1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* SunOS's execv() call only specifies 2 /* SunOS's execv() call only specifies the argv argument, the
3 * environment settings are the same a 3 * environment settings are the same as the calling processes.
4 */ 4 */
5 sys64_execve: 5 sys64_execve:
6 set sys_execve, %g1 6 set sys_execve, %g1
7 jmpl %g1, %g0 7 jmpl %g1, %g0
8 flushw 8 flushw
9 9
10 sys64_execveat: 10 sys64_execveat:
11 set sys_execveat, %g1 11 set sys_execveat, %g1
12 jmpl %g1, %g0 12 jmpl %g1, %g0
13 flushw 13 flushw
14 14
15 #ifdef CONFIG_COMPAT 15 #ifdef CONFIG_COMPAT
16 sunos_execv: 16 sunos_execv:
17 mov %g0, %o2 17 mov %g0, %o2
18 sys32_execve: 18 sys32_execve:
19 set compat_sys_execve, %g1 19 set compat_sys_execve, %g1
20 jmpl %g1, %g0 20 jmpl %g1, %g0
21 flushw 21 flushw
22 22
23 sys32_execveat: 23 sys32_execveat:
24 set compat_sys_execveat, %g1 24 set compat_sys_execveat, %g1
25 jmpl %g1, %g0 25 jmpl %g1, %g0
26 flushw 26 flushw
27 #endif 27 #endif
28 28
29 .align 32 29 .align 32
30 #ifdef CONFIG_COMPAT 30 #ifdef CONFIG_COMPAT
31 sys32_sigstack: 31 sys32_sigstack:
32 ba,pt %xcc, do_sys32_sigstack 32 ba,pt %xcc, do_sys32_sigstack
33 mov %i6, %o2 33 mov %i6, %o2
34 #endif 34 #endif
35 .align 32 35 .align 32
36 #ifdef CONFIG_COMPAT 36 #ifdef CONFIG_COMPAT
37 sys32_sigreturn: 37 sys32_sigreturn:
38 add %sp, PTREGS_OFF, %o0 38 add %sp, PTREGS_OFF, %o0
39 call do_sigreturn32 39 call do_sigreturn32
40 add %o7, 1f-.-4, %o7 40 add %o7, 1f-.-4, %o7
41 nop 41 nop
42 #endif 42 #endif
43 sys_rt_sigreturn: 43 sys_rt_sigreturn:
44 add %sp, PTREGS_OFF, %o0 44 add %sp, PTREGS_OFF, %o0
45 call do_rt_sigreturn 45 call do_rt_sigreturn
46 add %o7, 1f-.-4, %o7 46 add %o7, 1f-.-4, %o7
47 nop 47 nop
48 #ifdef CONFIG_COMPAT 48 #ifdef CONFIG_COMPAT
49 sys32_rt_sigreturn: 49 sys32_rt_sigreturn:
50 add %sp, PTREGS_OFF, %o0 50 add %sp, PTREGS_OFF, %o0
51 call do_rt_sigreturn32 51 call do_rt_sigreturn32
52 add %o7, 1f-.-4, %o7 52 add %o7, 1f-.-4, %o7
53 nop 53 nop
54 #endif 54 #endif
55 .align 32 55 .align 32
56 1: ldx [%g6 + TI_FLAGS], %l5 56 1: ldx [%g6 + TI_FLAGS], %l5
57 andcc %l5, (_TIF_SYSCALL_TRACE|_TIF_ 57 andcc %l5, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
58 be,pt %icc, rtrap 58 be,pt %icc, rtrap
59 nop 59 nop
60 call syscall_trace_leave 60 call syscall_trace_leave
61 add %sp, PTREGS_OFF, %o0 61 add %sp, PTREGS_OFF, %o0
62 ba,pt %xcc, rtrap 62 ba,pt %xcc, rtrap
63 nop 63 nop
64 64
65 /* This is how fork() was meant to be 65 /* This is how fork() was meant to be done, 8 instruction entry.
66 * 66 *
67 * I questioned the following code bri 67 * I questioned the following code briefly, let me clear things
68 * up so you must not reason on it lik 68 * up so you must not reason on it like I did.
69 * 69 *
70 * Know the fork_kpsr etc. we use in t 70 * Know the fork_kpsr etc. we use in the sparc32 port? We don't
71 * need it here because the only piece 71 * need it here because the only piece of window state we copy to
72 * the child is the CWP register. Eve 72 * the child is the CWP register. Even if the parent sleeps,
73 * we are safe because we stuck it int 73 * we are safe because we stuck it into pt_regs of the parent
74 * so it will not change. 74 * so it will not change.
