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Kernel/LibC: Replace SYS_{GET,SET}_TLS with SYS_{SET,GET}_{FS,GS}BASE

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This allows userspace to use both registers
This commit is contained in:
Bananymous
2025-11-10 21:48:38 +02:00
parent 7a68ce7e94
commit 89c0ff1a9d
17 changed files with 165 additions and 46 deletions
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40
kernel/kernel/Process.cpp
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@@ -173,7 +173,15 @@ namespace Kernel
auxiliary_vector.span()
));
if (tls_addr.has_value())
thread->set_tls(*tls_addr);
{
#if ARCH(x86_64)
thread->set_fsbase(*tls_addr);
#elif ARCH(i686)
thread->set_gsbase(*tls_addr);
#else
#error
#endif
}
process->add_thread(thread);
process->register_to_scheduler();
@@ -730,7 +738,13 @@ namespace Kernel
{
auto tls_result = TRY(initialize_thread_local_storage(*new_page_table, *executable.master_tls));
TRY(new_mapped_regions.emplace_back(BAN::move(tls_result.region)));
new_thread->set_tls(tls_result.addr);
#if ARCH(x86_64)
new_thread->set_fsbase(tls_result.addr);
#elif ARCH(i686)
new_thread->set_gsbase(tls_result.addr);
#else
#error
#endif
}
// NOTE: this is done before disabling interrupts and moving the threads as
@@ -3016,16 +3030,28 @@ namespace Kernel
return 0;
}
BAN::ErrorOr<long> Process::sys_set_tls(void* addr)
BAN::ErrorOr<long> Process::sys_set_fsbase(void* addr)
{
Thread::current().set_tls(reinterpret_cast<vaddr_t>(addr));
Processor::load_tls();
Thread::current().set_fsbase(reinterpret_cast<vaddr_t>(addr));
Processor::load_fsbase();
return 0;
}
BAN::ErrorOr<long> Process::sys_get_tls()
BAN::ErrorOr<long> Process::sys_get_fsbase()
{
return Thread::current().get_tls();
return Thread::current().get_fsbase();
}
BAN::ErrorOr<long> Process::sys_set_gsbase(void* addr)
{
Thread::current().set_gsbase(reinterpret_cast<vaddr_t>(addr));
Processor::load_gsbase();
return 0;
}
BAN::ErrorOr<long> Process::sys_get_gsbase()
{
return Thread::current().get_gsbase();
}
BAN::ErrorOr<long> Process::sys_pthread_create(const pthread_attr_t* attr, void (*entry)(void*), void* arg)