diff options
Diffstat (limited to 'arch/um/sys-x86_64')
| -rw-r--r-- | arch/um/sys-x86_64/stub.S | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/um/sys-x86_64/stub.S b/arch/um/sys-x86_64/stub.S index 31c14925716..957f2eff32c 100644 --- a/arch/um/sys-x86_64/stub.S +++ b/arch/um/sys-x86_64/stub.S @@ -13,3 +13,24 @@ syscall_stub: or %rcx, %rbx movq %rax, (%rbx) int3 + + .globl batch_syscall_stub +batch_syscall_stub: + movq $(UML_CONFIG_STUB_DATA >> 32), %rbx + salq $32, %rbx + movq $(UML_CONFIG_STUB_DATA & 0xffffffff), %rcx + or %rcx, %rbx + movq %rbx, %rsp +again: pop %rax + cmpq $0, %rax +jz done + pop %rdi + pop %rsi + pop %rdx + pop %r10 + pop %r8 + pop %r9 + syscall + mov %rax, (%rbx) + jmp again +done: int3 |