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/* m68k specific support for Elf loading and relocation.
Copyright 1996, 1997 Linux International.
Contributed by Richard Henderson <rth@tamu.edu>
This file is part of the Linux modutils.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include <stddef.h>
#include <module.h>
#include <obj.h>
#include <util.h>
/*======================================================================*/
struct obj_file *
arch_new_file (void)
{
return xmalloc(sizeof(struct obj_file));
}
struct obj_section *
arch_new_section (void)
{
return xmalloc(sizeof(struct obj_section));
}
struct obj_symbol *
arch_new_symbol (void)
{
return xmalloc(sizeof(struct obj_symbol));
}
int
arch_load_proc_section(struct obj_section *sec, int fp)
{
/* Assume it's just a debugging section that we can safely
ignore ... */
sec->contents = NULL;
return 0;
}
enum obj_reloc
arch_apply_relocation (struct obj_file *ef,
struct obj_section *targsec,
struct obj_section *symsec,
struct obj_symbol *sym,
Elf32_Rela *rel,
Elf32_Addr v)
{
char *loc = targsec->contents + rel->r_offset;
Elf32_Addr dot = targsec->header.sh_addr + rel->r_offset;
enum obj_reloc ret = obj_reloc_ok;
switch (ELF32_R_TYPE(rel->r_info))
{
case R_68K_NONE:
break;
case R_68K_8:
if (v > 0xff)
ret = obj_reloc_overflow;
*(char *)loc = v;
break;
case R_68K_16:
if (v > 0xffff)
ret = obj_reloc_overflow;
*(short *)loc = v;
break;
case R_68K_32:
*(int *)loc = v;
break;
case R_68K_PC8:
v -= dot;
if ((Elf32_Sword)v > 0x7f || (Elf32_Sword)v < -(Elf32_Sword)0x80)
ret = obj_reloc_overflow;
*(char *)loc = v;
break;
case R_68K_PC16:
v -= dot;
if ((Elf32_Sword)v > 0x7fff || (Elf32_Sword)v < -(Elf32_Sword)0x8000)
ret = obj_reloc_overflow;
*(short *)loc = v;
break;
case R_68K_PC32:
*(int *)loc = v - dot;
break;
case R_68K_RELATIVE:
*(int *)loc += ef->baseaddr;
break;
default:
ret = obj_reloc_unhandled;
break;
}
return ret;
}
int
arch_create_got (struct obj_file *ef)
{
return 1;
}
int
arch_init_module (struct obj_file *f, struct module *mod)
{
return 1;
}
int
arch_finalize_section_address(struct obj_file *f, Elf32_Addr base)
{
int i, n = f->header.e_shnum;
f->baseaddr = base;
for (i = 0; i < n; ++i)
f->sections[i]->header.sh_addr += base;
return 1;
}
int
arch_archdata (struct obj_file *fin, struct obj_section *sec)
{
return 0;
}
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