globally exported symbol already present and this |
---|
[194eb403] | 937 | * symbol is not weak raise check if the object file being loaded is |
---|
| 938 | * from an archive. If the base image is built with text sections a |
---|
| 939 | * symbol with it's section will be linked into the base image and not |
---|
| 940 | * another symbol. If not an archive rause an error. |
---|
| 941 | * |
---|
| 942 | * If the symbol is weak and present globally ignore this symbol and |
---|
| 943 | * use the global one and if it is not present take this symbol global |
---|
| 944 | * or weak. We accept the first weak symbol we find and make it |
---|
| 945 | * globally exported. |
---|
[a2e1e30d] | 946 | */ |
---|
| 947 | if (rtems_rtl_symbol_global_find (name) && |
---|
| 948 | (ELF_ST_BIND (symbol.st_info) != STB_WEAK)) |
---|
| 949 | { |
---|
[194eb403] | 950 | if (!rtems_rtl_obj_aname_valid (obj)) |
---|
| 951 | { |
---|
| 952 | rtems_rtl_set_error (ENOMEM, "duplicate global symbol: %s", name); |
---|
| 953 | return false; |
---|
| 954 | } |
---|
[a2e1e30d] | 955 | } |
---|
| 956 | else |
---|
| 957 | { |
---|
[803eac9] | 958 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_SYMBOL)) |
---|
[b36c5209] | 959 | printf ("rtl: sym:elf:%-4d name:%-4d: %-20s: global\n", |
---|
[803eac9] | 960 | sym, (int) symbol.st_name, name); |
---|
[a2e1e30d] | 961 | ++globals; |
---|
| 962 | global_string_space += strlen (name) + 1; |
---|
| 963 | } |
---|
[ae5fe7e6] | 964 | } |
---|
[a2e1e30d] | 965 | else if (ELF_ST_BIND (symbol.st_info) == STB_LOCAL) |
---|
[ae5fe7e6] | 966 | { |
---|
[803eac9] | 967 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_SYMBOL)) |
---|
[b36c5209] | 968 | printf ("rtl: sym:elf:%-4d name:%-4d: %-20s: local\n", |
---|
[803eac9] | 969 | sym, (int) symbol.st_name, name); |
---|
[a2e1e30d] | 970 | ++locals; |
---|
| 971 | local_string_space += strlen (name) + 1; |
---|
[ae5fe7e6] | 972 | } |
---|
| 973 | } |
---|
| 974 | } |
---|
| 975 | } |
---|
| 976 | |
---|
[a2e1e30d] | 977 | if (locals) |
---|
[ae5fe7e6] | 978 | { |
---|
[f59d435d] | 979 | obj->local_size = locals * sizeof (rtems_rtl_obj_sym) + local_string_space; |
---|
[a2e1e30d] | 980 | obj->local_table = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_SYMBOL, |
---|
| 981 | obj->local_size, true); |
---|
| 982 | if (!obj->local_table) |
---|
| 983 | { |
---|
| 984 | obj->local_size = 0; |
---|
| 985 | rtems_rtl_set_error (ENOMEM, "no memory for obj local syms"); |
---|
| 986 | return false; |
---|
| 987 | } |
---|
| 988 | |
---|
| 989 | obj->local_syms = locals; |
---|
| 990 | } |
---|
[ae5fe7e6] | 991 | |
---|
[a2e1e30d] | 992 | if (globals) |
---|
| 993 | { |
---|
[f59d435d] | 994 | obj->global_size = globals * sizeof (rtems_rtl_obj_sym) + global_string_space; |
---|
[ae5fe7e6] | 995 | obj->global_table = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_SYMBOL, |
---|
| 996 | obj->global_size, true); |
---|
| 997 | if (!obj->global_table) |
---|
| 998 | { |
---|
[a2e1e30d] | 999 | if (locals) |
---|
| 1000 | { |
---|
| 1001 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_SYMBOL, obj->local_table); |
---|
| 1002 | obj->local_size = 0; |
---|
| 1003 | obj->local_syms = 0; |
---|
| 1004 | } |
---|
[ae5fe7e6] | 1005 | obj->global_size = 0; |
---|
| 1006 | rtems_rtl_set_error (ENOMEM, "no memory for obj global syms"); |
---|
| 1007 | return false; |
---|
| 1008 | } |
---|
| 1009 | |
---|
| 1010 | obj->global_syms = globals; |
---|
[a2e1e30d] | 1011 | } |
---|
[ae5fe7e6] | 1012 | |
---|
[a2e1e30d] | 1013 | lsym = obj->local_table; |
---|
| 1014 | lstring = |
---|
[f59d435d] | 1015 | (((char*) obj->local_table) + (locals * sizeof (rtems_rtl_obj_sym))); |
---|
[a2e1e30d] | 1016 | gsym = obj->global_table; |
---|
| 1017 | gstring = |
---|
[f59d435d] | 1018 | (((char*) obj->global_table) + (globals * sizeof (rtems_rtl_obj_sym))); |
---|
[a2e1e30d] | 1019 | |
---|
[803eac9] | 1020 | common_offset = 0; |
---|
| 1021 | |
---|
[a2e1e30d] | 1022 | for (sym = 0; sym < (sect->size / sizeof (Elf_Sym)); ++sym) |
---|
| 1023 | { |
---|
[194eb403] | 1024 | Elf_Sym symbol; |
---|
| 1025 | off_t off; |
---|
| 1026 | size_t len; |
---|
[ae5fe7e6] | 1027 | |
---|
[a2e1e30d] | 1028 | off = obj->ooffset + sect->offset + (sym * sizeof (symbol)); |
---|
[ae5fe7e6] | 1029 | |
---|
[a2e1e30d] | 1030 | if (!rtems_rtl_obj_cache_read_byval (symbols, fd, off, |
---|
| 1031 | &symbol, sizeof (symbol))) |
---|
| 1032 | { |
---|
[b36c5209] | 1033 | if (obj->local_syms) |
