[ae5fe7e6] | 1 | /* |
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| 2 | * COPYRIGHT (c) 2012-2013 Chris Johns <chrisj@rtems.org> |
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| 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 RAP format loader support.. |
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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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| 24 | #include <stdlib.h> |
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| 25 | #include <string.h> |
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| 26 | #include <stdio.h> |
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| 27 | #include <unistd.h> |
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| 28 | |
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| 29 | #include <rtems/rtl/rtl.h> |
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| 30 | #include "rtl-elf.h" |
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| 31 | #include "rtl-error.h" |
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| 32 | #include "rtl-obj-comp.h" |
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| 33 | #include "rtl-rap.h" |
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| 34 | #include "rtl-trace.h" |
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| 35 | #include "rtl-unresolved.h" |
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| 36 | |
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| 37 | /** |
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| 38 | * The offsets in the unresolved array. |
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| 39 | */ |
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| 40 | #define REL_R_OFFSET (0) |
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| 41 | #define REL_R_INFO (1) |
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| 42 | #define REL_R_ADDEND (2) |
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| 43 | |
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| 44 | /** |
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| 45 | * The ELF format signature. |
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| 46 | */ |
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| 47 | static rtems_rtl_loader_format_t rap_sig = |
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| 48 | { |
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| 49 | .label = "RAP", |
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| 50 | .flags = RTEMS_RTL_FMT_COMP |
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| 51 | }; |
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| 52 | |
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| 53 | /** |
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| 54 | * The section definitions found in a RAP file. |
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| 55 | */ |
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| 56 | typedef struct rtems_rtl_rap_sectdef_s |
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| 57 | { |
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| 58 | const char* name; /**< Name of the section. */ |
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| 59 | const uint32_t flags; /**< Section flags. */ |
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| 60 | } rtems_rtl_rap_sectdef_t; |
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| 61 | |
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| 62 | /** |
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| 63 | * The section indexes. These are fixed. |
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| 64 | */ |
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| 65 | #define RTEMS_RTL_RAP_TEXT_SEC (0) |
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| 66 | #define RTEMS_RTL_RAP_CONST_SEC (1) |
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| 67 | #define RTEMS_RTL_RAP_CTOR_SEC (2) |
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| 68 | #define RTEMS_RTL_RAP_DTOR_SEC (3) |
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| 69 | #define RTEMS_RTL_RAP_DATA_SEC (4) |
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| 70 | #define RTEMS_RTL_RAP_BSS_SEC (5) |
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| 71 | #define RTEMS_RTL_RAP_SECS (6) |
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| 72 | |
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| 73 | /** |
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| 74 | * The sections as loaded from a RAP file. |
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| 75 | */ |
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| 76 | static const rtems_rtl_rap_sectdef_t rap_sections[RTEMS_RTL_RAP_SECS] = |
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| 77 | { |
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| 78 | { ".text", RTEMS_RTL_OBJ_SECT_TEXT | RTEMS_RTL_OBJ_SECT_LOAD }, |
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| 79 | { ".const", RTEMS_RTL_OBJ_SECT_CONST | RTEMS_RTL_OBJ_SECT_LOAD }, |
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| 80 | { ".ctor", RTEMS_RTL_OBJ_SECT_CONST | RTEMS_RTL_OBJ_SECT_LOAD | RTEMS_RTL_OBJ_SECT_CTOR }, |
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| 81 | { ".dtor", RTEMS_RTL_OBJ_SECT_CONST | RTEMS_RTL_OBJ_SECT_LOAD | RTEMS_RTL_OBJ_SECT_DTOR }, |
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| 82 | { ".data", RTEMS_RTL_OBJ_SECT_DATA | RTEMS_RTL_OBJ_SECT_LOAD }, |
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| 83 | { ".bss", RTEMS_RTL_OBJ_SECT_BSS | RTEMS_RTL_OBJ_SECT_ZERO } |
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| 84 | }; |
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| 85 | |
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| 86 | /** |
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| 87 | * The section definitions found in a RAP file. |
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| 88 | */ |
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| 89 | typedef struct rtems_rtl_rap_section_s |
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| 90 | { |
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| 91 | uint32_t size; /**< The size of the section. */ |
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| 92 | uint32_t alignment; /**< The alignment of the section. */ |
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| 93 | } rtems_rtl_rap_section_t; |
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| 94 | |
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| 95 | /** |
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| 96 | * The RAP loader. |
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| 97 | */ |
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| 98 | typedef struct rtems_rtl_rap_s |
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| 99 | { |
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| 100 | rtems_rtl_obj_cache_t* file; /**< The file cache for the RAP file. */ |
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| 101 | rtems_rtl_obj_comp_t* decomp; /**< The decompression streamer. */ |
