diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/i386/kernel/entry.S |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/i386/kernel/entry.S')
-rw-r--r-- | arch/i386/kernel/entry.S | 950 |
1 files changed, 950 insertions, 0 deletions
diff --git a/arch/i386/kernel/entry.S b/arch/i386/kernel/entry.S new file mode 100644 index 000000000000..1e45ff292bc9 --- /dev/null +++ b/arch/i386/kernel/entry.S | |||
@@ -0,0 +1,950 @@ | |||
1 | /* | ||
2 | * linux/arch/i386/entry.S | ||
3 | * | ||
4 | * Copyright (C) 1991, 1992 Linus Torvalds | ||
5 | */ | ||
6 | |||
7 | /* | ||
8 | * entry.S contains the system-call and fault low-level handling routines. | ||
9 | * This also contains the timer-interrupt handler, as well as all interrupts | ||
10 | * and faults that can result in a task-switch. | ||
11 | * | ||
12 | * NOTE: This code handles signal-recognition, which happens every time | ||
13 | * after a timer-interrupt and after each system call. | ||
14 | * | ||
15 | * I changed all the .align's to 4 (16 byte alignment), as that's faster | ||
16 | * on a 486. | ||
17 | * | ||
18 | * Stack layout in 'ret_from_system_call': | ||
19 | * ptrace needs to have all regs on the stack. | ||
20 | * if the order here is changed, it needs to be | ||
21 | * updated in fork.c:copy_process, signal.c:do_signal, | ||
22 | * ptrace.c and ptrace.h | ||
23 | * | ||
24 | * 0(%esp) - %ebx | ||
25 | * 4(%esp) - %ecx | ||
26 | * 8(%esp) - %edx | ||
27 | * C(%esp) - %esi | ||
28 | * 10(%esp) - %edi | ||
29 | * 14(%esp) - %ebp | ||
30 | * 18(%esp) - %eax | ||
31 | * 1C(%esp) - %ds | ||
32 | * 20(%esp) - %es | ||
33 | * 24(%esp) - orig_eax | ||
34 | * 28(%esp) - %eip | ||
35 | * 2C(%esp) - %cs | ||
36 | * 30(%esp) - %eflags | ||
37 | * 34(%esp) - %oldesp | ||
38 | * 38(%esp) - %oldss | ||
39 | * | ||
40 | * "current" is in register %ebx during any slow entries. | ||
41 | */ | ||
42 | |||
43 | #include <linux/config.h> | ||
44 | #include <linux/linkage.h> | ||
45 | #include <asm/thread_info.h> | ||
46 | #include <asm/errno.h> | ||
47 | #include <asm/segment.h> | ||
48 | #include <asm/smp.h> | ||
49 | #include <asm/page.h> | ||
50 | #include <asm/desc.h> | ||
51 | #include "irq_vectors.h" | ||
52 | |||
53 | #define nr_syscalls ((syscall_table_size)/4) | ||
54 | |||
55 | EBX = 0x00 | ||
56 | ECX = 0x04 | ||
57 | EDX = 0x08 | ||
58 | ESI = 0x0C | ||
59 | EDI = 0x10 | ||
60 | EBP = 0x14 | ||
61 | EAX = 0x18 | ||
62 | DS = 0x1C | ||
63 | ES = 0x20 | ||
64 | ORIG_EAX = 0x24 | ||
65 | EIP = 0x28 | ||
66 | CS = 0x2C | ||
67 | EFLAGS = 0x30 | ||
68 | OLDESP = 0x34 | ||
69 | OLDSS = 0x38 | ||
70 | |||
71 | CF_MASK = 0x00000001 | ||
72 | TF_MASK = 0x00000100 | ||
73 | IF_MASK = 0x00000200 | ||
74 | DF_MASK = 0x00000400 | ||
75 | NT_MASK = 0x00004000 | ||
76 | VM_MASK = 0x00020000 | ||
77 | |||
78 | #ifdef CONFIG_PREEMPT | ||
79 | #define preempt_stop cli | ||
80 | #else | ||
81 | #define preempt_stop | ||
82 | #define resume_kernel restore_nocheck | ||
83 | #endif | ||
84 | |||
85 | #define SAVE_ALL \ | ||
86 | cld; \ | ||
87 | pushl %es; \ | ||
88 | pushl %ds; \ | ||
89 | pushl %eax; \ | ||
90 | pushl %ebp; \ | ||
