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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build msan
// +build msan
#include "go_asm.h"
#include "textflag.h"
#define RARG0 R0
#define RARG1 R1
#define RARG2 R2
#define FARG R3
// func runtime·domsanread(addr unsafe.Pointer, sz uintptr)
// Called from msanread.
TEXT runtime·domsanread(SB), NOSPLIT, $0-16
MOVD addr+0(FP), RARG0
MOVD size+8(FP), RARG1
// void __msan_read_go(void *addr, uintptr_t sz);
MOVD $__msan_read_go(SB), FARG
JMP msancall<>(SB)
// func runtime·msanwrite(addr unsafe.Pointer, sz uintptr)
// Called from instrumented code.
TEXT runtime·msanwrite(SB), NOSPLIT, $0-16
MOVD addr+0(FP), RARG0
MOVD size+8(FP), RARG1
// void __msan_write_go(void *addr, uintptr_t sz);
MOVD $__msan_write_go(SB), FARG
JMP msancall<>(SB)
// func runtime·msanmalloc(addr unsafe.Pointer, sz uintptr)
TEXT runtime·msanmalloc(SB), NOSPLIT, $0-16
MOVD addr+0(FP), RARG0
MOVD size+8(FP), RARG1
// void __msan_malloc_go(void *addr, uintptr_t sz);
MOVD $__msan_malloc_go(SB), FARG
JMP msancall<>(SB)
// func runtime·msanfree(addr unsafe.Pointer, sz uintptr)
TEXT runtime·msanfree(SB), NOSPLIT, $0-16
MOVD addr+0(FP), RARG0
MOVD size+8(FP), RARG1
// void __msan_free_go(void *addr, uintptr_t sz);
MOVD $__msan_free_go(SB), FARG
JMP msancall<>(SB)
// func runtime·msanmove(dst, src unsafe.Pointer, sz uintptr)
TEXT runtime·msanmove(SB), NOSPLIT, $0-24
MOVD dst+0(FP), RARG0
MOVD src+8(FP), RARG1
MOVD size+16(FP), RARG2
// void __msan_memmove(void *dst, void *src, uintptr_t sz);
MOVD $__msan_memmove(SB), FARG
JMP msancall<>(SB)
// Switches SP to g0 stack and calls (FARG). Arguments already set.
TEXT msancall<>(SB), NOSPLIT, $0-0
MOVD RSP, R19 // callee-saved
CBZ g, g0stack // no g, still on a system stack
MOVD g_m(g), R10
MOVD m_g0(R10), R11
CMP R11, g
BEQ g0stack
MOVD (g_sched+gobuf_sp)(R11), R4
MOVD R4, RSP
g0stack:
BL (FARG)
MOVD R19, RSP
RET
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