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-rw-r--r--arch/s390/kernel/entry.S1103
1 files changed, 483 insertions, 620 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index b13157057e02..3705700ed374 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -19,32 +19,22 @@
19#include <asm/unistd.h> 19#include <asm/unistd.h>
20#include <asm/page.h> 20#include <asm/page.h>
21 21
22/* 22__PT_R0 = __PT_GPRS
23 * Stack layout for the system_call stack entry. 23__PT_R1 = __PT_GPRS + 4
24 * The first few entries are identical to the user_regs_struct. 24__PT_R2 = __PT_GPRS + 8
25 */ 25__PT_R3 = __PT_GPRS + 12
26SP_PTREGS = STACK_FRAME_OVERHEAD 26__PT_R4 = __PT_GPRS + 16
27SP_ARGS = STACK_FRAME_OVERHEAD + __PT_ARGS 27__PT_R5 = __PT_GPRS + 20
28SP_PSW = STACK_FRAME_OVERHEAD + __PT_PSW 28__PT_R6 = __PT_GPRS + 24
29SP_R0 = STACK_FRAME_OVERHEAD + __PT_GPRS 29__PT_R7 = __PT_GPRS + 28
30SP_R1 = STACK_FRAME_OVERHEAD + __PT_GPRS + 4 30__PT_R8 = __PT_GPRS + 32
31SP_R2 = STACK_FRAME_OVERHEAD + __PT_GPRS + 8 31__PT_R9 = __PT_GPRS + 36
32SP_R3 = STACK_FRAME_OVERHEAD + __PT_GPRS + 12 32__PT_R10 = __PT_GPRS + 40
33SP_R4 = STACK_FRAME_OVERHEAD + __PT_GPRS + 16 33__PT_R11 = __PT_GPRS + 44
34SP_R5 = STACK_FRAME_OVERHEAD + __PT_GPRS + 20 34__PT_R12 = __PT_GPRS + 48
35SP_R6 = STACK_FRAME_OVERHEAD + __PT_GPRS + 24 35__PT_R13 = __PT_GPRS + 524
36SP_R7 = STACK_FRAME_OVERHEAD + __PT_GPRS + 28 36__PT_R14 = __PT_GPRS + 56
37SP_R8 = STACK_FRAME_OVERHEAD + __PT_GPRS + 32 37__PT_R15 = __PT_GPRS + 60
38SP_R9 = STACK_FRAME_OVERHEAD + __PT_GPRS + 36
39SP_R10 = STACK_FRAME_OVERHEAD + __PT_GPRS + 40
40SP_R11 = STACK_FRAME_OVERHEAD + __PT_GPRS + 44
41SP_R12 = STACK_FRAME_OVERHEAD + __PT_GPRS + 48
42SP_R13 = STACK_FRAME_OVERHEAD + __PT_GPRS + 52
43SP_R14 = STACK_FRAME_OVERHEAD + __PT_GPRS + 56
44SP_R15 = STACK_FRAME_OVERHEAD + __PT_GPRS + 60
45SP_ORIG_R2 = STACK_FRAME_OVERHEAD + __PT_ORIG_GPR2
46SP_SVC_CODE = STACK_FRAME_OVERHEAD + __PT_SVC_CODE
47SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE
48 38
49_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \ 39_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
50 _TIF_MCCK_PENDING | _TIF_PER_TRAP ) 40 _TIF_MCCK_PENDING | _TIF_PER_TRAP )
@@ -58,133 +48,91 @@ STACK_SIZE = 1 << STACK_SHIFT
58 48
59#define BASED(name) name-system_call(%r13) 49#define BASED(name) name-system_call(%r13)
60 50
61#ifdef CONFIG_TRACE_IRQFLAGS
62 .macro TRACE_IRQS_ON 51 .macro TRACE_IRQS_ON
52#ifdef CONFIG_TRACE_IRQFLAGS
63 basr %r2,%r0 53 basr %r2,%r0
64 l %r1,BASED(.Ltrace_irq_on_caller) 54 l %r1,BASED(.Lhardirqs_on)
65 basr %r14,%r1 55 basr %r14,%r1 # call trace_hardirqs_on_caller
56#endif
66 .endm 57 .endm
67 58
68 .macro TRACE_IRQS_OFF 59 .macro TRACE_IRQS_OFF
60#ifdef CONFIG_TRACE_IRQFLAGS
69 basr %r2,%r0 61 basr %r2,%r0
70 l %r1,BASED(.Ltrace_irq_off_caller) 62 l %r1,BASED(.Lhardirqs_off)
71 basr %r14,%r1 63 basr %r14,%r1 # call trace_hardirqs_off_caller
72 .endm
73#else
74#define TRACE_IRQS_ON
75#define TRACE_IRQS_OFF
76#endif 64#endif
65 .endm
77 66
78#ifdef CONFIG_LOCKDEP
79 .macro LOCKDEP_SYS_EXIT 67 .macro LOCKDEP_SYS_EXIT
80 tm SP_PSW+1(%r15),0x01 # returning to user ? 68#ifdef CONFIG_LOCKDEP
81 jz 0f 69 tm __PT_PSW+1(%r11),0x01 # returning to user ?
70 jz .+10
82 l %r1,BASED(.Llockdep_sys_exit) 71 l %r1,BASED(.Llockdep_sys_exit)
83 basr %r14,%r1 72 basr %r14,%r1 # call lockdep_sys_exit
840:
85 .endm
86#else
87#define LOCKDEP_SYS_EXIT
88#endif 73#endif
89
90/*
91 * Register usage in interrupt handlers:
92 * R9 - pointer to current task structure
93 * R13 - pointer to literal pool
94 * R14 - return register for function calls
95 * R15 - kernel stack pointer
96 */
97
98 .macro UPDATE_VTIME lc_from,lc_to,lc_sum
99 lm %r10,%r11,\lc_from
100 sl %r10,\lc_to
101 sl %r11,\lc_to+4
102 bc 3,BASED(0f)
103 sl %r10,BASED(.Lc_1)
1040: al %r10,\lc_sum
105 al %r11,\lc_sum+4
106 bc 12,BASED(1f)
107 al %r10,BASED(.Lc_1)
1081: stm %r10,%r11,\lc_sum
109 .endm
110
111 .macro SAVE_ALL_SVC psworg,savearea
112 stm %r12,%r15,\savearea
113 l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13
114 l %r15,__LC_KERNEL_STACK # problem state -> load ksp
115 s %r15,BASED(.Lc_spsize) # make room for registers & psw
116 .endm
117
118 .macro SAVE_ALL_BASE savearea
119 stm %r12,%r15,\savearea
120 l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13
121 .endm 74 .endm
122 75
123 .macro SAVE_ALL_PGM psworg,savearea 76 .macro CHECK_STACK stacksize,savearea
124 tm \psworg+1,0x01 # test problem state bit
125#ifdef CONFIG_CHECK_STACK 77#ifdef CONFIG_CHECK_STACK
126 bnz BASED(1f) 78 tml %r15,\stacksize - CONFIG_STACK_GUARD
127 tml %r15,STACK_SIZE - CONFIG_STACK_GUARD 79 la %r14,\savearea
128 bnz BASED(2f) 80 jz stack_overflow
129 la %r12,\psworg
130 b BASED(stack_overflow)
131#else
132 bz BASED(2f)
133#endif 81#endif
1341: l %r15,__LC_KERNEL_STACK # problem state -> load ksp
1352: s %r15,BASED(.Lc_spsize) # make room for registers & psw
136 .endm 82 .endm
137 83
138 .macro SAVE_ALL_ASYNC psworg,savearea 84 .macro SWITCH_ASYNC savearea,stack,shift
139 stm %r12,%r15,\savearea 85 tmh %r8,0x0001 # interrupting from user ?
140 l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13 86 jnz 1f
141 la %r12,\psworg 87 lr %r14,%r9
142 tm \psworg+1,0x01 # test problem state bit 88 sl %r14,BASED(.Lcritical_start)
143 bnz BASED(1f) # from user -> load async stack 89 cl %r14,BASED(.Lcritical_length)
144 clc \psworg+4(4),BASED(.Lcritical_end) 90 jhe 0f
145 bhe BASED(0f) 91 la %r11,\savearea # inside critical section, do cleanup
146 clc \psworg+4(4),BASED(.Lcritical_start) 92 bras %r14,cleanup_critical
147 bl BASED(0f) 93 tmh %r8,0x0001 # retest problem state after cleanup
148 l %r14,BASED(.Lcleanup_critical) 94 jnz 1f
149 basr %r14,%r14 950: l %r14,\stack # are we already on the target stack?
150 tm 1(%r12),0x01 # retest problem state after cleanup
151 bnz BASED(1f)
1520: l %r14,__LC_ASYNC_STACK # are we already on the async stack ?