75 * 75 *
76 * XXX This raises the question, wheth 76 * XXX This raises the question, whether we can do the same on
77 * XXX sparc32 to get rid of fork_kpsr 77 * XXX sparc32 to get rid of fork_kpsr _and_ fork_kwim. The
78 * XXX answer is yes. We stick fork_k 78 * XXX answer is yes. We stick fork_kpsr in UREG_G0 and
79 * XXX fork_kwim in UREG_G1 (global re 79 * XXX fork_kwim in UREG_G1 (global registers are considered
80 * XXX volatile across a system call i 80 * XXX volatile across a system call in the sparc ABI I think
81 * XXX if it isn't we can use regs->y 81 * XXX if it isn't we can use regs->y instead, anyone who depends
82 * XXX upon the Y register being prese 82 * XXX upon the Y register being preserved across a fork deserves
83 * XXX to lose). 83 * XXX to lose).
84 * 84 *
85 * In fact we should take advantage of 85 * In fact we should take advantage of that fact for other things
86 * during system calls... 86 * during system calls...
87 */ 87 */
88 .align 32 88 .align 32
89 sys_vfork: 89 sys_vfork:
90 flushw 90 flushw
91 ba,pt %xcc, sparc_vfork 91 ba,pt %xcc, sparc_vfork
92 add %sp, PTREGS_OFF, %o0 92 add %sp, PTREGS_OFF, %o0
93 93
94 .align 32 94 .align 32
95 sys_fork: 95 sys_fork:
96 flushw 96 flushw
97 ba,pt %xcc, sparc_fork 97 ba,pt %xcc, sparc_fork
98 add %sp, PTREGS_OFF, %o0 98 add %sp, PTREGS_OFF, %o0
99 99
100 .align 32 100 .align 32
101 sys_clone: 101 sys_clone:
102 flushw 102 flushw
103 ba,pt %xcc, sparc_clone 103 ba,pt %xcc, sparc_clone
104 add %sp, PTREGS_OFF, %o0 104 add %sp, PTREGS_OFF, %o0
105 105
106 .globl ret_from_fork 106 .globl ret_from_fork
107 ret_from_fork: 107 ret_from_fork:
108 /* Clear current_thread_info()->new_ch 108 /* Clear current_thread_info()->new_child. */
109 stb %g0, [%g6 + TI_NEW_CHILD] 109 stb %g0, [%g6 + TI_NEW_CHILD]
110 call schedule_tail 110 call schedule_tail
111 mov %g7, %o0 111 mov %g7, %o0
112 ldx [%sp + PTREGS_OFF + PT_V9_I0], 112 ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
113 brnz,pt %o0, ret_sys_call 113 brnz,pt %o0, ret_sys_call
114 ldx [%g6 + TI_FLAGS], %l0 114 ldx [%g6 + TI_FLAGS], %l0
115 ldx [%sp + PTREGS_OFF + PT_V9_G1], 115 ldx [%sp + PTREGS_OFF + PT_V9_G1], %l1
116 call %l1 116 call %l1
117 ldx [%sp + PTREGS_OFF + PT_V9_G2], 117 ldx [%sp + PTREGS_OFF + PT_V9_G2], %o0
118 ba,pt %xcc, ret_sys_call 118 ba,pt %xcc, ret_sys_call
119 mov 0, %o0 119 mov 0, %o0
120 120
121 .globl sparc_exit_group 121 .globl sparc_exit_group
122 .type sparc_exit_group,#function 122 .type sparc_exit_group,#function
123 sparc_exit_group: 123 sparc_exit_group:
124 sethi %hi(sys_exit_group), %g7 124 sethi %hi(sys_exit_group), %g7
125 ba,pt %xcc, 1f 125 ba,pt %xcc, 1f
126 or %g7, %lo(sys_exit_group), %g7 126 or %g7, %lo(sys_exit_group), %g7
127 .size sparc_exit_group,.-sparc_exit_ 127 .size sparc_exit_group,.-sparc_exit_group
128 128
129 .globl sparc_exit 129 .globl sparc_exit
130 .type sparc_exit,#function 130 .type sparc_exit,#function
131 sparc_exit: 131 sparc_exit:
132 sethi %hi(sys_exit), %g7 132 sethi %hi(sys_exit), %g7
133 or %g7, %lo(sys_exit), %g7 133 or %g7, %lo(sys_exit), %g7
