| // 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 |
