diff options
Diffstat (limited to 'ldso/ldso/i386/dl-startup.h')
| -rw-r--r-- | ldso/ldso/i386/dl-startup.h | 54 |
1 files changed, 49 insertions, 5 deletions
diff --git a/ldso/ldso/i386/dl-startup.h b/ldso/ldso/i386/dl-startup.h index 42c96a6f5..d57134d19 100644 --- a/ldso/ldso/i386/dl-startup.h +++ b/ldso/ldso/i386/dl-startup.h @@ -1,7 +1,51 @@ -/* Any assmbly language/system dependent hacks needed to setup boot1.c so it - * will work as expected and cope with whatever platform specific wierdness is - * needed for this architecture. See arm/boot1_arch.h for an example of what - * can be done. +/* vi: set sw=4 ts=4: */ +/* + * Architecture specific code used by dl-startup.c + * Copyright (C) 2000-2004 by Erik Andersen <andersen@codpoet.org> */ -#define DL_BOOT(X) void __attribute__ ((unused)) _dl_boot (X) +/* For x86 we do not need any special setup so go right to _dl_boot() */ +#define DL_BOOT(X) __attribute__ ((unused)) 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 long*) & 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_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); + } +} + + +/* 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 ("leave\n\t" \ + "jmp *%%eax\n\t" \ + : "=a" (status) : "a" (_dl_elf_main)) + + + + |