153 slr %r14,%r15 96 slr %r14,%r15
154 sra %r14,STACK_SHIFT 97 sra %r14,\shift
155#ifdef CONFIG_CHECK_STACK 98 jnz 1f
156 bnz BASED(1f) 99 CHECK_STACK 1<<\shift,\savearea
157 tml %r15,STACK_SIZE - CONFIG_STACK_GUARD 100 j 2f
158 bnz BASED(2f) 1011: l %r15,\stack # load target stack
159 b BASED(stack_overflow) 1022: ahi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
160#else 103 la %r11,STACK_FRAME_OVERHEAD(%r15)
161 bz BASED(2f)
162#endif
1631: l %r15,__LC_ASYNC_STACK
1642: s %r15,BASED(.Lc_spsize) # make room for registers & psw
165 .endm 104 .endm
166 105
167 .macro CREATE_STACK_FRAME savearea 106 .macro ADD64 high,low,timer
168 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) 107 al \high,\timer
169 st %r2,SP_ORIG_R2(%r15) # store original content of gpr 2 108 al \low,\timer+4
170 mvc SP_R12(16,%r15),\savearea # move %r12-%r15 to stack 109 brc 12,.+8
171 stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack 110 ahi \high,1
172 .endm 111 .endm
173 112
174 .macro RESTORE_ALL psworg,sync 113 .macro SUB64 high,low,timer
175 mvc \psworg(8),SP_PSW(%r15) # move user PSW to lowcore 114 sl \high,\timer
176 .if !\sync 115 sl \low,\timer+4
177 ni \psworg+1,0xfd # clear wait state bit 116 brc 3,.+8
178 .endif 117 ahi \high,-1
179 lm %r0,%r15,SP_R0(%r15) # load gprs 0-15 of user 118 .endm
180 stpt __LC_EXIT_TIMER 119
181 lpsw \psworg # back to caller 120 .macro UPDATE_VTIME high,low,enter_timer
121 lm \high,\low,__LC_EXIT_TIMER
122 SUB64 \high,\low,\enter_timer
123 ADD64 \high,\low,__LC_USER_TIMER
124 stm \high,\low,__LC_USER_TIMER
125 lm \high,\low,__LC_LAST_UPDATE_TIMER
126 SUB64 \high,\low,__LC_EXIT_TIMER
127 ADD64 \high,\low,__LC_SYSTEM_TIMER
128 stm \high,\low,__LC_SYSTEM_TIMER
129 mvc __LC_LAST_UPDATE_TIMER(8),\enter_timer
182 .endm 130 .endm
183 131
184 .macro REENABLE_IRQS 132 .macro REENABLE_IRQS
185 mvc __SF_EMPTY(1,%r15),SP_PSW(%r15) 133 st %r8,__LC_RETURN_PSW
186 ni __SF_EMPTY(%r15),0xbf 134 ni __LC_RETURN_PSW,0xbf
187 ssm __SF_EMPTY(%r15) 135 ssm __LC_RETURN_PSW
188 .endm 136 .endm
189 137
190 .section .kprobes.text, "ax" 138 .section .kprobes.text, "ax"
@@ -197,14 +145,13 @@ STACK_SIZE = 1 << STACK_SHIFT
197 * gpr2 = prev 145 * gpr2 = prev
198 */ 146 */
199ENTRY(__switch_to) 147ENTRY(__switch_to)
200 basr %r1,0 148 l %r4,__THREAD_info(%r2) # get thread_info of prev
2010: l %r4,__THREAD_info(%r2) # get thread_info of prev
202 l %r5,__THREAD_info(%r3) # get thread_info of next 149 l %r5,__THREAD_info(%r3) # get thread_info of next
203 tm __TI_flags+3(%r4),_TIF_MCCK_PENDING # machine check pending? 150 tm __TI_flags+3(%r4),_TIF_MCCK_PENDING # machine check pending?
204 bz 1f-0b(%r1) 151 jz 0f
205 ni __TI_flags+3(%r4),255-_TIF_MCCK_PENDING # clear flag in prev 152 ni __TI_flags+3(%r4),255-_TIF_MCCK_PENDING # clear flag in prev
206 oi __TI_flags+3(%r5),_TIF_MCCK_PENDING # set it in next 153 oi __TI_flags+3(%r5),_TIF_MCCK_PENDING # set it in next
2071: stm %r6,%r15,__SF_GPRS(%r15) # store gprs of prev task 1540: stm %r6,%r15,__SF_GPRS(%r15) # store gprs of prev task
208 st %r15,__THREAD_ksp(%r2) # store kernel stack of prev 155 st %r15,__THREAD_ksp(%r2) # store kernel stack of prev
209 l %r15,__THREAD_ksp(%r3) # load kernel stack of next 156 l %r15,__THREAD_ksp(%r3) # load kernel stack of next
210 lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4 157 lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
@@ -224,48 +171,55 @@ __critical_start:
224 171
225ENTRY(system_call) 172ENTRY(system_call)
226 stpt __LC_SYNC_ENTER_TIMER 173 stpt __LC_SYNC_ENTER_TIMER
227sysc_saveall: 174sysc_stm:
228 SAVE_ALL_SVC __LC_SVC_OLD_PSW,__LC_SAVE_AREA 175 stm %r8,%r15,__LC_SAVE_AREA_SYNC
229 CREATE_STACK_FRAME __LC_SAVE_AREA 176 l %r12,__LC_THREAD_INFO
230 l %r12,__LC_THREAD_INFO # load pointer to thread_info struct 177 l %r13,__LC_SVC_NEW_PSW+4
231 mvc SP_PSW(8,%r15),__LC_SVC_OLD_PSW 178sysc_per:
232 mvc SP_SVC_CODE(4,%r15),__LC_SVC_ILC 179 l %r15,__LC_KERNEL_STACK
233 oi __TI_flags+3(%r12),_TIF_SYSCALL 180 ahi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
181 la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs
234sysc_vtime: 182sysc_vtime:
235 UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER 183 UPDATE_VTIME %r8,%r9,__LC_SYNC_ENTER_TIMER
236sysc_stime: 184 stm %r0,%r7,__PT_R0(%r11)
237 UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER 185 mvc __PT_R8(32,%r11),__LC_SAVE_AREA_SYNC
238sysc_update: 186 mvc __PT_PSW(8,%r11),__LC_SVC_OLD_PSW
239 mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER 187 mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC
240sysc_do_svc: 188sysc_do_svc:
241 xr %r7,%r7 189 oi __TI_flags+3(%r12),_TIF_SYSCALL
242 icm %r7,3,SP_SVC_CODE+2(%r15)# load svc number and test for svc 0 190 lh %r8,__PT_INT_CODE+2(%r11)
243 bnz BASED(sysc_nr_ok) # svc number > 0 191 sla %r8,2 # shift and test for svc0
192 jnz sysc_nr_ok
244 # svc 0: system call number in %r1 193 # svc 0: system call number in %r1
245 cl %r1,BASED(.Lnr_syscalls) 194 cl %r1,BASED(.Lnr_syscalls)
246 bnl BASED(sysc_nr_ok) 195 jnl sysc_nr_ok
247 sth %r1,SP_SVC_CODE+2(%r15) 196 sth %r1,__PT_INT_CODE+2(%r11)
248 lr %r7,%r1 # copy svc number to %r7 197 lr %r8,%r1
198 sla %r8,2
249sysc_nr_ok: 199sysc_nr_ok:
250 sll %r7,2 # svc number *4 200 l %r10,BASED(.Lsys_call_table) # 31 bit system call table
251 l %r10,BASED(.Lsysc_table) 201 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
202 st %r2,__PT_ORIG_GPR2(%r11)
203 st %r7,STACK_FRAME_OVERHEAD(%r15)
204 l %r9,0(%r8,%r10) # get system call addr.
252 tm __TI_flags+2(%r12),_TIF_TRACE >> 8 205 tm __TI_flags+2(%r12),_TIF_TRACE >> 8
253 mvc SP_ARGS(4,%r15),SP_R7(%r15) 206 jnz sysc_tracesys
254 l %r8,0(%r7,%r10) # get system call addr. 207 basr %r14,%r9 # call sys_xxxx
255 bnz BASED(sysc_tracesys) 208 st %r2,__PT_R2(%r11) # store return value
256 basr %r14,%r8 # call sys_xxxx
257 st %r2,SP_R2(%r15) # store return value (change R2 on stack)
258 209
259sysc_return: 210sysc_return:
260 LOCKDEP_SYS_EXIT 211 LOCKDEP_SYS_EXIT
261sysc_tif: 212sysc_tif:
262 tm SP_PSW+1(%r15),0x01 # returning to user ? 213 tm __PT_PSW+1(%r11),0x01 # returning to user ?
