449 lines
18 KiB
C++
449 lines
18 KiB
C++
/*
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* syscall.h
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* MontaukOS program-side syscall wrappers using SYSCALL instruction
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* Copyright (c) 2025 Daniel Hammer
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*/
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#pragma once
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#include <Api/Syscall.hpp>
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namespace montauk {
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// ---- Raw SYSCALL wrappers ----
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// The SYSCALL handler does not restore RDI, RSI, RDX, R10, R8, R9
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// (they are skipped on the return path). We move arguments into the
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// correct registers inside the asm block and list ALL argument
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// registers in the clobber list. This guarantees the compiler
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// reloads every argument on each call — GCC cannot optimise away
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// clobbers, unlike "+r" outputs whose dead values it may discard.
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inline int64_t syscall0(uint64_t nr) {
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int64_t ret;
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asm volatile("syscall" : "=a"(ret) : "a"(nr)
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: "rcx", "r11", "rdi", "rsi", "rdx", "r8", "r9", "r10", "memory");
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return ret;
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}
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inline int64_t syscall1(uint64_t nr, uint64_t a1) {
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int64_t ret;
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asm volatile(
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"mov %[a1], %%rdi\n\t"
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"syscall"
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: "=a"(ret)
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: "a"(nr), [a1] "r"(a1)
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: "rcx", "r11", "rdi", "rsi", "rdx", "r8", "r9", "r10", "memory");
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return ret;
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}
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inline int64_t syscall2(uint64_t nr, uint64_t a1, uint64_t a2) {
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int64_t ret;
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asm volatile(
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"mov %[a1], %%rdi\n\t"
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"mov %[a2], %%rsi\n\t"
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"syscall"
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: "=a"(ret)
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: "a"(nr), [a1] "r"(a1), [a2] "r"(a2)
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: "rcx", "r11", "rdi", "rsi", "rdx", "r8", "r9", "r10", "memory");
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return ret;
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}
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inline int64_t syscall3(uint64_t nr, uint64_t a1, uint64_t a2, uint64_t a3) {
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int64_t ret;
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asm volatile(
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"mov %[a1], %%rdi\n\t"
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"mov %[a2], %%rsi\n\t"
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"mov %[a3], %%rdx\n\t"
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"syscall"
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: "=a"(ret)
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: "a"(nr), [a1] "r"(a1), [a2] "r"(a2), [a3] "r"(a3)
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: "rcx", "r11", "rdi", "rsi", "rdx", "r8", "r9", "r10", "memory");
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return ret;
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}
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inline int64_t syscall4(uint64_t nr, uint64_t a1, uint64_t a2, uint64_t a3, uint64_t a4) {
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int64_t ret;
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asm volatile(
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"mov %[a1], %%rdi\n\t"
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"mov %[a2], %%rsi\n\t"
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"mov %[a3], %%rdx\n\t"
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"mov %[a4], %%r10\n\t"
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"syscall"
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: "=a"(ret)
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: "a"(nr), [a1] "r"(a1), [a2] "r"(a2), [a3] "r"(a3), [a4] "r"(a4)
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: "rcx", "r11", "rdi", "rsi", "rdx", "r8", "r9", "r10", "memory");
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return ret;
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}
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inline int64_t syscall5(uint64_t nr, uint64_t a1, uint64_t a2, uint64_t a3, uint64_t a4, uint64_t a5) {
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int64_t ret;
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asm volatile(