---|
[ae5fe7e6] | 1034 | { |
---|
[a2e1e30d] | 1035 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_SYMBOL, obj->local_table); |
---|
| 1036 | obj->local_table = NULL; |
---|
| 1037 | obj->local_size = 0; |
---|
| 1038 | obj->local_syms = 0; |
---|
| 1039 | } |
---|
[b36c5209] | 1040 | if (obj->global_syms) |
---|
[a2e1e30d] | 1041 | { |
---|
| 1042 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_SYMBOL, obj->global_table); |
---|
[ae5fe7e6] | 1043 | obj->global_table = NULL; |
---|
| 1044 | obj->global_syms = 0; |
---|
| 1045 | obj->global_size = 0; |
---|
| 1046 | } |
---|
[a2e1e30d] | 1047 | return false; |
---|
| 1048 | } |
---|
[ae5fe7e6] | 1049 | |
---|
[a2e1e30d] | 1050 | if ((symbol.st_shndx != 0) && |
---|
| 1051 | ((ELF_ST_TYPE (symbol.st_info) == STT_OBJECT) || |
---|
[803eac9] | 1052 | (ELF_ST_TYPE (symbol.st_info) == STT_COMMON) || |
---|
[a2e1e30d] | 1053 | (ELF_ST_TYPE (symbol.st_info) == STT_FUNC) || |
---|
| 1054 | (ELF_ST_TYPE (symbol.st_info) == STT_NOTYPE)) && |
---|
| 1055 | ((ELF_ST_BIND (symbol.st_info) == STB_GLOBAL) || |
---|
| 1056 | (ELF_ST_BIND (symbol.st_info) == STB_WEAK) || |
---|
| 1057 | (ELF_ST_BIND (symbol.st_info) == STB_LOCAL))) |
---|
[194eb403] | 1058 | { |
---|
[74883be5] | 1059 | rtems_rtl_obj_sect* symsect; |
---|
[b36c5209] | 1060 | |
---|
| 1061 | /* |
---|
[74883be5] | 1062 | * There needs to be a valid section for the symbol. |
---|
[b36c5209] | 1063 | */ |
---|
[74883be5] | 1064 | symsect = rtems_rtl_obj_find_section_by_index (obj, symbol.st_shndx); |
---|
[b36c5209] | 1065 | |
---|
[74883be5] | 1066 | if (symsect != NULL) |
---|
[ae5fe7e6] | 1067 | { |
---|
[74883be5] | 1068 | rtems_rtl_obj_sym* osym; |
---|
| 1069 | char* string; |
---|
| 1070 | Elf_Word value; |
---|
| 1071 | const char* name; |
---|
[a2e1e30d] | 1072 | |
---|
[74883be5] | 1073 | off = obj->ooffset + strtab->offset + symbol.st_name; |
---|
| 1074 | len = RTEMS_RTL_ELF_STRING_MAX; |
---|
[a2e1e30d] | 1075 | |
---|
[74883be5] | 1076 | if (!rtems_rtl_obj_cache_read (strings, fd, off, (void**) &name, &len)) |
---|
| 1077 | return false; |
---|
[803eac9] | 1078 | |
---|
[74883be5] | 1079 | /* |
---|
| 1080 | * If a duplicate forget it. |
---|
| 1081 | */ |
---|
| 1082 | if (rtems_rtl_symbol_global_find (name)) |
---|
| 1083 | continue; |
---|
| 1084 | |
---|
| 1085 | if ((ELF_ST_BIND (symbol.st_info) == STB_GLOBAL) || |
---|
| 1086 | (ELF_ST_BIND (symbol.st_info) == STB_WEAK)) |
---|
| 1087 | { |
---|
| 1088 | size_t slen = strlen (name) + 1; |
---|
| 1089 | if ((gstring + slen) > (char*) obj->global_table + obj->global_size) |
---|
| 1090 | string = NULL; |
---|
| 1091 | else |
---|
| 1092 | { |
---|
| 1093 | osym = gsym; |
---|
| 1094 | string = gstring; |
---|
[d0f627d] | 1095 | gstring += slen; |
---|
[74883be5] | 1096 | ++gsym; |
---|
| 1097 | } |
---|
| 1098 | } |
---|
| 1099 | else |
---|
| 1100 | { |
---|
| 1101 | size_t slen = strlen (name) + 1; |
---|
| 1102 | if ((lstring + slen) > (char*) obj->local_table + obj->local_size) |
---|
| 1103 | string = NULL; |
---|
| 1104 | else |
---|
| 1105 | { |
---|
| 1106 | osym = lsym; |
---|
| 1107 | string = lstring; |
---|
[d0f627d] | 1108 | lstring += slen; |
---|
[74883be5] | 1109 | ++lsym; |
---|
| 1110 | } |
---|
| 1111 | } |
---|
| 1112 | |
---|
| 1113 | /* |
---|
| 1114 | * See if the loading has overflowed the allocated tables. |
---|
| 1115 | */ |
---|
| 1116 | if (string == NULL) |
---|
| 1117 | { |
---|
| 1118 | if (obj->local_syms) |
---|
| 1119 | { |
---|
| 1120 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_SYMBOL, obj->local_table); |
---|
| 1121 | obj->local_table = NULL; |
---|
| 1122 | obj->local_size = 0; |
---|
| 1123 | obj->local_syms = 0; |
---|
| 1124 | } |
---|
| 1125 | if (obj->global_syms) |
---|
| 1126 | { |
---|
| 1127 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_SYMBOL, obj->global_table); |
---|
| 1128 | obj->global_table = NULL; |
---|
| 1129 | obj->global_syms = 0; |
---|
| 1130 | obj->global_size = 0; |
---|
| 1131 | } |
---|
| 1132 | rtems_rtl_set_error (ENOMEM, "syms overlow, parsing/loading size mismatch"); |
---|
| 1133 | return false; |
---|
| 1134 | } |
---|
| 1135 | |
---|
| 1136 | /* |
---|
| 1137 | * Allocate any common symbols in the common section. |
---|
| 1138 | */ |
---|
| 1139 | if (symbol.st_shndx == SHN_COMMON) |
---|
| 1140 | { |
---|
| 1141 | size_t value_off = rtems_rtl_obj_align (common_offset, |
---|
| 1142 | symbol.st_value); |
---|
| 1143 | common_offset = value_off + symbol.st_size; |
