syscall.hpp

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#pragma once
 
#include <cpu_io.h>
 
#include <cstddef>
#include <cstdint>
 
// 参考 Linux 系统调用号
#if defined(__riscv) || defined(__aarch64__)
// RISC-V 64 和 AArch64 使用 asm-generic 编号
inline constexpr uint64_t kSyscallWrite = 64;
inline constexpr uint64_t kSyscallExit = 93;
inline constexpr uint64_t kSyscallYield = 124;
inline constexpr uint64_t kSyscallClone = 220;
inline constexpr uint64_t kSyscallGettid = 178;
inline constexpr uint64_t kSyscallFutex = 98;
inline constexpr uint64_t kSyscallSetTidAddress = 96;
inline constexpr uint64_t kSyscallFork = 1220;
inline constexpr uint64_t kSyscallSleep = 101;
#elif defined(__x86_64__)
// x86_64 使用自己的编号
inline constexpr uint64_t kSyscallWrite = 1;
inline constexpr uint64_t kSyscallExit = 60;
inline constexpr uint64_t kSyscallYield = 24;
inline constexpr uint64_t kSyscallClone = 56;
inline constexpr uint64_t kSyscallGettid = 186;
inline constexpr uint64_t kSyscallFutex = 202;
inline constexpr uint64_t kSyscallSetTidAddress = 218;
inline constexpr uint64_t kSyscallFork = 57;
inline constexpr uint64_t kSyscallSleep = 35;
#else
#error "Unsupported architecture for syscall numbers"
#endif
 
// 由各个架构实现
auto Syscall(uint64_t cause, cpu_io::TrapContext* context) -> void;
 
auto syscall_dispatcher(int64_t syscall_id, uint64_t args[6]) -> int;
 
[[nodiscard]] auto sys_write(int fd, const char* buf, size_t len) -> int;
 
auto sys_exit(int code) -> int;
 
[[nodiscard]] auto sys_yield() -> int;
 
[[nodiscard]] auto sys_sleep(uint64_t ms) -> int;
 
[[nodiscard]] auto sys_clone(uint64_t flags, void* stack, int* parent_tid,
                             int* child_tid, void* tls) -> int;
 
[[nodiscard]] auto sys_fork() -> int;
 
[[nodiscard]] auto sys_gettid() -> int;
 
[[nodiscard]] auto sys_set_tid_address(int* tidptr) -> int;
 
[[nodiscard]] auto sys_futex(int* uaddr, int op, int val, const void* timeout,
                             int* uaddr2, int val3) -> int;
 
[[nodiscard]] auto sys_sched_getaffinity(int pid, size_t cpusetsize,
                                         uint64_t* mask) -> int;
 
[[nodiscard]] auto sys_sched_setaffinity(int pid, size_t cpusetsize,
                                         const uint64_t* mask) -> int;