forked from Imagelibrary/rtems
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
#include <sys/cdefs.h>
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#include <errno.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <rtems/rtl/rtl.h>
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#include "rtl-elf.h"
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#include "rtl-error.h"
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#include "rtl-trace.h"
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bool
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rtems_rtl_elf_rel_resolve_sym (Elf_Word type)
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{
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return true;
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}
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bool
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rtems_rtl_elf_relocate_rela (const rtems_rtl_obj_t* obj,
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const Elf_Rela* rela,
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const rtems_rtl_obj_sect_t* sect,
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const char* symname,
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const Elf_Byte syminfo,
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const Elf_Word symvalue)
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{
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Elf_Addr *where;
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Elf_Word tmp;
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where = (Elf_Addr *)(sect->base + rela->r_offset);
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if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) {
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printf("rela relocation type is %ld\n", ELF_R_TYPE(rela->r_info));
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printf("relocated address 0x%08lx\n", (Elf_Addr)where);
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}
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tmp = symvalue;
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switch (ELF_R_TYPE(rela->r_info)) {
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case R_TYPE(NONE):
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break;
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case R_TYPE(DIR16):
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*(uint16_t *)where += symvalue + rela->r_addend;
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break;
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case R_TYPE(DIR32):
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case R_TYPE(DIR32A16):
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*where += symvalue + rela->r_addend;
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break;
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case R_TYPE(DIR24A8):
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if (ELF32_R_SYM(rela->r_info))
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*where += symvalue + rela->r_addend;
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break;
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case R_TYPE(DIR24R8):
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where = (uint32_t *)((uint32_t)where - 1);
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*where = (*where & 0xff000000) | ((*where & 0xffffff) + symvalue + rela->r_addend);
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break;
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case R_TYPE(PCREL8):
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/* bcc instruction */
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tmp = symvalue + rela->r_addend - (Elf_Addr)where - 1;
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if (((Elf32_Sword)tmp > 0x7f) || ((Elf32_Sword)tmp < -(Elf32_Sword)0x80)){
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printf("PCREL8 overflow\n");
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return false;
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} else {
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*(uint8_t *)where = tmp;
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}
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break;
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case R_TYPE(PCREL16):
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/* bcc instruction */
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tmp = symvalue + rela->r_addend - (Elf_Addr)where - 2;
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if (((Elf32_Sword)tmp > 0x7fff) || ((Elf32_Sword)tmp < -(Elf32_Sword)0x8000)){
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printf("PCREL16 overflow\n");
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return false;
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} else {
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*(uint16_t *)where = tmp;
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}
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break;
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default:
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rtems_rtl_set_error (EINVAL, "rela type record not supported");
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printf("Unsupported reloc types\n");
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return false;
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}
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return true;
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}
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bool
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rtems_rtl_elf_relocate_rel (const rtems_rtl_obj_t* obj,
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const Elf_Rel* rel,
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const rtems_rtl_obj_sect_t* sect,
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const char* symname,
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const Elf_Byte syminfo,
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const Elf_Word symvalue)
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{
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rtems_rtl_set_error (EINVAL, "rel type record not supported");
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return false;
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}
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