52 lines
795 B
ArmAsm
52 lines
795 B
ArmAsm
/* 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
|