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-rw-r--r--xpcom/reflect/xptcall/md/unix/xptcstubs_aarch64.cpp238
1 files changed, 238 insertions, 0 deletions
diff --git a/xpcom/reflect/xptcall/md/unix/xptcstubs_aarch64.cpp b/xpcom/reflect/xptcall/md/unix/xptcstubs_aarch64.cpp
new file mode 100644
index 0000000000..d535557259
--- /dev/null
+++ b/xpcom/reflect/xptcall/md/unix/xptcstubs_aarch64.cpp
@@ -0,0 +1,238 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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"
+
+#ifndef __AARCH64EL__
+#error "Only little endian compatibility was tested"
+#endif
+
+template<typename T> void
+get_value_and_advance(T* aOutValue, void*& aStack) {
+#ifdef __APPLE__
+ const size_t aligned_size = sizeof(T);
+#else
+ const size_t aligned_size = 8;
+#endif
+ // Ensure the pointer is aligned for the type
+ uintptr_t addr = (reinterpret_cast<uintptr_t>(aStack) + aligned_size - 1) & ~(aligned_size - 1);
+ memcpy(aOutValue, reinterpret_cast<void*>(addr), sizeof(T));
+ aStack = reinterpret_cast<void*>(addr + aligned_size);
+}
+
+/*
+ * This is for AArch64 ABI
+ *
+ * When we're called, the "gp" registers are stored in gprData and
+ * the "fp" registers are stored in fprData. Each array has 8 regs
+ * but first reg in gprData is a placeholder for 'self'.
+ */
+extern "C" nsresult ATTRIBUTE_USED
+PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, void* args,
+ uint64_t *gprData, double *fprData)
+{
+#define PARAM_GPR_COUNT 8
+#define PARAM_FPR_COUNT 8
+
+ nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
+ const nsXPTMethodInfo* info;
+
+ NS_ASSERTION(self,"no self");
+
+ self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info);
+ NS_ASSERTION(info,"no method info");
+
+ uint32_t paramCount = info->GetParamCount();
+
+ const uint8_t indexOfJSContext = info->IndexOfJSContext();
+
+ void* ap = args;
+ uint32_t next_gpr = 1; // skip first arg which is 'self'
+ uint32_t next_fpr = 0;
+ for (uint32_t i = 0; i < paramCount; i++) {
+ const nsXPTParamInfo& param = info->GetParam(i);
+ const nsXPTType& type = param.GetType();
+ nsXPTCMiniVariant* dp = &paramBuffer[i];
+
+ if (i == indexOfJSContext) {
+ if (next_gpr < PARAM_GPR_COUNT)
+ next_gpr++;
+ else {
+ void* value;
+ get_value_and_advance(&value, ap);
+ }
+ }
+
+ if (param.IsOut() || !type.IsArithmetic()) {
+ if (next_gpr < PARAM_GPR_COUNT) {
+ dp->val.p = (void*)gprData[next_gpr++];
+ } else {
+ get_value_and_advance(&dp->val.p, ap);
+ }
+ continue;
+ }
+
+ switch (type) {
+ case nsXPTType::T_I8:
+ if (next_gpr < PARAM_GPR_COUNT) {
+ dp->val.i8 = (int8_t)gprData[next_gpr++];
+ } else {
+ get_value_and_advance(&dp->val.i8, ap);
+ }
+ break;
+
+ case nsXPTType::T_I16:
+ if (next_gpr < PARAM_GPR_COUNT) {
+ dp->val.i16 = (int16_t)gprData[next_gpr++];
+ } else {
+ get_value_and_advance(&dp->val.i16, ap);
+ }
+ break;
+
+ case nsXPTType::T_I32:
+ if (next_gpr < PARAM_GPR_COUNT) {
+ dp->val.i32 = (int32_t)gprData[next_gpr++];
+ } else {
+ get_value_and_advance(&dp->val.i32, ap);
+ }
+ break;
+
+ case nsXPTType::T_I64:
+ if (next_gpr < PARAM_GPR_COUNT) {
+ dp->val.i64 = (int64_t)gprData[next_gpr++];
+ } else {
+ get_value_and_advance(&dp->val.i64, ap);
+ }
+ break;
+
+ case nsXPTType::T_U8:
+ if (next_gpr < PARAM_GPR_COUNT) {
+ dp->val.u8 = (uint8_t)gprData[next_gpr++];
