diff options
Diffstat (limited to 'src/thread/x86_64/clone.s')
| -rw-r--r-- | src/thread/x86_64/clone.s | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/thread/x86_64/clone.s b/src/thread/x86_64/clone.s new file mode 100644 index 00000000..51410051 --- /dev/null +++ b/src/thread/x86_64/clone.s @@ -0,0 +1,22 @@ +/* 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 $16,%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) */ + test %rax,%rax + jnz 1f /* if we're in the parent -> goto 1f */ + pop %rdi /* restore pthread_struct from child stack */ +1: ret +.size __uniclone,.-__uniclone |