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 asan
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 RARG3 R7
14#define FARG  R8
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	MOVV	addr+0(FP), RARG0
20	MOVV	sz+8(FP), RARG1
21	MOVV	sp+16(FP), RARG2
22	MOVV	pc+24(FP), RARG3
23	// void __asan_read_go(void *addr, uintptr_t sz, void *sp, void *pc);
24	MOVV	$__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	MOVV	addr+0(FP), RARG0
30	MOVV	sz+8(FP), RARG1
31	MOVV	sp+16(FP), RARG2
32	MOVV	pc+24(FP), RARG3
33	// void __asan_write_go(void *addr, uintptr_t sz, void *sp, void *pc);
34	MOVV	$__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	MOVV	addr+0(FP), RARG0
40	MOVV	sz+8(FP), RARG1
41	// void __asan_unpoison_go(void *addr, uintptr_t sz);
42	MOVV	$__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	MOVV	addr+0(FP), RARG0
48	MOVV	sz+8(FP), RARG1
49	// void __asan_poison_go(void *addr, uintptr_t sz);
50	MOVV	$__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	MOVV	addr+0(FP), RARG0
56	MOVV	n+8(FP), RARG1
57	// void __asan_register_globals_go(void *addr, uintptr_t n);
58	MOVV	$__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	MOVV	R3, R23         // callee-saved
64	BEQ	g, g0stack      // no g, still on a system stack
65	MOVV	g_m(g), R14
66	MOVV	m_g0(R14), R15
67	BEQ	R15, g, g0stack
68
69	MOVV	(g_sched+gobuf_sp)(R15), R9
70	MOVV	R9, R3
71
72g0stack:
73	JAL	(FARG)
74	MOVV	R23, R3
75	RET
76