2 * Emulation of Linux signals
4 * Copyright (c) 2003 Fabrice Bellard
5 * Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, see <http://www.gnu.org/licenses/>.
20 #include "qemu/osdep.h"
22 #include "signal-common.h"
23 #include "linux-user/trace.h"
25 struct target_sigcontext
{
26 target_ulong r0
, r1
, r2
, r3
;
27 target_ulong r4
, r5
, r6
, r7
;
28 target_ulong r8
, r9
, r10
, r11
;
29 target_ulong r12
, r13
, r14
, r15
;
30 target_ulong r16
, r17
, r18
, r19
;
31 target_ulong r20
, r21
, r22
, r23
;
32 target_ulong r24
, r25
, r26
, r27
;
33 target_ulong r28
, r29
, r30
, r31
;
52 struct target_ucontext
{
53 unsigned long uc_flags
;
54 target_ulong uc_link
; /* target pointer */
55 target_stack_t uc_stack
;
56 struct target_sigcontext uc_mcontext
;
57 target_sigset_t uc_sigmask
;
60 struct target_rt_sigframe
{
62 struct target_siginfo info
;
63 struct target_ucontext uc
;
66 static abi_ulong
get_sigframe(struct target_sigaction
*ka
,
67 CPUHexagonState
*regs
, size_t framesize
)
69 abi_ulong sp
= get_sp_from_cpustate(regs
);
71 /* This is the X/Open sanctioned signal stack switching. */
72 sp
= target_sigsp(sp
, ka
) - framesize
;
74 sp
= QEMU_ALIGN_DOWN(sp
, 8);
79 static void setup_sigcontext(struct target_sigcontext
*sc
, CPUHexagonState
*env
)
81 __put_user(env
->gpr
[HEX_REG_R00
], &sc
->r0
);
82 __put_user(env
->gpr
[HEX_REG_R01
], &sc
->r1
);
83 __put_user(env
->gpr
[HEX_REG_R02
], &sc
->r2
);
84 __put_user(env
->gpr
[HEX_REG_R03
], &sc
->r3
);
85 __put_user(env
->gpr
[HEX_REG_R04
], &sc
->r4
);
86 __put_user(env
->gpr
[HEX_REG_R05
], &sc
->r5
);
87 __put_user(env
->gpr
[HEX_REG_R06
], &sc
->r6
);
88 __put_user(env
->gpr
[HEX_REG_R07
], &sc
->r7
);
89 __put_user(env
->gpr
[HEX_REG_R08
], &sc
->r8
);
90 __put_user(env
->gpr
[HEX_REG_R09
], &sc
->r9
);
91 __put_user(env
->gpr
[HEX_REG_R10
], &sc
->r10
);
92 __put_user(env
->gpr
[HEX_REG_R11
], &sc
->r11
);
93 __put_user(env
->gpr
[HEX_REG_R12
], &sc
->r12
);
94 __put_user(env
->gpr
[HEX_REG_R13
], &sc
->r13
);
95 __put_user(env
->gpr
[HEX_REG_R14
], &sc
->r14
);
96 __put_user(env
->gpr
[HEX_REG_R15
], &sc
->r15
);
97 __put_user(env
->gpr
[HEX_REG_R16
], &sc
->r16
);
98 __put_user(env
->gpr
[HEX_REG_R17
], &sc
->r17
);
99 __put_user(env
->gpr
[HEX_REG_R18
], &sc
->r18
);
100 __put_user(env
->gpr
[HEX_REG_R19
], &sc
->r19
);
101 __put_user(env
->gpr
[HEX_REG_R20
], &sc
->r20
);
102 __put_user(env
->gpr
[HEX_REG_R21
], &sc
->r21
);
103 __put_user(env
->gpr
[HEX_REG_R22
], &sc
->r22
);
104 __put_user(env
->gpr
[HEX_REG_R23
], &sc
->r23
);
105 __put_user(env
->gpr
[HEX_REG_R24
], &sc
->r24
);
106 __put_user(env
->gpr
[HEX_REG_R25
], &sc
->r25
);
107 __put_user(env
->gpr
[HEX_REG_R26
], &sc
->r26
);
108 __put_user(env
->gpr
[HEX_REG_R27
], &sc
->r27
);
109 __put_user(env
->gpr
[HEX_REG_R28
], &sc
->r28
);
110 __put_user(env
->gpr
[HEX_REG_R29
], &sc
->r29
);
111 __put_user(env