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| 102 | uint32_t length; /**< The file length. */ |
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| 103 | uint32_t version; /**< The RAP file version. */ |
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| 104 | uint32_t compression; /**< The type of compression. */ |
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| 105 | uint32_t checksum; /**< The checksum. */ |
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| 106 | uint32_t machinetype; /**< The ELF machine type. */ |
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| 107 | uint32_t datatype; /**< The ELF data type. */ |
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| 108 | uint32_t class; /**< The ELF class. */ |
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| 109 | uint32_t init; /**< The initialisation strtab offset. */ |
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| 110 | uint32_t fini; /**< The finish strtab offset. */ |
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| 111 | rtems_rtl_rap_section_t secs[RTEMS_RTL_RAP_SECS]; /**< The sections. */ |
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| 112 | uint32_t symtab_size; /**< The symbol table size. */ |
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| 113 | char* strtab; /**< The string table. */ |
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| 114 | uint32_t strtab_size; /**< The string table size. */ |
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| 115 | uint32_t relocs_size; /**< The relocation table size. */ |
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| 116 | uint32_t symbols; /**< The number of symbols. */ |
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| 117 | uint32_t strtable_size;/**< The size of section names and obj names. */ |
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| 118 | uint32_t rpathlen; /**< The length of rpath. */ |
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| 119 | char* strtable; /**< The detail string which resides in obj detail. */ |
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| 120 | } rtems_rtl_rap_t; |
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| 121 | |
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| 122 | /** |
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| 123 | * Check the machine type. |
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| 124 | */ |
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| 125 | static bool |
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| 126 | rtems_rtl_rap_machine_check (uint32_t machinetype) |
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| 127 | { |
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| 128 | /* |
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| 129 | * This code is determined by the machine headers. |
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| 130 | */ |
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| 131 | switch (machinetype) |
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| 132 | { |
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| 133 | ELFDEFNNAME (MACHDEP_ID_CASES) |
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| 134 | default: |
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| 135 | return false; |
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| 136 | } |
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| 137 | return true; |
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| 138 | } |
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| 139 | |
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| 140 | /** |
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| 141 | * Check the data type. |
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| 142 | */ |
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| 143 | static bool |
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| 144 | rtems_rtl_rap_datatype_check (uint32_t datatype) |
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| 145 | { |
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| 146 | /* |
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| 147 | * This code is determined by the machine headers. |
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| 148 | */ |
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| 149 | if (datatype != ELFDEFNNAME (MACHDEP_ENDIANNESS)) |
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| 150 | return false; |
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| 151 | return true; |
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| 152 | } |
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| 153 | |
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| 154 | /** |
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| 155 | * Check the class of executable. |
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| 156 | */ |
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| 157 | static bool |
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| 158 | rtems_rtl_rap_class_check (uint32_t class) |
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| 159 | { |
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| 160 | /* |
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| 161 | * This code is determined by the machine headers. |
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| 162 | */ |
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| 163 | switch (class) |
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| 164 | { |
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| 165 | case ELFCLASS32: |
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| 166 | if (ARCH_ELFSIZE == 32) |
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| 167 | return true; |
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| 168 | break; |
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| 169 | case ELFCLASS64: |
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| 170 | if (ARCH_ELFSIZE == 64) |
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| 171 | return true; |
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| 172 | break; |
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| 173 | default: |
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| 174 | break; |
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| 175 | } |
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| 176 | return false; |
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| 177 | } |
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| 178 | |
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| 179 | static uint32_t |
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| 180 | rtems_rtl_rap_get_uint32 (const uint8_t* buffer) |
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| 181 | { |
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| 182 | uint32_t value = 0; |
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| 183 | int b; |
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| 184 | for (b = 0; b < sizeof (uint32_t); ++b) |
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| 185 | { |
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| 186 | value <<= 8; |
