diff options
Diffstat (limited to 'src/runtime/libfuzzer_arm64.s')
| -rw-r--r-- | src/runtime/libfuzzer_arm64.s | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/src/runtime/libfuzzer_arm64.s b/src/runtime/libfuzzer_arm64.s index b0146682a2..f9b67913e2 100644 --- a/src/runtime/libfuzzer_arm64.s +++ b/src/runtime/libfuzzer_arm64.s @@ -9,12 +9,40 @@ // Based on race_arm64.s; see commentary there. +#define RARG0 R0 +#define RARG1 R1 +#define RARG2 R2 +#define RARG3 R3 + +// void runtime·libfuzzerCall4(fn, hookId int, s1, s2 unsafe.Pointer, result uintptr) +// Calls C function fn from libFuzzer and passes 4 arguments to it. +TEXT runtime·libfuzzerCall4(SB), NOSPLIT, $0-40 + MOVD fn+0(FP), R9 + MOVD hookId+8(FP), RARG0 + MOVD s1+16(FP), RARG1 + MOVD s2+24(FP), RARG2 + MOVD result+32(FP), RARG3 + + 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 + // 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 arg0+8(FP), RARG0 + MOVD arg1+16(FP), RARG1 MOVD g_m(g), R10 |