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/asm-offsets.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/irqflags.h>
16 #include <linux/linkage.h>
18 #define IA32_NR_syscalls ((ia32_syscall_end - ia32_sys_call_table)/8)
20 .macro IA32_ARG_FIXUP noebp=0
28 movl %edx,%edx /* zero extension */
40 .macro LOAD_ARGS32 offset
41 movl \offset(%rsp),%r11d
42 movl \offset+8(%rsp),%r10d
43 movl \offset+16(%rsp),%r9d
44 movl \offset+24(%rsp),%r8d
45 movl \offset+40(%rsp),%ecx
46 movl \offset+48(%rsp),%edx
47 movl \offset+56(%rsp),%esi
48 movl \offset+64(%rsp),%edi
49 movl \offset+72(%rsp),%eax
52 .macro CFI_STARTPROC32 simple
64 #ifdef CONFIG_PARAVIRT
65 ENTRY(native_usergs_sysret32)
68 ENDPROC(native_usergs_sysret32)
70 ENTRY(native_irq_enable_sysexit)
74 ENDPROC(native_irq_enable_sysexit)
78 * 32bit SYSENTER instruction entry.
81 * %eax System call number.
92 * This is purely a fast path. For anything complicated we use the int 0x80
93 * path below. Set up a complete hardware stack frame to share code
94 * with the int 0x80 path.
96 ENTRY(ia32_sysenter_target)
97 CFI_STARTPROC32 simple
102 movq %gs:pda_kernelstack, %rsp
103 addq $(PDA_STACKOFFSET),%rsp
105 * No need to follow this irqs on/off section: the syscall
106 * disabled irqs, here we enable it straight after entry:
108 ENABLE_INTERRUPTS(CLBR_NONE)
109 movl %ebp,%ebp /* zero extension */
111 CFI_ADJUST_CFA_OFFSET 8
112 /*CFI_REL_OFFSET ss,0*/
114 CFI_ADJUST_CFA_OFFSET 8
117 CFI_ADJUST_CFA_OFFSET 8
118 /*CFI_REL_OFFSET rflags,0*/
119 movl 8*3-THREAD_SIZE+threadinfo_sysenter_return(%rsp), %r10d
122 CFI_ADJUST_CFA_OFFSET 8
123 /*CFI_REL_OFFSET cs,0*/
126 CFI_ADJUST_CFA_OFFSET 8
129 CFI_ADJUST_CFA_OFFSET 8
132 /* no need to do an access_ok check here because rbp has been
133 32bit zero extended */
135 .section __ex_table,"a"
138 GET_THREAD_INFO(%r10)
139 orl $TS_COMPAT,threadinfo_status(%r10)
140 testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
142 jnz sysenter_tracesys
144 cmpl $(IA32_NR_syscalls-1),%eax
147 call *ia32_sys_call_table(,%rax,8)
148 movq %rax,RAX-ARGOFFSET(%rsp)
149 GET_THREAD_INFO(%r10)
150 DISABLE_INTERRUPTS(CLBR_NONE)
152 testl $_TIF_ALLWORK_MASK,threadinfo_flags(%r10)
153 jnz int_ret_from_sys_call
154 andl $~TS_COMPAT,threadinfo_status(%r10)
155 /* clear IF, that popfq doesn't enable interrupts early */
156 andl $~0x200,EFLAGS-R11(%rsp)
157 movl RIP-R11(%rsp),%edx /* User %eip */
159 RESTORE_ARGS 1,24,1,1,1,1
161 CFI_ADJUST_CFA_OFFSET -8
162 /*CFI_RESTORE rflags*/
163 popq %rcx /* User %esp */
164 CFI_ADJUST_CFA_OFFSET -8
167 ENABLE_INTERRUPTS_SYSEXIT32
175 movq $-ENOSYS,RAX(%rsp)/* ptrace can change this for a bad syscall */
176 movq %rsp,%rdi /* &pt_regs -> arg1 */
177 call syscall_trace_enter
178 LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
181 cmpl $(IA32_NR_syscalls-1),%eax
182 ja int_ret_from_sys_call /* sysenter_tracesys has set RAX(%rsp) */
185 ENDPROC(ia32_sysenter_target)
188 * 32bit SYSCALL instruction entry.