---|
| 1144 | value = value_off; |
---|
| 1145 | } |
---|
| 1146 | else |
---|
| 1147 | { |
---|
| 1148 | value = symbol.st_value; |
---|
| 1149 | } |
---|
| 1150 | |
---|
| 1151 | rtems_chain_set_off_chain (&osym->node); |
---|
| 1152 | memcpy (string, name, strlen (name) + 1); |
---|
| 1153 | osym->name = string; |
---|
| 1154 | osym->value = (uint8_t*) value; |
---|
| 1155 | osym->data = symbol.st_shndx; |
---|
| 1156 | |
---|
| 1157 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_SYMBOL)) |
---|
| 1158 | printf ("rtl: sym:add:%-4d name:%-4d: %-20s: bind:%-2d " \ |
---|
| 1159 | "type:%-2d val:%-8p sect:%-3d size:%d\n", |
---|
| 1160 | sym, (int) symbol.st_name, osym->name, |
---|
| 1161 | (int) ELF_ST_BIND (symbol.st_info), |
---|
| 1162 | (int) ELF_ST_TYPE (symbol.st_info), |
---|
| 1163 | osym->value, symbol.st_shndx, |
---|
| 1164 | (int) symbol.st_size); |
---|
| 1165 | } |
---|
[b36c5209] | 1166 | } |
---|
| 1167 | } |
---|
[a2e1e30d] | 1168 | |
---|
[b36c5209] | 1169 | return true; |
---|
| 1170 | } |
---|
[194eb403] | 1171 | |
---|
[b36c5209] | 1172 | static bool |
---|
| 1173 | rtems_rtl_elf_symbols_locate (rtems_rtl_obj* obj, |
---|
| 1174 | int fd, |
---|
| 1175 | rtems_rtl_obj_sect* sect, |
---|
| 1176 | void* data) |
---|
| 1177 | { |
---|
| 1178 | int sym; |
---|
[194eb403] | 1179 | |
---|
[b36c5209] | 1180 | for (sym = 0; sym < obj->local_syms; ++sym) |
---|
| 1181 | { |
---|
| 1182 | rtems_rtl_obj_sym* osym = &obj->local_table[sym]; |
---|
| 1183 | rtems_rtl_obj_sect* symsect; |
---|
| 1184 | symsect = rtems_rtl_obj_find_section_by_index (obj, osym->data); |
---|
| 1185 | if (symsect) |
---|
| 1186 | { |
---|
| 1187 | osym->value += (intptr_t) symsect->base; |
---|
| 1188 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_SYMBOL)) |
---|
| 1189 | printf ("rtl: sym:locate:local :%-4d name: %-20s val:%-8p sect:%-3d (%s, %p)\n", |
---|
| 1190 | sym, osym->name, osym->value, osym->data, |
---|
| 1191 | symsect->name, symsect->base); |
---|
| 1192 | } |
---|
| 1193 | } |
---|
[194eb403] | 1194 | |
---|
[b36c5209] | 1195 | for (sym = 0; sym < obj->global_syms; ++sym) |
---|
| 1196 | { |
---|
| 1197 | rtems_rtl_obj_sym* osym = &obj->global_table[sym]; |
---|
| 1198 | rtems_rtl_obj_sect* symsect; |
---|
| 1199 | symsect = rtems_rtl_obj_find_section_by_index (obj, osym->data); |
---|
| 1200 | if (symsect) |
---|
| 1201 | { |
---|
| 1202 | osym->value += (intptr_t) symsect->base; |
---|
[194eb403] | 1203 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_SYMBOL)) |
---|
[b36c5209] | 1204 | printf ("rtl: sym:locate:global:%-4d name: %-20s val:%-8p sect:%-3d (%s, %p)\n", |
---|
| 1205 | sym, osym->name, osym->value, osym->data, |
---|
| 1206 | symsect->name, symsect->base); |
---|
[ae5fe7e6] | 1207 | } |
---|
[a2e1e30d] | 1208 | } |
---|
[ae5fe7e6] | 1209 | |
---|
[b36c5209] | 1210 | if (obj->global_size) |
---|
[ae5fe7e6] | 1211 | rtems_rtl_symbol_obj_add (obj); |
---|
| 1212 | |
---|
| 1213 | return true; |
---|
| 1214 | } |
---|
| 1215 | |
---|
[6c9f017] | 1216 | static bool |
---|
| 1217 | rtems_rtl_elf_arch_alloc (rtems_rtl_obj* obj, |
---|
| 1218 | int fd, |
---|
| 1219 | rtems_rtl_obj_sect* sect, |
---|
| 1220 | void* data) |
---|
| 1221 | { |
---|
| 1222 | if (rtems_rtl_obj_sect_is_arch_alloc (sect)) |
---|
| 1223 | return rtems_rtl_elf_arch_section_alloc (obj, sect); |
---|
| 1224 | return true; |
---|
| 1225 | } |
---|
| 1226 | |
---|
| 1227 | static bool |
---|
| 1228 | rtems_rtl_elf_arch_free (rtems_rtl_obj* obj) |
---|
| 1229 | { |
---|
| 1230 | int index = -1; |
---|
| 1231 | while (true) |
---|
| 1232 | { |
---|
| 1233 | rtems_rtl_obj_sect* sect; |
---|
| 1234 | sect = rtems_rtl_obj_find_section_by_mask (obj, |
---|
| 1235 | index, |
---|
| 1236 | RTEMS_RTL_OBJ_SECT_ARCH_ALLOC); |
---|
| 1237 | if (sect == NULL) |
---|
| 1238 | break; |
---|
| 1239 | if (!rtems_rtl_elf_arch_section_free (obj, sect)) |
---|
| 1240 | return false; |
---|
| 1241 | index = sect->section; |
---|
| 1242 | } |
---|
| 1243 | return true; |
---|
| 1244 | } |
---|
| 1245 | |
---|
[ae5fe7e6] | 1246 | static bool |
---|
[f59d435d] | 1247 | rtems_rtl_elf_loader (rtems_rtl_obj* obj, |
---|
| 1248 | int fd, |
---|
| 1249 | rtems_rtl_obj_sect* sect, |
---|
| 1250 | void* data) |
---|
[ae5fe7e6] | 1251 | { |
---|
| 1252 | uint8_t* base_offset; |
---|
| 1253 | size_t len; |
---|
| 1254 | |
---|
| 1255 | if (lseek (fd, obj->ooffset + sect->offset, SEEK_SET) < 0) |
---|
| 1256 | { |
---|
| 1257 | rtems_rtl_set_error (errno, "section load seek failed"); |
---|
| 1258 | return false; |
---|
| 1259 | } |
---|
| 1260 | |
---|
| 1261 | base_offset = sect->base; |
---|
| 1262 | len = sect->size; |
---|
| 1263 | |
---|
| 1264 | while (len) |
---|
| 1265 | { |
---|
| 1266 | ssize_t r = read (fd, base_offset, len); |
---|
| 1267 | if (r <= 0) |
---|
| 1268 | { |
---|
| 1269 | rtems_rtl_set_error (errno, "section load read failed"); |
---|
| 1270 | return false; |
---|
| 1271 | } |
---|
| 1272 | base_offset += r; |
---|
| 1273 | len -= r; |
---|
| 1274 | } |
---|
| 1275 | |
---|
| 1276 | return true; |
---|
| 1277 | } |
---|
| 1278 | |
---|
| 1279 | static bool |
---|
[f59d435d] | 1280 | rtems_rtl_elf_parse_sections (rtems_rtl_obj* obj, int fd, Elf_Ehdr* ehdr) |
---|
[ae5fe7e6] | 1281 | { |
---|
[f59d435d] | 1282 | rtems_rtl_obj_cache* sects; |
---|
| 1283 | rtems_rtl_obj_cache* strings; |
---|
| 1284 | int section; |
---|
| 1285 | off_t sectstroff; |
---|
| 1286 | off_t off; |
---|
| 1287 | Elf_Shdr shdr; |
---|
[ae5fe7e6] | 1288 | |
---|
| 1289 | rtems_rtl_obj_caches (§s, &strings, NULL); |
---|
| 1290 | |
---|
| 1291 | if (!sects || !strings) |
---|
| 1292 | return false; |
---|
| 1293 | |
---|
| 1294 | /* |
---|
| 1295 | * Get the offset to the section string table. |
---|
| 1296 | */ |
---|
| 1297 | off = obj->ooffset + ehdr->e_shoff + (ehdr->e_shstrndx * ehdr->e_shentsize); |
---|
| 1298 | |
---|
| 1299 | if (!rtems_rtl_obj_cache_read_byval (sects, fd, off, &shdr, sizeof (shdr))) |
---|
| 1300 | return false; |
---|
| 1301 | |
---|
| 1302 | if (shdr.sh_type != SHT_STRTAB) |
---|
| 1303 | { |
---|
| 1304 | rtems_rtl_set_error (EINVAL, "bad .sectstr section type"); |
---|
| 1305 | return false; |
---|
| 1306 | } |
---|
| 1307 | |
---|
| 1308 | sectstroff = obj->ooffset + shdr.sh_offset; |
---|
| 1309 | |
---|
| 1310 | for (section = 0; section < ehdr->e_shnum; ++section) |
---|
| 1311 | { |
---|
[194eb403] | 1312 | char* name; |
---|
| 1313 | size_t len; |
---|
[ae5fe7e6] | 1314 | uint32_t flags; |
---|
| 1315 | |
---|
[580466c] | 1316 | /* |
---|
| 1317 | * Make sure section is at least 32bits to avoid 16-bit overflow errors. |
---|
| 1318 | */ |
---|
[fc523ac8] | 1319 | off = obj->ooffset + ehdr->e_shoff + (((uint32_t) section) * ehdr->e_shentsize); |
---|
[ae5fe7e6] | 1320 | |
---|
[75386e11] | 1321 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_DETAIL)) |
---|
| 1322 | printf ("rtl: section header: %2d: offset=%d\n", section, (int) off); |
---|
| 1323 | |
---|
[ae5fe7e6] | 1324 | if (!rtems_rtl_obj_cache_read_byval (sects, fd, off, &shdr, sizeof (shdr))) |
---|
| 1325 | return false; |
---|
| 1326 | |
---|
[194eb403] | 1327 | len = RTEMS_RTL_ELF_STRING_MAX; |
---|
| 1328 | if (!rtems_rtl_obj_cache_read (strings, fd, |
---|
| 1329 | sectstroff + shdr.sh_name, |
---|
| 1330 | (void**) &name, &len)) |
---|
| 1331 | return false; |
---|
| 1332 | |
---|
[bba48d9] | 1333 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_DETAIL)) |
---|
[194eb403] | 1334 | printf ("rtl: section: %2d: name=%s type=%d flags=%08x link=%d info=%d\n", |
---|
| 1335 | section, name, (int) shdr.sh_type, (unsigned int) shdr.sh_flags, |
---|
[bba48d9] | 1336 | (int) shdr.sh_link, (int) shdr.sh_info); |
---|
| 1337 | |
---|
[803eac9] | 1338 | flags = 0; |
---|
| 1339 | |
---|
[ae5fe7e6] | 1340 | switch (shdr.sh_type) |
---|
| 1341 | { |
---|
| 1342 | case SHT_NULL: |
---|
| 1343 | /* |
---|
| 1344 | * Ignore. |
---|
| 1345 | */ |
---|
| 1346 | break; |
---|
| 1347 | |
---|
| 1348 | case SHT_PROGBITS: |
---|
| 1349 | /* |
---|
| 1350 | * There are 2 program bits sections. One is the program text and the |
---|
| 1351 | * other is the program data. The program text is flagged |
---|
| 1352 | * alloc/executable and the program data is flagged alloc/writable. |
---|
| 1353 | */ |
---|
| 1354 | if ((shdr.sh_flags & SHF_ALLOC) == SHF_ALLOC) |
---|
| 1355 | { |
---|
| 1356 | if ((shdr.sh_flags & SHF_EXECINSTR) == SHF_EXECINSTR) |
---|
| 1357 | flags = RTEMS_RTL_OBJ_SECT_TEXT | RTEMS_RTL_OBJ_SECT_LOAD; |
---|
| 1358 | else if ((shdr.sh_flags & SHF_WRITE) == SHF_WRITE) |
---|
| 1359 | flags = RTEMS_RTL_OBJ_SECT_DATA | RTEMS_RTL_OBJ_SECT_LOAD; |
---|
| 1360 | else |
---|
| 1361 | flags = RTEMS_RTL_OBJ_SECT_CONST | RTEMS_RTL_OBJ_SECT_LOAD; |
---|
| 1362 | } |
---|
| 1363 | break; |
---|
| 1364 | |
---|
| 1365 | case SHT_NOBITS: |
---|
| 1366 | /* |
---|
| 1367 | * There is 1 NOBIT section which is the .bss section. There is nothing |
