--- /dev/null
+/*
+ * Copyright (c) 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_SECT_H_
+#define _KXLD_SECT_H_
+
+#include <mach/machine.h>
+#include <sys/types.h>
+#if KERNEL
+ #include <libkern/kxld_types.h>
+#else
+ #include "kxld_types.h"
+#endif
+
+#include "kxld_array.h"
+
+struct kxld_array;
+struct kxld_relocator;
+struct kxld_reloc;
+struct kxld_seg;
+struct kxld_symtab;
+struct relocation_info;
+struct section;
+struct section_64;
+typedef struct kxld_sect KXLDSect;
+
+struct kxld_sect {
+ char sectname[16]; // The name of the section
+ char segname[16]; // The segment to which the section belongs
+ u_char *data; // The start of the section in memory
+ KXLDArray relocs; // The section's relocation entries
+ kxld_addr_t base_addr; // The base address of the section
+ kxld_addr_t link_addr; // The relocated address of the section
+ kxld_size_t size; // The size of the section
+ u_int sectnum; // The number of the section (for relocation)
+ u_int flags; // Flags describing the section
+ u_int align; // The section's alignment as a power of 2
+ u_int reserved1; // Dependent on the section type
+ u_int reserved2; // Dependent on the section type
+ boolean_t allocated; // This section's data is allocated internally
+};
+
+/*******************************************************************************
+* Constructors and destructors
+*******************************************************************************/
+
+#if KXLD_USER_OR_ILP32
+/* Initializes a section object from a Mach-O section header and modifies the
+ * section offset to point to the next section header.
+ */
+kern_return_t kxld_sect_init_from_macho_32(KXLDSect *sect, u_char *macho,
+ u_long *sect_offset, u_int sectnum, const struct kxld_relocator *relocator)
+ __attribute__((nonnull, visibility("hidden")));
+#endif /* KXLD_USER_OR_ILP32 */
+
+#if KXLD_USER_OR_LP64
+/* Initializes a section object from a Mach-O64 section header and modifies the
+ * section offset to point to the next section header.
+ */
+kern_return_t kxld_sect_init_from_macho_64(KXLDSect *sect, u_char *macho,
+ u_long *sect_offset, u_int sectnum, const struct kxld_relocator *relocator)
+ __attribute__((nonnull, visibility("hidden")));
+#endif /* KXLD_USER_OR_LP64 */
+
+#if KXLD_USER_OR_GOT
+/* Initializes a GOT section from the number of entries that the section should
+ * have.
+ */
+kern_return_t kxld_sect_init_got(KXLDSect *sect, u_int ngots)
+ __attribute__((nonnull, visibility("hidden")));
+#endif /* KXLD_USER_OR_GOT */
+
+#if KXLD_USER_OR_COMMON
+/* Initializes a zerofill section of the specified size and alignment */
+void kxld_sect_init_zerofill(KXLDSect *sect, const char *segname,
+ const char *sectname, kxld_size_t size, u_int align)
+ __attribute__((nonnull, visibility("hidden")));
+#endif /* KXLD_USER_OR_COMMON */
+
+/* Clears the section object */
+void kxld_sect_clear(KXLDSect *sect)
+ __attribute__((nonnull, visibility("hidden")));
+
+/* Denitializes the section object and frees its array of relocs */
+void kxld_sect_deinit(KXLDSect *sect)
+ __attribute__((nonnull, visibility("hidden")));
+
+/*******************************************************************************
+* Accessors
+*******************************************************************************/
+
+/* Gets the number of relocation entries in the section */
+u_int kxld_sect_get_num_relocs(const KXLDSect *sect)
+ __attribute__((pure, nonnull, visibility("hidden")));
+
+/* Returns the address parameter adjusted to the minimum alignment required by
+ * the section.
+ */
+kxld_addr_t kxld_sect_align_address(const KXLDSect *sect, kxld_addr_t address)
+ __attribute__((pure, nonnull, visibility("hidden")));
+
+/* Returns the space required by the exported Mach-O header */
+u_long kxld_sect_get_macho_header_size(boolean_t is_32_bit)
+ __attribute__((const, nonnull, visibility("hidden")));
+
+/* Returns the space required by the exported Mach-O data */
+u_long kxld_sect_get_macho_data_size(const KXLDSect *sect)
+ __attribute__((pure, nonnull, visibility("hidden")));
+
+#if KXLD_USER_OR_LP64
+/* Returns the number of GOT entries required by relocation entries in the
+ * given section.
+ */
+u_int kxld_sect_get_ngots(const KXLDSect *sect,
+ const struct kxld_relocator *relocator, const struct kxld_symtab *symtab)
+ __attribute__((pure, nonnull, visibility("hidden")));
+#endif /* KXLD_USER_OR_LP64 */
+
+kern_return_t kxld_sect_export_macho_to_file_buffer(const KXLDSect *sect, u_char *buf,
+ u_long *header_offset, u_long header_size, u_long *data_offset,
+ u_long data_size, boolean_t is_32_bit)
+ __attribute__((nonnull, visibility("hidden")));
+
+kern_return_t kxld_sect_export_macho_to_vm(const KXLDSect *sect, u_char *buf,
+ u_long *header_offset, u_long header_size,
+ kxld_addr_t link_addr, u_long data_size,
+ boolean_t is_32_bit)
+ __attribute__((nonnull, visibility("hidden")));
+
+/*******************************************************************************
+* Mutators
+*******************************************************************************/
+
+/* Relocates the section to the given link address */
+void kxld_sect_relocate(KXLDSect *sect, kxld_addr_t link_addr)
+ __attribute__((nonnull, visibility("hidden")));
+
+#if KXLD_USER_OR_COMMON
+/* Adds a number of bytes to the section's size. Returns the size of the
+ * section before it was grown.
+ */
+kxld_size_t kxld_sect_grow(KXLDSect *sect, kxld_size_t nbytes, u_int align)
+ __attribute__((nonnull, visibility("hidden")));
+#endif /* KXLD_USER_OR_COMMON */
+
+#if KXLD_USER_OR_GOT
+/* Popluates the entries of a GOT section */
+kern_return_t kxld_sect_populate_got(KXLDSect *sect, struct kxld_symtab *symtab,
+ boolean_t swap)
+ __attribute__((nonnull, visibility("hidden")));
+#endif /* KXLD_USER_OR_GOT */
+
+/* Processes all of a section's relocation entries */
+kern_return_t kxld_sect_process_relocs(KXLDSect *sect,
+ const struct kxld_relocator *relocator, const KXLDArray *sectarray,
+ const struct kxld_symtab *symtab)
+ __attribute__((nonnull, visibility("hidden")));
+
+#endif /* _KXLD_SECT_H_ */
+
projects / apple / xnu.git / blobdiff