--- zzzz-none-000/linux-3.10.107/arch/x86/um/stub_64.S 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/arch/x86/um/stub_64.S 2021-02-04 17:41:59.000000000 +0000 @@ -1,25 +1,9 @@ #include <as-layout.h> - .globl syscall_stub .section .__syscall_stub, "ax" -syscall_stub: - syscall - /* We don't have 64-bit constants, so this constructs the address - * we need. - */ - movq $(STUB_DATA >> 32), %rbx - salq $32, %rbx - movq $(STUB_DATA & 0xffffffff), %rcx - or %rcx, %rbx - movq %rax, (%rbx) - int3 - .globl batch_syscall_stub batch_syscall_stub: - mov $(STUB_DATA >> 32), %rbx - sal $32, %rbx - mov $(STUB_DATA & 0xffffffff), %rax - or %rax, %rbx + mov $(STUB_DATA), %rbx /* load pointer to first operation */ mov %rbx, %rsp add $0x10, %rsp