1 /* SPDX-License-Identifier: GPL-2.0 */ <<
2 /* SunOS's execv() call only specifies 1 /* SunOS's execv() call only specifies the argv argument, the
3 * environment settings are the same a 2 * environment settings are the same as the calling processes.
4 */ 3 */
5 sys64_execve: 4 sys64_execve:
6 set sys_execve, %g1 5 set sys_execve, %g1
7 jmpl %g1, %g0 6 jmpl %g1, %g0
8 flushw 7 flushw
9 8
10 sys64_execveat: <<
11 set sys_execveat, %g1 <<
12 jmpl %g1, %g0 <<
13 flushw <<
14 <<
15 #ifdef CONFIG_COMPAT 9 #ifdef CONFIG_COMPAT
16 sunos_execv: 10 sunos_execv:
17 mov %g0, %o2 11 mov %g0, %o2
18 sys32_execve: 12 sys32_execve:
19 set compat_sys_execve, %g1 13 set compat_sys_execve, %g1
20 jmpl %g1, %g0 14 jmpl %g1, %g0
21 flushw 15 flushw
22 <<
23 sys32_execveat: <<
24 set compat_sys_execveat, %g1 <<
25 jmpl %g1, %g0 <<
26 flushw <<
27 #endif 16 #endif
28 17
29 .align 32 18 .align 32
>> 19 sys_sparc_pipe:
>> 20 ba,pt %xcc, sys_sparc_pipe_real
>> 21 add %sp, PTREGS_OFF, %o0
>> 22 sys_nis_syscall:
>> 23 ba,pt %xcc, c_sys_nis_syscall
>> 24 add %sp, PTREGS_OFF, %o0
>> 25 sys_memory_ordering:
>> 26 ba,pt %xcc, sparc_memory_ordering
>> 27 add %sp, PTREGS_OFF, %o1
30 #ifdef CONFIG_COMPAT 28 #ifdef CONFIG_COMPAT
31 sys32_sigstack: 29 sys32_sigstack:
32 ba,pt %xcc, do_sys32_sigstack 30 ba,pt %xcc, do_sys32_sigstack
33 mov %i6, %o2 31 mov %i6, %o2
34 #endif 32 #endif
35 .align 32 33 .align 32
36 #ifdef CONFIG_COMPAT 34 #ifdef CONFIG_COMPAT
37 sys32_sigreturn: 35 sys32_sigreturn:
38 add %sp, PTREGS_OFF, %o0 36 add %sp, PTREGS_OFF, %o0
39 call do_sigreturn32 37 call do_sigreturn32
40 add %o7, 1f-.-4, %o7 38 add %o7, 1f-.-4, %o7
41 nop 39 nop
42 #endif 40 #endif
43 sys_rt_sigreturn: 41 sys_rt_sigreturn:
44 add %sp, PTREGS_OFF, %o0 42 add %sp, PTREGS_OFF, %o0
45 call do_rt_sigreturn 43 call do_rt_sigreturn
46 add %o7, 1f-.-4, %o7 44 add %o7, 1f-.-4, %o7
47 nop 45 nop
48 #ifdef CONFIG_COMPAT 46 #ifdef CONFIG_COMPAT
49 sys32_rt_sigreturn: 47 sys32_rt_sigreturn:
50 add %sp, PTREGS_OFF, %o0 48 add %sp, PTREGS_OFF, %o0
51 call do_rt_sigreturn32 49 call do_rt_sigreturn32
52 add %o7, 1f-.-4, %o7 50 add %o7, 1f-.-4, %o7
53 nop 51 nop
54 #endif 52 #endif
55 .align 32 53 .align 32
56 1: ldx [%g6 + TI_FLAGS], %l5 54 1: ldx [%g6 + TI_FLAGS], %l5
57 andcc %l5, (_TIF_SYSCALL_TRACE|_TIF_ !! 55 andcc %l5, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
58 be,pt %icc, rtrap 56 be,pt %icc, rtrap
59 nop 57 nop
60 call syscall_trace_leave 58 call syscall_trace_leave
61 add %sp, PTREGS_OFF, %o0 59 add %sp, PTREGS_OFF, %o0
62 ba,pt %xcc, rtrap 60 ba,pt %xcc, rtrap
63 nop 61 nop
64 62
65 /* This is how fork() was meant to be 63 /* This is how fork() was meant to be done, 8 instruction entry.
