/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup
*
* @brief
*/
/*
* Copyright (C) 2014 Chris Johns <chrisj@rtems.org>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#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 <rtems/rtl/rtl-trace.h>
#include "rtl-unwind.h"
#include "rtl-unwind-dw2.h"
uint32_t
rtems_rtl_elf_section_flags (const rtems_rtl_obj* obj,
const Elf_Shdr* shdr)
{
return 0;
}
uint32_t
rtems_rtl_elf_arch_parse_section (const rtems_rtl_obj* obj,
int section,
const char* name,
const Elf_Shdr* shdr,
const uint32_t flags)
{
(void) obj;
(void) section;
(void) name;
(void) shdr;
return flags;
}
bool
rtems_rtl_elf_arch_section_alloc (const rtems_rtl_obj* obj,
rtems_rtl_obj_sect* sect)
{
(void) obj;
(void) sect;
return false;
}
bool
rtems_rtl_elf_arch_section_free (const rtems_rtl_obj* obj,
rtems_rtl_obj_sect* sect)
{
(void) obj;
(void) sect;
return false;
}
bool
rtems_rtl_elf_rel_resolve_sym (Elf_Word type)
{
return true;
}
uint32_t rtems_rtl_obj_tramp_alignment (const rtems_rtl_obj* obj)
{
(void) obj;
return sizeof(uint32_t);
}
size_t
rtems_rtl_elf_relocate_tramp_max_size (void)
{
/*
* Disable by returning 0.
*/
return 0;
}
rtems_rtl_elf_rel_status
rtems_rtl_elf_relocate_rela_tramp (rtems_rtl_obj* obj,
const Elf_Rela* rela,
const rtems_rtl_obj_sect* sect,
const char* symname,
const Elf_Byte syminfo,
const Elf_Word symvalue)
{
(void) obj;
(void) rela;
(void) sect;
(void) symname;
(void) syminfo;
(void) symvalue;
return rtems_rtl_elf_rel_no_error;
}
rtems_rtl_elf_rel_status
rtems_rtl_elf_relocate_rela (rtems_rtl_obj* obj,
const Elf_Rela* rela,
const rtems_rtl_obj_sect* 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: %ld exceed -0x200:0x1ff\n", tmp);
return rtems_rtl_elf_rel_failure;
}
*(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 rtems_rtl_elf_rel_failure;
}
return rtems_rtl_elf_rel_no_error;
}
rtems_rtl_elf_rel_status
rtems_rtl_elf_relocate_rel_tramp (rtems_rtl_obj* obj,
const Elf_Rel* rel,
const rtems_rtl_obj_sect* sect,
const char* symname,
const Elf_Byte syminfo,
const Elf_Word symvalue)
{
(void) obj;
(void) rel;
(void) sect;
(void) symname;
(void) syminfo;
(void) symvalue;
rtems_rtl_set_error (EINVAL, "rel type record not supported");
return rtems_rtl_elf_rel_failure;
}
rtems_rtl_elf_rel_status
rtems_rtl_elf_relocate_rel (rtems_rtl_obj* obj,
const Elf_Rel* rel,
const rtems_rtl_obj_sect* sect,
const char* symname,
const Elf_Byte syminfo,
const Elf_Word symvalue)
{
(void) obj;
(void) rel;
(void) sect;
(void) symname;
(void) syminfo;
(void) symvalue;
rtems_rtl_set_error (EINVAL, "rel type record not supported");
return rtems_rtl_elf_rel_failure;
}
bool
rtems_rtl_elf_unwind_parse (const rtems_rtl_obj* 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* obj)
{
return rtems_rtl_elf_unwind_dw2_register (obj);
}
bool
rtems_rtl_elf_unwind_deregister (rtems_rtl_obj* obj)
{
return rtems_rtl_elf_unwind_dw2_deregister (obj);
}
