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Utilities/readelf: Add support for printing the content of sections

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Daniel Bertalan 2022-01-19 22:50:58 +01:00 • committed by Brian Gianforcaro
parent 4055c393fc
commit b509d8a2f7
2 changed files with 19 additions and 2 deletions
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3
Base/usr/share/man/man1/readelf.md
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@ -5,7 +5,7 @@ readelf
## Synopsis ## Synopsis
```sh ```sh
$ readelf [--all] [--file-header] [--program-headers] [--section-headers] [--headers] [--syms] [--dyn-syms] [--dynamic] [--notes] [--relocs] [--unwind] [--checksec] <path> $ readelf [--all] [--file-header] [--program-headers] [--section-headers] [--headers] [--syms] [--dyn-syms] [--dynamic] [--notes] [--relocs] [--unwind] [--checksec] [--string-dump section-name] <path>
``` ```
## Options: ## Options:
@ -24,6 +24,7 @@ $ readelf [--all] [--file-header] [--program-headers] [--section-headers] [--hea
* `-r`, `--relocs`: Display relocations * `-r`, `--relocs`: Display relocations
* `-u`, `--unwind`: Display unwind info * `-u`, `--unwind`: Display unwind info
* `-c`, `--checksec`: Display security hardening info * `-c`, `--checksec`: Display security hardening info
* `-p section-name`, `--string-dump section-name`: Display the contents of a section as strings
## Arguments: ## Arguments:

18
Userland/Utilities/readelf.cpp
View file

@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2020, the SerenityOS developers. * Copyright (c) 2020-2022, the SerenityOS developers.
* *
* SPDX-License-Identifier: BSD-2-Clause * SPDX-License-Identifier: BSD-2-Clause
*/ */
@ -242,6 +242,7 @@ int main(int argc, char** argv)
static bool display_unwind_info = false; static bool display_unwind_info = false;
static bool display_dynamic_section = false; static bool display_dynamic_section = false;
static bool display_hardening = false; static bool display_hardening = false;
StringView string_dump_section {};
Core::ArgsParser args_parser; Core::ArgsParser args_parser;
args_parser.add_option(display_all, "Display all", "all", 'a'); args_parser.add_option(display_all, "Display all", "all", 'a');
@ -256,6 +257,7 @@ int main(int argc, char** argv)
args_parser.add_option(display_relocations, "Display relocations", "relocs", 'r'); args_parser.add_option(display_relocations, "Display relocations", "relocs", 'r');
args_parser.add_option(display_unwind_info, "Display unwind info", "unwind", 'u'); args_parser.add_option(display_unwind_info, "Display unwind info", "unwind", 'u');
args_parser.add_option(display_hardening, "Display security hardening info", "checksec", 'c'); args_parser.add_option(display_hardening, "Display security hardening info", "checksec", 'c');
args_parser.add_option(string_dump_section, "Display the contents of a section as strings", "string-dump", 'p', "section-name");
args_parser.add_positional_argument(path, "ELF path", "path"); args_parser.add_positional_argument(path, "ELF path", "path");
args_parser.parse(argc, argv); args_parser.parse(argc, argv);
@ -717,5 +719,19 @@ int main(int argc, char** argv)
outln(); outln();
} }
if (!string_dump_section.is_null()) {
auto maybe_section = elf_image.lookup_section(string_dump_section);
if (maybe_section.has_value()) {
outln("String dump of section \'{}\':", string_dump_section);
StringView data(maybe_section->raw_data(), maybe_section->size());
data.for_each_split_view('\0', false, [&data](auto string) {
auto offset = string.characters_without_null_termination() - data.characters_without_null_termination();
outln("[{:6x}] {}", offset, string);
});
} else {
warnln("Could not find section \'{}\'", string_dump_section);
return 1;
}
}
return 0; return 0;
} }