| 1 | /* Save current context. |
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| 2 | Copyright (C) 2009-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library. If not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include "ucontext-macros.h" |
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| 20 | |
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| 21 | /* int getcontext (ucontext_t *ucp) */ |
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| 22 | |
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| 23 | .text |
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| 24 | LEAF (__getcontext) |
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| 25 | SAVE_INT_REG (ra, 0, a0) |
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| 26 | SAVE_INT_REG (ra, 1, a0) |
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| 27 | SAVE_INT_REG (sp, 2, a0) |
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| 28 | SAVE_INT_REG (s0, 8, a0) |
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| 29 | SAVE_INT_REG (s1, 9, a0) |
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| 30 | SAVE_INT_REG (x0, 10, a0) /* return 0 by overwriting a0. */ |
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| 31 | SAVE_INT_REG (s2, 18, a0) |
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| 32 | SAVE_INT_REG (s3, 19, a0) |
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| 33 | SAVE_INT_REG (s4, 20, a0) |
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| 34 | SAVE_INT_REG (s5, 21, a0) |
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| 35 | SAVE_INT_REG (s6, 22, a0) |
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| 36 | SAVE_INT_REG (s7, 23, a0) |
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| 37 | SAVE_INT_REG (s8, 24, a0) |
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| 38 | SAVE_INT_REG (s9, 25, a0) |
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| 39 | SAVE_INT_REG (s10, 26, a0) |
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| 40 | SAVE_INT_REG (s11, 27, a0) |
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| 41 | |
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| 42 | #ifndef __riscv_float_abi_soft |
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| 43 | frsr a1 |
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| 44 | |
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| 45 | SAVE_FP_REG (fs0, 8, a0) |
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| 46 | SAVE_FP_REG (fs1, 9, a0) |
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| 47 | SAVE_FP_REG (fs2, 18, a0) |
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| 48 | SAVE_FP_REG (fs3, 19, a0) |
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| 49 | SAVE_FP_REG (fs4, 20, a0) |
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| 50 | SAVE_FP_REG (fs5, 21, a0) |
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| 51 | SAVE_FP_REG (fs6, 22, a0) |
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| 52 | SAVE_FP_REG (fs7, 23, a0) |
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| 53 | SAVE_FP_REG (fs8, 24, a0) |
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| 54 | SAVE_FP_REG (fs9, 25, a0) |
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| 55 | SAVE_FP_REG (fs10, 26, a0) |
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| 56 | SAVE_FP_REG (fs11, 27, a0) |
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| 57 | |
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| 58 | sw a1, MCONTEXT_FSR(a0) |
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| 59 | #endif /* __riscv_float_abi_soft */ |
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| 60 | |
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| 61 | /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */ |
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| 62 | li a3, _NSIG8 |
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| 63 | add a2, a0, UCONTEXT_SIGMASK |
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| 64 | mv a1, zero |
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| 65 | li a0, SIG_BLOCK |
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| 66 | |
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| 67 | li a7, SYS_ify (rt_sigprocmask) |
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| 68 | scall |
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| 69 | bltz a0, 99f |
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| 70 | |
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| 71 | ret |
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| 72 | |
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| 73 | 99: j __syscall_error |
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| 74 | |
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| 75 | PSEUDO_END (__getcontext) |
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| 76 | |
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| 77 | weak_alias (__getcontext, getcontext) |
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| 78 | |
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