dl-startup.h

Axis 221 camera embedded programing interface

/*
 * Architecture specific code used by dl-startup.c
 */

/* For m68k we do not need any special setup so go right to _dl_boot() */
#define DL_BOOT(X) __attribute_used__ void _dl_boot (X)

/* Get a pointer to the argv array.  On many platforms this can be just
 * the address if the first argument, on other platforms we need to
 * do something a little more subtle here.  */
#define GET_ARGV(ARGVP, ARGS) ((ARGVP) = ((unsigned int *) &(ARGS)))


/* Handle relocation of the symbols in the dynamic loader. */
static inline
void PERFORM_BOOTSTRAP_RELOC(ELF_RELOC *rpnt, unsigned long *reloc_addr,
	unsigned long symbol_addr, unsigned long load_addr, Elf32_Sym *symtab)
{
    switch (ELF32_R_TYPE(rpnt->r_info))
    {
	case R_68K_8:
	    *(char *) reloc_addr = symbol_addr + rpnt->r_addend;
	    break;
	case R_68K_16:
	    *(short *) reloc_addr = symbol_addr + rpnt->r_addend;
	    break;
	case R_68K_32:
	    *reloc_addr = symbol_addr + rpnt->r_addend;
	    break;
	case R_68K_PC8:
	    *(char *) reloc_addr = (symbol_addr + rpnt->r_addend
		    - (unsigned int) reloc_addr);
	    break;
	case R_68K_PC16:
	    *(short *) reloc_addr = (symbol_addr + rpnt->r_addend
		    - (unsigned int) reloc_addr);
	    break;
	case R_68K_PC32:
	    *reloc_addr = (symbol_addr + rpnt->r_addend
		    - (unsigned int) reloc_addr);
	    break;
	case R_68K_GLOB_DAT:
	case R_68K_JMP_SLOT:
	    *reloc_addr = symbol_addr;
	    break;
	case R_68K_RELATIVE:
	    *reloc_addr = ((unsigned int) load_addr +
		    (rpnt->r_addend ? : : *reloc_addr));
	    break;
	default:
	    _dl_exit (1);
    }
}


/* Transfer control to the user's application, once the dynamic loader is
 * done.  This routine has to exit the current function, then call the
 * _dl_elf_main function.  */
#define START()					\
  __asm__ volatile ("unlk %%a6\n\t"		\
		    "jmp %0@"			\
		    : : "a" (_dl_elf_main));