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 sys_execve:
6 set sys_execve, %g1 !! 5 sethi %hi(sparc_execve), %g1
7 jmpl %g1, %g0 !! 6 ba,pt %xcc, execve_merge
8 flushw !! 7 or %g1, %lo(sparc_execve), %g1
9 <<
10 sys64_execveat: <<
11 set sys_execveat, %g1 <<
12 jmpl %g1, %g0 <<
13 flushw <<
14 8
15 #ifdef CONFIG_COMPAT 9 #ifdef CONFIG_COMPAT
16 sunos_execv: 10 sunos_execv:
17 mov %g0, %o2 !! 11 stx %g0, [%sp + PTREGS_OFF + PT_V9_I2]
18 sys32_execve: 12 sys32_execve:
19 set compat_sys_execve, %g1 !! 13 sethi %hi(sparc32_execve), %g1
20 jmpl %g1, %g0 !! 14 or %g1, %lo(sparc32_execve), %g1
21 flushw !! 15 #endif
22 16
23 sys32_execveat: !! 17 execve_merge:
24 set compat_sys_execveat, %g1 !! 18 flushw
25 jmpl %g1, %g0 19 jmpl %g1, %g0
26 flushw !! 20 add %sp, PTREGS_OFF, %o0
27 #endif <<
28 21
29 .align 32 22 .align 32
>> 23 sys_sparc_pipe:
>> 24 ba,pt %xcc, sys_sparc_pipe_real
>> 25 add %sp, PTREGS_OFF, %o0
>> 26 sys_nis_syscall:
>> 27 ba,pt %xcc, c_sys_nis_syscall
>> 28 add %sp, PTREGS_OFF, %o0
>> 29 sys_memory_ordering:
>> 30 ba,pt %xcc, sparc_memory_ordering
>> 31 add %sp, PTREGS_OFF, %o1
>> 32 sys_sigaltstack:
>> 33 ba,pt %xcc, do_sigaltstack
>> 34 add %i6, STACK_BIAS, %o2
30 #ifdef CONFIG_COMPAT 35 #ifdef CONFIG_COMPAT
31 sys32_sigstack: 36 sys32_sigstack:
32 ba,pt %xcc, do_sys32_sigstack 37 ba,pt %xcc, do_sys32_sigstack
33 mov %i6, %o2 38 mov %i6, %o2
>> 39 sys32_sigaltstack:
>> 40 ba,pt %xcc, do_sys32_sigaltstack
>> 41 mov %i6, %o2
34 #endif 42 #endif
35 .align 32 43 .align 32
36 #ifdef CONFIG_COMPAT 44 #ifdef CONFIG_COMPAT
37 sys32_sigreturn: 45 sys32_sigreturn:
38 add %sp, PTREGS_OFF, %o0 46 add %sp, PTREGS_OFF, %o0
39 call do_sigreturn32 47 call do_sigreturn32
40 add %o7, 1f-.-4, %o7 48 add %o7, 1f-.-4, %o7
41 nop 49 nop
42 #endif 50 #endif
43 sys_rt_sigreturn: 51 sys_rt_sigreturn:
44 add %sp, PTREGS_OFF, %o0 52 add %sp, PTREGS_OFF, %o0
45 call do_rt_sigreturn 53 call do_rt_sigreturn
46 add %o7, 1f-.-4, %o7 54 add %o7, 1f-.-4, %o7
47 nop 55 nop
48 #ifdef CONFIG_COMPAT 56 #ifdef CONFIG_COMPAT
49 sys32_rt_sigreturn: 57 sys32_rt_sigreturn:
50 add %sp, PTREGS_OFF, %o0 58 add %sp, PTREGS_OFF, %o0
51 call do_rt_sigreturn32 59 call do_rt_sigreturn32
52 add %o7, 1f-.-4, %o7 60 add %o7, 1f-.-4, %o7
53 nop 61 nop
54 #endif 62 #endif
55 .align 32 63 .align 32
56 1: ldx [%g6 + TI_FLAGS], %l5 64 1: ldx [%g6 + TI_FLAGS], %l5
57 andcc %l5, (_TIF_SYSCALL_TRACE|_TIF_ !! 65 andcc %l5, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %g0
58 be,pt %icc, rtrap 66 be,pt %icc, rtrap
59 nop 67 nop
60 call syscall_trace_leave 68 call syscall_trace_leave
61 add %sp, PTREGS_OFF, %o0 69 add %sp, PTREGS_OFF, %o0
62 ba,pt %xcc, rtrap 70 ba,pt %xcc, rtrap
63 nop 71 nop
64 72
65 /* This is how fork() was meant to be 73 /* This is how fork() was meant to be done, 8 instruction entry.
