Add G_GNUC_PRINTF to function qemu_set_info_str and fix related issues
[qemu.git] / linux-user / hexagon / signal.c
1 /*
2 * Emulation of Linux signals
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 * Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
6 *
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.
11 *
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.
16 *
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/>.
19 */
20 #include "qemu/osdep.h"
21 #include "qemu.h"
22 #include "user-internals.h"
23 #include "signal-common.h"
24 #include "linux-user/trace.h"
25
26 struct target_sigcontext {
27 target_ulong r0, r1, r2, r3;
28 target_ulong r4, r5, r6, r7;
29 target_ulong r8, r9, r10, r11;
30 target_ulong r12, r13, r14, r15;
31 target_ulong r16, r17, r18, r19;
32 target_ulong r20, r21, r22, r23;
33 target_ulong r24, r25, r26, r27;
34 target_ulong r28, r29, r30, r31;
35 target_ulong sa0;
36 target_ulong lc0;
37 target_ulong sa1;
38 target_ulong lc1;
39 target_ulong m0;
40 target_ulong m1;
41 target_ulong usr;
42 target_ulong p3_0;
43 target_ulong gp;
44 target_ulong ugp;
45 target_ulong pc;
46 target_ulong cause;
47 target_ulong badva;
48 target_ulong pad1;
49 target_ulong pad2;
50 target_ulong pad3;
51 };
52
53 struct target_ucontext {
54 unsigned long uc_flags;
55 target_ulong uc_link; /* target pointer */
56 target_stack_t uc_stack;
57 struct target_sigcontext uc_mcontext;
58 target_sigset_t uc_sigmask;
59 };
60
61 struct target_rt_sigframe {
62 uint32_t tramp[2];
63 struct target_siginfo info;
64 struct target_ucontext uc;
65 };
66
67 static abi_ulong get_sigframe(struct target_sigaction *ka,
68 CPUHexagonState *regs, size_t framesize)
69 {
70 abi_ulong sp = get_sp_from_cpustate(regs);
71
72 /* This is the X/Open sanctioned signal stack switching. */
73 sp = target_sigsp(sp, ka) - framesize;
74
75 sp = QEMU_ALIGN_DOWN(sp, 8);
76
77 return sp;
78 }
79
80 static void setup_sigcontext(struct target_sigcontext *sc, CPUHexagonState *env)
81 {
82 __put_user(env->gpr[HEX_REG_R00], &sc->r0);
83 __put_user(env->gpr[HEX_REG_R01], &sc->r1);
84 __put_user(env->gpr[HEX_REG_R02], &sc->r2);
85 __put_user(env->gpr[HEX_REG_R03], &sc->r3);
86 __put_user(env->gpr[HEX_REG_R04], &sc->r4);
87 __put_user(env->gpr[HEX_REG_R05], &sc->r5);
88 __put_user(env->gpr[HEX_REG_R06], &sc->r6);
89 __put_user(env->gpr[HEX_REG_R07], &sc->r7);
90 __put_user(env->gpr[HEX_REG_R08], &sc->r8);
91 __put_user(env->gpr[HEX_REG_R09], &sc->r9);
92 __put_user(env->gpr[HEX_REG_R10], &sc->r10);
93 __put_user(env->gpr[HEX_REG_R11], &sc->r11);
94 __put_user(env->gpr[HEX_REG_R12], &sc->r12);
95 __put_user(env->gpr[HEX_REG_R13], &sc->r13);
96 __put_user(env->gpr[HEX_REG_R14], &sc->r14);
97 __put_user(env->gpr[HEX_REG_R15], &sc->r15);
98 __put_user(env->gpr[HEX_REG_R16], &sc->r16);
99 __put_user(env->gpr[HEX_REG_R17], &sc->r17);
100 __put_user(env->gpr[HEX_REG_R18], &sc->r18);
101 __put_user(env->gpr[HEX_REG_R19], &sc->r19);
102 __put_user(env->gpr[HEX_REG_R20], &sc->r20);
103 __put_user(env->gpr[HEX_REG_R21], &sc->r21);
104 __put_user(env->gpr[HEX_REG_R22], &sc->r22);
105 __put_user(env->gpr[HEX_REG_R23], &sc->r23);
