// Copyright 2015 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "src/assembler.h" #include "src/macro-assembler.h" #include "src/compiler/linkage.h" #include "src/zone.h" namespace v8 { namespace internal { namespace compiler { namespace { LinkageLocation regloc(Register reg) { return LinkageLocation::ForRegister(reg.code()); } // Platform-specific configuration for C calling convention. #if V8_TARGET_ARCH_IA32 // =========================================================================== // == ia32 =================================================================== // =========================================================================== #define CALLEE_SAVE_REGISTERS esi.bit() | edi.bit() | ebx.bit() #elif V8_TARGET_ARCH_X64 // =========================================================================== // == x64 ==================================================================== // =========================================================================== #ifdef _WIN64 // == x64 windows ============================================================ #define STACK_SHADOW_WORDS 4 #define PARAM_REGISTERS rcx, rdx, r8, r9 #define CALLEE_SAVE_REGISTERS \ rbx.bit() | rdi.bit() | rsi.bit() | r12.bit() | r13.bit() | r14.bit() | \ r15.bit() #define CALLEE_SAVE_FP_REGISTERS \ (1 << xmm6.code()) | (1 << xmm7.code()) | (1 << xmm8.code()) | \ (1 << xmm9.code()) | (1 << xmm10.code()) | (1 << xmm11.code()) | \ (1 << xmm12.code()) | (1 << xmm13.code()) | (1 << xmm14.code()) | \ (1 << xmm15.code()) #else // == x64 other ============================================================== #define PARAM_REGISTERS rdi, rsi, rdx, rcx, r8, r9 #define CALLEE_SAVE_REGISTERS \ rbx.bit() | r12.bit() | r13.bit() | r14.bit() | r15.bit() #endif #elif V8_TARGET_ARCH_X87 // =========================================================================== // == x87 ==================================================================== // =========================================================================== #define CALLEE_SAVE_REGISTERS esi.bit() | edi.bit() | ebx.bit() #elif V8_TARGET_ARCH_ARM // =========================================================================== // == arm ==================================================================== // =========================================================================== #define PARAM_REGISTERS r0, r1, r2, r3 #define CALLEE_SAVE_REGISTERS \ r4.bit() | r5.bit() | r6.bit() | r7.bit() | r8.bit() | r9.bit() | r10.bit() #define CALLEE_SAVE_FP_REGISTERS \ (1 << d8.code()) | (1 << d9.code()) | (1 << d10.code()) | \ (1 << d11.code()) | (1 << d12.code()) | (1 << d13.code()) | \ (1 << d14.code()) | (1 << d15.code()) #elif V8_TARGET_ARCH_ARM64 // =========================================================================== // == arm64 ==================================================================== // =========================================================================== #define PARAM_REGISTERS x0, x1, x2, x3, x4, x5, x6, x7 #define CALLEE_SAVE_REGISTERS \ (1 << x19.code()) | (1 << x20.code()) | (1 << x21.code()) | \ (1 << x22.code()) | (1 << x23.code()) | (1 << x24.code()) | \ (1 << x25.code()) | (1 << x26.code()) | (1 << x27.code()) | \ (1 << x28.code()) | (1 << x29.code()) | (1 << x30.code()) #define CALLEE_SAVE_FP_REGISTERS \ (1 << d8.code()) | (1 << d9.code()) | (1 << d10.code()) | \ (1 << d11.code()) | (1 << d12.code()) | (1 << d13.code()) | \ (1 << d14.code()) | (1 << d15.code()) #elif V8_TARGET_ARCH_MIPS // =========================================================================== // == mips =================================================================== // =========================================================================== #define PARAM_REGISTERS a0, a1, a2, a3 #define CALLEE_SAVE_REGISTERS \ s0.bit() | s1.bit() | s2.bit() | s3.bit() | s4.bit() | s5.bit() | s6.bit() | \ s7.bit() #define CALLEE_SAVE_FP_REGISTERS \ f20.bit() | f22.bit() | f24.bit() | f26.bit() | f28.bit() | f30.bit() #elif V8_TARGET_ARCH_MIPS64 // =========================================================================== // == mips64 ================================================================= // =========================================================================== #define PARAM_REGISTERS