66 * 74 *
67 * I questioned the following code bri 75 * I questioned the following code briefly, let me clear things
68 * up so you must not reason on it lik 76 * up so you must not reason on it like I did.
69 * 77 *
70 * Know the fork_kpsr etc. we use in t 78 * Know the fork_kpsr etc. we use in the sparc32 port? We don't
71 * need it here because the only piece 79 * need it here because the only piece of window state we copy to
72 * the child is the CWP register. Eve 80 * the child is the CWP register. Even if the parent sleeps,
73 * we are safe because we stuck it int 81 * we are safe because we stuck it into pt_regs of the parent
74 * so it will not change. 82 * so it will not change.
75 * 83 *
76 * XXX This raises the question, wheth 84 * XXX This raises the question, whether we can do the same on
77 * XXX sparc32 to get rid of fork_kpsr 85 * XXX sparc32 to get rid of fork_kpsr _and_ fork_kwim. The
78 * XXX answer is yes. We stick fork_k 86 * XXX answer is yes. We stick fork_kpsr in UREG_G0 and
79 * XXX fork_kwim in UREG_G1 (global re 87 * XXX fork_kwim in UREG_G1 (global registers are considered
80 * XXX volatile across a system call i 88 * XXX volatile across a system call in the sparc ABI I think
81 * XXX if it isn't we can use regs->y 89 * XXX if it isn't we can use regs->y instead, anyone who depends
82 * XXX upon the Y register being prese 90 * XXX upon the Y register being preserved across a fork deserves
83 * XXX to lose). 91 * XXX to lose).
84 * 92 *
85 * In fact we should take advantage of 93 * In fact we should take advantage of that fact for other things
86 * during system calls... 94 * during system calls...
87 */ 95 */
88 .align 32 96 .align 32
89 sys_vfork: !! 97 sys_vfork: /* Under Linux, vfork and fork are just special cases of clone. */
90 flushw !! 98 sethi %hi(0x4000 | 0x0100 | SIGCHLD), %o0
91 ba,pt %xcc, sparc_vfork !! 99 or %o0, %lo(0x4000 | 0x0100 | SIGCHLD), %o0
92 add %sp, PTREGS_OFF, %o0 !! 100 ba,pt %xcc, sys_clone
93 <<
94 .align 32 <<
95 sys_fork: 101 sys_fork:
96 flushw !! 102 clr %o1
97 ba,pt %xcc, sparc_fork !! 103 mov SIGCHLD, %o0
98 add %sp, PTREGS_OFF, %o0 <<
99 <<
100 .align 32 <<
101 sys_clone: 104 sys_clone:
102 flushw 105 flushw
103 ba,pt %xcc, sparc_clone !! 106 movrz %o1, %fp, %o1
104 add %sp, PTREGS_OFF, %o0 !! 107 mov 0, %o3
105 !! 108 ba,pt %xcc, sparc_do_fork
106 .globl ret_from_fork !! 109 add %sp, PTREGS_OFF, %o2
107 ret_from_fork: !! 110
108 /* Clear current_thread_info()->new_ch !! 111 .globl ret_from_syscall
>> 112 ret_from_syscall:
>> 113 /* Clear current_thread_info()->new_child, and
>> 114 * check performance counter stuff too.
