[ae5fe7e6] | 1 | /* |
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[f59d435d] | 2 | * COPYRIGHT (c) 2012, 2018 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_rtl |
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| 12 | * |
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| 13 | * @brief RTEMS Run-Time Linker Object File Unresolved Relocations Table. |
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| 14 | */ |
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| 15 | |
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| 16 | #if HAVE_CONFIG_H |
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| 17 | #include "config.h" |
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| 18 | #endif |
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| 19 | |
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| 20 | #include <errno.h> |
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| 21 | #include <inttypes.h> |
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| 22 | #include <stdlib.h> |
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| 23 | #include <stdio.h> |
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[b2ed712] | 24 | #include <string.h> |
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[ae5fe7e6] | 25 | |
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| 26 | #include <rtems/rtl/rtl.h> |
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| 27 | #include "rtl-error.h" |
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[990adc5] | 28 | #include <rtems/rtl/rtl-unresolved.h> |
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| 29 | #include <rtems/rtl/rtl-trace.h> |
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[ae5fe7e6] | 30 | |
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[f59d435d] | 31 | static rtems_rtl_unresolv_block* |
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| 32 | rtems_rtl_unresolved_block_alloc (rtems_rtl_unresolved* unresolved) |
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[ae5fe7e6] | 33 | { |
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| 34 | /* |
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| 35 | * The block header contains a record. |
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| 36 | */ |
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| 37 | size_t size = |
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[f59d435d] | 38 | (sizeof(rtems_rtl_unresolv_block) + |
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| 39 | (sizeof(rtems_rtl_unresolv_rec) * (unresolved->block_recs - 1))); |
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| 40 | rtems_rtl_unresolv_block* block = |
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[ae5fe7e6] | 41 | rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_EXTERNAL, size, true); |
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| 42 | if (block) |
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[8e7c72a7] | 43 | { |
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| 44 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_UNRESOLVED)) |
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| 45 | printf ("rtl: unresolv: block-alloc %p\n", block); |
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[ae5fe7e6] | 46 | rtems_chain_append (&unresolved->blocks, &block->link); |
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[8e7c72a7] | 47 | } |
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[ae5fe7e6] | 48 | else |
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| 49 | rtems_rtl_set_error (ENOMEM, "no memory for unresolved block"); |
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| 50 | return block; |
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| 51 | } |
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| 52 | |
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| 53 | static size_t |
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[89c59be] | 54 | rtems_rtl_unresolved_symbol_rec_count (size_t length) |
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[ae5fe7e6] | 55 | { |
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[89c59be] | 56 | return ((length + sizeof(rtems_rtl_unresolv_symbol) - 1) / |
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| 57 | sizeof(rtems_rtl_unresolv_symbol)); |
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| 58 | } |
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| 59 | |
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| 60 | |
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| 61 | static size_t |
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| 62 | rtems_rtl_unresolved_symbol_recs (const char* name) |
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| 63 | { |
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| 64 | return rtems_rtl_unresolved_symbol_rec_count (strlen (name)); |
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[ae5fe7e6] | 65 | } |
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| 66 | |
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| 67 | static int |
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[f59d435d] | 68 | rtems_rtl_unresolved_rec_index (rtems_rtl_unresolv_block* block, |
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| 69 | rtems_rtl_unresolv_rec* rec) |
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[ae5fe7e6] | 70 | { |
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[f59d435d] | 71 | return (rec - &block->rec) / sizeof (rtems_rtl_unresolv_rec); |
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[ae5fe7e6] | 72 | } |
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| 73 | |
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[f59d435d] | 74 | static rtems_rtl_unresolv_rec* |
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| 75 | rtems_rtl_unresolved_rec_first (rtems_rtl_unresolv_block* block) |
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[ae5fe7e6] | 76 | { |
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| 77 | return &block->rec; |
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| 78 | } |
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| 79 | |
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[f59d435d] | 80 | static rtems_rtl_unresolv_rec* |
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| 81 | rtems_rtl_unresolved_rec_next (rtems_rtl_unresolv_rec* rec) |
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[ae5fe7e6] | 82 | { |
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| 83 | switch (rec->type) |
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| 84 | { |
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| 85 | case rtems_rtl_unresolved_empty: |
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| 86 | /* |
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| 87 | * Empty returns NULL. The end of the records in the block. |
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| 88 | */ |
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| 89 | rec = NULL; |
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| 90 | break; |
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| 91 | |
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[89c59be] | 92 | case rtems_rtl_unresolved_symbol: |
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[ae5fe7e6] | 93 | /* |
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| 94 | * Determine how many records the name occupies. Round up. |
