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ia64: syscall: add some helpful documentation
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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2013-12-29 Mike Frysinger <vapier@gentoo.org>
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* sysdeps/unix/sysv/linux/ia64/syscall.S: Add a comment.
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2013-12-25 Mike Frysinger <vapier@gentoo.org>
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* sysdeps/unix/sysv/linux/ia64/nptl/lowlevellock.h
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@ -19,6 +19,10 @@
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#include <sysdep.h>
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ENTRY(syscall)
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/* We are called like so:
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{out0,out1,...,out6} registers -> {NR, arg1, ..., arg6}
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Shift the register window so that {out1...out6} are available
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in {out0...out5} like the kernel syscall handler expects. */
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alloc r2=ar.pfs,1,0,8,0
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mov r15=r32 /* syscall number */
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break __BREAK_SYSCALL
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