diff options
| author | Mike Frysinger <vapier@gentoo.org> | 2013-12-29 16:29:02 -0500 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2013-12-29 16:29:27 -0500 |
| commit | 88dd1da188f37a9132230967883ba38c645c6dd9 (patch) | |
| tree | 043ef28a010deb089fa74e51b021a589762aeeed /ports | |
| parent | 11520a57961bb32d8550696add541a4939b35045 (diff) | |
ia64: syscall: add some helpful documentation
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'ports')
| -rw-r--r-- | ports/ChangeLog.ia64 | 4 | ||||
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/ia64/syscall.S | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/ports/ChangeLog.ia64 b/ports/ChangeLog.ia64 index 34391c1311..8e9b24dd42 100644 --- a/ports/ChangeLog.ia64 +++ b/ports/ChangeLog.ia64 @@ -1,3 +1,7 @@ +2013-12-29 Mike Frysinger <vapier@gentoo.org> + + * sysdeps/unix/sysv/linux/ia64/syscall.S: Add a comment. + 2013-12-25 Mike Frysinger <vapier@gentoo.org> * sysdeps/unix/sysv/linux/ia64/nptl/lowlevellock.h diff --git a/ports/sysdeps/unix/sysv/linux/ia64/syscall.S b/ports/sysdeps/unix/sysv/linux/ia64/syscall.S index 8bb77d255c..4cd75b8d4c 100644 --- a/ports/sysdeps/unix/sysv/linux/ia64/syscall.S +++ b/ports/sysdeps/unix/sysv/linux/ia64/syscall.S @@ -19,6 +19,10 @@ #include <sysdep.h> ENTRY(syscall) + /* We are called like so: + {out0,out1,...,out6} registers -> {NR, arg1, ..., arg6} + Shift the register window so that {out1...out6} are available + in {out0...out5} like the kernel syscall handler expects. */ alloc r2=ar.pfs,1,0,8,0 mov r15=r32 /* syscall number */ break __BREAK_SYSCALL |