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| 95 | */ |
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[89c59be] | 96 | rec += rtems_rtl_unresolved_symbol_rec_count (rec->rec.name.length); |
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[ae5fe7e6] | 97 | break; |
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| 98 | |
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| 99 | case rtems_rtl_unresolved_reloc: |
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| 100 | ++rec; |
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| 101 | break; |
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| 102 | |
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| 103 | default: |
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| 104 | break; |
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| 105 | } |
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| 106 | |
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| 107 | return rec; |
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| 108 | } |
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| 109 | |
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| 110 | static bool |
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[f59d435d] | 111 | rtems_rtl_unresolved_rec_is_last (rtems_rtl_unresolv_block* block, |
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| 112 | rtems_rtl_unresolv_rec* rec) |
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[ae5fe7e6] | 113 | { |
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| 114 | int index = (rec - &block->rec) / sizeof (rec); |
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| 115 | return !rec || (index >= block->recs) || (rec->type == rtems_rtl_unresolved_empty); |
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| 116 | } |
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| 117 | |
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[f59d435d] | 118 | static rtems_rtl_unresolv_rec* |
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| 119 | rtems_rtl_unresolved_rec_first_free (rtems_rtl_unresolv_block* block) |
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[ae5fe7e6] | 120 | { |
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| 121 | return &block->rec + block->recs; |
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| 122 | } |
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| 123 | |
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| 124 | static int |
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[f59d435d] | 125 | rtems_rtl_unresolved_find_name (rtems_rtl_unresolved* unresolved, |
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| 126 | const char* name, |
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| 127 | bool update_refcount) |
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[ae5fe7e6] | 128 | { |
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[8e7c72a7] | 129 | size_t length = strlen (name) + 1; |
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[ae5fe7e6] | 130 | int index = 1; |
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| 131 | |
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| 132 | rtems_chain_node* node = rtems_chain_first (&unresolved->blocks); |
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| 133 | while (!rtems_chain_is_tail (&unresolved->blocks, node)) |
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| 134 | { |
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[f59d435d] | 135 | rtems_rtl_unresolv_block* block = (rtems_rtl_unresolv_block*) node; |
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| 136 | rtems_rtl_unresolv_rec* rec = rtems_rtl_unresolved_rec_first (block); |
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[ae5fe7e6] | 137 | |
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| 138 | while (!rtems_rtl_unresolved_rec_is_last (block, rec)) |
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| 139 | { |
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[89c59be] | 140 | if (rec->type == rtems_rtl_unresolved_symbol) |
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[ae5fe7e6] | 141 | { |
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| 142 | if ((rec->rec.name.length == length) |
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[8e7c72a7] | 143 | && (strcmp (rec->rec.name.name, name) == 0)) |
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[ae5fe7e6] | 144 | { |
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| 145 | if (update_refcount) |
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| 146 | ++rec->rec.name.refs; |
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| 147 | return index; |
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| 148 | } |
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| 149 | ++index; |
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| 150 | } |
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| 151 | rec = rtems_rtl_unresolved_rec_next (rec); |
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| 152 | } |
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| 153 | |
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| 154 | node = rtems_chain_next (node); |
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| 155 | } |
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| 156 | |
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| 157 | return 0 - index; |
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| 158 | } |
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| 159 | |
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| 160 | /** |
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[d0a7f03] | 161 | * Struct to pass relocation data in the iterator. |
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[ae5fe7e6] | 162 | */ |
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[f59d435d] | 163 | typedef struct rtems_rtl_unresolved_reloc_data |
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[ae5fe7e6] | 164 | { |
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[8e7c72a7] | 165 | uint16_t name; /**< Name index. */ |
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[f59d435d] | 166 | rtems_rtl_unresolv_rec* name_rec; /**< Name record. */ |
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| 167 | rtems_rtl_obj_sym* sym; /**< The symbol record. */ |
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| 168 | } rtems_rtl_unresolved_reloc_data; |
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[ae5fe7e6] | 169 | |
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| 170 | static bool |
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[f59d435d] | 171 | rtems_rtl_unresolved_resolve_reloc (rtems_rtl_unresolv_rec* rec, |
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| 172 | void* data) |
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[ae5fe7e6] | 173 | { |
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| 174 | if (rec->type == rtems_rtl_unresolved_reloc) |
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| 175 | { |
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[89c59be] | 176 | rtems_chain_control* pending; |
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[f59d435d] | 177 | rtems_rtl_unresolved_reloc_data* rd; |
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[89c59be] | 178 | |
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[f59d435d] | 179 | rd = (rtems_rtl_unresolved_reloc_data*) data; |