>> 115 */
109 stb %g0, [%g6 + TI_NEW_CHILD] 116 stb %g0, [%g6 + TI_NEW_CHILD]
>> 117 ldx [%g6 + TI_FLAGS], %l0
110 call schedule_tail 118 call schedule_tail
111 mov %g7, %o0 119 mov %g7, %o0
112 ldx [%sp + PTREGS_OFF + PT_V9_I0], !! 120 andcc %l0, _TIF_PERFCTR, %g0
113 brnz,pt %o0, ret_sys_call !! 121 be,pt %icc, 1f
114 ldx [%g6 + TI_FLAGS], %l0 !! 122 nop
115 ldx [%sp + PTREGS_OFF + PT_V9_G1], !! 123 ldx [%g6 + TI_PCR], %o7
116 call %l1 !! 124 wr %g0, %o7, %pcr
117 ldx [%sp + PTREGS_OFF + PT_V9_G2], !! 125
118 ba,pt %xcc, ret_sys_call !! 126 /* Blackbird errata workaround. See commentary in
119 mov 0, %o0 !! 127 * smp.c:smp_percpu_timer_interrupt() for more
120 !! 128 * information.
121 .globl sparc_exit_group !! 129 */
122 .type sparc_exit_group,#function !! 130 ba,pt %xcc, 99f
123 sparc_exit_group: !! 131 nop
124 sethi %hi(sys_exit_group), %g7 !! 132
125 ba,pt %xcc, 1f !! 133 .align 64
126 or %g7, %lo(sys_exit_group), %g7 !! 134 99: wr %g0, %g0, %pic
127 .size sparc_exit_group,.-sparc_exit_ !! 135 rd %pic, %g0
>> 136
>> 137 1: ba,pt %xcc, ret_sys_call
>> 138 ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
128 139
129 .globl sparc_exit 140 .globl sparc_exit
130 .type sparc_exit,#function 141 .type sparc_exit,#function
131 sparc_exit: 142 sparc_exit:
132 sethi %hi(sys_exit), %g7 !! 143 rdpr %pstate, %g2
133 or %g7, %lo(sys_exit), %g7 <<
134 1: rdpr %pstate, %g2 <<
135 wrpr %g2, PSTATE_IE, %pstate 144 wrpr %g2, PSTATE_IE, %pstate
136 rdpr %otherwin, %g1 145 rdpr %otherwin, %g1
137 rdpr %cansave, %g3 146 rdpr %cansave, %g3
138 add %g3, %g1, %g3 147 add %g3, %g1, %g3
139 wrpr %g3, 0x0, %cansave 148 wrpr %g3, 0x0, %cansave
140 wrpr %g0, 0x0, %otherwin 149 wrpr %g0, 0x0, %otherwin
141 wrpr %g2, 0x0, %pstate 150 wrpr %g2, 0x0, %pstate
142 jmpl %g7, %g0 !! 151 ba,pt %xcc, sys_exit
143 stb %g0, [%g6 + TI_WSAVED] 152 stb %g0, [%g6 + TI_WSAVED]
144 .size sparc_exit,.-sparc_exit 153 .size sparc_exit,.-sparc_exit
145 154
146 linux_sparc_ni_syscall: 155 linux_sparc_ni_syscall:
147 sethi %hi(sys_ni_syscall), %l7 156 sethi %hi(sys_ni_syscall), %l7
148 ba,pt %xcc, 4f 157 ba,pt %xcc, 4f
149 or %l7, %lo(sys_ni_syscall), %l7 158 or %l7, %lo(sys_ni_syscall), %l7
150 159
151 linux_syscall_trace32: 160 linux_syscall_trace32:
152 call syscall_trace_enter 161 call syscall_trace_enter
153 add %sp, PTREGS_OFF, %o0 162 add %sp, PTREGS_OFF, %o0
154 brnz,pn %o0, 3f 163 brnz,pn %o0, 3f
155 mov -ENOSYS, %o0 164 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 165 srl %i0, 0, %o0
174 lduw [%l7 + %l4], %l7 <<
175 srl %i4, 0, %o4 166 srl %i4, 0, %o4
176 srl %i1, 0, %o1 167 srl %i1, 0, %o1
177 srl %i2, 0, %o2 168 srl %i2, 0, %o2
178 ba,pt %xcc, 5f !! 169 ba,pt %xcc, 2f
179 srl %i3, 0, %o3 170 srl %i3, 0, %o3
180 171
181 linux_syscall_trace: 172 linux_syscall_trace:
182 call syscall_trace_enter 173 call syscall_trace_enter
183 add %sp, PTREGS_OFF, %o0 174 add %sp, PTREGS_OFF, %o0
