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author | Palmer Dabbelt <palmer@dabbelt.com> | 2018-01-29 10:28:32 -0800 |
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committer | Palmer Dabbelt <palmer@dabbelt.com> | 2018-01-29 10:37:27 -0800 |
commit | 7f33b09c65e3fdb6b6a1af8816918bcce977b38a (patch) | |
tree | 820a99249081334d21f7a4eb7fa621c05d2337ca /sysdeps/unix/sysv/linux/riscv/getcontext.S | |
parent | 36960f0c763a904d6d1f028e2c33b7bbe43c2a3a (diff) | |
download | glibc-7f33b09c65e3fdb6b6a1af8816918bcce977b38a.tar.gz glibc-7f33b09c65e3fdb6b6a1af8816918bcce977b38a.tar.xz glibc-7f33b09c65e3fdb6b6a1af8816918bcce977b38a.zip |
RISC-V: Linux ABI
Linux-specific code that is required for maintaining ABI compatibility. This doesn't contain the actual system call interface, that is split out in order to avoid having a patch that's too big. 2018-01-29 Palmer Dabbelt <palmer@sifive.com> * sysdeps/riscv/nptl/pthread-offsets.h: New file. * sysdeps/riscv/nptl/pthreaddef.h: Likewise. * sysdeps/unix/sysv/linux/riscv/bits/fcntl.h: Likewise. * sysdeps/unix/sysv/linux/riscv/bits/mman.h: Likewise. * sysdeps/unix/sysv/linux/riscv/bits/sigcontext.h: Likewise. * sysdeps/unix/sysv/linux/riscv/dl-cache.h: Likewise. * sysdeps/unix/sysv/linux/riscv/flush-icache.c: Likewise. * sysdeps/unix/sysv/linux/riscv/getcontext.S: Likewise. * sysdeps/unix/sysv/linux/riscv/init-first.c: Likewise. * sysdeps/unix/sysv/linux/riscv/libc-vdso.h: Likewise. * sysdeps/unix/sysv/linux/riscv/makecontext.c: Likewise. * sysdeps/unix/sysv/linux/riscv/readelflib.c: Likewise. * sysdeps/unix/sysv/linux/riscv/register-dump.h: Likewise. * sysdeps/unix/sysv/linux/riscv/setcontext.S: Likewise. * sysdeps/unix/sysv/linux/riscv/sigcontextinfo.h: Likewise. * sysdeps/unix/sysv/linux/riscv/swapcontext.S: Likewise. * sysdeps/unix/sysv/linux/riscv/sys/cachectl.h: Likewise. * sysdeps/unix/sysv/linux/riscv/sys/procfs.h: Likewise. * sysdeps/unix/sysv/linux/riscv/sys/ucontext.h: Likewise. * sysdeps/unix/sysv/linux/riscv/sys/user.h: Likewise. * sysdeps/unix/sysv/linux/riscv/ucontext-macros.h: Likewise. * sysdeps/unix/sysv/linux/riscv/ucontext_i.sym: Likewise.
Diffstat (limited to 'sysdeps/unix/sysv/linux/riscv/getcontext.S')
-rw-r--r-- | sysdeps/unix/sysv/linux/riscv/getcontext.S | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/riscv/getcontext.S b/sysdeps/unix/sysv/linux/riscv/getcontext.S new file mode 100644 index 0000000000..bde350f721 --- /dev/null +++ b/sysdeps/unix/sysv/linux/riscv/getcontext.S @@ -0,0 +1,77 @@ +/* Save current context. + Copyright (C) 2009-2018 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 "ucontext-macros.h" + +/* int getcontext (ucontext_t *ucp) */ + + .text +LEAF (__getcontext) + SAVE_INT_REG (ra, 0, a0) + SAVE_INT_REG (ra, 1, a0) + SAVE_INT_REG (sp, 2, a0) + SAVE_INT_REG (s0, 8, a0) + SAVE_INT_REG (s1, 9, a0) + SAVE_INT_REG (x0, 10, a0) /* return 0 by overwriting a0. */ + SAVE_INT_REG (s2, 18, a0) + SAVE_INT_REG (s3, 19, a0) + SAVE_INT_REG (s4, 20, a0) + SAVE_INT_REG (s5, 21, a0) + SAVE_INT_REG (s6, 22, a0) + SAVE_INT_REG (s7, 23, a0) + SAVE_INT_REG (s8, 24, a0) + SAVE_INT_REG (s9, 25, a0) + SAVE_INT_REG (s10, 26, a0) + SAVE_INT_REG (s11, 27, a0) + +#ifndef __riscv_float_abi_soft + frsr a1 + + SAVE_FP_REG (fs0, 8, a0) + SAVE_FP_REG (fs1, 9, a0) + SAVE_FP_REG (fs2, 18, a0) + SAVE_FP_REG (fs3, 19, a0) + SAVE_FP_REG (fs4, 20, a0) + SAVE_FP_REG (fs5, 21, a0) + SAVE_FP_REG (fs6, 22, a0) + SAVE_FP_REG (fs7, 23, a0) + SAVE_FP_REG (fs8, 24, a0) + SAVE_FP_REG (fs9, 25, a0) + SAVE_FP_REG (fs10, 26, a0) + SAVE_FP_REG (fs11, 27, a0) + + sw a1, MCONTEXT_FSR(a0) +#endif /* __riscv_float_abi_soft */ + +/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */ + li a3, _NSIG8 + add a2, a0, UCONTEXT_SIGMASK + mv a1, zero + li a0, SIG_BLOCK + + li a7, SYS_ify (rt_sigprocmask) + scall + bltz a0, 99f + + ret + +99: j __syscall_error + +PSEUDO_END (__getcontext) + +weak_alias (__getcontext, getcontext) |