diff options
Diffstat (limited to 'src/runtime/cgo/asm_amd64.s')
| -rw-r--r-- | src/runtime/cgo/asm_amd64.s | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/runtime/cgo/asm_amd64.s b/src/runtime/cgo/asm_amd64.s index e223a6c870..f254622f23 100644 --- a/src/runtime/cgo/asm_amd64.s +++ b/src/runtime/cgo/asm_amd64.s @@ -5,6 +5,14 @@ #include "textflag.h" #include "abi_amd64.h" +// Set the x_crosscall2_ptr C function pointer variable point to crosscall2. +// It's such a pointer chain: _crosscall2_ptr -> x_crosscall2_ptr -> crosscall2 +TEXT ·set_crosscall2(SB),NOSPLIT,$0-0 + MOVQ _crosscall2_ptr(SB), AX + MOVQ $crosscall2(SB), BX + MOVQ BX, (AX) + RET + // Called by C code generated by cmd/cgo. // func crosscall2(fn, a unsafe.Pointer, n int32, ctxt uintptr) // Saves C callee-saved registers and calls cgocallback with three arguments. |