prx.h

   1 #ifndef __PRX_H
   2 #define __PRX_H
   3
   4 #include "types.h"
   5 #include "nids.h"
   6
   7 #define ELF_HEADER_IDENT        16
   8 #define ELF_PRX_TYPE            0xFFA0
   9 #define ELF_MACHINE_MIPS        8
  10 #define ELF_VERSION_CURRENT     1
  11 #define ELF_FLAGS_MACH_ALLEGREX 0x00A20000
  12 #define ELF_FLAGS_ABI_EABI32    0x00003000
  13 #define ELF_FLAGS_MIPS_ARCH2    0x10000000
  14
  15
  16 /* Structure to hold prx header data */
  17 struct prx
  18 {
  19   uint8  ident[ELF_HEADER_IDENT];
  20   uint16 type;
  21   uint16 machine;
  22   uint32 version;
  23   uint32 entry;
  24   uint32 phoff;
  25   uint32 shoff;
  26   uint32 flags;
  27   uint16 ehsize;
  28   uint16 phentsize;
  29   uint16 phnum;
  30   uint16 shentsize;
  31   uint16 shnum;
  32   uint16 shstrndx;
  33
  34   uint32 size;
  35   const uint8 *data;
  36
  37   struct elf_section *sections;
  38
  39   struct elf_program *programs;
  40
  41   uint32 relocnum;
  42   struct prx_reloc *relocs;
  43   struct prx_reloc *relocsbyaddr;
  44
  45   struct prx_modinfo *modinfo;
  46 };
  47
  48 #define SHT_NULL            0
  49 #define SHT_PROGBITS        1
  50 #define SHT_STRTAB          3
  51 #define SHT_NOBITS          8
  52 #define SHT_LOPROC 0x70000000
  53 #define SHT_HIPROC 0x7fffffff
  54 #define SHT_LOUSER 0x80000000
  55 #define SHT_HIUSER 0xffffffff
  56
  57 #define SHT_PRXRELOC (SHT_LOPROC | 0xA0)
  58
  59 #define SHF_WRITE               1
  60 #define SHF_ALLOC               2
  61 #define SHF_EXECINSTR           4
  62
  63 /* Structure defining a single elf section */
  64 struct elf_section
  65 {
  66   uint32 idxname;
  67   uint32 type;
  68   uint32 flags;
  69   uint32 addr;
  70   uint32 offset;
  71   uint32 size;
  72   uint32 link;
  73   uint32 info;
  74   uint32 addralign;
  75   uint32 entsize;
  76
  77   const uint8 *data;
  78   const char *name;
  79
  80 };
  81
  82 #define PT_NULL                 0
  83 #define PT_LOAD                 1
  84 #define PT_LOPROC               0x70000000
  85 #define PT_HIPROC               0x7fffffff
  86 #define PT_PRXRELOC             (PT_LOPROC | 0xA0)
  87 #define PT_PRXRELOC2            (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_26       4
 113 #define R_MIPS_HI16     5
 114 #define R_MIPS_LO16     6
 115 #define R_MIPSX_HI16   13
 116 #define R_MIPSX_J26    14
 117 #define R_MIPSX_JAL26  15
 118
 119
 120 struct prx_reloc {
 121   uint32 offset;
 122   uint8 type;
 123   uint8 offsbase;
 124   uint8 addrbase;
 125   uint8 extra;
 126   uint32 addend;
 127   uint32 vaddr;
 128   uint32 target;
 129 };
 130
 131 struct prx_modinfo {
 132
 133   uint16 attributes;
 134   uint16 version;
 135   uint32 gp;
 136   uint32 expvaddr;
 137   uint32 expvaddrbtm;
 138   uint32 impvaddr;
 139   uint32 impvaddrbtm;
 140
 141   uint32 numimports;
 142   uint32 numexports;
 143
 144   struct prx_import *imports;
 145   struct prx_export *exports;
 146
 147   const char *name;
 148 };
 149
 150 struct prx_import {
 151
 152   uint32 namevaddr;
 153   uint32 flags;
 154   uint8  size;
 155   uint8  nvars;
 156   uint16 nfuncs;
 157   uint32 nidsvaddr;
 158   uint32 funcsvaddr;
 159   uint32 varsvaddr;
 160
 161   struct prx_function *funcs;
 162   struct prx_variable *vars;
 163
 164   const char *name;
 165
 166 };
 167
 168 struct prx_export {
 169   uint32 namevaddr;
 170   uint32 flags;
 171   uint8 size;
 172   uint8 nvars;
 173   uint16 nfuncs;
 174   uint32 expvaddr;
 175
 176   struct prx_function *funcs;
 177   struct prx_variable *vars;
 178
 179   const char *name;
 180 };
 181
 182 struct prx_function {
 183   uint32 vaddr;
 184   uint32 nid;
 185   const char *name;
 186   const char *libname;
 187   void *pfunc;
 188   int numargs;
 189 };
 190
 191 struct prx_variable {
 192   uint32 vaddr;
 193   uint32 nid;
 194   const char *name;
 195   const char *libname;
 196 };
 197
 198 uint32 read_uint32_le (const uint8 *bytes);
 199 uint16 read_uint16_le (const uint8 *bytes);
 200 void write_uint32_le (uint8 *bytes, uint32 val);
 201
 202 struct prx *prx_load (const char *path);
 203 void prx_free (struct prx *p);
 204 void prx_print (struct prx *p, int prtrelocs);
 205
 206 void prx_resolve_nids (struct prx *p, struct nidstable *nids);
 207
 208 uint32 prx_translate (struct prx *p, uint32 vaddr);
 209
 210 int prx_inside_prx (struct prx *p, uint32 offset, uint32 size);
 211 int prx_inside_progfile (struct elf_program *program, uint32 vaddr, uint32 size);
 212 int prx_inside_progmem (struct elf_program *program, uint32 vaddr, uint32 size);
 213 int prx_inside_strprogfile (struct elf_program *program, uint32 vaddr);
 214
 215 uint32 prx_findreloc (struct prx *p, uint32 target);
 216 uint32 prx_findrelocbyaddr (struct prx *p, uint32 vaddr);
 217
 218
 219
 220 #endif /* __PRX_H */