106 __put_user(env->gpr[HEX_REG_R24], &sc->r24);
107 __put_user(env->gpr[HEX_REG_R25], &sc->r25);
108 __put_user(env->gpr[HEX_REG_R26], &sc->r26);
109 __put_user(env->gpr[HEX_REG_R27], &sc->r27);
110 __put_user(env->gpr[HEX_REG_R28], &sc->r28);
111 __put_user(env->gpr[HEX_REG_R29], &sc->r29);
112 __put_user(env->gpr[HEX_REG_R30], &sc->r30);
113 __put_user(env->gpr[HEX_REG_R31], &sc->r31);
114 __put_user(env->gpr[HEX_REG_SA0], &sc->sa0);
115 __put_user(env->gpr[HEX_REG_LC0], &sc->lc0);
116 __put_user(env->gpr[HEX_REG_SA1], &sc->sa1);
117 __put_user(env->gpr[HEX_REG_LC1], &sc->lc1);
118 __put_user(env->gpr[HEX_REG_M0], &sc->m0);
119 __put_user(env->gpr[HEX_REG_M1], &sc->m1);
120 __put_user(env->gpr[HEX_REG_USR], &sc->usr);
121 __put_user(env->gpr[HEX_REG_P3_0], &sc->p3_0);
122 __put_user(env->gpr[HEX_REG_GP], &sc->gp);
123 __put_user(env->gpr[HEX_REG_UGP], &sc->ugp);
124 __put_user(env->gpr[HEX_REG_PC], &sc->pc);
125 }
126
127 static void setup_ucontext(struct target_ucontext *uc,
128 CPUHexagonState *env, target_sigset_t *set)
129 {
130 __put_user(0, &(uc->uc_flags));
131 __put_user(0, &(uc->uc_link));
132
133 target_save_altstack(&uc->uc_stack, env);
134
135 int i;
136 for (i = 0; i < TARGET_NSIG_WORDS; i++) {
137 __put_user(set->sig[i], &(uc->uc_sigmask.sig[i]));
138 }
139
140 setup_sigcontext(&uc->uc_mcontext, env);
141 }
142
143 static inline void install_sigtramp(uint32_t *tramp)
144 {
145 __put_user(0x7800d166, tramp + 0); /* { r6=#__NR_rt_sigreturn } */
146 __put_user(0x5400c004, tramp + 1); /* { trap0(#1) } */
147 }
148
149 void setup_rt_frame(int sig, struct target_sigaction *ka,
150 target_siginfo_t *info,
151 target_sigset_t *set, CPUHexagonState *env)
152 {
153 abi_ulong frame_addr;
154 struct target_rt_sigframe *frame;
155
156 frame_addr = get_sigframe(ka, env, sizeof(*frame));
157 trace_user_setup_rt_frame(env, frame_addr);
158
159 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
160 goto badframe;
161 }
162
163 setup_ucontext(&frame->uc, env, set);
164 tswap_siginfo(&frame->info, info);
165 /*
166 * The on-stack signal trampoline is no longer executed;
167 * however, the libgcc signal frame unwinding code checks
168 * for the presence of these two numeric magic values.
169 */
170 install_sigtramp(frame->tramp);
171
172 env->gpr[HEX_REG_PC] = ka->_sa_handler;
173 env->gpr[HEX_REG_SP] = frame_addr;
174 env->gpr[HEX_REG_R00] = sig;
175 env->gpr[HEX_REG_R01] =
176 frame_addr + offsetof(struct target_rt_sigframe, info);
177 env->gpr[HEX_REG_R02] =
178 frame_addr + offsetof(struct target_rt_sigframe, uc);
179 env->gpr[HEX_REG_LR] = default_rt_sigreturn;
180
181 return;
182
183 badframe:
184 unlock_user_struct(frame, frame_addr, 1);
185 if (sig == TARGET_SIGSEGV) {
186 ka->_sa_handler = TARGET_SIG_DFL;
187 }
188 force_sig(TARGET_SIGSEGV);
189 }
190
191 static void restore_sigcontext(CPUHexagonState *env,
192 struct target_sigcontext *sc)
193 {
194 __get_user(env->gpr[HEX_REG_R00], &sc->r0);
195 __get_user(env->gpr[HEX_REG_R01], &sc->r1);
196 __get_user(env->gpr[HEX_REG_R02], &sc->r2);
197 __get_user(env->gpr[HEX_REG_R03], &sc->r3);
198 __get_user(env->gpr[HEX_REG_R04], &sc->r4);
199 __get_user(env->gpr[HEX_REG_R05], &sc->r5);