66 * 64 *
67 * I questioned the following code bri 65 * I questioned the following code briefly, let me clear things
68 * up so you must not reason on it lik 66 * up so you must not reason on it like I did.
69 * 67 *
70 * Know the fork_kpsr etc. we use in t 68 * Know the fork_kpsr etc. we use in the sparc32 port? We don't
71 * need it here because the only piece 69 * need it here because the only piece of window state we copy to
72 * the child is the CWP register. Eve 70 * the child is the CWP register. Even if the parent sleeps,
73 * we are safe because we stuck it int 71 * we are safe because we stuck it into pt_regs of the parent
74 * so it will not change. 72 * so it will not change.
75 * 73 *
76 * XXX This raises the question, wheth 74 * XXX This raises the question, whether we can do the same on
77 * XXX sparc32 to get rid of fork_kpsr 75 * XXX sparc32 to get rid of fork_kpsr _and_ fork_kwim. The
78 * XXX answer is yes. We stick fork_k 76 * XXX answer is yes. We stick fork_kpsr in UREG_G0 and
79 * XXX fork_kwim in UREG_G1 (global re 77 * XXX fork_kwim in UREG_G1 (global registers are considered
80 * XXX volatile across a system call i 78 * XXX volatile across a system call in the sparc ABI I think
81 * XXX if it isn't we can use regs->y 79 * XXX if it isn't we can use regs->y instead, anyone who depends
82 * XXX upon the Y register being prese 80 * XXX upon the Y register being preserved across a fork deserves
83 * XXX to lose). 81 * XXX to lose).
84 * 82 *
85 * In fact we should take advantage of 83 * In fact we should take advantage of that fact for other things
86 * during system calls... 84 * during system calls...
87 */ 85 */
88 .align 32 86 .align 32
89 sys_vfork: !! 87 sys_vfork: /* Under Linux, vfork and fork are just special cases of clone. */
90 flushw !! 88 sethi %hi(0x4000 | 0x0100 | SIGCHLD), %o0
91 ba,pt %xcc, sparc_vfork !! 89 or %o0, %lo(0x4000 | 0x0100 | SIGCHLD), %o0
92 add %sp, PTREGS_OFF, %o0 !! 90 ba,pt %xcc, sys_clone
93 <<
94 .align 32 <<
95 sys_fork: 91 sys_fork:
96 flushw !! 92 clr %o1
97 ba,pt %xcc, sparc_fork !! 93 mov SIGCHLD, %o0
98 add %sp, PTREGS_OFF, %o0 <<
99 <<
100 .align 32 <<
101 sys_clone: 94 sys_clone:
102 flushw 95 flushw
103 ba,pt %xcc, sparc_clone !! 96 movrz %o1, %fp, %o1
104 add %sp, PTREGS_OFF, %o0 !! 97 mov 0, %o3
>> 98 ba,pt %xcc, sparc_do_fork
>> 99 add %sp, PTREGS_OFF, %o2
105 100
106 .globl ret_from_fork !! 101 .globl ret_from_syscall
107 ret_from_fork: !! 102 ret_from_syscall:
108 /* Clear current_thread_info()->new_ch 103 /* Clear current_thread_info()->new_child. */
109 stb %g0, [%g6 + TI_NEW_CHILD] 104 stb %g0, [%g6 + TI_NEW_CHILD]
110 call schedule_tail 105 call schedule_tail
111 mov %g7, %o0 106 mov %g7, %o0
112 ldx [%sp + PTREGS_OFF + PT_V9_I0], 107 ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
