Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #include <as-layout.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) .section .__syscall_stub, "ax"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 	.globl batch_syscall_stub
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) batch_syscall_stub:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 	mov	$(STUB_DATA), %rbx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 	/* load pointer to first operation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 	mov	%rbx, %rsp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 	add	$0x10, %rsp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	/* load length of additional data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	mov	0x0(%rsp), %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	/* if(length == 0) : end of list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	/* write possible 0 to header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	mov	%rax, 8(%rbx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	cmp	$0, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	jz	done
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	/* save current pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	mov	%rsp, 8(%rbx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	/* skip additional data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	add	%rax, %rsp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	/* load syscall-# */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	pop	%rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	/* load syscall params */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	pop	%rdi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	pop	%rsi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	pop	%rdx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	pop	%r10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)  	pop	%r8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	pop	%r9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	/* execute syscall */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	/* check return value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	pop	%rcx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	cmp	%rcx, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	je	again
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	/* save return value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	mov	%rax, (%rbx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	/* stop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	int3