aboutsummaryrefslogtreecommitdiffstats
path: root/src/vppinfra/elf_clib.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/vppinfra/elf_clib.h')
-rw-r--r--src/vppinfra/elf_clib.h144
1 files changed, 144 insertions, 0 deletions
diff --git a/src/vppinfra/elf_clib.h b/src/vppinfra/elf_clib.h
new file mode 100644
index 00000000000..25b928c22a5
--- /dev/null
+++ b/src/vppinfra/elf_clib.h
@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ Copyright (c) 2012 Eliot Dresselhaus
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef included_clib_elf_self_h
+#define included_clib_elf_self_h
+
+#include <vppinfra/elf.h>
+#include <vppinfra/hash.h>
+
+#define CLIB_ELF_SECTION_DATA_ALIGN 32
+
+#define CLIB_ELF_SECTION_ADD_PREFIX(n) "clib_elf_section_" n
+
+/* Attribute used is so that static registrations work even if
+ variable is not referenced. */
+#define CLIB_ELF_SECTION(SECTION) \
+ __attribute__ ((used, \
+ aligned (CLIB_ELF_SECTION_DATA_ALIGN), \
+ section (CLIB_ELF_SECTION_ADD_PREFIX (SECTION))))
+
+/* Given pointer to previous data A get next pointer. EXTRA gives extra
+ space beyond A + 1 used in object. */
+#define clib_elf_section_data_next(a,extra) \
+ uword_to_pointer (round_pow2 (pointer_to_uword (a + 1) + (extra), \
+ CLIB_ELF_SECTION_DATA_ALIGN), \
+ void *)
+
+typedef struct
+{
+ void *lo, *hi;
+} clib_elf_section_bounds_t;
+
+typedef struct
+{
+ /* Vector of bounds for this section. Multiple shared objects may have instances
+ of the same sections. */
+ clib_elf_section_bounds_t *bounds;
+
+ /* Name of ELF section (e.g. .text). */
+ u8 *name;
+} clib_elf_section_t;
+
+typedef struct
+{
+ /* Vector of sections. */
+ clib_elf_section_t *sections;
+
+ /* Hash map of name to section index. */
+ uword *section_by_name;
+
+ /* Unix path that we were exec()ed with. */
+ char *exec_path;
+
+ elf_main_t *elf_mains;
+} clib_elf_main_t;
+
+always_inline void
+clib_elf_main_free (clib_elf_main_t * m)
+{
+ clib_elf_section_t *s;
+ vec_foreach (s, m->sections)
+ {
+ vec_free (s->bounds);
+ vec_free (s->name);
+ }
+ vec_free (m->sections);
+ hash_free (m->section_by_name);
+
+ {
+ elf_main_t *em;
+ vec_foreach (em, m->elf_mains)
+ {
+ elf_main_free (em);
+ }
+ vec_free (m->elf_mains);
+ }
+}
+
+/* Call with exec_path equal to argv[0] from C main. */
+void clib_elf_main_init (char *exec_path);
+
+clib_elf_section_bounds_t *clib_elf_get_section_bounds (char *name);
+
+typedef struct
+{
+ /* The symbol. */
+ elf64_symbol_t symbol;
+
+ /* elf_main_t where symbol came from. */
+ u32 elf_main_index;
+
+ /* Symbol table in elf_main_t where this symbol came from. */
+ u32 symbol_table_index;
+} clib_elf_symbol_t;
+
+/* Returns 1 if found; otherwise zero. */
+uword clib_elf_symbol_by_name (char *name, clib_elf_symbol_t * result);
+uword clib_elf_symbol_by_address (uword address, clib_elf_symbol_t * result);
+
+format_function_t format_clib_elf_symbol, format_clib_elf_symbol_with_address;
+
+#endif /* included_clib_elf_self_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */