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author | Palmer Dabbelt <palmer@dabbelt.com> | 2018-01-29 10:27:52 -0800 |
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committer | Palmer Dabbelt <palmer@dabbelt.com> | 2018-01-29 10:27:52 -0800 |
commit | 36960f0c763a904d6d1f028e2c33b7bbe43c2a3a (patch) | |
tree | 39c7b6cf706b27b9cf1939a01b4ac73b6202952a /sysdeps/unix/sysv/linux/riscv/sysdep.S | |
parent | d1c09b247130c1aedd11b913f579c7764b1b5ae1 (diff) | |
download | glibc-36960f0c763a904d6d1f028e2c33b7bbe43c2a3a.tar.gz glibc-36960f0c763a904d6d1f028e2c33b7bbe43c2a3a.tar.xz glibc-36960f0c763a904d6d1f028e2c33b7bbe43c2a3a.zip |
RISC-V: Linux Syscall Interface
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.
Diffstat (limited to 'sysdeps/unix/sysv/linux/riscv/sysdep.S')
-rw-r--r-- | sysdeps/unix/sysv/linux/riscv/sysdep.S | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/riscv/sysdep.S b/sysdeps/unix/sysv/linux/riscv/sysdep.S new file mode 100644 index 0000000000..0d9c0b5bd9 --- /dev/null +++ b/sysdeps/unix/sysv/linux/riscv/sysdep.S @@ -0,0 +1,51 @@ +/* syscall error handlers + Copyright (C) 2011-2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#if IS_IN (libc) +# define errno __libc_errno +#endif + +ENTRY (__syscall_error) + mv t0, ra + /* Fall through to __syscall_set_errno. */ +END (__syscall_error) + +/* Non-standard calling convention: argument in a0, return address in t0, + and clobber only t1. */ +ENTRY (__syscall_set_errno) + /* We got here because a0 < 0, but only codes in the range [-4095, -1] + represent errors. Otherwise, just return the result normally. */ + li t1, -4096 + bleu a0, t1, 1f + neg a0, a0 +#if RTLD_PRIVATE_ERRNO + sw a0, rtld_errno, t1 +#elif defined(__PIC__) + la.tls.ie t1, errno + add t1, t1, tp + sw a0, 0(t1) +#else + lui t1, %tprel_hi(errno) + add t1, t1, tp, %tprel_add(errno) + sw a0, %tprel_lo(errno)(t1) +#endif + li a0, -1 +1: jr t0 +END (__syscall_set_errno) |