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| 187 | value |= buffer[b]; |
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| 188 | } |
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| 189 | return value; |
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| 190 | } |
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| 191 | |
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| 192 | static bool |
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| 193 | rtems_rtl_rap_read_uint32 (rtems_rtl_obj_comp_t* comp, uint32_t* value) |
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| 194 | { |
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| 195 | uint8_t buffer[sizeof (uint32_t)]; |
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| 196 | |
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| 197 | if (!rtems_rtl_obj_comp_read (comp, buffer, sizeof (uint32_t))) |
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| 198 | return false; |
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| 199 | |
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| 200 | *value = rtems_rtl_rap_get_uint32 (buffer); |
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| 201 | |
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| 202 | return true; |
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| 203 | } |
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| 204 | |
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| 205 | static bool |
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| 206 | rtems_rtl_rap_loader (rtems_rtl_obj_t* obj, |
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| 207 | int fd, |
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| 208 | rtems_rtl_obj_sect_t* sect, |
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| 209 | void* data) |
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| 210 | { |
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| 211 | rtems_rtl_rap_t* rap = (rtems_rtl_rap_t*) data; |
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| 212 | |
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| 213 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
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| 214 | printf ("rtl: rap: input %s=%lu\n", |
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| 215 | sect->name, rtems_rtl_obj_comp_input (rap->decomp)); |
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| 216 | |
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| 217 | return rtems_rtl_obj_comp_read (rap->decomp, sect->base, sect->size); |
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| 218 | } |
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| 219 | |
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| 220 | static bool |
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| 221 | rtems_rtl_rap_relocate (rtems_rtl_rap_t* rap, rtems_rtl_obj_t* obj) |
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| 222 | { |
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| 223 | #define SYMNAME_BUFFER_SIZE (1024) |
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| 224 | char* symname_buffer = NULL; |
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| 225 | int section; |
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| 226 | |
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| 227 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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| 228 | printf ("rtl: relocation\n"); |
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| 229 | |
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| 230 | symname_buffer = malloc (SYMNAME_BUFFER_SIZE); |
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| 231 | if (!symname_buffer) |
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| 232 | { |
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| 233 | rtems_rtl_set_error (ENOMEM, "no memory for local symbol name buffer"); |
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| 234 | return false; |
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| 235 | } |
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| 236 | |
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| 237 | for (section = 0; section < RTEMS_RTL_RAP_SECS; ++section) |
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| 238 | { |
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| 239 | rtems_rtl_obj_sect_t* targetsect; |
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| 240 | uint32_t header = 0; |
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| 241 | int relocs; |
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| 242 | bool is_rela; |
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| 243 | int r; |
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| 244 | |
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| 245 | targetsect = rtems_rtl_obj_find_section (obj, rap_sections[section].name); |
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| 246 | |
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| 247 | if (!targetsect) |
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| 248 | { |
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| 249 | rtems_rtl_set_error (EINVAL, "no target section found"); |
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| 250 | free (symname_buffer); |
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| 251 | return false; |
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| 252 | } |
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| 253 | |
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| 254 | if (!rtems_rtl_rap_read_uint32 (rap->decomp, &header)) |
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| 255 | { |
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| 256 | free (symname_buffer); |
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| 257 | return false; |
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| 258 | } |
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| 259 | |
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| 260 | /* |
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| 261 | * Bit 31 of the header indicates if the relocations for this section |
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| 262 | * have a valid addend field. |
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| 263 | */ |
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| 264 | |
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| 265 | is_rela = (header & (1 << 31)) != 0 ? true : false; |
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| 266 | relocs = header & ~(1 << 31); |
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| 267 | |
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| 268 | if (relocs && rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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| 269 | printf ("rtl: relocation: %s: header: %08lx relocs: %d %s\n", |
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| 270 | rap_sections[section].name, |
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| 271 | header, relocs, is_rela ? "rela" : "rel"); |
