[IA64] forbid ptrace changes psr.ri to 3
[linux-3.10.git] / arch / ia64 / ia32 / ia32_entry.S
1 #include <asm/asmmacro.h>
2 #include <asm/ia32.h>
3 #include <asm/asm-offsets.h>
4 #include <asm/signal.h>
5 #include <asm/thread_info.h>
6
7 #include "../kernel/minstate.h"
8
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)
33
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 = &regs
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)
54
55 GLOBAL_ENTRY(ia32_ret_from_clone)
56         PT_REGS_UNWIND_INFO(0)
57 {       /*
58          * Some versions of gas generate bad unwind info if the first instruction of a
59          * procedure doesn't go into the first slot of a bundle.  This is a workaround.
60          */
61         nop.m 0
62         nop.i 0
63         /*
64          * We need to call schedule_tail() to complete the scheduling process.
65          * Called by ia64_switch_to after do_fork()->copy_thread().  r8 contains the
66          * address of the previously executing task.
67          */
68         br.call.sptk.many rp=ia64_invoke_schedule_tail
69 }
70 .ret1:
71         adds r2=TI_FLAGS+IA64_TASK_SIZE,r13
72         ;;
73         ld4 r2=[r2]
74         ;;
75         mov r8=0
76         and r2=_TIF_SYSCALL_TRACEAUDIT,r2
77         ;;
78         cmp.ne p6,p0=r2,r0
79 (p6)    br.cond.spnt .ia32_strace_check_retval
80         ;;                                      // prevent RAW on r8
81 END(ia32_ret_from_clone)
82         // fall thrugh
83 GLOBAL_ENTRY(ia32_ret_from_syscall)
84         PT_REGS_UNWIND_INFO(0)
85
86         cmp.ge p6,p7=r8,r0                      // syscall executed successfully?
87         adds r2=IA64_PT_REGS_R8_OFFSET+16,sp    // r2 = &pt_regs.r8
88         ;;
89         alloc r3=ar.pfs,0,0,0,0                 // drop the syscall argument frame
90         st8 [r2]=r8                             // store return value in slot for r8
91         br.cond.sptk.many ia64_leave_kernel
92 END(ia32_ret_from_syscall)
93
94         //
95         // Invoke a system call, but do some tracing before and after the call.
96         // We MUST preserve the current register frame throughout this routine
97         // because some system calls (such as ia64_execve) directly
98         // manipulate ar.pfs.
99         //
100         // Input:
101         //      r8 = syscall number
102         //      b6 = syscall entry point
103         //
104 GLOBAL_ENTRY(ia32_trace_syscall)
105         PT_REGS_UNWIND_INFO(0)
106         mov r3=-38
107         adds r2=IA64_PT_REGS_R8_OFFSET+16,sp
108         ;;
109         st8 [r2]=r3                             // initialize return code to -ENOSYS
110         br.call.sptk.few rp=syscall_trace_enter // give parent a chance to catch syscall args
111 .ret2:  // Need to reload arguments (they may be changed by the tracing process)
112         adds r2=IA64_PT_REGS_R1_OFFSET+16,sp    // r2 = &pt_regs.r1
113         adds r3=IA64_PT_REGS_R13_OFFSET+16,sp   // r3 = &pt_regs.r13
114         mov r15=IA32_NR_syscalls
115         ;;
116         ld4 r8=[r2],IA64_PT_REGS_R9_OFFSET-IA64_PT_REGS_R1_OFFSET
117         movl r16=ia32_syscall_table
118         ;;
119         ld4 r33=[r2],8                          // r9 == ecx
120         ld4 r37=[r3],16                         // r13 == ebp
121         cmp.ltu.unc p6,p7=r8,r15
122         ;;
123         ld4 r34=[r2],8                          // r10 == edx
124         ld4 r36=[r3],8                          // r15 == edi
125 (p6)    shladd r16=r8,3,r16     // force ni_syscall if not valid syscall number
126         ;;
127         ld8 r16=[r16]
128         ;;
129         ld4 r32=[r2],8                          // r11 == ebx
130         mov b6=r16
131         ld4 r35=[r3],8                          // r14 == esi
132         br.call.sptk.few rp=b6                  // do the syscall
133 .ia32_strace_check_retval:
134         cmp.lt p6,p0=r8,r0                      // syscall failed?
