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-rw-r--r--src/vppinfra/test_elf.c217
1 files changed, 217 insertions, 0 deletions
diff --git a/src/vppinfra/test_elf.c b/src/vppinfra/test_elf.c
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+++ b/src/vppinfra/test_elf.c
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+/*
+ * 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) 2008 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.
+*/
+
+#include <vppinfra/elf.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#ifndef CLIB_UNIX
+#error "unix only"
+#endif
+
+static clib_error_t *
+elf_set_interpreter (elf_main_t * em, char *interp)
+{
+ elf_segment_t *g;
+ elf_section_t *s;
+ clib_error_t *error;
+
+ vec_foreach (g, em->segments)
+ {
+ if (g->header.type == ELF_SEGMENT_INTERP)
+ break;
+ }
+
+ if (g >= vec_end (em->segments))
+ return clib_error_return (0, "interpreter not found");
+
+ if (g->header.memory_size < 1 + strlen (interp))
+ return clib_error_return (0,
+ "given interpreter does not fit; must be less than %d bytes (`%s' given)",
+ g->header.memory_size, interp);
+
+ error =
+ elf_get_section_by_start_address (em, g->header.virtual_address, &s);
+ if (error)
+ return error;
+
+ /* Put in new null terminated string. */
+ memset (s->contents, 0, vec_len (s->contents));
+ clib_memcpy (s->contents, interp, strlen (interp));
+
+ return 0;
+}
+
+static void
+delete_dynamic_rpath_entries_from_section (elf_main_t * em, elf_section_t * s)
+{
+ elf64_dynamic_entry_t *e;
+ elf64_dynamic_entry_t *new_es = 0;
+
+ vec_foreach (e, em->dynamic_entries)
+ {
+ switch (e->type)
+ {
+ case ELF_DYNAMIC_ENTRY_RPATH:
+ case ELF_DYNAMIC_ENTRY_RUN_PATH:
+ break;
+
+ default:
+ vec_add1 (new_es, e[0]);
+ break;
+ }
+ }
+
+ /* Pad so as to keep section size constant. */
+ {
+ elf64_dynamic_entry_t e_end;
+ e_end.type = ELF_DYNAMIC_ENTRY_END;
+ e_end.data = 0;
+ while (vec_len (new_es) < vec_len (em->dynamic_entries))
+ vec_add1 (new_es, e_end);
+ }
+
+ elf_set_dynamic_entries (em);
+}
+
+static void
+elf_delete_dynamic_rpath_entries (elf_main_t * em)
+{
+ elf_section_t *s;
+
+ vec_foreach (s, em->sections)
+ {
+ switch (s->header.type)
+ {
+ case ELF_SECTION_DYNAMIC:
+ delete_dynamic_rpath_entries_from_section (em, s);
+ break;
+
+ default:
+ break;
+ }
+ }
+}
+
+typedef struct
+{
+ elf_main_t elf_main;
+ char *input_file;
+ char *output_file;
+ char *set_interpreter;
+ int verbose;
+} elf_test_main_t;
+
+int
+main (int argc, char *argv[])
+{
+ elf_test_main_t _tm, *tm = &_tm;
+ elf_main_t *em = &tm->elf_main;
+ unformat_input_t i;
+ clib_error_t *error = 0;
+
+ memset (tm, 0, sizeof (tm[0]));
+
+ unformat_init_command_line (&i, argv);
+ while (unformat_check_input (&i) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (&i, "in %s", &tm->input_file))
+ ;
+ else if (unformat (&i, "out %s", &tm->output_file))
+ ;
+ else if (unformat (&i, "set-interpreter %s", &tm->set_interpreter))
+ ;
+ else if (unformat (&i, "verbose"))
+ tm->verbose = ~0;
+ else if (unformat (&i, "verbose-symbols"))
+ tm->verbose |= FORMAT_ELF_MAIN_SYMBOLS;
+ else if (unformat (&i, "verbose-relocations"))
+ tm->verbose |= FORMAT_ELF_MAIN_RELOCATIONS;
+ else if (unformat (&i, "verbose-dynamic"))
+ tm->verbose |= FORMAT_ELF_MAIN_DYNAMIC;
+ else
+ {
+ error = unformat_parse_error (&i);
+ goto done;
+ }
+ }
+
+ if (!tm->input_file)
+ {
+ clib_warning ("No input file! Using test_bihash_template");
+ tm->input_file = "test_bihash_template";
+ }
+
+ error = elf_read_file (em, tm->input_file);
+ if (error)
+ goto done;
+
+ if (tm->set_interpreter)
+ {
+ clib_error_t *error = elf_set_interpreter (em, tm->set_interpreter);
+ if (error)
+ goto done;
+ elf_delete_dynamic_rpath_entries (em);
+ }
+
+ if (tm->verbose)
+ fformat (stdout, "%U", format_elf_main, em, tm->verbose);
+
+ if (tm->output_file)
+ error = elf_write_file (em, tm->output_file);
+
+ elf_main_free (em);
+
+done:
+ if (error)
+ {
+ clib_error_report (error);
+ return 1;
+ }
+ else
+ return 0;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */