diff options
Diffstat (limited to 'vpp/vppinfra/vppinfra/test_elf.c')
| -rw-r--r-- | vpp/vppinfra/vppinfra/test_elf.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/vpp/vppinfra/vppinfra/test_elf.c b/vpp/vppinfra/vppinfra/test_elf.c new file mode 100644 index 00000000..84fe0776 --- /dev/null +++ b/vpp/vppinfra/vppinfra/test_elf.c @@ -0,0 +1,217 @@ +/* + * 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: + */ |