---|
| 1368 | * but a definition as the .bss is just a clear region of memory. |
---|
| 1369 | */ |
---|
| 1370 | if ((shdr.sh_flags & (SHF_ALLOC | SHF_WRITE)) == (SHF_ALLOC | SHF_WRITE)) |
---|
| 1371 | flags = RTEMS_RTL_OBJ_SECT_BSS | RTEMS_RTL_OBJ_SECT_ZERO; |
---|
| 1372 | break; |
---|
| 1373 | |
---|
| 1374 | case SHT_RELA: |
---|
[194eb403] | 1375 | flags = RTEMS_RTL_OBJ_SECT_RELA | RTEMS_RTL_OBJ_SECT_LOAD; |
---|
[ae5fe7e6] | 1376 | break; |
---|
| 1377 | |
---|
| 1378 | case SHT_REL: |
---|
| 1379 | /* |
---|
| 1380 | * The sh_link holds the section index for the symbol table. The sh_info |
---|
| 1381 | * holds the section index the relocations apply to. |
---|
| 1382 | */ |
---|
[194eb403] | 1383 | flags = RTEMS_RTL_OBJ_SECT_REL | RTEMS_RTL_OBJ_SECT_LOAD; |
---|
[ae5fe7e6] | 1384 | break; |
---|
| 1385 | |
---|
| 1386 | case SHT_SYMTAB: |
---|
| 1387 | flags = RTEMS_RTL_OBJ_SECT_SYM; |
---|
| 1388 | break; |
---|
| 1389 | |
---|
| 1390 | case SHT_STRTAB: |
---|
| 1391 | flags = RTEMS_RTL_OBJ_SECT_STR; |
---|
| 1392 | break; |
---|
| 1393 | |
---|
[4408603] | 1394 | case SHT_INIT_ARRAY: |
---|
| 1395 | /* |
---|
| 1396 | * Constructors are text and need to be loaded. |
---|
| 1397 | */ |
---|
| 1398 | flags = (RTEMS_RTL_OBJ_SECT_CTOR | |
---|
| 1399 | RTEMS_RTL_OBJ_SECT_TEXT | |
---|
| 1400 | RTEMS_RTL_OBJ_SECT_LOAD); |
---|
| 1401 | break; |
---|
| 1402 | |
---|
| 1403 | case SHT_FINI_ARRAY: |
---|
| 1404 | /* |
---|
| 1405 | * Destructors are text and need to be loaded. |
---|
| 1406 | */ |
---|
| 1407 | flags = (RTEMS_RTL_OBJ_SECT_DTOR | |
---|
| 1408 | RTEMS_RTL_OBJ_SECT_TEXT | |
---|
| 1409 | RTEMS_RTL_OBJ_SECT_LOAD); |
---|
| 1410 | break; |
---|
| 1411 | |
---|
[ae5fe7e6] | 1412 | default: |
---|
[c6eead1] | 1413 | /* |
---|
[bba48d9] | 1414 | * See if there are architecture specific flags? |
---|
[c6eead1] | 1415 | */ |
---|
| 1416 | flags = rtems_rtl_elf_section_flags (obj, &shdr); |
---|
| 1417 | if (flags == 0) |
---|
| 1418 | { |
---|
| 1419 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_WARNING)) |
---|
| 1420 | printf ("rtl: unsupported section: %2d: type=%02d flags=%02x\n", |
---|
| 1421 | section, (int) shdr.sh_type, (int) shdr.sh_flags); |
---|
| 1422 | } |
---|
[ae5fe7e6] | 1423 | break; |
---|
| 1424 | } |
---|
| 1425 | |
---|
| 1426 | if (flags != 0) |
---|
| 1427 | { |
---|
[194eb403] | 1428 | /* |
---|
| 1429 | * If the object file is part of a library check the section's name. If it |
---|
| 1430 | * starts with '.text.*' see if the last part is a global symbol. If a |
---|
| 1431 | * global symbol exists we have to assume the symbol in the archive is a |
---|
| 1432 | * duplicate can can be ignored. |
---|
| 1433 | */ |
---|
| 1434 | if (rtems_rtl_obj_aname_valid (obj)) |
---|
| 1435 | { |
---|
| 1436 | const char* symname = rtems_rtl_elf_separated_section (name); |
---|
| 1437 | if (symname != NULL && rtems_rtl_symbol_global_find (symname)) |
---|
| 1438 | flags &= ~RTEMS_RTL_OBJ_SECT_LOAD; |
---|
| 1439 | } |
---|
[ae5fe7e6] | 1440 | |
---|
[bba48d9] | 1441 | /* |
---|
| 1442 | * If link ordering this section must appear in the same order in memory |
---|
| 1443 | * as the linked-to section relative to the sections it loads with. |
---|
| 1444 | */ |
---|
| 1445 | if ((shdr.sh_flags & SHF_LINK_ORDER) != 0) |
---|
| 1446 | flags |= RTEMS_RTL_OBJ_SECT_LINK; |
---|
| 1447 | |
---|
[4408603] | 1448 | /* |
---|
[194eb403] | 1449 | * Some architexctures have a named PROGBIT section for INIT/FINI. |
---|
[4408603] | 1450 | */ |
---|
[ae5fe7e6] | 1451 | if (strcmp (".ctors", name) == 0) |
---|
| 1452 | flags |= RTEMS_RTL_OBJ_SECT_CTOR; |
---|
| 1453 | if (strcmp (".dtors", name) == 0) |
---|
| 1454 | flags |= RTEMS_RTL_OBJ_SECT_DTOR; |
---|
| 1455 | |
---|
[c6eead1] | 1456 | if (rtems_rtl_elf_unwind_parse (obj, name, flags)) |
---|
| 1457 | { |
---|
| 1458 | flags &= ~(RTEMS_RTL_OBJ_SECT_TEXT | RTEMS_RTL_OBJ_SECT_CONST); |
---|
| 1459 | flags |= RTEMS_RTL_OBJ_SECT_EH; |
---|
| 1460 | } |
---|
| 1461 | |
---|
[6c9f017] | 1462 | /* |
---|
| 1463 | * Architecture specific parsing. Modified or extends the flags. |
---|
| 1464 | */ |
---|
| 1465 | flags = rtems_rtl_elf_arch_parse_section (obj, section, name, &shdr, flags); |
---|
| 1466 | if (flags == 0) |
---|
| 1467 | { |
---|
| 1468 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_WARNING)) |
---|
| 1469 | printf ("rtl: unsupported section: %2d: type=%02d flags=%02x\n", |
---|
| 1470 | section, (int) shdr.sh_type, (int) shdr.sh_flags); |
