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: /* Under Linux, vfork and fork are just special cases of clone. */
90 flushw !! 90 sethi %hi(0x4000 | 0x0100 | SIGCHLD), %o0
91 ba,pt %xcc, sparc_vfork !! 91 or %o0, %lo(0x4000 | 0x0100 | SIGCHLD), %o0
92 add %sp, PTREGS_OFF, %o0 !! 92 ba,pt %xcc, sys_clone
93 <<
94 .align 32 <<
95 sys_fork: 93 sys_fork:
96 flushw !! 94 clr %o1
97 ba,pt %xcc, sparc_fork !! 95 mov SIGCHLD, %o0
98 add %sp, PTREGS_OFF, %o0 <<
99 <<
100 .align 32 <<
101 sys_clone: 96 sys_clone:
102 flushw 97 flushw
103 ba,pt %xcc, sparc_clone !! 98 movrz %o1, %fp, %o1
104 add %sp, PTREGS_OFF, %o0 !! 99 mov 0, %o3
>> 100 ba,pt %xcc, sparc_do_fork
>> 101 add %sp, PTREGS_OFF, %o2
105 102
106 .globl ret_from_fork 103 .globl ret_from_fork
107 ret_from_fork: 104 ret_from_fork:
108 /* Clear current_thread_info()->new_ch 105 /* Clear current_thread_info()->new_child. */
109 stb %g0, [%g6 + TI_NEW_CHILD] 106 stb %g0, [%g6 + TI_NEW_CHILD]
110 call schedule_tail 107 call schedule_tail
111 mov %g7, %o0 108 mov %g7, %o0
112 ldx [%sp + PTREGS_OFF + PT_V9_I0], 109 ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
113 brnz,pt %o0, ret_sys_call 110 brnz,pt %o0, ret_sys_call
114 ldx [%g6 + TI_FLAGS], %l0 111 ldx [%g6 + TI_FLAGS], %l0
115 ldx [%sp + PTREGS_OFF + PT_V9_G1], 112 ldx [%sp + PTREGS_OFF + PT_V9_G1], %l1
116 call %l1 113 call %l1
117 ldx [%sp + PTREGS_OFF + PT_V9_G2], 114 ldx [%sp + PTREGS_OFF + PT_V9_G2], %o0
118 ba,pt %xcc, ret_sys_call 115 ba,pt %xcc, ret_sys_call
119 mov 0, %o0 116 mov 0, %o0
120 117
121 .globl sparc_exit_group 118 .globl sparc_exit_group
122 .type sparc_exit_group,#function 119 .type sparc_exit_group,#function
123 sparc_exit_group: 120 sparc_exit_group:
124 sethi %hi(sys_exit_group), %g7 121 sethi %hi(sys_exit_group), %g7
125 ba,pt %xcc, 1f 122 ba,pt %xcc, 1f
126 or %g7, %lo(sys_exit_group), %g7 123 or %g7, %lo(sys_exit_group), %g7
127 .size sparc_exit_group,.-sparc_exit_ 124 .size sparc_exit_group,.-sparc_exit_group
128 125
129 .globl sparc_exit 126 .globl sparc_exit
130 .type sparc_exit,#function 127 .type sparc_exit,#function
131 sparc_exit: 128 sparc_exit:
132 sethi %hi(sys_exit), %g7 129 sethi %hi(sys_exit), %g7
133 or %g7, %lo(sys_exit), %g7 130 or %g7, %lo(sys_exit), %g7
134 1: rdpr %pstate, %g2 131 1: rdpr %pstate, %g2
135 wrpr %g2, PSTATE_IE, %pstate 132 wrpr %g2, PSTATE_IE, %pstate
136 rdpr %otherwin, %g1 133 rdpr %otherwin, %g1
137 rdpr %cansave, %g3 134 rdpr %cansave, %g3
138 add %g3, %g1, %g3 135 add %g3, %g1, %g3
139 wrpr %g3, 0x0, %cansave 136 wrpr %g3, 0x0, %cansave
140 wrpr %g0, 0x0, %otherwin 137 wrpr %g0, 0x0, %otherwin
141 wrpr %g2, 0x0, %pstate 138 wrpr %g2, 0x0, %pstate
142 jmpl %g7, %g0 139 jmpl %g7, %g0
143 stb %g0, [%g6 + TI_WSAVED] 140 stb %g0, [%g6 + TI_WSAVED]
144 .size sparc_exit,.-sparc_exit 141 .size sparc_exit,.-sparc_exit
145 142