263 bno BASED(sysc_restore) 214 jno sysc_restore
264 tm __TI_flags+3(%r12),_TIF_WORK_SVC 215 tm __TI_flags+3(%r12),_TIF_WORK_SVC
265 bnz BASED(sysc_work) # there is work to do (signals etc.) 216 jnz sysc_work # check for work
266 ni __TI_flags+3(%r12),255-_TIF_SYSCALL 217 ni __TI_flags+3(%r12),255-_TIF_SYSCALL
267sysc_restore: 218sysc_restore:
268 RESTORE_ALL __LC_RETURN_PSW,1 219 mvc __LC_RETURN_PSW(8),__PT_PSW(%r11)
220 stpt __LC_EXIT_TIMER
221 lm %r0,%r15,__PT_R0(%r11)
222 lpsw __LC_RETURN_PSW
269sysc_done: 223sysc_done:
270 224
271# 225#
@@ -273,16 +227,16 @@ sysc_done:
273# 227#
274sysc_work: 228sysc_work:
275 tm __TI_flags+3(%r12),_TIF_MCCK_PENDING 229 tm __TI_flags+3(%r12),_TIF_MCCK_PENDING
276 bo BASED(sysc_mcck_pending) 230 jo sysc_mcck_pending
277 tm __TI_flags+3(%r12),_TIF_NEED_RESCHED 231 tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
278 bo BASED(sysc_reschedule) 232 jo sysc_reschedule
279 tm __TI_flags+3(%r12),_TIF_SIGPENDING 233 tm __TI_flags+3(%r12),_TIF_SIGPENDING
280 bo BASED(sysc_sigpending) 234 jo sysc_sigpending
281 tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME 235 tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME
282 bo BASED(sysc_notify_resume) 236 jo sysc_notify_resume
283 tm __TI_flags+3(%r12),_TIF_PER_TRAP 237 tm __TI_flags+3(%r12),_TIF_PER_TRAP
284 bo BASED(sysc_singlestep) 238 jo sysc_singlestep
285 b BASED(sysc_return) # beware of critical section cleanup 239 j sysc_return # beware of critical section cleanup
286 240
287# 241#
288# _TIF_NEED_RESCHED is set, call schedule 242# _TIF_NEED_RESCHED is set, call schedule
@@ -290,13 +244,13 @@ sysc_work:
290sysc_reschedule: 244sysc_reschedule:
291 l %r1,BASED(.Lschedule) 245 l %r1,BASED(.Lschedule)
292 la %r14,BASED(sysc_return) 246 la %r14,BASED(sysc_return)
293 br %r1 # call scheduler 247 br %r1 # call schedule
294 248
295# 249#
296# _TIF_MCCK_PENDING is set, call handler 250# _TIF_MCCK_PENDING is set, call handler
297# 251#
298sysc_mcck_pending: 252sysc_mcck_pending:
299 l %r1,BASED(.Ls390_handle_mcck) 253 l %r1,BASED(.Lhandle_mcck)
300 la %r14,BASED(sysc_return) 254 la %r14,BASED(sysc_return)
301 br %r1 # TIF bit will be cleared by handler 255 br %r1 # TIF bit will be cleared by handler
302 256
@@ -305,23 +259,24 @@ sysc_mcck_pending:
305# 259#
306sysc_sigpending: 260sysc_sigpending:
307 ni __TI_flags+3(%r12),255-_TIF_PER_TRAP # clear TIF_PER_TRAP 261 ni __TI_flags+3(%r12),255-_TIF_PER_TRAP # clear TIF_PER_TRAP
308 la %r2,SP_PTREGS(%r15) # load pt_regs 262 lr %r2,%r11 # pass pointer to pt_regs
309 l %r1,BASED(.Ldo_signal) 263 l %r1,BASED(.Ldo_signal)
310 basr %r14,%r1 # call do_signal 264 basr %r14,%r1 # call do_signal
311 tm __TI_flags+3(%r12),_TIF_SYSCALL 265 tm __TI_flags+3(%r12),_TIF_SYSCALL
312 bno BASED(sysc_return) 266 jno sysc_return
313 lm %r2,%r6,SP_R2(%r15) # load svc arguments 267 lm %r2,%r7,__PT_R2(%r11) # load svc arguments
314 xr %r7,%r7 # svc 0 returns -ENOSYS 268 xr %r8,%r8 # svc 0 returns -ENOSYS
315 clc SP_SVC_CODE+2(2,%r15),BASED(.Lnr_syscalls+2) 269 clc __PT_INT_CODE+2(2,%r11),BASED(.Lnr_syscalls+2)
316 bnl BASED(sysc_nr_ok) # invalid svc number -> do svc 0 270 jnl sysc_nr_ok # invalid svc number -> do svc 0
317 icm %r7,3,SP_SVC_CODE+2(%r15)# load new svc number 271 lh %r8,__PT_INT_CODE+2(%r11) # load new svc number
318 b BASED(sysc_nr_ok) # restart svc 272 sla %r8,2
273 j sysc_nr_ok # restart svc
319 274
320# 275#
321# _TIF_NOTIFY_RESUME is set, call do_notify_resume 276# _TIF_NOTIFY_RESUME is set, call do_notify_resume
322# 277#
323sysc_notify_resume: 278sysc_notify_resume:
324 la %r2,SP_PTREGS(%r15) # load pt_regs 279 lr %r2,%r11 # pass pointer to pt_regs
325 l %r1,BASED(.Ldo_notify_resume) 280 l %r1,BASED(.Ldo_notify_resume)
326 la %r14,BASED(sysc_return) 281 la %r14,BASED(sysc_return)
327 br %r1 # call do_notify_resume 282 br %r1 # call do_notify_resume
@@ -331,56 +286,57 @@ sysc_notify_resume:
331# 286#
332sysc_singlestep: 287sysc_singlestep:
333 ni __TI_flags+3(%r12),255-(_TIF_SYSCALL | _TIF_PER_TRAP) 288 ni __TI_flags+3(%r12),255-(_TIF_SYSCALL | _TIF_PER_TRAP)
334 la %r2,SP_PTREGS(%r15) # address of register-save area 289 lr %r2,%r11 # pass pointer to pt_regs
335 l %r1,BASED(.Lhandle_per) # load adr. of per handler 290 l %r1,BASED(.Ldo_per_trap)
336 la %r14,BASED(sysc_return) # load adr. of system return 291 la %r14,BASED(sysc_return)
337 br %r1 # branch to do_per_trap 292 br %r1 # call do_per_trap
338 293
339# 294#
340# call tracehook_report_syscall_entry/tracehook_report_syscall_exit before 295# call tracehook_report_syscall_entry/tracehook_report_syscall_exit before
341# and after the system call 296# and after the system call
342# 297#
343sysc_tracesys: 298sysc_tracesys:
344 l %r1,BASED(.Ltrace_entry) 299 l %r1,BASED(.Ltrace_enter)
345 la %r2,SP_PTREGS(%r15) # load pt_regs 300 lr %r2,%r11 # pass pointer to pt_regs
346 la %r3,0 301 la %r3,0
347 xr %r0,%r0 302 xr %r0,%r0
348 icm %r0,3,SP_SVC_CODE(%r15) 303 icm %r0,3,__PT_INT_CODE+2(%r11)
349 st %r0,SP_R2(%r15) 304 st %r0,__PT_R2(%r11)
350 basr %r14,%r1 305 basr %r14,%r1 # call do_syscall_trace_enter
351 cl %r2,BASED(.Lnr_syscalls) 306 cl %r2,BASED(.Lnr_syscalls)
352 bnl BASED(sysc_tracenogo) 307 jnl sysc_tracenogo
353 lr %r7,%r2 308 lr %r8,%r2
354 sll %r7,2 # svc number *4 309 sll %r8,2
355 l %r8,0(%r7,%r10) 310 l %r9,0(%r8,%r10)
356sysc_tracego: 311sysc_tracego:
357 lm %r3,%r6,SP_R3(%r15) 312 lm %r3,%r7,__PT_R3(%r11)
358 mvc SP_ARGS(4,%r15),SP_R7(%r15) 313 st %r7,STACK_FRAME_OVERHEAD(%r15)
359 l %r2,SP_ORIG_R2(%r15) 314 l %r2,__PT_ORIG_GPR2(%r11)
360 basr %r14,%r8 # call sys_xxx 315 basr %r14,%r9 # call sys_xxx
361 st %r2,SP_R2(%r15) # store return value 316 st %r2,__PT_R2(%r11) # store return value
362sysc_tracenogo: 317sysc_tracenogo:
363 tm __TI_flags+2(%r12),_TIF_TRACE >> 8 318 tm __TI_flags+2(%r12),_TIF_TRACE >> 8
364 bz BASED(sysc_return) 319 jz sysc_return
365 l %r1,BASED(.Ltrace_exit) 320 l %r1,BASED(.Ltrace_exit)
366 la %r2,SP_PTREGS(%r15) # load pt_regs 321 lr %r2,%r11 # pass pointer to pt_regs
367 la %r14,BASED(sysc_return) 322 la %r14,BASED(sysc_return)
368 br %r1 323 br %r1 # call do_syscall_trace_exit
369 324
370# 325#
371# a new process exits the kernel with ret_from_fork 326# a new process exits the kernel with ret_from_fork
372# 327#
373ENTRY(ret_from_fork) 328ENTRY(ret_from_fork)
329 la %r11,STACK_FRAME_OVERHEAD(%r15)
330 l %r12,__LC_THREAD_INFO
374 l %r13,__LC_SVC_NEW_PSW+4 331 l %r13,__LC_SVC_NEW_PSW+4
375 l %r12,__LC_THREAD_INFO # load pointer to thread_info struct 332 tm __PT_PSW+1(%r11),0x01 # forking a kernel thread ?
376 tm SP_PSW+1(%r15),0x01 # forking a kernel thread ? 333 jo 0f
377 bo BASED(0f) 334 st %r15,__PT_R15(%r11) # store stack pointer for new kthread
378 st %r15,SP_R15(%r15) # store stack pointer for new kthread 3350: l %r1,BASED(.Lschedule_tail)
3790: l %r1,BASED(.Lschedtail) 336 basr %r14,%r1 # call schedule_tail
380 basr %r14,%r1
381 TRACE_IRQS_ON 337 TRACE_IRQS_ON
382 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts 338 ssm __LC_SVC_NEW_PSW # reenable interrupts
383 b BASED(sysc_tracenogo) 339 j sysc_tracenogo
384 340
385# 341#
386# kernel_execve function needs to deal with pt_regs that is not 342# kernel_execve function needs to deal with pt_regs that is not
@@ -390,153 +346,98 @@ ENTRY(kernel_execve)
390 stm %r12,%r15,48(%r15) 346 stm %r12,%r15,48(%r15)
391 lr %r14,%r15 347 lr %r14,%r15
392 l %r13,__LC_SVC_NEW_PSW+4 348 l %r13,__LC_SVC_NEW_PSW+4
393 s %r15,BASED(.Lc_spsize) 349 ahi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
394 st %r14,__SF_BACKCHAIN(%r15) 350 st %r14,__SF_BACKCHAIN(%r15)
395 la %r12,SP_PTREGS(%r15) 351 la %r12,STACK_FRAME_OVERHEAD(%r15)
396 xc 0(__PT_SIZE,%r12),0(%r12) 352 xc 0(__PT_SIZE,%r12),0(%r12)
397 l %r1,BASED(.Ldo_execve) 353 l %r1,BASED(.Ldo_execve)
398 lr %r5,%r12 354 lr %r5,%r12
399 basr %r14,%r1 355 basr %r14,%r1 # call do_execve
400 ltr %r2,%r2 356 ltr %r2,%r2
401 be BASED(0f) 357 je 0f
402 a %r15,BASED(.Lc_spsize) 358 ahi %r15,(STACK_FRAME_OVERHEAD + __PT_SIZE)
403 lm %r12,%r15,48(%r15) 359 lm %r12,%r15,48(%r15)
404 br %r14 360 br %r14
405 # execve succeeded. 361 # execve succeeded.
4060: stnsm __SF_EMPTY(%r15),0xfc # disable interrupts 3620: ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
407 l %r15,__LC_KERNEL_STACK # load ksp 363 l %r15,__LC_KERNEL_STACK # load ksp
408 s %r15,BASED(.Lc_spsize) # make room for registers & psw 364 ahi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
409 mvc SP_PTREGS(__PT_SIZE,%r15),0(%r12) # copy pt_regs 365 la %r11,STACK_FRAME_OVERHEAD(%r15)
366 mvc 0(__PT_SIZE,%r11),0(%r12) # copy pt_regs
410 l %r12,__LC_THREAD_INFO 367 l %r12,__LC_THREAD_INFO
411 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) 368 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
412 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts 369 ssm __LC_SVC_NEW_PSW # reenable interrupts
413 l %r1,BASED(.Lexecve_tail) 370 l %r1,BASED(.Lexecve_tail)
414 basr %r14,%r1 371 basr %r14,%r1 # call execve_tail
415 b BASED(sysc_return) 372 j sysc_return
416 373
417/* 374/*
418 * Program check handler routine 375 * Program check handler routine
419 */ 376 */
420 377
421ENTRY(pgm_check_handler) 378ENTRY(pgm_check_handler)
422/*
423 * First we need to check for a special case:
424 * Single stepping an instruction that disables the PER event mask will
425 * cause a PER event AFTER the mask has been set. Example: SVC or LPSW.