184 brnz,pn %o0, 3f 175 brnz,pn %o0, 3f
185 mov -ENOSYS, %o0 176 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 177 mov %i0, %o0
204 lduw [%l7 + %l4], %l7 <<
205 mov %i1, %o1 178 mov %i1, %o1
206 mov %i2, %o2 179 mov %i2, %o2
207 mov %i3, %o3 180 mov %i3, %o3
208 b,pt %xcc, 2f 181 b,pt %xcc, 2f
209 mov %i4, %o4 182 mov %i4, %o4
210 183
211 184
212 /* Linux 32-bit system calls enter her 185 /* Linux 32-bit system calls enter here... */
213 .align 32 186 .align 32
214 .globl linux_sparc_syscall32 187 .globl linux_sparc_syscall32
215 linux_sparc_syscall32: 188 linux_sparc_syscall32:
216 /* Direct access to user regs, much fa 189 /* Direct access to user regs, much faster. */
217 cmp %g1, NR_syscalls !! 190 cmp %g1, NR_SYSCALLS ! IEU1 Group
218 bgeu,pn %xcc, linux_sparc_ni_syscall 191 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
219 srl %i0, 0, %o0 192 srl %i0, 0, %o0 ! IEU0
220 sll %g1, 2, %l4 193 sll %g1, 2, %l4 ! IEU0 Group
221 srl %i4, 0, %o4 194 srl %i4, 0, %o4 ! IEU1
222 lduw [%l7 + %l4], %l7 195 lduw [%l7 + %l4], %l7 ! Load
223 srl %i1, 0, %o1 196 srl %i1, 0, %o1 ! IEU0 Group
224 ldx [%g6 + TI_FLAGS], %l0 197 ldx [%g6 + TI_FLAGS], %l0 ! Load
225 198
226 srl %i3, 0, %o3 !! 199 srl %i5, 0, %o5 ! IEU1
227 srl %i2, 0, %o2 200 srl %i2, 0, %o2 ! IEU0 Group
228 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_ !! 201 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %g0
229 bne,pn %icc, linux_syscall_trace32 202 bne,pn %icc, linux_syscall_trace32 ! CTI
230 mov %i0, %l5 203 mov %i0, %l5 ! IEU1
231 5: call %l7 !! 204 call %l7 ! CTI Group brk forced
232 srl %i5, 0, %o5 !! 205 srl %i3, 0, %o3 ! IEU0
233 ba,pt %xcc, 3f !! 206 ba,a,pt %xcc, 3f
234 sra %o0, 0, %o0 <<
235 207
236 /* Linux native system calls enter her 208 /* Linux native system calls enter here... */
237 .align 32 209 .align 32
238 .globl linux_sparc_syscall 210 .globl linux_sparc_syscall
239 linux_sparc_syscall: 211 linux_sparc_syscall:
240 /* Direct access to user regs, much fa 212 /* Direct access to user regs, much faster. */
241 cmp %g1, NR_syscalls !! 213 cmp %g1, NR_SYSCALLS ! IEU1 Group
242 bgeu,pn %xcc, linux_sparc_ni_syscall 214 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
243 mov %i0, %o0 215 mov %i0, %o0 ! IEU0
244 sll %g1, 2, %l4 216 sll %g1, 2, %l4 ! IEU0 Group
245 mov %i1, %o1 217 mov %i1, %o1 ! IEU1
246 lduw [%l7 + %l4], %l7 218 lduw [%l7 + %l4], %l7 ! Load
247 4: mov %i2, %o2 219 4: mov %i2, %o2 ! IEU0 Group
248 ldx [%g6 + TI_FLAGS], %l0 220 ldx [%g6 + TI_FLAGS], %l0 ! Load
249 221
250 mov %i3, %o3 222 mov %i3, %o3 ! IEU1
251 mov %i4, %o4 223 mov %i4, %o4 ! IEU0 Group
252 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_ !! 224 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %g0
253 bne,pn %icc, linux_syscall_trace 225 bne,pn %icc, linux_syscall_trace ! CTI Group
254 mov %i0, %l5 226 mov %i0, %l5 ! IEU0
255 2: call %l7 227 2: call %l7 ! CTI Group brk forced
