The Tor Browser: xpcom/reflect/xptcall/src/md/unix/xptcinvoke_ppc

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 /* Platform specific code to invoke XPCOM methods on native objects */

     8 #include "xptcprivate.h"

    10 #ifndef AIX

    11 #error "This code is for PowerPC only"

    12 #endif

    14 extern "C" void

    15 invoke_copy_to_stack(uint32_t* d, uint32_t paramCount, nsXPTCVariant* s, double *fprData)

    16 {

    17 /*

    18     We need to copy the parameters for this function to locals and use them

    19     from there since the parameters occupy the same stack space as the stack

    20     we're trying to populate.

    21 */

    22     uint32_t *l_d = d;

    23     nsXPTCVariant *l_s = s;

    24     uint32_t l_paramCount = paramCount, fpCount = 0;

    25     double *l_fprData = fprData;

    27     typedef struct {

    28         uint32_t hi;

    29         uint32_t lo;

    30     } DU;               // have to move 64 bit entities as 32 bit halves since

    31                         // stack slots are not guaranteed 16 byte aligned

    33     for(uint32_t i = 0; i < l_paramCount; i++, l_d++, l_s++)

    34     {

    35         if(l_s->IsPtrData())

    36         {

    37             *((void**)l_d) = l_s->ptr;

    38             continue;

    39         }

    40         switch(l_s->type)

    41         {

    42         case nsXPTType::T_I8     : *((int32_t*)  l_d) = l_s->val.i8;          break;

    43         case nsXPTType::T_I16    : *((int32_t*)  l_d) = l_s->val.i16;         break;

    44         case nsXPTType::T_I32    : *((int32_t*)  l_d) = l_s->val.i32;         break;

    45         case nsXPTType::T_I64    :

    46         case nsXPTType::T_U64    :

    47             *((uint32_t*) l_d++) = ((DU *)l_s)->hi;

    48             *((uint32_t*) l_d) = ((DU *)l_s)->lo;

    49             break;

    50         case nsXPTType::T_DOUBLE :

    51             *((uint32_t*) l_d++) = ((DU *)l_s)->hi;

    52             *((uint32_t*) l_d) = ((DU *)l_s)->lo;

    53             if(fpCount < 13)

    54                 l_fprData[fpCount++] = l_s->val.d;

    55             break;

    56         case nsXPTType::T_U8     : *((uint32_t*) l_d) = l_s->val.u8;          break;

    57         case nsXPTType::T_U16    : *((uint32_t*) l_d) = l_s->val.u16;         break;

    58         case nsXPTType::T_U32    : *((uint32_t*) l_d) = l_s->val.u32;         break;

    59         case nsXPTType::T_FLOAT  :

    60             *((float*)  l_d) = l_s->val.f;

    61             if(fpCount < 13)

    62                 l_fprData[fpCount++] = l_s->val.f;

    63             break;

    64         case nsXPTType::T_BOOL   : *((uint32_t*) l_d) = l_s->val.b;           break;

    65         case nsXPTType::T_CHAR   : *((uint32_t*) l_d) = l_s->val.c;           break;

    66         case nsXPTType::T_WCHAR  : *((int32_t*)  l_d) = l_s->val.wc;          break;

    67         default:

    68             // all the others are plain pointer types

    69             *((void**)l_d) = l_s->val.p;

    70             break;

    71         }

    72     }

    73 }

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