2013-05-07 23:48:48 +00:00
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#
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! $Source: /cvsroot/tack/Ack/plat/linux386/libsys/_syscall.s,v $
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! $State: Exp $
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! $Revision: 1.1 $
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! Declare segments (the order is important).
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.sect .text
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.sect .rom
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.sect .data
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.sect .bss
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.sect .text
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2018-01-12 01:04:27 +00:00
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#define EINVAL 22
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2013-05-07 23:48:48 +00:00
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! Perform a Linux system call.
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.define __syscall
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__syscall:
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lwz r0, 0(sp)
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lwz r3, 4(sp)
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lwz r4, 8(sp)
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lwz r5, 12(sp)
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sc 0
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2018-01-12 01:04:27 +00:00
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bnslr
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2013-05-07 23:48:48 +00:00
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! On error, r3 contains the errno.
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! It just so happens that errnos 1-34 are the same in Linux as in ACK.
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2018-01-12 01:04:27 +00:00
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cmpwi r3, 1
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blt 2f
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cmpwi r3, 34
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bgt 2f
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2013-05-07 23:48:48 +00:00
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3:
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2018-01-12 01:04:27 +00:00
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lis r4, ha16[_errno]
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stw r3, lo16[_errno](r4)
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li r3, -1
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blr
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2013-05-07 23:48:48 +00:00
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2:
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2018-01-12 01:04:27 +00:00
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li r3, EINVAL
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2013-05-07 23:48:48 +00:00
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b 3b
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