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// Copyright 2023 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
#include "go_asm.h"
#include "textflag.h"
#define RARG0 R4
#define RARG1 R5
#define RARG2 R6
#define FARG R7
// func runtime·domsanread(addr unsafe.Pointer, sz uintptr)
// Called from msanread.
TEXT runtime·domsanread(SB), NOSPLIT, $0-16
MOVV addr+0(FP), RARG0
MOVV sz+8(FP), RARG1
// void __msan_read_go(void *addr, uintptr_t sz);
MOVV $__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
MOVV addr+0(FP), RARG0
MOVV sz+8(FP), RARG1
// void __msan_write_go(void *addr, uintptr_t sz);
MOVV $__msan_write_go(SB), FARG
JMP msancall<>(SB)
// func runtime·msanmalloc(addr unsafe.Pointer, sz uintptr)
TEXT runtime·msanmalloc(SB), NOSPLIT, $0-16
MOVV addr+0(FP), RARG0
MOVV sz+8(FP), RARG1
// void __msan_malloc_go(void *addr, uintptr_t sz);
MOVV $__msan_malloc_go(SB), FARG
JMP msancall<>(SB)
// func runtime·msanfree(addr unsafe.Pointer, sz uintptr)
TEXT runtime·msanfree(SB), NOSPLIT, $0-16
MOVV addr+0(FP), RARG0
MOVV sz+8(FP), RARG1
// void __msan_free_go(void *addr, uintptr_t sz);
MOVV $__msan_free_go(SB), FARG
JMP msancall<>(SB)
// func runtime·msanmove(dst, src unsafe.Pointer, sz uintptr)
TEXT runtime·msanmove(SB), NOSPLIT, $0-24
MOVV dst+0(FP), RARG0
MOVV src+8(FP), RARG1
MOVV sz+16(FP), RARG2
// void __msan_memmove(void *dst, void *src, uintptr_t sz);
MOVV $__msan_memmove(SB), FARG
JMP msancall<>(SB)
// Switches SP to g0 stack and calls (FARG). Arguments already set.
TEXT msancall<>(SB), NOSPLIT, $0-0
MOVV R3, R23 // callee-saved
BEQ g, g0stack // no g, still on a system stack
MOVV g_m(g), R14
MOVV m_g0(R14), R15
BEQ R15, g, g0stack
MOVV (g_sched+gobuf_sp)(R15), R9
MOVV R9, R3
g0stack:
JAL (FARG)
MOVV R23, R3
RET
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