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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libiberty/] [simple-object-common.h] - Blame information for rev 736

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1 736 jeremybenn
/* simple-object-common.h -- common structs for object file manipulation.
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   Copyright (C) 2010 Free Software Foundation, Inc.
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This file is part of the libiberty library.
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Libiberty is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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Libiberty is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with libiberty; see the file COPYING.LIB.  If not,
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write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA.  */
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/* Forward reference.  */
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struct simple_object_functions;
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/* An object file opened for reading.  */
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struct simple_object_read_struct
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{
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  /* The file descriptor.  */
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  int descriptor;
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  /* The offset within the file.  */
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  off_t offset;
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  /* The functions which do the actual work.  */
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  const struct simple_object_functions *functions;
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  /* Private data for the object file format.  */
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  void *data;
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};
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/* Object file attributes.  */
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struct simple_object_attributes_struct
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{
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  /* The functions which do the actual work.  */
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  const struct simple_object_functions *functions;
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  /* Private data for the object file format.  */
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  void *data;
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};
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/* An object file being created.  */
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struct simple_object_write_struct
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{
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  /* The functions which do the actual work.  */
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  const struct simple_object_functions *functions;
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  /* The segment_name argument from the user.  */
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  char *segment_name;
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  /* The start of the list of sections.  */
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  simple_object_write_section *sections;
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  /* The last entry in the list of sections.  */
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  simple_object_write_section *last_section;
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  /* Private data for the object file format.  */
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  void *data;
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};
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/* A section in an object file being created.  */
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struct simple_object_write_section_struct
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{
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  /* Next in the list of sections attached to an
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     simple_object_write.  */
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  simple_object_write_section *next;
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  /* The name of this section.  */
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  char *name;
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  /* The required alignment.  */
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  unsigned int align;
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  /* The first data attached to this section.  */
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  struct simple_object_write_section_buffer *buffers;
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  /* The last data attached to this section.  */
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  struct simple_object_write_section_buffer *last_buffer;
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};
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/* Data attached to a section.  */
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struct simple_object_write_section_buffer
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{
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  /* The next data for this section.  */
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  struct simple_object_write_section_buffer *next;
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  /* The size of the buffer.  */
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  size_t size;
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  /* The actual bytes.  */
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  const void *buffer;
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  /* A buffer to free, or NULL.  */
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  void *free_buffer;
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};
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/* The number of bytes we read from the start of the file to pass to
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   the match function.  */
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#define SIMPLE_OBJECT_MATCH_HEADER_LEN (16)
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/* Format-specific object file functions.  */
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struct simple_object_functions
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{
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  /* If this file matches these functions, return a new value for the
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     private data for an simple_object_read.  HEADER is the first 16
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     bytes of the file.  DESCRIPTOR, OFFSET, SEGMENT_NAME, ERRMSG, and
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     ERR are as for simple_object_open_read.  If this file does not
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     match, this function should return NULL with *ERRMSG set to
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     NULL.  */
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  void *(*match) (unsigned char header[SIMPLE_OBJECT_MATCH_HEADER_LEN],
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                  int descriptor, off_t offset, const char *segment_name,
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                  const char **errmsg, int *err);
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  /* Implement simple_object_find_sections.  */
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  const char *(*find_sections) (simple_object_read *,
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                                int (*pfn) (void *, const char *,
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                                            off_t offset, off_t length),
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                                void *data,
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                                int *err);
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  /* Return the private data for the attributes for SOBJ.  */
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  void *(*fetch_attributes) (simple_object_read *sobj, const char **errmsg,
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                             int *err);
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  /* Release the private data for an simple_object_read.  */
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  void (*release_read) (void *);
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  /* Merge the private data for the attributes of two files.  If they
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     could be linked together, return NULL.  Otherwise return an error
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     message.  */
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  const char *(*attributes_merge) (void *, void *, int *err);
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  /* Release the private data for an simple_object_attributes.  */
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  void (*release_attributes) (void *);
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  /* Start creating an object file.  */
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  void *(*start_write) (void *attributes_data, const char **errmsg,
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                        int *err);
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  /* Write the complete object file.  */
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  const char *(*write_to_file) (simple_object_write *sobj, int descriptor,
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                                int *err);
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  /* Release the private data for an simple_object_write.  */
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  void (*release_write) (void *);
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};
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/* The known object file formats.  */
147
 
