1 /* Save and set current context.
2 Copyright (C) 2009 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Maciej W. Rozycki <macro@codesourcery.com>.
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.
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.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library. If not, see
18 <http://www.gnu.org/licenses/>. */
22 #include <sys/fpregdef.h>
23 #include <sys/regdef.h>
25 #include "ucontext_i.h"
27 /* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */
34 LOCALSZ = 1 /* save gp */
36 #if _MIPS_SIM != _ABIO32
37 ARGSZ = 1 /* save a1 */
42 FRAMESZ = (((ARGSZ + LOCALSZ) * SZREG) + ALSZ) & ALMASK
43 GPOFF = FRAMESZ - ((ARGSZ + 1) * SZREG)
44 #if _MIPS_SIM != _ABIO32
45 A1OFF = FRAMESZ - (1 * SZREG) /* callee-allocated */
47 A1OFF = FRAMESZ + (1 * SZREG) /* caller-allocated */
50 NESTED (__swapcontext, FRAMESZ, ra)
51 .mask MASK, -(ARGSZ * SZREG)
60 # if _MIPS_SIM != _ABIO32
65 PTR_ADDIU sp, -FRAMESZ
66 SETUP_GP64 (GPOFF, __swapcontext)
73 #endif /* ! __PIC__ */
82 /* Store a magic flag. */
84 REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */
86 REG_S s0, (16 * SZREG + MCONTEXT_GREGS)(a0)
87 REG_S s1, (17 * SZREG + MCONTEXT_GREGS)(a0)
88 REG_S s2, (18 * SZREG + MCONTEXT_GREGS)(a0)
89 REG_S s3, (19 * SZREG + MCONTEXT_GREGS)(a0)
90 REG_S s4, (20 * SZREG + MCONTEXT_GREGS)(a0)
91 REG_S s5, (21 * SZREG + MCONTEXT_GREGS)(a0)
92 REG_S s6, (22 * SZREG + MCONTEXT_GREGS)(a0)
93 REG_S s7, (23 * SZREG + MCONTEXT_GREGS)(a0)
94 #if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
95 REG_S _GP, (28 * SZREG + MCONTEXT_GREGS)(a0)
97 REG_S _SP, (29 * SZREG + MCONTEXT_GREGS)(a0)
98 REG_S fp, (30 * SZREG + MCONTEXT_GREGS)(a0)
99 REG_S ra, (31 * SZREG + MCONTEXT_GREGS)(a0)
100 REG_S ra, MCONTEXT_PC(a0)
102 #ifdef __mips_hard_float
103 # if _MIPS_SIM == _ABI64
104 s.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(a0)
105 s.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(a0)
106 s.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(a0)
107 s.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(a0)
108 s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
109 s.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(a0)
110 s.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(a0)
111 s.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(a0)
113 # else /* _MIPS_SIM != _ABI64 */
114 s.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(a0)
115 s.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(a0)
116 s.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(a0)
117 s.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(a0)
118 s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
119 s.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(a0)
121 # endif /* _MIPS_SIM != _ABI64 */
124 sw v1, MCONTEXT_FPC_CSR(a0)
125 #endif /* __mips_hard_float */
129 /* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask, _NSIG8) */
131 PTR_ADDU a2, a0, UCONTEXT_SIGMASK
132 PTR_ADDU a1, a1, UCONTEXT_SIGMASK
135 li v0, SYS_ify (rt_sigprocmask)
141 #ifdef __mips_hard_float
142 # if _MIPS_SIM == _ABI64
143 l.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(v0)
144 l.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(v0)
145 l.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(v0)
146 l.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(v0)
147 l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0)
148 l.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(v0)
149 l.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(v0)
150 l.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(v0)
152 # else /* _MIPS_SIM != _ABI64 */
153 l.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(v0)
154 l.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(v0)
155 l.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(v0)
156 l.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(v0)
157 l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0)
158 l.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(v0)
160 # endif /* _MIPS_SIM != _ABI64 */
162 lw v1, MCONTEXT_FPC_CSR(v0)
164 #endif /* __mips_hard_float */
166 /* Note the contents of argument registers will be random
167 unless makecontext() has been called. */
168 REG_L a0, (4 * SZREG + MCONTEXT_GREGS)(v0)
169 REG_L a1, (5 * SZREG + MCONTEXT_GREGS)(v0)
170 REG_L a2, (6 * SZREG + MCONTEXT_GREGS)(v0)
171 REG_L a3, (7 * SZREG + MCONTEXT_GREGS)(v0)
172 #if _MIPS_SIM != _ABIO32
173 REG_L a4, (8 * SZREG + MCONTEXT_GREGS)(v0)
174 REG_L a5, (9 * SZREG + MCONTEXT_GREGS)(v0)
175 REG_L a6, (10 * SZREG + MCONTEXT_GREGS)(v0)
176 REG_L a7, (11 * SZREG + MCONTEXT_GREGS)(v0)
179 REG_L s0, (16 * SZREG + MCONTEXT_GREGS)(v0)
180 REG_L s1, (17 * SZREG + MCONTEXT_GREGS)(v0)
181 REG_L s2, (18 * SZREG + MCONTEXT_GREGS)(v0)
182 REG_L s3, (19 * SZREG + MCONTEXT_GREGS)(v0)
183 REG_L s4, (20 * SZREG + MCONTEXT_GREGS)(v0)
184 REG_L s5, (21 * SZREG + MCONTEXT_GREGS)(v0)
185 REG_L s6, (22 * SZREG + MCONTEXT_GREGS)(v0)
186 REG_L s7, (23 * SZREG + MCONTEXT_GREGS)(v0)
187 #if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
188 REG_L gp, (28 * SZREG + MCONTEXT_GREGS)(v0)
190 REG_L sp, (29 * SZREG + MCONTEXT_GREGS)(v0)
191 REG_L fp, (30 * SZREG + MCONTEXT_GREGS)(v0)
192 REG_L ra, (31 * SZREG + MCONTEXT_GREGS)(v0)
193 REG_L t9, MCONTEXT_PC(v0)
200 PTR_LA t9, JUMPTARGET (__syscall_error)
202 PTR_ADDIU sp, FRAMESZ
205 #else /* ! __PIC__ */
207 j JUMPTARGET (__syscall_error)
208 #endif /* ! __PIC__ */
209 PSEUDO_END (__swapcontext)
211 weak_alias (__swapcontext, swapcontext)