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| 272 | |
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| 273 | for (r = 0; r < relocs; ++r) |
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| 274 | { |
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| 275 | uint32_t info = 0; |
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| 276 | uint32_t offset = 0; |
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| 277 | uint32_t addend = 0; |
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| 278 | Elf_Word type; |
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| 279 | const char* symname = NULL; |
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| 280 | uint32_t symname_size; |
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| 281 | Elf_Word symtype = 0; |
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| 282 | Elf_Word symvalue = 0; |
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| 283 | |
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| 284 | if (!rtems_rtl_rap_read_uint32 (rap->decomp, &info)) |
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| 285 | { |
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| 286 | free (symname_buffer); |
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| 287 | return false; |
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| 288 | } |
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| 289 | |
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| 290 | if (!rtems_rtl_rap_read_uint32 (rap->decomp, &offset)) |
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| 291 | { |
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| 292 | free (symname_buffer); |
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| 293 | return false; |
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| 294 | } |
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| 295 | |
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| 296 | /* |
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| 297 | * The types are: |
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| 298 | * |
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| 299 | * 0 Section symbol offset in addend. |
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| 300 | * 1 Symbol appended to the relocation record. |
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| 301 | * 2 Symbol is in the strtabl. |
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| 302 | * |
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| 303 | * If type 2 bits 30:8 is the offset in the strtab. If type 1 the bits |
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| 304 | * are the size of the string. The lower 8 bits of the info field if the |
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| 305 | * ELF relocation type field. |
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| 306 | */ |
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| 307 | |
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| 308 | if (((info & (1 << 31)) == 0) || is_rela) |
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| 309 | { |
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| 310 | if (!rtems_rtl_rap_read_uint32 (rap->decomp, &addend)) |
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| 311 | { |
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| 312 | free (symname_buffer); |
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| 313 | return false; |
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| 314 | } |
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| 315 | } |
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| 316 | |
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| 317 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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| 318 | printf (" %2d: info=%08lx offset=%lu addend=%lu\n", |
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| 319 | r, info, offset, addend); |
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| 320 | |
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| 321 | type = info & 0xff; |
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| 322 | |
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| 323 | if ((info & (1 << 31)) == 0) |
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| 324 | { |
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| 325 | rtems_rtl_obj_sect_t* symsect; |
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| 326 | |
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| 327 | symsect = rtems_rtl_obj_find_section_by_index (obj, info >> 8); |
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| 328 | if (!symsect) |
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| 329 | { |
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| 330 | free (symname_buffer); |
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| 331 | return false; |
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| 332 | } |
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| 333 | |
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| 334 | symvalue = (Elf_Word) symsect->base + addend; |
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| 335 | } |
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| 336 | else if (rtems_rtl_elf_rel_resolve_sym (type)) |
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| 337 | { |
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| 338 | rtems_rtl_obj_sym_t* symbol; |
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| 339 | |
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| 340 | symname_size = (info & ~(3 << 30)) >> 8; |
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| 341 | |
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| 342 | if ((info & (1 << 30)) != 0) |
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| 343 | { |
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| 344 | symname = rap->strtab + symname_size; |
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| 345 | } |
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| 346 | else |
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| 347 | { |
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| 348 | if (symname_size > (SYMNAME_BUFFER_SIZE - 1)) |
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| 349 | { |
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| 350 | free (symname_buffer); |
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| 351 | rtems_rtl_set_error (EINVAL, "reloc symbol too big"); |
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| 352 | return false; |
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| 353 | } |
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| 354 | |
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| 355 | if (!rtems_rtl_obj_comp_read (rap->decomp, symname_buffer, symname_size)) |
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| 356 | { |
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| 357 | free (symname_buffer); |
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| 358 | return false; |
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| 359 | } |
