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#include <sys/cdefs.h>
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <rtl.h>
#include "rtl-elf.h"
#include "rtl-error.h"
#include <rtl-trace.h>
static inline Elf_Addr
load_ptr(void *where)
{
Elf_Addr res;
memcpy(&res, where, sizeof(res));
return (res);
}
static inline void
store_ptr(void *where, Elf_Addr val)
{
memcpy(where, &val, sizeof(val));
}
bool
rtems_rtl_elf_rel_resolve_sym (Elf_Word type)
{
return true;
}
bool
rtems_rtl_elf_relocate_rela (const rtems_rtl_obj_t* obj,
const Elf_Rela* rela,
const rtems_rtl_obj_sect_t* sect,
const char* symname,
const Elf_Byte syminfo,
const Elf_Word symvalue)
{
Elf_Addr *where;
Elf_Word tmp;
where = (Elf_Addr *)(sect->base + rela->r_offset);
if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) {
printf("relocated address 0x%08lx\n", (Elf_Addr)where);
}
switch (ELF_R_TYPE(rela->r_info)) {
case R_TYPE(NONE):
break;
case R_TYPE(16_RELA):
/*
* half16: S + A
*/
*(uint16_t *)where = (symvalue + rela->r_addend) & 0xffff;
break;
case R_TYPE(24_RELA):
/*
* imm24: (S + A) & 0xFFFFFF
*/
tmp = symvalue + rela->r_addend;
if (((Elf_Sword)tmp > 0x7fffff) || ((Elf_Sword)tmp < -0x800000)) {
printf("24_RELA Overflow\n");
return false;
}
*where = (*where & 0xff000000) | tmp & 0xffffff;
break;
case R_TYPE(32_RELA):
/*
* word32: S + A
*/
*where += symvalue + rela->r_addend;
break;
case R_TYPE(26_PCREL_RELA):
/*
* disp24: ((S + A - P) >> 2) & 0xFFFFFF
*/
tmp = symvalue + rela->r_addend - (Elf_Addr)where;
tmp = (Elf_Sword)tmp >> 2;
if (((Elf_Sword)tmp > 0x7fffff) || ((Elf_Sword)tmp < -0x800000)) {
printf("26_PCREL_RELA Overflow\n");
return false;
}
*where = (*where & 0xff000000) | (tmp & 0xffffff);
break;
case R_TYPE(18_PCREL_RELA):
/*
* disp16: ((S + A - P) >> 2) & 0xFFFFFF
*/
tmp = symvalue + rela->r_addend - (Elf_Addr)where;
tmp = (Elf_Sword)tmp >> 2;
if (((Elf_Sword)tmp > 0x7fff) || ((Elf_Sword)tmp < -0x8000)) {
printf("18_PCREL_RELA Overflow\n");
return false;
}
*where = (*where & 0xffff0000) | (tmp & 0xffff);
break;
case R_TYPE(HI16_ULO_RELA):
/*
* imm16: ((S + A) >> 16)
*/
tmp = *where;
tmp += ((symvalue + rela->r_addend) >> 16) & 0xffff;
*where = tmp;
break;
case R_TYPE(HI16_SLO_RELA):
/*
* imm16: ((S + A) >> 16) or ((S + A + 0x10000) >> 16)
*/
tmp = symvalue + rela->r_addend;
if (tmp & 0x8000) tmp += 0x10000;
tmp = (tmp >> 16) & 0xffff;
*where += tmp;
break;
case R_TYPE(LO16_RELA):
/*
* imm16: (S + A) & 0xFFFF
*/
tmp = symvalue + rela->r_addend;
*where = (*where & 0xffff0000) | (tmp & 0xffff);
break;
default:
rtems_rtl_set_error (EINVAL, "rela type record not supported");
printf("Unsupported rela reloc types\n");
return false;
}
return true;
}
bool
rtems_rtl_elf_relocate_rel (const rtems_rtl_obj_t* obj,
const Elf_Rel* rel,
const rtems_rtl_obj_sect_t* sect,
const char* symname,
const Elf_Byte syminfo,
const Elf_Word symvalue)
{
rtems_rtl_set_error (EINVAL, "rel type record not supported");
return true;
}
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