src/internal/dynlink.h

   1 #ifndef _INTERNAL_RELOC_H
   2 #define _INTERNAL_RELOC_H
   3
   4 #include <features.h>
   5 #include <elf.h>
   6 #include <stdint.h>
   7 #include <stddef.h>
   8 #include <stdarg.h>
   9
  10 #if UINTPTR_MAX == 0xffffffff
  11 typedef Elf32_Ehdr Ehdr;
  12 typedef Elf32_Phdr Phdr;
  13 typedef Elf32_Sym Sym;
  14 #define R_TYPE(x) ((x)&255)
  15 #define R_SYM(x) ((x)>>8)
  16 #define R_INFO ELF32_R_INFO
  17 #else
  18 typedef Elf64_Ehdr Ehdr;
  19 typedef Elf64_Phdr Phdr;
  20 typedef Elf64_Sym Sym;
  21 #define R_TYPE(x) ((x)&0x7fffffff)
  22 #define R_SYM(x) ((x)>>32)
  23 #define R_INFO ELF64_R_INFO
  24 #endif
  25
  26 /* These enum constants provide unmatchable default values for
  27  * any relocation type the arch does not use. */
  28 enum {
  29         REL_NONE = 0,
  30         REL_SYMBOLIC = -100,
  31         REL_USYMBOLIC,
  32         REL_GOT,
  33         REL_PLT,
  34         REL_RELATIVE,
  35         REL_OFFSET,
  36         REL_OFFSET32,
  37         REL_COPY,
  38         REL_SYM_OR_REL,
  39         REL_DTPMOD,
  40         REL_DTPOFF,
  41         REL_TPOFF,
  42         REL_TPOFF_NEG,
  43         REL_TLSDESC,
  44         REL_FUNCDESC,
  45         REL_FUNCDESC_VAL,
  46 };
  47
  48 struct fdpic_loadseg {
  49         uintptr_t addr, p_vaddr, p_memsz;
  50 };
  51
  52 struct fdpic_loadmap {
  53         unsigned short version, nsegs;
  54         struct fdpic_loadseg segs[];
  55 };
  56
  57 struct fdpic_dummy_loadmap {
  58         unsigned short version, nsegs;
  59         struct fdpic_loadseg segs[1];
  60 };
  61
  62 #include "reloc.h"
  63
  64 #ifndef FDPIC_CONSTDISP_FLAG
  65 #define FDPIC_CONSTDISP_FLAG 0
  66 #endif
  67
  68 #ifndef DL_FDPIC
  69 #define DL_FDPIC 0
  70 #endif
  71
  72 #ifndef DL_NOMMU_SUPPORT
  73 #define DL_NOMMU_SUPPORT 0
  74 #endif
  75
  76 #ifndef TLSDESC_BACKWARDS
  77 #define TLSDESC_BACKWARDS 0
  78 #endif
  79
  80 #if !DL_FDPIC
  81 #define IS_RELATIVE(x,s) ( \
  82         (R_TYPE(x) == REL_RELATIVE) || \
  83         (R_TYPE(x) == REL_SYM_OR_REL && !R_SYM(x)) )
  84 #else
  85 #define IS_RELATIVE(x,s) ( ( \
  86         (R_TYPE(x) == REL_FUNCDESC_VAL) || \
  87         (R_TYPE(x) == REL_SYMBOLIC) ) \
  88         && (((s)[R_SYM(x)].st_info & 0xf) == STT_SECTION) )
  89 #endif
  90
  91 #ifndef NEED_MIPS_GOT_RELOCS
  92 #define NEED_MIPS_GOT_RELOCS 0
  93 #endif
  94
  95 #ifndef DT_DEBUG_INDIRECT
  96 #define DT_DEBUG_INDIRECT 0
  97 #endif
  98
  99 #ifndef DT_DEBUG_INDIRECT_REL
 100 #define DT_DEBUG_INDIRECT_REL 0
 101 #endif
 102
 103 #define AUX_CNT 32
 104 #define DYN_CNT 37
 105
 106 typedef void (*stage2_func)(unsigned char *, size_t *);
 107
 108 hidden void *__dlsym(void *restrict, const char *restrict, void *restrict);
 109
 110 hidden void __dl_seterr(const char *, ...);
 111 hidden int __dl_invalid_handle(void *);
 112 hidden void __dl_vseterr(const char *, va_list);
 113
 114 hidden ptrdiff_t __tlsdesc_static(), __tlsdesc_dynamic();
 115
 116 hidden extern int __malloc_replaced;
 117 hidden extern int __aligned_alloc_replaced;
 118 hidden void __malloc_donate(char *, char *);
 119 hidden int __malloc_allzerop(void *);
 120
 121 #endif