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36960f0c76
Contains the Linux system call interface, as well as the definitions of
a handful of system calls.
2018-01-29 Palmer Dabbelt <palmer@sifive.com>
* sysdeps/riscv/nptl/nptl-sysdep.S: New file.
* sysdeps/unix/sysv/linux/riscv/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/clone.S: Likewise.
* sysdeps/unix/sysv/linux/riscv/profil-counter.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/pt-vfork.S: Likewise.
* sysdeps/unix/sysv/linux/riscv/syscall.c: Likewise.
* sysdeps/unix/sysv/linux/riscv/sysdep.S: Likewise.
* sysdeps/unix/sysv/linux/riscv/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/vfork.S: Likewise.
52 lines
1.5 KiB
ArmAsm
52 lines
1.5 KiB
ArmAsm
/* syscall error handlers
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Copyright (C) 2011-2018 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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#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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mv t0, ra
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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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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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li t1, -4096
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bleu a0, t1, 1f
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neg a0, a0
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#if RTLD_PRIVATE_ERRNO
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sw a0, rtld_errno, t1
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#elif defined(__PIC__)
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la.tls.ie t1, errno
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add t1, t1, tp
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sw a0, 0(t1)
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#else
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lui t1, %tprel_hi(errno)
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add t1, t1, tp, %tprel_add(errno)
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sw a0, %tprel_lo(errno)(t1)
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#endif
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li a0, -1
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1: jr t0
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END (__syscall_set_errno)
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