/* * 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 #include #if KERNEL #include #else #include "kxld_types.h" #endif struct kxld_array; struct kxld_dict; struct kxld_sect; struct kxld_seg; struct kxld_sym; struct kxld_symtab; struct kxld_vtable; struct relocation_info; typedef struct kxld_relocator KXLDRelocator; typedef struct kxld_reloc KXLDReloc; typedef boolean_t (*RelocHasPair)(u_int r_type); typedef u_int (*RelocGetPairType)(u_int prev_r_type); typedef boolean_t (*RelocHasGot)(u_int r_type); typedef kern_return_t(*ProcessReloc)(const KXLDRelocator *relocator, 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; RelocGetPairType reloc_get_pair_type; RelocHasGot reloc_has_got; ProcessReloc process_reloc; const struct kxld_symtab *symtab; const struct kxld_array *sectarray; const struct kxld_dict *vtables; const struct kxld_vtable *current_vtable; u_char *file; u_int function_align; /* Power of two alignment of functions */ boolean_t is_32_bit; boolean_t swap; boolean_t may_scatter; }; struct kxld_reloc { u_int address; u_int pair_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; }; /******************************************************************************* * Constructors and Destructors *******************************************************************************/ kern_return_t kxld_relocator_init(KXLDRelocator *relocator, u_char *file, const struct kxld_symtab *symtab, const struct kxld_array *sectarray, 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"))); u_int kxld_relocator_get_pair_type(const KXLDRelocator *relocator, 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"))); kxld_addr_t kxld_relocator_get_pointer_at_addr(const KXLDRelocator *relocator, const u_char *data, u_long offset) __attribute__((pure, nonnull,visibility("hidden"))); struct kxld_sym * kxld_reloc_get_symbol(const KXLDRelocator *relocator, const KXLDReloc *reloc, const u_char *data) __attribute__((pure, nonnull(1,2), 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"))); #if KXLD_PIC_KEXTS u_long kxld_reloc_get_macho_header_size(void) __attribute__((pure, visibility("hidden"))); u_long kxld_reloc_get_macho_data_size(const struct kxld_array *locrelocs, const struct kxld_array *extrelocs) __attribute__((pure, nonnull, visibility("hidden"))); kern_return_t kxld_reloc_export_macho(const KXLDRelocator *relocator, const struct kxld_array *locrelocs, const struct kxld_array *extrelocs, u_char *buf, u_long *header_offset, u_long header_size, u_long *data_offset, u_long size) __attribute__((nonnull, visibility("hidden"))); #endif /* KXLD_PIC_KEXTS */ /******************************************************************************* * Modifiers *******************************************************************************/ kern_return_t kxld_reloc_update_symindex(KXLDReloc *reloc, u_int symindex) __attribute__((nonnull,visibility("hidden"))); void kxld_relocator_set_vtables(KXLDRelocator *relocator, const struct kxld_dict *vtables) __attribute__((nonnull,visibility("hidden"))); kern_return_t kxld_relocator_process_sect_reloc(KXLDRelocator *relocator, const KXLDReloc *reloc, const struct kxld_sect *sect) __attribute__((nonnull,visibility("hidden"))); kern_return_t kxld_relocator_process_table_reloc(KXLDRelocator *relocator, const KXLDReloc *reloc, const struct kxld_seg *seg, kxld_addr_t link_addr) __attribute__((nonnull,visibility("hidden"))); #endif /* _KXLD_RELOC_H */