->gpr
[HEX_REG_R30
], &sc
->r30
);
112 __put_user(env
->gpr
[HEX_REG_R31
], &sc
->r31
);
113 __put_user(env
->gpr
[HEX_REG_SA0
], &sc
->sa0
);
114 __put_user(env
->gpr
[HEX_REG_LC0
], &sc
->lc0
);
115 __put_user(env
->gpr
[HEX_REG_SA1
], &sc
->sa1
);
116 __put_user(env
->gpr
[HEX_REG_LC1
], &sc
->lc1
);
117 __put_user(env
->gpr
[HEX_REG_M0
], &sc
->m0
);
118 __put_user(env
->gpr
[HEX_REG_M1
], &sc
->m1
);
119 __put_user(env
->gpr
[HEX_REG_USR
], &sc
->usr
);
120 __put_user(env
->gpr
[HEX_REG_P3_0
], &sc
->p3_0
);
121 __put_user(env
->gpr
[HEX_REG_GP
], &sc
->gp
);
122 __put_user(env
->gpr
[HEX_REG_UGP
], &sc
->ugp
);
123 __put_user(env
->gpr
[HEX_REG_PC
], &sc
->pc
);
126 static void setup_ucontext(struct target_ucontext
*uc
,
127 CPUHexagonState
*env
, target_sigset_t
*set
)
129 __put_user(0, &(uc
->uc_flags
));
130 __put_user(0, &(uc
->uc_link
));
132 target_save_altstack(&uc
->uc_stack
, env
);
135 for (i
= 0; i
< TARGET_NSIG_WORDS
; i
++) {
136 __put_user(set
->sig
[i
], &(uc
->uc_sigmask
.sig
[i
]));
139 setup_sigcontext(&uc
->uc_mcontext
, env
);
142 static inline void install_sigtramp(uint32_t *tramp
)
144 __put_user(0x7800d166, tramp
+ 0); /* { r6=#__NR_rt_sigreturn } */
145 __put_user(0x5400c004, tramp
+ 1); /* { trap0(#1) } */
148 void setup_rt_frame(int sig
, struct target_sigaction
*ka
,
149 target_siginfo_t
*info
,
150 target_sigset_t
*set
, CPUHexagonState
*env
)
152 abi_ulong frame_addr
;
153 struct target_rt_sigframe
*frame
;
155 frame_addr
= get_sigframe(ka
, env
, sizeof(*frame
));
156 trace_user_setup_rt_frame(env
, frame_addr
);
158 if (!lock_user_struct(VERIFY_WRITE
, frame
, frame_addr
, 0)) {
162 setup_ucontext(&frame
->uc
, env
, set
);
163 tswap_siginfo(&frame
->info
, info
);
164 install_sigtramp(frame
->tramp
);
166 env
->gpr
[HEX_REG_PC
] = ka
->_sa_handler
;
167 env
->gpr
[HEX_REG_SP
] = frame_addr
;
168 env
->gpr
[HEX_REG_R00
] = sig
;
169 env
->gpr
[HEX_REG_R01
] =
170 frame_addr
+ offsetof(struct target_rt_sigframe
, info
);
171 env
->gpr
[HEX_REG_R02
] =
172 frame_addr
+ offsetof(struct target_rt_sigframe
, uc
);
173 env
->gpr
[HEX_REG_LR
] =
174 frame_addr
+ offsetof(struct target_rt_sigframe
, tramp
);
179 unlock_user_struct(frame
, frame_addr
, 1);
180 if (sig
== TARGET_SIGSEGV
) {
181 ka
->_sa_handler
= TARGET_SIG_DFL
;
183 force_sig(TARGET_SIGSEGV
);
186 static void restore_sigcontext(CPUHexagonState
*env
,
187 struct target_sigcontext
*sc
)
189 __get_user(env
->gpr
[HEX_REG_R00
], &sc
->r0
);
190 __get_user(env
->gpr
[HEX_REG_R01
], &sc
->r1
);
191 __get_user(env
->gpr
[HEX_REG_R02
], &sc
->r2
);
192 __get_user(env
->gpr
[HEX_REG_R03
], &sc
->r3
);
193 __get_user(env
->gpr
[HEX_REG_R04
], &sc
->r4
);
194 __get_user(env
->gpr
[HEX_REG_R05
], &sc
->r5
);
195 __get_user(env
->gpr
[HEX_REG_R06
], &sc
->r6
);
196 __get_user(env
->gpr
[HEX_REG_R07
], &sc
->r7
);
197 __get_user(env
->gpr
