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Diffstat (limited to 'cpukit/libdl/rtl-unresolved.h')
| -rw-r--r-- | cpukit/libdl/rtl-unresolved.h | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/cpukit/libdl/rtl-unresolved.h b/cpukit/libdl/rtl-unresolved.h deleted file mode 100644 index bd4ce2a215..0000000000 --- a/cpukit/libdl/rtl-unresolved.h +++ /dev/null @@ -1,212 +0,0 @@ -/* - * COPYRIGHT (c) 2012 Chris Johns <chrisj@rtems.org> - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ -/** - * @file - * - * @ingroup rtems_rtl - * - * @brief RTEMS Run-Time Linker Object File Unresolved Relocations Table. - * - * The unresolved relocation table holds relocations in a loaded object file - * which reference unresolved external symbols. The support is needed to allow - * dependent object files to load. In the case of dependent object files one - * will have unresolved externals until the dependent object file is also - * loaded. There is no load order that resolves this. - * - * The unresolved relocation table is a single table used by all object files - * with unresolved symbols. It made of blocks linked together where blocks are - * allocated as requiered. The table is always maintained compacted. That is as - * relocations are resolved and removed the table is compacted. The only - * pointer in the table is the object file poniter. This is used to identify - * which object the relocation belongs to. There are no linking or back - * pointers in the unresolved relocations table. The table is scanned for each - * object file's relocations. This is not fast but the table should be small - * and if it happens to grow large you have other more pressing issues to - * resolve in your application. - * - * The table holds two (2) types of records: - * - * # Symbol name strings. - * # Relocations. - * - * The symbol name a relocation references is held in a specific symbol name - * string record in the table the relocation record references. The record - * counts the number of references and the string is removed from the table - * when the reference count reaches 0. There can be many relocations - * referencing the symbol. The strings are referenced by a single 16bit - * unsigned integer which is the count of the string in the table. - * - * The section the relocation is for in the object is the section number. The - * relocation data is series of machine word sized fields: - * - * # Offset in the section. - * # Relocation info (format specific) - * # Additional format specific data. - */ - -#if !defined (_RTEMS_RTL_UNRESOLVED_H_) -#define _RTEMS_RTL_UNRESOLVED_H_ - -#include <rtems.h> -#include "rtl-obj-fwd.h" - -#ifdef __cplusplus -extern "C" { -#endif /* __cplusplus */ - -/** - * Hack to work around machine size. This needs to be cleaned up - * to better support 64bit targets. - */ -typedef uint32_t rtems_rtl_word_t; - -/** - * The types of records in the blocks. - */ -typedef enum rtems_rtl_unresolved_rtype_e -{ - rtems_rtl_unresolved_empty = 0, /**< The records is empty. Must always be 0 */ - rtems_rtl_unresolved_name = 1, /**< The record is a name. */ - rtems_rtl_unresolved_reloc = 2 /**< The record is a relocation record. */ -} rtems_rtl_unresolved_rtype_t; - -/** - * Unresolved externals symbol names. The names are reference counted and - * separate from the relocation records because a number of records could - * reference the same symbol name. - */ -typedef struct rtems_rtl_unresolv_name_s -{ - uint16_t refs; /**< The number of references to this name. */ - uint16_t length; /**< The length of this name. */ - const char name[12]; /**< The symbol name. */ -} rtems_rtl_unresolv_name_t; - -/** - * Unresolved externals symbols require the relocation records to be held - * and references. - */ -typedef struct rtems_rtl_unresolv_reloc_s -{ - rtems_rtl_obj_t* obj; /**< The relocation's object file. */ - uint16_t flags; /**< Format specific flags. */ - uint16_t name; /**< The symbol's name. */ - uint16_t sect; /**< The target section. */ - rtems_rtl_word_t rel[3]; /**< Relocation record. */ -} rtems_rtl_unresolv_reloc_t; - -/** - * Unresolved externals records. - */ -typedef struct rtems_rtl_unresolv_rec_s -{ - rtems_rtl_unresolved_rtype_t type; - union - { - rtems_rtl_unresolv_name_t name; /**< The name, or */ - rtems_rtl_unresolv_reloc_t reloc; /**< the relocation record. */ - } rec; -} rtems_rtl_unresolv_rec_t; - -/** - * Unresolved blocks. - */ -typedef struct rtems_rtl_unresolv_block_s -{ - rtems_chain_node link; /**< Blocks are chained. */ - uint32_t recs; /**< The number of records in the block. */ - rtems_rtl_unresolv_rec_t rec; /**< The records. More follow. */ -} rtems_rtl_unresolv_block_t; - -/** - * Unresolved table holds the names and relocations. - */ -typedef struct rtems_rtl_unresolved_s -{ - uint32_t marker; - size_t block_recs; /**< The records per blocks allocated. */ - rtems_chain_control blocks; /**< List of blocks. */ -} rtems_rtl_unresolved_t; - -/** - * The iterator function used to iterate over the unresolved table. - * - * @param rec The current iterator. - * @param data The user data. - * @retval true The iterator has finished. - * @retval false The iterator has not finished. Keep iterating. - */ -typedef bool rtems_rtl_unresolved_iterator_t (rtems_rtl_unresolv_rec_t* rec, - void* data); - -/** - * Open an unresolved relocation table. - * - * @param unresolv The unresolved table to open. - * @param block_records The number of records per block allocated. - * @retval true The table is open. - * @retval false The unresolved relocation table could not created. The RTL - * error has the error. - */ -bool rtems_rtl_unresolved_table_open (rtems_rtl_unresolved_t* unresolved, - size_t block_records); - -/** - * Close the table and erase the blocks. - * - * @param unreolved Close the unresolved table. - */ -void rtems_rtl_unresolved_table_close (rtems_rtl_unresolved_t* unresolved); - -/** - * Iterate over the table of unresolved entries. - */ -bool rtems_rtl_unresolved_interate (rtems_rtl_unresolved_iterator_t iterator, - void* data); - -/** - * Add a relocation to the list of unresolved relocations. - * - * @param unresolved The unresolved symbol table. - * @param obj The object table the symbols are for. - * @param flags Format specific flags. - * @param name The symbol name the relocation references. - * @param sect The target section number the relocation references. - * @param rel The format specific relocation data. - * @retval true The relocation has been added. - * @retval false The relocation could not be added. - */ -bool rtems_rtl_unresolved_add (rtems_rtl_obj_t* obj, - const uint16_t flags, - const char* name, - const uint16_t sect, - const rtems_rtl_word_t* rel); - -/** - * Resolve the unresolved symbols. - */ -void rtems_rtl_unresolved_resolve (void); - -/** - * Remove a relocation from the list of unresolved relocations. - * - * @param unresolved The unresolved symbol table. - * @param obj The object table the symbols are for. - * @param esyms The exported symbol table. - * @param size The size of the table in bytes. - */ -bool rtems_rtl_unresolved_remove (rtems_rtl_obj_t* obj, - const char* name, - const uint16_t sect, - const rtems_rtl_word_t* rel); - -#ifdef __cplusplus -} -#endif /* __cplusplus */ - -#endif |