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[ae5fe7e6] | 180 | |
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[03139d5b] | 181 | if (rec->rec.reloc.name == rd->name && rec->rec.reloc.obj != NULL) |
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[ae5fe7e6] | 182 | { |
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| 183 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_UNRESOLVED)) |
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[4408603] | 184 | printf ("rtl: unresolv: resolve reloc: %s\n", |
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| 185 | rd->name_rec->rec.name.name); |
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[ae5fe7e6] | 186 | |
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| 187 | rtems_rtl_obj_relocate_unresolved (&rec->rec.reloc, rd->sym); |
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| 188 | |
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| 189 | /* |
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[89c59be] | 190 | * If all unresolved externals are resolved add the obj module |
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| 191 | * to the pending queue. This will flush the object module's |
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| 192 | * data from the cache and call it's constructors. |
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| 193 | */ |
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| 194 | if (rec->rec.reloc.obj->unresolved == 0) |
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| 195 | { |
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| 196 | pending = rtems_rtl_pending_unprotected (); |
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[4408603] | 197 | rtems_chain_extract (&rec->rec.reloc.obj->link); |
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[89c59be] | 198 | rtems_chain_append (pending, &rec->rec.reloc.obj->link); |
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| 199 | } |
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| 200 | |
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| 201 | /* |
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| 202 | * Check Set the object pointer to NULL to indicate the record is not used |
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[ae5fe7e6] | 203 | * anymore. Update the reference count of the name. The sweep after |
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| 204 | * relocating will remove the reloc records with obj set to NULL and |
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| 205 | * names with a reference count of 0. |
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| 206 | */ |
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| 207 | rec->rec.reloc.obj = NULL; |
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[03139d5b] | 208 | if (rd->name_rec != NULL && rd->name_rec->rec.name.refs > 0) |
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[ae5fe7e6] | 209 | --rd->name_rec->rec.name.refs; |
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| 210 | } |
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| 211 | } |
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| 212 | return false; |
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| 213 | } |
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| 214 | |
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| 215 | static bool |
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[f59d435d] | 216 | rtems_rtl_unresolved_resolve_iterator (rtems_rtl_unresolv_rec* rec, |
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| 217 | void* data) |
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[ae5fe7e6] | 218 | { |
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[89c59be] | 219 | if (rec->type == rtems_rtl_unresolved_symbol) |
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[ae5fe7e6] | 220 | { |
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[f59d435d] | 221 | rtems_rtl_unresolved_reloc_data* rd; |
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| 222 | rd = (rtems_rtl_unresolved_reloc_data*) data; |
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[ae5fe7e6] | 223 | |
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| 224 | ++rd->name; |
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| 225 | |
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| 226 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_UNRESOLVED)) |
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| 227 | printf ("rtl: unresolv: lookup: %d: %s\n", rd->name, rec->rec.name.name); |
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| 228 | |
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| 229 | rd->sym = rtems_rtl_symbol_global_find (rec->rec.name.name); |
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| 230 | |
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| 231 | if (rd->sym) |
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| 232 | { |
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| 233 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_UNRESOLVED)) |
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| 234 | printf ("rtl: unresolv: found: %s\n", rec->rec.name.name); |
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| 235 | |
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| 236 | rd->name_rec = rec; |
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| 237 | |
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[89c59be] | 238 | rtems_rtl_unresolved_iterate (rtems_rtl_unresolved_resolve_reloc, rd); |
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[ae5fe7e6] | 239 | |
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| 240 | rd->name_rec = NULL; |
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| 241 | rd->sym = NULL; |
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| 242 | } |
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| 243 | } |
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| 244 | |
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| 245 | return false; |
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| 246 | } |
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| 247 | |
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[89c59be] | 248 | /** |
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| 249 | * Struct to pass archive relocation data in the iterator. |
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| 250 | */ |
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| 251 | typedef struct rtems_rtl_unresolved_archive_reloc_data |
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| 252 | { |
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| 253 | uint16_t name; /**< Name index. */ |
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| 254 | bool loaded; /**< Object file loaded. */ |
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| 255 | rtems_rtl_archives* archives; /**< The archives to search. */ |
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| 256 | } rtems_rtl_unresolved_archive_reloc_data; |
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| 257 | |
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| 258 | static bool |
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| 259 | rtems_rtl_unresolved_archive_iterator (rtems_rtl_unresolv_rec* rec, |
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| 260 | void* data) |
