1// Copyright 2023 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 msan
6
7#include "go_asm.h"
8#include "textflag.h"
9
10#define RARG0 R4
11#define RARG1 R5
12#define RARG2 R6
13#define FARG  R7
14
15// func runtime·domsanread(addr unsafe.Pointer, sz uintptr)
16// Called from msanread.
17TEXT	runtime·domsanread(SB), NOSPLIT, $0-16
18	MOVV	addr+0(FP), RARG0
19	MOVV	sz+8(FP), RARG1
20	// void __msan_read_go(void *addr, uintptr_t sz);
21	MOVV	$__msan_read_go(SB), FARG
22	JMP	msancall<>(SB)
23
24// func runtime·msanwrite(addr unsafe.Pointer, sz uintptr)
25// Called from instrumented code.
26TEXT	runtime·msanwrite(SB), NOSPLIT, $0-16
27	MOVV	addr+0(FP), RARG0
28	MOVV	sz+8(FP), RARG1
29	// void __msan_write_go(void *addr, uintptr_t sz);
30	MOVV	$__msan_write_go(SB), FARG
31	JMP	msancall<>(SB)
32
33// func runtime·msanmalloc(addr unsafe.Pointer, sz uintptr)
34TEXT	runtime·msanmalloc(SB), NOSPLIT, $0-16
35	MOVV	addr+0(FP), RARG0
36	MOVV	sz+8(FP), RARG1
37	// void __msan_malloc_go(void *addr, uintptr_t sz);
38	MOVV	$__msan_malloc_go(SB), FARG
39	JMP	msancall<>(SB)
40
41// func runtime·msanfree(addr unsafe.Pointer, sz uintptr)
42TEXT	runtime·msanfree(SB), NOSPLIT, $0-16
43	MOVV	addr+0(FP), RARG0
44	MOVV	sz+8(FP), RARG1
45	// void __msan_free_go(void *addr, uintptr_t sz);
46	MOVV	$__msan_free_go(SB), FARG
47	JMP	msancall<>(SB)
48
49// func runtime·msanmove(dst, src unsafe.Pointer, sz uintptr)
50TEXT	runtime·msanmove(SB), NOSPLIT, $0-24
51	MOVV	dst+0(FP), RARG0
52	MOVV	src+8(FP), RARG1
53	MOVV	sz+16(FP), RARG2
54	// void __msan_memmove(void *dst, void *src, uintptr_t sz);
55	MOVV	$__msan_memmove(SB), FARG
56	JMP	msancall<>(SB)
57
58// Switches SP to g0 stack and calls (FARG). Arguments already set.
59TEXT	msancall<>(SB), NOSPLIT, $0-0
60	MOVV	R3, R23         // callee-saved
61	BEQ	g, g0stack      // no g, still on a system stack
62	MOVV	g_m(g), R14
63	MOVV	m_g0(R14), R15
64	BEQ	R15, g, g0stack
65
66	MOVV	(g_sched+gobuf_sp)(R15), R9
67	MOVV	R9, R3
68
69g0stack:
70	JAL	(FARG)
71	MOVV	R23, R3
72	RET
73