diff options
Diffstat (limited to 'src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_arm64_vbox.cpp')
| -rw-r--r-- | src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_arm64_vbox.cpp | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_arm64_vbox.cpp b/src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_arm64_vbox.cpp new file mode 100644 index 00000000..6611f667 --- /dev/null +++ b/src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_arm64_vbox.cpp @@ -0,0 +1,296 @@ +/* $Id: xptcinvoke_arm64_vbox.cpp $ */ +/** @file + * XPCOM - Implementation XPTC_InvokeByIndex for arm64. + */ + +/* + * Copyright (C) 2021-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * SPDX-License-Identifier: GPL-3.0-only + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include "xptcprivate.h" +#include <iprt/cdefs.h> +#include <iprt/alloca.h> +#include <iprt/assert.h> + + +/********************************************************************************************************************************* +* Defined Constants And Macros * +*********************************************************************************************************************************/ +#define NUM_ARGS_IN_GPRS 8 /**< Number of arguments passed in general purpose registers (starting with x0). */ +#define NUM_ARGS_IN_FPRS 8 /**< Number of arguments passed in floating point registers (starting with d0). */ + +#define MY_MAX_ARGS 64 /**< Limit ourselves to 64 arguments. */ + + + +AssertCompileMemberOffset(nsXPTCVariant, val, 0); + +extern "C" __attribute__((naked)) nsresult +arm64AsmInvoker(uintptr_t pfnMethod /*x0*/, uint32_t cParams /*w1*/, nsXPTCVariant *paParams /*x2*/, uint64_t cbStack /*x3*/, + uint8_t *acbStackArgs /*x4*/, uint64_t *pauGprArgs /*x5*/, uint64_t *pauFprArgs /*x6*/, uint32_t cFprArgs /*x7*/) +{ + __asm__ __volatile__( + /* Prologue - create the frame. */ "\ + sub sp, sp, 16 \n\ + stp x29, x30, [sp] \n\ + mov x29, sp \n\ + .cfi_def_cfa x29, 16 \n\ + .cfi_rel_offset x30, -8 \n\ + .cfi_rel_offset x29, -16 \n\ +\n\ +" /* Move pfnMethod to x16 and pauGprArgs to x7 free up x0 and x5: */ "\ + mov x16, x0 \n\ + mov x17, x5 \n\ +\n\ +" /* Load FPU registers first so we free up x6 & x7 early: */ "\ + cmp w7, #0 \n\ + b.eq Lno_fprs\n\ + ldp d0, d1, [x6] \n\ + ldp d2, d3, [x6, #16] \n\ + ldp d4, d5, [x6, #32] \n\ + ldp d6, d7, [x6, #48] \n\ +Lno_fprs:\n\ +\n\ +" /* Do argument passing by stack (if any). We align the stack to 16 bytes. */ "\ + cmp x3, #0 \n\ + beq Lno_stack_args \n\ + sub x3, sp, x3 \n\ + bic x3, x3, #15 \n\ + mov sp, x3 \n\ +Lnext_parameter: \n\ + ldrb w7, [x4] \n\ + cmp w7, #0 \n\ + beq Ladvance\n\ +\n\ + cmp w7, #4 \n\ + bgt Lstore_64bits\n\ + cmp w7, #1 \n\ + beq Lstore_8bits\n\ + cmp w7, #2 \n\ + beq Lstore_16bits\n\ +\n\ +Lstore_32bits:\n\ + ldr w0, [x2] \n\ + add x3, x3, #3 \n\ + bic x3, x3, #3 \n\ + str w0, [x3] \n" +#ifdef RT_OS_DARWIN /* macOS compacts stack usage. */ +" add x3, x3, #4 \n" +#endif +" b Ladvance \n\ +\n\ +Lstore_8bits:\n\ + ldrb w0, [x2] \n\ + strb w0, [x3] \n" +#ifdef RT_OS_DARWIN /* macOS compacts stack usage. */ +" add x3, x3, #1 \n" +#endif +" b Ladvance \n\ +\n\ +Lstore_16bits:\n\ + ldrh w0, [x2] \n\ + add x3, x3, #1 \n\ + bic x3, x3, #1 \n\ + strh w0, [x3] \n" +#ifdef RT_OS_DARWIN /* macOS compacts stack usage. */ +" add x3, x3, #2 \n" +#endif +" b Ladvance \n\ +\n\ +Lstore_64bits_ptr:\n\ + ldr x0, [x2, %[offPtrInXPTCVariant]] \n\ + b Lstore_64bits_common \n\ +Lstore_64bits:\n\ + tst w7, #0x80 \n\ + bne Lstore_64bits_ptr \n\ + ldr x0, [x2] \n\ +Lstore_64bits_common:\n\ + add x3, x3, #7 \n\ + bic x3, x3, #7 \n\ + str x0, [x3] \n" +#ifdef RT_OS_DARWIN /* macOS compacts stack usage. */ +" add x3, x3, #8 \n" +#endif +"\n\ +Ladvance:\n" +#ifndef RT_OS_DARWIN /* macOS compacts stack usage. */ +" add x3, x3, #8 \n" +#endif +" add x4, x4, #1 \n\ + add x2, x2, %[cbXPTCVariant] \n\ + sub w1, w1, #1 \n\ + cmp w1, #0 \n\ + bne Lnext_parameter \n\ +\n\ +" /* reserve stack space for the integer and floating point registers and save them: */ "\ +Lno_stack_args: \n\ +\n\ +" /* Load general purpose argument registers: */ "\ + ldp x0, x1, [x17] \n\ + ldp x2, x3, [x17, #16] \n\ + ldp x4, x5, [x17, #32] \n\ + ldp x6, x7, [x17, #48] \n\ +\n\ +" /* Make the call: */ "\ + blr x16 \n\ +\n\ +" /* Epilogue (clang does not emit the .cfi's here, so drop them too?): */ "\ + mov sp, x29 \n\ + ldp x29, x30, [sp] \n\ + add sp, sp, #16 \n\ + .cfi_def_cfa sp, 0 \n\ + .cfi_restore x29 \n\ + .cfi_restore x30 \n\ + ret \n\ +" : + : [cbXPTCVariant] "i" (sizeof(nsXPTCVariant)) + , [offPtrInXPTCVariant] "i" (offsetof(nsXPTCVariant, ptr)) + :); +} + + +XPTC_PUBLIC_API(nsresult) +XPTC_InvokeByIndex(nsISupports *pThis, PRUint32 idxMethod, PRUint32 cParams, nsXPTCVariant *paParams) +{ + AssertMsgReturn(cParams <= MY_MAX_ARGS, ("cParams=%#x idxMethod=%#x\n", cParams, idxMethod), NS_ERROR_UNEXPECTED); + + /* + * Prepare + */ + uint64_t auGprArgs[NUM_ARGS_IN_GPRS] = {0}; + uint64_t auFprArgs[NUM_ARGS_IN_GPRS] = {0}; + uint8_t acbStackArgs[MY_MAX_ARGS]; /* The number of value bytes to copy onto the stack. Zero if in register. */ + uint32_t cbStackArgs = 0; + uint32_t cFprArgs = 0; + uint32_t cGprArgs = 0; + + /* First argument is always 'pThis'. The 'pThis' argument is not accounted + for in cParams or acbStackArgs. */ + auGprArgs[cGprArgs++] = (uintptr_t)pThis; + + /* Do the other arguments. */ + for (PRUint32 i = 0; i < cParams; i++) + { + if (paParams[i].IsPtrData()) + { + if (cGprArgs < NUM_ARGS_IN_GPRS) + { + auGprArgs[cGprArgs++] = (uintptr_t)paParams[i].ptr; + acbStackArgs[i] = 0; + } + else + { + acbStackArgs[i] = sizeof(paParams[i].ptr) | UINT8_C(0x80); +#ifdef RT_OS_DARWIN /* macOS compacts stack usage. */ + cbStackArgs = RT_ALIGN_32(cbStackArgs, sizeof(paParams[i].ptr)) + sizeof(paParams[i].ptr); +#else + cbStackArgs += sizeof(uint64_t); +#endif + } + } + else + { + if ( paParams[i].type != nsXPTType::T_FLOAT + && paParams[i].type != nsXPTType::T_DOUBLE) + { + if (cGprArgs < NUM_ARGS_IN_GPRS) + { + switch (paParams[i].type) + { + case nsXPTType::T_I8: auGprArgs[cGprArgs++] = paParams[i].val.i8; break; + case nsXPTType::T_I16: auGprArgs[cGprArgs++] = paParams[i].val.i16; break; + case nsXPTType::T_I32: auGprArgs[cGprArgs++] = paParams[i].val.i32; break; + case nsXPTType::T_I64: auGprArgs[cGprArgs++] = paParams[i].val.i64; break; + case nsXPTType::T_U8: auGprArgs[cGprArgs++] = paParams[i].val.u8; break; + case nsXPTType::T_U16: auGprArgs[cGprArgs++] = paParams[i].val.u16; break; + case nsXPTType::T_U32: auGprArgs[cGprArgs++] = paParams[i].val.u32; break; + default: + case nsXPTType::T_U64: auGprArgs[cGprArgs++] = paParams[i].val.u64; break; + case nsXPTType::T_BOOL: auGprArgs[cGprArgs++] = paParams[i].val.b; break; + case nsXPTType::T_CHAR: auGprArgs[cGprArgs++] = paParams[i].val.c; break; + case nsXPTType::T_WCHAR: auGprArgs[cGprArgs++] = paParams[i].val.wc; break; + } + acbStackArgs[i] = 0; + } + else + { + uint8_t cbStack; + switch (paParams[i].type) + { + case nsXPTType::T_I8: cbStack = sizeof(paParams[i].val.i8); break; + case nsXPTType::T_I16: cbStack = sizeof(paParams[i].val.i16); break; + case nsXPTType::T_I32: cbStack = sizeof(paParams[i].val.i32); break; + case nsXPTType::T_I64: cbStack = sizeof(paParams[i].val.i64); break; + case nsXPTType::T_U8: cbStack = sizeof(paParams[i].val.u8); break; + case nsXPTType::T_U16: cbStack = sizeof(paParams[i].val.u16); break; + case nsXPTType::T_U32: cbStack = sizeof(paParams[i].val.u32); break; + default: + case nsXPTType::T_U64: cbStack = sizeof(paParams[i].val.u64); break; + case nsXPTType::T_BOOL: cbStack = sizeof(paParams[i].val.b); break; + case nsXPTType::T_CHAR: cbStack = sizeof(paParams[i].val.c); break; + case nsXPTType::T_WCHAR: cbStack = sizeof(paParams[i].val.wc); break; + } + acbStackArgs[i] = cbStack; +#ifdef RT_OS_DARWIN /* macOS compacts stack usage. */ + cbStackArgs = RT_ALIGN_32(cbStackArgs, cbStack) + cbStack; +#else + cbStackArgs += sizeof(uint64_t); +#endif + } + } + else if (cFprArgs < NUM_ARGS_IN_FPRS) + { + AssertCompile(sizeof(paParams[i].val.f) == 4); + AssertCompile(sizeof(paParams[i].val.d) == 8); + if (paParams[i].type == nsXPTType::T_FLOAT) + auFprArgs[cFprArgs++] = paParams[i].val.u32; + else + auFprArgs[cFprArgs++] = paParams[i].val.u64; + acbStackArgs[i] = 0; + } + else + { + uint8_t cbStack; + if (paParams[i].type == nsXPTType::T_FLOAT) + cbStack = sizeof(paParams[i].val.f); + else + cbStack = sizeof(paParams[i].val.d); + acbStackArgs[i] = cbStack; +#ifdef RT_OS_DARWIN /* macOS compacts stack usage. */ + cbStackArgs = RT_ALIGN_32(cbStackArgs, cbStack) + cbStack; +#else + cbStackArgs += sizeof(uint64_t); +#endif + } + } + } + + /* + * Pass it on to a naked wrapper function that does the nitty gritty work. + */ + uintptr_t *pauVtable = *(uintptr_t **)pThis; + return arm64AsmInvoker(pauVtable[idxMethod], cParams, paParams, cbStackArgs, acbStackArgs, auGprArgs, auFprArgs, cFprArgs); +} + |