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5232b909bf
Factor out the sequence needed to call kuser_get_tls, as we can't play subtract into pc games in thumb mode. Prepare for hard-tp, pulling the save of LR into the macro.
64 lines
1.7 KiB
ArmAsm
64 lines
1.7 KiB
ArmAsm
/* Copyright (C) 1991-2013 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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#define _ERRNO_H
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#include <bits/errno.h>
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#ifdef IS_IN_rtld
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# include <dl-sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */
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#endif
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#include <tls.h>
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#undef syscall_error
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__syscall_error:
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#if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
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/* We translate the system's EWOULDBLOCK error into EAGAIN.
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The GNU C library always defines EWOULDBLOCK==EAGAIN.
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EWOULDBLOCK_sys is the original number. */
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cmp r0, $EWOULDBLOCK_sys /* Is it the old EWOULDBLOCK? */
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it eq
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moveq r0, $EAGAIN /* Yes; translate it to EAGAIN. */
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#endif
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#ifndef IS_IN_rtld
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mov r1, r0
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GET_TLS (r2)
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ldr r2, 1f
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#ifdef __thumb__
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2: add r2, r2, pc
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ldr r2, [r2]
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#else
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2: ldr r2, [pc, r2]
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#endif
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str r1, [r0, r2]
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mvn r0, #0
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DO_RET(lr)
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1: .word errno(gottpoff) + (. - 2b - PC_OFS)
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#elif RTLD_PRIVATE_ERRNO
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LDST_PCREL(str, r0, r1, C_SYMBOL_NAME(rtld_errno))
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mvn r0, #0
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DO_RET(r14)
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#else
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#error "Unsupported non-TLS case"
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#endif
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#undef __syscall_error
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END (__syscall_error)
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