a0, a1, a2, a3, a4, a5, a6, a7 #define CALLEE_SAVE_REGISTERS \ s0.bit() | s1.bit() | s2.bit() | s3.bit() | s4.bit() | s5.bit() | s6.bit() | \ s7.bit() #define CALLEE_SAVE_FP_REGISTERS \ f20.bit() | f22.bit() | f24.bit() | f26.bit() | f28.bit() | f30.bit() #elif V8_TARGET_ARCH_PPC || V8_TARGET_ARCH_PPC64 // =========================================================================== // == ppc & ppc64 ============================================================ // =========================================================================== #define PARAM_REGISTERS r3, r4, r5, r6, r7, r8, r9, r10 #define CALLEE_SAVE_REGISTERS \ r14.bit() | r15.bit() | r16.bit() | r17.bit() | r18.bit() | r19.bit() | \ r20.bit() | r21.bit() | r22.bit() | r23.bit() | r24.bit() | r25.bit() | \ r26.bit() | r27.bit() | r28.bit() | r29.bit() | r30.bit() #define CALLEE_SAVE_FP_REGISTERS \ d14.bit() | d15.bit() | d16.bit() | d17.bit() | d18.bit() | d19.bit() | \ d20.bit() | d21.bit() | d22.bit() | d23.bit() | d24.bit() | d25.bit() | \ d26.bit() | d27.bit() | d28.bit() | d29.bit() | d30.bit() | d31.bit() #else // =========================================================================== // == unknown ================================================================ // =========================================================================== #define UNSUPPORTED_C_LINKAGE 1 #endif } // namespace // General code uses the above configuration data. CallDescriptor* Linkage::GetSimplifiedCDescriptor( Zone* zone, const MachineSignature* msig) { LocationSignature::Builder locations(zone, msig->return_count(), msig->parameter_count()); #if 0 // TODO(titzer): instruction selector tests break here. // Check the types of the signature. // Currently no floating point parameters or returns are allowed because // on x87 and ia32, the FP top of stack is involved. for (size_t i = 0; i < msig->return_count(); i++) { MachineType type = RepresentationOf(msig->GetReturn(i)); CHECK(type != kRepFloat32 && type != kRepFloat64); } for (size_t i = 0; i < msig->parameter_count(); i++) { MachineType type = RepresentationOf(msig->GetParam(i)); CHECK(type != kRepFloat32 && type != kRepFloat64); } #endif #ifdef UNSUPPORTED_C_LINKAGE // This method should not be called on unknown architectures. V8_Fatal(__FILE__, __LINE__, "requested C call descriptor on unsupported architecture"); return nullptr; #endif // Add return location(s). CHECK(locations.return_count_ <= 2); if (locations.return_count_ > 0) { locations.AddReturn(regloc(kReturnRegister0)); } if (locations.return_count_ > 1) { locations.AddReturn(regloc(kReturnRegister1)); } const int parameter_count = static_cast(msig->parameter_count()); #ifdef PARAM_REGISTERS static const Register kParamRegisters[] = {PARAM_REGISTERS}; static const int kParamRegisterCount = static_cast(arraysize(kParamRegisters)); #else static const Register* kParamRegisters = nullptr; static const int kParamRegisterCount = 0; #endif #ifdef STACK_SHADOW_WORDS int stack_offset = STACK_SHADOW_WORDS; #else int stack_offset = 0; #endif // Add register and/or stack parameter(s). for (int i = 0; i < parameter_count; i++) { if (i < kParamRegisterCount) { locations.AddParam(regloc(kParamRegisters[i])); } else { locations.AddParam( LinkageLocation::ForCallerFrameSlot(-1 - stack_offset)); stack_offset++; } } #ifdef CALLEE_SAVE_REGISTERS const RegList kCalleeSaveRegisters = CALLEE_SAVE_REGISTERS; #else const RegList kCalleeSaveRegisters = 0; #endif #ifdef CALLEE_SAVE_FP_REGISTERS const RegList kCalleeSaveFPRegisters = CALLEE_SAVE_FP_REGISTERS; #else const RegList kCalleeSaveFPRegisters = 0; #endif // The target for C calls is always an address (i.e. machine pointer). MachineType target_type = MachineType::Pointer(); LinkageLocation target_loc = LinkageLocation::ForAnyRegister(); return new (zone) CallDescriptor( // -- CallDescriptor::kCallAddress, // kind target_type, // target MachineType target_loc, // target location msig, // machine_sig locations.Build(), // location_sig 0, // stack_parameter_count Operator::kNoProperties, // properties kCalleeSaveRegisters, // callee-saved registers kCalleeSaveFPRegisters, // callee-saved fp regs CallDescriptor::kNoFlags, // flags "c-call"); } } // namespace compiler } // namespace internal } // namespace v8