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Syscall.cpp
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Syscall.cpp
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#include "i386.h"
#include "Process.h"
#include "Syscall.h"
#include "Console.h"
#include "Scheduler.h"
extern "C" void syscall_entry(RegisterDump&);
extern "C" void syscall_ISR();
extern volatile RegisterDump* syscallRegDump;
asm(
".globl syscall_ISR \n"
"syscall_ISR:\n"
" pusha\n"
" pushw %ds\n"
" pushw %es\n"
" pushw %fs\n"
" pushw %gs\n"
" pushw %ss\n"
" pushw %ss\n"
" pushw %ss\n"
" pushw %ss\n"
" pushw %ss\n"
" popw %ds\n"
" popw %es\n"
" popw %fs\n"
" popw %gs\n"
" mov %esp, %eax\n"
" call syscall_entry\n"
" popw %gs\n"
" popw %gs\n"
" popw %fs\n"
" popw %es\n"
" popw %ds\n"
" popa\n"
" iret\n"
);
namespace Syscall {
void initialize()
{
register_user_callable_interrupt_handler(0x80, syscall_ISR);
kprintf("syscall: int 0x80 handler installed\n");
}
int sync()
{
VFS::the().sync();
return 0;
}
static dword handle(RegisterDump& regs, dword function, dword arg1, dword arg2, dword arg3)
{
ASSERT_INTERRUPTS_ENABLED();
switch (function) {
case Syscall::SC_yield:
Scheduler::yield();
break;
case Syscall::SC_putch:
Console::the().put_char(arg1 & 0xff);
break;
case Syscall::SC_sleep:
return current->sys$sleep((unsigned)arg1);
case Syscall::SC_gettimeofday:
return current->sys$gettimeofday((timeval*)arg1);
case Syscall::SC_get_dir_entries:
return current->sys$get_dir_entries((int)arg1, (void*)arg2, (size_t)arg3);
case Syscall::SC_lstat:
return current->sys$lstat((const char*)arg1, (Unix::stat*)arg2);
case Syscall::SC_stat:
return current->sys$stat((const char*)arg1, (Unix::stat*)arg2);
case Syscall::SC_getcwd:
return current->sys$getcwd((char*)arg1, (size_t)arg2);
case Syscall::SC_open:
return current->sys$open((const char*)arg1, (int)arg2);
case Syscall::SC_write:
return current->sys$write((int)arg1, (const void*)arg2, (size_t)arg3);
case Syscall::SC_close:
//kprintf("syscall: close(%d)\n", arg1);
return current->sys$close((int)arg1);
case Syscall::SC_read:
//kprintf("syscall: read(%d, %p, %u)\n", arg1, arg2, arg3);
return current->sys$read((int)arg1, (void*)arg2, (size_t)arg3);
case Syscall::SC_lseek:
return current->sys$lseek((int)arg1, (off_t)arg2, (int)arg3);
case Syscall::SC_kill:
return current->sys$kill((pid_t)arg1, (int)arg2);
case Syscall::SC_getuid:
return current->sys$getuid();
case Syscall::SC_getgid:
return current->sys$getgid();
case Syscall::SC_getpid:
return current->sys$getpid();
case Syscall::SC_getppid:
return current->sys$getppid();
case Syscall::SC_waitpid:
return current->sys$waitpid((pid_t)arg1, (int*)arg2, (int)arg3);
case Syscall::SC_mmap:
return (dword)current->sys$mmap((const SC_mmap_params*)arg1);
case Syscall::SC_munmap:
return current->sys$munmap((void*)arg1, (size_t)arg2);
case Syscall::SC_gethostname:
return current->sys$gethostname((char*)arg1, (size_t)arg2);
case Syscall::SC_exit:
cli();
current->sys$exit((int)arg1);
ASSERT_NOT_REACHED();
return 0;
case Syscall::SC_get_arguments:
return current->sys$get_arguments((int*)arg1, (char***)arg2);
case Syscall::SC_get_environment:
return current->sys$get_environment((char***)arg1);
