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Annotation of prex-old/usr/arch/arm/elf_reloc.c, Revision 1.1.1.1

1.1       nbrk        1: /*-
                      2:  * Copyright (c) 2006, Kohsuke Ohtani
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  * 3. Neither the name of the author nor the names of any co-contributors
                     14:  *    may be used to endorse or promote products derived from this software
                     15:  *    without specific prior written permission.
                     16:  *
                     17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
                     21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     27:  * SUCH DAMAGE.
                     28:  */
                     29: #include <sys/elf.h>
                     30: #include <sys/syslog.h>
                     31:
                     32: int
                     33: relocate_rel(Elf32_Rel *rel, Elf32_Addr sym_val, char *target_sect)
                     34: {
                     35:        Elf32_Addr *where, tmp;
                     36:        Elf32_Sword addend;
                     37:
                     38:        where = (Elf32_Addr *)(target_sect + rel->r_offset);
                     39:
                     40:        switch (ELF32_R_TYPE(rel->r_info)) {
                     41:        case R_ARM_NONE:
                     42:                break;
                     43:        case R_ARM_ABS32:
                     44:                *where += (Elf32_Addr)sym_val;
                     45:                /* dbg("R_ARM_ABS32: %x -> %x\n", where, *where); */
                     46:                break;
                     47:        case R_ARM_PC24:
                     48:        case R_ARM_PLT32:
                     49:        case R_ARM_CALL:
                     50:        case R_ARM_JUMP24:
                     51:                addend = *where & 0x00ffffff;
                     52:                if (addend & 0x00800000)
                     53:                        addend |= 0xff000000;
                     54:                tmp = sym_val - (Elf32_Addr)where + (addend << 2);
                     55:                tmp >>= 2;
                     56:                *where = (*where & 0xff000000) | (tmp & 0x00ffffff);
                     57:                /* dbg("R_ARM_PC24: %x -> %x\n", where, *where); */
                     58:                break;
                     59:        default:
                     60:                syslog(LOG_INFO, "relocation fail type=%d\n", ELF32_R_TYPE(rel->r_info));
                     61:                return -1;
                     62:        }
                     63:        return 0;
                     64: }
                     65:
                     66: int
                     67: relocate_rela(Elf32_Rela *rela, Elf32_Addr sym_val, char *target_sec)
                     68: {
                     69:        /* dbg("Invalid relocation type\n"); */
                     70:        return -1;
                     71: }