mirror of
https://github.com/golang/go
synced 2024-11-19 16:44:43 -07:00
77 lines
2.0 KiB
ArmAsm
77 lines
2.0 KiB
ArmAsm
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build msan
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#include "go_asm.h"
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#include "go_tls.h"
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#include "funcdata.h"
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#include "textflag.h"
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// This is like race_amd64.s, but for the msan calls.
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// See race_amd64.s for detailed comments.
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#ifdef GOOS_windows
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#define RARG0 CX
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#define RARG1 DX
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#define RARG2 R8
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#define RARG3 R9
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#else
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#define RARG0 DI
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#define RARG1 SI
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#define RARG2 DX
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#define RARG3 CX
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#endif
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// func runtime·msanread(addr unsafe.Pointer, sz uintptr)
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// Called from instrumented code.
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TEXT runtime·msanread(SB), NOSPLIT, $0-16
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MOVQ addr+0(FP), RARG0
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MOVQ size+8(FP), RARG1
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// void __msan_read_go(void *addr, uintptr_t sz);
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MOVQ $__msan_read_go(SB), AX
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JMP msancall<>(SB)
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// func runtime·msanwrite(addr unsafe.Pointer, sz uintptr)
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// Called from instrumented code.
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TEXT runtime·msanwrite(SB), NOSPLIT, $0-16
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MOVQ addr+0(FP), RARG0
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MOVQ size+8(FP), RARG1
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// void __msan_write_go(void *addr, uintptr_t sz);
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MOVQ $__msan_write_go(SB), AX
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JMP msancall<>(SB)
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// func runtime·msanmalloc(addr unsafe.Pointer, sz uintptr)
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TEXT runtime·msanmalloc(SB), NOSPLIT, $0-16
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MOVQ addr+0(FP), RARG0
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MOVQ size+8(FP), RARG1
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// void __msan_malloc_go(void *addr, uintptr_t sz);
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MOVQ $__msan_malloc_go(SB), AX
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JMP msancall<>(SB)
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// func runtime·msanfree(addr unsafe.Pointer, sz uintptr)
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TEXT runtime·msanfree(SB), NOSPLIT, $0-16
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MOVQ addr+0(FP), RARG0
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MOVQ size+8(FP), RARG1
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// void __msan_free_go(void *addr, uintptr_t sz);
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MOVQ $__msan_free_go(SB), AX
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JMP msancall<>(SB)
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// Switches SP to g0 stack and calls (AX). Arguments already set.
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TEXT msancall<>(SB), NOSPLIT, $0-0
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get_tls(R12)
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MOVQ g(R12), R14
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MOVQ g_m(R14), R13
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// Switch to g0 stack.
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MOVQ SP, R12 // callee-saved, preserved across the CALL
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MOVQ m_g0(R13), R10
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CMPQ R10, R14
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JE call // already on g0
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MOVQ (g_sched+gobuf_sp)(R10), SP
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call:
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ANDQ $~15, SP // alignment for gcc ABI
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CALL AX
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MOVQ R12, SP
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RET
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