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"mov %[a1], %%rdi\n\t"
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"mov %[a2], %%rsi\n\t"
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"mov %[a3], %%rdx\n\t"
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"mov %[a4], %%r10\n\t"
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"mov %[a5], %%r8\n\t"
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"syscall"
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: "=a"(ret)
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: "a"(nr), [a1] "r"(a1), [a2] "r"(a2), [a3] "r"(a3), [a4] "r"(a4), [a5] "r"(a5)
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: "rcx", "r11", "rdi", "rsi", "rdx", "r8", "r9", "r10", "memory");
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return ret;
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}
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inline int64_t syscall6(uint64_t nr, uint64_t a1, uint64_t a2, uint64_t a3, uint64_t a4, uint64_t a5, uint64_t a6) {
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int64_t ret;
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asm volatile(
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"mov %[a1], %%rdi\n\t"
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"mov %[a2], %%rsi\n\t"
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"mov %[a3], %%rdx\n\t"
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"mov %[a4], %%r10\n\t"
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"mov %[a5], %%r8\n\t"
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"mov %[a6], %%r9\n\t"
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"syscall"
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: "=a"(ret)
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: "a"(nr), [a1] "r"(a1), [a2] "r"(a2), [a3] "r"(a3), [a4] "r"(a4), [a5] "r"(a5), [a6] "r"(a6)
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: "rcx", "r11", "rdi", "rsi", "rdx", "r8", "r9", "r10", "memory");
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return ret;
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}
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// ---- Typed wrappers ----
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// Process
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[[noreturn]] inline void exit(int code = 0) {
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syscall1(Montauk::SYS_EXIT, (uint64_t)code);
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__builtin_unreachable();
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}
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inline void yield() { syscall0(Montauk::SYS_YIELD); }
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inline void sleep_ms(uint64_t ms) { syscall1(Montauk::SYS_SLEEP_MS, ms); }
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inline int getpid() { return (int)syscall0(Montauk::SYS_GETPID); }
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inline int spawn(const char* path, const char* args = nullptr) {
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return (int)syscall2(Montauk::SYS_SPAWN, (uint64_t)path, (uint64_t)args);
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}
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// Console
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inline void print(const char* text) { syscall1(Montauk::SYS_PRINT, (uint64_t)text); }
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inline void putchar(char c) { syscall1(Montauk::SYS_PUTCHAR, (uint64_t)c); }
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// File I/O
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inline int open(const char* path) { return (int)syscall1(Montauk::SYS_OPEN, (uint64_t)path); }
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inline int read(int handle, uint8_t* buf, uint64_t off, uint64_t size) {
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return (int)syscall4(Montauk::SYS_READ, (uint64_t)handle, (uint64_t)buf, off, size);
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}
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inline uint64_t getsize(int handle) { return (uint64_t)syscall1(Montauk::SYS_GETSIZE, (uint64_t)handle); }
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inline void close(int handle) { syscall1(Montauk::SYS_CLOSE, (uint64_t)handle); }
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inline int readdir(const char* path, const char** names, int max) {
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return (int)syscall3(Montauk::SYS_READDIR, (uint64_t)path, (uint64_t)names, (uint64_t)max);
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}
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// File write/create
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inline int fwrite(int handle, const uint8_t* buf, uint64_t off, uint64_t size) {
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return (int)syscall4(Montauk::SYS_FWRITE, (uint64_t)handle, (uint64_t)buf, off, size);
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}
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inline int fcreate(const char* path) {
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return (int)syscall1(Montauk::SYS_FCREATE, (uint64_t)path);
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}
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inline int fdelete(const char* path) {
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return (int)syscall1(Montauk::SYS_FDELETE, (uint64_t)path);
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}
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inline int fmkdir(const char* path) {
