tanya/arch/x64/linux/syscall.S

/*
The kernel uses the following registers:
%rdi, %rsi, %rdx, %r8, %r9, %r10

The number of the syscall is passed in %rax.

A syscall clobbers:
%rax, %rcx, %r11

The returned value is placed in %rax.
*/
	.text

	.globl syscall1
	.type syscall1, @function

syscall1:
	movq %rsi, %rax // Syscall number.

	syscall

	ret


// 2 parameters.
	.globl _D5tanya3sys5linux7syscall7syscallFNbNilllZl
	.type _D5tanya3sys5linux7syscall7syscallFNbNilllZl, @function

_D5tanya3sys5linux7syscall7syscallFNbNilllZl:
	movq %rdx, %rax

	syscall

	ret


// 6 parameters.
	.globl _D5tanya3sys5linux7syscall7syscallFNbNilllllllZl
	.type _D5tanya3sys5linux7syscall7syscallFNbNilllllllZl, @function

_D5tanya3sys5linux7syscall7syscallFNbNilllllllZl:
	pushq %rbp
	movq %rsp, %rbp

	movq 16(%rbp), %rax

	mov %rcx, %r10

	syscall

	leave
	ret