prx.h

   1 #ifndef __PRX_H
   2 #define __PRX_H
   3
   4 #include "types.h"
   5 #include "hash.h"
   6 #include "nids.h"
   7
   8 #define ELF_HEADER_IDENT        16
   9 #define ELF_PRX_TYPE            0xFFA0
  10 #define ELF_MACHINE_MIPS        8
  11 #define ELF_VERSION_CURRENT     1
  12 #define ELF_FLAGS_MACH_ALLEGREX 0x00A20000
  13 #define ELF_FLAGS_ABI_EABI32    0x00003000
  14 #define ELF_FLAGS_MIPS_ARCH2    0x10000000
  15
  16
  17 /* Structure to hold prx header data */
  18 struct prx
  19 {
  20   uint8  ident[ELF_HEADER_IDENT];
  21   uint16 type;
  22   uint16 machine;
  23   uint32 version;
  24   uint32 entry;
  25   uint32 phoff;
  26   uint32 shoff;
  27   uint32 flags;
  28   uint16 ehsize;
  29   uint16 phentsize;
  30   uint16 phnum;
  31   uint16 shentsize;
  32   uint16 shnum;
  33   uint16 shstrndx;
  34
  35   uint32 size;
  36   const uint8 *data;
  37
  38   struct elf_section *sections;
  39   struct hashtable *secbyname;
  40
  41   struct elf_program *programs;
  42
  43   uint32 relocnum;
  44   struct prx_reloc *relocs;
  45
  46   struct prx_modinfo *modinfo;
  47 };
  48
  49 #define SHT_NULL            0
  50 #define SHT_PROGBITS        1
  51 #define SHT_STRTAB          3
  52 #define SHT_NOBITS          8
  53 #define SHT_LOPROC 0x70000000
  54 #define SHT_HIPROC 0x7fffffff
  55 #define SHT_LOUSER 0x80000000
  56 #define SHT_HIUSER 0xffffffff
  57
  58 #define SHT_PRXRELOC (SHT_LOPROC | 0xA0)
  59
  60 #define SHF_WRITE               1
  61 #define SHF_ALLOC               2
  62 #define SHF_EXECINSTR           4
  63
  64 /* Structure defining a single elf section */
  65 struct elf_section
  66 {
  67   uint32 idxname;
  68   uint32 type;
  69   uint32 flags;
  70   uint32 addr;
  71   uint32 offset;
  72   uint32 size;
  73   uint32 link;
  74   uint32 info;
  75   uint32 addralign;
  76   uint32 entsize;
  77
  78   const uint8 *data;
  79   const char *name;
  80
  81 };
  82
  83 #define PT_NULL                 0
  84 #define PT_LOAD                 1
  85 #define PT_LOPROC               0x70000000
  86 #define PT_HIPROC               0x7fffffff
  87 #define PT_PRX                  (PT_LOPROC | 0xA1)
  88
  89 #define PF_X                    1
  90 #define PF_W                    2
  91 #define PF_R                    4
  92
  93 struct elf_program
  94 {
  95   uint32 type;
  96   uint32 offset;
  97   uint32 vaddr;
  98   uint32 paddr;
  99   uint32 filesz;
 100   uint32 memsz;
 101   uint32 flags;
 102   uint32 align;
 103
 104   const uint8 *data;
 105 };
 106
 107
 108 /* MIPS Reloc Entry Types */
 109 #define R_MIPS_NONE     0
 110 #define R_MIPS_16       1
 111 #define R_MIPS_32       2
 112 #define R_MIPS_REL32    3
 113 #define R_MIPS_26       4
 114 #define R_MIPS_HI16     5
 115 #define R_MIPS_LO16     6
 116 #define R_MIPS_GPREL16  7
 117 #define R_MIPS_LITERAL  8
 118 #define R_MIPS_GOT16    9
 119 #define R_MIPS_PC16     10
 120 #define R_MIPS_CALL16   11
 121 #define R_MIPS_GPREL32  12
 122
 123 struct prx_reloc {
 124   uint32 offset;
 125   uint8 type;
 126   uint8 offsbase;
 127   uint8 addrbase;
 128   uint8 extra;
 129   uint32 vaddr;
 130   uint32 target;
 131 };
 132
 133 struct prx_modinfo {
 134
 135   uint16 attributes;
 136   uint16 version;
 137   uint32 gp;
 138   uint32 expvaddr;
 139   uint32 expvaddrbtm;
 140   uint32 impvaddr;
 141   uint32 impvaddrbtm;
 142
 143   uint32 numimports;
 144   uint32 numexports;
 145
 146   struct prx_import *imports;
 147   struct prx_export *exports;
 148
 149   const char *name;
 150 };
 151
 152 struct prx_import {
 153
 154   uint32 namevaddr;
 155   uint32 flags;
 156   uint8  size;
 157   uint8  nvars;
 158   uint16 nfuncs;
 159   uint32 nidsvaddr;
 160   uint32 funcsvaddr;
 161   uint32 varsvaddr;
 162
 163   struct prx_function *funcs;
 164   struct prx_variable *vars;
 165
 166   const char *name;
 167
 168 };
 169
 170 struct prx_export {
 171   uint32 namevaddr;
 172   uint32 flags;
 173   uint8 size;
 174   uint8 nvars;
 175   uint16 nfuncs;
 176   uint32 expvaddr;
 177
 178   struct prx_function *funcs;
 179   struct prx_variable *vars;
 180
 181   const char *name;
 182 };
 183
 184 struct prx_function {
 185   uint32 vaddr;
 186   uint32 nid;
 187   const char *name;
 188 };
 189
 190 struct prx_variable {
 191   uint32 vaddr;
 192   uint32 nid;
 193   const char *name;
 194 };
 195
 196
 197
 198 struct prx *prx_load (const char *path);
 199 void prx_free (struct prx *p);
 200 void prx_print (struct prx *p);
 201 void prx_resolve_nids (struct prx *p, struct nidstable *nids);
 202 uint32 prx_translate (struct prx *p, uint32 vaddr);
 203
 204 #endif /* __PRX_H */