66 lines
1.7 KiB
ArmAsm
66 lines
1.7 KiB
ArmAsm
/* syscall error handlers. C-SKY ABIV2 version.
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Copyright (C) 2018 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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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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/* The syscall stubs jump here when they detect an error.
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The code for Linux is almost identical to the canonical Unix
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code, except that the error number in R0 is negated. */
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#undef CALL_MCOUNT
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#define CALL_MCOUNT /* Don't insert the profiling call, it clobbers R0. */
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.text
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ENTRY (__syscall_error)
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movi a1, 0
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rsub a0, a0, a1
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#if !IS_IN (rtld)
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mov a1, a0
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mov a0, tls
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grs t1, .Lgetpc1
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.Lgetpc1:
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lrw t0, errno@gottpoff
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add t1, t1, t0
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ldw t1, (t1)
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add t1, a0
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stw a1, (t1)
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bmaski a0, 0
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rts
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#elif RTLD_PRIVATE_ERRNO /* !IS_IN (rtld) */
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# ifdef __PIC__
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grs t1, .Lgetpc2
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.Lgetpc2:
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lrw t0, .Lgetpc2@GOTPC
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addu t1, t1, t0
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lrw t0, rtld_errno@PLT
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ldr.w t0, (t1, t0 << 0)
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# else
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lrw t0, rtld_errno
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# endif /* __PIC__ */
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stw a0, (t0)
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bmaski a0, 0
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rts
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#else
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# error "Unsupported non-TLS case"
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#endif /* RTLD_PRIVATE_ERRNO */
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#undef __syscall_error
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END (__syscall_error)
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