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return (int)syscall1(Montauk::SYS_FMKDIR, (uint64_t)path);
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}
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inline int drivelist(int* outDrives, int max) {
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return (int)syscall2(Montauk::SYS_DRIVELIST, (uint64_t)outDrives, (uint64_t)max);
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}
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// Memory
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inline void* alloc(uint64_t size) { return (void*)syscall1(Montauk::SYS_ALLOC, size); }
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inline void free(void* ptr) { syscall1(Montauk::SYS_FREE, (uint64_t)ptr); }
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// Timekeeping
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inline uint64_t get_ticks() { return (uint64_t)syscall0(Montauk::SYS_GETTICKS); }
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inline uint64_t get_milliseconds() { return (uint64_t)syscall0(Montauk::SYS_GETMILLISECONDS); }
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// System
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inline void get_info(Montauk::SysInfo* info) { syscall1(Montauk::SYS_GETINFO, (uint64_t)info); }
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// Keyboard
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inline bool is_key_available() { return (bool)syscall0(Montauk::SYS_ISKEYAVAILABLE); }
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inline void getkey(Montauk::KeyEvent* out) { syscall1(Montauk::SYS_GETKEY, (uint64_t)out); }
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inline char getchar() { return (char)syscall0(Montauk::SYS_GETCHAR); }
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// Networking
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inline int32_t ping(uint32_t ip, uint32_t timeoutMs = 3000) {
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return (int32_t)syscall2(Montauk::SYS_PING, (uint64_t)ip, (uint64_t)timeoutMs);
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}
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// DNS resolve: returns IP in network byte order, or 0 on failure
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inline uint32_t resolve(const char* hostname) {
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return (uint32_t)syscall1(Montauk::SYS_RESOLVE, (uint64_t)hostname);
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}
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// Network configuration
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inline void get_netcfg(Montauk::NetCfg* out) { syscall1(Montauk::SYS_GETNETCFG, (uint64_t)out); }
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inline int set_netcfg(const Montauk::NetCfg* cfg) { return (int)syscall1(Montauk::SYS_SETNETCFG, (uint64_t)cfg); }
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// Sockets
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inline int socket(int type) {
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return (int)syscall1(Montauk::SYS_SOCKET, (uint64_t)type);
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}
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inline int connect(int fd, uint32_t ip, uint16_t port) {
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return (int)syscall3(Montauk::SYS_CONNECT, (uint64_t)fd, (uint64_t)ip, (uint64_t)port);
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}
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inline int bind(int fd, uint16_t port) {
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return (int)syscall2(Montauk::SYS_BIND, (uint64_t)fd, (uint64_t)port);
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}
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inline int listen(int fd) {
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return (int)syscall1(Montauk::SYS_LISTEN, (uint64_t)fd);
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}
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inline int accept(int fd) {
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return (int)syscall1(Montauk::SYS_ACCEPT, (uint64_t)fd);
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}
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inline int send(int fd, const void* data, uint32_t len) {
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return (int)syscall3(Montauk::SYS_SEND, (uint64_t)fd, (uint64_t)data, (uint64_t)len);
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}
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inline int recv(int fd, void* buf, uint32_t maxLen) {
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return (int)syscall3(Montauk::SYS_RECV, (uint64_t)fd, (uint64_t)buf, (uint64_t)maxLen);
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}
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inline int closesocket(int fd) {
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return (int)syscall1(Montauk::SYS_CLOSESOCK, (uint64_t)fd);
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}
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inline int sendto(int fd, const void* data, uint32_t len, uint32_t destIp, uint16_t destPort) {
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return (int)syscall5(Montauk::SYS_SENDTO, (uint64_t)fd, (uint64_t)data,
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(uint64_t)len, (uint64_t)destIp, (uint64_t)destPort);
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}
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inline int recvfrom(int fd, void* buf, uint32_t maxLen, uint32_t* srcIp, uint16_t* srcPort) {