191 * %eax System call number.
197 * %ebp Arg2 [note: not saved in the stack frame, should not be touched]
203 * This is purely a fast path. For anything complicated we use the int 0x80
204 * path below. Set up a complete hardware stack frame to share code
205 * with the int 0x80 path.
207 ENTRY(ia32_cstar_target)
208 CFI_STARTPROC32 simple
210 CFI_DEF_CFA rsp,PDA_STACKOFFSET
212 /*CFI_REGISTER rflags,r11*/
216 movq %gs:pda_kernelstack,%rsp
218 * No need to follow this irqs on/off section: the syscall
219 * disabled irqs and here we enable it straight after entry:
221 ENABLE_INTERRUPTS(CLBR_NONE)
223 movl %eax,%eax /* zero extension */
224 movq %rax,ORIG_RAX-ARGOFFSET(%rsp)
225 movq %rcx,RIP-ARGOFFSET(%rsp)
226 CFI_REL_OFFSET rip,RIP-ARGOFFSET
227 movq %rbp,RCX-ARGOFFSET(%rsp) /* this lies slightly to ptrace */
229 movq $__USER32_CS,CS-ARGOFFSET(%rsp)
230 movq $__USER32_DS,SS-ARGOFFSET(%rsp)
231 movq %r11,EFLAGS-ARGOFFSET(%rsp)
232 /*CFI_REL_OFFSET rflags,EFLAGS-ARGOFFSET*/
233 movq %r8,RSP-ARGOFFSET(%rsp)
234 CFI_REL_OFFSET rsp,RSP-ARGOFFSET
235 /* no need to do an access_ok check here because r8 has been
236 32bit zero extended */
237 /* hardware stack frame is complete now */
239 .section __ex_table,"a"
242 GET_THREAD_INFO(%r10)
243 orl $TS_COMPAT,threadinfo_status(%r10)
244 testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
248 cmpl $IA32_NR_syscalls-1,%eax
251 call *ia32_sys_call_table(,%rax,8)
252 movq %rax,RAX-ARGOFFSET(%rsp)
253 GET_THREAD_INFO(%r10)
254 DISABLE_INTERRUPTS(CLBR_NONE)
256 testl $_TIF_ALLWORK_MASK,threadinfo_flags(%r10)
257 jnz int_ret_from_sys_call
258 andl $~TS_COMPAT,threadinfo_status(%r10)
259 RESTORE_ARGS 1,-ARG_SKIP,1,1,1
260 movl RIP-ARGOFFSET(%rsp),%ecx
262 movl EFLAGS-ARGOFFSET(%rsp),%r11d
263 /*CFI_REGISTER rflags,r11*/
265 movl RSP-ARGOFFSET(%rsp),%esp
275 movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */
276 movq %rsp,%rdi /* &pt_regs -> arg1 */
277 call syscall_trace_enter
278 LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
281 movl RSP-ARGOFFSET(%rsp), %r8d
282 cmpl $(IA32_NR_syscalls-1),%eax
283 ja int_ret_from_sys_call /* cstar_tracesys has set RAX(%rsp) */
285 END(ia32_cstar_target)
293 * Emulated IA32 system calls via int 0x80.
296 * %eax System call number.
302 * %ebp Arg6 [note: not saved in the stack frame, should not be touched]
305 * Uses the same stack frame as the x86-64 version.
306 * All registers except %eax must be saved (but ptrace may violate that)
307 * Arguments are zero extended. For system calls that want sign extension and
308 * take long arguments a wrapper is needed. Most calls can just be called
310 * Assumes it is only called from user space and entered with interrupts off.
314 CFI_STARTPROC32 simple
316 CFI_DEF_CFA rsp,SS+8-RIP
317 /*CFI_REL_OFFSET ss,SS-RIP*/
318 CFI_REL_OFFSET rsp,RSP-RIP
319 /*CFI_REL_OFFSET rflags,EFLAGS-RIP*/
320 /*CFI_REL_OFFSET cs,CS-RIP*/
321 CFI_REL_OFFSET rip,RIP-RIP
324 * No need to follow this irqs on/off section: the syscall
325 * disabled irqs and here we enable it straight after entry:
327 ENABLE_INTERRUPTS(CLBR_NONE)
330 CFI_ADJUST_CFA_OFFSET 8
332 /* note the registers are not zero extended to the sf.