134 1: rdpr %pstate, %g2 134 1: rdpr %pstate, %g2
135 wrpr %g2, PSTATE_IE, %pstate 135 wrpr %g2, PSTATE_IE, %pstate
136 rdpr %otherwin, %g1 136 rdpr %otherwin, %g1
137 rdpr %cansave, %g3 137 rdpr %cansave, %g3
138 add %g3, %g1, %g3 138 add %g3, %g1, %g3
139 wrpr %g3, 0x0, %cansave 139 wrpr %g3, 0x0, %cansave
140 wrpr %g0, 0x0, %otherwin 140 wrpr %g0, 0x0, %otherwin
141 wrpr %g2, 0x0, %pstate 141 wrpr %g2, 0x0, %pstate
142 jmpl %g7, %g0 142 jmpl %g7, %g0
143 stb %g0, [%g6 + TI_WSAVED] 143 stb %g0, [%g6 + TI_WSAVED]
144 .size sparc_exit,.-sparc_exit 144 .size sparc_exit,.-sparc_exit
145 145
146 linux_sparc_ni_syscall: 146 linux_sparc_ni_syscall:
147 sethi %hi(sys_ni_syscall), %l7 147 sethi %hi(sys_ni_syscall), %l7
148 ba,pt %xcc, 4f 148 ba,pt %xcc, 4f
149 or %l7, %lo(sys_ni_syscall), %l7 149 or %l7, %lo(sys_ni_syscall), %l7
150 150
151 linux_syscall_trace32: 151 linux_syscall_trace32:
152 call syscall_trace_enter 152 call syscall_trace_enter
153 add %sp, PTREGS_OFF, %o0 153 add %sp, PTREGS_OFF, %o0
154 brnz,pn %o0, 3f 154 brnz,pn %o0, 3f
155 mov -ENOSYS, %o0 155 mov -ENOSYS, %o0
156 156
157 /* Syscall tracing can modify the regi 157 /* Syscall tracing can modify the registers. */
158 ldx [%sp + PTREGS_OFF + PT_V9_G1], 158 ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1
159 sethi %hi(sys_call_table32), %l7 159 sethi %hi(sys_call_table32), %l7
160 ldx [%sp + PTREGS_OFF + PT_V9_I0], 160 ldx [%sp + PTREGS_OFF + PT_V9_I0], %i0
161 or %l7, %lo(sys_call_table32), %l 161 or %l7, %lo(sys_call_table32), %l7
162 ldx [%sp + PTREGS_OFF + PT_V9_I1], 162 ldx [%sp + PTREGS_OFF + PT_V9_I1], %i1
163 ldx [%sp + PTREGS_OFF + PT_V9_I2], 163 ldx [%sp + PTREGS_OFF + PT_V9_I2], %i2
164 ldx [%sp + PTREGS_OFF + PT_V9_I3], 164 ldx [%sp + PTREGS_OFF + PT_V9_I3], %i3
165 ldx [%sp + PTREGS_OFF + PT_V9_I4], 165 ldx [%sp + PTREGS_OFF + PT_V9_I4], %i4
166 ldx [%sp + PTREGS_OFF + PT_V9_I5], 166 ldx [%sp + PTREGS_OFF + PT_V9_I5], %i5
167 167
168 cmp %g1, NR_syscalls 168 cmp %g1, NR_syscalls
169 bgeu,pn %xcc, 3f 169 bgeu,pn %xcc, 3f
170 mov -ENOSYS, %o0 170 mov -ENOSYS, %o0
171 171
172 sll %g1, 2, %l4 172 sll %g1, 2, %l4
173 srl %i0, 0, %o0 173 srl %i0, 0, %o0
174 lduw [%l7 + %l4], %l7 174 lduw [%l7 + %l4], %l7
175 srl %i4, 0, %o4 175 srl %i4, 0, %o4
176 srl %i1, 0, %o1 176 srl %i1, 0, %o1
177 srl %i2, 0, %o2 177 srl %i2, 0, %o2
178 ba,pt %xcc, 5f 178 ba,pt %xcc, 5f
179 srl %i3, 0, %o3 179 srl %i3, 0, %o3
180 180
181 linux_syscall_trace: 181 linux_syscall_trace:
182 call syscall_trace_enter 182 call syscall_trace_enter
183 add %sp, PTREGS_OFF, %o0 183 add %sp, PTREGS_OFF, %o0
184 brnz,pn %o0, 3f 184 brnz,pn %o0, 3f
185 mov -ENOSYS, %o0 185 mov -ENOSYS, %o0
186 186
187 /* Syscall tracing can modify the regi 187 /* Syscall tracing can modify the registers. */
188 ldx [%sp + PTREGS_OFF + PT_V9_G1], 188 ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1
189 sethi %hi(sys_call_table64), %l7 189 sethi %hi(sys_call_table64), %l7
190 ldx [%sp + PTREGS_OFF + PT_V9_I0], 190 ldx [%sp + PTREGS_OFF + PT_V9_I0], %i0
191 or %l7, %lo(sys_call_table64), %l 191 or %l7, %lo(sys_call_table64), %l7
