| 1 | /* Save current context. C-SKY ABIV2 version. |
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| 2 | Copyright (C) 2018-2024 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 <sysdep.h> |
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| 20 | |
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| 21 | #include "ucontext_i.h" |
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| 22 | |
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| 23 | /* int getcontext (ucontext_t *ucp) */ |
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| 24 | |
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| 25 | ENTRY (__getcontext) |
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| 26 | /* No need to save r2-r7 or a0-a3. */ |
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| 27 | mov t0, a0 |
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| 28 | |
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| 29 | addi a0, MCONTEXT_CSKY_R4 |
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| 30 | |
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| 31 | stm r4-r13, (a0) /* Save r4-r13. */ |
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| 32 | stw sp, (t0, MCONTEXT_CSKY_SP) /* Save sp. */ |
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| 33 | stw r15, (t0, MCONTEXT_CSKY_LR) /* Save lr. */ |
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| 34 | stw r15, (t0, MCONTEXT_CSKY_PC) /* Return to PC. */ |
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| 35 | addi a0, t0, MCONTEXT_CSKY_R16 |
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| 36 | stm r16-r31, (a0) /* Save r16-r31. */ |
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| 37 | movi a0, 0 |
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| 38 | stw a0, (t0, MCONTEXT_CSKY_A0) /* Return zero. */ |
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| 39 | |
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| 40 | subi sp, 8 |
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| 41 | stw t0, (sp, 0) /* Save t0 after "save sp". */ |
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| 42 | |
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| 43 | /* __sigprocmask (SIG_BLOCK, NULL, &(ucontext->uc_sigmask)) */ |
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| 44 | movi a0, SIG_BLOCK |
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| 45 | movi a1, 0 |
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| 46 | addi a2, t0, UCONTEXT_SIGMASK |
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| 47 | |
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| 48 | /* Do sigprocmask syscall. */ |
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| 49 | #ifdef __PIC__ |
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| 50 | subi sp, 8 |
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| 51 | stw gb, (sp, 0) |
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| 52 | grs gb, .Lgetpc |
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| 53 | .Lgetpc: |
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| 54 | lrw a3, .Lgetpc@GOTPC |
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| 55 | addu gb, gb, a3 |
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| 56 | lrw a3, __sigprocmask@PLT |
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| 57 | ldr.w a3, (gb, a3 << 0) |
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| 58 | jsr a3 |
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| 59 | ldw gb, (sp, 0) |
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| 60 | addi sp, 8 |
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| 61 | #else |
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| 62 | jsri __sigprocmask |
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| 63 | #endif |
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| 64 | |
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| 65 | ldw t0, (sp, 0) |
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| 66 | addi sp, 8 |
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| 67 | /* Restore r15 for sigprocmask changes. */ |
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| 68 | ldw r15, (t0, MCONTEXT_CSKY_LR) |
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| 69 | movi a0, 0 /* Return 0. */ |
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| 70 | jmp r15 |
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| 71 | END (__getcontext) |
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| 72 | |
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| 73 | weak_alias (__getcontext, getcontext) |
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| 74 | |
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