135         adds r2=IA64_PT_REGS_R8_OFFSET+16,sp    // r2 = &pt_regs.r8
136         ;;
137         st8.spill [r2]=r8                       // store return value in slot for r8
138         br.call.sptk.few rp=syscall_trace_leave // give parent a chance to catch return value
139 .ret4:  alloc r2=ar.pfs,0,0,0,0                 // drop the syscall argument frame
140         br.cond.sptk.many ia64_leave_kernel
141 END(ia32_trace_syscall)
142
143 GLOBAL_ENTRY(sys32_vfork)
144         alloc r16=ar.pfs,2,2,4,0;;
145         mov out0=IA64_CLONE_VFORK|IA64_CLONE_VM|SIGCHLD // out0 = clone_flags
146         br.cond.sptk.few .fork1                 // do the work
147 END(sys32_vfork)
148
149 GLOBAL_ENTRY(sys32_fork)
150         .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(2)
151         alloc r16=ar.pfs,2,2,4,0
152         mov out0=SIGCHLD                        // out0 = clone_flags
153         ;;
154 .fork1:
155         mov loc0=rp
156         mov loc1=r16                            // save ar.pfs across do_fork
157         DO_SAVE_SWITCH_STACK
158
159         .body
160
161         mov out1=0
162         mov out3=0
163         adds out2=IA64_SWITCH_STACK_SIZE+16,sp  // out2 = &regs
164         br.call.sptk.few rp=do_fork
165 .ret5:  .restore sp
166         adds sp=IA64_SWITCH_STACK_SIZE,sp       // pop the switch stack
167         mov ar.pfs=loc1
168         mov rp=loc0
169         br.ret.sptk.many rp
170 END(sys32_fork)
171
172         .rodata
173         .align 8
174         .globl ia32_syscall_table
175 ia32_syscall_table:
176         data8 sys_ni_syscall      /* 0  -  old "setup(" system call*/
177         data8 sys_exit
178         data8 sys32_fork
179         data8 sys_read
180         data8 sys_write
181         data8 compat_sys_open     /* 5 */
182         data8 sys_close
183         data8 sys32_waitpid
184         data8 sys_creat
185         data8 sys_link
186         data8 sys_unlink          /* 10 */
187         data8 ia32_execve
188         data8 sys_chdir
189         data8 compat_sys_time
190         data8 sys_mknod
191         data8 sys_chmod           /* 15 */
192         data8 sys_lchown        /* 16-bit version */
193         data8 sys_ni_syscall      /* old break syscall holder */
194         data8 sys_ni_syscall
195         data8 sys32_lseek
196         data8 sys_getpid          /* 20 */
197         data8 compat_sys_mount
198         data8 sys_oldumount
199         data8 sys_setuid        /* 16-bit version */
200         data8 sys_getuid        /* 16-bit version */
201         data8 compat_sys_stime    /* 25 */
202         data8 sys32_ptrace
203         data8 sys32_alarm
204         data8 sys_ni_syscall
205         data8 sys32_pause
206         data8 compat_sys_utime    /* 30 */
207         data8 sys_ni_syscall      /* old stty syscall holder */
208         data8 sys_ni_syscall      /* old gtty syscall holder */
209         data8 sys_access
210         data8 sys_nice
211         data8 sys_ni_syscall      /* 35 */        /* old ftime syscall holder */
212         data8 sys_sync
213         data8 sys_kill
214         data8 sys_rename
215         data8 sys_mkdir
216         data8 sys_rmdir           /* 40 */
217         data8 sys_dup
218         data8 sys32_pipe
219         data8 compat_sys_times
220         data8 sys_ni_syscall      /* old prof syscall holder */
221         data8 sys32_brk           /* 45 */
222         data8 sys_setgid        /* 16-bit version */
223         data8 sys_getgid        /* 16-bit version */
224         data8 sys32_signal
225         data8 sys_geteuid       /* 16-bit version */
226         data8 sys_getegid       /* 16-bit version */      /* 50 */
227         data8 sys_acct
228         data8 sys_umount          /* recycled never used phys( */
229         data8 sys_ni_syscall      /* old lock syscall holder */
230         data8 compat_sys_ioctl
231         data8 compat_sys_fcntl    /* 55 */
232         data8 sys_ni_syscall      /* old mpx syscall holder */
233         data8 sys_setpgid
234         data8 sys_ni_syscall      /* old ulimit syscall holder */
235         data8 sys_ni_syscall
236         data8 sys_umask           /* 60 */
237         data8 sys_chroot
238         data8 sys_ustat
239         data8 sys_dup2
240         data8 sys_getppid
241         data8 sys_getpgrp         /* 65 */
242         data8 sys_setsid
243         data8 sys32_sigaction
244         data8 sys_ni_syscall