192 ldx [%sp + PTREGS_OFF + PT_V9_I1], 192 ldx [%sp + PTREGS_OFF + PT_V9_I1], %i1
193 ldx [%sp + PTREGS_OFF + PT_V9_I2], 193 ldx [%sp + PTREGS_OFF + PT_V9_I2], %i2
194 ldx [%sp + PTREGS_OFF + PT_V9_I3], 194 ldx [%sp + PTREGS_OFF + PT_V9_I3], %i3
195 ldx [%sp + PTREGS_OFF + PT_V9_I4], 195 ldx [%sp + PTREGS_OFF + PT_V9_I4], %i4
196 ldx [%sp + PTREGS_OFF + PT_V9_I5], 196 ldx [%sp + PTREGS_OFF + PT_V9_I5], %i5
197 197
198 cmp %g1, NR_syscalls 198 cmp %g1, NR_syscalls
199 bgeu,pn %xcc, 3f 199 bgeu,pn %xcc, 3f
200 mov -ENOSYS, %o0 200 mov -ENOSYS, %o0
201 201
202 sll %g1, 2, %l4 202 sll %g1, 2, %l4
203 mov %i0, %o0 203 mov %i0, %o0
204 lduw [%l7 + %l4], %l7 204 lduw [%l7 + %l4], %l7
205 mov %i1, %o1 205 mov %i1, %o1
206 mov %i2, %o2 206 mov %i2, %o2
207 mov %i3, %o3 207 mov %i3, %o3
208 b,pt %xcc, 2f 208 b,pt %xcc, 2f
209 mov %i4, %o4 209 mov %i4, %o4
210 210
211 211
212 /* Linux 32-bit system calls enter her 212 /* Linux 32-bit system calls enter here... */
213 .align 32 213 .align 32
214 .globl linux_sparc_syscall32 214 .globl linux_sparc_syscall32
215 linux_sparc_syscall32: 215 linux_sparc_syscall32:
216 /* Direct access to user regs, much fa 216 /* Direct access to user regs, much faster. */
217 cmp %g1, NR_syscalls 217 cmp %g1, NR_syscalls ! IEU1 Group
218 bgeu,pn %xcc, linux_sparc_ni_syscall 218 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
219 srl %i0, 0, %o0 219 srl %i0, 0, %o0 ! IEU0
220 sll %g1, 2, %l4 220 sll %g1, 2, %l4 ! IEU0 Group
221 srl %i4, 0, %o4 221 srl %i4, 0, %o4 ! IEU1
222 lduw [%l7 + %l4], %l7 222 lduw [%l7 + %l4], %l7 ! Load
223 srl %i1, 0, %o1 223 srl %i1, 0, %o1 ! IEU0 Group
224 ldx [%g6 + TI_FLAGS], %l0 224 ldx [%g6 + TI_FLAGS], %l0 ! Load
225 225
226 srl %i3, 0, %o3 226 srl %i3, 0, %o3 ! IEU0
227 srl %i2, 0, %o2 227 srl %i2, 0, %o2 ! IEU0 Group
228 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_ 228 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
229 bne,pn %icc, linux_syscall_trace32 229 bne,pn %icc, linux_syscall_trace32 ! CTI
230 mov %i0, %l5 230 mov %i0, %l5 ! IEU1
231 5: call %l7 231 5: call %l7 ! CTI Group brk forced
232 srl %i5, 0, %o5 232 srl %i5, 0, %o5 ! IEU1
233 ba,pt %xcc, 3f 233 ba,pt %xcc, 3f
234 sra %o0, 0, %o0 234 sra %o0, 0, %o0
235 235
236 /* Linux native system calls enter her 236 /* Linux native system calls enter here... */
237 .align 32 237 .align 32
238 .globl linux_sparc_syscall 238 .globl linux_sparc_syscall
239 linux_sparc_syscall: 239 linux_sparc_syscall:
240 /* Direct access to user regs, much fa 240 /* Direct access to user regs, much faster. */
241 cmp %g1, NR_syscalls 241 cmp %g1, NR_syscalls ! IEU1 Group
242 bgeu,pn %xcc, linux_sparc_ni_syscall 242 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
243 mov %i0, %o0 243 mov %i0, %o0 ! IEU0
244 sll %g1, 2, %l4 244 sll %g1, 2, %l4 ! IEU0 Group
245 mov %i1, %o1 245 mov %i1, %o1 ! IEU1
246 lduw [%l7 + %l4], %l7 246 lduw [%l7 + %l4], %l7 ! Load
247 4: mov %i2, %o2 247 4: mov %i2, %o2 ! IEU0 Group
248 ldx [%g6 + TI_FLAGS], %l0 248 ldx [%g6 + TI_FLAGS], %l0 ! Load
249 249
