// Copyright 2015 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. // FIXED_FRAME defines the size of the fixed part of a stack frame. A stack // frame looks like this: // // +---------------------+ // | local variable area | // +---------------------+ // | argument area | // +---------------------+ <- R1+FIXED_FRAME // | fixed area | // +---------------------+ <- R1 // // So a function that sets up a stack frame at all uses as least FIXED_FRAME // bytes of stack. This mostly affects assembly that calls other functions // with arguments (the arguments should be stored at FIXED_FRAME+0(R1), // FIXED_FRAME+8(R1) etc) and some other low-level places. // // The reason for using a constant is when code is compiled as PIC on ppc64le // the fixed part of the stack is 32 bytes large (although PIC is not actually // supported yet). #ifdef GOARCH_ppc64 #define FIXED_FRAME 8 #endif #ifdef GOARCH_ppc64le #define FIXED_FRAME 8 #endif