91 | pushl %edi; \ | ||
92 | pushl %esi; \ | ||
93 | pushl %edx; \ | ||
94 | pushl %ecx; \ | ||
95 | pushl %ebx; \ | ||
96 | movl $(__USER_DS), %edx; \ | ||
97 | movl %edx, %ds; \ | ||
98 | movl %edx, %es; | ||
99 | |||
100 | #define RESTORE_INT_REGS \ | ||
101 | popl %ebx; \ | ||
102 | popl %ecx; \ | ||
103 | popl %edx; \ | ||
104 | popl %esi; \ | ||
105 | popl %edi; \ | ||
106 | popl %ebp; \ | ||
107 | popl %eax | ||
108 | |||
109 | #define RESTORE_REGS \ | ||
110 | RESTORE_INT_REGS; \ | ||
111 | 1: popl %ds; \ | ||
112 | 2: popl %es; \ | ||
113 | .section .fixup,"ax"; \ | ||
114 | 3: movl $0,(%esp); \ | ||
115 | jmp 1b; \ | ||
116 | 4: movl $0,(%esp); \ | ||
117 | jmp 2b; \ | ||
118 | .previous; \ | ||
119 | .section __ex_table,"a";\ | ||
120 | .align 4; \ | ||
121 | .long 1b,3b; \ | ||
122 | .long 2b,4b; \ | ||
123 | .previous | ||
124 | |||
125 | |||
126 | ENTRY(ret_from_fork) | ||
127 | pushl %eax | ||
128 | call schedule_tail | ||
129 | GET_THREAD_INFO(%ebp) | ||
130 | popl %eax | ||
131 | jmp syscall_exit | ||
132 | |||
133 | /* | ||
134 | * Return to user mode is not as complex as all this looks, | ||
135 | * but we want the default path for a system call return to | ||
136 | * go as quickly as possible which is why some of this is | ||
137 | * less clear than it otherwise should be. | ||
138 | */ | ||
139 | |||
140 | # userspace resumption stub bypassing syscall exit tracing | ||
141 | ALIGN | ||
142 | ret_from_exception: | ||
143 | preempt_stop | ||
144 | ret_from_intr: | ||
145 | GET_THREAD_INFO(%ebp) | ||
146 | movl EFLAGS(%esp), %eax # mix EFLAGS and CS | ||
147 | movb CS(%esp), %al | ||
148 | testl $(VM_MASK | 3), %eax | ||
149 | jz resume_kernel | ||
150 | ENTRY(resume_userspace) | ||
151 | cli # make sure we don't miss an interrupt | ||
152 | # setting need_resched or sigpending | ||
153 | # between sampling and the iret | ||
154 | movl TI_flags(%ebp), %ecx | ||
155 | andl $_TIF_WORK_MASK, %ecx # is there any work to be done on | ||
156 | # int/exception return? | ||
157 | jne work_pending | ||
158 | jmp restore_all | ||
159 | |||
160 | #ifdef CONFIG_PREEMPT | ||
161 | ENTRY(resume_kernel) | ||
162 | cli | ||
163 | cmpl $0,TI_preempt_count(%ebp) # non-zero preempt_count ? | ||
164 | jnz restore_nocheck | ||
165 | need_resched: | ||
166 | movl TI_flags(%ebp), %ecx # need_resched set ? | ||
167 | testb $_TIF_NEED_RESCHED, %cl | ||
168 | jz restore_all | ||
169 | testl $IF_MASK,EFLAGS(%esp) # interrupts off (exception path) ? | ||
170 | jz restore_all | ||
171 | call preempt_schedule_irq | ||
172 | jmp need_resched | ||
173 | #endif | ||
174 | |||
175 | /* SYSENTER_RETURN points to after the "sysenter" instruction in | ||
176 | the vsyscall page. See vsyscall-sysentry.S, which defines the symbol. */ | ||
177 | |||
178 | # sysenter call handler stub | ||
179 | ENTRY(sysenter_entry) | ||
180 | movl TSS_sysenter_esp0(%esp),%esp | ||
181 | sysenter_past_esp: | ||
182 | sti | ||
183 | pushl $(__USER_DS) | ||
184 | pushl %ebp | ||
185 | pushfl | ||
186 | pushl $(__USER_CS) | ||
187 | pushl $SYSENTER_RETURN | ||
188 | |||
189 | /* | ||
