mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-20 17:58:18 +03:00
c110cf193d
Instead of computing the path length inside the syscall handler, let the caller do that work. This allows us to implement to new variants of open() and creat(), called open_with_path_length() and creat_with_path_length(). These are suitable for use with e.g StringView.
315 lines
13 KiB
C++
315 lines
13 KiB
C++
#include <Kernel/Arch/i386/CPU.h>
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#include <Kernel/Console.h>
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#include <Kernel/Process.h>
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#include <Kernel/IO.h>
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#include <Kernel/ProcessTracer.h>
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#include <Kernel/Scheduler.h>
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#include <Kernel/Syscall.h>
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extern "C" void syscall_trap_entry(RegisterDump&);
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extern "C" void syscall_trap_handler();
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extern volatile RegisterDump* syscallRegDump;
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asm(
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".globl syscall_trap_handler \n"
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"syscall_trap_handler:\n"
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" pusha\n"
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" pushw %ds\n"
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" pushw %es\n"
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" pushw %fs\n"
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" pushw %gs\n"
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" pushw %ss\n"
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" pushw %ss\n"
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" pushw %ss\n"
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" pushw %ss\n"
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" pushw %ss\n"
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" popw %ds\n"
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" popw %es\n"
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" popw %fs\n"
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" popw %gs\n"
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" mov %esp, %eax\n"
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" call syscall_trap_entry\n"
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" popw %gs\n"
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" popw %gs\n"
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" popw %fs\n"
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" popw %es\n"
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" popw %ds\n"
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" popa\n"
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" iret\n");
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namespace Syscall {
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void initialize()
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{
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register_user_callable_interrupt_handler(0x82, syscall_trap_handler);
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kprintf("Syscall: int 0x82 handler installed\n");
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}
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int sync()
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{
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VFS::the().sync();
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return 0;
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}
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static u32 handle(RegisterDump& regs, u32 function, u32 arg1, u32 arg2, u32 arg3)
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{
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current->process().did_syscall();
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ASSERT_INTERRUPTS_ENABLED();
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switch (function) {
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case Syscall::SC_yield:
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Scheduler::yield();
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break;
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case Syscall::SC_beep:
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Scheduler::beep();
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break;
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case Syscall::SC_donate:
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return current->process().sys$donate((int)arg1);
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case Syscall::SC_gettid:
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return current->process().sys$gettid();
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case Syscall::SC_putch:
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Console::the().put_char(arg1 & 0xff);
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break;
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case Syscall::SC_sleep:
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return current->process().sys$sleep((unsigned)arg1);
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case Syscall::SC_usleep:
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return current->process().sys$usleep((unsigned)arg1);
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case Syscall::SC_gettimeofday:
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return current->process().sys$gettimeofday((timeval*)arg1);
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case Syscall::SC_get_dir_entries:
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return current->process().sys$get_dir_entries((int)arg1, (void*)arg2, (size_t)arg3);
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case Syscall::SC_lstat:
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return current->process().sys$lstat((const char*)arg1, (stat*)arg2);
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case Syscall::SC_stat:
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return current->process().sys$stat((const char*)arg1, (stat*)arg2);
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case Syscall::SC_getcwd:
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return current->process().sys$getcwd((char*)arg1, (size_t)arg2);
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case Syscall::SC_open:
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return current->process().sys$open((const SC_open_params*)arg1);
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case Syscall::SC_write:
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return current->process().sys$write((int)arg1, (const u8*)arg2, (ssize_t)arg3);
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case Syscall::SC_close:
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return current->process().sys$close((int)arg1);
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case Syscall::SC_read:
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return current->process().sys$read((int)arg1, (u8*)arg2, (ssize_t)arg3);
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case Syscall::SC_lseek:
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return current->process().sys$lseek((int)arg1, (off_t)arg2, (int)arg3);
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case Syscall::SC_kill:
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return current->process().sys$kill((pid_t)arg1, (int)arg2);
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case Syscall::SC_getuid:
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return current->process().sys$getuid();
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case Syscall::SC_getgid:
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return current->process().sys$getgid();
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case Syscall::SC_getpid:
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return current->process().sys$getpid();
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case Syscall::SC_getppid:
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return current->process().sys$getppid();
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case Syscall::SC_waitpid:
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return current->process().sys$waitpid((pid_t)arg1, (int*)arg2, (int)arg3);
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case Syscall::SC_mmap:
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return (u32)current->process().sys$mmap((const SC_mmap_params*)arg1);
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case Syscall::SC_select:
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return current->process().sys$select((const SC_select_params*)arg1);
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case Syscall::SC_poll:
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return current->process().sys$poll((pollfd*)arg1, (int)arg2, (int)arg3);
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case Syscall::SC_munmap:
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return current->process().sys$munmap((void*)arg1, (size_t)arg2);
