File: [local] / prex-old / usr / arch / arm / elf_reloc.c (download)
Revision 1.1.1.1 (vendor branch), Tue Jun 3 09:38:46 2008 UTC (16 years, 3 months ago) by nbrk
Branch: MAIN, KOHSUKE
CVS Tags: PREX_0_7_BASE, HEAD Branch point for: PREX_0_8_BASE
Changes since 1.1: +0 -0 lines
Yeah, this is an initial import of Prex, portable real-time microkernel
operating system. I wanna hack it for non-profit but fun, so let it in.
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/*-
* Copyright (c) 2006, Kohsuke Ohtani
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/elf.h>
#include <sys/syslog.h>
int
relocate_rel(Elf32_Rel *rel, Elf32_Addr sym_val, char *target_sect)
{
Elf32_Addr *where, tmp;
Elf32_Sword addend;
where = (Elf32_Addr *)(target_sect + rel->r_offset);
switch (ELF32_R_TYPE(rel->r_info)) {
case R_ARM_NONE:
break;
case R_ARM_ABS32:
*where += (Elf32_Addr)sym_val;
/* dbg("R_ARM_ABS32: %x -> %x\n", where, *where); */
break;
case R_ARM_PC24:
case R_ARM_PLT32:
case R_ARM_CALL:
case R_ARM_JUMP24:
addend = *where & 0x00ffffff;
if (addend & 0x00800000)
addend |= 0xff000000;
tmp = sym_val - (Elf32_Addr)where + (addend << 2);
tmp >>= 2;
*where = (*where & 0xff000000) | (tmp & 0x00ffffff);
/* dbg("R_ARM_PC24: %x -> %x\n", where, *where); */
break;
default:
syslog(LOG_INFO, "relocation fail type=%d\n", ELF32_R_TYPE(rel->r_info));
return -1;
}
return 0;
}
int
relocate_rela(Elf32_Rela *rela, Elf32_Addr sym_val, char *target_sec)
{
/* dbg("Invalid relocation type\n"); */
return -1;
}