projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| ff347533 | 1 | /* Save current context. |
| d4697bc9 | 2 | Copyright (C) 2009-2014 Free Software Foundation, Inc. |
| ff347533 JM |
3 | This file is part of the GNU C Library. |
| 4 | Contributed by Maciej W. Rozycki <macro@codesourcery.com>. | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 7 | modify it under the terms of the GNU Lesser General Public | |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| 10 | ||
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | Lesser General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Lesser General Public | |
| ab84e3ff PE |
17 | License along with the GNU C Library. If not, see |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| ff347533 JM |
19 | |
| 20 | #include <sysdep.h> | |
| 21 | #include <sys/asm.h> | |
| 22 | #include <sys/fpregdef.h> | |
| 23 | #include <sys/regdef.h> | |
| 24 | ||
| 25 | #include "ucontext_i.h" | |
| 26 | ||
| 27 | /* int getcontext (ucontext_t *ucp) */ | |
| 28 | ||
| 29 | .text | |
| 43301bd3 | 30 | .set nomips16 |
| ff347533 JM |
31 | LOCALSZ = 0 |
| 32 | MASK = 0x00000000 | |
| 33 | #ifdef __PIC__ | |
| 34 | LOCALSZ = 1 /* save gp */ | |
| 35 | # if _MIPS_SIM != _ABIO32 | |
| 36 | MASK = 0x10000000 | |
| 37 | # endif | |
| 38 | #endif | |
| 39 | FRAMESZ = ((LOCALSZ * SZREG) + ALSZ) & ALMASK | |
| 40 | GPOFF = FRAMESZ - (1 * SZREG) | |
| 41 | ||
| 42 | NESTED (__getcontext, FRAMESZ, ra) | |
| 43 | .mask MASK, 0 | |
| 44 | .fmask 0x00000000, 0 | |
| 45 | ||
| 46 | #ifdef __PIC__ | |
| 47 | SETUP_GP | |
| 48 | ||
| 49 | move a2, sp | |
| 50 | # define _SP a2 | |
| 51 | ||
| 52 | # if _MIPS_SIM != _ABIO32 | |
| 53 | move a3, gp | |
| 54 | # define _GP a3 | |
| 55 | # endif | |
| 56 | ||
| 57 | PTR_ADDIU sp, -FRAMESZ | |
| aea7a9b9 JM |
58 | cfi_adjust_cfa_offset (FRAMESZ) |
| 59 | SETUP_GP64_STACK (GPOFF, __getcontext) | |
| ff347533 JM |
60 | SAVE_GP (GPOFF) |
| 61 | ||
| 62 | #else /* ! __PIC__ */ | |
| 63 | # define _SP sp | |
| 64 | # define _GP gp | |
| 65 | ||
| 66 | #endif /* ! __PIC__ */ | |
| 67 | ||
| 68 | #ifdef PROF | |
| 69 | .set noat | |
| 70 | move AT, ra | |
| 71 | jal _mcount | |
| 72 | .set at | |
| 73 | #endif | |
| 74 | ||
| 75 | /* Store a magic flag. */ | |
| 76 | li v1, 1 | |
| 77 | REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */ | |
| 78 | ||
| 79 | REG_S s0, (16 * SZREG + MCONTEXT_GREGS)(a0) | |
| 80 | REG_S s1, (17 * SZREG + MCONTEXT_GREGS)(a0) | |
| 81 | REG_S s2, (18 * SZREG + MCONTEXT_GREGS)(a0) | |
| 82 | REG_S s3, (19 * SZREG + MCONTEXT_GREGS)(a0) | |
| 83 | REG_S s4, (20 * SZREG + MCONTEXT_GREGS)(a0) | |
| 84 | REG_S s5, (21 * SZREG + MCONTEXT_GREGS)(a0) | |
| 85 | REG_S s6, (22 * SZREG + MCONTEXT_GREGS)(a0) | |
| 86 | REG_S s7, (23 * SZREG + MCONTEXT_GREGS)(a0) | |
| 87 | #if ! defined (__PIC__) || _MIPS_SIM != _ABIO32 | |
| 88 | REG_S _GP, (28 * SZREG + MCONTEXT_GREGS)(a0) | |
| 89 | #endif | |
| 90 | REG_S _SP, (29 * SZREG + MCONTEXT_GREGS)(a0) | |
| 91 | REG_S fp, (30 * SZREG + MCONTEXT_GREGS)(a0) | |
| 92 | REG_S ra, (31 * SZREG + MCONTEXT_GREGS)(a0) | |
| 93 | REG_S ra, MCONTEXT_PC(a0) | |
| 94 | ||
| 95 | #ifdef __mips_hard_float | |
| 96 | # if _MIPS_SIM == _ABI64 | |
| 97 | s.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(a0) | |
| 98 | s.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(a0) | |
| 99 | s.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(a0) | |
| 100 | s.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(a0) | |
| 101 | s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0) | |
| 102 | s.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(a0) | |
| 103 | s.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(a0) | |
| 104 | s.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(a0) | |
| 105 | ||
| 106 | # else /* _MIPS_SIM != _ABI64 */ | |
| 107 | s.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(a0) | |
| 108 | s.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(a0) | |
| 109 | s.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(a0) | |
| 110 | s.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(a0) | |
| 111 | s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0) | |
| 112 | s.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(a0) | |
| 113 | ||
| 114 | # endif /* _MIPS_SIM != _ABI64 */ | |
| 115 | ||
| 116 | cfc1 v1, fcr31 | |
| 117 | sw v1, MCONTEXT_FPC_CSR(a0) | |
| 118 | #endif /* __mips_hard_float */ | |
| 119 | ||
| 120 | /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */ | |
| 121 | li a3, _NSIG8 | |
| 122 | PTR_ADDU a2, a0, UCONTEXT_SIGMASK | |
| 123 | move a1, zero | |
| 124 | li a0, SIG_BLOCK | |
| 125 | ||
| 126 | li v0, SYS_ify (rt_sigprocmask) | |
| 127 | syscall | |
| 128 | bnez a3, 99f | |
| aea7a9b9 | 129 | cfi_remember_state |
| ff347533 JM |
130 | |
| 131 | #ifdef __PIC__ | |
| aea7a9b9 | 132 | RESTORE_GP64_STACK |
| ff347533 | 133 | PTR_ADDIU sp, FRAMESZ |
| aea7a9b9 | 134 | cfi_adjust_cfa_offset (-FRAMESZ) |
| ff347533 JM |
135 | #endif |
| 136 | move v0, zero | |
| 137 | jr ra | |
| 138 | ||
| 139 | 99: | |
| aea7a9b9 | 140 | cfi_restore_state |
| ff347533 JM |
141 | #ifdef __PIC__ |
| 142 | PTR_LA t9, JUMPTARGET (__syscall_error) | |
| aea7a9b9 | 143 | RESTORE_GP64_STACK |
| ff347533 | 144 | PTR_ADDIU sp, FRAMESZ |
| aea7a9b9 | 145 | cfi_adjust_cfa_offset (-FRAMESZ) |
| ff347533 JM |
146 | jr t9 |
| 147 | ||
| 148 | #else /* ! __PIC__ */ | |
| 149 | ||
| 150 | j JUMPTARGET (__syscall_error) | |
| 151 | #endif /* ! __PIC__ */ | |
| 152 | PSEUDO_END (__getcontext) | |
| 153 | ||
| 154 | weak_alias (__getcontext, getcontext) |