333 this could be a problem. */
335 GET_THREAD_INFO(%r10)
336 orl $TS_COMPAT,threadinfo_status(%r10)
337 testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
340 cmpl $(IA32_NR_syscalls-1),%eax
341 ja int_ret_from_sys_call /* ia32_tracesys has set RAX(%rsp) */
343 call *ia32_sys_call_table(,%rax,8) # xxx: rip relative
345 movq %rax,RAX-ARGOFFSET(%rsp)
346 jmp int_ret_from_sys_call
351 movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */
352 movq %rsp,%rdi /* &pt_regs -> arg1 */
353 call syscall_trace_enter
354 LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
360 movq $0,ORIG_RAX-ARGOFFSET(%rsp)
361 movq $-ENOSYS,RAX-ARGOFFSET(%rsp)
362 jmp int_ret_from_sys_call
369 .macro PTREGSCALL label, func, arg
372 leaq \func(%rip),%rax
373 leaq -ARGOFFSET+8(%rsp),\arg /* 8 for return address */
374 jmp ia32_ptregs_common
379 PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn, %rdi
380 PTREGSCALL stub32_sigreturn, sys32_sigreturn, %rdi
381 PTREGSCALL stub32_sigaltstack, sys32_sigaltstack, %rdx
382 PTREGSCALL stub32_execve, sys32_execve, %rcx
383 PTREGSCALL stub32_fork, sys_fork, %rdi
384 PTREGSCALL stub32_clone, sys32_clone, %rdx
385 PTREGSCALL stub32_vfork, sys_vfork, %rdi
386 PTREGSCALL stub32_iopl, sys_iopl, %rsi
388 ENTRY(ia32_ptregs_common)
391 CFI_STARTPROC32 simple
393 CFI_DEF_CFA rsp,SS+8-ARGOFFSET
394 CFI_REL_OFFSET rax,RAX-ARGOFFSET
395 CFI_REL_OFFSET rcx,RCX-ARGOFFSET
396 CFI_REL_OFFSET rdx,RDX-ARGOFFSET
397 CFI_REL_OFFSET rsi,RSI-ARGOFFSET
398 CFI_REL_OFFSET rdi,RDI-ARGOFFSET
399 CFI_REL_OFFSET rip,RIP-ARGOFFSET
400 /* CFI_REL_OFFSET cs,CS-ARGOFFSET*/
401 /* CFI_REL_OFFSET rflags,EFLAGS-ARGOFFSET*/
402 CFI_REL_OFFSET rsp,RSP-ARGOFFSET
403 /* CFI_REL_OFFSET ss,SS-ARGOFFSET*/
407 jmp ia32_sysret /* misbalances the return cache */
409 END(ia32_ptregs_common)
414 .quad sys_restart_syscall
419 .quad compat_sys_open /* 5 */
424 .quad sys_unlink /* 10 */
427 .quad compat_sys_time
429 .quad sys_chmod /* 15 */
431 .quad quiet_ni_syscall /* old break syscall holder */
434 .quad sys_getpid /* 20 */
435 .quad compat_sys_mount /* mount */
436 .quad sys_oldumount /* old_umount */
439 .quad compat_sys_stime /* stime */ /* 25 */
440 .quad compat_sys_ptrace /* ptrace */
442 .quad sys_fstat /* (old)fstat */
444 .quad compat_sys_utime /* 30 */
445 .quad quiet_ni_syscall /* old stty syscall holder */
446 .quad quiet_ni_syscall /* old gtty syscall holder */
449 .quad quiet_ni_syscall /* 35 */ /* old ftime syscall holder */
454 .quad sys_rmdir /* 40 */
457 .quad compat_sys_times
458 .quad quiet_ni_syscall /* old prof syscall holder */
459 .quad sys_brk /* 45 */
464 .quad sys_getegid16 /* 50 */
466 .quad sys_umount /* new_umount */
467 .quad quiet_ni_syscall /* old lock syscall holder */
468 .quad compat_sys_ioctl
469 .quad compat_sys_fcntl64 /* 55 */
470 .quad quiet_ni_syscall /* old mpx syscall holder */