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| 360 | |
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| 361 | symname_buffer[symname_size] = '\0'; |
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| 362 | symname = symname_buffer; |
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| 363 | } |
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| 364 | |
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| 365 | symbol = rtems_rtl_symbol_obj_find (obj, symname); |
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| 366 | |
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| 367 | if (!symbol) |
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| 368 | { |
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| 369 | rtems_rtl_set_error (EINVAL, "global symbol not found: %s", symname); |
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| 370 | free (symname_buffer); |
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| 371 | return false; |
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| 372 | } |
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| 373 | |
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| 374 | symvalue = (Elf_Word) symbol->value; |
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| 375 | } |
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| 376 | |
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| 377 | if (is_rela) |
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| 378 | { |
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| 379 | Elf_Rela rela; |
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| 380 | |
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| 381 | rela.r_offset = offset; |
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| 382 | rela.r_info = type; |
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| 383 | |
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| 384 | if ((info & (1 << 31)) == 0) |
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| 385 | rela.r_addend = 0; |
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| 386 | else rela.r_addend = addend; |
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| 387 | |
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| 388 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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| 389 | printf (" %2d: rela: type:%-2d off:%lu addend:%d" \ |
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| 390 | " symname=%s symtype=%lu symvalue=0x%08lx\n", |
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| 391 | r, (int) type, offset, (int) addend, |
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| 392 | symname, symtype, symvalue); |
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| 393 | |
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| 394 | if (!rtems_rtl_elf_relocate_rela (obj, &rela, targetsect, |
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| 395 | symname, symtype, symvalue)) |
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| 396 | { |
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| 397 | free (symname_buffer); |
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| 398 | return false; |
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| 399 | } |
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| 400 | } |
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| 401 | else |
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| 402 | { |
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| 403 | Elf_Rel rel; |
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| 404 | |
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| 405 | rel.r_offset = offset; |
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| 406 | rel.r_info = type; |
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| 407 | |
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| 408 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
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| 409 | printf (" %2d: rel: type:%-2d off:%lu" \ |
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| 410 | " symname=%s symtype=%lu symvalue=0x%08lx\n", |
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| 411 | r, (int) type, offset, |
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| 412 | symname, symtype, symvalue); |
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| 413 | |
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| 414 | if (!rtems_rtl_elf_relocate_rel (obj, &rel, targetsect, |
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| 415 | symname, symtype, symvalue)) |
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| 416 | { |
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| 417 | free (symname_buffer); |
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| 418 | return false; |
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| 419 | } |
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| 420 | } |
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| 421 | } |
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| 422 | } |
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| 423 | |
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| 424 | free (symname_buffer); |
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| 425 | |
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| 426 | return true; |
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| 427 | } |
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| 428 | |
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| 429 | /** |
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| 430 | * The structure of obj->detail is |
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| 431 | * |
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| 432 | * |object_detail(0..obj_num)|section_detail(0..sec_num[0..obj_num])| |
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| 433 | * obj_name(0..obj_num)|section_name(0..sec_num[0..obj_num]) |
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| 434 | * |
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| 435 | */ |
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| 436 | static bool |
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| 437 | rtems_rtl_rap_load_details (rtems_rtl_rap_t* rap, rtems_rtl_obj_t* obj) |
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| 438 | { |
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| 439 | struct link_map* tmp1; |
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| 440 | section_detail* tmp2; |
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| 441 | uint32_t obj_detail_size; |
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| 442 | uint32_t pos = 0; |
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| 443 | int i,j; |
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| 444 | |
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| 445 | obj_detail_size = sizeof (struct link_map) * obj->obj_num; |
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| 446 | |
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| 447 | for (i = 0; i < obj->obj_num; ++i) |
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| 448 | { |