426 * For a single stepped SVC the program check handler gets control after
427 * the SVC new PSW has been loaded. But we want to execute the SVC first and
428 * then handle the PER event. Therefore we update the SVC old PSW to point
429 * to the pgm_check_handler and branch to the SVC handler after we checked
430 * if we have to load the kernel stack register.
431 * For every other possible cause for PER event without the PER mask set
432 * we just ignore the PER event (FIXME: is there anything we have to do
433 * for LPSW?).
434 */
435 stpt __LC_SYNC_ENTER_TIMER 379 stpt __LC_SYNC_ENTER_TIMER
436 SAVE_ALL_BASE __LC_SAVE_AREA 380 stm %r8,%r15,__LC_SAVE_AREA_SYNC
437 tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception 381 l %r12,__LC_THREAD_INFO
438 bnz BASED(pgm_per) # got per exception -> special case 382 l %r13,__LC_SVC_NEW_PSW+4
439 SAVE_ALL_PGM __LC_PGM_OLD_PSW,__LC_SAVE_AREA 383 lm %r8,%r9,__LC_PGM_OLD_PSW
440 CREATE_STACK_FRAME __LC_SAVE_AREA 384 tmh %r8,0x0001 # test problem state bit
441 mvc SP_PSW(8,%r15),__LC_PGM_OLD_PSW 385 jnz 1f # -> fault in user space
442 l %r12,__LC_THREAD_INFO # load pointer to thread_info struct 386 tmh %r8,0x4000 # PER bit set in old PSW ?
443 tm SP_PSW+1(%r15),0x01 # interrupting from user ? 387 jnz 0f # -> enabled, can't be a double fault
444 bz BASED(pgm_no_vtime) 388 tm __LC_PGM_ILC+3,0x80 # check for per exception
445 UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER 389 jnz pgm_svcper # -> single stepped svc
446 UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER 3900: CHECK_STACK STACK_SIZE,__LC_SAVE_AREA_SYNC
447 mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER 391 j 2f
448pgm_no_vtime: 3921: UPDATE_VTIME %r14,%r15,__LC_SYNC_ENTER_TIMER
449 l %r3,__LC_PGM_ILC # load program interruption code 393 l %r15,__LC_KERNEL_STACK
450 l %r4,__LC_TRANS_EXC_CODE 3942: ahi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
451 REENABLE_IRQS 395 la %r11,STACK_FRAME_OVERHEAD(%r15)
452 la %r8,0x7f 396 stm %r0,%r7,__PT_R0(%r11)
453 nr %r8,%r3 397 mvc __PT_R8(32,%r11),__LC_SAVE_AREA_SYNC
454 sll %r8,2 398 stm %r8,%r9,__PT_PSW(%r11)
455 l %r1,BASED(.Ljump_table) 399 mvc __PT_INT_CODE(4,%r11),__LC_PGM_ILC
456 l %r1,0(%r8,%r1) # load address of handler routine 400 mvc __PT_INT_PARM_LONG(4,%r11),__LC_TRANS_EXC_CODE
457 la %r2,SP_PTREGS(%r15) # address of register-save area 401 tm __LC_PGM_ILC+3,0x80 # check for per exception
458 basr %r14,%r1 # branch to interrupt-handler 402 jz 0f
459pgm_exit:
460 b BASED(sysc_return)
461
462#
463# handle per exception
464#
465pgm_per:
466 tm __LC_PGM_OLD_PSW,0x40 # test if per event recording is on
467 bnz BASED(pgm_per_std) # ok, normal per event from user space
468# ok its one of the special cases, now we need to find out which one
469 clc __LC_PGM_OLD_PSW(8),__LC_SVC_NEW_PSW
470 be BASED(pgm_svcper)
471# no interesting special case, ignore PER event
472 lm %r12,%r15,__LC_SAVE_AREA
473 lpsw 0x28
474
475#
476# Normal per exception
477#
478pgm_per_std:
479 SAVE_ALL_PGM __LC_PGM_OLD_PSW,__LC_SAVE_AREA
480 CREATE_STACK_FRAME __LC_SAVE_AREA
481 mvc SP_PSW(8,%r15),__LC_PGM_OLD_PSW
482 l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
483 tm SP_PSW+1(%r15),0x01 # interrupting from user ?
484 bz BASED(pgm_no_vtime2)
485 UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
486 UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
487 mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
488pgm_no_vtime2:
489 l %r1,__TI_task(%r12) 403 l %r1,__TI_task(%r12)
490 tm SP_PSW+1(%r15),0x01 # kernel per event ? 404 tmh %r8,0x0001 # kernel per event ?
491 bz BASED(kernel_per) 405 jz pgm_kprobe
492 mvc __THREAD_per_cause(2,%r1),__LC_PER_CAUSE 406 oi __TI_flags+3(%r12),_TIF_PER_TRAP
493 mvc __THREAD_per_address(4,%r1),__LC_PER_ADDRESS 407 mvc __THREAD_per_address(4,%r1),__LC_PER_ADDRESS
408 mvc __THREAD_per_cause(2,%r1),__LC_PER_CAUSE
494 mvc __THREAD_per_paid(1,%r1),__LC_PER_PAID 409 mvc __THREAD_per_paid(1,%r1),__LC_PER_PAID
495 oi __TI_flags+3(%r12),_TIF_PER_TRAP # set TIF_PER_TRAP 4100: REENABLE_IRQS
496 l %r3,__LC_PGM_ILC # load program interruption code 411 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
497 l %r4,__LC_TRANS_EXC_CODE
498 REENABLE_IRQS
499 la %r8,0x7f
500 nr %r8,%r3 # clear per-event-bit and ilc
501 be BASED(pgm_exit2) # only per or per+check ?
502 sll %r8,2
503 l %r1,BASED(.Ljump_table) 412 l %r1,BASED(.Ljump_table)
504 l %r1,0(%r8,%r1) # load address of handler routine 413 la %r10,0x7f
505 la %r2,SP_PTREGS(%r15) # address of register-save area 414 n %r10,__PT_INT_CODE(%r11)
415 je sysc_return
416 sll %r10,2
417 l %r1,0(%r10,%r1) # load address of handler routine
418 lr %r2,%r11 # pass pointer to pt_regs
506 basr %r14,%r1 # branch to interrupt-handler 419 basr %r14,%r1 # branch to interrupt-handler
507pgm_exit2: 420 j sysc_return
508 b BASED(sysc_return)
509 421
510# 422#
511# it was a single stepped SVC that is causing all the trouble 423# PER event in supervisor state, must be kprobes
512# 424#
513pgm_svcper: 425pgm_kprobe:
514 SAVE_ALL_PGM __LC_SVC_OLD_PSW,__LC_SAVE_AREA 426 REENABLE_IRQS
515 CREATE_STACK_FRAME __LC_SAVE_AREA 427 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
516 l %r12,__LC_THREAD_INFO # load pointer to thread_info struct 428 l %r1,BASED(.Ldo_per_trap)
517 mvc SP_PSW(8,%r15),__LC_SVC_OLD_PSW 429 lr %r2,%r11 # pass pointer to pt_regs
518 mvc SP_SVC_CODE(4,%r15),__LC_SVC_ILC 430 basr %r14,%r1 # call do_per_trap
519 oi __TI_flags+3(%r12),(_TIF_SYSCALL | _TIF_PER_TRAP) 431 j sysc_return
520 UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
521 UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
522 mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
523 l %r8,__TI_task(%r12)
524 mvc __THREAD_per_cause(2,%r8),__LC_PER_CAUSE
525 mvc __THREAD_per_address(4,%r8),__LC_PER_ADDRESS
526 mvc __THREAD_per_paid(1,%r8),__LC_PER_PAID
527 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
528 lm %r2,%r6,SP_R2(%r15) # load svc arguments
529 b BASED(sysc_do_svc)
530 432
531# 433#
532# per was called from kernel, must be kprobes 434# single stepped system call
533# 435#
534kernel_per: 436pgm_svcper:
535 REENABLE_IRQS 437 oi __TI_flags+3(%r12),_TIF_PER_TRAP
536 la %r2,SP_PTREGS(%r15) # address of register-save area 438 mvc __LC_RETURN_PSW(4),__LC_SVC_NEW_PSW
537 l %r1,BASED(.Lhandle_per) # load adr. of per handler 439 mvc __LC_RETURN_PSW+4(4),BASED(.Lsysc_per)
538 basr %r14,%r1 # branch to do_single_step 440 lpsw __LC_RETURN_PSW # branch to sysc_per and enable irqs
539 b BASED(pgm_exit)
540 441
541/* 442/*
542 * IO interrupt handler routine 443 * IO interrupt handler routine
@@ -545,28 +446,35 @@ kernel_per:
545ENTRY(io_int_handler) 446ENTRY(io_int_handler)
546 stck __LC_INT_CLOCK 447 stck __LC_INT_CLOCK
547 stpt __LC_ASYNC_ENTER_TIMER 448 stpt __LC_ASYNC_ENTER_TIMER
548 SAVE_ALL_ASYNC __LC_IO_OLD_PSW,__LC_SAVE_AREA+16 449 stm %r8,%r15,__LC_SAVE_AREA_ASYNC
549 CREATE_STACK_FRAME __LC_SAVE_AREA+16 450 l %r12,__LC_THREAD_INFO
550 mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack 451 l %r13,__LC_SVC_NEW_PSW+4
551 l %r12,__LC_THREAD_INFO # load pointer to thread_info struct 452 lm %r8,%r9,__LC_IO_OLD_PSW
552 tm SP_PSW+1(%r15),0x01 # interrupting from user ? 453 tmh %r8,0x0001 # interrupting from user ?
