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- /*
- * Architecture specific code used by dl-startup.c
- * Copyright (C) 2000-2004 by Erik Andersen <andersen@codepoet.org>
- */
- __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);
- }
- }
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