---|
| 1471 | rtems_rtl_set_error (ENOMEM, "invalid architecture section: %s", name); |
---|
| 1472 | return false; |
---|
| 1473 | } |
---|
| 1474 | |
---|
| 1475 | /* |
---|
| 1476 | * Add the section. |
---|
| 1477 | */ |
---|
[ae5fe7e6] | 1478 | if (!rtems_rtl_obj_add_section (obj, section, name, |
---|
| 1479 | shdr.sh_size, shdr.sh_offset, |
---|
| 1480 | shdr.sh_addralign, shdr.sh_link, |
---|
| 1481 | shdr.sh_info, flags)) |
---|
| 1482 | return false; |
---|
| 1483 | } |
---|
| 1484 | } |
---|
| 1485 | |
---|
| 1486 | return true; |
---|
| 1487 | } |
---|
| 1488 | |
---|
[803eac9] | 1489 | static bool |
---|
| 1490 | rtems_rtl_elf_add_common (rtems_rtl_obj* obj, size_t size, uint32_t alignment) |
---|
| 1491 | { |
---|
| 1492 | if (size > 0) |
---|
| 1493 | { |
---|
| 1494 | if (!rtems_rtl_obj_add_section (obj, SHN_COMMON, ".common.rtems.rtl", |
---|
| 1495 | size, 0, alignment, 0, 0, |
---|
| 1496 | RTEMS_RTL_OBJ_SECT_BSS | RTEMS_RTL_OBJ_SECT_ZERO)) |
---|
| 1497 | return false; |
---|
| 1498 | } |
---|
| 1499 | return true; |
---|
| 1500 | } |
---|
| 1501 | |
---|
[ae5fe7e6] | 1502 | bool |
---|
[f59d435d] | 1503 | rtems_rtl_elf_file_check (rtems_rtl_obj* obj, int fd) |
---|
[ae5fe7e6] | 1504 | { |
---|
[f59d435d] | 1505 | rtems_rtl_obj_cache* header; |
---|
| 1506 | Elf_Ehdr ehdr; |
---|
[ae5fe7e6] | 1507 | |
---|
| 1508 | rtems_rtl_obj_caches (&header, NULL, NULL); |
---|
| 1509 | |
---|
| 1510 | if (!rtems_rtl_obj_cache_read_byval (header, fd, obj->ooffset, |
---|
| 1511 | &ehdr, sizeof (ehdr))) |
---|
| 1512 | return false; |
---|
| 1513 | |
---|
| 1514 | /* |
---|
| 1515 | * Check we have a valid ELF file. |
---|
| 1516 | */ |
---|
| 1517 | if ((memcmp (ELFMAG, ehdr.e_ident, SELFMAG) != 0) |
---|
| 1518 | || ehdr.e_ident[EI_CLASS] != ELFCLASS) |
---|
| 1519 | { |
---|
| 1520 | return false; |
---|
| 1521 | } |
---|
| 1522 | |
---|
| 1523 | if ((ehdr.e_ident[EI_VERSION] != EV_CURRENT) |
---|
| 1524 | || (ehdr.e_version != EV_CURRENT) |
---|
| 1525 | || (ehdr.e_ident[EI_DATA] != ELFDEFNNAME (MACHDEP_ENDIANNESS))) |
---|
| 1526 | { |
---|
| 1527 | return false; |
---|
| 1528 | } |
---|
| 1529 | |
---|
| 1530 | return true; |
---|
| 1531 | } |
---|
| 1532 | |
---|
[c6eead1] | 1533 | static bool |
---|
[f59d435d] | 1534 | rtems_rtl_elf_load_linkmap (rtems_rtl_obj* obj) |
---|
[ae5fe7e6] | 1535 | { |
---|
| 1536 | rtems_chain_control* sections = NULL; |
---|
| 1537 | rtems_chain_node* node = NULL; |
---|
| 1538 | int sec_num = 0; |
---|
[c6eead1] | 1539 | section_detail* sd; |
---|
[ae5fe7e6] | 1540 | int i = 0; |
---|
[194eb403] | 1541 | size_t m; |
---|
[ae5fe7e6] | 1542 | |
---|
[c6eead1] | 1543 | /* |
---|
[194eb403] | 1544 | * The section masks to add to the linkmap. |
---|
[c6eead1] | 1545 | */ |
---|
[194eb403] | 1546 | const uint32_t sect_mask[] = { |
---|
| 1547 | RTEMS_RTL_OBJ_SECT_TEXT | RTEMS_RTL_OBJ_SECT_LOAD, |
---|
| 1548 | RTEMS_RTL_OBJ_SECT_CONST | RTEMS_RTL_OBJ_SECT_LOAD, |
---|
| 1549 | RTEMS_RTL_OBJ_SECT_DATA | RTEMS_RTL_OBJ_SECT_LOAD, |
---|
| 1550 | RTEMS_RTL_OBJ_SECT_BSS |
---|
| 1551 | }; |
---|
| 1552 | const size_t sect_masks = sizeof (sect_mask) / sizeof (sect_mask[0]); |
---|
[ae5fe7e6] | 1553 | |
---|
[194eb403] | 1554 | /* |
---|
| 1555 | * Caculate the size of sections' name. |
---|
| 1556 | */ |
---|
| 1557 | for (m = 0; m < sect_masks; ++m) |
---|
[ae5fe7e6] | 1558 | { |
---|
| 1559 | sections = &obj->sections; |
---|
| 1560 | node = rtems_chain_first (sections); |
---|
| 1561 | while (!rtems_chain_is_tail (sections, node)) |
---|
| 1562 | { |
---|
[f59d435d] | 1563 | rtems_rtl_obj_sect* sect = (rtems_rtl_obj_sect*) node; |
---|
[194eb403] | 1564 | const uint32_t mask = sect_mask[m]; |
---|
| 1565 | if ((sect->size != 0) && ((sect->flags & mask) == mask)) |
---|
[ae5fe7e6] | 1566 | { |
---|
| 1567 | ++sec_num; |
---|
| 1568 | } |
---|
| 1569 | node = rtems_chain_next (node); |
---|
| 1570 | } |
---|
| 1571 | } |
---|
| 1572 | |
---|
| 1573 | obj->obj_num = 1; |
---|
[c6eead1] | 1574 | obj->linkmap = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_OBJECT, |
---|
| 1575 | sizeof(struct link_map) + |
---|
| 1576 | sec_num * sizeof (section_detail), true); |
---|
| 1577 | if (!obj->linkmap) |
---|
[ae5fe7e6] | 1578 | { |
---|
[c6eead1] | 1579 | rtems_rtl_set_error (ENOMEM, "no memory for obj linkmap"); |
---|
[ae5fe7e6] | 1580 | return false; |
---|
| 1581 | } |
---|
| 1582 | |
---|
[c6eead1] | 1583 | obj->linkmap->name = obj->oname; |
---|
