1/* Set current context. 2 Copyright (C) 2009-2022 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 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 16 License along with the GNU C Library. If not, see 17 <https://www.gnu.org/licenses/>. */ 18 19#include <sysdep.h> 20#include <sys/asm.h> 21#include <sys/fpregdef.h> 22#include <sys/regdef.h> 23 24#include "ucontext_i.h" 25 26/* int setcontext (const ucontext_t *ucp) */ 27 28 .text 29 .set nomips16 30LOCALSZ = 0 31ARGSZ = 0 32MASK = 0x00000000 33#ifdef __PIC__ 34LOCALSZ = 1 /* save gp */ 35#endif 36#if _MIPS_SIM != _ABIO32 37ARGSZ = 1 /* save a0 */ 38# ifdef __PIC__ 39MASK = 0x10000000 40# endif 41#endif 42FRAMESZ = (((ARGSZ + LOCALSZ) * SZREG) + ALSZ) & ALMASK 43GPOFF = FRAMESZ - ((ARGSZ + 1) * SZREG) 44#if _MIPS_SIM != _ABIO32 45A0OFF = FRAMESZ - (1 * SZREG) /* callee-allocated */ 46#else 47A0OFF = FRAMESZ + (0 * SZREG) /* caller-allocated */ 48#endif 49MCONTEXT_GREGSZ = 8 50#if _MIPS_SIM == _ABIO32 && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 51MCONTEXT_GREGOFF = 4 52#else 53MCONTEXT_GREGOFF = 0 54#endif 55 56NESTED (__setcontext, FRAMESZ, ra) 57 .mask MASK, -(ARGSZ * SZREG) 58 .fmask 0x00000000, 0 59 60#ifdef __PIC__ 61 SETUP_GP 62#endif 63 64 PTR_ADDIU sp, -FRAMESZ 65 cfi_adjust_cfa_offset (FRAMESZ) 66 67#ifdef __PIC__ 68 SETUP_GP64_STACK (GPOFF, __setcontext) 69 SAVE_GP (GPOFF) 70#endif 71 72#ifdef PROF 73 .set noat 74 move AT, ra 75 jal _mcount 76 .set at 77#endif 78 79 REG_S a0, A0OFF(sp) 80 81/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, NULL, _NSIG8) */ 82 li a3, _NSIG8 83 move a2, zero 84 PTR_ADDU a1, a0, UCONTEXT_SIGMASK 85 li a0, SIG_SETMASK 86 87 li v0, SYS_ify (rt_sigprocmask) 88 syscall 89 bnez a3, 99f 90 91 REG_L v0, A0OFF(sp) 92 93#ifdef __mips_hard_float 94# if _MIPS_SIM == _ABI64 95 l.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(v0) 96 l.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(v0) 97 l.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(v0) 98 l.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(v0) 99 l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0) 100 l.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(v0) 101 l.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(v0) 102 l.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(v0) 103 104# else /* _MIPS_SIM != _ABI64 */ 105 l.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(v0) 106 l.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(v0) 107 l.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(v0) 108 l.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(v0) 109 l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0) 110 l.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(v0) 111 112# endif /* _MIPS_SIM != _ABI64 */ 113 114 lw v1, MCONTEXT_FPC_CSR(v0) 115 ctc1 v1, fcr31 116#endif /* __mips_hard_float */ 117 118 /* Note the contents of argument registers will be random 119 unless makecontext() has been called. */ 120 REG_L a0, (MCONTEXT_GREGOFF + 4 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 121 REG_L a1, (MCONTEXT_GREGOFF + 5 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 122 REG_L a2, (MCONTEXT_GREGOFF + 6 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 123 REG_L a3, (MCONTEXT_GREGOFF + 7 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 124#if _MIPS_SIM != _ABIO32 125 REG_L a4, (MCONTEXT_GREGOFF + 8 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 126 REG_L a5, (MCONTEXT_GREGOFF + 9 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 127 REG_L a6, (MCONTEXT_GREGOFF + 10 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 128 REG_L a7, (MCONTEXT_GREGOFF + 11 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 129#endif 130 131 REG_L s0, (MCONTEXT_GREGOFF + 16 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 132 REG_L s1, (MCONTEXT_GREGOFF + 17 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 133 REG_L s2, (MCONTEXT_GREGOFF + 18 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 134 REG_L s3, (MCONTEXT_GREGOFF + 19 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 135 REG_L s4, (MCONTEXT_GREGOFF + 20 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 136 REG_L s5, (MCONTEXT_GREGOFF + 21 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 137 REG_L s6, (MCONTEXT_GREGOFF + 22 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 138 REG_L s7, (MCONTEXT_GREGOFF + 23 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 139#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32 140 REG_L gp, (MCONTEXT_GREGOFF + 28 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 141#endif 142 REG_L sp, (MCONTEXT_GREGOFF + 29 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 143 REG_L fp, (MCONTEXT_GREGOFF + 30 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 144 REG_L ra, (MCONTEXT_GREGOFF + 31 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0) 145 REG_L t9, (MCONTEXT_GREGOFF + MCONTEXT_PC)(v0) 146 147 move v0, zero 148 jr t9 149 15099: 151#ifdef __PIC__ 152 PTR_LA t9, JUMPTARGET (__syscall_error) 153 RESTORE_GP64_STACK 154 PTR_ADDIU sp, FRAMESZ 155 cfi_adjust_cfa_offset (-FRAMESZ) 156 jr t9 157 158#else /* ! __PIC__ */ 159 160 j JUMPTARGET (__syscall_error) 161#endif /* ! __PIC__ */ 162PSEUDO_END (__setcontext) 163 164weak_alias (__setcontext, setcontext) 165