diff options
Diffstat (limited to '')
-rw-r--r-- | xpcom/reflect/xptcall/md/unix/xptcstubs_aarch64.cpp | 238 |
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 = ¶mBuffer[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" |