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| 261 | { |
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| 262 | if (rec->type == rtems_rtl_unresolved_symbol) |
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| 263 | { |
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| 264 | rtems_rtl_unresolved_archive_reloc_data* ard; |
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| 265 | ard = (rtems_rtl_unresolved_archive_reloc_data*) data; |
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| 266 | |
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| 267 | ++ard->name; |
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| 268 | |
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| 269 | if ((rec->rec.name.flags & RTEMS_RTL_UNRESOLV_SYM_SEARCH_ARCHIVE) != 0) |
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| 270 | { |
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| 271 | rtems_rtl_archive_search load; |
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| 272 | |
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| 273 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_UNRESOLVED)) |
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| 274 | printf ("rtl: unresolv: archive lookup: %d: %s\n", |
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| 275 | ard->name, rec->rec.name.name); |
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| 276 | |
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| 277 | load = rtems_rtl_archive_obj_load (ard->archives, |
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| 278 | rec->rec.name.name, true); |
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| 279 | if (load == rtems_rtl_archive_search_loaded) |
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| 280 | { |
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| 281 | ard->loaded = true; |
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| 282 | return true; |
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| 283 | } |
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| 284 | } |
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| 285 | } |
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| 286 | |
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| 287 | return false; |
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| 288 | } |
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| 289 | |
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| 290 | static bool |
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| 291 | rtems_rtl_unresolved_archive_search_iterator (rtems_rtl_unresolv_rec* rec, |
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| 292 | void* data) |
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| 293 | { |
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| 294 | if (rec->type == rtems_rtl_unresolved_symbol) |
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| 295 | rec->rec.name.flags = RTEMS_RTL_UNRESOLV_SYM_SEARCH_ARCHIVE; |
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| 296 | return false; |
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| 297 | } |
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| 298 | |
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[ae5fe7e6] | 299 | static void |
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[f59d435d] | 300 | rtems_rtl_unresolved_clean_block (rtems_rtl_unresolv_block* block, |
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| 301 | rtems_rtl_unresolv_rec* rec, |
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| 302 | size_t count, |
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| 303 | size_t recs_per_block) |
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[ae5fe7e6] | 304 | { |
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| 305 | size_t index = rtems_rtl_unresolved_rec_index (block, rec); |
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| 306 | size_t bytes = |
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[f59d435d] | 307 | (block->recs - index - count) * sizeof (rtems_rtl_unresolv_rec); |
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[ae5fe7e6] | 308 | if (bytes) |
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| 309 | memmove (rec, rec + count, bytes); |
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[8e7c72a7] | 310 | block->recs -= count; |
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[f59d435d] | 311 | bytes = count * sizeof (rtems_rtl_unresolv_rec); |
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[ae5fe7e6] | 312 | memset (&block->rec + block->recs, 0, bytes); |
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| 313 | } |
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| 314 | |
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| 315 | static void |
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| 316 | rtems_rtl_unresolved_compact (void) |
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| 317 | { |
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[f59d435d] | 318 | rtems_rtl_unresolved* unresolved = rtems_rtl_unresolved_unprotected (); |
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[ae5fe7e6] | 319 | if (unresolved) |
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| 320 | { |
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| 321 | /* |
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[89c59be] | 322 | * Iterate over the blocks removing any empty strings. If a string is |
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| 323 | * removed update the indexes of all strings above this level. |
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[ae5fe7e6] | 324 | */ |
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[8e7c72a7] | 325 | rtems_chain_node* node = rtems_chain_first (&unresolved->blocks); |
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| 326 | uint16_t index = 0; |
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| 327 | while (!rtems_chain_is_tail (&unresolved->blocks, node)) |
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[ae5fe7e6] | 328 | { |
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[f59d435d] | 329 | rtems_rtl_unresolv_block* block = (rtems_rtl_unresolv_block*) node; |
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| 330 | rtems_rtl_unresolv_rec* rec = rtems_rtl_unresolved_rec_first (block); |
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[ae5fe7e6] | 331 | |
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| 332 | while (!rtems_rtl_unresolved_rec_is_last (block, rec)) |
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| 333 | { |
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[8e7c72a7] | 334 | bool next_rec = true; |
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[89c59be] | 335 | if (rec->type == rtems_rtl_unresolved_symbol) |
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[ae5fe7e6] | 336 | { |
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[8e7c72a7] | 337 | ++index; |
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[ae5fe7e6] | 338 | if (rec->rec.name.refs == 0) |
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| 339 | { |
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[8e7c72a7] | 340 | /* |
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[d0a7f03] | 341 | * Iterate over the remaining reloc records and update the index. |
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[8e7c72a7] | 342 | */ |
