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Editing: asan_amd64.s
// Copyright 2021 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 asan #include "go_asm.h" #include "go_tls.h" #include "funcdata.h" #include "textflag.h" // This is like race_amd64.s, but for the asan 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 // Called from instrumented code. // func runtime·doasanread(addr unsafe.Pointer, sz, sp, pc uintptr) TEXT runtime·doasanread(SB), NOSPLIT, $0-32 MOVQ addr+0(FP), RARG0 MOVQ sz+8(FP), RARG1 MOVQ sp+16(FP), RARG2 MOVQ pc+24(FP), RARG3 // void __asan_read_go(void *addr, uintptr_t sz, void *sp, void *pc); MOVQ $__asan_read_go(SB), AX JMP asancall<>(SB) // func runtime·doasanwrite(addr unsafe.Pointer, sz, sp, pc uintptr) TEXT runtime·doasanwrite(SB), NOSPLIT, $0-32 MOVQ addr+0(FP), RARG0 MOVQ sz+8(FP), RARG1 MOVQ sp+16(FP), RARG2 MOVQ pc+24(FP), RARG3 // void __asan_write_go(void *addr, uintptr_t sz, void *sp, void *pc); MOVQ $__asan_write_go(SB), AX JMP asancall<>(SB) // func runtime·asanunpoison(addr unsafe.Pointer, sz uintptr) TEXT runtime·asanunpoison(SB), NOSPLIT, $0-16 MOVQ addr+0(FP), RARG0 MOVQ sz+8(FP), RARG1 // void __asan_unpoison_go(void *addr, uintptr_t sz); MOVQ $__asan_unpoison_go(SB), AX JMP asancall<>(SB) // func runtime·asanpoison(addr unsafe.Pointer, sz uintptr) TEXT runtime·asanpoison(SB), NOSPLIT, $0-16 MOVQ addr+0(FP), RARG0 MOVQ sz+8(FP), RARG1 // void __asan_poison_go(void *addr, uintptr_t sz); MOVQ $__asan_poison_go(SB), AX JMP asancall<>(SB) // func runtime·asanregisterglobals(addr unsafe.Pointer, n uintptr) TEXT runtime·asanregisterglobals(SB), NOSPLIT, $0-16 MOVQ addr+0(FP), RARG0 MOVQ n+8(FP), RARG1 // void __asan_register_globals_go(void *addr, uintptr_t n); MOVQ $__asan_register_globals_go(SB), AX JMP asancall<>(SB) // Switches SP to g0 stack and calls (AX). Arguments already set. TEXT asancall<>(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
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