kernel/orb/invoke.cc

   1 // orb/invoke.cc -- Method Invocation
   2 //
   3 // This software is copyright (c) 2006 Scott Wood <scott@buserror.net>.
   4 //
   5 // This software is provided 'as-is', without any express or implied warranty.
   6 // In no event will the authors or contributors be held liable for any damages
   7 // arising from the use of this software.
   8 //
   9 // Permission is hereby granted to everyone, free of charge, to use, copy,
  10 // modify, prepare derivative works of, publish, distribute, perform,
  11 // sublicense, and/or sell copies of the Software, provided that the above
  12 // copyright notice and disclaimer of warranty be included in all copies or
  13 // substantial portions of this software.
  14
  15 #include <kern/types.h>
  16 #include <kern/orb.h>
  17 #include <kern/pagealloc.h>
  18 #include <kern/compiler.h>
  19 #include <kern/thread.h>
  20
  21 #include <arch/usercopy.h>
  22
  23 #include <orb.h>
  24
  25 using System::RunTime::ParamInfoBlock;
  26 using namespace ORB;
  27 using Threads::Thread;
  28
  29 namespace ORB {
  30         static CallFrame *new_frame(Thread *thread)
  31         {
  32                 CallStackHeader *hdr = thread->orbstack_top_hdr;
  33
  34                 if (unlikely(thread->orbstack_top == hdr->num_frames - 1)) {
  35                         hdr = static_cast<CallStackHeader *>(Mem::alloc_pages(1));
  36                         new(hdr) CallStackHeader;
  37                         hdr->thread = thread;
  38                         hdr->num_frames = (Arch::page_size - sizeof(CallStackHeader)) /
  39                                           sizeof(CallFrame);
  40
  41                         thread->orbstack_top_hdr->node.add_front(&hdr->node);
  42                         thread->orbstack_top_hdr = hdr;
  43                         thread->orbstack_top = 0;
  44                         return &hdr->frames[0];
  45                 }
  46
  47                 return &hdr->frames[++thread->orbstack_top];
  48         }
  49
  50         ObjectHdr *IDSpace::get_local_hdr(Object *obj)
  51         {
  52                 ObjectHdr *hdr = idrmap.lookup(obj->id);
  53
  54                 if (!hdr)
  55                         return 0;
  56
  57                 return hdr->id;
  58         }
  59 }
  60
  61 extern "C" void invoke_method(u32 objid, u32 methid, ParamInfoBlock *user_pib,
  62                               ulong ret_pc)
  63 {
  64         ParamInfoBlock pib = Arch::copyin(user_pib);
  65         CallFrame *frame = new_frame(curthread);
  66
  67         frame->object = objid;
  68         frame->method = methid;
  69         frame->caller_user_pib = user_pib;
  70         frame->ret_pc = ret_pc;
  71
  72         printf("invoke_method: frame %p object %x method %x pib %p ret %lx\n",
  73                frame, frame->object, frame->method, frame->caller_user_pib,
  74                frame->ret_pc);
  75
  76
  77 }