michael@0: /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /* Platform specific code to invoke XPCOM methods on native objects */
michael@0: 
michael@0: #include "xptcprivate.h"
michael@0: 
michael@0: // Remember that these 'words' are 32bit DWORDS
michael@0: 
michael@0: extern "C" {
michael@0:     static uint32_t
michael@0:     invoke_count_words(uint32_t paramCount, nsXPTCVariant* s)
michael@0:     {
michael@0:         uint32_t result = 0;
michael@0:         for(uint32_t i = 0; i < paramCount; i++, s++)
michael@0:         {
michael@0:             if(s->IsPtrData())
michael@0:             {
michael@0:                 result++;
michael@0:                 continue;
michael@0:             }
michael@0:             switch(s->type)
michael@0:             {
michael@0:             case nsXPTType::T_I8     :
michael@0:             case nsXPTType::T_I16    :
michael@0:             case nsXPTType::T_I32    :
michael@0:                 result++;
michael@0:                 break;
michael@0:             case nsXPTType::T_I64    :
michael@0:                 result+=2;
michael@0:                 break;
michael@0:             case nsXPTType::T_U8     :
michael@0:             case nsXPTType::T_U16    :
michael@0:             case nsXPTType::T_U32    :
michael@0:                 result++;
michael@0:                 break;
michael@0:             case nsXPTType::T_U64    :
michael@0:                 result+=2;
michael@0:                 break;
michael@0:             case nsXPTType::T_FLOAT  :
michael@0:                 result++;
michael@0:                 break;
michael@0:             case nsXPTType::T_DOUBLE :
michael@0:                 result+=2;
michael@0:                 break;
michael@0:             case nsXPTType::T_BOOL   :
michael@0:             case nsXPTType::T_CHAR   :
michael@0:             case nsXPTType::T_WCHAR  :
michael@0:                 result++;
michael@0:                 break;
michael@0:             default:
michael@0:                 // all the others are plain pointer types
michael@0:                 result++;
michael@0:                 break;
michael@0:             }
michael@0:         }
michael@0:         return result;
michael@0:     }
michael@0: 
michael@0:     void
michael@0:     invoke_copy_to_stack(uint32_t* d, uint32_t paramCount, nsXPTCVariant* s)
michael@0:     {
michael@0:         for(uint32_t i = 0; i < paramCount; i++, d++, s++)
michael@0:         {
michael@0:             if(s->IsPtrData())
michael@0:             {
michael@0:                 *((void**)d) = s->ptr;
michael@0:                 continue;
michael@0:             }
michael@0:             switch(s->type)
michael@0:             {
michael@0:             // 8 and 16 bit types should be promoted to 32 bits when copying
michael@0:             // onto the stack.
michael@0:             case nsXPTType::T_I8     : *((uint32_t*)d) = s->val.i8;          break;
michael@0:             case nsXPTType::T_I16    : *((uint32_t*)d) = s->val.i16;         break;
michael@0:             case nsXPTType::T_I32    : *((int32_t*) d) = s->val.i32;         break;
michael@0:             case nsXPTType::T_I64    : *((int64_t*) d) = s->val.i64; d++;    break;
michael@0:             case nsXPTType::T_U8     : *((uint32_t*)d) = s->val.u8;          break;
michael@0:             case nsXPTType::T_U16    : *((uint32_t*)d) = s->val.u16;         break;
michael@0:             case nsXPTType::T_U32    : *((uint32_t*)d) = s->val.u32;         break;
michael@0:             case nsXPTType::T_U64    : *((uint64_t*)d) = s->val.u64; d++;    break;
michael@0:             case nsXPTType::T_FLOAT  : *((float*)   d) = s->val.f;           break;
michael@0:             case nsXPTType::T_DOUBLE : *((double*)  d) = s->val.d;   d++;    break;
michael@0:             case nsXPTType::T_BOOL   : *((uint32_t*)d) = s->val.b;           break;
michael@0:             case nsXPTType::T_CHAR   : *((uint32_t*)d) = s->val.c;           break;
michael@0:             case nsXPTType::T_WCHAR  : *((wchar_t*) d) = s->val.wc;          break;
michael@0: 
michael@0:             default:
michael@0:                 // all the others are plain pointer types
michael@0:                 *((void**)d) = s->val.p;
michael@0:                 break;
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: }
michael@0: 
michael@0: EXPORT_XPCOM_API(nsresult)
michael@0: NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex,
michael@0:                    uint32_t paramCount, nsXPTCVariant* params)
michael@0: {
michael@0:     uint32_t result, n;
michael@0: 
michael@0:     n = invoke_count_words(paramCount, params) * 4;
michael@0: 
michael@0:  __asm__ __volatile__(
michael@0:     "subl  %5, %%sp\n\t"      /* make room for params */
michael@0:     "movel %4, %%sp@-\n\t"
michael@0:     "movel %3, %%sp@-\n\t"
michael@0:     "pea   %%sp@(8)\n\t"
michael@0:     "jbsr  invoke_copy_to_stack\n\t"   /* copy params */
michael@0:     "addw  #12, %%sp\n\t"
michael@0:     "movel %1, %%sp@-\n\t"
michael@0:     "movel %1@, %%a0\n\t"
michael@0:     "movel %%a0@(%2:l:4), %%a0\n\t"
michael@0:     "jbsr  %%a0@\n\t"         /* safe to not cleanup sp */
michael@0:     "lea   %%sp@(4,%5:l), %%sp\n\t"
michael@0:     "movel %%d0, %0"
michael@0:     : "=d" (result)         /* %0 */
michael@0:     : "a" (that),           /* %1 */
michael@0:       "d" (methodIndex),    /* %2 */
michael@0:       "g" (paramCount),     /* %3 */
michael@0:       "g" (params),         /* %4 */
michael@0:       "d" (n)               /* %5 */
michael@0:     : "a0", "a1", "d0", "d1", "memory"
michael@0:     );
michael@0:   
michael@0:   return result;
michael@0: }