472 .quad quiet_ni_syscall /* old ulimit syscall holder */
474 .quad sys_umask /* 60 */
479 .quad sys_getpgrp /* 65 */
481 .quad sys32_sigaction
484 .quad sys_setreuid16 /* 70 */
486 .quad sys32_sigsuspend
487 .quad compat_sys_sigpending
488 .quad sys_sethostname
489 .quad compat_sys_setrlimit /* 75 */
490 .quad compat_sys_old_getrlimit /* old_getrlimit */
491 .quad compat_sys_getrusage
492 .quad sys32_gettimeofday
493 .quad sys32_settimeofday
494 .quad sys_getgroups16 /* 80 */
495 .quad sys_setgroups16
496 .quad sys32_old_select
499 .quad sys_readlink /* 85 */
503 .quad compat_sys_old_readdir
504 .quad sys32_mmap /* 90 */
509 .quad sys_fchown16 /* 95 */
510 .quad sys_getpriority
511 .quad sys_setpriority
512 .quad quiet_ni_syscall /* old profil syscall holder */
513 .quad compat_sys_statfs
514 .quad compat_sys_fstatfs /* 100 */
516 .quad compat_sys_socketcall
518 .quad compat_sys_setitimer
519 .quad compat_sys_getitimer /* 105 */
520 .quad compat_sys_newstat
521 .quad compat_sys_newlstat
522 .quad compat_sys_newfstat
524 .quad stub32_iopl /* 110 */
526 .quad quiet_ni_syscall /* old "idle" system call */
527 .quad sys32_vm86_warning /* vm86old */
528 .quad compat_sys_wait4
529 .quad sys_swapoff /* 115 */
530 .quad compat_sys_sysinfo
533 .quad stub32_sigreturn
534 .quad stub32_clone /* 120 */
535 .quad sys_setdomainname
538 .quad compat_sys_adjtimex
539 .quad sys32_mprotect /* 125 */
540 .quad compat_sys_sigprocmask
541 .quad quiet_ni_syscall /* create_module */
542 .quad sys_init_module
543 .quad sys_delete_module
544 .quad quiet_ni_syscall /* 130 get_kernel_syms */
548 .quad quiet_ni_syscall /* bdflush */
549 .quad sys_sysfs /* 135 */
550 .quad sys_personality
551 .quad quiet_ni_syscall /* for afs_syscall */
554 .quad sys_llseek /* 140 */
555 .quad compat_sys_getdents
556 .quad compat_sys_select
559 .quad compat_sys_readv /* 145 */
560 .quad compat_sys_writev
563 .quad sys32_sysctl /* sysctl */
564 .quad sys_mlock /* 150 */
568 .quad sys_sched_setparam
569 .quad sys_sched_getparam /* 155 */
570 .quad sys_sched_setscheduler
571 .quad sys_sched_getscheduler
572 .quad sys_sched_yield
573 .quad sys_sched_get_priority_max
574 .quad sys_sched_get_priority_min /* 160 */
575 .quad sys32_sched_rr_get_interval
576 .quad compat_sys_nanosleep
578 .quad sys_setresuid16
579 .quad sys_getresuid16 /* 165 */
580 .quad sys32_vm86_warning /* vm86 */
581 .quad quiet_ni_syscall /* query_module */
583 .quad compat_sys_nfsservctl
584 .quad sys_setresgid16 /* 170 */
585 .quad sys_getresgid16
587 .quad stub32_rt_sigreturn
588 .quad sys32_rt_sigaction
589 .quad sys32_rt_sigprocmask /* 175 */
590 .quad sys32_rt_sigpending
591 .quad compat_sys_rt_sigtimedwait
592 .quad sys32_rt_sigqueueinfo
593 .quad sys_rt_sigsuspend
594 .quad sys32_pread /* 180 */
600 .quad stub32_sigaltstack
602 .quad quiet_ni_syscall /* streams1 */
603 .quad quiet_ni_syscall /* streams2 */