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| 343 | rtems_chain_node* reindex_node; |
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| 344 | rtems_rtl_unresolv_rec* reindex_first; |
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| 345 | size_t name_recs; |
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| 346 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_UNRESOLVED)) |
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| 347 | printf ("rtl: unresolv: remove name: %s\n", rec->rec.name.name); |
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| 348 | reindex_node = node; |
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| 349 | reindex_first = rtems_rtl_unresolved_rec_next (rec); |
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| 350 | while (!rtems_chain_is_tail (&unresolved->blocks, reindex_node)) |
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| 351 | { |
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| 352 | rtems_rtl_unresolv_rec* reindex_rec; |
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| 353 | rtems_rtl_unresolv_block* reindex_block; |
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| 354 | reindex_block = (rtems_rtl_unresolv_block*) reindex_node; |
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| 355 | if (reindex_first != NULL) |
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| 356 | { |
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| 357 | reindex_rec = reindex_first; |
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| 358 | reindex_first = NULL; |
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| 359 | } |
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| 360 | else |
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| 361 | { |
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| 362 | reindex_rec = rtems_rtl_unresolved_rec_first (reindex_block); |
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| 363 | } |
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| 364 | while (!rtems_rtl_unresolved_rec_is_last (reindex_block, |
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| 365 | reindex_rec)) |
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| 366 | { |
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| 367 | if (reindex_rec->type == rtems_rtl_unresolved_reloc) |
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| 368 | { |
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| 369 | if (reindex_rec->rec.reloc.name >= index) |
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| 370 | --reindex_rec->rec.reloc.name; |
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| 371 | } |
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| 372 | reindex_rec = rtems_rtl_unresolved_rec_next (reindex_rec); |
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| 373 | } |
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| 374 | reindex_node = rtems_chain_next (reindex_node); |
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| 375 | } |
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| 376 | /* |
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| 377 | * Compact the block removing the name record. |
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| 378 | */ |
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[89c59be] | 379 | name_recs = rtems_rtl_unresolved_symbol_recs (rec->rec.name.name); |
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[ae5fe7e6] | 380 | rtems_rtl_unresolved_clean_block (block, rec, name_recs, |
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| 381 | unresolved->block_recs); |
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[8e7c72a7] | 382 | --index; |
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| 383 | next_rec = false; |
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[ae5fe7e6] | 384 | } |
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| 385 | } |
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| 386 | else if (rec->type == rtems_rtl_unresolved_reloc) |
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| 387 | { |
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[8e7c72a7] | 388 | if (rec->rec.reloc.obj == NULL) |
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[ae5fe7e6] | 389 | { |
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| 390 | rtems_rtl_unresolved_clean_block (block, rec, 1, |
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| 391 | unresolved->block_recs); |
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[8e7c72a7] | 392 | next_rec = false; |
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[ae5fe7e6] | 393 | } |
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| 394 | } |
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| 395 | |
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[8e7c72a7] | 396 | if (next_rec) |
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[ae5fe7e6] | 397 | rec = rtems_rtl_unresolved_rec_next (rec); |
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| 398 | } |
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| 399 | |
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| 400 | if (block->recs == 0) |
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| 401 | { |
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[8e7c72a7] | 402 | rtems_chain_node* next_node = rtems_chain_next (node); |
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| 403 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_UNRESOLVED)) |
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| 404 | printf ("rtl: unresolv: block-del %p\n", block); |
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[ae5fe7e6] | 405 | rtems_chain_extract (node); |
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[8e7c72a7] | 406 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_EXTERNAL, block); |
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| 407 | node = next_node; |
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| 408 | } |
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| 409 | else |
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| 410 | { |
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| 411 | node = rtems_chain_next (node); |
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[ae5fe7e6] | 412 | } |
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| 413 | } |
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| 414 | } |
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| 415 | } |
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| 416 | |
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| 417 | bool |
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[f59d435d] | 418 | rtems_rtl_unresolved_table_open (rtems_rtl_unresolved* unresolved, |
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| 419 | size_t block_recs) |
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[ae5fe7e6] | 420 | { |
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| 421 | unresolved->marker = 0xdeadf00d; |
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| 422 | unresolved->block_recs = block_recs; |
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| 423 | rtems_chain_initialize_empty (&unresolved->blocks); |
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| 424 | return true; |
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| 425 | } |
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| 426 | |