250 mov %i3, %o3 250 mov %i3, %o3 ! IEU1
251 mov %i4, %o4 251 mov %i4, %o4 ! IEU0 Group
252 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_ 252 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
253 bne,pn %icc, linux_syscall_trace 253 bne,pn %icc, linux_syscall_trace ! CTI Group
254 mov %i0, %l5 254 mov %i0, %l5 ! IEU0
255 2: call %l7 255 2: call %l7 ! CTI Group brk forced
256 mov %i5, %o5 256 mov %i5, %o5 ! IEU0
257 nop 257 nop
258 258
259 3: stx %o0, [%sp + PTREGS_OFF + PT_V9 259 3: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
260 ret_sys_call: 260 ret_sys_call:
261 ldx [%sp + PTREGS_OFF + PT_V9_TSTA 261 ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
262 mov %ulo(TSTATE_XCARRY | TSTATE_IC 262 mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
263 sllx %g2, 32, %g2 263 sllx %g2, 32, %g2
264 264
265 cmp %o0, -ERESTART_RESTARTBLOCK 265 cmp %o0, -ERESTART_RESTARTBLOCK
266 bgeu,pn %xcc, 1f 266 bgeu,pn %xcc, 1f
267 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_ 267 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
268 ldx [%sp + PTREGS_OFF + PT_V9_TNPC 268 ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
269 269
270 2: 270 2:
271 /* System call success, clear Carry co 271 /* System call success, clear Carry condition code. */
272 andn %g3, %g2, %g3 272 andn %g3, %g2, %g3
273 3: 273 3:
274 stx %g3, [%sp + PTREGS_OFF + PT_V9 274 stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
275 bne,pn %icc, linux_syscall_trace2 275 bne,pn %icc, linux_syscall_trace2
276 add %l1, 0x4, %l2 276 add %l1, 0x4, %l2 ! npc = npc+4
277 stx %l1, [%sp + PTREGS_OFF + PT_V9 277 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
278 ba,pt %xcc, rtrap 278 ba,pt %xcc, rtrap
279 stx %l2, [%sp + PTREGS_OFF + PT_V9 279 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
280 280
281 1: 281 1:
282 /* Check if force_successful_syscall_r 282 /* Check if force_successful_syscall_return()
283 * was invoked. 283 * was invoked.
284 */ 284 */
285 ldub [%g6 + TI_SYS_NOERROR], %l2 285 ldub [%g6 + TI_SYS_NOERROR], %l2
286 brnz,pn %l2, 2b 286 brnz,pn %l2, 2b
287 ldx [%sp + PTREGS_OFF + PT_V9_TNPC 287 ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
288 /* System call failure, set Carry cond 288 /* System call failure, set Carry condition code.
289 * Also, get abs(errno) to return to t 289 * Also, get abs(errno) to return to the process.
290 */ 290 */
291 sub %g0, %o0, %o0 291 sub %g0, %o0, %o0
292 stx %o0, [%sp + PTREGS_OFF + PT_V9 292 stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
293 ba,pt %xcc, 3b 293 ba,pt %xcc, 3b
294 or %g3, %g2, %g3 294 or %g3, %g2, %g3
295 295
296 linux_syscall_trace2: 296 linux_syscall_trace2:
297 call syscall_trace_leave 297 call syscall_trace_leave
298 add %sp, PTREGS_OFF, %o0 298 add %sp, PTREGS_OFF, %o0
299 stx %l1, [%sp + PTREGS_OFF + PT_V9 299 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
300 ba,pt %xcc, rtrap 300 ba,pt %xcc, rtrap
301 stx %l2, [%sp + PTREGS_OFF + PT_V9 301 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
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