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case Syscall::SC_gethostname:
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return current->process().sys$gethostname((char*)arg1, (size_t)arg2);
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case Syscall::SC_exit:
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cli();
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if (auto* tracer = current->process().tracer())
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tracer->did_syscall(function, arg1, arg2, arg3, 0);
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current->process().sys$exit((int)arg1);
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ASSERT_NOT_REACHED();
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return 0;
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case Syscall::SC_exit_thread:
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cli();
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if (auto* tracer = current->process().tracer())
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tracer->did_syscall(function, arg1, arg2, arg3, 0);
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current->process().sys$exit_thread((int)arg1);
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ASSERT_NOT_REACHED();
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break;
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case Syscall::SC_chdir:
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return current->process().sys$chdir((const char*)arg1);
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case Syscall::SC_uname:
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return current->process().sys$uname((utsname*)arg1);
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case Syscall::SC_set_mmap_name:
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return current->process().sys$set_mmap_name((void*)arg1, (size_t)arg2, (const char*)arg3);
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case Syscall::SC_readlink:
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return current->process().sys$readlink((const char*)arg1, (char*)arg2, (size_t)arg3);
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case Syscall::SC_ttyname_r:
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return current->process().sys$ttyname_r((int)arg1, (char*)arg2, (size_t)arg3);
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case Syscall::SC_ptsname_r:
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return current->process().sys$ptsname_r((int)arg1, (char*)arg2, (size_t)arg3);
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case Syscall::SC_setsid:
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return current->process().sys$setsid();
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case Syscall::SC_getsid:
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return current->process().sys$getsid((pid_t)arg1);
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case Syscall::SC_setpgid:
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return current->process().sys$setpgid((pid_t)arg1, (pid_t)arg2);
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case Syscall::SC_getpgid:
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return current->process().sys$getpgid((pid_t)arg1);
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case Syscall::SC_getpgrp:
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return current->process().sys$getpgrp();
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case Syscall::SC_fork:
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return current->process().sys$fork(regs);
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case Syscall::SC_execve:
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return current->process().sys$execve((const char*)arg1, (const char**)arg2, (const char**)arg3);
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case Syscall::SC_geteuid:
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return current->process().sys$geteuid();
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case Syscall::SC_getegid:
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return current->process().sys$getegid();
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case Syscall::SC_isatty:
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return current->process().sys$isatty((int)arg1);
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case Syscall::SC_getdtablesize:
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return current->process().sys$getdtablesize();
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case Syscall::SC_dup:
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return current->process().sys$dup((int)arg1);
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case Syscall::SC_dup2:
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return current->process().sys$dup2((int)arg1, (int)arg2);
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case Syscall::SC_sigaction:
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return current->process().sys$sigaction((int)arg1, (const sigaction*)arg2, (sigaction*)arg3);
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case Syscall::SC_umask:
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return current->process().sys$umask((mode_t)arg1);
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case Syscall::SC_getgroups:
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return current->process().sys$getgroups((ssize_t)arg1, (gid_t*)arg2);
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case Syscall::SC_setgroups:
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return current->process().sys$setgroups((ssize_t)arg1, (const gid_t*)arg2);
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case Syscall::SC_sigreturn:
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if (auto* tracer = current->process().tracer())
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tracer->did_syscall(function, arg1, arg2, arg3, 0);
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current->process().sys$sigreturn();
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ASSERT_NOT_REACHED();
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return 0;
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case Syscall::SC_sigprocmask:
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return current->process().sys$sigprocmask((int)arg1, (const sigset_t*)arg2, (sigset_t*)arg3);
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case Syscall::SC_pipe:
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return current->process().sys$pipe((int*)arg1);
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case Syscall::SC_killpg:
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return current->process().sys$killpg((int)arg1, (int)arg2);
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case Syscall::SC_setuid:
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return current->process().sys$setuid((uid_t)arg1);
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case Syscall::SC_setgid:
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return current->process().sys$setgid((gid_t)arg1);
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case Syscall::SC_alarm:
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return current->process().sys$alarm((unsigned)arg1);
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case Syscall::SC_access:
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return current->process().sys$access((const char*)arg1, (int)arg2);
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case Syscall::SC_fcntl:
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return current->process().sys$fcntl((int)arg1, (int)arg2, (u32)arg3);
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case Syscall::SC_ioctl:
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return current->process().sys$ioctl((int)arg1, (unsigned)arg2, (unsigned)arg3);
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case Syscall::SC_fstat:
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return current->process().sys$fstat((int)arg1, (stat*)arg2);
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case Syscall::SC_mkdir:
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return current->process().sys$mkdir((const char*)arg1, (mode_t)arg2);
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case Syscall::SC_times:
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return current->process().sys$times((tms*)arg1);
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case Syscall::SC_utime:
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return current->process().sys$utime((const char*)arg1, (const utimbuf*)arg2);
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case Syscall::SC_sync:
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return sync();
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case Syscall::SC_link:
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return current->process().sys$link((const char*)arg1, (const char*)arg2);
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case Syscall::SC_unlink:
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return current->process().sys$unlink((const char*)arg1);
