| blob | 829a6d80711c13827ecd5fe74d19f0ce4732a1dc |
1 #include <asm/asmmacro.h>
2 #include <asm/ia32.h>
3 #include <asm/offsets.h>
4 #include <asm/signal.h>
5 #include <asm/thread_info.h>
7 #include "../kernel/minstate.h"
9 /*
10 * execve() is special because in case of success, we need to
11 * setup a null register window frame (in case an IA-32 process
12 * is exec'ing an IA-64 program).
13 */
14 ENTRY(ia32_execve)
15 .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(3)
16 alloc loc1=ar.pfs,3,2,4,0
17 mov loc0=rp
18 .body
19 zxt4 out0=in0 // filename
20 ;; // stop bit between alloc and call
21 zxt4 out1=in1 // argv
22 zxt4 out2=in2 // envp
23 add out3=16,sp // regs
24 br.call.sptk.few rp=sys32_execve
25 1: cmp.ge p6,p0=r8,r0
26 mov ar.pfs=loc1 // restore ar.pfs
27 ;;
28 (p6) mov ar.pfs=r0 // clear ar.pfs in case of success
29 sxt4 r8=r8 // return 64-bit result
30 mov rp=loc0
31 br.ret.sptk.few rp
32 END(ia32_execve)
34 ENTRY(ia32_clone)
35 .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(5)
36 alloc r16=ar.pfs,5,2,6,0
37 DO_SAVE_SWITCH_STACK
38 mov loc0=rp
39 mov loc1=r16 // save ar.pfs across do_fork
40 .body
41 zxt4 out1=in1 // newsp
42 mov out3=16 // stacksize (compensates for 16-byte scratch area)
43 adds out2=IA64_SWITCH_STACK_SIZE+16,sp // out2 = ®s
44 mov out0=in0 // out0 = clone_flags
45 zxt4 out4=in2 // out4 = parent_tidptr
46 zxt4 out5=in4 // out5 = child_tidptr
47 br.call.sptk.many rp=do_fork
48 .ret0: .restore sp
49 adds sp=IA64_SWITCH_STACK_SIZE,sp // pop the switch stack
50 mov ar.pfs=loc1
51 mov rp=loc0
52 br.ret.sptk.many rp
53 END(ia32_clone)
55 ENTRY(sys32_rt_sigsuspend)
56 .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
57 alloc loc1=ar.pfs,8,2,3,0 // preserve all eight input regs
58 mov loc0=rp
59 mov out0=in0 // mask
60 mov out1=in1 // sigsetsize
61 mov out2=sp // out2 = &sigscratch
62 .fframe 16
63 adds sp=-16,sp // allocate dummy "sigscratch"
64 ;;
65 .body
66 br.call.sptk.many rp=ia32_rt_sigsuspend
67 1: .restore sp
68 adds sp=16,sp
69 mov rp=loc0
70 mov ar.pfs=loc1
71 br.ret.sptk.many rp
72 END(sys32_rt_sigsuspend)
74 ENTRY(sys32_sigsuspend)
75 .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
76 alloc loc1=ar.pfs,8,2,3,0 // preserve all eight input regs
77 mov loc0=rp
78 mov out0=in2 // mask (first two args are ignored)
79 ;;
80 mov out1=sp // out1 = &sigscratch
81 .fframe 16
82 adds sp=-16,sp // allocate dummy "sigscratch"
83 .body
84 br.call.sptk.many rp=ia32_sigsuspend
85 1: .restore sp
86 adds sp=16,sp
87 mov rp=loc0
88 mov ar.pfs=loc1
89 br.ret.sptk.many rp
90 END(sys32_sigsuspend)
92 GLOBAL_ENTRY(ia32_ret_from_clone)
93 PT_REGS_UNWIND_INFO(0)
94 { /*
95 * Some versions of gas generate bad unwind info if the first instruction of a
96 * procedure doesn't go into the first slot of a bundle. This is a workaround.
97 */
98 nop.m 0
99 nop.i 0
100 /*
101 * We need to call schedule_tail() to complete the scheduling process.
102 * Called by ia64_switch_to after do_fork()->copy_thread(). r8 contains the
103 * address of the previously executing task.
