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Diffstat (limited to 'lib/mlibc/sysdeps/linux/generic/thread.cpp')
-rw-r--r--lib/mlibc/sysdeps/linux/generic/thread.cpp60
1 files changed, 0 insertions, 60 deletions
diff --git a/lib/mlibc/sysdeps/linux/generic/thread.cpp b/lib/mlibc/sysdeps/linux/generic/thread.cpp
deleted file mode 100644
index e413e4f..0000000
--- a/lib/mlibc/sysdeps/linux/generic/thread.cpp
+++ /dev/null
@@ -1,60 +0,0 @@
-#include <mlibc/thread-entry.hpp>
-#include <mlibc/all-sysdeps.hpp>
-#include <mlibc/thread.hpp>
-#include <bits/ensure.h>
-#include <sys/mman.h>
-#include <stdint.h>
-#include <stddef.h>
-#include <errno.h>
-
-extern "C" void __mlibc_enter_thread(void *entry, void *user_arg) {
- // The linux kernel already sets the TCB in sys_clone().
- auto tcb = mlibc::get_current_tcb();
-
- // Wait until our parent sets up the TID.
- while(!__atomic_load_n(&tcb->tid, __ATOMIC_RELAXED))
- mlibc::sys_futex_wait(&tcb->tid, 0, nullptr);
-
- tcb->invokeThreadFunc(entry, user_arg);
-
- __atomic_store_n(&tcb->didExit, 1, __ATOMIC_RELEASE);
- mlibc::sys_futex_wake(&tcb->didExit);
-
- mlibc::sys_thread_exit();
-}
-
-namespace mlibc {
-
-static constexpr size_t default_stacksize = 0x200000;
-
-int sys_prepare_stack(void **stack, void *entry, void *user_arg, void *tcb, size_t *stack_size, size_t *guard_size, void **stack_base) {
- (void)tcb;
- if (!*stack_size)
- *stack_size = default_stacksize;
-
- uintptr_t map;
- if (*stack) {
- map = reinterpret_cast<uintptr_t>(*stack);
- *guard_size = 0;
- } else {
- map = reinterpret_cast<uintptr_t>(
- mmap(nullptr, *stack_size + *guard_size,
- PROT_NONE,
- MAP_PRIVATE | MAP_ANONYMOUS, -1, 0)
- );
- if (reinterpret_cast<void*>(map) == MAP_FAILED)
- return EAGAIN;
- int ret = mprotect(reinterpret_cast<void*>(map + *guard_size), *stack_size,
- PROT_READ | PROT_WRITE);
- if(ret)
- return EAGAIN;
- }
-
- *stack_base = reinterpret_cast<void*>(map);
- auto sp = reinterpret_cast<uintptr_t*>(map + *guard_size + *stack_size);
- *--sp = reinterpret_cast<uintptr_t>(user_arg);
- *--sp = reinterpret_cast<uintptr_t>(entry);
- *stack = reinterpret_cast<void*>(sp);
- return 0;
-}
-} // namespace mlibc