projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| a86a7a39 | 1 | /* Save current context and install the given one. |
| 2b778ceb | 2 | Copyright (C) 2008-2021 Free Software Foundation, Inc. |
| a86a7a39 | 3 | This file is part of the GNU C Library. |
| a86a7a39 JJ |
4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 59ba27a6 | 16 | License along with the GNU C Library; if not, see |
| 5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
| a86a7a39 JJ |
18 | |
| 19 | #include <sysdep.h> | |
| 20 | #include <sys/trap.h> | |
| 21 | ||
| 22 | #include "ucontext_i.h" | |
| 23 | ||
| 24 | ||
| 25 | /* int __swapcontext (ucontext_t *oucp, const ucontext_t *ucp); | |
| 26 | ||
| 27 | Saves the machine context in oucp such that when it is activated, | |
| 28 | it appears as if __swapcontext() returned again, restores the | |
| 29 | machine context in ucp and thereby resumes execution in that | |
| 30 | context. | |
| 31 | ||
| 32 | This implementation is intended to be used for *synchronous* context | |
| 33 | switches only. Therefore, it does not have to save anything | |
| 34 | other than the PRESERVED state. */ | |
| 35 | ||
| 36 | ENTRY(__swapcontext) | |
| 37 | save %sp, -112, %sp | |
| 38 | ta ST_FLUSH_WINDOWS | |
| 39 | st %g0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_PSR] | |
| 40 | add %i7, 8, %o0 | |
| 41 | st %o0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_PC] | |
| 42 | add %o0, 4, %o0 | |
| 43 | st %o0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_NPC] | |
| 44 | rd %y, %o1 | |
| 45 | st %o1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_Y] | |
| 46 | st %g1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G1] | |
| 47 | st %g2, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G2] | |
| 48 | st %g3, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G3] | |
| 49 | st %g4, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G4] | |
| 50 | st %g5, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G5] | |
| 51 | st %g6, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G6] | |
| 52 | st %g7, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G7] | |
| 53 | st %g0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O0] | |
| 54 | st %i1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O1] | |
| 55 | st %i2, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O2] | |
| 56 | st %i3, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O3] | |
| 57 | st %i4, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O4] | |
| 58 | st %i5, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O5] | |
| 59 | st %i6, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O6] | |
| 60 | st %i7, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O7] | |
| 61 | st %g0, [%i0 + UC_MCONTEXT + MC_GWINS] | |
| 62 | stb %g0, [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_EN] | |
| 63 | st %g0, [%i0 + UC_MCONTEXT + MC_XRS + XRS_ID] | |
| 64 | st %g0, [%i0 + UC_MCONTEXT + MC_XRS + XRS_PTR] | |
| 65 | ||
| 66 | mov SIG_SETMASK, %o0 | |
| 67 | add %i1, UC_SIGMASK, %o1 | |
| 68 | add %i0, UC_SIGMASK, %o2 | |
| 69 | mov 8, %o3 | |
| 70 | mov __NR_rt_sigprocmask, %g1 | |
| 71 | ta 0x10 | |
| 72 | ||
| 73 | mov %i1, %i0 | |
| 74 | ldub [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_EN], %g1 | |
| 75 | cmp %g1, 0 | |
| 76 | be 1f | |
| 77 | nop | |
| 78 | ld [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_FSR], %fsr | |
| 79 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D0], %f0 | |
| 80 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D2], %f2 | |
| 81 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D4], %f4 | |
| 82 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D6], %f6 | |
| 83 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D8], %f8 | |
| 84 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D10], %f10 | |
| 85 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D12], %f12 | |
| 86 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D14], %f14 | |
| 87 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D16], %f16 | |
| 88 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D18], %f18 | |
| 89 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D20], %f20 | |
| 90 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D22], %f22 | |
| 91 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D24], %f24 | |
| 92 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D26], %f26 | |
| 93 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D28], %f28 | |
| 94 | ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D30], %f30 | |
| 95 | 1: | |
| 96 | ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_Y], %g1 | |
| 97 | wr %g1, 0x0, %y | |
| 98 | ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G2], %g2 | |
| 99 | ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G3], %g3 | |
| 100 | ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G4], %g4 | |
| 101 | ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G5], %g5 | |
| 102 | ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G6], %g6 | |
| 103 | ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G7], %g7 | |
| 104 | ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O1], %i1 | |
| 105 | ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O2], %i2 | |
| 106 | ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O3], %i3 | |
| 107 | ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O4], %i4 | |
| 108 | ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O5], %i5 | |
| 109 | ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O6], %i6 | |
| 110 | restore | |
| 111 | ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_O7], %o7 | |
| 112 | ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_PC], %g1 | |
| 113 | jmpl %g1, %g0 | |
| 114 | ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_O0], %o0 | |
| 115 | END(__swapcontext) | |
| 116 | ||
| 117 | weak_alias (__swapcontext, swapcontext) |