104 */
105 br.call.sptk.many rp=ia64_invoke_schedule_tail
106 }
107 .ret1:
108 adds r2=TI_FLAGS+IA64_TASK_SIZE,r13
109 ;;
110 ld4 r2=[r2]
111 ;;
112 mov r8=0
113 and r2=_TIF_SYSCALL_TRACEAUDIT,r2
114 ;;
115 cmp.ne p6,p0=r2,r0
116 (p6) br.cond.spnt .ia32_strace_check_retval
117 ;; // prevent RAW on r8
118 END(ia32_ret_from_clone)
119 // fall thrugh
120 GLOBAL_ENTRY(ia32_ret_from_syscall)
121 PT_REGS_UNWIND_INFO(0)
123 cmp.ge p6,p7=r8,r0 // syscall executed successfully?
124 adds r2=IA64_PT_REGS_R8_OFFSET+16,sp // r2 = &pt_regs.r8
125 ;;
126 alloc r3=ar.pfs,0,0,0,0 // drop the syscall argument frame
127 st8 [r2]=r8 // store return value in slot for r8
128 br.cond.sptk.many ia64_leave_kernel
129 END(ia32_ret_from_syscall)
131 //
132 // Invoke a system call, but do some tracing before and after the call.
133 // We MUST preserve the current register frame throughout this routine
134 // because some system calls (such as ia64_execve) directly
135 // manipulate ar.pfs.
136 //
137 // Input:
138 // r8 = syscall number
139 // b6 = syscall entry point
140 //
141 GLOBAL_ENTRY(ia32_trace_syscall)
142 PT_REGS_UNWIND_INFO(0)
143 mov r3=-38
144 adds r2=IA64_PT_REGS_R8_OFFSET+16,sp
145 ;;
146 st8 [r2]=r3 // initialize return code to -ENOSYS
147 br.call.sptk.few rp=syscall_trace_enter // give parent a chance to catch syscall args
148 .ret2: // Need to reload arguments (they may be changed by the tracing process)
149 adds r2=IA64_PT_REGS_R1_OFFSET+16,sp // r2 = &pt_regs.r1
150 adds r3=IA64_PT_REGS_R13_OFFSET+16,sp // r3 = &pt_regs.r13
151 mov r15=IA32_NR_syscalls
152 ;;
153 ld4 r8=[r2],IA64_PT_REGS_R9_OFFSET-IA64_PT_REGS_R1_OFFSET
154 movl r16=ia32_syscall_table
155 ;;
156 ld4 r33=[r2],8 // r9 == ecx
157 ld4 r37=[r3],16 // r13 == ebp
158 cmp.ltu.unc p6,p7=r8,r15
159 ;;
160 ld4 r34=[r2],8 // r10 == edx
161 ld4 r36=[r3],8 // r15 == edi
162 (p6) shladd r16=r8,3,r16 // force ni_syscall if not valid syscall number
163 ;;
164 ld8 r16=[r16]
165 ;;
166 ld4 r32=[r2],8 // r11 == ebx
167 mov b6=r16
168 ld4 r35=[r3],8 // r14 == esi
169 br.call.sptk.few rp=b6 // do the syscall
170 .ia32_strace_check_retval:
171 cmp.lt p6,p0=r8,r0 // syscall failed?