113 brnz,pt %o0, ret_sys_call 108 brnz,pt %o0, ret_sys_call
114 ldx [%g6 + TI_FLAGS], %l0 109 ldx [%g6 + TI_FLAGS], %l0
115 ldx [%sp + PTREGS_OFF + PT_V9_G1], 110 ldx [%sp + PTREGS_OFF + PT_V9_G1], %l1
116 call %l1 111 call %l1
117 ldx [%sp + PTREGS_OFF + PT_V9_G2], 112 ldx [%sp + PTREGS_OFF + PT_V9_G2], %o0
118 ba,pt %xcc, ret_sys_call 113 ba,pt %xcc, ret_sys_call
119 mov 0, %o0 114 mov 0, %o0
120 115
121 .globl sparc_exit_group 116 .globl sparc_exit_group
122 .type sparc_exit_group,#function 117 .type sparc_exit_group,#function
123 sparc_exit_group: 118 sparc_exit_group:
124 sethi %hi(sys_exit_group), %g7 119 sethi %hi(sys_exit_group), %g7
125 ba,pt %xcc, 1f 120 ba,pt %xcc, 1f
126 or %g7, %lo(sys_exit_group), %g7 121 or %g7, %lo(sys_exit_group), %g7
127 .size sparc_exit_group,.-sparc_exit_ 122 .size sparc_exit_group,.-sparc_exit_group
128 123
129 .globl sparc_exit 124 .globl sparc_exit
130 .type sparc_exit,#function 125 .type sparc_exit,#function
131 sparc_exit: 126 sparc_exit:
132 sethi %hi(sys_exit), %g7 127 sethi %hi(sys_exit), %g7
133 or %g7, %lo(sys_exit), %g7 128 or %g7, %lo(sys_exit), %g7
134 1: rdpr %pstate, %g2 129 1: rdpr %pstate, %g2
135 wrpr %g2, PSTATE_IE, %pstate 130 wrpr %g2, PSTATE_IE, %pstate
136 rdpr %otherwin, %g1 131 rdpr %otherwin, %g1
137 rdpr %cansave, %g3 132 rdpr %cansave, %g3
138 add %g3, %g1, %g3 133 add %g3, %g1, %g3
139 wrpr %g3, 0x0, %cansave 134 wrpr %g3, 0x0, %cansave
140 wrpr %g0, 0x0, %otherwin 135 wrpr %g0, 0x0, %otherwin
141 wrpr %g2, 0x0, %pstate 136 wrpr %g2, 0x0, %pstate
142 jmpl %g7, %g0 137 jmpl %g7, %g0
143 stb %g0, [%g6 + TI_WSAVED] 138 stb %g0, [%g6 + TI_WSAVED]
144 .size sparc_exit,.-sparc_exit 139 .size sparc_exit,.-sparc_exit
145 140
146 linux_sparc_ni_syscall: 141 linux_sparc_ni_syscall:
147 sethi %hi(sys_ni_syscall), %l7 142 sethi %hi(sys_ni_syscall), %l7
148 ba,pt %xcc, 4f 143 ba,pt %xcc, 4f
149 or %l7, %lo(sys_ni_syscall), %l7 144 or %l7, %lo(sys_ni_syscall), %l7
150 145
151 linux_syscall_trace32: 146 linux_syscall_trace32:
152 call syscall_trace_enter 147 call syscall_trace_enter
153 add %sp, PTREGS_OFF, %o0 148 add %sp, PTREGS_OFF, %o0
154 brnz,pn %o0, 3f 149 brnz,pn %o0, 3f
155 mov -ENOSYS, %o0 150 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 151 srl %i0, 0, %o0
174 lduw [%l7 + %l4], %l7 <<
175 srl %i4, 0, %o4 152 srl %i4, 0, %o4
176 srl %i1, 0, %o1 153 srl %i1, 0, %o1
177 srl %i2, 0, %o2 154 srl %i2, 0, %o2
178 ba,pt %xcc, 5f 155 ba,pt %xcc, 5f
179 srl %i3, 0, %o3 156 srl %i3, 0, %o3
180 157
181 linux_syscall_trace: 158 linux_syscall_trace:
182 call syscall_trace_enter 159 call syscall_trace_enter
183 add %sp, PTREGS_OFF, %o0 160 add %sp, PTREGS_OFF, %o0
184 brnz,pn %o0, 3f 161 brnz,pn %o0, 3f