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| 427 | void |
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[f59d435d] | 428 | rtems_rtl_unresolved_table_close (rtems_rtl_unresolved* unresolved) |
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[ae5fe7e6] | 429 | { |
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| 430 | rtems_chain_node* node = rtems_chain_first (&unresolved->blocks); |
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| 431 | while (!rtems_chain_is_tail (&unresolved->blocks, node)) |
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| 432 | { |
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| 433 | rtems_chain_node* next = rtems_chain_next (node); |
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[89c59be] | 434 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_EXTERNAL, node); |
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[ae5fe7e6] | 435 | node = next; |
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| 436 | } |
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| 437 | } |
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| 438 | |
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| 439 | bool |
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[89c59be] | 440 | rtems_rtl_unresolved_iterate (rtems_rtl_unresolved_iterator iterator, |
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| 441 | void* data) |
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[ae5fe7e6] | 442 | { |
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[f59d435d] | 443 | rtems_rtl_unresolved* unresolved = rtems_rtl_unresolved_unprotected (); |
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[ae5fe7e6] | 444 | if (unresolved) |
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| 445 | { |
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| 446 | rtems_chain_node* node = rtems_chain_first (&unresolved->blocks); |
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| 447 | while (!rtems_chain_is_tail (&unresolved->blocks, node)) |
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| 448 | { |
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[f59d435d] | 449 | rtems_rtl_unresolv_block* block = (rtems_rtl_unresolv_block*) node; |
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| 450 | rtems_rtl_unresolv_rec* rec = rtems_rtl_unresolved_rec_first (block); |
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[ae5fe7e6] | 451 | |
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| 452 | while (!rtems_rtl_unresolved_rec_is_last (block, rec)) |
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| 453 | { |
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| 454 | if (iterator (rec, data)) |
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| 455 | return true; |
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| 456 | rec = rtems_rtl_unresolved_rec_next (rec); |
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| 457 | } |
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| 458 | |
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| 459 | node = rtems_chain_next (node); |
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| 460 | } |
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| 461 | } |
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| 462 | return false; |
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| 463 | } |
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| 464 | |
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| 465 | bool |
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[f59d435d] | 466 | rtems_rtl_unresolved_add (rtems_rtl_obj* obj, |
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| 467 | const uint16_t flags, |
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| 468 | const char* name, |
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| 469 | const uint16_t sect, |
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| 470 | const rtems_rtl_word* rel) |
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[ae5fe7e6] | 471 | { |
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[f59d435d] | 472 | rtems_rtl_unresolved* unresolved; |
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| 473 | rtems_chain_node* node; |
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| 474 | rtems_rtl_unresolv_block* block; |
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| 475 | rtems_rtl_unresolv_rec* rec; |
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| 476 | int name_index; |
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| 477 | size_t name_recs; |
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[ae5fe7e6] | 478 | |
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| 479 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_UNRESOLVED)) |
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| 480 | printf ("rtl: unresolv: add: %s(s:%d) -> %s\n", |
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| 481 | rtems_rtl_obj_oname (obj), sect, name); |
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| 482 | |
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[f59d435d] | 483 | unresolved = rtems_rtl_unresolved_unprotected (); |
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[ae5fe7e6] | 484 | if (!unresolved) |
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| 485 | return false; |
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| 486 | |
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| 487 | /* |
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| 488 | * Find the first block with a spare record. |
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| 489 | */ |
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| 490 | node = rtems_chain_first (&unresolved->blocks); |
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| 491 | block = NULL; |
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| 492 | while (!rtems_chain_is_tail (&unresolved->blocks, node)) |
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| 493 | { |
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[f59d435d] | 494 | block = (rtems_rtl_unresolv_block*) node; |
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[ae5fe7e6] | 495 | if (block->recs < unresolved->block_recs) |
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| 496 | break; |
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| 497 | block = NULL; |
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| 498 | node = rtems_chain_next (node); |
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| 499 | } |
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| 500 | |
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| 501 | /* |
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| 502 | * No blocks with any spare records, allocate a new block. |
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| 503 | */ |
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| 504 | if (!block) |
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| 505 | { |
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| 506 | block = rtems_rtl_unresolved_block_alloc (unresolved); |
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| 507 | if (!block) |
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| 508 | return false; |
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| 509 | } |
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| 510 | |