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case Syscall::SC_symlink:
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return current->process().sys$symlink((const char*)arg1, (const char*)arg2);
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case Syscall::SC_read_tsc:
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return current->process().sys$read_tsc((u32*)arg1, (u32*)arg2);
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case Syscall::SC_rmdir:
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return current->process().sys$rmdir((const char*)arg1);
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case Syscall::SC_chmod:
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return current->process().sys$chmod((const char*)arg1, (mode_t)arg2);
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case Syscall::SC_fchmod:
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return current->process().sys$fchmod((int)arg1, (mode_t)arg2);
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case Syscall::SC_socket:
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return current->process().sys$socket((int)arg1, (int)arg2, (int)arg3);
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case Syscall::SC_bind:
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return current->process().sys$bind((int)arg1, (const sockaddr*)arg2, (socklen_t)arg3);
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case Syscall::SC_listen:
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return current->process().sys$listen((int)arg1, (int)arg2);
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case Syscall::SC_accept:
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return current->process().sys$accept((int)arg1, (sockaddr*)arg2, (socklen_t*)arg3);
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case Syscall::SC_connect:
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return current->process().sys$connect((int)arg1, (const sockaddr*)arg2, (socklen_t)arg3);
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case Syscall::SC_create_shared_buffer:
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return current->process().sys$create_shared_buffer((pid_t)arg1, (size_t)arg2, (void**)arg3);
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case Syscall::SC_get_shared_buffer:
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return (u32)current->process().sys$get_shared_buffer((int)arg1);
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case Syscall::SC_release_shared_buffer:
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return current->process().sys$release_shared_buffer((int)arg1);
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case Syscall::SC_chown:
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return current->process().sys$chown((const char*)arg1, (uid_t)arg2, (gid_t)arg3);
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case Syscall::SC_fchown:
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return current->process().sys$fchown((int)arg1, (uid_t)arg2, (gid_t)arg3);
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case Syscall::SC_restore_signal_mask:
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return current->process().sys$restore_signal_mask((u32)arg1);
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case Syscall::SC_seal_shared_buffer:
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return current->process().sys$seal_shared_buffer((int)arg1);
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case Syscall::SC_get_shared_buffer_size:
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return current->process().sys$get_shared_buffer_size((int)arg1);
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case Syscall::SC_sendto:
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return current->process().sys$sendto((const SC_sendto_params*)arg1);
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case Syscall::SC_recvfrom:
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return current->process().sys$recvfrom((const SC_recvfrom_params*)arg1);
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case Syscall::SC_getsockopt:
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return current->process().sys$getsockopt((const SC_getsockopt_params*)arg1);
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case Syscall::SC_setsockopt:
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return current->process().sys$setsockopt((const SC_setsockopt_params*)arg1);
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case Syscall::SC_create_thread:
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return current->process().sys$create_thread((int (*)(void*))arg1, (void*)arg2);
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case Syscall::SC_rename:
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return current->process().sys$rename((const char*)arg1, (const char*)arg2);
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case Syscall::SC_shm_open:
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return current->process().sys$shm_open((const char*)arg1, (int)arg2, (mode_t)arg3);
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case Syscall::SC_shm_close:
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return current->process().sys$shm_unlink((const char*)arg1);
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case Syscall::SC_ftruncate:
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return current->process().sys$ftruncate((int)arg1, (off_t)arg2);
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case Syscall::SC_systrace:
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return current->process().sys$systrace((pid_t)arg1);
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case Syscall::SC_mknod:
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return current->process().sys$mknod((const char*)arg1, (mode_t)arg2, (dev_t)arg3);
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case Syscall::SC_writev:
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return current->process().sys$writev((int)arg1, (const struct iovec*)arg2, (int)arg3);
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case Syscall::SC_getsockname:
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return current->process().sys$getsockname((int)arg1, (sockaddr*)arg2, (socklen_t*)arg3);
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case Syscall::SC_getpeername:
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return current->process().sys$getpeername((int)arg1, (sockaddr*)arg2, (socklen_t*)arg3);
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case Syscall::SC_sched_setparam:
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return current->process().sys$sched_setparam((pid_t)arg1, (struct sched_param*)arg2);
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case Syscall::SC_sched_getparam:
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return current->process().sys$sched_setparam((pid_t)arg1, (struct sched_param*)arg2);
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case Syscall::SC_halt: {
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dbgprintf("<%u> halting! acquiring locks...\n");
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FS::lock_all();
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dbgprintf("<%u> halting! syncing...\n");
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FS::sync();
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dbgprintf("<%u> halting! bye, friends...\n");
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IO::out16(0x604, 0x2000);
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break;
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}
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default:
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kprintf("<%u> int0x82: Unknown function %u requested {%x, %x, %x}\n", current->process().pid(), function, arg1, arg2, arg3);
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return -ENOSYS;
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}
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return 0;
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}
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}
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void syscall_trap_entry(RegisterDump& regs)
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{
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current->process().big_lock().lock();
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u32 function = regs.eax;
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u32 arg1 = regs.edx;
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u32 arg2 = regs.ecx;
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u32 arg3 = regs.ebx;
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regs.eax = Syscall::handle(regs, function, arg1, arg2, arg3);
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if (auto* tracer = current->process().tracer())
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tracer->did_syscall(function, arg1, arg2, arg3, regs.eax);
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current->process().big_lock().unlock();
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}
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