23 lines
1.1 KiB
ArmAsm
23 lines
1.1 KiB
ArmAsm
/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
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.text
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.global __uniclone
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.type __uniclone,%function
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/* rdi = child_stack, rsi = start, rdx = pthread_struct */
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__uniclone:
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subq $8,%rsp /* pad parent stack to prevent branch later */
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subq $16,%rdi /* grow child_stack */
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mov %rsi,8(%rdi) /* push start onto child_stack as return ptr */
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mov %rdx,0(%rdi) /* push pthread_struct onto child_stack */
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mov %rdx,%r8 /* r8 = tls */
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mov %rdi,%rsi /* rsi = child_stack */
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leaq 40(%rdx),%r10 /* r10 = child_id */
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movl $56,%eax /* clone syscall number */
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movl $0x7d0f00,%edi /* rdi = flags */
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mov %r10,%rdx /* rdx = parent_id */
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syscall /* clone(flags, child_stack, parent_id,
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* child_id, tls) */
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pop %rdi /* child stack: restore pthread_struct
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* parent stack: undo rsp displacement */
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ret
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.size __uniclone,.-__uniclone
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