banan-os/kernel/arch/x86_64/Signal.S

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ArmAsm
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.section .userspace, "ax"
// stack contains
// return address
// signal number
// signal handler
.global signal_trampoline
signal_trampoline:
pushq %rax
pushq %rbx
pushq %rcx
pushq %rdx
pushq %rbp
pushq %rdi
pushq %rsi
pushq %r8
pushq %r9
pushq %r10
pushq %r11
pushq %r12
pushq %r13
pushq %r14
pushq %r15
movq 128(%rsp), %rdi
movq 120(%rsp), %rax
// align stack to 16 bytes
movq %rsp, %rbx
andq $0x0F, %rbx
subq %rbx, %rsp
call *%rax
// restore stack
addq %rbx, %rsp
popq %r15
popq %r14
popq %r13
popq %r12
popq %r11
popq %r10
popq %r9
popq %r8
popq %rsi
popq %rdi
popq %rbp
popq %rdx
popq %rcx
popq %rbx
popq %rax
addq $16, %rsp
// return over red-zone
ret $128