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#include <sys/cdefs.h>
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <rtems/rtl/rtl.h>
#include "rtl-elf.h"
#include "rtl-error.h"
#include "rtl-trace.h"
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_Sword tmp;
where = (Elf_Addr *)(sect->base + rela->r_offset);
/* Handle the not 4byte aligned address carefully */
switch (ELF_R_TYPE(rela->r_info)) {
case R_TYPE(NONE):
break;
case R_TYPE(32):
*(uint16_t *)where = ((symvalue + rela->r_addend) >> 16) & 0xffff;
*((uint16_t *)where + 1) = (symvalue + rela->r_addend) & 0xffff;
if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) {
printf("*where 0x%04x%04x\n", *((uint16_t *)where + 1), *(uint16_t *)where);
}
break;
case R_TYPE(PCREL10):
/* beq, bge, bgeu, bgt, bgtu, ble, bleu, blt, bltu, bne */
if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) {
printf("*where %x\n", *(uint16_t *)where);
printf("symvalue - where %x\n", (int)(symvalue - (Elf_Word)where));
}
tmp = (symvalue + rela->r_addend - ((Elf_Word)where + 2)); /* pc is the next instruction */
tmp = (Elf_Sword)tmp >> 1;
if (((Elf32_Sword)tmp > 0x1ff) || ((Elf32_Sword)tmp < -(Elf32_Sword)0x200)){
printf("Overflow for PCREL10: %d exceed -0x200:0x1ff\n", tmp);
return false;
}
*(uint16_t *)where = (*(uint16_t *)where & 0xfc00) | (tmp & 0x3ff);
if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) {
printf("*where 0x%04x\n", *(uint16_t *)where);
}
break;
default:
rtems_rtl_set_error (EINVAL, "rela type record not supported");
printf("Unsupported 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 false;
}
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