bfd/elf32-spu.h

   1 /* SPU specific support for 32-bit ELF.
   2
   3    Copyright (C) 2006-2023 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
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 struct spu_elf_params
  23 {
  24   /* Stash various callbacks for --auto-overlay.  */
  25   void (*place_spu_section) (asection *, asection *, const char *);
  26   bfd_size_type (*spu_elf_load_ovl_mgr) (void);
  27   FILE *(*spu_elf_open_overlay_script) (void);
  28   void (*spu_elf_relink) (void);
  29
  30   /* Bit 0 set if --auto-overlay.
  31      Bit 1 set if --auto-relink.
  32      Bit 2 set if --overlay-rodata.  */
  33   unsigned int auto_overlay : 3;
  34 #define AUTO_OVERLAY 1
  35 #define AUTO_RELINK 2
  36 #define OVERLAY_RODATA 4
  37
  38   /* Type of overlays, enum _ovly_flavour.  */
  39   unsigned int ovly_flavour : 1;
  40   unsigned int compact_stub : 1;
  41
  42   /* Set if we should emit symbols for stubs.  */
  43   unsigned int emit_stub_syms : 1;
  44
  45   /* Set if we want stubs on calls out of overlay regions to
  46      non-overlay regions.  */
  47   unsigned int non_overlay_stubs : 1;
  48
  49   /* Set if lr liveness analysis should be done.  */
  50   unsigned int lrlive_analysis : 1;
  51
  52   /* Set if stack size analysis should be done.  */
  53   unsigned int stack_analysis : 1;
  54
  55   /* Set if __stack_* syms will be emitted.  */
  56   unsigned int emit_stack_syms : 1;
  57
  58   /* Set if non-icache code should be allowed in icache lines.  */
  59   unsigned int non_ia_text : 1;
  60
  61   /* Set when the .fixup section should be generated. */
  62   unsigned int emit_fixups : 1;
  63
  64   /* Range of valid addresses for loadable sections.  */
  65   bfd_vma local_store_lo;
  66   bfd_vma local_store_hi;
  67
  68   /* Control --auto-overlay feature.  */
  69   unsigned int num_lines;
  70   unsigned int line_size;
  71   unsigned int max_branch;
  72   unsigned int auto_overlay_fixed;
  73   unsigned int auto_overlay_reserved;
  74   int extra_stack_space;
  75 };
  76
  77 /* Extra info kept for SPU sections.  */
  78
  79 struct spu_elf_stack_info;
  80
  81 struct _spu_elf_section_data
  82 {
  83   struct bfd_elf_section_data elf;
  84
  85   union {
  86     /* Info kept for input sections.  */
  87     struct {
  88       /* Stack analysis info kept for this section.  */
  89       struct spu_elf_stack_info *stack_info;
  90     } i;
  91
  92     /* Info kept for output sections.  */
  93     struct {
  94       /* Non-zero for overlay output sections.  */
  95       unsigned int ovl_index;
  96       unsigned int ovl_buf;
  97     } o;
  98   } u;
  99 };
 100
 101 #define spu_elf_section_data(sec) \
 102   ((struct _spu_elf_section_data *) elf_section_data (sec))
 103
 104 enum _ovly_flavour
 105 {
 106   ovly_normal,
 107   ovly_soft_icache
 108 };
 109
 110 struct _ovl_stream
 111 {
 112   const void *start;
 113   const void *end;
 114 };
 115
 116 extern void spu_elf_setup (struct bfd_link_info *, struct spu_elf_params *);
 117 extern void spu_elf_plugin (int);
 118 extern bool spu_elf_open_builtin_lib (bfd **, const struct _ovl_stream *);
 119 extern bool spu_elf_create_sections (struct bfd_link_info *);
 120 extern bool 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 *);