[linux-2.6-block.git] / arch / x86 / um / stub_64.S

/* SPDX-License-Identifier: GPL-2.0 */
#include <as-layout.h>

.section .__syscall_stub, "ax"
	.globl batch_syscall_stub
batch_syscall_stub:
	mov	$(STUB_DATA), %rbx
	/* load pointer to first operation */
	mov	%rbx, %rsp
	add	$0x10, %rsp
again:
	/* load length of additional data */
	mov	0x0(%rsp), %rax

	/* if(length == 0) : end of list */
	/* write possible 0 to header */
	mov	%rax, 8(%rbx)
	cmp	$0, %rax
	jz	done

	/* save current pointer */
	mov	%rsp, 8(%rbx)

	/* skip additional data */
	add	%rax, %rsp

	/* load syscall-# */
	pop	%rax

	/* load syscall params */
	pop	%rdi
	pop	%rsi
	pop	%rdx
	pop	%r10
 	pop	%r8
	pop	%r9

	/* execute syscall */
	syscall

	/* check return value */
	pop	%rcx
	cmp	%rcx, %rax
	je	again

done:
	/* save return value */
	mov	%rax, (%rbx)

	/* stop */
	int3
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
37185b33	2	#include <as-layout.h>
d67b569f	3
276c974a	4	.section .__syscall_stub, "ax"
c5600490 JD	5	.globl batch_syscall_stub
c5600490 JD	6	batch_syscall_stub:
1b2411c2	7	mov $(STUB_DATA), %rbx
07bf731e BS	8	/* load pointer to first operation */
	9	mov %rbx, %rsp
	10	add $0x10, %rsp
	11	again:
	12	/* load length of additional data */
	13	mov 0x0(%rsp), %rax
	14
	15	/* if(length == 0) : end of list */
	16	/* write possible 0 to header */
	17	mov %rax, 8(%rbx)
	18	cmp $0, %rax
	19	jz done
	20
	21	/* save current pointer */
	22	mov %rsp, 8(%rbx)
	23
	24	/* skip additional data */
	25	add %rax, %rsp
	26
	27	/* load syscall-# */
	28	pop %rax
	29
	30	/* load syscall params */
c5600490 JD	31	pop %rdi
	32	pop %rsi
	33	pop %rdx
	34	pop %r10
	35	pop %r8
	36	pop %r9
07bf731e BS	37
07bf731e BS	38	/* execute syscall */
c5600490	39	syscall
07bf731e BS	40
	41	/* check return value */
	42	pop %rcx
	43	cmp %rcx, %rax
	44	je again
	45
	46	done:
	47	/* save return value */
c5600490	48	mov %rax, (%rbx)
07bf731e BS	49
	50	/* stop */
	51	int3