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return (int)syscall5(Montauk::SYS_RECVFROM, (uint64_t)fd, (uint64_t)buf,
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(uint64_t)maxLen, (uint64_t)srcIp, (uint64_t)srcPort);
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}
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// Process management
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inline void waitpid(int pid) { syscall1(Montauk::SYS_WAITPID, (uint64_t)pid); }
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// Framebuffer
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inline void fb_info(Montauk::FbInfo* info) { syscall1(Montauk::SYS_FBINFO, (uint64_t)info); }
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inline void* fb_map() { return (void*)syscall0(Montauk::SYS_FBMAP); }
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// Arguments
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inline int getargs(char* buf, uint64_t maxLen) {
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return (int)syscall2(Montauk::SYS_GETARGS, (uint64_t)buf, maxLen);
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}
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// Terminal
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inline void termsize(int* cols, int* rows) {
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uint64_t r = (uint64_t)syscall0(Montauk::SYS_TERMSIZE);
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if (cols) *cols = (int)(r & 0xFFFFFFFF);
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if (rows) *rows = (int)(r >> 32);
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}
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inline void termscale(int scale_x, int scale_y) {
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syscall2(Montauk::SYS_TERMSCALE, (uint64_t)scale_x, (uint64_t)scale_y);
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}
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inline void get_termscale(int* scale_x, int* scale_y) {
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uint64_t r = (uint64_t)syscall2(Montauk::SYS_TERMSCALE, 0, 0);
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if (scale_x) *scale_x = (int)(r & 0xFFFFFFFF);
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if (scale_y) *scale_y = (int)(r >> 32);
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}
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// Timekeeping (wall-clock)
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inline void gettime(Montauk::DateTime* out) { syscall1(Montauk::SYS_GETTIME, (uint64_t)out); }
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// Timezone offset (total minutes from UTC)
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inline void settz(int offset_minutes) { syscall1(Montauk::SYS_SETTZ, (uint64_t)(int64_t)offset_minutes); }
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inline int gettz() { return (int)syscall0(Montauk::SYS_GETTZ); }
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// Random number generation
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inline int64_t getrandom(void* buf, uint32_t len) {
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return syscall2(Montauk::SYS_GETRANDOM, (uint64_t)buf, (uint64_t)len);
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}
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// Power management
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[[noreturn]] inline void reset() {
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syscall0(Montauk::SYS_RESET);
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__builtin_unreachable();
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}
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[[noreturn]] inline void shutdown() {
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syscall0(Montauk::SYS_SHUTDOWN);
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__builtin_unreachable();
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}
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inline int suspend() {
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return (int)syscall0(Montauk::SYS_SUSPEND);
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}
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// Mouse
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inline void mouse_state(Montauk::MouseState* out) { syscall1(Montauk::SYS_MOUSESTATE, (uint64_t)out); }
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inline void set_mouse_bounds(int32_t maxX, int32_t maxY) {
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syscall2(Montauk::SYS_SETMOUSEBOUNDS, (uint64_t)maxX, (uint64_t)maxY);
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}
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// Kernel log
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inline int64_t read_klog(char* buf, uint64_t size) {
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return syscall2(Montauk::SYS_KLOG, (uint64_t)buf, size);
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}
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// I/O redirection
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inline int spawn_redir(const char* path, const char* args = nullptr) {
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return (int)syscall2(Montauk::SYS_SPAWN_REDIR, (uint64_t)path, (uint64_t)args);
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}
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inline int childio_read(int childPid, char* buf, int maxLen) {
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return (int)syscall3(Montauk::SYS_CHILDIO_READ, (uint64_t)childPid, (uint64_t)buf, (uint64_t)maxLen);
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}
