1/* 2 * Copyright 2017, Data61 3 * Commonwealth Scientific and Industrial Research Organisation (CSIRO) 4 * ABN 41 687 119 230. 5 * 6 * This software may be distributed and modified according to the terms of 7 * the BSD 2-Clause license. Note that NO WARRANTY is provided. 8 * See "LICENSE_BSD2.txt" for details. 9 * 10 * @TAG(DATA61_BSD) 11 */ 12 13#pragma once 14 15#include <autoconf.h> 16#include <sel4muslcsys/gen_config.h> 17#include <stdarg.h> 18#include <stdbool.h> 19#include <bits/syscall.h> 20#include <utils/attribute.h> 21 22#define MUSLCSYS_WITH_VSYSCALL_PRIORITY (CONSTRUCTOR_MIN_PRIORITY + 10) 23 24typedef long (*muslcsys_syscall_t)(va_list); 25 26/* Installs a new handler for the given syscall. Any previous handler is returned 27 * and can be used to provide layers of syscall handling */ 28muslcsys_syscall_t muslcsys_install_syscall(int syscall, muslcsys_syscall_t new_syscall); 29 30/* Some syscalls happen in the C library prior the init constructors being called, 31 * and hence prior to syscall handlers being able to be installed. For such cases 32 * we simply record such occurances and provide functions here for retrieving the 33 * arguments allow a process to do anything necessary once they get to `main`. 34 * These functions return true/false if the syscall was called on boot, and take 35 * pointers for returning the arguments. Pointers must be non NULL 36 */ 37bool muslcsys_get_boot_set_tid_address(int **arg) NONNULL(1); 38#if defined(__NR_set_thread_area) || defined(__ARM_NR_set_tls) 39bool muslcsys_get_boot_set_thread_area(void **arg) NONNULL(1); 40#endif 41