2 * Compatibility mode system call entry point for x86-64.
4 * Copyright 2000-2002 Andi Kleen, SuSE Labs.
7 #include <asm/dwarf2.h>
8 #include <asm/calling.h>
9 #include <asm/offset.h>
10 #include <asm/current.h>
11 #include <asm/errno.h>
12 #include <asm/ia32_unistd.h>
13 #include <asm/thread_info.h>
14 #include <asm/segment.h>
15 #include <asm/vsyscall32.h>
16 #include <linux/linkage.h>
18 .macro IA32_ARG_FIXUP noebp=0
26 movl %edx,%edx /* zero extension */
39 * 32bit SYSENTER instruction entry.
42 * %eax System call number.
53 * This is purely a fast path. For anything complicated we use the int 0x80
54 * path below. Set up a complete hardware stack frame to share code
55 * with the int 0x80 path.
57 ENTRY(ia32_sysenter_target)
60 movq %gs:pda_kernelstack, %rsp
61 addq $(PDA_STACKOFFSET),%rsp
63 movl %ebp,%ebp /* zero extension */
67 movl $VSYSCALL32_SYSEXIT, %r10d
74 /* no need to do an access_ok check here because rbp has been
75 32bit zero extended */
77 .section __ex_table,"a"
81 testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),threadinfo_flags(%r10)
84 cmpl $(IA32_NR_syscalls),%eax
87 call *ia32_sys_call_table(,%rax,8)
88 movq %rax,RAX-ARGOFFSET(%rsp)
91 testl $_TIF_ALLWORK_MASK,threadinfo_flags(%r10)
92 jnz int_ret_from_sys_call
93 /* clear IF, that popfq doesn't enable interrupts early */
94 andl $~0x200,EFLAGS-R11(%rsp)
95 RESTORE_ARGS 1,24,1,1,1,1
97 popq %rcx /* User %esp */
98 movl $VSYSCALL32_SYSEXIT,%edx /* User %eip */
100 sti /* sti only takes effect after the next instruction */
107 movq $-ENOSYS,RAX(%rsp) /* really needed? */
108 movq %rsp,%rdi /* &pt_regs -> arg1 */
109 call syscall_trace_enter
110 LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */
113 /* no need to do an access_ok check here because rbp has been
114 32bit zero extended */
116 .section __ex_table,"a"
123 * 32bit SYSCALL instruction entry.
126 * %eax System call number.
132 * %ebp Arg2 [note: not saved in the stack frame, should not be touched]
138 * This is purely a fast path. For anything complicated we use the int 0x80
139 * path below. Set up a complete hardware stack frame to share code
140 * with the int 0x80 path.
142 ENTRY(ia32_cstar_target)
146 movq %gs:pda_kernelstack,%rsp
149 movl %eax,%eax /* zero extension */
150 movq %rax,ORIG_RAX-ARGOFFSET(%rsp)
151 movq %rcx,RIP-ARGOFFSET(%rsp)
152 movq %rbp,RCX-ARGOFFSET(%rsp) /* this lies slightly to ptrace */
154 movq $__USER32_CS,CS-ARGOFFSET(%rsp)
155 movq $__USER32_DS,SS-ARGOFFSET(%rsp)
156 movq %r11,EFLAGS-ARGOFFSET(%rsp)
157 movq %r8,RSP-ARGOFFSET(%rsp)
158 /* no need to do an access_ok check here because r8 has been
159 32bit zero extended */
160 /* hardware stack frame is complete now */
162 .section __ex_table,"a"
165 GET_THREAD_INFO(%r10)
166 testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),threadinfo_flags(%r10)
169 cmpl $IA32_NR_syscalls,%eax
172 call *ia32_sys_call_table(,%rax,8)
173 movq %rax,RAX-ARGOFFSET(%rsp)
174 GET_THREAD_INFO(%r10)
176 testl $_TIF_ALLWORK_MASK,threadinfo_flags(%r10)
177 jnz int_ret_from_sys_call
178 RESTORE_ARGS 1,-ARG_SKIP,1,1,1
179 movl RIP-ARGOFFSET(%rsp),%ecx
180 movl EFLAGS-ARGOFFSET(%rsp),%r11d
181 movl RSP-ARGOFFSET(%rsp),%esp
188 movq $-ENOSYS,RAX(%rsp) /* really needed? */
189 movq %rsp,%rdi /* &pt_regs -> arg1 */
190 call syscall_trace_enter
191 LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */
193 movl RSP-ARGOFFSET(%rsp), %r8d
194 /* no need to do an access_ok check here because r8 has been
195 32bit zero extended */
197 .section __ex_table,"a"
208 * Emulated IA32 system calls via int 0x80.
211 * %eax System call number.
217 * %ebp Arg6 [note: not saved in the stack frame, should not be touched]
220 * Uses the same stack frame as the x86-64 version.