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| 449 | obj_detail_size += (obj->sec_num[i] * sizeof (section_detail)); |
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| 450 | } |
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| 451 | |
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| 452 | obj->detail = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_OBJECT, |
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| 453 | obj_detail_size + rap->strtable_size, true); |
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| 454 | |
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| 455 | if (!obj->detail) |
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| 456 | { |
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| 457 | rap->strtable_size = 0; |
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| 458 | rtems_rtl_set_error (ENOMEM, "no memory for obj global syms"); |
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| 459 | return false; |
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| 460 | } |
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| 461 | |
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| 462 | rap->strtable = obj->detail + obj_detail_size; |
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| 463 | |
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| 464 | /* Read the obj names and section names */ |
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| 465 | if (!rtems_rtl_obj_comp_read (rap->decomp, rap->strtable, |
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| 466 | rap->strtable_size)) |
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| 467 | { |
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| 468 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_OBJECT, obj->detail); |
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| 469 | return false; |
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| 470 | } |
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| 471 | |
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| 472 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_DETAIL)) |
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| 473 | { |
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| 474 | if (rap->rpathlen > 0) |
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| 475 | printf ("File rpath:\n"); |
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| 476 | } |
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| 477 | |
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| 478 | while (pos < rap->rpathlen) |
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| 479 | { |
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| 480 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_DETAIL)) |
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| 481 | { |
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| 482 | printf (" %s\n", rap->strtable + pos); |
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| 483 | } |
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| 484 | pos = pos + strlen (rap->strtable + pos) + 1; |
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| 485 | } |
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| 486 | |
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| 487 | if (rap->rpathlen > 0) |
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| 488 | pos = rap->rpathlen; |
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| 489 | |
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| 490 | for (i = 0; i < obj->obj_num; ++i) |
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| 491 | { |
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| 492 | tmp1 = (struct link_map*) (obj->detail) + i; |
---|
| 493 | tmp1->name = rap->strtable + pos; |
---|
| 494 | tmp1->sec_num = obj->sec_num[i]; |
---|
| 495 | tmp1->rpathlen = rap->rpathlen; |
---|
| 496 | tmp1->rpath = (char*) rap->strtable; |
---|
| 497 | pos += strlen (tmp1->name) + 1; |
---|
| 498 | |
---|
| 499 | if (!i) |
---|
| 500 | { |
---|
| 501 | tmp1->l_next = NULL; |
---|
| 502 | tmp1->l_prev = NULL; |
---|
| 503 | } |
---|
| 504 | else |
---|
| 505 | { |
---|
| 506 | (tmp1 - 1)->l_next = tmp1; |
---|
| 507 | tmp1->l_prev = tmp1 - 1; |
---|
| 508 | tmp1->l_next = NULL; |
---|
| 509 | } |
---|
| 510 | } |
---|
| 511 | |
---|
| 512 | tmp2 =(section_detail*) ((struct link_map*) (obj->detail) + obj->obj_num); |
---|
| 513 | |
---|
| 514 | for (i = 0; i < obj->obj_num; ++i) |
---|
| 515 | { |
---|
| 516 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_DETAIL)) |
---|
| 517 | { |
---|
| 518 | printf ("File %d: %s\n", i, ((struct link_map*) obj->detail + i)->name); |
---|
| 519 | printf ("Section: %d sections\n",(unsigned int) obj->sec_num[i]); |
---|
| 520 | } |
---|
| 521 | |
---|
| 522 | ((struct link_map*)obj->detail + i)->sec_detail = tmp2; |
---|
| 523 | |
---|
| 524 | for (j = 0; j < obj->sec_num[i]; ++j) |
---|
| 525 | { |
---|
| 526 | uint32_t name; |
---|
| 527 | uint32_t rap_id; |
---|
| 528 | uint32_t offset; |
---|
| 529 | uint32_t size; |
---|
| 530 | |
---|
| 531 | if (!rtems_rtl_rap_read_uint32 (rap->decomp, &name) || |
---|
| 532 | !rtems_rtl_rap_read_uint32 (rap->decomp, &offset) || |
---|
| 533 | !rtems_rtl_rap_read_uint32 (rap->decomp, &size)) |
---|
| 534 | { |
---|
| 535 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_SYMBOL, obj->detail); |
---|
| 536 | return false; |
---|
| 537 | } |
---|
| 538 | |
---|
| 539 | rap_id = offset >> 28; |
---|
| 540 | offset = offset & 0xfffffff; |
---|
| 541 | |
---|
| 542 | tmp2->name = rap->strtable + name; |
---|
| 543 | tmp2->offset = offset; |
---|
| 544 | tmp2->rap_id = rap_id; |
---|
| 545 | tmp2->size = size; |
---|
| 546 | pos += strlen (tmp2->name) + 1; |
---|
| 547 | |
---|
| 548 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_DETAIL)) |
---|
| 549 | { |
---|
| 550 | printf ("name:%16s offset:0x%08x rap_id:%d size:0x%x\n", |
---|
| 551 | tmp2->name, (unsigned int) tmp2->offset, |
---|
| 552 | (unsigned int) tmp2->rap_id, (unsigned int) tmp2->size); |
---|
| 553 | } |
---|
| 554 | |
---|
| 555 | tmp2 += 1; |
---|
| 556 | } |
---|
| 557 | } |
---|
| 558 | return true; |
---|
| 559 | } |
---|
| 560 | |
---|
| 561 | static bool |
---|
| 562 | rtems_rtl_rap_load_symbols (rtems_rtl_rap_t* rap, rtems_rtl_obj_t* obj) |
---|
| 563 | { |
---|
| 564 | rtems_rtl_obj_sym_t* gsym; |
---|
| 565 | int sym; |
---|
| 566 | |
---|
| 567 | obj->global_size = |
---|
| 568 | rap->symbols * sizeof (rtems_rtl_obj_sym_t) + rap->strtab_size; |
---|
| 569 | |
---|
| 570 | obj->global_table = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_SYMBOL, |
---|
| 571 | obj->global_size, true); |
---|
| 572 | if (!obj->global_table) |
---|
| 573 | { |
---|
| 574 | obj->global_size = 0; |
---|
| 575 | rtems_rtl_set_error (ENOMEM, "no memory for obj global syms"); |
---|
| 576 | return false; |
---|
| 577 | } |
---|
| 578 | |
---|
| 579 | obj->global_syms = rap->symbols; |
---|
| 580 | |
---|
| 581 | rap->strtab = (((char*) obj->global_table) + |
---|
| 582 | (rap->symbols * sizeof (rtems_rtl_obj_sym_t))); |
---|
| 583 | |
---|
| 584 | if (!rtems_rtl_obj_comp_read (rap->decomp, rap->strtab, rap->strtab_size)) |
