ldso/ldso/cris/dl-startup.h

   1 /*
   2  * Architecture specific code used by dl-startup.c
   3  */
   4
   5 /* This code fixes the stack pointer so that the dynamic linker
   6  * can find argc, argv and auxvt (Auxillary Vector Table).  */
   7 #ifdef __arch_v32
   8
   9 __asm__(""                                      \
  10 "       .text\n"                        \
  11 "       .globl _start\n"                \
  12 "       .type _start,@function\n"       \
  13 "_start:\n"                             \
  14 "       move.d  $sp,$r10\n"             \
  15 "       lapc    _dl_start,$r9\n"        \
  16 "       jsr     $r9\n"                  \
  17 "       nop\n"                          \
  18 "       moveq   0,$r8\n"                \
  19 "       jump    $r10\n"                 \
  20 "       move    $r8,$srp\n"             \
  21 "       .size _start,.-_start\n"        \
  22 "       .previous\n"                    \
  23 );
  24
  25 #else
  26
  27 __asm__(""                                      \
  28 "       .text\n"                        \
  29 "       .globl _start\n"                \
  30 "       .type _start,@function\n"       \
  31 "_start:\n"                             \
  32 "       move.d  $sp,$r10\n"             \
  33 "       move.d  $pc,$r9\n"              \
  34 "       add.d   _dl_start - ., $r9\n"   \
  35 "       jsr     $r9\n"                  \
  36 "       moveq   0,$r8\n"                \
  37 "       move    $r8,$srp\n"             \
  38 "       jump    $r10\n"                 \
  39 "       .size _start,.-_start\n"        \
  40 "       .previous\n"                    \
  41 );
  42
  43 #endif /* __arch_v32 */
  44
  45 /* Get a pointer to the argv array.  On many platforms this can be just
  46  * the address if the first argument, on other platforms we need to
  47  * do something a little more subtle here.  */
  48 #define GET_ARGV(ARGVP, ARGS) ARGVP = (((unsigned long *) ARGS)+1)
  49
  50
  51 /* We can't call functions earlier in the dl startup process */
  52 #define NO_FUNCS_BEFORE_BOOTSTRAP
  53
  54
  55 /* Handle relocation of the symbols in the dynamic loader. */
  56 static inline
  57 void PERFORM_BOOTSTRAP_RELOC(ELF_RELOC *rpnt, unsigned long *reloc_addr,
  58         unsigned long symbol_addr, unsigned long load_addr, Elf32_Sym *symtab)
  59 {
  60         switch (ELF32_R_TYPE(rpnt->r_info)) {
  61                 case R_CRIS_GLOB_DAT:
  62                 case R_CRIS_JUMP_SLOT:
  63                 case R_CRIS_32:
  64                         *reloc_addr = symbol_addr;
  65                         break;
  66                 case R_CRIS_16_PCREL:
  67                         *(short *) *reloc_addr = symbol_addr + rpnt->r_addend - *reloc_addr - 2;
  68                         break;
  69                 case R_CRIS_32_PCREL:
  70                         *reloc_addr = symbol_addr + rpnt->r_addend - *reloc_addr - 4;
  71                         break;
  72                 case R_CRIS_NONE:
  73                         break;
  74                 case R_CRIS_RELATIVE:
  75                         *reloc_addr = load_addr + rpnt->r_addend;
  76                         break;
  77                 default:
  78                         _dl_exit(1);
  79                         break;
  80         }
  81 }