553 bz BASED(io_no_vtime) 454 jz io_skip
554 UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER 455 UPDATE_VTIME %r14,%r15,__LC_ASYNC_ENTER_TIMER
555 UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER 456io_skip:
556 mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER 457 SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_STACK,STACK_SHIFT
557io_no_vtime: 458 stm %r0,%r7,__PT_R0(%r11)
459 mvc __PT_R8(32,%r11),__LC_SAVE_AREA_ASYNC
460 stm %r8,%r9,__PT_PSW(%r11)
558 TRACE_IRQS_OFF 461 TRACE_IRQS_OFF
559 l %r1,BASED(.Ldo_IRQ) # load address of do_IRQ 462 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
560 la %r2,SP_PTREGS(%r15) # address of register-save area 463 l %r1,BASED(.Ldo_IRQ)
561 basr %r14,%r1 # branch to standard irq handler 464 lr %r2,%r11 # pass pointer to pt_regs
465 basr %r14,%r1 # call do_IRQ
562io_return: 466io_return:
563 LOCKDEP_SYS_EXIT 467 LOCKDEP_SYS_EXIT
564 TRACE_IRQS_ON 468 TRACE_IRQS_ON
565io_tif: 469io_tif:
566 tm __TI_flags+3(%r12),_TIF_WORK_INT 470 tm __TI_flags+3(%r12),_TIF_WORK_INT
567 bnz BASED(io_work) # there is work to do (signals etc.) 471 jnz io_work # there is work to do (signals etc.)
568io_restore: 472io_restore:
569 RESTORE_ALL __LC_RETURN_PSW,0 473 mvc __LC_RETURN_PSW(8),__PT_PSW(%r11)
474 ni __LC_RETURN_PSW+1,0xfd # clean wait state bit
475 stpt __LC_EXIT_TIMER
476 lm %r0,%r15,__PT_R0(%r11)
477 lpsw __LC_RETURN_PSW
570io_done: 478io_done:
571 479
572# 480#
@@ -577,28 +485,29 @@ io_done:
577# Before any work can be done, a switch to the kernel stack is required. 485# Before any work can be done, a switch to the kernel stack is required.
578# 486#
579io_work: 487io_work:
580 tm SP_PSW+1(%r15),0x01 # returning to user ? 488 tm __PT_PSW+1(%r11),0x01 # returning to user ?
581 bo BASED(io_work_user) # yes -> do resched & signal 489 jo io_work_user # yes -> do resched & signal
582#ifdef CONFIG_PREEMPT 490#ifdef CONFIG_PREEMPT
583 # check for preemptive scheduling 491 # check for preemptive scheduling
584 icm %r0,15,__TI_precount(%r12) 492 icm %r0,15,__TI_precount(%r12)
585 bnz BASED(io_restore) # preemption disabled 493 jnz io_restore # preemption disabled
586 tm __TI_flags+3(%r12),_TIF_NEED_RESCHED 494 tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
587 bno BASED(io_restore) 495 jno io_restore
588 # switch to kernel stack 496 # switch to kernel stack
589 l %r1,SP_R15(%r15) 497 l %r1,__PT_R15(%r11)
590 s %r1,BASED(.Lc_spsize) 498 ahi %r1,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
591 mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15) 499 mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
592 xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain 500 xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1)
501 la %r11,STACK_FRAME_OVERHEAD(%r1)
593 lr %r15,%r1 502 lr %r15,%r1
594 # TRACE_IRQS_ON already done at io_return, call 503 # TRACE_IRQS_ON already done at io_return, call
595 # TRACE_IRQS_OFF to keep things symmetrical 504 # TRACE_IRQS_OFF to keep things symmetrical
596 TRACE_IRQS_OFF 505 TRACE_IRQS_OFF
597 l %r1,BASED(.Lpreempt_schedule_irq) 506 l %r1,BASED(.Lpreempt_irq)
598 basr %r14,%r1 # call preempt_schedule_irq 507 basr %r14,%r1 # call preempt_schedule_irq
599 b BASED(io_return) 508 j io_return
600#else 509#else
601 b BASED(io_restore) 510 j io_restore
602#endif 511#endif
603 512
604# 513#
@@ -606,9 +515,10 @@ io_work:
606# 515#
607io_work_user: 516io_work_user:
608 l %r1,__LC_KERNEL_STACK 517 l %r1,__LC_KERNEL_STACK
609 s %r1,BASED(.Lc_spsize) 518 ahi %r1,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
610 mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15) 519 mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
611 xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain 520 xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1)
521 la %r11,STACK_FRAME_OVERHEAD(%r1)
612 lr %r15,%r1 522 lr %r15,%r1
613 523
614# 524#
@@ -618,24 +528,24 @@ io_work_user:
618# 528#
619io_work_tif: 529io_work_tif:
620 tm __TI_flags+3(%r12),_TIF_MCCK_PENDING 530 tm __TI_flags+3(%r12),_TIF_MCCK_PENDING
621 bo BASED(io_mcck_pending) 531 jo io_mcck_pending
622 tm __TI_flags+3(%r12),_TIF_NEED_RESCHED 532 tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
623 bo BASED(io_reschedule) 533 jo io_reschedule
624 tm __TI_flags+3(%r12),_TIF_SIGPENDING 534 tm __TI_flags+3(%r12),_TIF_SIGPENDING
625 bo BASED(io_sigpending) 535 jo io_sigpending
626 tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME 536 tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME
627 bo BASED(io_notify_resume) 537 jo io_notify_resume
628 b BASED(io_return) # beware of critical section cleanup 538 j io_return # beware of critical section cleanup
629 539
630# 540#
631# _TIF_MCCK_PENDING is set, call handler 541# _TIF_MCCK_PENDING is set, call handler
632# 542#
633io_mcck_pending: 543io_mcck_pending:
634 # TRACE_IRQS_ON already done at io_return 544 # TRACE_IRQS_ON already done at io_return
635 l %r1,BASED(.Ls390_handle_mcck) 545 l %r1,BASED(.Lhandle_mcck)
636 basr %r14,%r1 # TIF bit will be cleared by handler 546 basr %r14,%r1 # TIF bit will be cleared by handler
637 TRACE_IRQS_OFF 547 TRACE_IRQS_OFF
638 b BASED(io_return) 548 j io_return
639 549
640# 550#
641# _TIF_NEED_RESCHED is set, call schedule 551# _TIF_NEED_RESCHED is set, call schedule
@@ -643,37 +553,37 @@ io_mcck_pending:
643io_reschedule: 553io_reschedule:
644 # TRACE_IRQS_ON already done at io_return 554 # TRACE_IRQS_ON already done at io_return
645 l %r1,BASED(.Lschedule) 555 l %r1,BASED(.Lschedule)
646 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts 556 ssm __LC_SVC_NEW_PSW # reenable interrupts
647 basr %r14,%r1 # call scheduler 557 basr %r14,%r1 # call scheduler
648 stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts 558 ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
649 TRACE_IRQS_OFF 559 TRACE_IRQS_OFF
650 b BASED(io_return) 560 j io_return
651 561
652# 562#
653# _TIF_SIGPENDING is set, call do_signal 563# _TIF_SIGPENDING is set, call do_signal
654# 564#
655io_sigpending: 565io_sigpending:
656 # TRACE_IRQS_ON already done at io_return 566 # TRACE_IRQS_ON already done at io_return
657 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
658 la %r2,SP_PTREGS(%r15) # load pt_regs
659 l %r1,BASED(.Ldo_signal) 567 l %r1,BASED(.Ldo_signal)
568 ssm __LC_SVC_NEW_PSW # reenable interrupts
569 lr %r2,%r11 # pass pointer to pt_regs
660 basr %r14,%r1 # call do_signal 570 basr %r14,%r1 # call do_signal
661 stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts 571 ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
662 TRACE_IRQS_OFF 572 TRACE_IRQS_OFF
663 b BASED(io_return) 573 j io_return
664 574
665# 575#
666# _TIF_SIGPENDING is set, call do_signal 576# _TIF_SIGPENDING is set, call do_signal
667# 577#
668io_notify_resume: 578io_notify_resume:
669 # TRACE_IRQS_ON already done at io_return 579 # TRACE_IRQS_ON already done at io_return
670 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
671 la %r2,SP_PTREGS(%r15) # load pt_regs
672 l %r1,BASED(.Ldo_notify_resume) 580 l %r1,BASED(.Ldo_notify_resume)
673 basr %r14,%r1 # call do_signal 581 ssm __LC_SVC_NEW_PSW # reenable interrupts
674 stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts 582 lr %r2,%r11 # pass pointer to pt_regs
583 basr %r14,%r1 # call do_notify_resume
584 ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
675 TRACE_IRQS_OFF 585 TRACE_IRQS_OFF
676 b BASED(io_return) 586 j io_return
677 587
678/* 588/*
679 * External interrupt handler routine 589 * External interrupt handler routine
@@ -682,23 +592,25 @@ io_notify_resume:
682ENTRY(ext_int_handler) 592ENTRY(ext_int_handler)
683 stck __LC_INT_CLOCK 593 stck __LC_INT_CLOCK
684 stpt __LC_ASYNC_ENTER_TIMER 594 stpt __LC_ASYNC_ENTER_TIMER
685 SAVE_ALL_ASYNC __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16 595 stm %r8,%r15,__LC_SAVE_AREA_ASYNC
686 CREATE_STACK_FRAME __LC_SAVE_AREA+16 596 l %r12,__LC_THREAD_INFO
687 mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack 597 l %r13,__LC_SVC_NEW_PSW+4
688 l %r12,__LC_THREAD_INFO # load pointer to thread_info struct 598 lm %r8,%r9,__LC_EXT_OLD_PSW
689 tm SP_PSW+1(%r15),0x01 # interrupting from user ? 599 tmh %r8,0x0001 # interrupting from user ?
