scoutos / prex-0.9.0 / usr / arch / ppc / elf_reloc.c @ 03e9c04a
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/*-
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* Copyright (c) 2006, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/elf.h> |
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#include <sys/syslog.h> |
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int
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relocate_rel(Elf32_Rel *rel, Elf32_Addr sym_val, char *target_sect)
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{
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/* printf("Invalid relocation type\n"); */
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return -1; |
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} |
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int
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relocate_rela(Elf32_Rela *rela, Elf32_Addr sym_val, char *target_sect)
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{
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Elf32_Addr *where; |
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uint32_t val; |
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where = (Elf32_Addr *)(target_sect + rela->r_offset); |
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val = sym_val + rela->r_addend; |
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switch (ELF32_R_TYPE(rela->r_info)) {
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case R_PPC_NONE:
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break;
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case R_PPC_ADDR32:
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/* printf("R_PPC_ADDR32\n"); */
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*(uint32_t *)where = val; |
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break;
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case R_PPC_ADDR16_LO:
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/* printf("R_PPC_ADDR16_LO\n"); */
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*(uint16_t *)where = val; |
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break;
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case R_PPC_ADDR16_HI:
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/* printf("R_PPC_ADDR16_HI\n"); */
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*(uint16_t *)where = (val >> 16);
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break;
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case R_PPC_ADDR16_HA:
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/* printf("R_PPC_ADDR16_HA\n"); */
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*(uint16_t *)where = (val + 0x8000) >> 16; |
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break;
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case R_PPC_REL24:
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/* printf("R_PPC_REL24\n"); */
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*(uint32_t *)where = |
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(*(uint32_t *)where & ~0x03fffffc)
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| ((val - (uint32_t)where) |
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& 0x03fffffc);
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break;
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case R_PPC_REL32:
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/* printf("R_PPC_REL32\n"); */
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*(uint32_t *)where = val - (uint32_t)where; |
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break;
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default:
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/* printf("Unkown relocation type=%d\n",
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ELF32_R_TYPE(rela->r_info)); */
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#ifdef DEBUG
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syslog(LOG_ERR, "relocation fail type=%d\n", ELF32_R_TYPE(rela->r_info));
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#endif
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return -1; |
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} |
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return 0; |
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} |