Trying to reduce the ability for a fork bomb to fault the kernel

[tpg/acess2.git] / Kernel / syscalls.c

diff --git a/Kernel/syscalls.c b/Kernel/syscalls.c
index 02b9008..97459c2 100644 (file)
--- a/Kernel/syscalls.c
+++ b/Kernel/syscalls.c
@@ -40,11 +40,18 @@ void SyscallHandler(tSyscallRegs *Regs)
 {
        Uint64  ret = 0;
        Uint    err = -EOK;
+        int    callNum = Regs->Num;
        
-       ENTER("iThread iNum", Threads_GetTID(), Regs->Num);
-       if(Regs->Num < NUM_SYSCALLS)
-               LOG("Syscall %s", cSYSCALL_NAMES[Regs->Num]);
+       #if DEBUG < 2
+       if(callNum != SYS_READ && callNum != SYS_WRITE) {
+       #endif
+       ENTER("iThread iNum", Threads_GetTID(), callNum);
+       if(callNum < NUM_SYSCALLS)
+               LOG("Syscall %s", cSYSCALL_NAMES[callNum]);
        LOG("Arg1: 0x%x, Arg2: 0x%x, Arg3: 0x%x, Arg4: 0x%x", Regs->Arg1, Regs->Arg2, Regs->Arg3, Regs->Arg4);
+       #if DEBUG < 2
+       }
+       #endif
        
        switch(Regs->Num)
        {
@@ -192,10 +199,12 @@ void SyscallHandler(tSyscallRegs *Regs)
                        ret = -1;
                        break;
                }
+               LOG("VFS_Open(\"%s\", 0x%x)", (char*)Regs->Arg1, Regs->Arg2 | VFS_OPENFLAG_USER);
                ret = VFS_Open((char*)Regs->Arg1, Regs->Arg2 | VFS_OPENFLAG_USER);
                break;
        
        case SYS_CLOSE:
+               LOG("VFS_Close(%i)", Regs->Arg1);
                VFS_Close( Regs->Arg1 );
                break;
        
@@ -328,11 +337,17 @@ void SyscallHandler(tSyscallRegs *Regs)
        #endif
        Regs->Error = err;
        #if DEBUG
+       # if DEBUG < 2
+       if( callNum != SYS_READ && callNum != SYS_WRITE ) {
+       # endif
        LOG("err = %i", err);
        if(Regs->Num != SYS_EXECVE)
                LEAVE('x', ret);
        else
                LOG("Actual %i", ret);
+       # if DEBUG < 2
+       }
+       # endif
        #endif
 }