256 mov %i5, %o5 228 mov %i5, %o5 ! IEU0
257 nop 229 nop
258 230
259 3: stx %o0, [%sp + PTREGS_OFF + PT_V9 231 3: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
260 ret_sys_call: 232 ret_sys_call:
261 ldx [%sp + PTREGS_OFF + PT_V9_TSTA 233 ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
>> 234 ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
>> 235 sra %o0, 0, %o0
262 mov %ulo(TSTATE_XCARRY | TSTATE_IC 236 mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
263 sllx %g2, 32, %g2 237 sllx %g2, 32, %g2
264 238
>> 239 /* Check if force_successful_syscall_return()
>> 240 * was invoked.
>> 241 */
>> 242 ldub [%g6 + TI_SYS_NOERROR], %l2
>> 243 brnz,a,pn %l2, 80f
>> 244 stb %g0, [%g6 + TI_SYS_NOERROR]
>> 245
265 cmp %o0, -ERESTART_RESTARTBLOCK 246 cmp %o0, -ERESTART_RESTARTBLOCK
266 bgeu,pn %xcc, 1f 247 bgeu,pn %xcc, 1f
267 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_ !! 248 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %l6
268 ldx [%sp + PTREGS_OFF + PT_V9_TNPC !! 249 80:
269 <<
270 2: <<
271 /* System call success, clear Carry co 250 /* System call success, clear Carry condition code. */
272 andn %g3, %g2, %g3 251 andn %g3, %g2, %g3
273 3: <<
274 stx %g3, [%sp + PTREGS_OFF + PT_V9 252 stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
275 bne,pn %icc, linux_syscall_trace2 253 bne,pn %icc, linux_syscall_trace2
276 add %l1, 0x4, %l2 254 add %l1, 0x4, %l2 ! npc = npc+4
277 stx %l1, [%sp + PTREGS_OFF + PT_V9 255 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
278 ba,pt %xcc, rtrap 256 ba,pt %xcc, rtrap
279 stx %l2, [%sp + PTREGS_OFF + PT_V9 257 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
280 258
281 1: 259 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 260 /* System call failure, set Carry condition code.
289 * Also, get abs(errno) to return to t 261 * Also, get abs(errno) to return to the process.
290 */ 262 */
>> 263 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %l6
291 sub %g0, %o0, %o0 264 sub %g0, %o0, %o0
>> 265 or %g3, %g2, %g3
292 stx %o0, [%sp + PTREGS_OFF + PT_V9 266 stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
293 ba,pt %xcc, 3b !! 267 stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
294 or %g3, %g2, %g3 !! 268 bne,pn %icc, linux_syscall_trace2
>> 269 add %l1, 0x4, %l2 ! npc = npc+4
>> 270 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
295 271
>> 272 b,pt %xcc, rtrap
>> 273 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
296 linux_syscall_trace2: 274 linux_syscall_trace2:
297 call syscall_trace_leave 275 call syscall_trace_leave
298 add %sp, PTREGS_OFF, %o0 276 add %sp, PTREGS_OFF, %o0
299 stx %l1, [%sp + PTREGS_OFF + PT_V9 277 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
300 ba,pt %xcc, rtrap 278 ba,pt %xcc, rtrap
301 stx %l2, [%sp + PTREGS_OFF + PT_V9 279 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
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