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-rw-r--r--xpcom/reflect/xptcall/md/unix/xptcstubs_ppc_rhapsody.cpp165
1 files changed, 165 insertions, 0 deletions
diff --git a/xpcom/reflect/xptcall/md/unix/xptcstubs_ppc_rhapsody.cpp b/xpcom/reflect/xptcall/md/unix/xptcstubs_ppc_rhapsody.cpp
new file mode 100644
index 000000000..4c485a275
--- /dev/null
+++ b/xpcom/reflect/xptcall/md/unix/xptcstubs_ppc_rhapsody.cpp
@@ -0,0 +1,165 @@
+/* -*- Mode: C -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xptcprivate.h"
+#include "xptiprivate.h"
+
+/* Under the Mac OS X PowerPC ABI, the first 8 integer and 13 floating point
+ * parameters are delivered in registers and are not on the stack, although
+ * stack space is allocated for them. The integer parameters are delivered
+ * in GPRs r3 through r10. The first 8 words of the parameter area on the
+ * stack shadow these registers. A word will either be in a register or on
+ * the stack, but not in both. Although the first floating point parameters
+ * are passed in floating point registers, GPR space and stack space is
+ * reserved for them as well.
+ *
+ * SharedStub has passed pointers to the parameter section of the stack
+ * and saved copies of the GPRs and FPRs used for parameter passing. We
+ * don't care about the first parameter (which is delivered here as the self
+ * pointer), so SharedStub pointed us past that. argsGPR thus points to GPR
+ * r4 (corresponding to the first argument after the self pointer) and
+ * argsStack points to the parameter section of the caller's stack frame
+ * reserved for the same argument. This way, it is possible to reference
+ * either argsGPR or argsStack with the same index.
+ *
+ * Contrary to the assumption made by the previous implementation, the
+ * Mac OS X PowerPC ABI doesn't impose any special alignment restrictions on
+ * parameter sections of stacks. Values that are 64 bits wide appear on the
+ * stack without any special padding.
+ *
+ * See also xptcstubs_asm_ppc_darwin.s.m4:_SharedStub.
+ *
+ * ABI reference:
+ * http://developer.apple.com/documentation/DeveloperTools/Conceptual/
+ * MachORuntime/PowerPCConventions/chapter_3_section_1.html */
+
+extern "C" nsresult ATTRIBUTE_USED
+PrepareAndDispatch(
+ nsXPTCStubBase *self,
+ uint32_t methodIndex,
+ uint32_t *argsStack,
+ uint32_t *argsGPR,
+ double *argsFPR) {
+#define PARAM_BUFFER_COUNT 16
+#define PARAM_FPR_COUNT 13
+#define PARAM_GPR_COUNT 7
+
+ nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
+ nsXPTCMiniVariant *dispatchParams = nullptr;
+ const nsXPTMethodInfo *methodInfo;
+ uint8_t paramCount;
+ uint8_t i;
+ nsresult result = NS_ERROR_FAILURE;
+ uint32_t argIndex = 0;
+ uint32_t fprIndex = 0;
+
+ typedef struct {
+ uint32_t hi;
+ uint32_t lo;
+ } DU;
+
+ NS_ASSERTION(self, "no self");
+
+ self->mEntry->GetMethodInfo(uint16_t(methodIndex), &methodInfo);
+ NS_ASSERTION(methodInfo, "no method info");
+
+ paramCount = methodInfo->GetParamCount();
+
+ if(paramCount > PARAM_BUFFER_COUNT) {
+ dispatchParams = new nsXPTCMiniVariant[paramCount];
+ }
+ else {
+ dispatchParams = paramBuffer;
+ }
+ NS_ASSERTION(dispatchParams,"no place for params");
+
+ for(i = 0; i < paramCount; i++, argIndex++) {
+ const nsXPTParamInfo &param = methodInfo->GetParam(i);
+ const nsXPTType &type = param.GetType();
+ nsXPTCMiniVariant *dp = &dispatchParams[i];
+ uint32_t theParam;
+
+ if(argIndex < PARAM_GPR_COUNT)
+ theParam = argsGPR[argIndex];
+ else
+ theParam = argsStack[argIndex];
+
+ if(param.IsOut() || !type.IsArithmetic())
+ dp->val.p = (void *) theParam;
+ else {
+ switch(type) {
+ case nsXPTType::T_I8:
+ dp->val.i8 = (int8_t) theParam;
+ break;
+ case nsXPTType::T_I16:
+ dp->val.i16 = (int16_t) theParam;
+ break;
+ case nsXPTType::T_I32:
+ dp->val.i32 = (int32_t) theParam;
+ break;
+ case nsXPTType::T_U8:
+ dp->val.u8 = (uint8_t) theParam;
+ break;
+ case nsXPTType::T_U16:
+ dp->val.u16 = (uint16_t) theParam;
+ break;
+ case nsXPTType::T_U32:
+ dp->val.u32 = (uint32_t) theParam;
+ break;
+ case nsXPTType::T_I64:
+ case nsXPTType::T_U64:
+ ((DU *)dp)->hi = (uint32_t) theParam;
+ if(++argIndex < PARAM_GPR_COUNT)
+ ((DU *)dp)->lo = (uint32_t) argsGPR[argIndex];
+ else
+ ((DU *)dp)->lo = (uint32_t) argsStack[argIndex];
+ break;
+ case nsXPTType::T_BOOL:
+ dp->val.b = (bool) theParam;
+ break;
+ case nsXPTType::T_CHAR:
+ dp->val.c = (char) theParam;
+ break;
+ case nsXPTType::T_WCHAR:
+ dp->val.wc = (wchar_t) theParam;
+ break;
+ case nsXPTType::T_FLOAT:
+ if(fprIndex < PARAM_FPR_COUNT)
+ dp->val.f = (float) argsFPR[fprIndex++];
+ else
+ dp->val.f = *(float *) &argsStack[argIndex];
+ break;
+ case nsXPTType::T_DOUBLE:
+ if(fprIndex < PARAM_FPR_COUNT)
+ dp->val.d = argsFPR[fprIndex++];
+ else
+ dp->val.d = *(double *) &argsStack[argIndex];
+ argIndex++;
+ break;
+ default:
+ NS_ERROR("bad type");
+ break;
+ }
+ }
+ }
+
+ result = self->mOuter->
+ CallMethod((uint16_t)methodIndex, methodInfo, dispatchParams);
+
+ if(dispatchParams != paramBuffer)
+ delete [] dispatchParams;
+
+ return result;
+}
+
+#define STUB_ENTRY(n)
+#define SENTINEL_ENTRY(n) \
+nsresult nsXPTCStubBase::Sentinel##n() \
+{ \
+ NS_ERROR("nsXPTCStubBase::Sentinel called"); \
+ return NS_ERROR_NOT_IMPLEMENTED; \
+}
+
+#include "xptcstubsdef.inc"