| 1584 | obj->linkmap->sec_num = sec_num; |
---|
| 1585 | obj->linkmap->sec_detail = (section_detail*) (obj->linkmap + 1); |
---|
| 1586 | obj->linkmap->rpathlen = 0; |
---|
| 1587 | obj->linkmap->rpath = NULL; |
---|
| 1588 | obj->linkmap->l_next = NULL; |
---|
| 1589 | obj->linkmap->l_prev = NULL; |
---|
| 1590 | obj->linkmap->sec_addr[rap_text] = obj->text_base; |
---|
| 1591 | obj->linkmap->sec_addr[rap_const] = obj->const_base; |
---|
| 1592 | obj->linkmap->sec_addr[rap_data] = obj->data_base; |
---|
| 1593 | obj->linkmap->sec_addr[rap_bss] = obj->bss_base; |
---|
| 1594 | |
---|
| 1595 | sd = obj->linkmap->sec_detail; |
---|
[ae5fe7e6] | 1596 | sections = &obj->sections; |
---|
| 1597 | node = rtems_chain_first (sections); |
---|
[c6eead1] | 1598 | |
---|
[194eb403] | 1599 | for (m = 0; m < sect_masks; ++m) |
---|
[ae5fe7e6] | 1600 | { |
---|
| 1601 | sections = &obj->sections; |
---|
| 1602 | node = rtems_chain_first (sections); |
---|
| 1603 | while (!rtems_chain_is_tail (sections, node)) |
---|
| 1604 | { |
---|
[f59d435d] | 1605 | rtems_rtl_obj_sect* sect = (rtems_rtl_obj_sect*) node; |
---|
[194eb403] | 1606 | const uint32_t mask = sect_mask[m]; |
---|
[ae5fe7e6] | 1607 | |
---|
[194eb403] | 1608 | if ((sect->size != 0) && ((sect->flags & mask) == mask)) |
---|
[ae5fe7e6] | 1609 | { |
---|
| 1610 | sd[i].name = sect->name; |
---|
| 1611 | sd[i].size = sect->size; |
---|
[194eb403] | 1612 | if ((mask & RTEMS_RTL_OBJ_SECT_TEXT) != 0) |
---|
[ae5fe7e6] | 1613 | { |
---|
| 1614 | sd[i].rap_id = rap_text; |
---|
| 1615 | sd[i].offset = sect->base - obj->text_base; |
---|
| 1616 | } |
---|
[194eb403] | 1617 | if ((mask & RTEMS_RTL_OBJ_SECT_CONST) != 0) |
---|
[ae5fe7e6] | 1618 | { |
---|
| 1619 | sd[i].rap_id = rap_const; |
---|
| 1620 | sd[i].offset = sect->base - obj->const_base; |
---|
| 1621 | } |
---|
[194eb403] | 1622 | if ((mask & RTEMS_RTL_OBJ_SECT_DATA) != 0) |
---|
[ae5fe7e6] | 1623 | { |
---|
| 1624 | sd[i].rap_id = rap_data; |
---|
| 1625 | sd[i].offset = sect->base - obj->data_base; |
---|
| 1626 | } |
---|
[194eb403] | 1627 | if ((mask & RTEMS_RTL_OBJ_SECT_BSS) != 0) |
---|
[ae5fe7e6] | 1628 | { |
---|
| 1629 | sd[i].rap_id = rap_bss; |
---|
| 1630 | sd[i].offset = sect->base - obj->bss_base; |
---|
| 1631 | } |
---|
| 1632 | |
---|
| 1633 | ++i; |
---|
| 1634 | } |
---|
| 1635 | node = rtems_chain_next (node); |
---|
| 1636 | } |
---|
| 1637 | } |
---|
| 1638 | |
---|
| 1639 | return true; |
---|
| 1640 | } |
---|
| 1641 | |
---|
| 1642 | bool |
---|
[f59d435d] | 1643 | rtems_rtl_elf_file_load (rtems_rtl_obj* obj, int fd) |
---|
[ae5fe7e6] | 1644 | { |
---|
[803eac9] | 1645 | rtems_rtl_obj_cache* header; |
---|
| 1646 | Elf_Ehdr ehdr; |
---|
[03139d5b] | 1647 | rtems_rtl_elf_reloc_data relocs = { 0 }; |
---|
| 1648 | rtems_rtl_elf_common_data common = { 0 }; |
---|
[ae5fe7e6] | 1649 | |
---|
| 1650 | rtems_rtl_obj_caches (&header, NULL, NULL); |
---|
| 1651 | |
---|
| 1652 | if (!rtems_rtl_obj_cache_read_byval (header, fd, obj->ooffset, |
---|
| 1653 | &ehdr, sizeof (ehdr))) |
---|
| 1654 | return false; |
---|
| 1655 | |
---|
| 1656 | /* |
---|
| 1657 | * Check we have a valid ELF file. |
---|
| 1658 | */ |
---|
| 1659 | if ((memcmp (ELFMAG, ehdr.e_ident, SELFMAG) != 0) |
---|
| 1660 | || ehdr.e_ident[EI_CLASS] != ELFCLASS) |
---|
| 1661 | { |
---|
| 1662 | rtems_rtl_set_error (EINVAL, "invalid ELF file format"); |
---|
| 1663 | return false; |
---|
| 1664 | } |
---|
| 1665 | |
---|
| 1666 | if ((ehdr.e_ident[EI_VERSION] != EV_CURRENT) |
---|
| 1667 | || (ehdr.e_version != EV_CURRENT) |
---|
| 1668 | || (ehdr.e_ident[EI_DATA] != ELFDEFNNAME (MACHDEP_ENDIANNESS))) |
---|
| 1669 | { |
---|
| 1670 | rtems_rtl_set_error (EINVAL, "unsupported ELF file version"); |
---|
| 1671 | return false; |
---|
| 1672 | } |
---|
| 1673 | |
---|
| 1674 | if (!rtems_rtl_elf_machine_check (&ehdr)) |
---|
| 1675 | { |
---|
| 1676 | rtems_rtl_set_error (EINVAL, "unsupported machine type"); |
---|
| 1677 | return false; |
---|
| 1678 | } |
---|
| 1679 | |
---|
| 1680 | if (ehdr.e_type == ET_DYN) |
---|
| 1681 | { |
---|
| 1682 | rtems_rtl_set_error (EINVAL, "unsupported ELF file type"); |
---|
| 1683 | return false; |
---|
| 1684 | } |
---|
| 1685 | |
---|
| 1686 | if (ehdr.e_phentsize != 0) |
---|
| 1687 | { |
---|
| 1688 | rtems_rtl_set_error (EINVAL, "ELF file contains program headers"); |
---|
| 1689 | return false; |
---|
| 1690 | } |
---|
| 1691 | |
---|
| 1692 | if (ehdr.e_shentsize != sizeof (Elf_Shdr)) |
---|
