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Diffstat (limited to '')
| -rw-r--r-- | src/runtime/asm_ppc64x.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/runtime/asm_ppc64x.h b/src/runtime/asm_ppc64x.h new file mode 100644 index 0000000..5e55055 --- /dev/null +++ b/src/runtime/asm_ppc64x.h @@ -0,0 +1,25 @@ +// 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 to make supporting PIC easier (although +// we only support PIC on ppc64le which has a minimum 32 bytes of stack frame, +// and currently always use that much, PIC on ppc64 would need to use 48). + +#define FIXED_FRAME 32 |