690 bz BASED(ext_no_vtime) 600 jz ext_skip
691 UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER 601 UPDATE_VTIME %r14,%r15,__LC_ASYNC_ENTER_TIMER
692 UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER 602ext_skip:
693 mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER 603 SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_STACK,STACK_SHIFT
694ext_no_vtime: 604 stm %r0,%r7,__PT_R0(%r11)
605 mvc __PT_R8(32,%r11),__LC_SAVE_AREA_ASYNC
606 stm %r8,%r9,__PT_PSW(%r11)
695 TRACE_IRQS_OFF 607 TRACE_IRQS_OFF
696 la %r2,SP_PTREGS(%r15) # address of register-save area 608 lr %r2,%r11 # pass pointer to pt_regs
697 l %r3,__LC_CPU_ADDRESS # get cpu address + interruption code 609 l %r3,__LC_CPU_ADDRESS # get cpu address + interruption code
698 l %r4,__LC_EXT_PARAMS # get external parameters 610 l %r4,__LC_EXT_PARAMS # get external parameters
699 l %r1,BASED(.Ldo_extint) 611 l %r1,BASED(.Ldo_extint)
700 basr %r14,%r1 612 basr %r14,%r1 # call do_extint
701 b BASED(io_return) 613 j io_return
702 614
703__critical_end: 615__critical_end:
704 616
@@ -710,82 +622,74 @@ ENTRY(mcck_int_handler)
710 stck __LC_MCCK_CLOCK 622 stck __LC_MCCK_CLOCK
711 spt __LC_CPU_TIMER_SAVE_AREA # revalidate cpu timer 623 spt __LC_CPU_TIMER_SAVE_AREA # revalidate cpu timer
712 lm %r0,%r15,__LC_GPREGS_SAVE_AREA # revalidate gprs 624 lm %r0,%r15,__LC_GPREGS_SAVE_AREA # revalidate gprs
713 SAVE_ALL_BASE __LC_SAVE_AREA+32 625 l %r12,__LC_THREAD_INFO
714 la %r12,__LC_MCK_OLD_PSW 626 l %r13,__LC_SVC_NEW_PSW+4
627 lm %r8,%r9,__LC_MCK_OLD_PSW
715 tm __LC_MCCK_CODE,0x80 # system damage? 628 tm __LC_MCCK_CODE,0x80 # system damage?
716 bo BASED(mcck_int_main) # yes -> rest of mcck code invalid 629 jo mcck_panic # yes -> rest of mcck code invalid
717 mvc __LC_MCCK_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA 630 la %r14,__LC_CPU_TIMER_SAVE_AREA
631 mvc __LC_MCCK_ENTER_TIMER(8),0(%r14)
718 tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid? 632 tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid?
719 bo BASED(1f) 633 jo 3f
720 la %r14,__LC_SYNC_ENTER_TIMER 634 la %r14,__LC_SYNC_ENTER_TIMER
721 clc 0(8,%r14),__LC_ASYNC_ENTER_TIMER 635 clc 0(8,%r14),__LC_ASYNC_ENTER_TIMER
722 bl BASED(0f) 636 jl 0f
723 la %r14,__LC_ASYNC_ENTER_TIMER 637 la %r14,__LC_ASYNC_ENTER_TIMER
7240: clc 0(8,%r14),__LC_EXIT_TIMER 6380: clc 0(8,%r14),__LC_EXIT_TIMER
725 bl BASED(0f) 639 jl 1f
726 la %r14,__LC_EXIT_TIMER 640 la %r14,__LC_EXIT_TIMER
7270: clc 0(8,%r14),__LC_LAST_UPDATE_TIMER 6411: clc 0(8,%r14),__LC_LAST_UPDATE_TIMER
728 bl BASED(0f) 642 jl 2f
729 la %r14,__LC_LAST_UPDATE_TIMER 643 la %r14,__LC_LAST_UPDATE_TIMER
7300: spt 0(%r14) 6442: spt 0(%r14)
731 mvc __LC_MCCK_ENTER_TIMER(8),0(%r14) 645 mvc __LC_MCCK_ENTER_TIMER(8),0(%r14)
7321: tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid? 6463: tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
733 bno BASED(mcck_int_main) # no -> skip cleanup critical 647 jno mcck_panic # no -> skip cleanup critical
734 tm __LC_MCK_OLD_PSW+1,0x01 # test problem state bit 648 tm %r8,0x0001 # interrupting from user ?
735 bnz BASED(mcck_int_main) # from user -> load async stack 649 jz mcck_skip
736 clc __LC_MCK_OLD_PSW+4(4),BASED(.Lcritical_end) 650 UPDATE_VTIME %r14,%r15,__LC_MCCK_ENTER_TIMER
737 bhe BASED(mcck_int_main) 651mcck_skip:
738 clc __LC_MCK_OLD_PSW+4(4),BASED(.Lcritical_start) 652 SWITCH_ASYNC __LC_GPREGS_SAVE_AREA+32,__LC_PANIC_STACK,PAGE_SHIFT
739 bl BASED(mcck_int_main) 653 mvc __PT_R0(64,%r11),__LC_GPREGS_SAVE_AREA
740 l %r14,BASED(.Lcleanup_critical) 654 stm %r8,%r9,__PT_PSW(%r11)
741 basr %r14,%r14 655 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
742mcck_int_main: 656 l %r1,BASED(.Ldo_machine_check)
743 l %r14,__LC_PANIC_STACK # are we already on the panic stack? 657 lr %r2,%r11 # pass pointer to pt_regs
744 slr %r14,%r15 658 basr %r14,%r1 # call s390_do_machine_check
745 sra %r14,PAGE_SHIFT 659 tm __PT_PSW+1(%r11),0x01 # returning to user ?
746 be BASED(0f) 660 jno mcck_return
747 l %r15,__LC_PANIC_STACK # load panic stack
7480: s %r15,BASED(.Lc_spsize) # make room for registers & psw
749 CREATE_STACK_FRAME __LC_SAVE_AREA+32
750 mvc SP_PSW(8,%r15),0(%r12)
751 l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
752 tm __LC_MCCK_CODE+2,0x08 # mwp of old psw valid?
753 bno BASED(mcck_no_vtime) # no -> skip cleanup critical
754 tm SP_PSW+1(%r15),0x01 # interrupting from user ?
755 bz BASED(mcck_no_vtime)
756 UPDATE_VTIME __LC_EXIT_TIMER,__LC_MCCK_ENTER_TIMER,__LC_USER_TIMER
757 UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
758 mvc __LC_LAST_UPDATE_TIMER(8),__LC_MCCK_ENTER_TIMER
759mcck_no_vtime:
760 la %r2,SP_PTREGS(%r15) # load pt_regs
761 l %r1,BASED(.Ls390_mcck)
762 basr %r14,%r1 # call machine check handler
763 tm SP_PSW+1(%r15),0x01 # returning to user ?
764 bno BASED(mcck_return)
765 l %r1,__LC_KERNEL_STACK # switch to kernel stack 661 l %r1,__LC_KERNEL_STACK # switch to kernel stack
766 s %r1,BASED(.Lc_spsize) 662 ahi %r1,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
767 mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15) 663 mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
768 xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain 664 xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1)
665 la %r11,STACK_FRAME_OVERHEAD(%r15)
769 lr %r15,%r1 666 lr %r15,%r1
770 stosm __SF_EMPTY(%r15),0x04 # turn dat on 667 ssm __LC_PGM_NEW_PSW # turn dat on, keep irqs off
771 tm __TI_flags+3(%r12),_TIF_MCCK_PENDING 668 tm __TI_flags+3(%r12),_TIF_MCCK_PENDING
772 bno BASED(mcck_return) 669 jno mcck_return
773 TRACE_IRQS_OFF 670 TRACE_IRQS_OFF
774 l %r1,BASED(.Ls390_handle_mcck) 671 l %r1,BASED(.Lhandle_mcck)
775 basr %r14,%r1 # call machine check handler 672 basr %r14,%r1 # call s390_handle_mcck
776 TRACE_IRQS_ON 673 TRACE_IRQS_ON
777mcck_return: 674mcck_return:
778 mvc __LC_RETURN_MCCK_PSW(8),SP_PSW(%r15) # move return PSW 675 mvc __LC_RETURN_MCCK_PSW(8),__PT_PSW(%r11) # move return PSW
779 ni __LC_RETURN_MCCK_PSW+1,0xfd # clear wait state bit 676 ni __LC_RETURN_MCCK_PSW+1,0xfd # clear wait state bit
780 tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ? 677 tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ?
