| /* Save current context. |
| Copyright (C) 2009-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Maciej W. Rozycki <macro@codesourcery.com>. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdep.h> |
| #include <sys/asm.h> |
| #include <sys/fpregdef.h> |
| #include <sys/regdef.h> |
| |
| #include "ucontext_i.h" |
| |
| /* int getcontext (ucontext_t *ucp) */ |
| |
| .text |
| .set nomips16 |
| LOCALSZ = 0 |
| MASK = 0x00000000 |
| #ifdef __PIC__ |
| LOCALSZ = 1 /* save gp */ |
| # if _MIPS_SIM != _ABIO32 |
| MASK = 0x10000000 |
| # endif |
| #endif |
| FRAMESZ = ((LOCALSZ * SZREG) + ALSZ) & ALMASK |
| GPOFF = FRAMESZ - (1 * SZREG) |
| |
| NESTED (__getcontext, FRAMESZ, ra) |
| .mask MASK, 0 |
| .fmask 0x00000000, 0 |
| |
| #ifdef __PIC__ |
| SETUP_GP |
| |
| move a2, sp |
| # define _SP a2 |
| |
| # if _MIPS_SIM != _ABIO32 |
| move a3, gp |
| # define _GP a3 |
| # endif |
| |
| PTR_ADDIU sp, -FRAMESZ |
| cfi_adjust_cfa_offset (FRAMESZ) |
| SETUP_GP64_STACK (GPOFF, __getcontext) |
| SAVE_GP (GPOFF) |
| |
| #else /* ! __PIC__ */ |
| # define _SP sp |
| # define _GP gp |
| |
| #endif /* ! __PIC__ */ |
| |
| #ifdef PROF |
| .set noat |
| move AT, ra |
| jal _mcount |
| .set at |
| #endif |
| |
| /* Store a magic flag. */ |
| li v1, 1 |
| REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */ |
| |
| REG_S s0, (16 * SZREG + MCONTEXT_GREGS)(a0) |
| REG_S s1, (17 * SZREG + MCONTEXT_GREGS)(a0) |
| REG_S s2, (18 * SZREG + MCONTEXT_GREGS)(a0) |
| REG_S s3, (19 * SZREG + MCONTEXT_GREGS)(a0) |
| REG_S s4, (20 * SZREG + MCONTEXT_GREGS)(a0) |
| REG_S s5, (21 * SZREG + MCONTEXT_GREGS)(a0) |
| REG_S s6, (22 * SZREG + MCONTEXT_GREGS)(a0) |
| REG_S s7, (23 * SZREG + MCONTEXT_GREGS)(a0) |
| #if ! defined (__PIC__) || _MIPS_SIM != _ABIO32 |
| REG_S _GP, (28 * SZREG + MCONTEXT_GREGS)(a0) |
| #endif |
| REG_S _SP, (29 * SZREG + MCONTEXT_GREGS)(a0) |
| REG_S fp, (30 * SZREG + MCONTEXT_GREGS)(a0) |
| REG_S ra, (31 * SZREG + MCONTEXT_GREGS)(a0) |
| REG_S ra, MCONTEXT_PC(a0) |
| |
| #ifdef __mips_hard_float |
| # if _MIPS_SIM == _ABI64 |
| s.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(a0) |
| s.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(a0) |
| s.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(a0) |
| s.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(a0) |
| s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0) |
| s.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(a0) |
| s.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(a0) |
| s.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(a0) |
| |
| # else /* _MIPS_SIM != _ABI64 */ |
| s.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(a0) |
| s.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(a0) |
| s.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(a0) |
| s.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(a0) |
| s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0) |
| s.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(a0) |
| |
| # endif /* _MIPS_SIM != _ABI64 */ |
| |
| cfc1 v1, fcr31 |
| sw v1, MCONTEXT_FPC_CSR(a0) |
| #endif /* __mips_hard_float */ |
| |
| /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */ |
| li a3, _NSIG8 |
| PTR_ADDU a2, a0, UCONTEXT_SIGMASK |
| move a1, zero |
| li a0, SIG_BLOCK |
| |
| li v0, SYS_ify (rt_sigprocmask) |
| syscall |
| bnez a3, 99f |
| cfi_remember_state |
| |
| #ifdef __PIC__ |
| RESTORE_GP64_STACK |
| PTR_ADDIU sp, FRAMESZ |
| cfi_adjust_cfa_offset (-FRAMESZ) |
| #endif |
| move v0, zero |
| jr ra |
| |
| 99: |
| cfi_restore_state |
| #ifdef __PIC__ |
| PTR_LA t9, JUMPTARGET (__syscall_error) |
| RESTORE_GP64_STACK |
| PTR_ADDIU sp, FRAMESZ |
| cfi_adjust_cfa_offset (-FRAMESZ) |
| jr t9 |
| |
| #else /* ! __PIC__ */ |
| |
| j JUMPTARGET (__syscall_error) |
| #endif /* ! __PIC__ */ |
| PSEUDO_END (__getcontext) |
| |
| weak_alias (__getcontext, getcontext) |