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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"
#include "rtl-unwind.h"
#include "rtl-unwind-dw2.h"
uint32_t
rtems_rtl_elf_section_flags (const rtems_rtl_obj_t* obj,
const Elf_Shdr* shdr)
{
return 0;
}
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("rela relocation type is %ld\n", ELF_R_TYPE(rela->r_info));
printf("relocated address 0x%08lx\n", (Elf_Addr)where);
}
tmp = symvalue;
switch (ELF_R_TYPE(rela->r_info)) {
case R_TYPE(NONE):
break;
case R_TYPE(DIR16):
*(uint16_t *)where += symvalue + rela->r_addend;
break;
case R_TYPE(DIR32):
case R_TYPE(DIR32A16):
*where += symvalue + rela->r_addend;
break;
case R_TYPE(DIR24A8):
if (ELF32_R_SYM(rela->r_info))
*where += symvalue + rela->r_addend;
break;
case R_TYPE(DIR24R8):
where = (uint32_t *)((uint32_t)where - 1);
*where = (*where & 0xff000000) | ((*where & 0xffffff) + symvalue + rela->r_addend);
break;
case R_TYPE(PCREL8):
/* bcc instruction */
tmp = symvalue + rela->r_addend - (Elf_Addr)where - 1;
if (((Elf32_Sword)tmp > 0x7f) || ((Elf32_Sword)tmp < -(Elf32_Sword)0x80)){
printf("PCREL8 overflow\n");
return false;
} else {
*(uint8_t *)where = tmp;
}
break;
case R_TYPE(PCREL16):
/* bcc instruction */
tmp = symvalue + rela->r_addend - (Elf_Addr)where - 2;
if (((Elf32_Sword)tmp > 0x7fff) || ((Elf32_Sword)tmp < -(Elf32_Sword)0x8000)){
printf("PCREL16 overflow\n");
return false;
} else {
*(uint16_t *)where = tmp;
}
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;
}
bool
rtems_rtl_elf_unwind_parse (const rtems_rtl_obj_t* obj,
const char* name,
uint32_t flags)
{
return rtems_rtl_elf_unwind_dw2_parse (obj, name, flags);
}
bool
rtems_rtl_elf_unwind_register (rtems_rtl_obj_t* obj)
{
return rtems_rtl_elf_unwind_dw2_register (obj);
}
bool
rtems_rtl_elf_unwind_deregister (rtems_rtl_obj_t* obj)
{
return rtems_rtl_elf_unwind_dw2_deregister (obj);
}
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