146 linux_sparc_ni_syscall: 143 linux_sparc_ni_syscall:
147 sethi %hi(sys_ni_syscall), %l7 144 sethi %hi(sys_ni_syscall), %l7
148 ba,pt %xcc, 4f 145 ba,pt %xcc, 4f
149 or %l7, %lo(sys_ni_syscall), %l7 146 or %l7, %lo(sys_ni_syscall), %l7
150 147
151 linux_syscall_trace32: 148 linux_syscall_trace32:
152 call syscall_trace_enter 149 call syscall_trace_enter
153 add %sp, PTREGS_OFF, %o0 150 add %sp, PTREGS_OFF, %o0
154 brnz,pn %o0, 3f 151 brnz,pn %o0, 3f
155 mov -ENOSYS, %o0 152 mov -ENOSYS, %o0
156 153
157 /* Syscall tracing can modify the regi 154 /* Syscall tracing can modify the registers. */
158 ldx [%sp + PTREGS_OFF + PT_V9_G1], 155 ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1
159 sethi %hi(sys_call_table32), %l7 156 sethi %hi(sys_call_table32), %l7
160 ldx [%sp + PTREGS_OFF + PT_V9_I0], 157 ldx [%sp + PTREGS_OFF + PT_V9_I0], %i0
161 or %l7, %lo(sys_call_table32), %l 158 or %l7, %lo(sys_call_table32), %l7
162 ldx [%sp + PTREGS_OFF + PT_V9_I1], 159 ldx [%sp + PTREGS_OFF + PT_V9_I1], %i1
163 ldx [%sp + PTREGS_OFF + PT_V9_I2], 160 ldx [%sp + PTREGS_OFF + PT_V9_I2], %i2
164 ldx [%sp + PTREGS_OFF + PT_V9_I3], 161 ldx [%sp + PTREGS_OFF + PT_V9_I3], %i3
165 ldx [%sp + PTREGS_OFF + PT_V9_I4], 162 ldx [%sp + PTREGS_OFF + PT_V9_I4], %i4
166 ldx [%sp + PTREGS_OFF + PT_V9_I5], 163 ldx [%sp + PTREGS_OFF + PT_V9_I5], %i5
167 164
168 cmp %g1, NR_syscalls 165 cmp %g1, NR_syscalls
169 bgeu,pn %xcc, 3f 166 bgeu,pn %xcc, 3f
170 mov -ENOSYS, %o0 167 mov -ENOSYS, %o0
171 168
172 sll %g1, 2, %l4 169 sll %g1, 2, %l4
173 srl %i0, 0, %o0 170 srl %i0, 0, %o0
174 lduw [%l7 + %l4], %l7 171 lduw [%l7 + %l4], %l7
175 srl %i4, 0, %o4 172 srl %i4, 0, %o4
176 srl %i1, 0, %o1 173 srl %i1, 0, %o1
177 srl %i2, 0, %o2 174 srl %i2, 0, %o2
178 ba,pt %xcc, 5f 175 ba,pt %xcc, 5f
179 srl %i3, 0, %o3 176 srl %i3, 0, %o3
180 177
181 linux_syscall_trace: 178 linux_syscall_trace:
182 call syscall_trace_enter 179 call syscall_trace_enter
183 add %sp, PTREGS_OFF, %o0 180 add %sp, PTREGS_OFF, %o0
184 brnz,pn %o0, 3f 181 brnz,pn %o0, 3f
185 mov -ENOSYS, %o0 182 mov -ENOSYS, %o0
186 183
187 /* Syscall tracing can modify the regi 184 /* Syscall tracing can modify the registers. */
188 ldx [%sp + PTREGS_OFF + PT_V9_G1], 185 ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1
189 sethi %hi(sys_call_table64), %l7 186 sethi %hi(sys_call_table64), %l7
190 ldx [%sp + PTREGS_OFF + PT_V9_I0], 187 ldx [%sp + PTREGS_OFF + PT_V9_I0], %i0
191 or %l7, %lo(sys_call_table64), %l 188 or %l7, %lo(sys_call_table64), %l7
192 ldx [%sp + PTREGS_OFF + PT_V9_I1], 189 ldx [%sp + PTREGS_OFF + PT_V9_I1], %i1
193 ldx [%sp + PTREGS_OFF + PT_V9_I2], 190 ldx [%sp + PTREGS_OFF + PT_V9_I2], %i2
194 ldx [%sp + PTREGS_OFF + PT_V9_I3], 191 ldx [%sp + PTREGS_OFF + PT_V9_I3], %i3
195 ldx [%sp + PTREGS_OFF + PT_V9_I4], 192 ldx [%sp + PTREGS_OFF + PT_V9_I4], %i4
196 ldx [%sp + PTREGS_OFF + PT_V9_I5], 193 ldx [%sp + PTREGS_OFF + PT_V9_I5], %i5
