Home | History | Annotate | Download | only in bfd
      1 /* SPU specific support for 32-bit ELF.
      2 
      3    Copyright (C) 2006-2014 Free Software Foundation, Inc.
      4 
      5    This file is part of BFD, the Binary File Descriptor library.
      6 
      7    This program is free software; you can redistribute it and/or modify
      8    it under the terms of the GNU General Public License as published by
      9    the Free Software Foundation; either version 3 of the License, or
     10    (at your option) any later version.
     11 
     12    This program is distributed in the hope that it will be useful,
     13    but WITHOUT ANY WARRANTY; without even the implied warranty of
     14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     15    GNU General Public License for more details.
     16 
     17    You should have received a copy of the GNU General Public License
     18    along with this program; if not, write to the Free Software Foundation,
     19    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
     20 
     21 struct spu_elf_params
     22 {
     23   /* Stash various callbacks for --auto-overlay.  */
     24   void (*place_spu_section) (asection *, asection *, const char *);
     25   bfd_size_type (*spu_elf_load_ovl_mgr) (void);
     26   FILE *(*spu_elf_open_overlay_script) (void);
     27   void (*spu_elf_relink) (void);
     28 
     29   /* Bit 0 set if --auto-overlay.
     30      Bit 1 set if --auto-relink.
     31      Bit 2 set if --overlay-rodata.  */
     32   unsigned int auto_overlay : 3;
     33 #define AUTO_OVERLAY 1
     34 #define AUTO_RELINK 2
     35 #define OVERLAY_RODATA 4
     36 
     37   /* Type of overlays, enum _ovly_flavour.  */
     38   unsigned int ovly_flavour : 1;
     39   unsigned int compact_stub : 1;
     40 
     41   /* Set if we should emit symbols for stubs.  */
     42   unsigned int emit_stub_syms : 1;
     43 
     44   /* Set if we want stubs on calls out of overlay regions to
     45      non-overlay regions.  */
     46   unsigned int non_overlay_stubs : 1;
     47 
     48   /* Set if lr liveness analysis should be done.  */
     49   unsigned int lrlive_analysis : 1;
     50 
     51   /* Set if stack size analysis should be done.  */
     52   unsigned int stack_analysis : 1;
     53 
     54   /* Set if __stack_* syms will be emitted.  */
     55   unsigned int emit_stack_syms : 1;
     56 
     57   /* Set if non-icache code should be allowed in icache lines.  */
     58   unsigned int non_ia_text : 1;
     59 
     60   /* Set when the .fixup section should be generated. */
     61   unsigned int emit_fixups : 1;
     62 
     63   /* Range of valid addresses for loadable sections.  */
     64   bfd_vma local_store_lo;
     65   bfd_vma local_store_hi;
     66 
     67   /* Control --auto-overlay feature.  */
     68   unsigned int num_lines;
     69   unsigned int line_size;
     70   unsigned int max_branch;
     71   unsigned int auto_overlay_fixed;
     72   unsigned int auto_overlay_reserved;
     73   int extra_stack_space;
     74 };
     75 
     76 /* Extra info kept for SPU sections.  */
     77 
     78 struct spu_elf_stack_info;
     79 
     80 struct _spu_elf_section_data
     81 {
     82   struct bfd_elf_section_data elf;
     83 
     84   union {
     85     /* Info kept for input sections.  */
     86     struct {
     87       /* Stack analysis info kept for this section.  */
     88       struct spu_elf_stack_info *stack_info;
     89     } i;
     90 
     91     /* Info kept for output sections.  */
     92     struct {
     93       /* Non-zero for overlay output sections.  */
     94       unsigned int ovl_index;
     95       unsigned int ovl_buf;
     96     } o;
     97   } u;
     98 };
     99 
    100 #define spu_elf_section_data(sec) \
    101   ((struct _spu_elf_section_data *) elf_section_data (sec))
    102 
    103 enum _ovly_flavour
    104 {
    105   ovly_normal,
    106   ovly_soft_icache
    107 };
    108 
    109 struct _ovl_stream
    110 {
    111   const void *start;
    112   const void *end;
    113 };
    114 
    115 extern void spu_elf_setup (struct bfd_link_info *, struct spu_elf_params *);
    116 extern void spu_elf_plugin (int);
    117 extern bfd_boolean spu_elf_open_builtin_lib (bfd **,
    118 					     const struct _ovl_stream *);
    119 extern bfd_boolean spu_elf_create_sections (struct bfd_link_info *);
    120 extern bfd_boolean spu_elf_size_sections (bfd *, struct bfd_link_info *);
    121 extern int spu_elf_find_overlays (struct bfd_link_info *);
    122 extern int spu_elf_size_stubs (struct bfd_link_info *);
    123 extern void spu_elf_place_overlay_data (struct bfd_link_info *);
    124 extern asection *spu_elf_check_vma (struct bfd_link_info *);
    125