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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libiberty/] [simple-object-common.h] - Rev 839
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/* simple-object-common.h -- common structs for object file manipulation. Copyright (C) 2010 Free Software Foundation, Inc. This file is part of the libiberty library. Libiberty is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. Libiberty is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with libiberty; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ /* Forward reference. */ struct simple_object_functions; /* An object file opened for reading. */ struct simple_object_read_struct { /* The file descriptor. */ int descriptor; /* The offset within the file. */ off_t offset; /* The functions which do the actual work. */ const struct simple_object_functions *functions; /* Private data for the object file format. */ void *data; }; /* Object file attributes. */ struct simple_object_attributes_struct { /* The functions which do the actual work. */ const struct simple_object_functions *functions; /* Private data for the object file format. */ void *data; }; /* An object file being created. */ struct simple_object_write_struct { /* The functions which do the actual work. */ const struct simple_object_functions *functions; /* The segment_name argument from the user. */ char *segment_name; /* The start of the list of sections. */ simple_object_write_section *sections; /* The last entry in the list of sections. */ simple_object_write_section *last_section; /* Private data for the object file format. */ void *data; }; /* A section in an object file being created. */ struct simple_object_write_section_struct { /* Next in the list of sections attached to an simple_object_write. */ simple_object_write_section *next; /* The name of this section. */ char *name; /* The required alignment. */ unsigned int align; /* The first data attached to this section. */ struct simple_object_write_section_buffer *buffers; /* The last data attached to this section. */ struct simple_object_write_section_buffer *last_buffer; }; /* Data attached to a section. */ struct simple_object_write_section_buffer { /* The next data for this section. */ struct simple_object_write_section_buffer *next; /* The size of the buffer. */ size_t size; /* The actual bytes. */ const void *buffer; /* A buffer to free, or NULL. */ void *free_buffer; }; /* The number of bytes we read from the start of the file to pass to the match function. */ #define SIMPLE_OBJECT_MATCH_HEADER_LEN (16) /* Format-specific object file functions. */ struct simple_object_functions { /* If this file matches these functions, return a new value for the private data for an simple_object_read. HEADER is the first 16 bytes of the file. DESCRIPTOR, OFFSET, SEGMENT_NAME, ERRMSG, and ERR are as for simple_object_open_read. If this file does not match, this function should return NULL with *ERRMSG set to NULL. */ void *(*match) (unsigned char header[SIMPLE_OBJECT_MATCH_HEADER_LEN], int descriptor, off_t offset, const char *segment_name, const char **errmsg, int *err); /* Implement simple_object_find_sections. */ const char *(*find_sections) (simple_object_read *, int (*pfn) (void *, const char *, off_t offset, off_t length), void *data, int *err); /* Return the private data for the attributes for SOBJ. */ void *(*fetch_attributes) (simple_object_read *sobj, const char **errmsg, int *err); /* Release the private data for an simple_object_read. */ void (*release_read) (void *); /* Merge the private data for the attributes of two files. If they could be linked together, return NULL. Otherwise return an error message. */ const char *(*attributes_merge) (void *, void *, int *err); /* Release the private data for an simple_object_attributes. */ void (*release_attributes) (void *); /* Start creating an object file. */ void *(*start_write) (void *attributes_data, const char **errmsg, int *err); /* Write the complete object file. */ const char *(*write_to_file) (simple_object_write *sobj, int descriptor, int *err); /* Release the private data for an simple_object_write. */ void (*release_write) (void *); }; /* The known object file formats. */ extern const struct simple_object_functions simple_object_coff_functions; extern const struct simple_object_functions simple_object_elf_functions; extern const struct simple_object_functions simple_object_mach_o_functions; /* Read SIZE bytes from DESCRIPTOR at file offset OFFSET into BUFFER. Return non-zero on success. On failure return 0 and set *ERRMSG and *ERR. */ extern int simple_object_internal_read (int descriptor, off_t