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LibELF: Consolidate main executable loading a bit

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Merge the load_elf() and commit_elf() functions into a single
load_main_executable() function that takes care of both things.

Also split "stage 3" into two separate stages, keeping the lazy
relocations in stage 3, and adding a stage 4 for calling library
initialization functions.

We also make sure to map the main executable before dealing with
any of its dependencies, to ensure that non-PIE executables get
loaded at their desired address.
This commit is contained in:
Andreas Kling 2021-02-26 14:40:48 +01:00
parent 8456dc87d8
commit 79889ef052
3 changed files with 71 additions and 55 deletions
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11
Userland/Libraries/LibELF/DynamicLoader.cpp
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@ -154,7 +154,10 @@ void* DynamicLoader::symbol_for_name(const StringView& name)
RefPtr<DynamicObject> DynamicLoader::map()
{
VERIFY(!m_dynamic_object);
if (m_dynamic_object) {
// Already mapped.
return nullptr;
}
if (!m_valid) {
dbgln("DynamicLoader::map failed: image is invalid");
@ -245,10 +248,14 @@ RefPtr<DynamicObject> DynamicLoader::load_stage_3(unsigned flags, size_t total_t
#endif
}
call_object_init_functions();
return m_dynamic_object;
}
void DynamicLoader::load_stage_4()
{
call_object_init_functions();
}
void DynamicLoader::do_lazy_relocations(size_t total_tls_size)
{
for (const auto& relocation : m_unresolved_relocations) {