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| 511 | name_index = rtems_rtl_unresolved_find_name (unresolved, name, true); |
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[89c59be] | 512 | name_recs = rtems_rtl_unresolved_symbol_recs (name); |
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[ae5fe7e6] | 513 | |
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| 514 | /* |
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| 515 | * An index less than 0 means the name is present and "0 - index" is the next |
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| 516 | * index to use. |
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| 517 | */ |
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| 518 | if (name_index < 0) |
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| 519 | { |
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[f59d435d] | 520 | rtems_rtl_unresolv_block* name_block = block; |
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[ae5fe7e6] | 521 | |
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| 522 | /* |
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| 523 | * Is there enough room to fit the name ? It not add a new block. |
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| 524 | */ |
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| 525 | if (name_recs > (unresolved->block_recs - block->recs)) |
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| 526 | { |
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| 527 | name_block = rtems_rtl_unresolved_block_alloc (unresolved); |
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| 528 | if (!name_block) |
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| 529 | return false; |
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| 530 | } |
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| 531 | |
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| 532 | rec = rtems_rtl_unresolved_rec_first_free (name_block); |
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[89c59be] | 533 | rec->type = rtems_rtl_unresolved_symbol; |
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[ae5fe7e6] | 534 | rec->rec.name.refs = 1; |
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[89c59be] | 535 | rec->rec.name.flags = RTEMS_RTL_UNRESOLV_SYM_SEARCH_ARCHIVE; |
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[ae5fe7e6] | 536 | rec->rec.name.length = strlen (name) + 1; |
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| 537 | memcpy ((void*) &rec->rec.name.name[0], name, rec->rec.name.length + 1); |
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| 538 | block->recs += name_recs; |
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| 539 | name_index = 0 - name_index; |
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| 540 | |
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| 541 | /* |
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| 542 | * If the name block is the reloc block and it is full allocate a new |
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| 543 | * block for the relocation record. |
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| 544 | */ |
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| 545 | if ((block == name_block) && (block->recs >= unresolved->block_recs)) |
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| 546 | { |
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| 547 | block = rtems_rtl_unresolved_block_alloc (unresolved); |
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| 548 | if (!block) |
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| 549 | return false; |
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| 550 | } |
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| 551 | } |
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| 552 | |
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| 553 | rec = rtems_rtl_unresolved_rec_first_free (block); |
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| 554 | rec->type = rtems_rtl_unresolved_reloc; |
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| 555 | rec->rec.reloc.obj = obj; |
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| 556 | rec->rec.reloc.flags = flags; |
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| 557 | rec->rec.reloc.name = name_index; |
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| 558 | rec->rec.reloc.sect = sect; |
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| 559 | rec->rec.reloc.rel[0] = rel[0]; |
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| 560 | rec->rec.reloc.rel[1] = rel[1]; |
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| 561 | rec->rec.reloc.rel[2] = rel[2]; |
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| 562 | |
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| 563 | ++block->recs; |
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| 564 | |
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| 565 | return true; |
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| 566 | } |
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| 567 | |
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| 568 | void |
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| 569 | rtems_rtl_unresolved_resolve (void) |
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| 570 | { |
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[89c59be] | 571 | bool resolving = true; |
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| 572 | |
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[ae5fe7e6] | 573 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_UNRESOLVED)) |
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| 574 | printf ("rtl: unresolv: global resolve\n"); |
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[89c59be] | 575 | |
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| 576 | /* |
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| 577 | * The resolving process is two separate stages, The first stage is to |
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| 578 | * iterate over the unresolved symbols search the global symbol table. If a |
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| 579 | * symbol is found iterate over the unresolved relocation records for the |
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| 580 | * symbol fixing up the relocations. The second stage is to search the |
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| 581 | * archives for symbols we have not been search before and if a symbol if |
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| 582 | * found in an archve loaded the object file. Loading an object file stops |
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| 583 | * the search of the archives for symbols and stage one is performed |
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| 584 | * again. The process repeats until no more symbols are resolved. |
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| 585 | */ |
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| 586 | while (resolving) |
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| 587 | { |
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| 588 | rtems_rtl_unresolved_reloc_data rd = { |
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| 589 | .name = 0, |
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| 590 | .name_rec = NULL, |
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| 591 | .sym = NULL |