---|
| 585 | return false; |
---|
| 586 | |
---|
| 587 | for (sym = 0, gsym = obj->global_table; sym < rap->symbols; ++sym) |
---|
| 588 | { |
---|
| 589 | rtems_rtl_obj_sect_t* symsect; |
---|
| 590 | uint32_t data; |
---|
| 591 | uint32_t name; |
---|
| 592 | uint32_t value; |
---|
| 593 | |
---|
| 594 | if (!rtems_rtl_rap_read_uint32 (rap->decomp, &data) || |
---|
| 595 | !rtems_rtl_rap_read_uint32 (rap->decomp, &name) || |
---|
| 596 | !rtems_rtl_rap_read_uint32 (rap->decomp, &value)) |
---|
| 597 | { |
---|
| 598 | free (obj->global_table); |
---|
| 599 | obj->global_table = NULL; |
---|
| 600 | obj->global_syms = 0; |
---|
| 601 | obj->global_size = 0; |
---|
| 602 | return false; |
---|
| 603 | } |
---|
| 604 | |
---|
| 605 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_SYMBOL)) |
---|
| 606 | printf ("rtl: sym:load: data=0x%08lx name=0x%08lx value=0x%08lx\n", |
---|
| 607 | data, name, value); |
---|
| 608 | |
---|
| 609 | /* |
---|
| 610 | * If there is a globally exported symbol already present and this |
---|
| 611 | * symbol is not weak raise an error. If the symbol is weak and present |
---|
| 612 | * globally ignore this symbol and use the global one and if it is not |
---|
| 613 | * present take this symbol global or weak. We accept the first weak |
---|
| 614 | * symbol we find and make it globally exported. |
---|
| 615 | */ |
---|
| 616 | if (rtems_rtl_symbol_global_find (rap->strtab + name) && |
---|
| 617 | (ELF_ST_BIND (data & 0xffff) != STB_WEAK)) |
---|
| 618 | { |
---|
| 619 | rtems_rtl_set_error (EINVAL, |
---|
| 620 | "duplicate global symbol: %s", rap->strtab + name); |
---|
| 621 | free (obj->global_table); |
---|
| 622 | obj->global_table = NULL; |
---|
| 623 | obj->global_syms = 0; |
---|
| 624 | obj->global_size = 0; |
---|
| 625 | return false; |
---|
| 626 | } |
---|
| 627 | |
---|
| 628 | symsect = rtems_rtl_obj_find_section_by_index (obj, data >> 16); |
---|
| 629 | if (!symsect) |
---|
| 630 | { |
---|
| 631 | free (obj->global_table); |
---|
| 632 | obj->global_table = NULL; |
---|
| 633 | obj->global_syms = 0; |
---|
| 634 | obj->global_size = 0; |
---|
| 635 | rtems_rtl_set_error (EINVAL, "section index not found: %lu", data >> 16); |
---|
| 636 | return false; |
---|
| 637 | } |
---|
| 638 | |
---|
| 639 | rtems_chain_set_off_chain (&gsym->node); |
---|
| 640 | gsym->name = rap->strtab + name; |
---|
| 641 | gsym->value = (uint8_t*) (value + symsect->base); |
---|
| 642 | gsym->data = data & 0xffff; |
---|
| 643 | |
---|
| 644 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_SYMBOL)) |
---|
| 645 | printf ("rtl: sym:add:%-2d name:%-20s bind:%-2d type:%-2d val:%8p sect:%d\n", |
---|
| 646 | sym, gsym->name, |
---|
| 647 | (int) ELF_ST_BIND (data & 0xffff), |
---|
| 648 | (int) ELF_ST_TYPE (data & 0xffff), |
---|
| 649 | gsym->value, (int) (data >> 16)); |
---|
| 650 | |
---|
| 651 | ++gsym; |
---|
| 652 | } |
---|
| 653 | |
---|
| 654 | return true; |
---|
| 655 | } |
---|
| 656 | |
---|
| 657 | static bool |
---|
| 658 | rtems_rtl_rap_parse_header (uint8_t* rhdr, |
---|
| 659 | size_t* rhdr_len, |
---|
| 660 | uint32_t* length, |
---|
| 661 | uint32_t* version, |
---|
| 662 | uint32_t* compression, |
---|
| 663 | uint32_t* checksum) |
---|
| 664 | { |
---|
| 665 | char* sptr = (char*) rhdr; |
---|
| 666 | char* eptr; |
---|
| 667 | |
---|
| 668 | *rhdr_len = 0; |
---|
| 669 | |
---|
| 670 | /* |
---|
| 671 | * "RAP," = 4 bytes, total 4 |
---|
| 672 | */ |
---|
| 673 | |
---|
| 674 | if ((rhdr[0] != 'R') || (rhdr[1] != 'A') || (rhdr[2] != 'P') || (rhdr[3] != ',')) |
---|
| 675 | return false; |
---|
| 676 | |
---|
| 677 | sptr = sptr + 4; |
---|
| 678 | |
---|
| 679 | /* |
---|
| 680 | * "00000000," = 9 bytes, total 13 |
---|
| 681 | */ |
---|
| 682 | |
---|
| 683 | *length = strtoul (sptr, &eptr, 10); |
---|
| 684 | |
---|
| 685 | if (*eptr != ',') |
---|
| 686 | return false; |
---|
| 687 | |
---|
| 688 | sptr = eptr + 1; |
---|
| 689 | |
---|
| 690 | /* |
---|
| 691 | * "0000," = 5 bytes, total 18 |
---|
| 692 | */ |
---|
| 693 | |
---|
| 694 | *version = strtoul (sptr, &eptr, 10); |
---|
| 695 | |
---|
| 696 | if (*eptr != ',') |
---|
| 697 | return false; |
---|
| 698 | |
---|
| 699 | sptr = eptr + 1; |
---|
| 700 | |
---|
| 701 | /* |
---|
| 702 | * "NONE," and "LZ77," = 5 bytes, total 23 |
---|
| 703 | */ |
---|
| 704 | |
---|
| 705 | if ((sptr[0] == 'N') && |
---|
| 706 | (sptr[1] == 'O') && |
---|
| 707 | (sptr[2] == 'N') && |
---|
| 708 | (sptr[3] == 'E')) |
---|
| 709 | { |
---|
| 710 | *compression = RTEMS_RTL_COMP_NONE; |
---|
| 711 | eptr = sptr + 4; |
---|
| 712 | } |
---|
| 713 | else if ((sptr[0] == 'L') && |
---|
| 714 | (sptr[1] == 'Z') && |
---|
| 715 | (sptr[2] == '7') && |
---|
| 716 | (sptr[3] == '7')) |
---|
| 717 | { |
---|
| 718 | *compression = RTEMS_RTL_COMP_LZ77; |
---|
| 719 | eptr = sptr + 4; |
---|
| 720 | } |
---|
| 721 | else |
---|
| 722 | return false; |
---|
| 723 | |
---|
| 724 | if (*eptr != ',') |
---|
| 725 | return false; |
---|
| 726 | |
---|
| 727 | sptr = eptr + 1; |
---|
| 728 | |
---|
| 729 | /* |
---|
| 730 | * "00000000," = 9 bytes, total 32 |
---|
| 731 | */ |
---|
| 732 | *checksum = strtoul (sptr, &eptr, 16); |
---|
| 733 | |
---|
| 734 | /* |
---|
| 735 | * "\n" = 1 byte, total 33 |
---|
| 736 | */ |
---|
| 737 | if (*eptr != '\n') |
---|
| 738 | return false; |
---|
| 739 | |
---|
| 740 | *rhdr_len = ((uint8_t*) eptr) - rhdr + 1; |
---|
| 741 | |
---|
| 742 | return true; |
---|
| 743 | } |
---|
| 744 | |
---|
| 745 | bool |
---|
| 746 | rtems_rtl_rap_file_check (rtems_rtl_obj_t* obj, int fd) |
---|
| 747 | { |
---|
| 748 | rtems_rtl_obj_cache_t* header; |
---|
| 749 | uint8_t* rhdr = NULL; |
---|
| 750 | size_t rlen = 64; |
---|
| 751 | uint32_t length = 0; |
---|
| 752 | uint32_t version = 0; |
---|
| 753 | uint32_t compression = 0; |
---|
| 754 | uint32_t checksum = 0; |
---|
| 755 | |
---|
| 756 | rtems_rtl_obj_caches (&header, NULL, NULL); |
---|
| 757 | |
---|
| 758 | if (!rtems_rtl_obj_cache_read (header, fd, obj->ooffset, |
---|
| 759 | (void**) &rhdr, &rlen)) |
---|
| 760 | return false; |
---|
| 761 | |
---|
| 762 | if (!rtems_rtl_rap_parse_header (rhdr, |
---|
| 763 | &rlen, |
---|
| 764 | &length, |
---|
| 765 | &version, |
---|
| 766 | &compression, |
---|
| 767 | &checksum)) |
---|
| 768 | return false; |
---|
| 769 | |
---|
| 770 | return true; |
---|
| 771 | } |
---|
| 772 | |
---|
| 773 | bool |
---|
| 774 | rtems_rtl_rap_file_load (rtems_rtl_obj_t* obj, int fd) |
---|
| 775 | { |
---|
| 776 | rtems_rtl_rap_t rap = { 0 }; |
---|
| 777 | uint8_t* rhdr = NULL; |
---|
| 778 | size_t rlen = 64; |
---|
| 779 | int section; |
---|
| 780 | |
---|
| 781 | rtems_rtl_obj_caches (&rap.file, NULL, NULL); |
---|
| 782 | |
---|
| 783 | if (!rtems_rtl_obj_cache_read (rap.file, fd, obj->ooffset, |
---|
| 784 | (void**) &rhdr, &rlen)) |
---|
| 785 | return false; |
---|
| 786 | |
---|
| 787 | if (!rtems_rtl_rap_parse_header (rhdr, |
---|
| 788 | &rlen, |
---|
| 789 | &rap.length, |
---|
| 790 | &rap.version, |
---|
| 791 | &rap.compression, |
---|
| 792 | &rap.checksum)) |
---|
| 793 | { |
---|
| 794 | rtems_rtl_set_error (EINVAL, "invalid RAP file format"); |
---|
| 795 | return false; |
---|
