/* * Architecture specific code used by dl-startup.c * Copyright (C) 2000-2004 by Erik Andersen */ __asm__ ( " .text\n" " .globl _start\n" " .type _start,@function\n" " .hidden _start\n" "_start:\n" " call _dl_start\n" " # Save the user entry point address in %edi.\n" " movl %eax, %edi\n" " # Point %ebx at the GOT.\n" " call 1f\n" "1: popl %ebx\n" " addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx\n" " # See if we were run as a command with the executable file\n" " # name as an extra leading argument.\n" " movl _dl_skip_args@GOTOFF(%ebx), %eax\n" " # Pop the original argument count.\n" " popl %edx\n" " # Adjust the stack pointer to skip _dl_skip_args words.\n" " leal (%esp,%eax,4), %esp\n" " # Subtract _dl_skip_args from argc.\n" " subl %eax, %edx\n" " # Push argc back on the stack.\n" " push %edx\n" " # Pass our FINI ptr() to the user in %edx, as per ELF ABI.\n" " leal _dl_fini@GOTOFF(%ebx), %edx\n" " # Jump to the user's entry point.\n" " jmp *%edi\n" " .size _start,.-_start\n" " .previous\n" ); /* Get a pointer to the argv array. On many platforms this can be just * the address of the first argument, on other platforms we need to * do something a little more subtle here. */ #define GET_ARGV(ARGVP, ARGS) ARGVP = (((unsigned long*) & ARGS)+1) /* Handle relocation of the symbols in the dynamic loader. */ static __always_inline void PERFORM_BOOTSTRAP_RELOC(ELF_RELOC *rpnt, unsigned long *reloc_addr, unsigned long symbol_addr, unsigned long load_addr, attribute_unused Elf32_Sym *symtab) { switch (ELF_R_TYPE(rpnt->r_info)) { case R_386_32: *reloc_addr += symbol_addr; break; case R_386_PC32: *reloc_addr += symbol_addr - (unsigned long) reloc_addr; break; case R_386_GLOB_DAT: case R_386_JMP_SLOT: *reloc_addr = symbol_addr; break; case R_386_RELATIVE: *reloc_addr += load_addr; break; default: _dl_exit(1); } }