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elf_clib.h
Go to the documentation of this file.
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/*
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* Copyright (c) 2015 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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Copyright (c) 2012 Eliot Dresselhaus
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef included_clib_elf_self_h
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#define included_clib_elf_self_h
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#include <
vppinfra/elf.h
>
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#include <
vppinfra/hash.h
>
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#define CLIB_ELF_SECTION_DATA_ALIGN 32
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#define CLIB_ELF_SECTION_ADD_PREFIX(n) "clib_elf_section_" n
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/* Attribute used is so that static registrations work even if
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variable is not referenced. */
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#define CLIB_ELF_SECTION(SECTION) \
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__attribute__ ((used, \
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aligned (CLIB_ELF_SECTION_DATA_ALIGN), \
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section (CLIB_ELF_SECTION_ADD_PREFIX (SECTION))))
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/* Given pointer to previous data A get next pointer. EXTRA gives extra
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space beyond A + 1 used in object. */
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#define clib_elf_section_data_next(a,extra) \
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uword_to_pointer (round_pow2 (pointer_to_uword (a + 1) + (extra), \
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CLIB_ELF_SECTION_DATA_ALIGN), \
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void *)
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typedef
struct
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{
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void
*
lo
, *
hi
;
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}
clib_elf_section_bounds_t
;
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typedef
struct
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{
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/* Vector of bounds for this section. Multiple shared objects may have instances
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of the same sections. */
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clib_elf_section_bounds_t
*
bounds
;
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/* Name of ELF section (e.g. .text). */
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u8
*
name
;
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}
clib_elf_section_t
;
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typedef
struct
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{
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/* Vector of sections. */
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clib_elf_section_t
*
sections
;
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/* Hash map of name to section index. */
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uword
*
section_by_name
;
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/* Unix path that we were exec()ed with. */
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char
*
exec_path
;
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elf_main_t
*
elf_mains
;
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}
clib_elf_main_t
;
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always_inline
void
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clib_elf_main_free
(
clib_elf_main_t
* m)
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{
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clib_elf_section_t
*s;
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vec_foreach
(s, m->
sections
)
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{
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vec_free
(s->
bounds
);
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vec_free
(s->
name
);
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}
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vec_free
(m->
sections
);
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hash_free
(m->
section_by_name
);
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{
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elf_main_t
*em;
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vec_foreach
(em, m->
elf_mains
)
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{
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elf_main_free
(em);
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}
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vec_free
(m->
elf_mains
);
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}
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}
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/* Call with exec_path equal to argv[0] from C main. */
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void
clib_elf_main_init
(
char
*exec_path);
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clib_elf_section_bounds_t
*
clib_elf_get_section_bounds
(
char
*name);
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typedef
struct
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{
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/* The symbol. */
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elf64_symbol_t
symbol
;
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/* elf_main_t where symbol came from. */
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u32
elf_main_index
;
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/* Symbol table in elf_main_t where this symbol came from. */
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u32
symbol_table_index
;
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}
clib_elf_symbol_t
;
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/* Returns 1 if found; otherwise zero. */
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uword
clib_elf_symbol_by_name
(
char
*name,
clib_elf_symbol_t
* result);
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uword
clib_elf_symbol_by_address
(
uword
address,
clib_elf_symbol_t
* result);
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format_function_t
format_clib_elf_symbol
,
format_clib_elf_symbol_with_address
;
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#endif
/* included_clib_elf_self_h */
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/*
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* fd.io coding-style-patch-verification: ON
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*
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* Local Variables:
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* eval: (c-set-style "gnu")
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* End:
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*/
clib_elf_main_t::sections
clib_elf_section_t * sections
Definition:
elf_clib.h:80
hi
vmrglw vmrglh hi
Definition:
vector_altivec.h:119
elf_main_free
static void elf_main_free(elf_main_t *em)
Definition:
elf.h:926
clib_elf_main_free
static void clib_elf_main_free(clib_elf_main_t *m)
Definition:
elf_clib.h:92
format_clib_elf_symbol
format_function_t format_clib_elf_symbol
Definition:
elf_clib.h:134
clib_elf_section_bounds_t
Definition:
elf_clib.h:62
format_function_t
u8 *( format_function_t)(u8 *s, va_list *args)
Definition:
format.h:48
clib_elf_section_bounds_t::lo
void * lo
Definition:
elf_clib.h:64
clib_elf_symbol_t
Definition:
elf_clib.h:118
hash.h
clib_elf_section_t::bounds
clib_elf_section_bounds_t * bounds
Definition:
elf_clib.h:71
clib_elf_symbol_by_address
uword clib_elf_symbol_by_address(uword address, clib_elf_symbol_t *result)
Definition:
elf_clib.c:323
always_inline
#define always_inline
Definition:
clib.h:92
clib_elf_symbol_t::symbol
elf64_symbol_t symbol
Definition:
elf_clib.h:121
clib_elf_main_t::exec_path
char * exec_path
Definition:
elf_clib.h:86
clib_elf_symbol_by_name
uword clib_elf_symbol_by_name(char *name, clib_elf_symbol_t *result)
Definition:
elf_clib.c:317
clib_elf_section_t::name
u8 * name
Definition:
elf_clib.h:74
hash_free
#define hash_free(h)
Definition:
hash.h:309
elf.h
clib_elf_main_t::section_by_name
uword * section_by_name
Definition:
elf_clib.h:83
vec_free
#define vec_free(V)
Free vector's memory (no header).
Definition:
vec.h:336
clib_elf_main_t
Definition:
elf_clib.h:77
clib_elf_main_t::elf_mains
elf_main_t * elf_mains
Definition:
elf_clib.h:88
u32
unsigned int u32
Definition:
types.h:88
clib_elf_section_t
Definition:
elf_clib.h:67
clib_elf_main_init
void clib_elf_main_init(char *exec_path)
Definition:
elf_clib.c:257
uword
u64 uword
Definition:
types.h:112
u8
unsigned char u8
Definition:
types.h:56
format_clib_elf_symbol_with_address
format_function_t format_clib_elf_symbol_with_address
Definition:
elf_clib.h:134
clib_elf_symbol_t::elf_main_index
u32 elf_main_index
Definition:
elf_clib.h:124
elf64_symbol_t
Definition:
elf.h:335
clib_elf_get_section_bounds
clib_elf_section_bounds_t * clib_elf_get_section_bounds(char *name)
Definition:
elf_clib.c:267
vec_foreach
#define vec_foreach(var, vec)
Vector iterator.
Definition:
vec_bootstrap.h:184
elf_main_t
Definition:
elf.h:883
clib_elf_symbol_t::symbol_table_index
u32 symbol_table_index
Definition:
elf_clib.h:127
src
vppinfra
elf_clib.h
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