197 194
198 cmp %g1, NR_syscalls 195 cmp %g1, NR_syscalls
199 bgeu,pn %xcc, 3f 196 bgeu,pn %xcc, 3f
200 mov -ENOSYS, %o0 197 mov -ENOSYS, %o0
201 198
202 sll %g1, 2, %l4 199 sll %g1, 2, %l4
203 mov %i0, %o0 200 mov %i0, %o0
204 lduw [%l7 + %l4], %l7 201 lduw [%l7 + %l4], %l7
205 mov %i1, %o1 202 mov %i1, %o1
206 mov %i2, %o2 203 mov %i2, %o2
207 mov %i3, %o3 204 mov %i3, %o3
208 b,pt %xcc, 2f 205 b,pt %xcc, 2f
209 mov %i4, %o4 206 mov %i4, %o4
210 207
211 208
212 /* Linux 32-bit system calls enter her 209 /* Linux 32-bit system calls enter here... */
213 .align 32 210 .align 32
214 .globl linux_sparc_syscall32 211 .globl linux_sparc_syscall32
215 linux_sparc_syscall32: 212 linux_sparc_syscall32:
216 /* Direct access to user regs, much fa 213 /* Direct access to user regs, much faster. */
217 cmp %g1, NR_syscalls 214 cmp %g1, NR_syscalls ! IEU1 Group
218 bgeu,pn %xcc, linux_sparc_ni_syscall 215 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
219 srl %i0, 0, %o0 216 srl %i0, 0, %o0 ! IEU0
220 sll %g1, 2, %l4 217 sll %g1, 2, %l4 ! IEU0 Group
221 srl %i4, 0, %o4 218 srl %i4, 0, %o4 ! IEU1
222 lduw [%l7 + %l4], %l7 219 lduw [%l7 + %l4], %l7 ! Load
223 srl %i1, 0, %o1 220 srl %i1, 0, %o1 ! IEU0 Group
224 ldx [%g6 + TI_FLAGS], %l0 221 ldx [%g6 + TI_FLAGS], %l0 ! Load
225 222
226 srl %i3, 0, %o3 223 srl %i3, 0, %o3 ! IEU0
227 srl %i2, 0, %o2 224 srl %i2, 0, %o2 ! IEU0 Group
228 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_ 225 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
229 bne,pn %icc, linux_syscall_trace32 226 bne,pn %icc, linux_syscall_trace32 ! CTI
230 mov %i0, %l5 227 mov %i0, %l5 ! IEU1
231 5: call %l7 228 5: call %l7 ! CTI Group brk forced
232 srl %i5, 0, %o5 229 srl %i5, 0, %o5 ! IEU1
233 ba,pt %xcc, 3f 230 ba,pt %xcc, 3f
234 sra %o0, 0, %o0 231 sra %o0, 0, %o0
235 232
236 /* Linux native system calls enter her 233 /* Linux native system calls enter here... */
237 .align 32 234 .align 32
238 .globl linux_sparc_syscall 235 .globl linux_sparc_syscall
239 linux_sparc_syscall: 236 linux_sparc_syscall:
240 /* Direct access to user regs, much fa 237 /* Direct access to user regs, much faster. */
241 cmp %g1, NR_syscalls 238 cmp %g1, NR_syscalls ! IEU1 Group
242 bgeu,pn %xcc, linux_sparc_ni_syscall 239 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
243 mov %i0, %o0 240 mov %i0, %o0 ! IEU0
244 sll %g1, 2, %l4 241 sll %g1, 2, %l4 ! IEU0 Group
245 mov %i1, %o1 242 mov %i1, %o1 ! IEU1
246 lduw [%l7 + %l4], %l7 243 lduw [%l7 + %l4], %l7 ! Load
247 4: mov %i2, %o2 244 4: mov %i2, %o2 ! IEU0 Group
248 ldx [%g6 + TI_FLAGS], %l0 245 ldx [%g6 + TI_FLAGS], %l0 ! Load
249 246
250 mov %i3, %o3 247 mov %i3, %o3 ! IEU1
251 mov %i4, %o4 248 mov %i4, %o4 ! IEU0 Group
252 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_ 249 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
