tccelf.h

   1 /*
   2  *  ELF file handling for TCC
   3  *
   4  *  Copyright (c) 2001-2004 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20 #ifndef __TCCELF_H__
  21 #define __TCCELF_H__
  22
  23 #define ARMAG  "!<arch>\012"    /* For COFF and a.out archives */
  24 #define ELF_PAGE_SIZE  0x1000
  25
  26 typedef struct {
  27     unsigned int n_strx;         /* index into string table of name */
  28     unsigned char n_type;         /* type of symbol */
  29     unsigned char n_other;        /* misc info (usually empty) */
  30     unsigned short n_desc;        /* description field */
  31     unsigned int n_value;        /* value of symbol */
  32 } Stab_Sym;
  33
  34 Section *new_symtab(TCCState *s1,
  35                            const char *symtab_name, int sh_type, int sh_flags,
  36                            const char *strtab_name,
  37                            const char *hash_name, int hash_sh_flags);
  38 /* add tcc runtime libraries */
  39 void tcc_add_runtime(TCCState *s1);
  40 /* relocate symbol table, resolve undefined symbols if do_resolve is
  41    true and output error if undefined symbol. */
  42 void relocate_syms(TCCState *s1, int do_resolve);
  43 /* relocate common symbols in the .bss section */
  44 void relocate_common_syms(void);
  45 /* relocate a given section (CPU dependent) */
  46 void relocate_section(TCCState *s1, Section *s);
  47 /* add various standard linker symbols (must be done after the
  48    sections are filled (for example after allocating common
  49    symbols)) */
  50 void tcc_add_linker_symbols(TCCState *s1);
  51 /* build GOT and PLT entries */
  52 void build_got_entries(TCCState *s1);
  53 /* return elf symbol value or error */
  54 void *tcc_get_symbol_err(TCCState *s, const char *name);
  55 /* load an object file and merge it with current files */
  56 int tcc_load_object_file(TCCState *s1,
  57                          int fd, unsigned long file_offset);
  58 /* load a '.a' file */
  59 int tcc_load_archive(TCCState *s1, int fd);
  60
  61 /* section generation */
  62 void section_realloc(Section *sec, unsigned long new_size);
  63 void *section_ptr_add(Section *sec, unsigned long size);
  64 void put_extern_sym(Sym *sym, Section *section,
  65                            unsigned long value, unsigned long size);
  66 void greloc(Section *s, Sym *sym, unsigned long addr, int type);
  67 int put_elf_str(Section *s, const char *sym);
  68 int put_elf_sym(Section *s,
  69                        unsigned long value, unsigned long size,
  70                        int info, int other, int shndx, const char *name);
  71 int add_elf_sym(Section *s, uplong value, unsigned long size,
  72                        int info, int other, int sh_num, const char *name);
  73 void put_elf_reloc(Section *symtab, Section *s, unsigned long offset,
  74                           int type, int symbol);
  75 void put_stabs(const char *str, int type, int other, int desc,
  76                       unsigned long value);
  77 void put_stabs_r(const char *str, int type, int other, int desc,
  78                         unsigned long value, Section *sec, int sym_index);
  79 void put_stabn(int type, int other, int desc, int value);
  80 void put_stabd(int type, int other, int desc);
  81 void *load_data(int fd, unsigned long file_offset, unsigned long size);
  82
  83 #endif /* __TCCELF_H__ */