1// Copyright 2021 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//go:build asan 6 7#include "go_asm.h" 8#include "go_tls.h" 9#include "funcdata.h" 10#include "textflag.h" 11 12// This is like race_amd64.s, but for the asan calls. 13// See race_amd64.s for detailed comments. 14 15#ifdef GOOS_windows 16#define RARG0 CX 17#define RARG1 DX 18#else 19#define RARG0 DI 20#define RARG1 SI 21#endif 22 23// Called from intrumented code. 24// func runtime·asanread(addr unsafe.Pointer, sz uintptr) 25TEXT runtime·asanread(SB), NOSPLIT, $0-16 26 MOVQ addr+0(FP), RARG0 27 MOVQ size+8(FP), RARG1 28 // void __asan_read_go(void *addr, uintptr_t sz); 29 MOVQ $__asan_read_go(SB), AX 30 JMP asancall<>(SB) 31 32// func runtime·asanwrite(addr unsafe.Pointer, sz uintptr) 33TEXT runtime·asanwrite(SB), NOSPLIT, $0-16 34 MOVQ addr+0(FP), RARG0 35 MOVQ size+8(FP), RARG1 36 // void __asan_write_go(void *addr, uintptr_t sz); 37 MOVQ $__asan_write_go(SB), AX 38 JMP asancall<>(SB) 39 40// func runtime·asanunpoison(addr unsafe.Pointer, sz uintptr) 41TEXT runtime·asanunpoison(SB), NOSPLIT, $0-16 42 MOVQ addr+0(FP), RARG0 43 MOVQ size+8(FP), RARG1 44 // void __asan_unpoison_go(void *addr, uintptr_t sz); 45 MOVQ $__asan_unpoison_go(SB), AX 46 JMP asancall<>(SB) 47 48// func runtime·asanpoison(addr unsafe.Pointer, sz uintptr) 49TEXT runtime·asanpoison(SB), NOSPLIT, $0-16 50 MOVQ addr+0(FP), RARG0 51 MOVQ size+8(FP), RARG1 52 // void __asan_poison_go(void *addr, uintptr_t sz); 53 MOVQ $__asan_poison_go(SB), AX 54 JMP asancall<>(SB) 55 56// Switches SP to g0 stack and calls (AX). Arguments already set. 57TEXT asancall<>(SB), NOSPLIT, $0-0 58 get_tls(R12) 59 MOVQ g(R12), R14 60 MOVQ SP, R12 // callee-saved, preserved across the CALL 61 CMPQ R14, $0 62 JE call // no g; still on a system stack 63 64 MOVQ g_m(R14), R13 65 // Switch to g0 stack. 66 MOVQ m_g0(R13), R10 67 CMPQ R10, R14 68 JE call // already on g0 69 70 MOVQ (g_sched+gobuf_sp)(R10), SP 71call: 72 ANDQ $~15, SP // alignment for gcc ABI 73 CALL AX 74 MOVQ R12, SP 75 RET 76