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