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 "textflag.h"
9
10#define RARG0 R0
11#define RARG1 R1
12#define RARG2 R2
13#define RARG3 R3
14#define FARG R4
15
16// Called from instrumented code.
17// func runtime·doasanread(addr unsafe.Pointer, sz, sp, pc uintptr)
18TEXT	runtime·doasanread(SB), NOSPLIT, $0-32
19	MOVD	addr+0(FP), RARG0
20	MOVD	sz+8(FP), RARG1
21	MOVD	sp+16(FP), RARG2
22	MOVD	pc+24(FP), RARG3
23	// void __asan_read_go(void *addr, uintptr_t sz, void *sp, void *pc);
24	MOVD	$__asan_read_go(SB), FARG
25	JMP	asancall<>(SB)
26
27// func runtime·doasanwrite(addr unsafe.Pointer, sz, sp, pc uintptr)
28TEXT	runtime·doasanwrite(SB), NOSPLIT, $0-32
29	MOVD	addr+0(FP), RARG0
30	MOVD	sz+8(FP), RARG1
31	MOVD	sp+16(FP), RARG2
32	MOVD	pc+24(FP), RARG3
33	// void __asan_write_go(void *addr, uintptr_t sz, void *sp, void *pc);
34	MOVD	$__asan_write_go(SB), FARG
35	JMP	asancall<>(SB)
36
37// func runtime·asanunpoison(addr unsafe.Pointer, sz uintptr)
38TEXT	runtime·asanunpoison(SB), NOSPLIT, $0-16
39	MOVD	addr+0(FP), RARG0
40	MOVD	sz+8(FP), RARG1
41	// void __asan_unpoison_go(void *addr, uintptr_t sz);
42	MOVD	$__asan_unpoison_go(SB), FARG
43	JMP	asancall<>(SB)
44
45// func runtime·asanpoison(addr unsafe.Pointer, sz uintptr)
46TEXT	runtime·asanpoison(SB), NOSPLIT, $0-16
47	MOVD	addr+0(FP), RARG0
48	MOVD	sz+8(FP), RARG1
49	// void __asan_poison_go(void *addr, uintptr_t sz);
50	MOVD	$__asan_poison_go(SB), FARG
51	JMP	asancall<>(SB)
52
53// func runtime·asanregisterglobals(addr unsafe.Pointer, n uintptr)
54TEXT	runtime·asanregisterglobals(SB), NOSPLIT, $0-16
55	MOVD	addr+0(FP), RARG0
56	MOVD	n+8(FP), RARG1
57	// void __asan_register_globals_go(void *addr, uintptr_t n);
58	MOVD	$__asan_register_globals_go(SB), FARG
59	JMP	asancall<>(SB)
60
61// Switches SP to g0 stack and calls (FARG). Arguments already set.
62TEXT	asancall<>(SB), NOSPLIT, $0-0
63	MOVD	RSP, R19                  // callee-saved
64	CBZ	g, g0stack                // no g, still on a system stack
65	MOVD	g_m(g), R10
66	MOVD	m_g0(R10), R11
67	CMP	R11, g
68	BEQ	g0stack
69
70	MOVD	(g_sched+gobuf_sp)(R11), R5
71	MOVD	R5, RSP
72
73g0stack:
74	BL	(FARG)
75	MOVD	R19, RSP
76	RET
77