msan_arm64.s

     1  // Copyright 2018 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 R0
    11  #define RARG1 R1
    12  #define RARG2 R2
    13  #define FARG R3
    14  
    15  // func runtime·domsanread(addr unsafe.Pointer, sz uintptr)
    16  // Called from msanread.
    17  TEXT	runtime·domsanread(SB), NOSPLIT, $0-16
    18  	MOVD	addr+0(FP), RARG0
    19  	MOVD	size+8(FP), RARG1
    20  	// void __msan_read_go(void *addr, uintptr_t sz);
    21  	MOVD	$__msan_read_go(SB), FARG
    22  	JMP	msancall<>(SB)
    23  
    24  // func runtime·msanwrite(addr unsafe.Pointer, sz uintptr)
    25  // Called from instrumented code.
    26  TEXT	runtime·msanwrite(SB), NOSPLIT, $0-16
    27  	MOVD	addr+0(FP), RARG0
    28  	MOVD	size+8(FP), RARG1
    29  	// void __msan_write_go(void *addr, uintptr_t sz);
    30  	MOVD	$__msan_write_go(SB), FARG
    31  	JMP	msancall<>(SB)
    32  
    33  // func runtime·msanmalloc(addr unsafe.Pointer, sz uintptr)
    34  TEXT	runtime·msanmalloc(SB), NOSPLIT, $0-16
    35  	MOVD	addr+0(FP), RARG0
    36  	MOVD	size+8(FP), RARG1
    37  	// void __msan_malloc_go(void *addr, uintptr_t sz);
    38  	MOVD	$__msan_malloc_go(SB), FARG
    39  	JMP	msancall<>(SB)
    40  
    41  // func runtime·msanfree(addr unsafe.Pointer, sz uintptr)
    42  TEXT	runtime·msanfree(SB), NOSPLIT, $0-16
    43  	MOVD	addr+0(FP), RARG0
    44  	MOVD	size+8(FP), RARG1
    45  	// void __msan_free_go(void *addr, uintptr_t sz);
    46  	MOVD	$__msan_free_go(SB), FARG
    47  	JMP	msancall<>(SB)
    48  
    49  // func runtime·msanmove(dst, src unsafe.Pointer, sz uintptr)
    50  TEXT	runtime·msanmove(SB), NOSPLIT, $0-24
    51  	MOVD	dst+0(FP), RARG0
    52  	MOVD	src+8(FP), RARG1
    53  	MOVD	size+16(FP), RARG2
    54  	// void __msan_memmove(void *dst, void *src, uintptr_t sz);
    55  	MOVD	$__msan_memmove(SB), FARG
    56  	JMP	msancall<>(SB)
    57  
    58  // Switches SP to g0 stack and calls (FARG). Arguments already set.
    59  TEXT	msancall<>(SB), NOSPLIT, $0-0
    60  	MOVD	RSP, R19                  // callee-saved
    61  	CBZ	g, g0stack                // no g, still on a system stack
    62  	MOVD	g_m(g), R10
    63  	MOVD	m_g0(R10), R11
    64  	CMP	R11, g
    65  	BEQ	g0stack
    66  
    67  	MOVD	(g_sched+gobuf_sp)(R11), R4
    68  	MOVD	R4, RSP
    69  
    70  g0stack:
    71  	BL	(FARG)
    72  	MOVD	R19, RSP
    73  	RET
    74
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