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54 lines
1.5 KiB
ArmAsm
54 lines
1.5 KiB
ArmAsm
/* syscall error handlers
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Copyright (C) 2022-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#if IS_IN (libc)
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# define errno __libc_errno
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#endif
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ENTRY (__syscall_error)
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/* Fall through to __syscall_set_errno */
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END (__syscall_error)
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/* Non-standard calling convention: argument in a0, return address in t0,
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and clobber only t1.
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*/
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ENTRY (__syscall_set_errno)
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/* We got here because a0 < 0, but only codes in the range [-4095, -1]
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represent errors. Otherwise, just return the result normally.
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*/
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li.d t1, -4096
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bgeu t1, a0, L (out)
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sub.w a0, zero, a0
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#if RTLD_PRIVATE_ERRNO
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la t1, rtld_errno
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#elif defined(__PIC__)
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la.tls.ie t1, errno
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add.d t1, tp, t1
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#else
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la.tls.le t1, errno
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add.d t1, tp, t1
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#endif
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st.w a0, t1, 0
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li.d a0, -1
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L (out):
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ret
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END (__syscall_set_errno)
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