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inline int childio_write(int childPid, const char* data, int len) {
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return (int)syscall3(Montauk::SYS_CHILDIO_WRITE, (uint64_t)childPid, (uint64_t)data, (uint64_t)len);
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}
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inline int childio_writekey(int childPid, const Montauk::KeyEvent* key) {
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return (int)syscall2(Montauk::SYS_CHILDIO_WRITEKEY, (uint64_t)childPid, (uint64_t)key);
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}
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inline int childio_settermsz(int childPid, int cols, int rows) {
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return (int)syscall3(Montauk::SYS_CHILDIO_SETTERMSZ, (uint64_t)childPid, (uint64_t)cols, (uint64_t)rows);
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}
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// Process listing / kill
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inline int proclist(Montauk::ProcInfo* buf, int max) {
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return (int)syscall2(Montauk::SYS_PROCLIST, (uint64_t)buf, (uint64_t)max);
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}
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inline int kill(int pid) {
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return (int)syscall1(Montauk::SYS_KILL, (uint64_t)pid);
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}
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inline int devlist(Montauk::DevInfo* buf, int max) {
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return (int)syscall2(Montauk::SYS_DEVLIST, (uint64_t)buf, (uint64_t)max);
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}
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inline int diskinfo(Montauk::DiskInfo* buf, int port) {
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return (int)syscall2(Montauk::SYS_DISKINFO, (uint64_t)buf, (uint64_t)port);
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}
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// Partition table
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inline int partlist(Montauk::PartInfo* buf, int max) {
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return (int)syscall2(Montauk::SYS_PARTLIST, (uint64_t)buf, (uint64_t)max);
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}
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// Raw block device I/O (driver-agnostic)
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inline int64_t disk_read(int blockDev, uint64_t lba, uint32_t sectorCount, void* buf) {
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return syscall4(Montauk::SYS_DISKREAD, (uint64_t)blockDev, lba,
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(uint64_t)sectorCount, (uint64_t)buf);
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}
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inline int64_t disk_write(int blockDev, uint64_t lba, uint32_t sectorCount, const void* buf) {
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return syscall4(Montauk::SYS_DISKWRITE, (uint64_t)blockDev, lba,
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(uint64_t)sectorCount, (uint64_t)buf);
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}
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// GPT management
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inline int gpt_init(int blockDev) {
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return (int)syscall1(Montauk::SYS_GPTINIT, (uint64_t)blockDev);
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}
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inline int gpt_add(const Montauk::GptAddParams* params) {
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return (int)syscall1(Montauk::SYS_GPTADD, (uint64_t)params);
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}
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inline int fs_mount(int partIndex, int driveNum) {
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return (int)syscall2(Montauk::SYS_FSMOUNT, (uint64_t)partIndex, (uint64_t)driveNum);
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}
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inline int fs_format(const Montauk::FsFormatParams* params) {
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return (int)syscall1(Montauk::SYS_FSFORMAT, (uint64_t)params);
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}
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// Audio
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inline int audio_open(uint32_t sampleRate, uint8_t channels, uint8_t bitsPerSample) {
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return (int)syscall3(Montauk::SYS_AUDIOOPEN, (uint64_t)sampleRate,
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(uint64_t)channels, (uint64_t)bitsPerSample);
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}
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inline void audio_close(int handle) {
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syscall1(Montauk::SYS_AUDIOCLOSE, (uint64_t)handle);
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}
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inline int audio_write(int handle, const void* data, uint32_t size) {
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return (int)syscall3(Montauk::SYS_AUDIOWRITE, (uint64_t)handle,
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(uint64_t)data, (uint64_t)size);
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}