185 mov -ENOSYS, %o0 162 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 163 mov %i0, %o0
204 lduw [%l7 + %l4], %l7 <<
205 mov %i1, %o1 164 mov %i1, %o1
206 mov %i2, %o2 165 mov %i2, %o2
207 mov %i3, %o3 166 mov %i3, %o3
208 b,pt %xcc, 2f 167 b,pt %xcc, 2f
209 mov %i4, %o4 168 mov %i4, %o4
210 169
211 170
212 /* Linux 32-bit system calls enter her 171 /* Linux 32-bit system calls enter here... */
213 .align 32 172 .align 32
214 .globl linux_sparc_syscall32 173 .globl linux_sparc_syscall32
215 linux_sparc_syscall32: 174 linux_sparc_syscall32:
216 /* Direct access to user regs, much fa 175 /* Direct access to user regs, much faster. */
217 cmp %g1, NR_syscalls 176 cmp %g1, NR_syscalls ! IEU1 Group
218 bgeu,pn %xcc, linux_sparc_ni_syscall 177 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
219 srl %i0, 0, %o0 178 srl %i0, 0, %o0 ! IEU0
220 sll %g1, 2, %l4 179 sll %g1, 2, %l4 ! IEU0 Group
221 srl %i4, 0, %o4 180 srl %i4, 0, %o4 ! IEU1
222 lduw [%l7 + %l4], %l7 181 lduw [%l7 + %l4], %l7 ! Load
223 srl %i1, 0, %o1 182 srl %i1, 0, %o1 ! IEU0 Group
224 ldx [%g6 + TI_FLAGS], %l0 183 ldx [%g6 + TI_FLAGS], %l0 ! Load
225 184
226 srl %i3, 0, %o3 185 srl %i3, 0, %o3 ! IEU0
227 srl %i2, 0, %o2 186 srl %i2, 0, %o2 ! IEU0 Group
228 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_ !! 187 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
229 bne,pn %icc, linux_syscall_trace32 188 bne,pn %icc, linux_syscall_trace32 ! CTI
230 mov %i0, %l5 189 mov %i0, %l5 ! IEU1
231 5: call %l7 190 5: call %l7 ! CTI Group brk forced
232 srl %i5, 0, %o5 191 srl %i5, 0, %o5 ! IEU1
233 ba,pt %xcc, 3f 192 ba,pt %xcc, 3f
234 sra %o0, 0, %o0 193 sra %o0, 0, %o0
235 194
236 /* Linux native system calls enter her 195 /* Linux native system calls enter here... */
237 .align 32 196 .align 32
238 .globl linux_sparc_syscall 197 .globl linux_sparc_syscall
239 linux_sparc_syscall: 198 linux_sparc_syscall:
240 /* Direct access to user regs, much fa 199 /* Direct access to user regs, much faster. */
241 cmp %g1, NR_syscalls 200 cmp %g1, NR_syscalls ! IEU1 Group
242 bgeu,pn %xcc, linux_sparc_ni_syscall 201 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
243 mov %i0, %o0 202 mov %i0, %o0 ! IEU0
244 sll %g1, 2, %l4 203 sll %g1, 2, %l4 ! IEU0 Group
245 mov %i1, %o1 204 mov %i1, %o1 ! IEU1
246 lduw [%l7 + %l4], %l7 205 lduw [%l7 + %l4], %l7 ! Load
247 4: mov %i2, %o2 206 4: mov %i2, %o2 ! IEU0 Group
248 ldx [%g6 + TI_FLAGS], %l0 207 ldx [%g6 + TI_FLAGS], %l0 ! Load
249 208
250 mov %i3, %o3 209 mov %i3, %o3 ! IEU1
251 mov %i4, %o4 210 mov %i4, %o4 ! IEU0 Group
252 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_ !! 211 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
253 bne,pn %icc, linux_syscall_trace 212 bne,pn %icc, linux_syscall_trace ! CTI Group
254 mov %i0, %l5 213 mov %i0, %l5 ! IEU0