221 * All registers except %eax must be saved (but ptrace may violate that)
222 * Arguments are zero extended. For system calls that want sign extension and
223 * take long arguments a wrapper is needed. Most calls can just be called
225 * Assumes it is only called from user space and entered with interrupts off.
235 /* note the registers are not zero extended to the sf.
236 this could be a problem. */
238 GET_THREAD_INFO(%r10)
239 testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),threadinfo_flags(%r10)
242 cmpl $(IA32_NR_syscalls),%eax
245 call *ia32_sys_call_table(,%rax,8) # xxx: rip relative
247 movq %rax,RAX-ARGOFFSET(%rsp)
248 jmp int_ret_from_sys_call
252 movq $-ENOSYS,RAX(%rsp) /* really needed? */
253 movq %rsp,%rdi /* &pt_regs -> arg1 */
254 call syscall_trace_enter
255 LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */
260 movq $0,ORIG_RAX-ARGOFFSET(%rsp)
261 movq $-ENOSYS,RAX-ARGOFFSET(%rsp)
262 jmp int_ret_from_sys_call
273 .macro PTREGSCALL label, func
276 leaq \func(%rip),%rax
277 jmp ia32_ptregs_common
280 PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn
281 PTREGSCALL stub32_sigreturn, sys32_sigreturn
282 PTREGSCALL stub32_sigaltstack, sys32_sigaltstack
283 PTREGSCALL stub32_sigsuspend, sys32_sigsuspend
284 PTREGSCALL stub32_execve, sys32_execve
285 PTREGSCALL stub32_fork, sys_fork
286 PTREGSCALL stub32_clone, sys32_clone
287 PTREGSCALL stub32_vfork, sys_vfork
288 PTREGSCALL stub32_iopl, sys_iopl
289 PTREGSCALL stub32_rt_sigsuspend, sys_rt_sigsuspend
291 ENTRY(ia32_ptregs_common)
299 leaq ia32_sysret(%rip),%r11
306 .globl ia32_sys_call_table
308 .quad sys_restart_syscall
313 .quad sys32_open /* 5 */
318 .quad sys_unlink /* 10 */
323 .quad sys_chmod /* 15 */
325 .quad quiet_ni_syscall /* old break syscall holder */
328 .quad sys_getpid /* 20 */
329 .quad compat_sys_mount /* mount */
330 .quad sys_oldumount /* old_umount */
333 .quad sys_stime /* stime */ /* 25 */
334 .quad sys32_ptrace /* ptrace */
335 .quad sys_alarm /* XXX sign extension??? */
336 .quad sys_fstat /* (old)fstat */
338 .quad compat_sys_utime /* 30 */
339 .quad quiet_ni_syscall /* old stty syscall holder */
340 .quad quiet_ni_syscall /* old gtty syscall holder */
343 .quad quiet_ni_syscall /* 35 */ /* old ftime syscall holder */
348 .quad sys_rmdir /* 40 */
351 .quad compat_sys_times
352 .quad quiet_ni_syscall /* old prof syscall holder */
353 .quad sys_brk /* 45 */
358 .quad sys_getegid16 /* 50 */
360 .quad sys_umount /* new_umount */
361 .quad quiet_ni_syscall /* old lock syscall holder */
362 .quad compat_sys_ioctl
363 .quad compat_sys_fcntl64 /* 55 */
364 .quad quiet_ni_syscall /* old mpx syscall holder */
366 .quad quiet_ni_syscall /* old ulimit syscall holder */
368 .quad sys_umask /* 60 */
373 .quad sys_getpgrp /* 65 */
375 .quad sys32_sigaction
378 .quad sys_setreuid16 /* 70 */
380 .quad stub32_sigsuspend
381 .quad compat_sys_sigpending
382 .quad sys_sethostname
383 .quad compat_sys_setrlimit /* 75 */
384 .quad compat_sys_old_getrlimit /* old_getrlimit */
385 .quad compat_sys_getrusage
386 .quad sys32_gettimeofday
387 .quad sys32_settimeofday
388 .quad sys_getgroups16 /* 80 */
389 .quad sys_setgroups16
390 .quad sys32_old_select
393 .quad sys_readlink /* 85 */
397 .quad sys32_oldreaddir
398 .quad sys32_mmap /* 90 */
403 .quad sys_fchown16 /* 95 */
404 .quad sys_getpriority
405 .quad sys_setpriority
406 .quad quiet_ni_syscall /* old profil syscall holder */
407 .quad compat_sys_statfs
408 .quad compat_sys_fstatfs /* 100 */
410 .quad compat_sys_socketcall
412 .quad compat_sys_setitimer
413 .quad compat_sys_getitimer /* 105 */
414 .quad compat_sys_newstat
415 .quad compat_sys_newlstat
416 .quad compat_sys_newfstat
418 .quad stub32_iopl /* 110 */