148
extern const struct simple_object_functions simple_object_coff_functions;
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extern const struct simple_object_functions simple_object_elf_functions;
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extern const struct simple_object_functions simple_object_mach_o_functions;
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/* Read SIZE bytes from DESCRIPTOR at file offset OFFSET into BUFFER.
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   Return non-zero on success.  On failure return 0 and set *ERRMSG
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   and *ERR.  */
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extern int
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simple_object_internal_read (int descriptor, off_t offset,
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                             unsigned char *buffer, size_t size,
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                             const char **errmsg, int *err);
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/* Write SIZE bytes from BUFFER to DESCRIPTOR at file offset OFFSET.
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   Return non-zero on success.  On failure return 0 and set *ERRMSG
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   and *ERR.  */
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165
extern int
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simple_object_internal_write (int descriptor, off_t offset,
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                              const unsigned char *buffer, size_t size,
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                              const char **errmsg, int *err);
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170
/* Define ulong_type as an unsigned 64-bit type if available.
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   Otherwise just make it unsigned long.  */
172
 
173
#ifdef UNSIGNED_64BIT_TYPE
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__extension__ typedef UNSIGNED_64BIT_TYPE ulong_type;
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#else
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typedef unsigned long ulong_type;
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#endif
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/* Fetch a big-endian 16-bit value.  */
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181
static inline unsigned short
182
simple_object_fetch_big_16 (const unsigned char *buf)
183
{
184
  return ((unsigned short) buf[0] << 8) | (unsigned short) buf[1];
185
}
186
 
187
/* Fetch a little-endian 16-bit value.  */
188
 
189
static inline unsigned short
190
simple_object_fetch_little_16 (const unsigned char *buf)
191
{
192
  return ((unsigned short) buf[1] << 8) | (unsigned short) buf[0];
193
}
194
 
195
/* Fetch a big-endian 32-bit value.  */
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197
static inline unsigned int
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simple_object_fetch_big_32 (const unsigned char *buf)
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{
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  return (((unsigned int) buf[0] << 24)
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          | ((unsigned int) buf[1] << 16)
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          | ((unsigned int) buf[2] << 8)
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          | (unsigned int) buf[3]);
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}
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/* Fetch a little-endian 32-bit value.  */
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208
static inline unsigned int
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simple_object_fetch_little_32 (const unsigned char *buf)
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{
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  return (((unsigned int) buf[3] << 24)
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          | ((unsigned int) buf[2] << 16)
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          | ((unsigned int) buf[1] << 8)
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          | (unsigned int) buf[0]);
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}
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/* Fetch a big-endian 32-bit value as a ulong_type.  */
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static inline ulong_type
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simple_object_fetch_big_32_ulong (const unsigned char *buf)
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{
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  return (ulong_type) simple_object_fetch_big_32 (buf);
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}
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/* Fetch a little-endian 32-bit value as a ulong_type.  */
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static inline ulong_type
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simple_object_fetch_little_32_ulong (const unsigned char *buf)
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{
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  return (ulong_type) simple_object_fetch_little_32 (buf);
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}
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#ifdef UNSIGNED_64BIT_TYPE
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/* Fetch a big-endian 64-bit value.  */
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static inline ulong_type
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simple_object_fetch_big_64 (const unsigned char *buf)
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{
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  return (((ulong_type) buf[0] << 56)
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          | ((ulong_type) buf[1] << 48)
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          | ((ulong_type) buf[2] << 40)
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          | ((ulong_type) buf[3] << 32)
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          | ((ulong_type) buf[4] << 24)
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          | ((ulong_type) buf[5] << 16)
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          | ((ulong_type) buf[6] << 8)
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          | (ulong_type) buf[7]);
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}
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/* Fetch a little-endian 64-bit value.  */
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252
static inline ulong_type
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simple_object_fetch_little_64 (const unsigned char *buf)
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{
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  return (((ulong_type) buf[7] << 56)
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          | ((ulong_type) buf[6] << 48)
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          | ((ulong_type) buf[5] << 40)
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          | ((ulong_type) buf[4] << 32)
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          | ((ulong_type) buf[3] << 24)
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          | ((ulong_type) buf[2] << 16)
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          | ((ulong_type) buf[1] << 8)
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          | (ulong_type) buf[0]);
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}
264
 