200 __get_user(env->gpr[HEX_REG_R06], &sc->r6);
201 __get_user(env->gpr[HEX_REG_R07], &sc->r7);
202 __get_user(env->gpr[HEX_REG_R08], &sc->r8);
203 __get_user(env->gpr[HEX_REG_R09], &sc->r9);
204 __get_user(env->gpr[HEX_REG_R10], &sc->r10);
205 __get_user(env->gpr[HEX_REG_R11], &sc->r11);
206 __get_user(env->gpr[HEX_REG_R12], &sc->r12);
207 __get_user(env->gpr[HEX_REG_R13], &sc->r13);
208 __get_user(env->gpr[HEX_REG_R14], &sc->r14);
209 __get_user(env->gpr[HEX_REG_R15], &sc->r15);
210 __get_user(env->gpr[HEX_REG_R16], &sc->r16);
211 __get_user(env->gpr[HEX_REG_R17], &sc->r17);
212 __get_user(env->gpr[HEX_REG_R18], &sc->r18);
213 __get_user(env->gpr[HEX_REG_R19], &sc->r19);
214 __get_user(env->gpr[HEX_REG_R20], &sc->r20);
215 __get_user(env->gpr[HEX_REG_R21], &sc->r21);
216 __get_user(env->gpr[HEX_REG_R22], &sc->r22);
217 __get_user(env->gpr[HEX_REG_R23], &sc->r23);
218 __get_user(env->gpr[HEX_REG_R24], &sc->r24);
219 __get_user(env->gpr[HEX_REG_R25], &sc->r25);
220 __get_user(env->gpr[HEX_REG_R26], &sc->r26);
221 __get_user(env->gpr[HEX_REG_R27], &sc->r27);
222 __get_user(env->gpr[HEX_REG_R28], &sc->r28);
223 __get_user(env->gpr[HEX_REG_R29], &sc->r29);
224 __get_user(env->gpr[HEX_REG_R30], &sc->r30);
225 __get_user(env->gpr[HEX_REG_R31], &sc->r31);
226 __get_user(env->gpr[HEX_REG_SA0], &sc->sa0);
227 __get_user(env->gpr[HEX_REG_LC0], &sc->lc0);
228 __get_user(env->gpr[HEX_REG_SA1], &sc->sa1);
229 __get_user(env->gpr[HEX_REG_LC1], &sc->lc1);
230 __get_user(env->gpr[HEX_REG_M0], &sc->m0);
231 __get_user(env->gpr[HEX_REG_M1], &sc->m1);
232 __get_user(env->gpr[HEX_REG_USR], &sc->usr);
233 __get_user(env->gpr[HEX_REG_P3_0], &sc->p3_0);
234 __get_user(env->gpr[HEX_REG_GP], &sc->gp);
235 __get_user(env->gpr[HEX_REG_UGP], &sc->ugp);
236 __get_user(env->gpr[HEX_REG_PC], &sc->pc);
237 }
238
239 static void restore_ucontext(CPUHexagonState *env, struct target_ucontext *uc)
240 {
241 sigset_t blocked;
242 target_sigset_t target_set;
243 int i;
244
245 target_sigemptyset(&target_set);
246 for (i = 0; i < TARGET_NSIG_WORDS; i++) {
247 __get_user(target_set.sig[i], &(uc->uc_sigmask.sig[i]));
248 }
249
250 target_to_host_sigset_internal(&blocked, &target_set);
251 set_sigmask(&blocked);
252
253 restore_sigcontext(env, &uc->uc_mcontext);
254 }
255
256 long do_rt_sigreturn(CPUHexagonState *env)
257 {
258 struct target_rt_sigframe *frame;
259 abi_ulong frame_addr;
260
261 frame_addr = env->gpr[HEX_REG_SP];
262 trace_user_do_sigreturn(env, frame_addr);
263 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
264 goto badframe;
265 }
266
267 restore_ucontext(env, &frame->uc);
268 target_restore_altstack(&frame->uc.uc_stack, env);
269
270 unlock_user_struct(frame, frame_addr, 0);
271 return -QEMU_ESIGRETURN;
272
273 badframe:
274 unlock_user_struct(frame, frame_addr, 0);
275 force_sig(TARGET_SIGSEGV);
276 return 0;
277 }
278
279 void setup_sigtramp(abi_ulong sigtramp_page)
280 {
281 uint32_t *tramp = lock_user(VERIFY_WRITE, sigtramp_page, 4 * 2, 0);
282 assert(tramp != NULL);
283
284 default_rt_sigreturn = sigtramp_page;
285 install_sigtramp(tramp);
286
287 unlock_user(tramp, sigtramp_page, 4 * 2);
288 }