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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. //go: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 sz+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 sz+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 sz+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 sz+8(FP), RARG1 // void __msan_free_go(void *addr, uintptr_t sz); MOVQ $__msan_free_go(SB), AX JMP msancall<>(SB) // func runtime·msanmove(dst, src unsafe.Pointer, sz uintptr) TEXT runtime·msanmove(SB), NOSPLIT, $0-24 MOVQ dst+0(FP), RARG0 MOVQ src+8(FP), RARG1 MOVQ sz+16(FP), RARG2 // void __msan_memmove(void *dst, void *src, uintptr_t sz); MOVQ $__msan_memmove(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