FreeBSD/Linux Kernel Cross Reference
sys/libkern/kxld/kxld_reloc.h

     /*
      * Copyright (c) 2007-2008 Apple Inc. All rights reserved.
      *
      * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
      * Version 2.0 (the 'License'). You may not use this file except in
      * compliance with the License. The rights granted to you under the License
     * may not be used to create, or enable the creation or redistribution of,
     * unlawful or unlicensed copies of an Apple operating system, or to
     * circumvent, violate, or enable the circumvention or violation of, any
     * terms of an Apple operating system software license agreement.
     * 
     * Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
     */
    #ifndef _KXLD_RELOC_H
    #define _KXLD_RELOC_H
    
    #include <mach/machine.h>
    #include <sys/types.h>
    #if KERNEL
        #include <libkern/kxld_types.h>
    #else
        #include "kxld_types.h"
    #endif
    
    struct kxld_array;
    struct kxld_sym;
    struct kxld_symtab;
    typedef struct kxld_relocator KXLDRelocator;
    typedef struct kxld_reloc KXLDReloc;
    
    typedef boolean_t (*RelocHasPair)(u_int r_type);
    typedef boolean_t (*RelocIsPair)(u_int r_type, u_int prev_r_type);
    typedef boolean_t (*RelocHasGot)(u_int r_type);
    typedef kern_return_t(*ProcessReloc)(u_char *instruction, u_int length, u_int pcrel, 
        kxld_addr_t base_pc, kxld_addr_t link_pc, kxld_addr_t link_disp, u_int type, 
        kxld_addr_t target, kxld_addr_t pair_target, boolean_t swap);
    
    struct kxld_relocator {
        RelocHasPair reloc_has_pair;
        RelocIsPair reloc_is_pair;
        RelocHasGot reloc_has_got;
        ProcessReloc process_reloc;
        boolean_t is_32_bit;
        boolean_t swap;
    };
    
    struct kxld_reloc {
        u_int address;
        u_int target;
        u_int pair_target;
        u_int target_type:3;
        u_int pair_target_type:3;
        u_int reloc_type:4;
        u_int length:2;
        u_int pcrel:1;
    };
    
    struct kxld_array;
    struct kxld_sect;
    struct kxld_seg;
    struct kxld_symtab;
    struct relocation_info;
    
    /*******************************************************************************
    * Constructors and Destructors
    *******************************************************************************/
    
    kern_return_t kxld_relocator_init(KXLDRelocator *relocator, cpu_type_t cputype,
        cpu_subtype_t cpusubtype, boolean_t swap)
        __attribute__((nonnull,visibility("hidden")));
    
    kern_return_t kxld_reloc_create_macho(struct kxld_array *relocarray,
        const KXLDRelocator *relocator, const struct relocation_info *srcs, 
        u_int nsrcs) __attribute__((nonnull, visibility("hidden")));
    
    void kxld_relocator_clear(KXLDRelocator *relocator)
        __attribute__((nonnull, visibility("hidden")));
    
    /*******************************************************************************
    * Accessors
    *******************************************************************************/
    
    boolean_t kxld_relocator_has_pair(const KXLDRelocator *relocator, u_int r_type)
        __attribute__((pure, nonnull,visibility("hidden")));
    
   boolean_t kxld_relocator_is_pair(const KXLDRelocator *relocator, u_int r_type, 
       u_int last_r_type)
       __attribute__((pure, nonnull,visibility("hidden")));
   
   boolean_t kxld_relocator_has_got(const KXLDRelocator *relocator, u_int r_type)
       __attribute__((pure, nonnull,visibility("hidden")));
   
   struct kxld_sym * kxld_reloc_get_symbol(const KXLDRelocator *relocator,
       const KXLDReloc *reloc, u_char *data, 
       const struct kxld_symtab *symtab)
       __attribute__((pure, nonnull(1,2,4), visibility("hidden")));
   
   kern_return_t kxld_reloc_get_reloc_index_by_offset(const struct kxld_array *relocs, 
       kxld_size_t offset, u_int *idx)
       __attribute__((nonnull, visibility("hidden")));
   
   KXLDReloc * kxld_reloc_get_reloc_by_offset(const struct kxld_array *relocs, 
       kxld_addr_t offset)
       __attribute__((pure, nonnull, visibility("hidden")));
   
   /*******************************************************************************
   * Modifiers
   *******************************************************************************/
   
   kern_return_t kxld_reloc_update_symindex(KXLDReloc *reloc, u_int symindex)
       __attribute__((nonnull,visibility("hidden")));
   
   kern_return_t kxld_relocator_process_sect_reloc(const KXLDRelocator *relocator,
       const KXLDReloc *reloc, const struct kxld_sect *sect,
       const struct kxld_array *sectarray, const struct kxld_symtab *symtab)
       __attribute__((nonnull,visibility("hidden")));
   
   kern_return_t kxld_relocator_process_table_reloc(const KXLDRelocator *relocator,
       const KXLDReloc *reloc, const struct kxld_seg *seg, u_char *file, 
       const struct kxld_array *sectarray, 
       const struct kxld_symtab *symtab)
       __attribute__((nonnull,visibility("hidden")));
   
   #endif /* _KXLD_RELOC_H */
   

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