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Last active Dec 16, 2015
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How to set %gs base on Darwin
# _seems_ to make %gs base point to address in %rdi
# on x86-64 Darwin
# (what would be amd64_set_gsbase on FreeBSD, or
# arch_prctl with ARCH_SET_GS on Linux)
# Could find exacty zero documentation on this!
movl $0x3000003, %eax;
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