245         data8 sys_ni_syscall
246         data8 sys_setreuid      /* 16-bit version */      /* 70 */
247         data8 sys_setregid      /* 16-bit version */
248         data8 sys32_sigsuspend
249         data8 compat_sys_sigpending
250         data8 sys_sethostname
251         data8 compat_sys_setrlimit        /* 75 */
252         data8 compat_sys_old_getrlimit
253         data8 compat_sys_getrusage
254         data8 sys32_gettimeofday
255         data8 sys32_settimeofday
256         data8 sys32_getgroups16   /* 80 */
257         data8 sys32_setgroups16
258         data8 sys32_old_select
259         data8 sys_symlink
260         data8 sys_ni_syscall
261         data8 sys_readlink        /* 85 */
262         data8 sys_uselib
263         data8 sys_swapon
264         data8 sys_reboot
265         data8 sys32_readdir
266         data8 sys32_mmap          /* 90 */
267         data8 sys32_munmap
268         data8 sys_truncate
269         data8 sys_ftruncate
270         data8 sys_fchmod
271         data8 sys_fchown        /* 16-bit version */      /* 95 */
272         data8 sys_getpriority
273         data8 sys_setpriority
274         data8 sys_ni_syscall      /* old profil syscall holder */
275         data8 compat_sys_statfs
276         data8 compat_sys_fstatfs          /* 100 */
277         data8 sys_ni_syscall    /* ioperm */
278         data8 compat_sys_socketcall
279         data8 sys_syslog
280         data8 compat_sys_setitimer
281         data8 compat_sys_getitimer        /* 105 */
282         data8 compat_sys_newstat
283         data8 compat_sys_newlstat
284         data8 compat_sys_newfstat
285         data8 sys_ni_syscall
286         data8 sys_ni_syscall    /* iopl */      /* 110 */
287         data8 sys_vhangup
288         data8 sys_ni_syscall            /* used to be sys_idle */
289         data8 sys_ni_syscall
290         data8 compat_sys_wait4
291         data8 sys_swapoff         /* 115 */
292         data8 compat_sys_sysinfo
293         data8 sys32_ipc
294         data8 sys_fsync
295         data8 sys32_sigreturn
296         data8 ia32_clone          /* 120 */
297         data8 sys_setdomainname
298         data8 sys32_newuname
299         data8 sys32_modify_ldt
300         data8 compat_sys_adjtimex
301         data8 sys32_mprotect      /* 125 */
302         data8 compat_sys_sigprocmask
303         data8 sys_ni_syscall    /* create_module */
304         data8 sys_ni_syscall    /* init_module */
305         data8 sys_ni_syscall    /* delete_module */
306         data8 sys_ni_syscall    /* get_kernel_syms */  /* 130 */
307         data8 sys32_quotactl
308         data8 sys_getpgid
309         data8 sys_fchdir
310         data8 sys_ni_syscall    /* sys_bdflush */
311         data8 sys_sysfs         /* 135 */
312         data8 sys32_personality
313         data8 sys_ni_syscall      /* for afs_syscall */
314         data8 sys_setfsuid      /* 16-bit version */
315         data8 sys_setfsgid      /* 16-bit version */
316         data8 sys_llseek          /* 140 */
317         data8 compat_sys_getdents
318         data8 compat_sys_select
319         data8 sys_flock
320         data8 sys32_msync
321         data8 compat_sys_readv    /* 145 */
322         data8 compat_sys_writev
323         data8 sys_getsid
324         data8 sys_fdatasync
325         data8 sys32_sysctl
326         data8 sys_mlock           /* 150 */
327         data8 sys_munlock
328         data8 sys_mlockall
329         data8 sys_munlockall
330         data8 sys_sched_setparam
331         data8 sys_sched_getparam  /* 155 */
332         data8 sys_sched_setscheduler
333         data8 sys_sched_getscheduler
334         data8 sys_sched_yield
335         data8 sys_sched_get_priority_max
336         data8 sys_sched_get_priority_min         /* 160 */
337         data8 sys32_sched_rr_get_interval
338         data8 compat_sys_nanosleep
339         data8 sys32_mremap
340         data8 sys_setresuid     /* 16-bit version */
341         data8 sys32_getresuid16 /* 16-bit version */      /* 165 */
342         data8 sys_ni_syscall    /* vm86 */
343         data8 sys_ni_syscall    /* sys_query_module */
344         data8 sys_poll
345         data8 sys_ni_syscall    /* nfsservctl */
346         data8 sys_setresgid       /* 170 */
347         data8 sys32_getresgid16
348         data8 sys_prctl
349         data8 sys32_rt_sigreturn
350         data8 sys32_rt_sigaction
351         data8 sys32_rt_sigprocmask /* 175 */