255 2: call %l7 214 2: call %l7 ! CTI Group brk forced
256 mov %i5, %o5 215 mov %i5, %o5 ! IEU0
257 nop 216 nop
258 217
259 3: stx %o0, [%sp + PTREGS_OFF + PT_V9 218 3: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
260 ret_sys_call: 219 ret_sys_call:
261 ldx [%sp + PTREGS_OFF + PT_V9_TSTA 220 ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
262 mov %ulo(TSTATE_XCARRY | TSTATE_IC 221 mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
263 sllx %g2, 32, %g2 222 sllx %g2, 32, %g2
264 223
265 cmp %o0, -ERESTART_RESTARTBLOCK 224 cmp %o0, -ERESTART_RESTARTBLOCK
266 bgeu,pn %xcc, 1f 225 bgeu,pn %xcc, 1f
267 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_ !! 226 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
268 ldx [%sp + PTREGS_OFF + PT_V9_TNPC 227 ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
269 228
270 2: 229 2:
271 /* System call success, clear Carry co 230 /* System call success, clear Carry condition code. */
272 andn %g3, %g2, %g3 231 andn %g3, %g2, %g3
273 3: 232 3:
274 stx %g3, [%sp + PTREGS_OFF + PT_V9 233 stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
275 bne,pn %icc, linux_syscall_trace2 234 bne,pn %icc, linux_syscall_trace2
276 add %l1, 0x4, %l2 235 add %l1, 0x4, %l2 ! npc = npc+4
277 stx %l1, [%sp + PTREGS_OFF + PT_V9 236 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
278 ba,pt %xcc, rtrap 237 ba,pt %xcc, rtrap
279 stx %l2, [%sp + PTREGS_OFF + PT_V9 238 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
280 239
281 1: 240 1:
282 /* Check if force_successful_syscall_r 241 /* Check if force_successful_syscall_return()
283 * was invoked. 242 * was invoked.
284 */ 243 */
285 ldub [%g6 + TI_SYS_NOERROR], %l2 244 ldub [%g6 + TI_SYS_NOERROR], %l2
286 brnz,pn %l2, 2b 245 brnz,pn %l2, 2b
287 ldx [%sp + PTREGS_OFF + PT_V9_TNPC 246 ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
288 /* System call failure, set Carry cond 247 /* System call failure, set Carry condition code.
289 * Also, get abs(errno) to return to t 248 * Also, get abs(errno) to return to the process.
290 */ 249 */
291 sub %g0, %o0, %o0 250 sub %g0, %o0, %o0
292 stx %o0, [%sp + PTREGS_OFF + PT_V9 251 stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
293 ba,pt %xcc, 3b 252 ba,pt %xcc, 3b
294 or %g3, %g2, %g3 253 or %g3, %g2, %g3
295 254
296 linux_syscall_trace2: 255 linux_syscall_trace2:
297 call syscall_trace_leave 256 call syscall_trace_leave
298 add %sp, PTREGS_OFF, %o0 257 add %sp, PTREGS_OFF, %o0
299 stx %l1, [%sp + PTREGS_OFF + PT_V9 258 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
300 ba,pt %xcc, rtrap 259 ba,pt %xcc, rtrap
301 stx %l2, [%sp + PTREGS_OFF + PT_V9 260 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
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