604 .quad stub32_vfork /* 190 */
605 .quad compat_sys_getrlimit
607 .quad sys32_truncate64
608 .quad sys32_ftruncate64
609 .quad sys32_stat64 /* 195 */
614 .quad sys_getgid /* 200 */
619 .quad sys_getgroups /* 205 */
624 .quad sys_setresgid /* 210 */
629 .quad sys_setfsuid /* 215 */
634 .quad compat_sys_getdents64 /* 220 getdents64 */
635 .quad compat_sys_fcntl64
636 .quad quiet_ni_syscall /* tux */
637 .quad quiet_ni_syscall /* security */
639 .quad sys32_readahead /* 225 */
644 .quad sys_lgetxattr /* 230 */
649 .quad sys_removexattr /* 235 */
650 .quad sys_lremovexattr
651 .quad sys_fremovexattr
654 .quad compat_sys_futex /* 240 */
655 .quad compat_sys_sched_setaffinity
656 .quad compat_sys_sched_getaffinity
657 .quad sys_set_thread_area
658 .quad sys_get_thread_area
659 .quad compat_sys_io_setup /* 245 */
661 .quad compat_sys_io_getevents
662 .quad compat_sys_io_submit
664 .quad sys32_fadvise64 /* 250 */
665 .quad quiet_ni_syscall /* free_huge_pages */
667 .quad sys32_lookup_dcookie
668 .quad sys_epoll_create
669 .quad sys_epoll_ctl /* 255 */
671 .quad sys_remap_file_pages
672 .quad sys_set_tid_address
673 .quad compat_sys_timer_create
674 .quad compat_sys_timer_settime /* 260 */
675 .quad compat_sys_timer_gettime
676 .quad sys_timer_getoverrun
677 .quad sys_timer_delete
678 .quad compat_sys_clock_settime
679 .quad compat_sys_clock_gettime /* 265 */
680 .quad compat_sys_clock_getres
681 .quad compat_sys_clock_nanosleep
682 .quad compat_sys_statfs64
683 .quad compat_sys_fstatfs64
684 .quad sys_tgkill /* 270 */
685 .quad compat_sys_utimes
686 .quad sys32_fadvise64_64
687 .quad quiet_ni_syscall /* sys_vserver */
689 .quad compat_sys_get_mempolicy /* 275 */
690 .quad sys_set_mempolicy
691 .quad compat_sys_mq_open
693 .quad compat_sys_mq_timedsend
694 .quad compat_sys_mq_timedreceive /* 280 */
695 .quad compat_sys_mq_notify
696 .quad compat_sys_mq_getsetattr
697 .quad compat_sys_kexec_load /* reserved for kexec */
698 .quad compat_sys_waitid
699 .quad quiet_ni_syscall /* 285: sys_altroot */
701 .quad sys_request_key
704 .quad sys_ioprio_get /* 290 */
705 .quad sys_inotify_init
706 .quad sys_inotify_add_watch
707 .quad sys_inotify_rm_watch
708 .quad sys_migrate_pages
709 .quad compat_sys_openat /* 295 */
713 .quad compat_sys_futimesat
714 .quad sys32_fstatat /* 300 */
719 .quad sys_readlinkat /* 305 */
722 .quad compat_sys_pselect6
723 .quad compat_sys_ppoll
724 .quad sys_unshare /* 310 */
725 .quad compat_sys_set_robust_list
726 .quad compat_sys_get_robust_list
728 .quad sys32_sync_file_range
729 .quad sys_tee /* 315 */
730 .quad compat_sys_vmsplice
731 .quad compat_sys_move_pages
733 .quad sys_epoll_pwait
734 .quad compat_sys_utimensat /* 320 */
735 .quad compat_sys_signalfd
736 .quad sys_timerfd_create
738 .quad sys32_fallocate
739 .quad compat_sys_timerfd_settime /* 325 */
740 .quad compat_sys_timerfd_gettime