offset, unsigned char *buffer, size_t size, const char **errmsg, int *err); /* Write SIZE bytes from BUFFER to DESCRIPTOR at file offset OFFSET. Return non-zero on success. On failure return 0 and set *ERRMSG and *ERR. */ extern int simple_object_internal_write (int descriptor, off_t offset, const unsigned char *buffer, size_t size, const char **errmsg, int *err); /* Define ulong_type as an unsigned 64-bit type if available. Otherwise just make it unsigned long. */ #ifdef UNSIGNED_64BIT_TYPE __extension__ typedef UNSIGNED_64BIT_TYPE ulong_type; #else typedef unsigned long ulong_type; #endif /* Fetch a big-endian 16-bit value. */ static inline unsigned short simple_object_fetch_big_16 (const unsigned char *buf) { return ((unsigned short) buf[0] << 8) | (unsigned short) buf[1]; } /* Fetch a little-endian 16-bit value. */ static inline unsigned short simple_object_fetch_little_16 (const unsigned char *buf) { return ((unsigned short) buf[1] << 8) | (unsigned short) buf[0]; } /* Fetch a big-endian 32-bit value. */ static inline unsigned int simple_object_fetch_big_32 (const unsigned char *buf) { return (((unsigned int) buf[0] << 24) | ((unsigned int) buf[1] << 16) | ((unsigned int) buf[2] << 8) | (unsigned int) buf[3]); } /* Fetch a little-endian 32-bit value. */ static inline unsigned int simple_object_fetch_little_32 (const unsigned char *buf) { return (((unsigned int) buf[3] << 24) | ((unsigned int) buf[2] << 16) | ((unsigned int) buf[1] << 8) | (unsigned int) buf[0]); } /* Fetch a big-endian 32-bit value as a ulong_type. */ static inline ulong_type simple_object_fetch_big_32_ulong (const unsigned char *buf) { return (ulong_type) simple_object_fetch_big_32 (buf); } /* Fetch a little-endian 32-bit value as a ulong_type. */ static inline ulong_type simple_object_fetch_little_32_ulong (const unsigned char *buf) { return (ulong_type) simple_object_fetch_little_32 (buf); } #ifdef UNSIGNED_64BIT_TYPE /* Fetch a big-endian 64-bit value. */ static inline ulong_type simple_object_fetch_big_64 (const unsigned char *buf) { return (((ulong_type) buf[0] << 56) | ((ulong_type) buf[1] << 48) | ((ulong_type) buf[2] << 40) | ((ulong_type) buf[3] << 32) | ((ulong_type) buf[4] << 24) | ((ulong_type) buf[5] << 16) | ((ulong_type) buf[6] << 8) | (ulong_type) buf[7]); } /* Fetch a little-endian 64-bit value. */ static inline ulong_type simple_object_fetch_little_64 (const unsigned char *buf) { return (((ulong_type) buf[7] << 56) | ((ulong_type) buf[6] << 48) | ((ulong_type) buf[5] << 40) | ((ulong_type) buf[4] << 32) | ((ulong_type) buf[3] << 24) | ((ulong_type) buf[2] << 16) | ((ulong_type) buf[1] << 8) | (ulong_type) buf[0]); } #endif /* Store a big-endian 16-bit value. */ static inline void simple_object_set_big_16 (unsigned char *buf, unsigned short val) { buf[0] = (val >> 8) & 0xff; buf[1] = val & 0xff; } /* Store a little-endian 16-bit value. */ static inline void simple_object_set_little_16 (unsigned char *buf, unsigned short val) { buf[1] = (val >> 8) & 0xff; buf[0] = val & 0xff; } /* Store a big-endian 32-bit value. */ static inline void simple_object_set_big_32 (unsigned char *buf, unsigned int val) { buf[0] = (val >> 24) & 0xff; buf[1] = (val >> 16) & 0xff; buf[2] = (val >> 8) & 0xff; buf[3] = val & 0xff; } /* Store a little-endian 32-bit value. */ static inline void simple_object_set_little_32 (unsigned char *buf, unsigned int val) { buf[3] = (val >> 24) & 0xff; buf[2] = (val >> 16) & 0xff; buf[1] = (val >> 8) & 0xff; buf[0] = val & 0xff; } /* Store a big-endian 32-bit value coming in as a ulong_type. */ static inline void simple_object_set_big_32_ulong (unsigned char *buf, ulong_type val) { simple_object_set_big_32 (buf, val); } /* Store a little-endian 32-bit value coming in as a ulong_type. */ static inline void simple_object_set_little_32_ulong (unsigned char *buf, ulong_type val) { simple_object_set_little_32 (buf, val); } #ifdef UNSIGNED_64BIT_TYPE /* Store a big-endian 64-bit value. */ static inline void simple_object_set_big_64 (unsigned char *buf, ulong_type val) { buf[0] = (val >> 56) & 0xff; buf[1] = (val >> 48) & 0xff; buf[2] = (val >> 40) & 0xff; buf[3] = (val >> 32) & 0xff; buf[4] = (val >> 24) & 0xff; buf[5] = (val >> 16) & 0xff; buf[6] = (val >> 8) & 0xff; buf[7] = val & 0xff; } /* Store a little-endian 64-bit value. */ static inline void simple_object_set_little_64 (unsigned char *buf, ulong_type val) { buf[7] = (val >> 56) & 0xff; buf[6] = (val >> 48) & 0xff; buf[5] = (val >> 40) & 0xff; buf[4] = (val >> 32) & 0xff; buf[3] = (val >> 24) & 0xff; buf[2] = (val >> 16) & 0xff; buf[1] = (val >> 8) & 0xff; buf[0] = val & 0xff; } #endif
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