case Syscall::SC_chdir:
return current->sys$chdir((const char*)arg1);
case Syscall::SC_uname:
return current->sys$uname((utsname*)arg1);
case Syscall::SC_set_mmap_name:
return current->sys$set_mmap_name((void*)arg1, (size_t)arg2, (const char*)arg3);
case Syscall::SC_readlink:
return current->sys$readlink((const char*)arg1, (char*)arg2, (size_t)arg3);
case Syscall::SC_ttyname_r:
return current->sys$ttyname_r((int)arg1, (char*)arg2, (size_t)arg3);
case Syscall::SC_setsid:
return current->sys$setsid();
case Syscall::SC_getsid:
return current->sys$getsid((pid_t)arg1);
case Syscall::SC_setpgid:
return current->sys$setpgid((pid_t)arg1, (pid_t)arg2);
case Syscall::SC_getpgid:
return current->sys$getpgid((pid_t)arg1);
case Syscall::SC_getpgrp:
return current->sys$getpgrp();
case Syscall::SC_fork:
return current->sys$fork(regs);
case Syscall::SC_execve:
return current->sys$execve((const char*)arg1, (const char**)arg2, (const char**)arg3);
case Syscall::SC_geteuid:
return current->sys$geteuid();
case Syscall::SC_getegid:
return current->sys$getegid();
case Syscall::SC_isatty:
return current->sys$isatty((int)arg1);
case Syscall::SC_getdtablesize:
return current->sys$getdtablesize();
case Syscall::SC_dup:
return current->sys$dup((int)arg1);
case Syscall::SC_dup2:
return current->sys$dup2((int)arg1, (int)arg2);
case Syscall::SC_sigaction:
return current->sys$sigaction((int)arg1, (const Unix::sigaction*)arg2, (Unix::sigaction*)arg3);
case Syscall::SC_umask:
return current->sys$umask((mode_t)arg1);
case Syscall::SC_getgroups:
return current->sys$getgroups((int)arg1, (gid_t*)arg2);
case Syscall::SC_setgroups:
return current->sys$setgroups((size_t)arg1, (const gid_t*)arg2);
case Syscall::SC_sigreturn:
current->sys$sigreturn();
ASSERT_NOT_REACHED();
return 0;
case Syscall::SC_sigprocmask:
return current->sys$sigprocmask((int)arg1, (const Unix::sigset_t*)arg2, (Unix::sigset_t*)arg3);
case Syscall::SC_pipe:
return current->sys$pipe((int*)arg1);
case Syscall::SC_killpg:
return current->sys$killpg((int)arg1, (int)arg2);
case Syscall::SC_setuid:
return current->sys$setuid((uid_t)arg1);
case Syscall::SC_setgid:
return current->sys$setgid((gid_t)arg1);
case Syscall::SC_alarm:
return current->sys$alarm((unsigned)arg1);
case Syscall::SC_access:
return current->sys$access((const char*)arg1, (int)arg2);
case Syscall::SC_fcntl:
return current->sys$fcntl((int)arg1, (int)arg2, (dword)arg3);
case Syscall::SC_ioctl:
return current->sys$ioctl((int)arg1, (unsigned)arg2, (unsigned)arg3);
case Syscall::SC_fstat:
return current->sys$fstat((int)arg1, (Unix::stat*)arg2);
case Syscall::SC_mkdir:
return current->sys$mkdir((const char*)arg1, (mode_t)arg2);
case Syscall::SC_times:
return current->sys$times((Unix::tms*)arg1);
case Syscall::SC_utime:
return current->sys$utime((const char*)arg1, (const Unix::utimbuf*)arg2);
case Syscall::SC_sync:
return sync();
default:
kprintf("<%u> int0x80: Unknown function %u requested {%x, %x, %x}\n", current->pid(), function, arg1, arg2, arg3);
break;
}
return 0;
}
}
void syscall_entry(RegisterDump& regs)
{
dword function = regs.eax;
dword arg1 = regs.edx;
dword arg2 = regs.ecx;
dword arg3 = regs.ebx;
regs.eax = Syscall::handle(regs, function, arg1, arg2, arg3);
}