50 lines
779 B
ArmAsm
50 lines
779 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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#include <as-layout.h>
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.section .__syscall_stub, "ax"
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.globl batch_syscall_stub
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batch_syscall_stub:
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/* %rsp has the pointer to first operation */
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mov %rsp, %rbx
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add $0x10, %rsp
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again:
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/* load length of additional data */
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mov 0x0(%rsp), %rax
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/* if(length == 0) : end of list */
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/* write possible 0 to header */
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mov %rax, 8(%rbx)
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cmp $0, %rax
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jz done
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/* save current pointer */
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mov %rsp, 8(%rbx)
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/* skip additional data */
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add %rax, %rsp
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/* load syscall-# */
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pop %rax
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/* load syscall params */
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pop %rdi
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pop %rsi
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pop %rdx
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pop %r10
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pop %r8
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pop %r9
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/* execute syscall */
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syscall
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/* check return value */
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pop %rcx
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cmp %rcx, %rax
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je again
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done:
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/* save return value */
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mov %rax, (%rbx)
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/* stop */
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int3
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