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| 592 | }; |
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| 593 | rtems_rtl_unresolved_archive_reloc_data ard = { |
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| 594 | .name = 0, |
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| 595 | .loaded = false, |
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| 596 | .archives = rtems_rtl_archives_unprotected () |
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| 597 | }; |
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| 598 | |
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| 599 | rtems_rtl_unresolved_iterate (rtems_rtl_unresolved_resolve_iterator, &rd); |
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| 600 | rtems_rtl_unresolved_compact (); |
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| 601 | rtems_rtl_unresolved_iterate (rtems_rtl_unresolved_archive_iterator, &ard); |
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| 602 | |
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| 603 | resolving = ard.loaded; |
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| 604 | } |
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| 605 | |
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[8e7c72a7] | 606 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_UNRESOLVED)) |
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| 607 | rtems_rtl_unresolved_dump (); |
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[ae5fe7e6] | 608 | } |
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| 609 | |
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| 610 | bool |
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[f59d435d] | 611 | rtems_rtl_unresolved_remove (rtems_rtl_obj* obj, |
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| 612 | const char* name, |
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| 613 | const uint16_t sect, |
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| 614 | const rtems_rtl_word* rel) |
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[ae5fe7e6] | 615 | { |
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[f59d435d] | 616 | rtems_rtl_unresolved* unresolved; |
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| 617 | unresolved = rtems_rtl_unresolved_unprotected (); |
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[ae5fe7e6] | 618 | if (!unresolved) |
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| 619 | return false; |
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| 620 | return false; |
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| 621 | } |
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[8e7c72a7] | 622 | |
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| 623 | /** |
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| 624 | * Struct to pass relocation data in the iterator. |
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| 625 | */ |
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| 626 | typedef struct rtems_rtl_unresolved_dump_data |
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| 627 | { |
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| 628 | size_t rec; |
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| 629 | size_t names; |
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| 630 | } rtems_rtl_unresolved_dump_data; |
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| 631 | |
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| 632 | static bool |
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| 633 | rtems_rtl_unresolved_dump_iterator (rtems_rtl_unresolv_rec* rec, |
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| 634 | void* data) |
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| 635 | { |
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| 636 | rtems_rtl_unresolved_dump_data* dd; |
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| 637 | dd = (rtems_rtl_unresolved_dump_data*) data; |
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| 638 | switch (rec->type) |
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| 639 | { |
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| 640 | case rtems_rtl_unresolved_empty: |
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| 641 | printf (" %03zu: 0: empty\n", dd->rec); |
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| 642 | break; |
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[89c59be] | 643 | case rtems_rtl_unresolved_symbol: |
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[8e7c72a7] | 644 | ++dd->names; |
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| 645 | printf (" %3zu: 1: name: %3d refs: %2d: %2d: %s\n", |
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| 646 | dd->rec, dd->names, |
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| 647 | rec->rec.name.refs, rec->rec.name.length, rec->rec.name.name); |
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| 648 | break; |
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| 649 | case rtems_rtl_unresolved_reloc: |
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| 650 | printf (" %3zu: 2: reloc: obj:%s name:%2d: sect:%d\n", |
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| 651 | dd->rec, |
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| 652 | rec->rec.reloc.obj->oname, |
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| 653 | rec->rec.reloc.name, |
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| 654 | rec->rec.reloc.sect); |
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| 655 | break; |
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| 656 | default: |
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| 657 | printf (" %03zu: %d: unknown\n", dd->rec, rec->type); |
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| 658 | break; |
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| 659 | } |
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| 660 | ++dd->rec; |
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| 661 | return false; |
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| 662 | } |
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| 663 | |
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[89c59be] | 664 | void |
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| 665 | rtems_rtl_unresolved_set_archive_search (void) |
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| 666 | { |
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| 667 | rtems_rtl_unresolved_iterate (rtems_rtl_unresolved_archive_search_iterator, |
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| 668 | NULL); |
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| 669 | } |
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| 670 | |
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[8e7c72a7] | 671 | void |
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| 672 | rtems_rtl_unresolved_dump (void) |
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| 673 | { |
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| 674 | rtems_rtl_unresolved_dump_data dd = { 0 }; |
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| 675 | printf ("RTL Unresolved data:\n"); |
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[89c59be] | 676 | rtems_rtl_unresolved_iterate (rtems_rtl_unresolved_dump_iterator, &dd); |
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[8e7c72a7] | 677 | } |
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