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| // Copyright 2015 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.
|
| // +build msan
|
| #include "go_asm.h"
| #include "go_tls.h"
| #include "funcdata.h"
| #include "textflag.h"
|
| // This is like race_amd64.s, but for the msan calls.
| // See race_amd64.s for detailed comments.
|
| #ifdef GOOS_windows
| #define RARG0 CX
| #define RARG1 DX
| #define RARG2 R8
| #define RARG3 R9
| #else
| #define RARG0 DI
| #define RARG1 SI
| #define RARG2 DX
| #define RARG3 CX
| #endif
|
| // func runtime·domsanread(addr unsafe.Pointer, sz uintptr)
| // Called from msanread.
| TEXT runtime·domsanread(SB), NOSPLIT, $0-16
| MOVQ addr+0(FP), RARG0
| MOVQ size+8(FP), RARG1
| // void __msan_read_go(void *addr, uintptr_t sz);
| MOVQ $__msan_read_go(SB), AX
| JMP msancall<>(SB)
|
| // func runtime·msanwrite(addr unsafe.Pointer, sz uintptr)
| // Called from instrumented code.
| TEXT runtime·msanwrite(SB), NOSPLIT, $0-16
| MOVQ addr+0(FP), RARG0
| MOVQ size+8(FP), RARG1
| // void __msan_write_go(void *addr, uintptr_t sz);
| MOVQ $__msan_write_go(SB), AX
| JMP msancall<>(SB)
|
| // func runtime·msanmalloc(addr unsafe.Pointer, sz uintptr)
| TEXT runtime·msanmalloc(SB), NOSPLIT, $0-16
| MOVQ addr+0(FP), RARG0
| MOVQ size+8(FP), RARG1
| // void __msan_malloc_go(void *addr, uintptr_t sz);
| MOVQ $__msan_malloc_go(SB), AX
| JMP msancall<>(SB)
|
| // func runtime·msanfree(addr unsafe.Pointer, sz uintptr)
| TEXT runtime·msanfree(SB), NOSPLIT, $0-16
| MOVQ addr+0(FP), RARG0
| MOVQ size+8(FP), RARG1
| // void __msan_free_go(void *addr, uintptr_t sz);
| MOVQ $__msan_free_go(SB), AX
| JMP msancall<>(SB)
|
| // Switches SP to g0 stack and calls (AX). Arguments already set.
| TEXT msancall<>(SB), NOSPLIT, $0-0
| get_tls(R12)
| MOVQ g(R12), R14
| MOVQ SP, R12 // callee-saved, preserved across the CALL
| CMPQ R14, $0
| JE call // no g; still on a system stack
|
| MOVQ g_m(R14), R13
| // Switch to g0 stack.
| MOVQ m_g0(R13), R10
| CMPQ R10, R14
| JE call // already on g0
|
| MOVQ (g_sched+gobuf_sp)(R10), SP
| call:
| ANDQ $~15, SP // alignment for gcc ABI
| CALL AX
| MOVQ R12, SP
| RET
|
|