352         data8 sys_rt_sigpending
353         data8 compat_sys_rt_sigtimedwait
354         data8 sys32_rt_sigqueueinfo
355         data8 compat_sys_rt_sigsuspend
356         data8 sys32_pread         /* 180 */
357         data8 sys32_pwrite
358         data8 sys_chown /* 16-bit version */
359         data8 sys_getcwd
360         data8 sys_capget
361         data8 sys_capset          /* 185 */
362         data8 sys32_sigaltstack
363         data8 sys32_sendfile
364         data8 sys_ni_syscall              /* streams1 */
365         data8 sys_ni_syscall              /* streams2 */
366         data8 sys32_vfork         /* 190 */
367         data8 compat_sys_getrlimit
368         data8 sys32_mmap2
369         data8 sys32_truncate64
370         data8 sys32_ftruncate64
371         data8 sys32_stat64        /* 195 */
372         data8 sys32_lstat64
373         data8 sys32_fstat64
374         data8 sys_lchown
375         data8 sys_getuid
376         data8 sys_getgid          /* 200 */
377         data8 sys_geteuid
378         data8 sys_getegid
379         data8 sys_setreuid
380         data8 sys_setregid
381         data8 sys_getgroups       /* 205 */
382         data8 sys_setgroups
383         data8 sys_fchown
384         data8 sys_setresuid
385         data8 sys_getresuid
386         data8 sys_setresgid       /* 210 */
387         data8 sys_getresgid
388         data8 sys_chown
389         data8 sys_setuid
390         data8 sys_setgid
391         data8 sys_setfsuid        /* 215 */
392         data8 sys_setfsgid
393         data8 sys_pivot_root
394         data8 sys_mincore
395         data8 sys_madvise
396         data8 compat_sys_getdents64       /* 220 */
397         data8 compat_sys_fcntl64
398         data8 sys_ni_syscall            /* reserved for TUX */
399         data8 sys_ni_syscall            /* reserved for Security */
400         data8 sys_gettid
401         data8 sys_readahead       /* 225 */
402         data8 sys_setxattr
403         data8 sys_lsetxattr
404         data8 sys_fsetxattr
405         data8 sys_getxattr
406         data8 sys_lgetxattr     /* 230 */
407         data8 sys_fgetxattr
408         data8 sys_listxattr
409         data8 sys_llistxattr
410         data8 sys_flistxattr
411         data8 sys_removexattr   /* 235 */
412         data8 sys_lremovexattr
413         data8 sys_fremovexattr
414         data8 sys_tkill
415         data8 sys_sendfile64
416         data8 compat_sys_futex  /* 240 */
417         data8 compat_sys_sched_setaffinity
418         data8 compat_sys_sched_getaffinity
419         data8 sys32_set_thread_area
420         data8 sys32_get_thread_area
421         data8 compat_sys_io_setup       /* 245 */
422         data8 sys_io_destroy
423         data8 compat_sys_io_getevents
424         data8 compat_sys_io_submit
425         data8 sys_io_cancel
426         data8 sys_fadvise64     /* 250 */
427         data8 sys_ni_syscall
428         data8 sys_exit_group
429         data8 sys_lookup_dcookie
430         data8 sys_epoll_create
431         data8 sys32_epoll_ctl   /* 255 */
432         data8 sys32_epoll_wait
433         data8 sys_remap_file_pages
434         data8 sys_set_tid_address
435         data8 compat_sys_timer_create
436         data8 compat_sys_timer_settime  /* 260 */
437         data8 compat_sys_timer_gettime
438         data8 sys_timer_getoverrun
439         data8 sys_timer_delete
440         data8 compat_sys_clock_settime
441         data8 compat_sys_clock_gettime /* 265 */
442         data8 compat_sys_clock_getres
443         data8 compat_sys_clock_nanosleep
444         data8 compat_sys_statfs64
445         data8 compat_sys_fstatfs64
446         data8 sys_tgkill        /* 270 */
447         data8 compat_sys_utimes
448         data8 sys32_fadvise64_64
449         data8 sys_ni_syscall
450         data8 sys_ni_syscall
451         data8 sys_ni_syscall    /* 275 */
452         data8 sys_ni_syscall
453         data8 compat_sys_mq_open
454         data8 sys_mq_unlink
455         data8 compat_sys_mq_timedsend
456         data8 compat_sys_mq_timedreceive        /* 280 */
457         data8 compat_sys_mq_notify
458         data8 compat_sys_mq_getsetattr
459         data8 sys_ni_syscall            /* reserved for kexec */
460         data8 compat_sys_waitid
461
462         // guard against failures to increase IA32_NR_syscalls
463         .org ia32_syscall_table + 8*IA32_NR_syscalls