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xpcom/reflect/xptcall/src/md/unix/xptcinvoke_ppc_openbsd.cpp@129ffea94266 (annotated)

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

Sat, 03 Jan 2015 20:18:00 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Sat, 03 Jan 2015 20:18:00 +0100

branch

TOR_BUG_3246

changeset 7

129ffea94266

permissions

-rw-r--r--

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.

michael@0	1	/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0	2	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	3	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	4	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	5
michael@0	6	// Platform specific code to invoke XPCOM methods on native objects
michael@0	7
michael@0	8	// The purpose of NS_InvokeByIndex() is to map a platform
michael@0	9	// indepenpent call to the platform ABI. To do that,
michael@0	10	// NS_InvokeByIndex() has to determine the method to call via vtable
michael@0	11	// access. The parameters for the method are read from the
michael@0	12	// nsXPTCVariant* and prepared for th native ABI. For the Linux/PPC
michael@0	13	// ABI this means that the first 8 integral and floating point
michael@0	14	// parameters are passed in registers.
michael@0	15
michael@0	16	#include "xptcprivate.h"
michael@0	17
michael@0	18	// 8 integral parameters are passed in registers
michael@0	19	#define GPR_COUNT 8
michael@0	20
michael@0	21	// 8 floating point parameters are passed in registers, floats are
michael@0	22	// promoted to doubles when passed in registers
michael@0	23	#define FPR_COUNT 8
michael@0	24
michael@0	25	extern "C" uint32_t
michael@0	26	invoke_count_words(uint32_t paramCount, nsXPTCVariant* s)
michael@0	27	{
michael@0	28	return uint32_t(((paramCount * 2) + 3) & ~3);
michael@0	29	}
michael@0	30
michael@0	31	extern "C" void
michael@0	32	invoke_copy_to_stack(uint32_t* d,
michael@0	33	uint32_t paramCount,
michael@0	34	nsXPTCVariant* s,
michael@0	35	uint32_t* gpregs,
michael@0	36	double* fpregs)
michael@0	37	{
michael@0	38	uint32_t gpr = 1; // skip one GP reg for 'that'
michael@0	39	uint32_t fpr = 0;
michael@0	40	uint32_t tempu32;
michael@0	41	uint64_t tempu64;
michael@0	42
michael@0	43	for(uint32_t i = 0; i < paramCount; i++, s++) {
michael@0	44	if(s->IsPtrData()) {
michael@0	45	if(s->type == nsXPTType::T_JSVAL)
michael@0	46	tempu32 = (uint32_t) &(s->ptr);
michael@0	47	else
michael@0	48	tempu32 = (uint32_t) s->ptr;
michael@0	49	} else {
michael@0	50	switch(s->type) {
michael@0	51	case nsXPTType::T_FLOAT: break;
michael@0	52	case nsXPTType::T_DOUBLE: break;
michael@0	53	case nsXPTType::T_I8: tempu32 = s->val.i8; break;
michael@0	54	case nsXPTType::T_I16: tempu32 = s->val.i16; break;
michael@0	55	case nsXPTType::T_I32: tempu32 = s->val.i32; break;
michael@0	56	case nsXPTType::T_I64: tempu64 = s->val.i64; break;
michael@0	57	case nsXPTType::T_U8: tempu32 = s->val.u8; break;
michael@0	58	case nsXPTType::T_U16: tempu32 = s->val.u16; break;
michael@0	59	case nsXPTType::T_U32: tempu32 = s->val.u32; break;
michael@0	60	case nsXPTType::T_U64: tempu64 = s->val.u64; break;
michael@0	61	case nsXPTType::T_BOOL: tempu32 = s->val.b; break;
michael@0	62	case nsXPTType::T_CHAR: tempu32 = s->val.c; break;
michael@0	63	case nsXPTType::T_WCHAR: tempu32 = s->val.wc; break;
michael@0	64	default: tempu32 = (uint32_t) s->val.p; break;
michael@0	65	}
michael@0	66	}
michael@0	67
michael@0	68	if (!s->IsPtrData() && s->type == nsXPTType::T_DOUBLE) {
michael@0	69	if (fpr < FPR_COUNT)
michael@0	70	fpregs[fpr++] = s->val.d;
michael@0	71	else {
michael@0	72	if ((uint32_t) d & 4) d++; // doubles are 8-byte aligned on stack
michael@0	73	*((double*) d) = s->val.d;
michael@0	74	d += 2;
michael@0	75	}
michael@0	76	}
michael@0	77	else if (!s->IsPtrData() && s->type == nsXPTType::T_FLOAT) {
michael@0	78	if (fpr < FPR_COUNT)
michael@0	79	fpregs[fpr++] = s->val.f; // if passed in registers, floats are promoted to doubles
michael@0	80	else
michael@0	81	*((float*) d++) = s->val.f;
michael@0	82	}
michael@0	83	else if (!s->IsPtrData() && (s->type == nsXPTType::T_I64
michael@0	84	|| s->type == nsXPTType::T_U64)) {
michael@0	85	if ((gpr + 1) < GPR_COUNT) {
michael@0	86	if (gpr & 1) gpr++; // longlongs are aligned in odd/even register pairs, eg. r5/r6
michael@0	87	*((uint64_t*) &gpregs[gpr]) = tempu64;
michael@0	88	gpr += 2;
michael@0	89	}
michael@0	90	else {
michael@0	91	if ((uint32_t) d & 4) d++; // longlongs are 8-byte aligned on stack
michael@0	92	*((uint64_t*) d) = tempu64;
michael@0	93	d += 2;
michael@0	94	}
michael@0	95	}
michael@0	96	else {
michael@0	97	if (gpr < GPR_COUNT)
michael@0	98	gpregs[gpr++] = tempu32;
michael@0	99	else
michael@0	100	*d++ = tempu32;
michael@0	101	}
michael@0	102
michael@0	103	}
michael@0	104	}
michael@0	105
michael@0	106	extern "C"
michael@0	107	EXPORT_XPCOM_API(nsresult)
michael@0	108	NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex,
michael@0	109	uint32_t paramCount, nsXPTCVariant* params);