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// 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 "textflag.h"
#define RARG0 R0
#define RARG1 R1
#define RARG2 R2
#define RARG3 R3
#define FARG R4
// Called from instrumented code.
// func runtime·doasanread(addr unsafe.Pointer, sz, sp, pc uintptr)
TEXT runtime·doasanread(SB), NOSPLIT, $0-32
MOVD addr+0(FP), RARG0
MOVD size+8(FP), RARG1
MOVD sp+16(FP), RARG2
MOVD pc+24(FP), RARG3
// void __asan_read_go(void *addr, uintptr_t sz, void *sp, void *pc);
MOVD $__asan_read_go(SB), FARG
JMP asancall<>(SB)
// func runtime·doasanwrite(addr unsafe.Pointer, sz, sp, pc uintptr)
TEXT runtime·doasanwrite(SB), NOSPLIT, $0-32
MOVD addr+0(FP), RARG0
MOVD size+8(FP), RARG1
MOVD sp+16(FP), RARG2
MOVD pc+24(FP), RARG3
// void __asan_write_go(void *addr, uintptr_t sz, void *sp, void *pc);
MOVD $__asan_write_go(SB), FARG
JMP asancall<>(SB)
// func runtime·asanunpoison(addr unsafe.Pointer, sz uintptr)
TEXT runtime·asanunpoison(SB), NOSPLIT, $0-16
MOVD addr+0(FP), RARG0
MOVD size+8(FP), RARG1
// void __asan_unpoison_go(void *addr, uintptr_t sz);
MOVD $__asan_unpoison_go(SB), FARG
JMP asancall<>(SB)
// func runtime·asanpoison(addr unsafe.Pointer, sz uintptr)
TEXT runtime·asanpoison(SB), NOSPLIT, $0-16
MOVD addr+0(FP), RARG0
MOVD size+8(FP), RARG1
// void __asan_poison_go(void *addr, uintptr_t sz);
MOVD $__asan_poison_go(SB), FARG
JMP asancall<>(SB)
// Switches SP to g0 stack and calls (FARG). Arguments already set.
TEXT asancall<>(SB), NOSPLIT, $0-0
MOVD RSP, R19 // callee-saved
CBZ g, g0stack // no g, still on a system stack
MOVD g_m(g), R10
MOVD m_g0(R10), R11
CMP R11, g
BEQ g0stack
MOVD (g_sched+gobuf_sp)(R11), R5
MOVD R5, RSP
g0stack:
BL (FARG)
MOVD R19, RSP
RET
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