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/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
.text
.global __uniclone
.type __uniclone,@function
/* rdi = child_stack, rsi = start, rdx = pthread_struct */
__uniclone:
subq $8,%rsp /* pad parent stack to prevent branch later */
subq $24,%rdi /* grow child_stack */
mov %rsi,8(%rdi) /* push start onto child_stack as return ptr */
mov %rdx,0(%rdi) /* push pthread_struct onto child_stack */
mov %rdx,%r8 /* r8 = tls */
mov %rdi,%rsi /* rsi = child_stack */
leaq 40(%rdx),%r10 /* r10 = child_id */
movl $56,%eax /* clone syscall number */
movl $0x7d0f00,%edi /* rdi = flags */
mov %r10,%rdx /* rdx = parent_id */
syscall /* clone(flags, child_stack, parent_id,
* child_id, tls) */
pop %rdi /* child stack: restore pthread_struct
* parent stack: undo rsp displacement */
ret
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