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Diffstat (limited to 'src/runtime/libfuzzer_arm64.s')
| -rw-r--r-- | src/runtime/libfuzzer_arm64.s | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/runtime/libfuzzer_arm64.s b/src/runtime/libfuzzer_arm64.s new file mode 100644 index 0000000..121673e --- /dev/null +++ b/src/runtime/libfuzzer_arm64.s @@ -0,0 +1,31 @@ +// Copyright 2019 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 libfuzzer + +#include "go_asm.h" +#include "textflag.h" + +// Based on race_arm64.s; see commentary there. + +// func runtime·libfuzzerCall(fn, arg0, arg1 uintptr) +// Calls C function fn from libFuzzer and passes 2 arguments to it. +TEXT runtime·libfuzzerCall(SB), NOSPLIT, $0-24 + MOVD fn+0(FP), R9 + MOVD arg0+8(FP), R0 + MOVD arg1+16(FP), R1 + + MOVD g_m(g), R10 + + // Switch to g0 stack. + MOVD RSP, R19 // callee-saved, preserved across the CALL + MOVD m_g0(R10), R11 + CMP R11, g + BEQ call // already on g0 + MOVD (g_sched+gobuf_sp)(R11), R12 + MOVD R12, RSP +call: + BL R9 + MOVD R19, RSP + RET |