420 .quad quiet_ni_syscall /* old "idle" system call */
421 .quad sys32_vm86_warning /* vm86old */
422 .quad compat_sys_wait4
423 .quad sys_swapoff /* 115 */
427 .quad stub32_sigreturn
428 .quad stub32_clone /* 120 */
429 .quad sys_setdomainname
433 .quad sys32_mprotect /* 125 */
434 .quad compat_sys_sigprocmask
435 .quad quiet_ni_syscall /* create_module */
436 .quad sys_init_module
437 .quad sys_delete_module
438 .quad quiet_ni_syscall /* 130 get_kernel_syms */
439 .quad sys32_quotactl /* quotactl */
442 .quad quiet_ni_syscall /* bdflush */
443 .quad sys_sysfs /* 135 */
444 .quad sys_personality
445 .quad quiet_ni_syscall /* for afs_syscall */
448 .quad sys_llseek /* 140 */
450 .quad compat_sys_select
453 .quad compat_sys_readv /* 145 */
454 .quad compat_sys_writev
457 .quad sys32_sysctl /* sysctl */
458 .quad sys_mlock /* 150 */
462 .quad sys_sched_setparam
463 .quad sys_sched_getparam /* 155 */
464 .quad sys_sched_setscheduler
465 .quad sys_sched_getscheduler
466 .quad sys_sched_yield
467 .quad sys_sched_get_priority_max
468 .quad sys_sched_get_priority_min /* 160 */
469 .quad sys_sched_rr_get_interval
470 .quad compat_sys_nanosleep
472 .quad sys_setresuid16
473 .quad sys_getresuid16 /* 165 */
474 .quad sys32_vm86_warning /* vm86 */
475 .quad quiet_ni_syscall /* query_module */
477 .quad compat_sys_nfsservctl
478 .quad sys_setresgid16 /* 170 */
479 .quad sys_getresgid16
481 .quad stub32_rt_sigreturn
482 .quad sys32_rt_sigaction
483 .quad sys32_rt_sigprocmask /* 175 */
484 .quad sys32_rt_sigpending
485 .quad sys32_rt_sigtimedwait
486 .quad sys32_rt_sigqueueinfo
487 .quad stub32_rt_sigsuspend
488 .quad sys32_pread /* 180 */
494 .quad stub32_sigaltstack
496 .quad quiet_ni_syscall /* streams1 */
497 .quad quiet_ni_syscall /* streams2 */
498 .quad stub32_vfork /* 190 */
499 .quad compat_sys_getrlimit
501 .quad sys32_truncate64
502 .quad sys32_ftruncate64
503 .quad sys32_stat64 /* 195 */
508 .quad sys_getgid /* 200 */
513 .quad sys_getgroups /* 205 */
518 .quad sys_setresgid /* 210 */
523 .quad sys_setfsuid /* 215 */
528 .quad sys_getdents64 /* 220 getdents64 */
529 .quad compat_sys_fcntl64
530 .quad quiet_ni_syscall /* tux */
531 .quad quiet_ni_syscall /* security */
533 .quad sys_readahead /* 225 */
538 .quad sys_lgetxattr /* 230 */
543 .quad sys_removexattr /* 235 */
544 .quad sys_lremovexattr
545 .quad sys_fremovexattr
548 .quad compat_sys_futex /* 240 */
549 .quad compat_sys_sched_setaffinity
550 .quad compat_sys_sched_getaffinity
551 .quad sys32_set_thread_area
552 .quad sys32_get_thread_area
553 .quad sys32_io_setup /* 245 */
555 .quad sys32_io_getevents
556 .quad sys32_io_submit
558 .quad sys_fadvise64 /* 250 */
559 .quad quiet_ni_syscall /* free_huge_pages */
561 .quad sys_lookup_dcookie
562 .quad sys_epoll_create
563 .quad sys_epoll_ctl /* 255 */
565 .quad sys_remap_file_pages
566 .quad sys_set_tid_address
567 .quad sys32_timer_create
568 .quad compat_timer_settime /* 260 */
569 .quad compat_timer_gettime
570 .quad sys_timer_getoverrun
571 .quad sys_timer_delete
572 .quad compat_clock_settime
573 .quad compat_clock_gettime /* 265 */
574 .quad compat_clock_getres
575 .quad compat_clock_nanosleep
576 .quad compat_statfs64
577 .quad compat_fstatfs64
578 .quad sys_tgkill /* 270 */
579 .quad compat_sys_utimes
580 .quad sys32_fadvise64_64
583 .quad compat_get_mempolicy /* 275 */
584 .quad sys_set_mempolicy
585 .quad compat_sys_mq_open
587 .quad compat_sys_mq_timedsend
588 .quad compat_sys_mq_timedreceive /* 280 */
589 .quad compat_sys_mq_notify
590 .quad compat_sys_mq_getsetattr
591 .quad quiet_ni_syscall /* reserved for kexec */
592 /* don't forget to change IA32_NR_syscalls */
594 .rept IA32_NR_syscalls-(ia32_syscall_end-ia32_sys_call_table)/8