github.com/stingnevermore/go@v0.0.0-20180120041312-3810f5bfed72/src/runtime/asm.s (about)

     1  // Copyright 2014 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  #include "textflag.h"
     6  
     7  // funcdata for functions with no local variables in frame.
     8  // Define two zero-length bitmaps, because the same index is used
     9  // for the local variables as for the argument frame, and assembly
    10  // frames have two argument bitmaps, one without results and one with results.
    11  DATA runtime·no_pointers_stackmap+0x00(SB)/4, $2
    12  DATA runtime·no_pointers_stackmap+0x04(SB)/4, $0
    13  GLOBL runtime·no_pointers_stackmap(SB),RODATA, $8
    14  
    15  GLOBL runtime·mheap_(SB), NOPTR, $0
    16  GLOBL runtime·memstats(SB), NOPTR, $0
    17  
    18  // NaCl requires that these skips be verifiable machine code.
    19  #ifdef GOARCH_amd64
    20  #define SKIP4 BYTE $0x90; BYTE $0x90; BYTE $0x90; BYTE $0x90
    21  #endif
    22  #ifdef GOARCH_386
    23  #define SKIP4 BYTE $0x90; BYTE $0x90; BYTE $0x90; BYTE $0x90
    24  #endif
    25  #ifdef GOARCH_amd64p32
    26  #define SKIP4 BYTE $0x90; BYTE $0x90; BYTE $0x90; BYTE $0x90
    27  #endif
    28  #ifndef SKIP4
    29  #define SKIP4 WORD $0
    30  #endif
    31  
    32  #define SKIP16 SKIP4; SKIP4; SKIP4; SKIP4
    33  #define SKIP64 SKIP16; SKIP16; SKIP16; SKIP16
    34  
    35  // This function must be sizeofSkipFunction bytes.
    36  TEXT runtime·skipPleaseUseCallersFrames(SB),NOSPLIT,$0-0
    37  	SKIP64; SKIP64; SKIP64; SKIP64