253 bne,pn %icc, linux_syscall_trace 250 bne,pn %icc, linux_syscall_trace ! CTI Group
254 mov %i0, %l5 251 mov %i0, %l5 ! IEU0
255 2: call %l7 252 2: call %l7 ! CTI Group brk forced
256 mov %i5, %o5 253 mov %i5, %o5 ! IEU0
257 nop 254 nop
258 255
259 3: stx %o0, [%sp + PTREGS_OFF + PT_V9 256 3: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
260 ret_sys_call: 257 ret_sys_call:
261 ldx [%sp + PTREGS_OFF + PT_V9_TSTA 258 ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
262 mov %ulo(TSTATE_XCARRY | TSTATE_IC 259 mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
263 sllx %g2, 32, %g2 260 sllx %g2, 32, %g2
264 261
265 cmp %o0, -ERESTART_RESTARTBLOCK 262 cmp %o0, -ERESTART_RESTARTBLOCK
266 bgeu,pn %xcc, 1f 263 bgeu,pn %xcc, 1f
267 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_ 264 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
268 ldx [%sp + PTREGS_OFF + PT_V9_TNPC 265 ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
269 266
270 2: 267 2:
271 /* System call success, clear Carry co 268 /* System call success, clear Carry condition code. */
272 andn %g3, %g2, %g3 269 andn %g3, %g2, %g3
273 3: 270 3:
274 stx %g3, [%sp + PTREGS_OFF + PT_V9 271 stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
275 bne,pn %icc, linux_syscall_trace2 272 bne,pn %icc, linux_syscall_trace2
276 add %l1, 0x4, %l2 273 add %l1, 0x4, %l2 ! npc = npc+4
277 stx %l1, [%sp + PTREGS_OFF + PT_V9 274 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
278 ba,pt %xcc, rtrap 275 ba,pt %xcc, rtrap
279 stx %l2, [%sp + PTREGS_OFF + PT_V9 276 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
280 277
281 1: 278 1:
282 /* Check if force_successful_syscall_r 279 /* Check if force_successful_syscall_return()
283 * was invoked. 280 * was invoked.
284 */ 281 */
285 ldub [%g6 + TI_SYS_NOERROR], %l2 282 ldub [%g6 + TI_SYS_NOERROR], %l2
286 brnz,pn %l2, 2b 283 brnz,pn %l2, 2b
287 ldx [%sp + PTREGS_OFF + PT_V9_TNPC 284 ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
288 /* System call failure, set Carry cond 285 /* System call failure, set Carry condition code.
289 * Also, get abs(errno) to return to t 286 * Also, get abs(errno) to return to the process.
290 */ 287 */
291 sub %g0, %o0, %o0 288 sub %g0, %o0, %o0
292 stx %o0, [%sp + PTREGS_OFF + PT_V9 289 stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
293 ba,pt %xcc, 3b 290 ba,pt %xcc, 3b
294 or %g3, %g2, %g3 291 or %g3, %g2, %g3
295 292
296 linux_syscall_trace2: 293 linux_syscall_trace2:
297 call syscall_trace_leave 294 call syscall_trace_leave
298 add %sp, PTREGS_OFF, %o0 295 add %sp, PTREGS_OFF, %o0
299 stx %l1, [%sp + PTREGS_OFF + PT_V9 296 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
300 ba,pt %xcc, rtrap 297 ba,pt %xcc, rtrap
301 stx %l2, [%sp + PTREGS_OFF + PT_V9 298 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
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