781 bno BASED(0f) 678 jno 0f
782 lm %r0,%r15,SP_R0(%r15) # load gprs 0-15 679 lm %r0,%r15,__PT_R0(%r11)
783 stpt __LC_EXIT_TIMER 680 stpt __LC_EXIT_TIMER
784 lpsw __LC_RETURN_MCCK_PSW # back to caller 681 lpsw __LC_RETURN_MCCK_PSW
7850: lm %r0,%r15,SP_R0(%r15) # load gprs 0-15 6820: lm %r0,%r15,__PT_R0(%r11)
786 lpsw __LC_RETURN_MCCK_PSW # back to caller 683 lpsw __LC_RETURN_MCCK_PSW
787 684
788 RESTORE_ALL __LC_RETURN_MCCK_PSW,0 685mcck_panic:
686 l %r14,__LC_PANIC_STACK
687 slr %r14,%r15
688 sra %r14,PAGE_SHIFT
689 jz 0f
690 l %r15,__LC_PANIC_STACK
6910: ahi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
692 j mcck_skip
789 693
790/* 694/*
791 * Restart interruption handler, kick starter for additional CPUs 695 * Restart interruption handler, kick starter for additional CPUs
@@ -799,18 +703,18 @@ restart_base:
799 stck __LC_LAST_UPDATE_CLOCK 703 stck __LC_LAST_UPDATE_CLOCK
800 mvc __LC_LAST_UPDATE_TIMER(8),restart_vtime-restart_base(%r1) 704 mvc __LC_LAST_UPDATE_TIMER(8),restart_vtime-restart_base(%r1)
801 mvc __LC_EXIT_TIMER(8),restart_vtime-restart_base(%r1) 705 mvc __LC_EXIT_TIMER(8),restart_vtime-restart_base(%r1)
802 l %r15,__LC_SAVE_AREA+60 # load ksp 706 l %r15,__LC_GPREGS_SAVE_AREA+60 # load ksp
803 lctl %c0,%c15,__LC_CREGS_SAVE_AREA # get new ctl regs 707 lctl %c0,%c15,__LC_CREGS_SAVE_AREA # get new ctl regs
804 lam %a0,%a15,__LC_AREGS_SAVE_AREA 708 lam %a0,%a15,__LC_AREGS_SAVE_AREA
805 lm %r6,%r15,__SF_GPRS(%r15) # load registers from clone 709 lm %r6,%r15,__SF_GPRS(%r15)# load registers from clone
806 l %r1,__LC_THREAD_INFO 710 l %r1,__LC_THREAD_INFO
807 mvc __LC_USER_TIMER(8),__TI_user_timer(%r1) 711 mvc __LC_USER_TIMER(8),__TI_user_timer(%r1)
808 mvc __LC_SYSTEM_TIMER(8),__TI_system_timer(%r1) 712 mvc __LC_SYSTEM_TIMER(8),__TI_system_timer(%r1)
809 xc __LC_STEAL_TIMER(8),__LC_STEAL_TIMER 713 xc __LC_STEAL_TIMER(8),__LC_STEAL_TIMER
810 stosm __SF_EMPTY(%r15),0x04 # now we can turn dat on 714 ssm __LC_PGM_NEW_PSW # turn dat on, keep irqs off
811 basr %r14,0 715 basr %r14,0
812 l %r14,restart_addr-.(%r14) 716 l %r14,restart_addr-.(%r14)
813 basr %r14,%r14 # branch to start_secondary 717 basr %r14,%r14 # call start_secondary
814restart_addr: 718restart_addr:
815 .long start_secondary 719 .long start_secondary
816 .align 8 720 .align 8
@@ -835,19 +739,19 @@ restart_go:
835# PSW restart interrupt handler 739# PSW restart interrupt handler
836# 740#
837ENTRY(psw_restart_int_handler) 741ENTRY(psw_restart_int_handler)
838 st %r15,__LC_SAVE_AREA+48(%r0) # save r15 742 st %r15,__LC_SAVE_AREA_RESTART
839 basr %r15,0 743 basr %r15,0
8400: l %r15,.Lrestart_stack-0b(%r15) # load restart stack 7440: l %r15,.Lrestart_stack-0b(%r15) # load restart stack
841 l %r15,0(%r15) 745 l %r15,0(%r15)
842 ahi %r15,-SP_SIZE # make room for pt_regs 746 ahi %r15,-__PT_SIZE # create pt_regs on stack
843 stm %r0,%r14,SP_R0(%r15) # store gprs %r0-%r14 to stack 747 stm %r0,%r14,__PT_R0(%r15)
844 mvc SP_R15(4,%r15),__LC_SAVE_AREA+48(%r0)# store saved %r15 to stack 748 mvc __PT_R15(4,%r15),__LC_SAVE_AREA_RESTART
845 mvc SP_PSW(8,%r15),__LC_RST_OLD_PSW(%r0) # store restart old psw 749 mvc __PT_PSW(8,%r15),__LC_RST_OLD_PSW # store restart old psw
846 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # set backchain to 0 750 ahi %r15,-STACK_FRAME_OVERHEAD
751 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
847 basr %r14,0 752 basr %r14,0
8481: l %r14,.Ldo_restart-1b(%r14) 7531: l %r14,.Ldo_restart-1b(%r14)
849 basr %r14,%r14 754 basr %r14,%r14
850
851 basr %r14,0 # load disabled wait PSW if 755 basr %r14,0 # load disabled wait PSW if
8522: lpsw restart_psw_crash-2b(%r14) # do_restart returns 7562: lpsw restart_psw_crash-2b(%r14) # do_restart returns
853 .align 4 757 .align 4
@@ -869,215 +773,174 @@ restart_psw_crash:
869 */ 773 */
870stack_overflow: 774stack_overflow:
871 l %r15,__LC_PANIC_STACK # change to panic stack 775 l %r15,__LC_PANIC_STACK # change to panic stack
872 sl %r15,BASED(.Lc_spsize) 776 ahi %r15,-__PT_SIZE # create pt_regs
873 mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack 777 stm %r0,%r7,__PT_R0(%r15)
874 stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack 778 stm %r8,%r9,__PT_PSW(%r15)
875 la %r1,__LC_SAVE_AREA 779 mvc __PT_R8(32,%r11),0(%r14)
876 ch %r12,BASED(.L0x020) # old psw addr == __LC_SVC_OLD_PSW ? 780 lr %r15,%r11
877 be BASED(0f) 781 ahi %r15,-STACK_FRAME_OVERHEAD
878 ch %r12,BASED(.L0x028) # old psw addr == __LC_PGM_OLD_PSW ? 782 l %r1,BASED(1f)
879 be BASED(0f) 783 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
880 la %r1,__LC_SAVE_AREA+16 784 lr %r2,%r11 # pass pointer to pt_regs
8810: mvc SP_R12(16,%r15),0(%r1) # move %r12-%r15 to stack 785 br %r1 # branch to kernel_stack_overflow
882 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear back chain
883 l %r1,BASED(1f) # branch to kernel_stack_overflow
884 la %r2,SP_PTREGS(%r15) # load pt_regs
885 br %r1
8861: .long kernel_stack_overflow 7861: .long kernel_stack_overflow
887#endif 787#endif
888 788
889cleanup_table_system_call: 789cleanup_table:
890 .long system_call + 0x80000000, sysc_do_svc + 0x80000000 790 .long system_call + 0x80000000
891cleanup_table_sysc_tif: 791 .long sysc_do_svc + 0x80000000
892 .long sysc_tif + 0x80000000, sysc_restore + 0x80000000 792 .long sysc_tif + 0x80000000
893cleanup_table_sysc_restore: 793 .long sysc_restore + 0x80000000
894 .long sysc_restore + 0x80000000, sysc_done + 0x80000000 794 .long sysc_done + 0x80000000
895cleanup_table_io_tif: 795 .long io_tif + 0x80000000
896 .long io_tif + 0x80000000, io_restore + 0x80000000 796 .long io_restore + 0x80000000
897cleanup_table_io_restore: 797 .long io_done + 0x80000000
898 .long io_restore + 0x80000000, io_done + 0x80000000
899 798
900cleanup_critical: 799cleanup_critical:
901 clc 4(4,%r12),BASED(cleanup_table_system_call) 800 cl %r9,BASED(cleanup_table) # system_call
902 bl BASED(0f) 801 jl 0f
903 clc 4(4,%r12),BASED(cleanup_table_system_call+4) 802 cl %r9,BASED(cleanup_table+4) # sysc_do_svc
904 bl BASED(cleanup_system_call) 803 jl cleanup_system_call
9050: 804 cl %r9,BASED(cleanup_table+8) # sysc_tif
906 clc 4(4,%r12),BASED(cleanup_table_sysc_tif) 805 jl 0f
907 bl BASED(0f) 806 cl %r9,BASED(cleanup_table+12) # sysc_restore
908 clc 4(4,%r12),BASED(cleanup_table_sysc_tif+4) 807 jl cleanup_sysc_tif
909 bl BASED(cleanup_sysc_tif) 808 cl %r9,BASED(cleanup_table+16) # sysc_done
9100: 809 jl cleanup_sysc_restore
911 clc 4(4,%r12),BASED(cleanup_table_sysc_restore) 810 cl %r9,BASED(cleanup_table+20) # io_tif
912 bl BASED(0f) 811 jl 0f
913 clc 4(4,%r12),BASED(cleanup_table_sysc_restore+4) 812 cl %r9,BASED(cleanup_table+24) # io_restore
914 bl BASED(cleanup_sysc_restore) 813 jl cleanup_io_tif
9150: 814 cl %r9,BASED(cleanup_table+28) # io_done
916 clc 4(4,%r12),BASED(cleanup_table_io_tif) 815 jl cleanup_io_restore
917 bl BASED(0f) 8160: br %r14
918 clc 4(4,%r12),BASED(cleanup_table_io_tif+4)
919 bl BASED(cleanup_io_tif)
9200:
921 clc 4(4,%r12),BASED(cleanup_table_io_restore)
922 bl BASED(0f)
923 clc 4(4,%r12),BASED(cleanup_table_io_restore+4)
924 bl BASED(cleanup_io_restore)
9250:
926 br %r14
927 817
928cleanup_system_call: 818cleanup_system_call:
929 mvc __LC_RETURN_PSW(8),0(%r12) 819 # check if stpt has been executed
930 clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+4) 820 cl %r9,BASED(cleanup_system_call_insn)
931 bh BASED(0f) 821 jh 0f
932 mvc __LC_SYNC_ENTER_TIMER(8),__LC_MCCK_ENTER_TIMER
933 c %r12,BASED(.Lmck_old_psw)
934 be BASED(0f)
935 mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER 822 mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER
9360: c %r12,BASED(.Lmck_old_psw) 823 chi %r11,__LC_SAVE_AREA_ASYNC
937 la %r12,__LC_SAVE_AREA+32 824 je 0f
938 be BASED(0f) 825 mvc __LC_SYNC_ENTER_TIMER(8),__LC_MCCK_ENTER_TIMER
939 la %r12,__LC_SAVE_AREA+16 8260: # check if stm has been executed
9400: clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+8) 827 cl %r9,BASED(cleanup_system_call_insn+4)
941 bhe BASED(cleanup_vtime) 828 jh 0f
942 clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn) 829 mvc __LC_SAVE_AREA_SYNC(32),0(%r11)
943 bh BASED(0f) 8300: # set up saved registers r12, and r13