+ } else {
+ get_value_and_advance(&dp->val.u8, ap);
+ }
+ break;
+
+ case nsXPTType::T_U16:
+ if (next_gpr < PARAM_GPR_COUNT) {
+ dp->val.u16 = (uint16_t)gprData[next_gpr++];
+ } else {
+ get_value_and_advance(&dp->val.u16, ap);
+ }
+ break;
+
+ case nsXPTType::T_U32:
+ if (next_gpr < PARAM_GPR_COUNT) {
+ dp->val.u32 = (uint32_t)gprData[next_gpr++];
+ } else {
+ get_value_and_advance(&dp->val.u32, ap);
+ }
+ break;
+
+ case nsXPTType::T_U64:
+ if (next_gpr < PARAM_GPR_COUNT) {
+ dp->val.u64 = (uint64_t)gprData[next_gpr++];
+ } else {
+ get_value_and_advance(&dp->val.u64, ap);
+ }
+ break;
+
+ case nsXPTType::T_FLOAT:
+ if (next_fpr < PARAM_FPR_COUNT) {
+ memcpy(&dp->val.f, &fprData[next_fpr++], sizeof(dp->val.f));
+ } else {
+ get_value_and_advance(&dp->val.f, ap);
+ }
+ break;
+
+ case nsXPTType::T_DOUBLE:
+ if (next_fpr < PARAM_FPR_COUNT) {
+ memcpy(&dp->val.d, &fprData[next_fpr++], sizeof(dp->val.d));
+ } else {
+ get_value_and_advance(&dp->val.d, ap);
+ }
+ break;
+
+ case nsXPTType::T_BOOL:
+ if (next_gpr < PARAM_GPR_COUNT) {
+ dp->val.b = (bool)(uint8_t)gprData[next_gpr++];
+ } else {
+ uint8_t value;
+ get_value_and_advance(&value, ap);
+ dp->val.b = (bool)value;
+ }
+ break;
+
+ case nsXPTType::T_CHAR:
+ if (next_gpr < PARAM_GPR_COUNT) {
+ dp->val.c = (char)gprData[next_gpr++];
+ } else {
+ get_value_and_advance(&dp->val.c, ap);
+ }
+ break;
+
+ case nsXPTType::T_WCHAR:
+ if (next_gpr < PARAM_GPR_COUNT) {
+ dp->val.wc = (wchar_t)gprData[next_gpr++];
+ } else {
+ get_value_and_advance(&dp->val.wc, ap);
+ }
+ break;
+
+ default:
+ NS_ASSERTION(0, "bad type");
+ break;
+ }
+ }
+
+ nsresult result = self->mOuter->CallMethod((uint16_t)methodIndex, info,
+ paramBuffer);
+
+ return result;
+}
+
+#ifdef __APPLE__
+#define GNU(str)
+#define UNDERSCORE "__"
+#else
+#define GNU(str) str
+#define UNDERSCORE "_"
+#endif
+
+// Load w17 with the constant 'n' and branch to SharedStub().
+# define STUB_ENTRY(n) \
+ __asm__ ( \
+ ".text\n\t" \
+ ".align 2\n\t" \
+ ".if "#n" < 10 \n\t" \
+ ".globl " UNDERSCORE "ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
+ GNU(".hidden _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t") \
+ GNU(".type _ZN14nsXPTCStubBase5Stub"#n"Ev,@function \n\n")\
+ "" UNDERSCORE "ZN14nsXPTCStubBase5Stub"#n"Ev: \n\t" \
+ ".elseif "#n" < 100 \n\t" \
+ ".globl " UNDERSCORE "ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
+ GNU(".hidden _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t") \
+ GNU(".type _ZN14nsXPTCStubBase6Stub"#n"Ev,@function \n\n")\
+ "" UNDERSCORE "ZN14nsXPTCStubBase6Stub"#n"Ev: \n\t" \
+ ".elseif "#n" < 1000 \n\t" \
+ ".globl " UNDERSCORE "ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
+ GNU(".hidden _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t") \
+ GNU(".type _ZN14nsXPTCStubBase7Stub"#n"Ev,@function \n\n")\
+ UNDERSCORE "ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \
+ ".else \n\t" \
+ ".err \"stub number "#n" >= 1000 not yet supported\"\n" \
+ ".endif \n\t" \
+ "mov w17,#"#n" \n\t" \
+ "b SharedStub \n" \
+);
+
+#define SENTINEL_ENTRY(n) \
+ nsresult nsXPTCStubBase::Sentinel##n() \
+{ \
+ NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \
+ return NS_ERROR_NOT_IMPLEMENTED; \
+}
+
+#include "xptcstubsdef.inc"
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