| // Copyright 2014 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| package sys | |
| type ArchFamilyType int | |
| const ( | |
| AMD64 ArchFamilyType = iota | |
| ARM | |
| ARM64 | |
| I386 | |
| MIPS | |
| MIPS64 | |
| PPC64 | |
| RISCV64 | |
| S390X | |
| WASM | |
| ) | |
| // PtrSize is the size of a pointer in bytes - unsafe.Sizeof(uintptr(0)) but as an ideal constant. | |
| // It is also the size of the machine's native word size (that is, 4 on 32-bit systems, 8 on 64-bit). | |
| const PtrSize = 4 << (^uintptr(0) >> 63) | |
| // AIX requires a larger stack for syscalls. | |
| const StackGuardMultiplier = StackGuardMultiplierDefault*(1-GoosAix) + 2*GoosAix | |
| // ArchFamily is the architecture family (AMD64, ARM, ...) | |
| const ArchFamily ArchFamilyType = _ArchFamily | |
| // BigEndian reports whether the architecture is big-endian. | |
| const BigEndian = GoarchArmbe|GoarchArm64be|GoarchMips|GoarchMips64|GoarchPpc|GoarchPpc64|GoarchS390|GoarchS390x|GoarchSparc|GoarchSparc64 == 1 | |
| // DefaultPhysPageSize is the default physical page size. | |
| const DefaultPhysPageSize = _DefaultPhysPageSize | |
| // PCQuantum is the minimal unit for a program counter (1 on x86, 4 on most other systems). | |
| // The various PC tables record PC deltas pre-divided by PCQuantum. | |
| const PCQuantum = _PCQuantum | |
| // Int64Align is the required alignment for a 64-bit integer (4 on 32-bit systems, 8 on 64-bit). | |
| const Int64Align = PtrSize | |
| // MinFrameSize is the size of the system-reserved words at the bottom | |
| // of a frame (just above the architectural stack pointer). | |
| // It is zero on x86 and PtrSize on most non-x86 (LR-based) systems. | |
| // On PowerPC it is larger, to cover three more reserved words: | |
| // the compiler word, the link editor word, and the TOC save word. | |
| const MinFrameSize = _MinFrameSize | |
| // StackAlign is the required alignment of the SP register. | |
| // The stack must be at least word aligned, but some architectures require more. | |
| const StackAlign = _StackAlign |