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Diffstat (limited to '')
| -rw-r--r-- | src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/unix/xptcstubs_arm.cpp | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/unix/xptcstubs_arm.cpp b/src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/unix/xptcstubs_arm.cpp new file mode 100644 index 00000000..fc90ecea --- /dev/null +++ b/src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/unix/xptcstubs_arm.cpp @@ -0,0 +1,244 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0/LGPL 2.1 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is mozilla.org code. + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1999 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * Russell King <rmk@arm.linux.org.uk> + * + * Alternatively, the contents of this file may be used under the terms of + * either of the GNU General Public License Version 2 or later (the "GPL"), + * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), + * in which case the provisions of the GPL or the LGPL are applicable instead + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * ***** END LICENSE BLOCK ***** */ + +/* Implement shared vtbl methods. */ + +#include "xptcprivate.h" + +#if !defined(LINUX) || !defined(__arm__) +#error "This code is for Linux ARM only. Please check if it works for you, too.\nDepends strongly on gcc behaviour." +#endif + +/* Specify explicitly a symbol for this function, don't try to guess the c++ mangled symbol. */ +static nsresult PrepareAndDispatch(nsXPTCStubBase* self, uint32 methodIndex, PRUint32* args) asm("_PrepareAndDispatch"); + +static nsresult +PrepareAndDispatch(nsXPTCStubBase* self, uint32 methodIndex, PRUint32* args) +{ +#define PARAM_BUFFER_COUNT 16 + + nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT]; + nsXPTCMiniVariant* dispatchParams = NULL; + nsIInterfaceInfo* iface_info = NULL; + const nsXPTMethodInfo* info; + PRUint8 paramCount; + PRUint8 i; + nsresult result = NS_ERROR_FAILURE; + + NS_ASSERTION(self,"no self"); + + self->GetInterfaceInfo(&iface_info); + NS_ASSERTION(iface_info,"no interface info"); + + iface_info->GetMethodInfo(PRUint16(methodIndex), &info); + NS_ASSERTION(info,"no interface info"); + + paramCount = info->GetParamCount(); + + // setup variant array pointer + if(paramCount > PARAM_BUFFER_COUNT) + dispatchParams = new nsXPTCMiniVariant[paramCount]; + else + dispatchParams = paramBuffer; + NS_ASSERTION(dispatchParams,"no place for params"); + + PRUint32* ap = args; + for(i = 0; i < paramCount; i++, ap++) + { + const nsXPTParamInfo& param = info->GetParam(i); + const nsXPTType& type = param.GetType(); + nsXPTCMiniVariant* dp = &dispatchParams[i]; + + if(param.IsOut() || !type.IsArithmetic()) + { + dp->val.p = (void*) *ap; + continue; + } + // else + switch(type) + { + case nsXPTType::T_I8 : dp->val.i8 = *((PRInt8*) ap); break; + case nsXPTType::T_I16 : dp->val.i16 = *((PRInt16*) ap); break; + case nsXPTType::T_I32 : dp->val.i32 = *((PRInt32*) ap); break; + case nsXPTType::T_I64 : dp->val.i64 = *((PRInt64*) ap); ap++; break; + case nsXPTType::T_U8 : dp->val.u8 = *((PRUint8*) ap); break; + case nsXPTType::T_U16 : dp->val.u16 = *((PRUint16*)ap); break; + case nsXPTType::T_U32 : dp->val.u32 = *((PRUint32*)ap); break; + case nsXPTType::T_U64 : dp->val.u64 = *((PRUint64*)ap); ap++; break; + case nsXPTType::T_FLOAT : dp->val.f = *((float*) ap); break; + case nsXPTType::T_DOUBLE : dp->val.d = *((double*) ap); ap++; break; + case nsXPTType::T_BOOL : dp->val.b = *((PRBool*) ap); break; + case nsXPTType::T_CHAR : dp->val.c = *((char*) ap); break; + case nsXPTType::T_WCHAR : dp->val.wc = *((wchar_t*) ap); break; + default: + NS_ASSERTION(0, "bad type"); + break; + } + } + + result = self->CallMethod((PRUint16)methodIndex, info, dispatchParams); + + NS_RELEASE(iface_info); + + if(dispatchParams != paramBuffer) + delete [] dispatchParams; + + return result; +} + +/* + * This is our shared stub. + * + * r0 = Self. + * + * The Rules: + * We pass an (undefined) number of arguments into this function. + * The first 3 C++ arguments are in r1 - r3, the rest are built + * by the calling function on the stack. + * + * We are allowed to corrupt r0 - r3, ip, and lr. + * + * Other Info: + * We pass the stub number in using `ip'. + * + * Implementation: + * - We save r1 to r3 inclusive onto the stack, which will be + * immediately below the caller saved arguments. + * - setup r2 (PrepareAndDispatch's args pointer) to point at + * the base of all these arguments + * - Save LR (for the return address) + * - Set r1 (PrepareAndDispatch's methodindex argument) from ip + * - r0 is passed through (self) + * - Call PrepareAndDispatch + * - When the call returns, we return by loading the PC off the + * stack, and undoing the stack (one instruction)! + * + */ +__asm__ ("\n\ +SharedStub: \n\ + stmfd sp!, {r1, r2, r3} \n\ + mov r2, sp \n\ + str lr, [sp, #-4]! \n\ + mov r1, ip \n\ + bl _PrepareAndDispatch \n\ + ldr pc, [sp], #16"); + +/* + * Create sets of stubs to call the SharedStub. + * We don't touch the stack here, nor any registers, other than IP. + * IP is defined to be corruptable by a called function, so we are + * safe to use it. + * + * This will work with or without optimisation. + */ +#if defined(__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100 /* G++ V3 ABI */ +/* + * Note : As G++3 ABI contains the length of the functionname in the + * mangled name, it is difficult to get a generic assembler mechanism like + * in the G++ 2.95 case. + * Create names would be like : + * _ZN14nsXPTCStubBase5Stub9Ev + * _ZN14nsXPTCStubBase6Stub13Ev + * _ZN14nsXPTCStubBase7Stub144Ev + * Use the assembler directives to get the names right... + */ + +#define STUB_ENTRY(n) \ + __asm__( \ + ".section \".text\"\n" \ +" .align 2\n" \ +" .iflt ("#n" - 10)\n" \ +" .globl _ZN14nsXPTCStubBase5Stub"#n"Ev\n" \ +" .type _ZN14nsXPTCStubBase5Stub"#n"Ev,#function\n" \ +"_ZN14nsXPTCStubBase5Stub"#n"Ev:\n" \ +" .else\n" \ +" .iflt ("#n" - 100)\n" \ +" .globl _ZN14nsXPTCStubBase6Stub"#n"Ev\n" \ +" .type _ZN14nsXPTCStubBase6Stub"#n"Ev,#function\n" \ +"_ZN14nsXPTCStubBase6Stub"#n"Ev:\n" \ +" .else\n" \ +" .iflt ("#n" - 1000)\n" \ +" .globl _ZN14nsXPTCStubBase7Stub"#n"Ev\n" \ +" .type _ZN14nsXPTCStubBase7Stub"#n"Ev,#function\n" \ +"_ZN14nsXPTCStubBase7Stub"#n"Ev:\n" \ +" .else\n" \ +" .err \"stub number "#n"> 1000 not yet supported\"\n" \ +" .endif\n" \ +" .endif\n" \ +" .endif\n" \ +" mov ip, #"#n"\n" \ +" b SharedStub\n\t"); + +#if 0 +/* + * This part is left in as comment : this is how the method definition + * should look like. + */ + +#define STUB_ENTRY(n) \ +nsresult nsXPTCStubBase::Stub##n () \ +{ \ + __asm__ ( \ +" mov ip, #"#n"\n" \ +" b SharedStub\n\t"); \ + return 0; /* avoid warnings */ \ +} +#endif + +#else /* G++2.95 ABI */ + +#define STUB_ENTRY(n) \ + __asm__( \ + ".section \".text\"\n" \ +" .align\n" \ +" .globl Stub"#n"__14nsXPTCStubBase\n" \ +" .type Stub"#n"__14nsXPTCStubBase,#function\n\n" \ +"Stub"#n"__14nsXPTCStubBase:\n" \ +" mov ip, #"#n"\n" \ +" b SharedStub\n\t"); + +#endif + +#define SENTINEL_ENTRY(n) \ +nsresult nsXPTCStubBase::Sentinel##n() \ +{ \ + NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \ + return NS_ERROR_NOT_IMPLEMENTED; \ +} + +#include "xptcstubsdef.inc" |