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