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LibELF: Separate library resolving into a new function

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Tim Schumacher 2022-04-22 11:46:46 +02:00 committed by Linus Groh
parent a07e12609e
commit 2b7b7f2816
Notes: sideshowbarker 2024-07-17 11:13:38 +09:00 
Author: https://github.com/timschumi
Commit: https://github.com/SerenityOS/serenity/commit/2b7b7f2816
Pull-request: https://github.com/SerenityOS/serenity/pull/13946
1 changed files with 23 additions and 12 deletions
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35
Userland/Libraries/LibELF/DynamicLinker.cpp
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@ -101,15 +101,8 @@ static Result<NonnullRefPtr<DynamicLoader>, DlErrorMessage> map_library(String c
return loader;
}
static Result<NonnullRefPtr<DynamicLoader>, DlErrorMessage> map_library(String const& name, DynamicObject const& parent_object)
static Optional<String> resolve_library(String const& name, DynamicObject const& parent_object)
{
if (name.contains("/"sv)) {
int fd = open(name.characters(), O_RDONLY);
if (fd < 0)
return DlErrorMessage { String::formatted("Could not open shared library: {}", name) };
return map_library(name, fd);
}
Vector<StringView> search_paths;
// Search RPATH values indicated by the ELF (only if RUNPATH is not present).
@ -128,15 +121,33 @@ static Result<NonnullRefPtr<DynamicLoader>, DlErrorMessage> map_library(String c
for (auto const& search_path : search_paths) {
LexicalPath library_path(search_path.replace("$ORIGIN"sv, LexicalPath::dirname(s_main_program_name)));
int fd = open(library_path.append(name).string().characters(), O_RDONLY);
String library_name = library_path.append(name).string();
if (access(library_name.characters(), F_OK) == 0)
return library_name;
}
return {};
}
static Result<NonnullRefPtr<DynamicLoader>, DlErrorMessage> map_library(String const& name, DynamicObject const& parent_object)
{
if (name.contains("/"sv)) {
int fd = open(name.characters(), O_RDONLY);
if (fd < 0)
continue;
return DlErrorMessage { String::formatted("Could not open shared library: {}", name) };
return map_library(name, fd);
}
return DlErrorMessage { String::formatted("Could not find required shared library: {}", name) };
auto resolved_library_name = resolve_library(name, parent_object);
if (!resolved_library_name.has_value())
return DlErrorMessage { String::formatted("Could not find required shared library: {}", name) };
int fd = open(resolved_library_name.value().characters(), O_RDONLY);
if (fd < 0)
return DlErrorMessage { String::formatted("Could not open resolved shared library '{}': {}", resolved_library_name.value(), strerror(errno)) };
return map_library(name, fd);
}
static Vector<String> get_dependencies(String const& name)