190 | * Load the potential sixth argument from user stack. | ||
191 | * Careful about security. | ||
192 | */ | ||
193 | cmpl $__PAGE_OFFSET-3,%ebp | ||
194 | jae syscall_fault | ||
195 | 1: movl (%ebp),%ebp | ||
196 | .section __ex_table,"a" | ||
197 | .align 4 | ||
198 | .long 1b,syscall_fault | ||
199 | .previous | ||
200 | |||
201 | pushl %eax | ||
202 | SAVE_ALL | ||
203 | GET_THREAD_INFO(%ebp) | ||
204 | |||
205 | /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */ | ||
206 | testw $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),TI_flags(%ebp) | ||
207 | jnz syscall_trace_entry | ||
208 | cmpl $(nr_syscalls), %eax | ||
209 | jae syscall_badsys | ||
210 | call *sys_call_table(,%eax,4) | ||
211 | movl %eax,EAX(%esp) | ||
212 | cli | ||
213 | movl TI_flags(%ebp), %ecx | ||
214 | testw $_TIF_ALLWORK_MASK, %cx | ||
215 | jne syscall_exit_work | ||
216 | /* if something modifies registers it must also disable sysexit */ | ||
217 | movl EIP(%esp), %edx | ||
218 | movl OLDESP(%esp), %ecx | ||
219 | xorl %ebp,%ebp | ||
220 | sti | ||
221 | sysexit | ||
222 | |||
223 | |||
224 | # system call handler stub | ||
225 | ENTRY(system_call) | ||
226 | pushl %eax # save orig_eax | ||
227 | SAVE_ALL | ||
228 | GET_THREAD_INFO(%ebp) | ||
229 | # system call tracing in operation | ||
230 | /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */ | ||
231 | testw $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),TI_flags(%ebp) | ||
232 | jnz syscall_trace_entry | ||
233 | cmpl $(nr_syscalls), %eax | ||
234 | jae syscall_badsys | ||
235 | syscall_call: | ||
236 | call *sys_call_table(,%eax,4) | ||
237 | movl %eax,EAX(%esp) # store the return value | ||
238 | syscall_exit: | ||
239 | cli # make sure we don't miss an interrupt | ||
240 | # setting need_resched or sigpending | ||
241 | # between sampling and the iret | ||
242 | movl TI_flags(%ebp), %ecx | ||
243 | testw $_TIF_ALLWORK_MASK, %cx # current->work | ||
244 | jne syscall_exit_work | ||
245 | |||
246 | restore_all: | ||
247 | movl EFLAGS(%esp), %eax # mix EFLAGS, SS and CS | ||
248 | movb OLDSS(%esp), %ah | ||
249 | movb CS(%esp), %al | ||
250 | andl $(VM_MASK | (4 << 8) | 3), %eax | ||
251 | cmpl $((4 << 8) | 3), %eax | ||
252 | je ldt_ss # returning to user-space with LDT SS | ||
253 | restore_nocheck: | ||
254 | RESTORE_REGS | ||
255 | addl $4, %esp | ||
256 | 1: iret | ||
257 | .section .fixup,"ax" | ||
258 | iret_exc: | ||
259 | sti | ||
260 | movl $__USER_DS, %edx | ||
261 | movl %edx, %ds | ||
262 | movl %edx, %es | ||
263 | movl $11,%eax | ||
264 | call do_exit | ||
265 | .previous | ||
266 | .section __ex_table,"a" | ||
267 | .align 4 | ||
268 | .long 1b,iret_exc | ||
269 | .previous | ||
270 | |||
271 | ldt_ss: | ||
272 | larl OLDSS(%esp), %eax | ||
273 | jnz restore_nocheck | ||
274 | testl $0x00400000, %eax # returning to 32bit stack? | ||
275 | jnz restore_nocheck # allright, normal return | ||
276 | /* If returning to userspace with 16bit stack, | ||
277 | * try to fix the higher word of ESP, as the CPU | ||
278 | * won't restore it. | ||
279 | * This is an "official" bug of all the x86-compatible | ||
