shithub: mc

ref: ac7fed3ddfa3caf2e2c97f221e023b75ec9693ac
dir: /libstd/syscall+freebsd-x64.s/

View raw version
.globl sys$syscall
sys$syscall:
	pushq %rbp
	pushq %rdi
	pushq %rsi
	pushq %rdx
	pushq %r10
	pushq %r8
	pushq %r9
	pushq %rcx
	pushq %r11
	/*
	hack: We load 6 args regardless of
	how many we actually have. This may
	load junk values, but if the syscall
	doesn't use them, it's going to be
	harmless.
	 */
	movq 80 (%rsp),%rax
	movq 88 (%rsp),%rdi
	movq 96 (%rsp),%rsi
	movq 104(%rsp),%rdx
	movq 112(%rsp),%r10
	movq 120(%rsp),%r8
	movq 128(%rsp),%r9

	syscall

	popq %r11
	popq %rcx
	popq %r9
	popq %r8
	popq %r10
	popq %rdx
	popq %rsi
	popq %rdi
	popq %rbp
	ret