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