1#include <as-layout.h>
 2
 3.section .__syscall_stub, "ax"
 4
 5	.globl batch_syscall_stub
 6batch_syscall_stub:
 7	/* load pointer to first operation */
 8	mov	$(STUB_DATA+8), %esp
 9
 
10again:
11	/* load length of additional data */
12	mov	0x0(%esp), %eax
13
14	/* if(length == 0) : end of list */
15	/* write possible 0 to header */
16	mov	%eax, STUB_DATA+4
17	cmpl	$0, %eax
18	jz	done
19
20	/* save current pointer */
21	mov	%esp, STUB_DATA+4
22
23	/* skip additional data */
24	add	%eax, %esp
25
26	/* load syscall-# */
27	pop	%eax
28
29	/* load syscall params */
30	pop	%ebx
31	pop	%ecx
32	pop	%edx
33	pop	%esi
34 	pop	%edi
35	pop	%ebp
36
37	/* execute syscall */
38	int	$0x80
39
 
 
 
 
40	/* check return value */
41	pop	%ebx
42	cmp	%ebx, %eax
43	je	again
44
45done:
46	/* save return value */
47	mov	%eax, STUB_DATA
48
49	/* stop */
50	int3

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#include <as-layout.h>
 3
 4.section .__syscall_stub, "ax"
 5
 6	.globl batch_syscall_stub
 7batch_syscall_stub:
 8	/* %esp comes in as "top of page" */
 9	mov %esp, %ecx
10	/* %esp has pointer to first operation */
11	add $8, %esp
12again:
13	/* load length of additional data */
14	mov	0x0(%esp), %eax
15
16	/* if(length == 0) : end of list */
17	/* write possible 0 to header */
18	mov	%eax, 0x4(%ecx)
19	cmpl	$0, %eax
20	jz	done
21
22	/* save current pointer */
23	mov	%esp, 0x4(%ecx)
24
25	/* skip additional data */
26	add	%eax, %esp
27
28	/* load syscall-# */
29	pop	%eax
30
31	/* load syscall params */
32	pop	%ebx
33	pop	%ecx
34	pop	%edx
35	pop	%esi
36 	pop	%edi
37	pop	%ebp
38
39	/* execute syscall */
40	int	$0x80
41
42	/* restore top of page pointer in %ecx */
43	mov	%esp, %ecx
44	andl	$(~UM_KERN_PAGE_SIZE) + 1, %ecx
45
46	/* check return value */
47	pop	%ebx
48	cmp	%ebx, %eax
49	je	again
50
51done:
52	/* save return value */
53	mov	%eax, (%ecx)
54
55	/* stop */
56	int3