lib/mlibc/sysdeps/hyra/generic/entry.cpp


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#include <bits/ensure.h>
#include <mlibc/elf/startup.h>
#include <stdint.h>
#include <stdlib.h>

// defined by the POSIX library
void __mlibc_initLocale();

extern "C" uintptr_t *__dlapi_entrystack();

extern char **environ;
static mlibc::exec_stack_data __mlibc_stack_data;

struct LibraryGuard {
    LibraryGuard();
};

static LibraryGuard guard;

LibraryGuard::LibraryGuard() {
    __mlibc_initLocale();

    // Parse the exec() stack.
    mlibc::parse_exec_stack(__dlapi_entrystack(), &__mlibc_stack_data);
    mlibc::set_startup_data(__mlibc_stack_data.argc, __mlibc_stack_data.argv,
                            __mlibc_stack_data.envp);
}

extern "C" void __mlibc_entry(int (*main_fn)(int argc, char *argv[],
                                             char *env[])) {
    // TODO: call __dlapi_enter, otherwise static builds will break (see Linux
    // sysdeps)
    auto result = main_fn(__mlibc_stack_data.argc, __mlibc_stack_data.argv, environ);
    exit(result);
}