| 1693 | { |
---|
| 1694 | rtems_rtl_set_error (EINVAL, "invalid ELF section header size"); |
---|
| 1695 | return false; |
---|
| 1696 | } |
---|
| 1697 | |
---|
[b36c5209] | 1698 | /* |
---|
| 1699 | * Set the format's architecture's maximum tramp size. |
---|
| 1700 | */ |
---|
| 1701 | obj->tramp_size = rtems_rtl_elf_relocate_tramp_max_size (); |
---|
| 1702 | |
---|
[ae5fe7e6] | 1703 | /* |
---|
| 1704 | * Parse the section information first so we have the memory map of the object |
---|
| 1705 | * file and the memory allocated. Any further allocations we make to complete |
---|
| 1706 | * the load will not fragment the memory. |
---|
| 1707 | */ |
---|
| 1708 | if (!rtems_rtl_elf_parse_sections (obj, fd, &ehdr)) |
---|
| 1709 | return false; |
---|
| 1710 | |
---|
[803eac9] | 1711 | /* |
---|
[b36c5209] | 1712 | * Set the entry point if there is one. |
---|
| 1713 | */ |
---|
| 1714 | obj->entry = (void*)(uintptr_t) ehdr.e_entry; |
---|
| 1715 | |
---|
| 1716 | /* |
---|
| 1717 | * Load the symbol table. |
---|
| 1718 | * |
---|
| 1719 | * 1. See if there are any common variables and if there are add a |
---|
| 1720 | * common section. |
---|
| 1721 | * 2. Add up the common. |
---|
| 1722 | * 3. |
---|
[803eac9] | 1723 | */ |
---|
| 1724 | if (!rtems_rtl_obj_load_symbols (obj, fd, rtems_rtl_elf_common, &common)) |
---|
| 1725 | return false; |
---|
| 1726 | if (!rtems_rtl_elf_add_common (obj, common.size, common.alignment)) |
---|
| 1727 | return false; |
---|
[b36c5209] | 1728 | if (!rtems_rtl_obj_load_symbols (obj, fd, rtems_rtl_elf_symbols_load, &ehdr)) |
---|
| 1729 | return false; |
---|
[803eac9] | 1730 | |
---|
| 1731 | /* |
---|
[b36c5209] | 1732 | * Parse the relocation records. It lets us know how many dependents |
---|
| 1733 | * and fixup trampolines there are. |
---|
[803eac9] | 1734 | */ |
---|
[b36c5209] | 1735 | if (!rtems_rtl_obj_relocate (obj, fd, rtems_rtl_elf_relocs_parser, &relocs)) |
---|
| 1736 | return false; |
---|
[ae5fe7e6] | 1737 | |
---|
[22afb034] | 1738 | /* |
---|
| 1739 | * Lock the allocator so the section memory and the trampoline memory are as |
---|
| 1740 | * clock as possible. |
---|
| 1741 | */ |
---|
| 1742 | rtems_rtl_alloc_lock (); |
---|
| 1743 | |
---|
[6c9f017] | 1744 | /* |
---|
| 1745 | * Allocate the sections. |
---|
| 1746 | */ |
---|
| 1747 | if (!rtems_rtl_obj_alloc_sections (obj, fd, rtems_rtl_elf_arch_alloc, &ehdr)) |
---|
| 1748 | return false; |
---|
| 1749 | |
---|
[b36c5209] | 1750 | if (!rtems_rtl_obj_load_symbols (obj, fd, rtems_rtl_elf_symbols_locate, &ehdr)) |
---|
[03139d5b] | 1751 | return false; |
---|
| 1752 | |
---|
| 1753 | if (!rtems_rtl_elf_dependents (obj, &relocs)) |
---|
| 1754 | return false; |
---|
| 1755 | |
---|
[d8c70ba6] | 1756 | if (!rtems_rtl_elf_alloc_trampoline (obj, relocs.unresolved)) |
---|
| 1757 | return false; |
---|
| 1758 | |
---|
[22afb034] | 1759 | /* |
---|
| 1760 | * Unlock the allocator. |
---|
| 1761 | */ |
---|
| 1762 | rtems_rtl_alloc_unlock (); |
---|
| 1763 | |
---|
[b36c5209] | 1764 | /* |
---|
| 1765 | * Load the sections and symbols and then relocation to the base address. |
---|
| 1766 | */ |
---|
| 1767 | if (!rtems_rtl_obj_load_sections (obj, fd, rtems_rtl_elf_loader, &ehdr)) |
---|
[ae5fe7e6] | 1768 | return false; |
---|
| 1769 | |
---|
[b36c5209] | 1770 | /* |
---|
| 1771 | * Fix up the relocations. |
---|
| 1772 | */ |
---|
[03139d5b] | 1773 | if (!rtems_rtl_obj_relocate (obj, fd, rtems_rtl_elf_relocs_locator, &ehdr)) |
---|
[ae5fe7e6] | 1774 | return false; |
---|
| 1775 | |
---|
[a2e1e30d] | 1776 | rtems_rtl_symbol_obj_erase_local (obj); |
---|
| 1777 | |
---|
[c6eead1] | 1778 | if (!rtems_rtl_elf_load_linkmap (obj)) |
---|
| 1779 | { |
---|
| 1780 | return false; |
---|
| 1781 | } |
---|
| 1782 | |
---|
| 1783 | if (!rtems_rtl_elf_unwind_register (obj)) |
---|
[ae5fe7e6] | 1784 | { |
---|
| 1785 | return false; |
---|
| 1786 | } |
---|
| 1787 | |
---|
| 1788 | return true; |
---|
| 1789 | } |
---|
| 1790 | |
---|
[c6eead1] | 1791 | bool |
---|
[f59d435d] | 1792 | rtems_rtl_elf_file_unload (rtems_rtl_obj* obj) |
---|
[c6eead1] | 1793 | { |
---|
[6c9f017] | 1794 | rtems_rtl_elf_arch_free (obj); |
---|
[c6eead1] | 1795 | rtems_rtl_elf_unwind_deregister (obj); |
---|
| 1796 | return true; |
---|
| 1797 | } |
---|
| 1798 | |
---|
[f59d435d] | 1799 | rtems_rtl_loader_format* |
---|
[ae5fe7e6] | 1800 | rtems_rtl_elf_file_sig (void) |
---|
| 1801 | { |
---|
| 1802 | return &elf_sig; |
---|
| 1803 | } |
---|