1 /* $NetBSD: cerror.S,v 1.3 2015/03/27 23:23:14 matt Exp $ */
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
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11 * modification, are permitted provided that the following conditions
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14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
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19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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37 #if defined(LIBC_SCCS) && !defined(lint)
38 RCSID("$NetBSD: cerror.S,v 1.3 2015/03/27 23:23:14 matt Exp $")
39 #endif /* LIBC_SCCS and not lint */
41 .protected _C_LABEL(__cerror)
43 .globl _C_LABEL(__errno)
46 addi sp, sp, -CALLFRAME_SIZ
47 REG_S ra, CALLFRAME_RA(sp) # save return address
48 INT_S a0, CALLFRAME_S0(sp) # save errno value
50 call PLT(_C_LABEL(__errno)) # locate address of errno
52 INT_L t0, CALLFRAME_S0(sp) # retrieve errno value
53 REG_L ra, CALLFRAME_RA(sp) # retrieve return address
54 INT_S t0, 0(a0) # update errno value
55 addi sp, sp, CALLFRAME_SIZ
57 aiupc a1, %hi(_C_LABEL(errno))
58 INT_S a0, %lo(_C_LABEL(errno))(a1)
59 #endif /* _REENTRANT */