172 adds r2=IA64_PT_REGS_R8_OFFSET+16,sp // r2 = &pt_regs.r8
173 ;;
174 st8.spill [r2]=r8 // store return value in slot for r8
175 br.call.sptk.few rp=syscall_trace_leave // give parent a chance to catch return value
176 .ret4: alloc r2=ar.pfs,0,0,0,0 // drop the syscall argument frame
177 br.cond.sptk.many ia64_leave_kernel
178 END(ia32_trace_syscall)
180 GLOBAL_ENTRY(sys32_vfork)
181 alloc r16=ar.pfs,2,2,4,0;;
182 mov out0=IA64_CLONE_VFORK|IA64_CLONE_VM|SIGCHLD // out0 = clone_flags
183 br.cond.sptk.few .fork1 // do the work
184 END(sys32_vfork)
186 GLOBAL_ENTRY(sys32_fork)
187 .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(2)
188 alloc r16=ar.pfs,2,2,4,0
189 mov out0=SIGCHLD // out0 = clone_flags
190 ;;
191 .fork1:
192 mov loc0=rp
193 mov loc1=r16 // save ar.pfs across do_fork
194 DO_SAVE_SWITCH_STACK
196 .body
198 mov out1=0
199 mov out3=0
200 adds out2=IA64_SWITCH_STACK_SIZE+16,sp // out2 = ®s
201 br.call.sptk.few rp=do_fork
202 .ret5: .restore sp
203 adds sp=IA64_SWITCH_STACK_SIZE,sp // pop the switch stack
204 mov ar.pfs=loc1
205 mov rp=loc0
206 br.ret.sptk.many rp
207 END(sys32_fork)
209 .rodata
210 .align 8
211 .globl ia32_syscall_table
212 ia32_syscall_table:
213 data8 sys_ni_syscall /* 0 - old "setup(" system call*/
214 data8 sys_exit
215 data8 sys32_fork
216 data8 sys_read
217 data8 sys_write
218 data8 sys32_open /* 5 */
219 data8 sys_close
220 data8 sys32_waitpid
221 data8 sys_creat
222 data8 sys_link
223 data8 sys_unlink /* 10 */
224 data8 ia32_execve
225 data8 sys_chdir
226 data8 compat_sys_time
227 data8 sys_mknod
228 data8 sys_chmod /* 15 */
229 data8 sys_lchown /* 16-bit version */
230 data8 sys_ni_syscall /* old break syscall holder */
231 data8 sys_ni_syscall
232 data8 sys32_lseek
233 data8 sys_getpid /* 20 */
234 data8 compat_sys_mount
235 data8 sys_oldumount
236 data8 sys_setuid /* 16-bit version */
237 data8 sys_getuid /* 16-bit version */
238 data8 compat_sys_stime /* 25 */
239 data8 sys32_ptrace
240 data8 sys32_alarm
241 data8 sys_ni_syscall
242 data8 sys32_pause
243 data8 compat_sys_utime /* 30 */
244 data8 sys_ni_syscall /* old stty syscall holder */
245 data8 sys_ni_syscall /* old gtty syscall holder */
246 data8 sys_access
247 data8 sys_nice
248 data8 sys_ni_syscall /* 35 */ /* old ftime syscall holder */
249 data8 sys_sync
250 data8 sys_kill
251 data8 sys_rename
252 data8 sys_mkdir
253 data8 sys_rmdir /* 40 */
254 data8 sys_dup
255 data8 sys32_pipe
256 data8 compat_sys_times
257 data8 sys_ni_syscall /* old prof syscall holder */
258 data8 sys32_brk /* 45 */
259 data8 sys_setgid /* 16-bit version */
260 data8 sys_getgid /* 16-bit version */
261 data8 sys32_signal
262 data8 sys_geteuid /* 16-bit version */
263 data8 sys_getegid /* 16-bit version */ /* 50 */
264 data8 sys_acct
265 data8 sys_umount /* recycled never used phys( */
266 data8 sys_ni_syscall /* old lock syscall holder */
267 data8 compat_sys_ioctl
268 data8 compat_sys_fcntl /* 55 */
269 data8 sys_ni_syscall /* old mpx syscall holder */
270 data8 sys_setpgid
271 data8 sys_ni_syscall /* old ulimit syscall holder */
272 data8 sys_ni_syscall
273 data8 sys_umask /* 60 */
274 data8 sys_chroot
275 data8 sys_ustat
276 data8 sys_dup2
277 data8 sys_getppid
278 data8 sys_getpgrp /* 65 */
279 data8 sys_setsid
280 data8 sys32_sigaction
281 data8 sys_ni_syscall
282 data8 sys_ni_syscall
