| /* Save and set 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 swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */ |
| |
| LEAF (__swapcontext) |
| mv t0, a1 /* Save ucp into t0. */ |
| |
| 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_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask, _NSIG8) */ |
| li a3, _NSIG8 |
| add a2, a0, UCONTEXT_SIGMASK |
| add a1, t0, UCONTEXT_SIGMASK |
| li a0, SIG_SETMASK |
| |
| li a7, SYS_ify (rt_sigprocmask) |
| scall |
| |
| bltz a0, 99f |
| |
| #ifndef __riscv_float_abi_soft |
| lw t1, MCONTEXT_FSR(t0) |
| |
| RESTORE_FP_REG (fs0, 8, t0) |
| RESTORE_FP_REG (fs1, 9, t0) |
| RESTORE_FP_REG (fs2, 18, t0) |
| RESTORE_FP_REG (fs3, 19, t0) |
| RESTORE_FP_REG (fs4, 20, t0) |
| RESTORE_FP_REG (fs5, 21, t0) |
| RESTORE_FP_REG (fs6, 22, t0) |
| RESTORE_FP_REG (fs7, 23, t0) |
| RESTORE_FP_REG (fs8, 24, t0) |
| RESTORE_FP_REG (fs9, 25, t0) |
| RESTORE_FP_REG (fs10, 26, t0) |
| RESTORE_FP_REG (fs11, 27, t0) |
| |
| fssr t1 |
| #endif /* __riscv_float_abi_soft */ |
| |
| /* Note the contents of argument registers will be random |
| unless makecontext() has been called. */ |
| RESTORE_INT_REG (t1, 0, t0) |
| RESTORE_INT_REG (ra, 1, t0) |
| RESTORE_INT_REG (sp, 2, t0) |
| RESTORE_INT_REG (s0, 8, t0) |
| RESTORE_INT_REG (s1, 9, t0) |
| RESTORE_INT_REG (a0, 10, t0) |
| RESTORE_INT_REG (a1, 11, t0) |
| RESTORE_INT_REG (a2, 12, t0) |
| RESTORE_INT_REG (a3, 13, t0) |
| RESTORE_INT_REG (a4, 14, t0) |
| RESTORE_INT_REG (a5, 15, t0) |
| RESTORE_INT_REG (a6, 16, t0) |
| RESTORE_INT_REG (a7, 17, t0) |
| RESTORE_INT_REG (s2, 18, t0) |
| RESTORE_INT_REG (s3, 19, t0) |
| RESTORE_INT_REG (s4, 20, t0) |
| RESTORE_INT_REG (s5, 21, t0) |
| RESTORE_INT_REG (s6, 22, t0) |
| RESTORE_INT_REG (s7, 23, t0) |
| RESTORE_INT_REG (s8, 24, t0) |
| RESTORE_INT_REG (s9, 25, t0) |
| RESTORE_INT_REG (s10, 26, t0) |
| RESTORE_INT_REG (s11, 27, t0) |
| |
| jr t1 |
| |
| |
| 99: j __syscall_error |
| |
| PSEUDO_END (__swapcontext) |
| |
| weak_alias (__swapcontext, swapcontext) |
