зеркало из https://github.com/mozilla/gecko-dev.git
132 строки
4.3 KiB
C++
132 строки
4.3 KiB
C++
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* Platform specific code to invoke XPCOM methods on native objects */
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#include "xptcprivate.h"
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/* solaris defines __sparc for workshop compilers and
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linux defines __sparc__ */
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#if !defined(__sparc) && !defined(__sparc__)
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#error "This code is for Sparc only"
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#endif
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typedef unsigned nsXPCVariant;
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extern "C" uint32_t
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invoke_count_words(uint32_t paramCount, nsXPTCVariant* s)
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{
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uint32_t result = 0;
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for(uint32_t i = 0; i < paramCount; i++, s++)
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{
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if(s->IsPtrData())
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{
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result++;
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continue;
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}
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switch(s->type)
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{
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case nsXPTType::T_I8 :
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case nsXPTType::T_I16 :
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case nsXPTType::T_I32 :
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result++;
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break;
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case nsXPTType::T_I64 :
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result+=2;
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break;
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case nsXPTType::T_U8 :
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case nsXPTType::T_U16 :
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case nsXPTType::T_U32 :
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result++;
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break;
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case nsXPTType::T_U64 :
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result+=2;
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break;
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case nsXPTType::T_FLOAT :
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result++;
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break;
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case nsXPTType::T_DOUBLE :
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result+=2;
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break;
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case nsXPTType::T_BOOL :
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case nsXPTType::T_CHAR :
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case nsXPTType::T_WCHAR :
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result++;
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break;
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default:
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// all the others are plain pointer types
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result++;
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break;
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}
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}
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// nuts, I know there's a cooler way of doing this, but it's late
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// now and it'll probably come to me in the morning.
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if (result & 0x3) result += 4 - (result & 0x3); // ensure q-word alignment
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return result;
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}
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extern "C" uint32_t
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invoke_copy_to_stack(uint32_t* d, uint32_t paramCount, nsXPTCVariant* s)
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{
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/*
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We need to copy the parameters for this function to locals and use them
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from there since the parameters occupy the same stack space as the stack
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we're trying to populate.
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*/
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uint32_t *l_d = d;
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nsXPTCVariant *l_s = s;
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uint32_t l_paramCount = paramCount;
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uint32_t regCount = 0; // return the number of registers to load from the stack
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typedef struct {
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uint32_t hi;
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uint32_t lo;
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} DU; // have to move 64 bit entities as 32 bit halves since
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// stack slots are not guaranteed 16 byte aligned
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for(uint32_t i = 0; i < l_paramCount; i++, l_d++, l_s++)
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{
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if (regCount < 5) regCount++;
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if(l_s->IsPtrData())
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{
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if(l_s->type == nsXPTType::T_JSVAL)
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{
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// On SPARC, we need to pass a pointer to HandleValue
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*((void**)l_d) = &l_s->ptr;
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} else
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{
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*((void**)l_d) = l_s->ptr;
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}
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continue;
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}
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switch(l_s->type)
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{
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case nsXPTType::T_I8 : *((int32_t*) l_d) = l_s->val.i8; break;
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case nsXPTType::T_I16 : *((int32_t*) l_d) = l_s->val.i16; break;
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case nsXPTType::T_I32 : *((int32_t*) l_d) = l_s->val.i32; break;
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case nsXPTType::T_I64 :
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case nsXPTType::T_U64 :
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case nsXPTType::T_DOUBLE : *((uint32_t*) l_d++) = ((DU *)l_s)->hi;
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if (regCount < 5) regCount++;
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*((uint32_t*) l_d) = ((DU *)l_s)->lo;
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break;
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case nsXPTType::T_U8 : *((uint32_t*) l_d) = l_s->val.u8; break;
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case nsXPTType::T_U16 : *((uint32_t*) l_d) = l_s->val.u16; break;
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case nsXPTType::T_U32 : *((uint32_t*) l_d) = l_s->val.u32; break;
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case nsXPTType::T_FLOAT : *((float*) l_d) = l_s->val.f; break;
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case nsXPTType::T_BOOL : *((uint32_t*) l_d) = l_s->val.b; break;
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case nsXPTType::T_CHAR : *((uint32_t*) l_d) = l_s->val.c; break;
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case nsXPTType::T_WCHAR : *((int32_t*) l_d) = l_s->val.wc; break;
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default:
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// all the others are plain pointer types
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*((void**)l_d) = l_s->val.p;
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break;
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}
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}
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return regCount;
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}
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