283 data8 sys_setreuid /* 16-bit version */ /* 70 */
284 data8 sys_setregid /* 16-bit version */
285 data8 sys32_sigsuspend
286 data8 compat_sys_sigpending
287 data8 sys_sethostname
288 data8 compat_sys_setrlimit /* 75 */
289 data8 compat_sys_old_getrlimit
290 data8 compat_sys_getrusage
291 data8 sys32_gettimeofday
292 data8 sys32_settimeofday
293 data8 sys32_getgroups16 /* 80 */
294 data8 sys32_setgroups16
295 data8 sys32_old_select
296 data8 sys_symlink
297 data8 sys_ni_syscall
298 data8 sys_readlink /* 85 */
299 data8 sys_uselib
300 data8 sys_swapon
301 data8 sys_reboot
302 data8 sys32_readdir
303 data8 sys32_mmap /* 90 */
304 data8 sys32_munmap
305 data8 sys_truncate
306 data8 sys_ftruncate
307 data8 sys_fchmod
308 data8 sys_fchown /* 16-bit version */ /* 95 */
309 data8 sys_getpriority
310 data8 sys_setpriority
311 data8 sys_ni_syscall /* old profil syscall holder */
312 data8 compat_sys_statfs
313 data8 compat_sys_fstatfs /* 100 */
314 data8 sys_ni_syscall /* ioperm */
315 data8 compat_sys_socketcall
316 data8 sys_syslog
317 data8 compat_sys_setitimer
318 data8 compat_sys_getitimer /* 105 */
319 data8 compat_sys_newstat
320 data8 compat_sys_newlstat
321 data8 compat_sys_newfstat
322 data8 sys_ni_syscall
323 data8 sys_ni_syscall /* iopl */ /* 110 */
324 data8 sys_vhangup
325 data8 sys_ni_syscall /* used to be sys_idle */
326 data8 sys_ni_syscall
327 data8 compat_sys_wait4
328 data8 sys_swapoff /* 115 */
329 data8 sys32_sysinfo
330 data8 sys32_ipc
331 data8 sys_fsync
332 data8 sys32_sigreturn
333 data8 ia32_clone /* 120 */
334 data8 sys_setdomainname
335 data8 sys32_newuname
336 data8 sys32_modify_ldt
337 data8 sys_ni_syscall /* adjtimex */
338 data8 sys32_mprotect /* 125 */
339 data8 compat_sys_sigprocmask
340 data8 sys_ni_syscall /* create_module */
341 data8 sys_ni_syscall /* init_module */
342 data8 sys_ni_syscall /* delete_module */
343 data8 sys_ni_syscall /* get_kernel_syms */ /* 130 */
344 data8 sys_quotactl
345 data8 sys_getpgid
346 data8 sys_fchdir
347 data8 sys_ni_syscall /* sys_bdflush */
348 data8 sys_sysfs /* 135 */
349 data8 sys32_personality
350 data8 sys_ni_syscall /* for afs_syscall */
351 data8 sys_setfsuid /* 16-bit version */
352 data8 sys_setfsgid /* 16-bit version */
353 data8 sys_llseek /* 140 */
354 data8 compat_sys_getdents
355 data8 compat_sys_select
356 data8 sys_flock
357 data8 sys32_msync
358 data8 compat_sys_readv /* 145 */
359 data8 compat_sys_writev
360 data8 sys_getsid
361 data8 sys_fdatasync
362 data8 sys32_sysctl
363 data8 sys_mlock /* 150 */
364 data8 sys_munlock
365 data8 sys_mlockall
366 data8 sys_munlockall
367 data8 sys_sched_setparam
368 data8 sys_sched_getparam /* 155 */
369 data8 sys_sched_setscheduler
370 data8 sys_sched_getscheduler
371 data8 sys_sched_yield
372 data8 sys_sched_get_priority_max
373 data8 sys_sched_get_priority_min /* 160 */
374 data8 sys32_sched_rr_get_interval
375 data8 compat_sys_nanosleep
376 data8 sys32_mremap
377 data8 sys_setresuid /* 16-bit version */
378 data8 sys32_getresuid16 /* 16-bit version */ /* 165 */
379 data8 sys_ni_syscall /* vm86 */
380 data8 sys_ni_syscall /* sys_query_module */
381 data8 sys_poll
382 data8 sys_ni_syscall /* nfsservctl */
383 data8 sys_setresgid /* 170 */
384 data8 sys32_getresgid16
385 data8 sys_prctl
386 data8 sys32_rt_sigreturn
387 data8 sys32_rt_sigaction
388 data8 sys32_rt_sigprocmask /* 175 */
