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

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

     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 // Remember that these 'words' are 32bit DWORDS

    12 extern "C" {

    13     static uint32_t

    14     invoke_count_words(uint32_t paramCount, nsXPTCVariant* s)

    15     {

    16         uint32_t result = 0;

    17         for(uint32_t i = 0; i < paramCount; i++, s++)

    18         {

    19             if(s->IsPtrData())

    20             {

    21                 result++;

    22                 continue;

    23             }

    24             switch(s->type)

    25             {

    26             case nsXPTType::T_I8     :

    27             case nsXPTType::T_I16    :

    28             case nsXPTType::T_I32    :

    29                 result++;

    30                 break;

    31             case nsXPTType::T_I64    :

    32                 result+=2;

    33                 break;

    34             case nsXPTType::T_U8     :

    35             case nsXPTType::T_U16    :

    36             case nsXPTType::T_U32    :

    37                 result++;

    38                 break;

    39             case nsXPTType::T_U64    :

    40                 result+=2;

    41                 break;

    42             case nsXPTType::T_FLOAT  :

    43                 result++;

    44                 break;

    45             case nsXPTType::T_DOUBLE :

    46                 result+=2;

    47                 break;

    48             case nsXPTType::T_BOOL   :

    49             case nsXPTType::T_CHAR   :

    50             case nsXPTType::T_WCHAR  :

    51                 result++;

    52                 break;

    53             default:

    54                 // all the others are plain pointer types

    55                 result++;

    56                 break;

    57             }

    58         }

    59         return result;

    60     }

    62     void

    63     invoke_copy_to_stack(uint32_t* d, uint32_t paramCount, nsXPTCVariant* s)

    64     {

    65         for(uint32_t i = 0; i < paramCount; i++, d++, s++)

    66         {

    67             if(s->IsPtrData())

    68             {

    69                 *((void**)d) = s->ptr;

    70                 continue;

    71             }

    72             switch(s->type)

    73             {

    74             // 8 and 16 bit types should be promoted to 32 bits when copying

    75             // onto the stack.

    76             case nsXPTType::T_I8     : *((uint32_t*)d) = s->val.i8;          break;

    77             case nsXPTType::T_I16    : *((uint32_t*)d) = s->val.i16;         break;

    78             case nsXPTType::T_I32    : *((int32_t*) d) = s->val.i32;         break;

    79             case nsXPTType::T_I64    : *((int64_t*) d) = s->val.i64; d++;    break;

    80             case nsXPTType::T_U8     : *((uint32_t*)d) = s->val.u8;          break;

    81             case nsXPTType::T_U16    : *((uint32_t*)d) = s->val.u16;         break;

    82             case nsXPTType::T_U32    : *((uint32_t*)d) = s->val.u32;         break;

    83             case nsXPTType::T_U64    : *((uint64_t*)d) = s->val.u64; d++;    break;

    84             case nsXPTType::T_FLOAT  : *((float*)   d) = s->val.f;           break;

    85             case nsXPTType::T_DOUBLE : *((double*)  d) = s->val.d;   d++;    break;

    86             case nsXPTType::T_BOOL   : *((uint32_t*)d) = s->val.b;           break;

    87             case nsXPTType::T_CHAR   : *((uint32_t*)d) = s->val.c;           break;

    88             case nsXPTType::T_WCHAR  : *((wchar_t*) d) = s->val.wc;          break;

    90             default:

    91                 // all the others are plain pointer types

    92                 *((void**)d) = s->val.p;

    93                 break;

    94             }

    95         }

    96     }

    97 }

    99 EXPORT_XPCOM_API(nsresult)

   100 NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex,

   101                    uint32_t paramCount, nsXPTCVariant* params)

   102 {

   103     uint32_t result, n;

   105     n = invoke_count_words(paramCount, params) * 4;

   107  __asm__ __volatile__(

   108     "subl  %5, %%sp\n\t"      /* make room for params */

   109     "movel %4, %%sp@-\n\t"

   110     "movel %3, %%sp@-\n\t"

   111     "pea   %%sp@(8)\n\t"

   112     "jbsr  invoke_copy_to_stack\n\t"   /* copy params */

   113     "addw  #12, %%sp\n\t"

   114     "movel %1, %%sp@-\n\t"

   115     "movel %1@, %%a0\n\t"

   116     "movel %%a0@(%2:l:4), %%a0\n\t"

   117     "jbsr  %%a0@\n\t"         /* safe to not cleanup sp */

   118     "lea   %%sp@(4,%5:l), %%sp\n\t"

   119     "movel %%d0, %0"

   120     : "=d" (result)         /* %0 */

   121     : "a" (that),           /* %1 */

   122       "d" (methodIndex),    /* %2 */

   123       "g" (paramCount),     /* %3 */

   124       "g" (params),         /* %4 */

   125       "d" (n)               /* %5 */

   126     : "a0", "a1", "d0", "d1", "memory"

   127     );

   129   return result;

   130 }

The Tor Browser / file revision

xpcom/reflect/xptcall/src/md/unix/xptcinvoke_linux_m68k.cpp@129ffea94266

xpcom/reflect/xptcall/src/md/unix/xptcinvoke_linux_m68k.cpp