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/* Common code for ebl reloc functions.
Copyright (C) 2005 Red Hat, Inc.
This program is Open Source software; you can redistribute it and/or
modify it under the terms of the Open Software License version 1.0 as
published by the Open Source Initiative.
You should have received a copy of the Open Software License along
with this program; if not, you may obtain a copy of the Open Software
License version 1.0 from http://www.opensource.org/licenses/osl.php or
by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
3001 King Ranch Road, Ukiah, CA 95482. */
#include "libebl_CPU.h"
#include <assert.h>
#define R_TYPE(name) PASTE (RELOC_PREFIX, name)
#define PASTE(a, b) PASTE_1 (a, b)
#define PASTE_1(a, b) a##b
#define R_NAME(name) R_NAME_1 (RELOC_PREFIX, name)
#define R_NAME_1(prefix, type) R_NAME_2 (prefix, type)
#define R_NAME_2(prefix, type) #prefix #type
#define RELOC_TYPES STRINGIFIED_PASTE (BACKEND, reloc.def)
#define STRINGIFIED_PASTE(a, b) STRINGIFY (PASTE (a, b))
#define STRINGIFY(x) STRINGIFY_1 (x)
#define STRINGIFY_1(x) #x
/* Provide a table of reloc type names, in a PIC-friendly fashion. */
static const struct EBLHOOK(reloc_nametable)
{
char zero;
#define RELOC_TYPE(type, uses) \
char name_##type[sizeof R_NAME (type)];
#include RELOC_TYPES
#undef RELOC_TYPE
} EBLHOOK(reloc_nametable) =
{
'\0',
#define RELOC_TYPE(type, uses) R_NAME (type),
#include RELOC_TYPES
#undef RELOC_TYPE
};
#define reloc_namestr (&EBLHOOK(reloc_nametable).zero)
static const uint_fast16_t EBLHOOK(reloc_nameidx)[] =
{
#define RELOC_TYPE(type, uses) \
[R_TYPE (type)] = offsetof (struct EBLHOOK(reloc_nametable), name_##type),
#include RELOC_TYPES
#undef RELOC_TYPE
};
#define nreloc \
((int) (sizeof EBLHOOK(reloc_nameidx) / sizeof EBLHOOK(reloc_nameidx)[0]))
#define REL (1 << (ET_REL - 1))
#define EXEC (1 << (ET_EXEC - 1))
#define DYN (1 << (ET_DYN - 1))
static const uint8_t EBLHOOK(reloc_valid)[] =
{
#define RELOC_TYPE(type, uses) [R_TYPE (type)] = uses,
#include RELOC_TYPES
#undef RELOC_TYPE
};
#undef REL
#undef EXEC
#undef DYN
const char *
EBLHOOK(reloc_type_name) (int reloc,
char *buf __attribute__ ((unused)),
size_t len __attribute__ ((unused)))
{
if (reloc >= 0 && reloc < nreloc && EBLHOOK(reloc_nameidx)[reloc] != 0)
return &reloc_namestr[EBLHOOK(reloc_nameidx)[reloc]];
return NULL;
}
bool
EBLHOOK(reloc_type_check) (int reloc)
{
return reloc >= 0 && reloc < nreloc && EBLHOOK(reloc_nameidx)[reloc] != 0;
}
bool
EBLHOOK(reloc_valid_use) (Elf *elf, int reloc)
{
uint8_t uses = EBLHOOK(reloc_valid)[reloc];
GElf_Ehdr ehdr_mem;
GElf_Ehdr *ehdr = gelf_getehdr (elf, &ehdr_mem);
assert (ehdr != NULL);
uint8_t type = ehdr->e_type;
return type > ET_NONE && type < ET_CORE && (uses & (1 << (type - 1)));
}
bool
EBLHOOK(copy_reloc_p) (int reloc)
{
return reloc == R_TYPE (COPY);
}
static void
EBLHOOK(init_reloc) (Ebl *ebl)
{
ebl->reloc_type_name = EBLHOOK(reloc_type_name);
ebl->reloc_type_check = EBLHOOK(reloc_type_check);
ebl->reloc_valid_use = EBLHOOK(reloc_valid_use);
ebl->copy_reloc_p = EBLHOOK(copy_reloc_p);
}
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