389 data8 sys_rt_sigpending
390 data8 compat_sys_rt_sigtimedwait
391 data8 sys32_rt_sigqueueinfo
392 data8 sys32_rt_sigsuspend
393 data8 sys32_pread /* 180 */
394 data8 sys32_pwrite
395 data8 sys_chown /* 16-bit version */
396 data8 sys_getcwd
397 data8 sys_capget
398 data8 sys_capset /* 185 */
399 data8 sys32_sigaltstack
400 data8 sys32_sendfile
401 data8 sys_ni_syscall /* streams1 */
402 data8 sys_ni_syscall /* streams2 */
403 data8 sys32_vfork /* 190 */
404 data8 compat_sys_getrlimit
405 data8 sys32_mmap2
406 data8 sys32_truncate64
407 data8 sys32_ftruncate64
408 data8 sys32_stat64 /* 195 */
409 data8 sys32_lstat64
410 data8 sys32_fstat64
411 data8 sys_lchown
412 data8 sys_getuid
413 data8 sys_getgid /* 200 */
414 data8 sys_geteuid
415 data8 sys_getegid
416 data8 sys_setreuid
417 data8 sys_setregid
418 data8 sys_getgroups /* 205 */
419 data8 sys_setgroups
420 data8 sys_fchown
421 data8 sys_setresuid
422 data8 sys_getresuid
423 data8 sys_setresgid /* 210 */
424 data8 sys_getresgid
425 data8 sys_chown
426 data8 sys_setuid
427 data8 sys_setgid
428 data8 sys_setfsuid /* 215 */
429 data8 sys_setfsgid
430 data8 sys_pivot_root
431 data8 sys_mincore
432 data8 sys_madvise
433 data8 compat_sys_getdents64 /* 220 */
434 data8 compat_sys_fcntl64
435 data8 sys_ni_syscall /* reserved for TUX */
436 data8 sys_ni_syscall /* reserved for Security */
437 data8 sys_gettid
438 data8 sys_readahead /* 225 */
439 data8 sys_setxattr
440 data8 sys_lsetxattr
441 data8 sys_fsetxattr
442 data8 sys_getxattr
443 data8 sys_lgetxattr /* 230 */
444 data8 sys_fgetxattr
445 data8 sys_listxattr
446 data8 sys_llistxattr
447 data8 sys_flistxattr
448 data8 sys_removexattr /* 235 */
449 data8 sys_lremovexattr
450 data8 sys_fremovexattr
451 data8 sys_tkill
452 data8 sys_sendfile64
453 data8 compat_sys_futex /* 240 */
454 data8 compat_sys_sched_setaffinity
455 data8 compat_sys_sched_getaffinity
456 data8 sys32_set_thread_area
457 data8 sys32_get_thread_area
458 data8 compat_sys_io_setup /* 245 */
459 data8 sys_io_destroy
460 data8 compat_sys_io_getevents
461 data8 compat_sys_io_submit
462 data8 sys_io_cancel
463 data8 sys_fadvise64 /* 250 */
464 data8 sys_ni_syscall
465 data8 sys_exit_group
466 data8 sys_lookup_dcookie
467 data8 sys_epoll_create
468 data8 sys32_epoll_ctl /* 255 */
469 data8 sys32_epoll_wait
470 data8 sys_remap_file_pages
471 data8 sys_set_tid_address
472 data8 sys32_timer_create
473 data8 compat_sys_timer_settime /* 260 */
474 data8 compat_sys_timer_gettime
475 data8 sys_timer_getoverrun
476 data8 sys_timer_delete
477 data8 compat_sys_clock_settime
478 data8 compat_sys_clock_gettime /* 265 */
479 data8 compat_sys_clock_getres
480 data8 compat_sys_clock_nanosleep
481 data8 compat_sys_statfs64
482 data8 compat_sys_fstatfs64
483 data8 sys_tgkill /* 270 */
484 data8 compat_sys_utimes
485 data8 sys32_fadvise64_64
486 data8 sys_ni_syscall
487 data8 sys_ni_syscall
488 data8 sys_ni_syscall /* 275 */
489 data8 sys_ni_syscall
490 data8 compat_sys_mq_open
491 data8 sys_mq_unlink
492 data8 compat_sys_mq_timedsend
493 data8 compat_sys_mq_timedreceive /* 280 */
494 data8 compat_sys_mq_notify
495 data8 compat_sys_mq_getsetattr
496 data8 sys_ni_syscall /* reserved for kexec */
497 data8 compat_sys_waitid
499 // guard against failures to increase IA32_NR_syscalls
500 .org ia32_syscall_table + 8*IA32_NR_syscalls