265
#endif
266
 
267
/* Store a big-endian 16-bit value.  */
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269
static inline void
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simple_object_set_big_16 (unsigned char *buf, unsigned short val)
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{
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  buf[0] = (val >> 8) & 0xff;
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  buf[1] = val & 0xff;
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}
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276
/* Store a little-endian 16-bit value.  */
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278
static inline void
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simple_object_set_little_16 (unsigned char *buf, unsigned short val)
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{
281
  buf[1] = (val >> 8) & 0xff;
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  buf[0] = val & 0xff;
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}
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285
/* Store a big-endian 32-bit value.  */
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287
static inline void
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simple_object_set_big_32 (unsigned char *buf, unsigned int val)
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{
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  buf[0] = (val >> 24) & 0xff;
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  buf[1] = (val >> 16) & 0xff;
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  buf[2] = (val >> 8) & 0xff;
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  buf[3] = val & 0xff;
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}
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/* Store a little-endian 32-bit value.  */
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298
static inline void
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simple_object_set_little_32 (unsigned char *buf, unsigned int val)
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{
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  buf[3] = (val >> 24) & 0xff;
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  buf[2] = (val >> 16) & 0xff;
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  buf[1] = (val >> 8) & 0xff;
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  buf[0] = val & 0xff;
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}
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307
/* Store a big-endian 32-bit value coming in as a ulong_type.  */
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309
static inline void
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simple_object_set_big_32_ulong (unsigned char *buf, ulong_type val)
311
{
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  simple_object_set_big_32 (buf, val);
313
}
314
 
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/* Store a little-endian 32-bit value coming in as a ulong_type.  */
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static inline void
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simple_object_set_little_32_ulong (unsigned char *buf, ulong_type val)
319
{
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  simple_object_set_little_32 (buf, val);
321
}
322
 
323
#ifdef UNSIGNED_64BIT_TYPE
324
 
325
/* Store a big-endian 64-bit value.  */
326
 
327
static inline void
328
simple_object_set_big_64 (unsigned char *buf, ulong_type val)
329
{
330
  buf[0] = (val >> 56) & 0xff;
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  buf[1] = (val >> 48) & 0xff;
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  buf[2] = (val >> 40) & 0xff;
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  buf[3] = (val >> 32) & 0xff;
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  buf[4] = (val >> 24) & 0xff;
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  buf[5] = (val >> 16) & 0xff;
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  buf[6] = (val >> 8) & 0xff;
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  buf[7] = val & 0xff;
338
}
339
 
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/* Store a little-endian 64-bit value.  */
341
 
342
static inline void
343
simple_object_set_little_64 (unsigned char *buf, ulong_type val)
344
{
345
  buf[7] = (val >> 56) & 0xff;
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  buf[6] = (val >> 48) & 0xff;
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  buf[5] = (val >> 40) & 0xff;
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  buf[4] = (val >> 32) & 0xff;
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  buf[3] = (val >> 24) & 0xff;
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  buf[2] = (val >> 16) & 0xff;
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  buf[1] = (val >> 8) & 0xff;
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  buf[0] = val & 0xff;
353
}
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#endif

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