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#include "i386.h"
#include "Process.h"
#include "Syscall.h"
#include "Console.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()
{
registerUserCallableInterruptHandler(0x80, syscall_ISR);
kprintf("syscall: int 0x80 handler installed\n");
}
DWORD handle(DWORD function, DWORD arg1, DWORD arg2, DWORD arg3)
{
ASSERT_INTERRUPTS_ENABLED();
switch (function) {
case Syscall::Yield:
yield();
break;
case Syscall::PutCharacter:
Console::the().putChar(arg1 & 0xff);
break;
case Syscall::Sleep:
return current->sys$sleep(arg1);
case Syscall::PosixGettimeofday:
return current->sys$gettimeofday((timeval*)arg1);
case Syscall::Spawn:
return current->sys$spawn((const char*)arg1, (const char**)arg2);
case Syscall::GetDirEntries:
return current->sys$get_dir_entries((int)arg1, (void*)arg2, (size_t)arg3);
case Syscall::PosixLstat:
return current->sys$lstat((const char*)arg1, (Unix::stat*)arg2);
case Syscall::PosixStat:
return current->sys$stat((const char*)arg1, (Unix::stat*)arg2);
case Syscall::PosixGetcwd:
return current->sys$getcwd((char*)arg1, (size_t)arg2);
case Syscall::PosixOpen:
return current->sys$open((const char*)arg1, (int)arg2);
case Syscall::PosixWrite:
return current->sys$write((int)arg1, (const void*)arg2, (size_t)arg3);
case Syscall::PosixClose:
//kprintf("syscall: close(%d)\n", arg1);
return current->sys$close((int)arg1);
case Syscall::PosixRead:
//kprintf("syscall: read(%d, %p, %u)\n", arg1, arg2, arg3);
return current->sys$read((int)arg1, (void*)arg2, (size_t)arg3);
case Syscall::PosixLseek:
return current->sys$lseek((int)arg1, (off_t)arg2, (int)arg3);
case Syscall::PosixKill:
return current->sys$kill((pid_t)arg1, (int)arg2);
case Syscall::PosixGetuid:
return current->sys$getuid();
case Syscall::PosixGetgid:
return current->sys$getgid();
case Syscall::PosixGetpid:
return current->sys$getpid();
case Syscall::PosixWaitpid:
return current->sys$waitpid((pid_t)arg1, (int*)arg2, (int)arg3);
case Syscall::PosixMmap:
return (dword)current->sys$mmap((void*)arg1, (size_t)arg2);
case Syscall::PosixMunmap:
return current->sys$munmap((void*)arg1, (size_t)arg2);
case Syscall::PosixGethostname:
return current->sys$gethostname((char*)arg1, (size_t)arg2);
case Syscall::PosixExit:
cli();
current->sys$exit((int)arg1);
ASSERT_NOT_REACHED();
return 0;
case Syscall::GetArguments:
return current->sys$get_arguments((int*)arg1, (char***)arg2);
case Syscall::GetEnvironment:
return current->sys$get_environment((char***)arg1);
case Syscall::PosixChdir:
return current->sys$chdir((const char*)arg1);
case Syscall::PosixUname:
return current->sys$uname((utsname*)arg1);
case Syscall::SetMmapName:
return current->sys$set_mmap_name((void*)arg1, (size_t)arg2, (const char*)arg3);
case Syscall::PosixReadlink:
return current->sys$readlink((const char*)arg1, (char*)arg2, (size_t)arg3);
case Syscall::PosixTtynameR:
return current->sys$ttyname_r((int)arg1, (char*)arg2, (size_t)arg3);
default:
kprintf("<%u> int0x80: Unknown function %x 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(function, arg1, arg2, arg3);
}
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