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inline int audio_ctl(int handle, int cmd, int value) {
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return (int)syscall3(Montauk::SYS_AUDIOCTL, (uint64_t)handle,
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(uint64_t)cmd, (uint64_t)value);
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}
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inline int audio_set_volume(int handle, int percent) {
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return audio_ctl(handle, Montauk::AUDIO_CTL_SET_VOLUME, percent);
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}
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inline int audio_get_volume(int handle) {
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return audio_ctl(handle, Montauk::AUDIO_CTL_GET_VOLUME, 0);
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}
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inline int audio_get_pos(int handle) {
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return audio_ctl(handle, Montauk::AUDIO_CTL_GET_POS, 0);
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}
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inline int audio_pause(int handle) {
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return audio_ctl(handle, Montauk::AUDIO_CTL_PAUSE, 1);
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}
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inline int audio_resume(int handle) {
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return audio_ctl(handle, Montauk::AUDIO_CTL_PAUSE, 0);
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}
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inline int audio_get_output(int handle) {
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return audio_ctl(handle, Montauk::AUDIO_CTL_GET_OUTPUT, 0);
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}
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inline int audio_bt_status(int handle) {
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return audio_ctl(handle, Montauk::AUDIO_CTL_BT_STATUS, 0);
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}
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|
|
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// Bluetooth
|
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inline int bt_scan(Montauk::BtScanResult* buf, int maxCount, uint32_t timeoutMs) {
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return (int)syscall3(Montauk::SYS_BTSCAN, (uint64_t)buf, (uint64_t)maxCount, (uint64_t)timeoutMs);
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}
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inline int bt_connect(const uint8_t* bdAddr) {
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return (int)syscall1(Montauk::SYS_BTCONNECT, (uint64_t)bdAddr);
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}
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inline int bt_disconnect(const uint8_t* bdAddr) {
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return (int)syscall1(Montauk::SYS_BTDISCONNECT, (uint64_t)bdAddr);
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|
}
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inline int bt_list(Montauk::BtDevInfo* buf, int maxCount) {
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|
return (int)syscall2(Montauk::SYS_BTLIST, (uint64_t)buf, (uint64_t)maxCount);
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|
}
|
|
inline int bt_info(Montauk::BtAdapterInfo* buf) {
|
|
return (int)syscall1(Montauk::SYS_BTINFO, (uint64_t)buf);
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|
}
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|
|
|
// Kernel introspection
|
|
inline void memstats(Montauk::MemStats* out) { syscall1(Montauk::SYS_MEMSTATS, (uint64_t)out); }
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|
|
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// User management
|
|
inline int setuser(int pid, const char* name) {
|
|
return (int)syscall2(Montauk::SYS_SETUSER, (uint64_t)pid, (uint64_t)name);
|
|
}
|
|
inline int getuser(char* buf, uint64_t maxLen) {
|
|
return (int)syscall2(Montauk::SYS_GETUSER, (uint64_t)buf, maxLen);
|
|
}
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|
|
|
// Window server
|
|
inline int win_create(const char* title, int w, int h, Montauk::WinCreateResult* result) {
|
|
return (int)syscall4(Montauk::SYS_WINCREATE, (uint64_t)title, (uint64_t)w, (uint64_t)h, (uint64_t)result);
|
|
}
|
|
inline int win_destroy(int id) {
|
|
return (int)syscall1(Montauk::SYS_WINDESTROY, (uint64_t)id);
|
|
}
|
|
inline uint64_t win_present(int id) {
|
|
return (uint64_t)syscall1(Montauk::SYS_WINPRESENT, (uint64_t)id);
|
|
}
|
|
inline int win_poll(int id, Montauk::WinEvent* event) {
|
|
return (int)syscall2(Montauk::SYS_WINPOLL, (uint64_t)id, (uint64_t)event);
|
|
}
|
|
inline int win_enumerate(Montauk::WinInfo* info, int max) {
|
|
return (int)syscall2(Montauk::SYS_WINENUM, (uint64_t)info, (uint64_t)max);
|
|
}
|
|
inline uint64_t win_map(int id) {
|
|
return (uint64_t)syscall1(Montauk::SYS_WINMAP, (uint64_t)id);
|
|
}
|
|
inline int win_sendevent(int id, const Montauk::WinEvent* event) {
|
|
return (int)syscall2(Montauk::SYS_WINSENDEVENT, (uint64_t)id, (uint64_t)event);
|
|
}
|
|
inline uint64_t win_resize(int id, int w, int h) {
|
|
return (uint64_t)syscall3(Montauk::SYS_WINRESIZE, (uint64_t)id, (uint64_t)w, (uint64_t)h);
|
|
}
|
|
inline int win_setscale(int scale) {
|
|
return (int)syscall1(Montauk::SYS_WINSETSCALE, (uint64_t)scale);
|
|
}
|
|
inline int win_getscale() {
|
|
return (int)syscall0(Montauk::SYS_WINGETSCALE);
|
|
}
|
|
inline int win_setcursor(int id, int cursor) {
|
|
return (int)syscall2(Montauk::SYS_WINSETCURSOR, (uint64_t)id, (uint64_t)cursor);
|
|
}
|
|
|
|
}
|