diff options
Diffstat (limited to 'src/runtime/libfuzzer_amd64.s')
| -rw-r--r-- | src/runtime/libfuzzer_amd64.s | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/src/runtime/libfuzzer_amd64.s b/src/runtime/libfuzzer_amd64.s index 5ea77f59de..032821fbbc 100644 --- a/src/runtime/libfuzzer_amd64.s +++ b/src/runtime/libfuzzer_amd64.s @@ -13,12 +13,41 @@ #ifdef GOOS_windows #define RARG0 CX #define RARG1 DX +#define RARG0 R8 +#define RARG1 R9 #else #define RARG0 DI #define RARG1 SI +#define RARG2 DX +#define RARG3 CX #endif -// void runtime·libfuzzerCall(fn, arg0, arg1 uintptr) +// 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 + MOVQ fn+0(FP), AX + MOVQ hookId+8(FP), RARG0 + MOVQ s1+16(FP), RARG1 + MOVQ s2+24(FP), RARG2 + MOVQ result+32(FP), RARG3 + + get_tls(R12) + MOVQ g(R12), R14 + MOVQ g_m(R14), R13 + + // Switch to g0 stack. + MOVQ SP, R12 // callee-saved, preserved across the CALL + 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 + +// void runtime·libfuzzerCallTraceInit(fn, start, end *byte) // Calls C function fn from libFuzzer and passes 2 arguments to it. TEXT runtime·libfuzzerCall(SB), NOSPLIT, $0-24 MOVQ fn+0(FP), AX |