| // 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 |
