98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/* reloc_riscv.c - position independent ELF shared object relocator
|
|
Copyright (C) 2018 Alexander Graf <agraf@suse.de>
|
|
Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
|
|
Copyright (C) 1999 Hewlett-Packard Co.
|
|
Contributed by David Mosberger <davidm@hpl.hp.com>.
|
|
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* 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.
|
|
* Neither the name of Hewlett-Packard Co. nor the names of its
|
|
contributors may be used to endorse or promote products derived
|
|
from this software without specific prior written permission.
|
|
|
|
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 ANYDIRECT, 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 <efi.h>
|
|
|
|
#include <elf.h>
|
|
|
|
#if __riscv_xlen == 64
|
|
#define Elf_Dyn Elf64_Dyn
|
|
#define Elf_Rela Elf64_Rela
|
|
#define ELF_R_TYPE ELF64_R_TYPE
|
|
#else
|
|
#define Elf_Dyn Elf32_Dyn
|
|
#define Elf_Rela Elf32_Rela
|
|
#define ELF_R_TYPE ELF32_R_TYPE
|
|
#endif
|
|
|
|
efi_status_t EFIAPI _relocate(long ldbase, Elf_Dyn *dyn)
|
|
{
|
|
long relsz = 0, relent = 0;
|
|
Elf_Rela *rel = 0;
|
|
unsigned long *addr;
|
|
int i;
|
|
|
|
for (i = 0; dyn[i].d_tag != DT_NULL; ++i) {
|
|
switch (dyn[i].d_tag) {
|
|
case DT_RELA:
|
|
rel = (Elf_Rela *)((ulong)dyn[i].d_un.d_ptr + ldbase);
|
|
break;
|
|
case DT_RELASZ:
|
|
relsz = dyn[i].d_un.d_val;
|
|
break;
|
|
case DT_RELAENT:
|
|
relent = dyn[i].d_un.d_val;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!rel && relent == 0)
|
|
return EFI_SUCCESS;
|
|
|
|
if (!rel || relent == 0)
|
|
return EFI_LOAD_ERROR;
|
|
|
|
while (relsz > 0) {
|
|
/* apply the relocs */
|
|
switch (ELF_R_TYPE(rel->r_info)) {
|
|
case R_RISCV_RELATIVE:
|
|
addr = (ulong *)(ldbase + rel->r_offset);
|
|
*addr = ldbase + rel->r_addend;
|
|
break;
|
|
default:
|
|
/* Panic */
|
|
while (1) ;
|
|
}
|
|
rel = (Elf_Rela *)((char *)rel + relent);
|
|
relsz -= relent;
|
|
}
|
|
return EFI_SUCCESS;
|
|
}
|