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

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# uint64_t read_rip()
.global read_rip
read_rip:
popq %rax
jmp *%rax
exit_thread_trampoline:
movq 8(%rsp), %rdi
ret
# void start_thread(uint64_t rsp, uint64_t rip)
.global start_thread
start_thread:
movq %rdi, %rsp
popq %rdi
movq $0, %rbp
pushq $exit_thread_trampoline
sti
jmp *%rsi
# void continue_thread(uint64_t rsp, uint64_t rip)
.global continue_thread
continue_thread:
movq %rdi, %rsp
movq $0, %rax
jmp *%rsi
# void thread_jump_userspace(uint64_t rsp, uint64_t rip)
.global thread_jump_userspace
thread_jump_userspace:
pushq $0x23
pushq %rdi
pushfq
pushq $0x1B
pushq %rsi
iretq