| 796 | } |
---|
| 797 | |
---|
| 798 | /* |
---|
| 799 | * Set up the decompressor. |
---|
| 800 | */ |
---|
| 801 | rtems_rtl_obj_comp (&rap.decomp, rap.file, fd, rap.compression, |
---|
| 802 | rlen + obj->ooffset); |
---|
| 803 | |
---|
| 804 | /* |
---|
| 805 | * uint32_t: machinetype |
---|
| 806 | * uint32_t: datatype |
---|
| 807 | * uint32_t: class |
---|
| 808 | */ |
---|
| 809 | |
---|
| 810 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
| 811 | printf ("rtl: rap: input machine=%lu\n", |
---|
| 812 | rtems_rtl_obj_comp_input (rap.decomp)); |
---|
| 813 | |
---|
| 814 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.machinetype)) |
---|
| 815 | return false; |
---|
| 816 | |
---|
| 817 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
| 818 | printf ("rtl: rap: machinetype=%lu\n", rap.machinetype); |
---|
| 819 | |
---|
| 820 | if (!rtems_rtl_rap_machine_check (rap.machinetype)) |
---|
| 821 | { |
---|
| 822 | rtems_rtl_set_error (EINVAL, "invalid machinetype"); |
---|
| 823 | return false; |
---|
| 824 | } |
---|
| 825 | |
---|
| 826 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.datatype)) |
---|
| 827 | return false; |
---|
| 828 | |
---|
| 829 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
| 830 | printf ("rtl: rap: datatype=%lu\n", rap.datatype); |
---|
| 831 | |
---|
| 832 | if (!rtems_rtl_rap_datatype_check (rap.datatype)) |
---|
| 833 | { |
---|
| 834 | rtems_rtl_set_error (EINVAL, "invalid datatype"); |
---|
| 835 | return false; |
---|
| 836 | } |
---|
| 837 | |
---|
| 838 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.class)) |
---|
| 839 | return false; |
---|
| 840 | |
---|
| 841 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
| 842 | printf ("rtl: rap: class=%lu\n", rap.class); |
---|
| 843 | |
---|
| 844 | if (!rtems_rtl_rap_class_check (rap.class)) |
---|
| 845 | { |
---|
| 846 | rtems_rtl_set_error (EINVAL, "invalid class"); |
---|
| 847 | return false; |
---|
| 848 | } |
---|
| 849 | |
---|
| 850 | /* |
---|
| 851 | * uint32_t: init |
---|
| 852 | * uint32_t: fini |
---|
| 853 | * uint32_t: symtab_size |
---|
| 854 | * uint32_t: strtab_size |
---|
| 855 | * uint32_t: relocs_size |
---|
| 856 | */ |
---|
| 857 | |
---|
| 858 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
| 859 | printf ("rtl: rap: input header=%lu\n", |
---|
| 860 | rtems_rtl_obj_comp_input (rap.decomp)); |
---|
| 861 | |
---|
| 862 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.init)) |
---|
| 863 | return false; |
---|
| 864 | |
---|
| 865 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.fini)) |
---|
| 866 | return false; |
---|
| 867 | |
---|
| 868 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.symtab_size)) |
---|
| 869 | return false; |
---|
| 870 | |
---|
| 871 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.strtab_size)) |
---|
| 872 | return false; |
---|
| 873 | |
---|
| 874 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.relocs_size)) |
---|
| 875 | return false; |
---|
| 876 | |
---|
| 877 | rap.symbols = rap.symtab_size / (3 * sizeof (uint32_t)); |
---|
| 878 | |
---|
| 879 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
| 880 | printf ("rtl: rap: load: symtab=%lu (%lu) strtab=%lu relocs=%lu\n", |
---|
| 881 | rap.symtab_size, rap.symbols, |
---|
| 882 | rap.strtab_size, rap.relocs_size); |
---|
| 883 | |
---|
| 884 | /* |
---|
| 885 | * Load the details |
---|
| 886 | */ |
---|
| 887 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &obj->obj_num)) |
---|
| 888 | return false; |
---|
| 889 | |
---|
| 890 | if (obj->obj_num > 0) |
---|
| 891 | { |
---|
| 892 | obj->sec_num = (uint32_t*) malloc (sizeof (uint32_t) * obj->obj_num); |
---|
| 893 | |
---|
| 894 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.rpathlen)) |
---|
| 895 | return false; |
---|
| 896 | |
---|
| 897 | uint32_t i; |
---|
| 898 | for (i = 0; i < obj->obj_num; ++i) |
---|
| 899 | { |
---|
| 900 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &(obj->sec_num[i]))) |
---|
| 901 | return false; |
---|
| 902 | } |
---|
| 903 | |
---|
| 904 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.strtable_size)) |
---|
| 905 | return false; |
---|
| 906 | |
---|
| 907 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_DETAIL)) |
---|
| 908 | printf ("rtl: rap: details: obj_num=%lu\n", obj->obj_num); |
---|
| 909 | |
---|
| 910 | if (!rtems_rtl_rap_load_details (&rap, obj)) |
---|
| 911 | return false; |
---|
| 912 | } |
---|
| 913 | |
---|
| 914 | /* |
---|
| 915 | * uint32_t: text_size |
---|
| 916 | * uint32_t: text_alignment |
---|
| 917 | * uint32_t: const_size |
---|
| 918 | * uint32_t: const_alignment |
---|
| 919 | * uint32_t: ctor_size |
---|
| 920 | * uint32_t: ctor_alignment |
---|
| 921 | * uint32_t: dtor_size |
---|
| 922 | * uint32_t: dtor_alignment |
---|
| 923 | * uint32_t: data_size |
---|
| 924 | * uint32_t: data_alignment |
---|
| 925 | * uint32_t: bss_size |
---|
| 926 | * uint32_t: bss_alignment |
---|
| 927 | */ |
---|
| 928 | |
---|
| 929 | for (section = 0; section < RTEMS_RTL_RAP_SECS; ++section) |
---|
| 930 | { |
---|
| 931 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.secs[section].size)) |
---|
| 932 | return false; |
---|
| 933 | |
---|
| 934 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.secs[section].alignment)) |
---|
| 935 | return false; |
---|
| 936 | |
---|
| 937 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD_SECT)) |
---|
| 938 | printf ("rtl: rap: %s: size=%lu align=%lu\n", |
---|
| 939 | rap_sections[section].name, |
---|
| 940 | rap.secs[section].size, |
---|
| 941 | rap.secs[section].alignment); |
---|
| 942 | |
---|
| 943 | if (!rtems_rtl_obj_add_section (obj, |
---|
| 944 | section, |
---|
| 945 | rap_sections[section].name, |
---|
| 946 | rap.secs[section].size, |
---|
| 947 | 0, |
---|
| 948 | rap.secs[section].alignment, |
---|
| 949 | 0, 0, |
---|
| 950 | rap_sections[section].flags)) |
---|
| 951 | return false; |
---|
| 952 | } |
---|
| 953 | |
---|
| 954 | /** obj->entry = (void*)(uintptr_t) ehdr.e_entry; */ |
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| 955 | |
---|
| 956 | if (!rtems_rtl_obj_load_sections (obj, fd, rtems_rtl_rap_loader, &rap)) |
---|
| 957 | return false; |
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| 958 | |
---|
| 959 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
| 960 | printf ("rtl: rap: input symbols=%lu\n", |
---|
| 961 | rtems_rtl_obj_comp_input (rap.decomp)); |
---|
| 962 | |
---|
| 963 | if (!rtems_rtl_rap_load_symbols (&rap, obj)) |
---|
| 964 | return false; |
---|
| 965 | |
---|
| 966 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
| 967 | printf ("rtl: rap: input relocs=%lu\n", |
---|
| 968 | rtems_rtl_obj_comp_input (rap.decomp)); |
---|
| 969 | |
---|
| 970 | if (!rtems_rtl_rap_relocate (&rap, obj)) |
---|
| 971 | return false; |
---|
| 972 | |
---|
[8709aa04] | 973 | rtems_rtl_obj_synchronize_cache (obj); |
---|
| 974 | |
---|
[ae5fe7e6] | 975 | return true; |
---|
| 976 | } |
---|
| 977 | |
---|
| 978 | rtems_rtl_loader_format_t* |
---|
| 979 | rtems_rtl_rap_file_sig (void) |
---|
| 980 | { |
---|
| 981 | return &rap_sig; |
---|
| 982 | } |
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