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/* vi: set sw=4 ts=4: */
/*
* 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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