/* * Various assmbly language/system dependent hacks that are required * so that we can minimize the amount of platform specific code. */ /* * Define this if the system uses RELOCA. */ #undef ELF_USES_RELOCA /* * 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) /* * Get the address of the Global offset table. This must be absolute, not * relative. */ #define GET_GOT(X) __asm__("\tmovl %%ebx,%0\n\t" : "=a" (X)) /* * Initialization sequence for a GOT. */ #define INIT_GOT(GOT_BASE,MODULE) \ { \ GOT_BASE[2] = (int) _dl_linux_resolve; \ GOT_BASE[1] = (int) MODULE; \ } /* * Here is a macro to perform a relocation. This is only used when * bootstrapping the dynamic loader. RELP is the relocation that we * are performing, REL is the pointer to the address we are relocating. * SYMBOL is the symbol involved in the relocation, and LOAD is the * load address. */ #define PERFORM_BOOTSTRAP_RELOC(RELP,REL,SYMBOL,LOAD) \ switch(ELF32_R_TYPE((RELP)->r_info)){ \ case R_386_32: \ *REL += SYMBOL; \ break; \ case R_386_PC32: \ *REL += SYMBOL - (unsigned int) REL; \ break; \ case R_386_GLOB_DAT: \ case R_386_JMP_SLOT: \ *REL = SYMBOL; \ break; \ case R_386_RELATIVE: \ *REL += (unsigned int) LOAD; \ break; \ default: \ _dl_exit(1); \ } /* * Transfer control to the user's application, once the dynamic loader * is done. */ #define START() \ __asm__ volatile ("leave\n\t" \ "jmp *%%eax\n\t" \ : "=a" (status) : \ "d" (_dl_interpreter_exit), "a" (_dl_elf_main)) /* Here we define the magic numbers that this dynamic loader should accept */ #define MAGIC1 EM_386 #define MAGIC2 EM_486 /* Used for error messages */ #define ELF_TARGET "386/486" extern unsigned int _dl_linux_resolver(int dummy, int i); #define do_rem(result, n, base) result = (n % base)