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/* SPDX-License-Identifier: GPL-2.0 */
#include <as-layout.h>
.section .__syscall_stub, "ax"
.globl batch_syscall_stub
batch_syscall_stub:
/* %rsp has the pointer to first operation */
mov %rsp, %rbx
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
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