944 mvc __LC_SAVE_AREA(16),0(%r12) 831 st %r12,16(%r11) # r12 thread-info pointer
9450: st %r13,4(%r12) 832 st %r13,20(%r11) # r13 literal-pool pointer
946 l %r15,__LC_KERNEL_STACK # problem state -> load ksp 833 # check if the user time calculation has been done
947 s %r15,BASED(.Lc_spsize) # make room for registers & psw 834 cl %r9,BASED(cleanup_system_call_insn+8)
948 st %r15,12(%r12) 835 jh 0f
949 CREATE_STACK_FRAME __LC_SAVE_AREA 836 l %r10,__LC_EXIT_TIMER
950 mvc 0(4,%r12),__LC_THREAD_INFO 837 l %r15,__LC_EXIT_TIMER+4
951 l %r12,__LC_THREAD_INFO 838 SUB64 %r10,%r15,__LC_SYNC_ENTER_TIMER
952 mvc SP_PSW(8,%r15),__LC_SVC_OLD_PSW 839 ADD64 %r10,%r15,__LC_USER_TIMER
953 mvc SP_SVC_CODE(4,%r15),__LC_SVC_ILC 840 st %r10,__LC_USER_TIMER
954 oi __TI_flags+3(%r12),_TIF_SYSCALL 841 st %r15,__LC_USER_TIMER+4
955cleanup_vtime: 8420: # check if the system time calculation has been done
956 clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+12) 843 cl %r9,BASED(cleanup_system_call_insn+12)
957 bhe BASED(cleanup_stime) 844 jh 0f
958 UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER 845 l %r10,__LC_LAST_UPDATE_TIMER
959cleanup_stime: 846 l %r15,__LC_LAST_UPDATE_TIMER+4
960 clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+16) 847 SUB64 %r10,%r15,__LC_EXIT_TIMER
961 bh BASED(cleanup_update) 848 ADD64 %r10,%r15,__LC_SYSTEM_TIMER
962 UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER 849 st %r10,__LC_SYSTEM_TIMER
963cleanup_update: 850 st %r15,__LC_SYSTEM_TIMER+4
8510: # update accounting time stamp
964 mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER 852 mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
965 mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_system_call+4) 853 # set up saved register 11
966 la %r12,__LC_RETURN_PSW 854 l %r15,__LC_KERNEL_STACK
855 ahi %r15,-__PT_SIZE
856 st %r15,12(%r11) # r11 pt_regs pointer
857 # fill pt_regs
858 mvc __PT_R8(32,%r15),__LC_SAVE_AREA_SYNC
859 stm %r0,%r7,__PT_R0(%r15)
860 mvc __PT_PSW(8,%r15),__LC_SVC_OLD_PSW
861 mvc __PT_INT_CODE(4,%r15),__LC_SVC_ILC
862 # setup saved register 15
863 ahi %r15,-STACK_FRAME_OVERHEAD
864 st %r15,28(%r11) # r15 stack pointer
865 # set new psw address and exit
866 l %r9,BASED(cleanup_table+4) # sysc_do_svc + 0x80000000
967 br %r14 867 br %r14
968cleanup_system_call_insn: 868cleanup_system_call_insn:
969 .long sysc_saveall + 0x80000000
970 .long system_call + 0x80000000 869 .long system_call + 0x80000000
971 .long sysc_vtime + 0x80000000 870 .long sysc_stm + 0x80000000
972 .long sysc_stime + 0x80000000 871 .long sysc_vtime + 0x80000000 + 36
973 .long sysc_update + 0x80000000 872 .long sysc_vtime + 0x80000000 + 76
974 873
975cleanup_sysc_tif: 874cleanup_sysc_tif:
976 mvc __LC_RETURN_PSW(4),0(%r12) 875 l %r9,BASED(cleanup_table+8) # sysc_tif + 0x80000000
977 mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_sysc_tif)
978 la %r12,__LC_RETURN_PSW
979 br %r14 876 br %r14
980 877
981cleanup_sysc_restore: 878cleanup_sysc_restore:
982 clc 4(4,%r12),BASED(cleanup_sysc_restore_insn) 879 cl %r9,BASED(cleanup_sysc_restore_insn)
983 be BASED(2f) 880 jhe 0f
984 mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER 881 l %r9,12(%r11) # get saved pointer to pt_regs
985 c %r12,BASED(.Lmck_old_psw) 882 mvc __LC_RETURN_PSW(8),__PT_PSW(%r9)
986 be BASED(0f) 883 mvc 0(32,%r11),__PT_R8(%r9)
987 mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER 884 lm %r0,%r7,__PT_R0(%r9)
9880: clc 4(4,%r12),BASED(cleanup_sysc_restore_insn+4) 8850: lm %r8,%r9,__LC_RETURN_PSW
989 be BASED(2f)
990 mvc __LC_RETURN_PSW(8),SP_PSW(%r15)
991 c %r12,BASED(.Lmck_old_psw)
992 la %r12,__LC_SAVE_AREA+32
993 be BASED(1f)
994 la %r12,__LC_SAVE_AREA+16
9951: mvc 0(16,%r12),SP_R12(%r15)
996 lm %r0,%r11,SP_R0(%r15)
997 l %r15,SP_R15(%r15)
9982: la %r12,__LC_RETURN_PSW
999 br %r14 886 br %r14
1000cleanup_sysc_restore_insn: 887cleanup_sysc_restore_insn:
1001 .long sysc_done - 4 + 0x80000000 888 .long sysc_done - 4 + 0x80000000
1002 .long sysc_done - 8 + 0x80000000
1003 889
1004cleanup_io_tif: 890cleanup_io_tif:
1005 mvc __LC_RETURN_PSW(4),0(%r12) 891 l %r9,BASED(cleanup_table+20) # io_tif + 0x80000000
1006 mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_io_tif)
1007 la %r12,__LC_RETURN_PSW
1008 br %r14 892 br %r14
1009 893
1010cleanup_io_restore: 894cleanup_io_restore:
1011 clc 4(4,%r12),BASED(cleanup_io_restore_insn) 895 cl %r9,BASED(cleanup_io_restore_insn)
1012 be BASED(1f) 896 jhe 0f
1013 mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER 897 l %r9,12(%r11) # get saved r11 pointer to pt_regs
1014 clc 4(4,%r12),BASED(cleanup_io_restore_insn+4) 898 mvc __LC_RETURN_PSW(8),__PT_PSW(%r9)
1015 be BASED(1f) 899 ni __LC_RETURN_PSW+1,0xfd # clear wait state bit
1016 mvc __LC_RETURN_PSW(8),SP_PSW(%r15) 900 mvc 0(32,%r11),__PT_R8(%r9)
1017 mvc __LC_SAVE_AREA+32(16),SP_R12(%r15) 901 lm %r0,%r7,__PT_R0(%r9)
1018 lm %r0,%r11,SP_R0(%r15) 9020: lm %r8,%r9,__LC_RETURN_PSW
1019 l %r15,SP_R15(%r15)
10201: la %r12,__LC_RETURN_PSW
1021 br %r14 903 br %r14
1022cleanup_io_restore_insn: 904cleanup_io_restore_insn:
1023 .long io_done - 4 + 0x80000000 905 .long io_done - 4 + 0x80000000
1024 .long io_done - 8 + 0x80000000
1025 906
1026/* 907/*
1027 * Integer constants 908 * Integer constants
1028 */ 909 */
1029 .align 4 910 .align 4
1030.Lc_spsize: .long SP_SIZE 911.Lnr_syscalls: .long NR_syscalls
1031.Lc_overhead: .long STACK_FRAME_OVERHEAD
1032.Lnr_syscalls: .long NR_syscalls
1033.L0x018: .short 0x018
1034.L0x020: .short 0x020
1035.L0x028: .short 0x028
1036.L0x030: .short 0x030
1037.L0x038: .short 0x038
1038.Lc_1: .long 1
1039 912
1040/* 913/*
1041 * Symbol constants 914 * Symbol constants
1042 */ 915 */
1043.Ls390_mcck: .long s390_do_machine_check 916.Ldo_machine_check: .long s390_do_machine_check
1044.Ls390_handle_mcck: 917.Lhandle_mcck: .long s390_handle_mcck
1045 .long s390_handle_mcck 918.Ldo_IRQ: .long do_IRQ
1046.Lmck_old_psw: .long __LC_MCK_OLD_PSW 919.Ldo_extint: .long do_extint
1047.Ldo_IRQ: .long do_IRQ 920.Ldo_signal: .long do_signal
1048.Ldo_extint: .long do_extint 921.Ldo_notify_resume: .long do_notify_resume
1049.Ldo_signal: .long do_signal 922.Ldo_per_trap: .long do_per_trap
1050.Ldo_notify_resume: 923.Ldo_execve: .long do_execve
1051 .long do_notify_resume 924.Lexecve_tail: .long execve_tail
1052.Lhandle_per: .long do_per_trap 925.Ljump_table: .long pgm_check_table
1053.Ldo_execve: .long do_execve 926.Lschedule: .long schedule
1054.Lexecve_tail: .long execve_tail
1055.Ljump_table: .long pgm_check_table
1056.Lschedule: .long schedule
1057#ifdef CONFIG_PREEMPT 927#ifdef CONFIG_PREEMPT
1058.Lpreempt_schedule_irq: 928.Lpreempt_irq: .long preempt_schedule_irq
1059 .long preempt_schedule_irq
1060#endif 929#endif
1061.Ltrace_entry: .long do_syscall_trace_enter 930.Ltrace_enter: .long do_syscall_trace_enter
1062.Ltrace_exit: .long do_syscall_trace_exit 931.Ltrace_exit: .long do_syscall_trace_exit
1063.Lschedtail: .long schedule_tail 932.Lschedule_tail: .long schedule_tail
1064.Lsysc_table: .long sys_call_table 933.Lsys_call_table: .long sys_call_table
934.Lsysc_per: .long sysc_per + 0x80000000
1065#ifdef CONFIG_TRACE_IRQFLAGS 935#ifdef CONFIG_TRACE_IRQFLAGS
1066.Ltrace_irq_on_caller: 936.Lhardirqs_on: .long trace_hardirqs_on_caller
1067 .long trace_hardirqs_on_caller 937.Lhardirqs_off: .long trace_hardirqs_off_caller
1068.Ltrace_irq_off_caller:
1069 .long trace_hardirqs_off_caller
1070#endif 938#endif
1071#ifdef CONFIG_LOCKDEP 939#ifdef CONFIG_LOCKDEP
1072.Llockdep_sys_exit: 940.Llockdep_sys_exit: .long lockdep_sys_exit
1073 .long lockdep_sys_exit
1074#endif 941#endif
1075.Lcritical_start: 942.Lcritical_start: .long __critical_start + 0x80000000
1076 .long __critical_start + 0x80000000 943.Lcritical_length: .long __critical_end - __critical_start
1077.Lcritical_end:
1078 .long __critical_end + 0x80000000
1079.Lcleanup_critical:
1080 .long cleanup_critical
1081 944
1082 .section .rodata, "a" 945 .section .rodata, "a"
1083#define SYSCALL(esa,esame,emu) .long esa 946#define SYSCALL(esa,esame,emu) .long esa
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-09 06:36:34 -0500