[HEX_REG_R08
], &sc
->r8
);
198 __get_user(env
->gpr
[HEX_REG_R09
], &sc
->r9
);
199 __get_user(env
->gpr
[HEX_REG_R10
], &sc
->r10
);
200 __get_user(env
->gpr
[HEX_REG_R11
], &sc
->r11
);
201 __get_user(env
->gpr
[HEX_REG_R12
], &sc
->r12
);
202 __get_user(env
->gpr
[HEX_REG_R13
], &sc
->r13
);
203 __get_user(env
->gpr
[HEX_REG_R14
], &sc
->r14
);
204 __get_user(env
->gpr
[HEX_REG_R15
], &sc
->r15
);
205 __get_user(env
->gpr
[HEX_REG_R16
], &sc
->r16
);
206 __get_user(env
->gpr
[HEX_REG_R17
], &sc
->r17
);
207 __get_user(env
->gpr
[HEX_REG_R18
], &sc
->r18
);
208 __get_user(env
->gpr
[HEX_REG_R19
], &sc
->r19
);
209 __get_user(env
->gpr
[HEX_REG_R20
], &sc
->r20
);
210 __get_user(env
->gpr
[HEX_REG_R21
], &sc
->r21
);
211 __get_user(env
->gpr
[HEX_REG_R22
], &sc
->r22
);
212 __get_user(env
->gpr
[HEX_REG_R23
], &sc
->r23
);
213 __get_user(env
->gpr
[HEX_REG_R24
], &sc
->r24
);
214 __get_user(env
->gpr
[HEX_REG_R25
], &sc
->r25
);
215 __get_user(env
->gpr
[HEX_REG_R26
], &sc
->r26
);
216 __get_user(env
->gpr
[HEX_REG_R27
], &sc
->r27
);
217 __get_user(env
->gpr
[HEX_REG_R28
], &sc
->r28
);
218 __get_user(env
->gpr
[HEX_REG_R29
], &sc
->r29
);
219 __get_user(env
->gpr
[HEX_REG_R30
], &sc
->r30
);
220 __get_user(env
->gpr
[HEX_REG_R31
], &sc
->r31
);
221 __get_user(env
->gpr
[HEX_REG_SA0
], &sc
->sa0
);
222 __get_user(env
->gpr
[HEX_REG_LC0
], &sc
->lc0
);
223 __get_user(env
->gpr
[HEX_REG_SA1
], &sc
->sa1
);
224 __get_user(env
->gpr
[HEX_REG_LC1
], &sc
->lc1
);
225 __get_user(env
->gpr
[HEX_REG_M0
], &sc
->m0
);
226 __get_user(env
->gpr
[HEX_REG_M1
], &sc
->m1
);
227 __get_user(env
->gpr
[HEX_REG_USR
], &sc
->usr
);
228 __get_user(env
->gpr
[HEX_REG_P3_0
], &sc
->p3_0
);
229 __get_user(env
->gpr
[HEX_REG_GP
], &sc
->gp
);
230 __get_user(env
->gpr
[HEX_REG_UGP
], &sc
->ugp
);
231 __get_user(env
->gpr
[HEX_REG_PC
], &sc
->pc
);
234 static void restore_ucontext(CPUHexagonState
*env
, struct target_ucontext
*uc
)
237 target_sigset_t target_set
;
240 target_sigemptyset(&target_set
);
241 for (i
= 0; i
< TARGET_NSIG_WORDS
; i
++) {
242 __get_user(target_set
.sig
[i
], &(uc
->uc_sigmask
.sig
[i
]));
245 target_to_host_sigset_internal(&blocked
, &target_set
);
246 set_sigmask(&blocked
);
248 restore_sigcontext(env
, &uc
->uc_mcontext
);
251 long do_rt_sigreturn(CPUHexagonState
*env
)
253 struct target_rt_sigframe
*frame
;
254 abi_ulong frame_addr
;
256 frame_addr
= env
->gpr
[HEX_REG_SP
];
257 trace_user_do_sigreturn(env
, frame_addr
);
258 if (!lock_user_struct(VERIFY_READ
, frame
, frame_addr
, 1)) {
262 restore_ucontext(env
, &frame
->uc
);
264 if (do_sigaltstack(frame_addr
+ offsetof(struct target_rt_sigframe
,
265 uc
.uc_stack
), 0, get_sp_from_cpustate(env
)) == -EFAULT
) {
269 unlock_user_struct(frame
, frame_addr
, 0);
270 return -TARGET_QEMU_ESIGRETURN
;
273 unlock_user_struct(frame
, frame_addr
, 0);
274 force_sig(TARGET_SIGSEGV
);