280 | * CPUs, which we can try to work around to make | ||
281 | * dosemu and wine happy. */ | ||
282 | subl $8, %esp # reserve space for switch16 pointer | ||
283 | cli | ||
284 | movl %esp, %eax | ||
285 | /* Set up the 16bit stack frame with switch32 pointer on top, | ||
286 | * and a switch16 pointer on top of the current frame. */ | ||
287 | call setup_x86_bogus_stack | ||
288 | RESTORE_REGS | ||
289 | lss 20+4(%esp), %esp # switch to 16bit stack | ||
290 | 1: iret | ||
291 | .section __ex_table,"a" | ||
292 | .align 4 | ||
293 | .long 1b,iret_exc | ||
294 | .previous | ||
295 | |||
296 | # perform work that needs to be done immediately before resumption | ||
297 | ALIGN | ||
298 | work_pending: | ||
299 | testb $_TIF_NEED_RESCHED, %cl | ||
300 | jz work_notifysig | ||
301 | work_resched: | ||
302 | call schedule | ||
303 | cli # make sure we don't miss an interrupt | ||
304 | # setting need_resched or sigpending | ||
305 | # between sampling and the iret | ||
306 | movl TI_flags(%ebp), %ecx | ||
307 | andl $_TIF_WORK_MASK, %ecx # is there any work to be done other | ||
308 | # than syscall tracing? | ||
309 | jz restore_all | ||
310 | testb $_TIF_NEED_RESCHED, %cl | ||
311 | jnz work_resched | ||
312 | |||
313 | work_notifysig: # deal with pending signals and | ||
314 | # notify-resume requests | ||
315 | testl $VM_MASK, EFLAGS(%esp) | ||
316 | movl %esp, %eax | ||
317 | jne work_notifysig_v86 # returning to kernel-space or | ||
318 | # vm86-space | ||
319 | xorl %edx, %edx | ||
320 | call do_notify_resume | ||
321 | jmp restore_all | ||
322 | |||
323 | ALIGN | ||
324 | work_notifysig_v86: | ||
325 | pushl %ecx # save ti_flags for do_notify_resume | ||
326 | call save_v86_state # %eax contains pt_regs pointer | ||
327 | popl %ecx | ||
328 | movl %eax, %esp | ||
329 | xorl %edx, %edx | ||
330 | call do_notify_resume | ||
331 | jmp restore_all | ||
332 | |||
333 | # perform syscall exit tracing | ||
334 | ALIGN | ||
335 | syscall_trace_entry: | ||
336 | movl $-ENOSYS,EAX(%esp) | ||
337 | movl %esp, %eax | ||
338 | xorl %edx,%edx | ||
339 | call do_syscall_trace | ||
340 | movl ORIG_EAX(%esp), %eax | ||
341 | cmpl $(nr_syscalls), %eax | ||
342 | jnae syscall_call | ||
343 | jmp syscall_exit | ||
344 | |||
345 | # perform syscall exit tracing | ||
346 | ALIGN | ||
347 | syscall_exit_work: | ||
348 | testb $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP), %cl | ||
349 | jz work_pending | ||
350 | sti # could let do_syscall_trace() call | ||
351 | # schedule() instead | ||
352 | movl %esp, %eax | ||
353 | movl $1, %edx | ||
354 | call do_syscall_trace | ||
355 | jmp resume_userspace | ||
356 | |||
357 | ALIGN | ||
358 | syscall_fault: | ||
359 | pushl %eax # save orig_eax | ||
360 | SAVE_ALL | ||
361 | GET_THREAD_INFO(%ebp) | ||
362 | movl $-EFAULT,EAX(%esp) | ||
363 | jmp resume_userspace | ||
364 | |||
365 | ALIGN | ||
366 | syscall_badsys: | ||
367 | movl $-ENOSYS,EAX(%esp) | ||
368 | jmp resume_userspace | ||
369 | |||
370 | #define FIXUP_ESPFIX_STACK \ | ||
371 | movl %esp, %eax; \ | ||
372 | /* switch to 32bit stack using the pointer on top of 16bit stack */ \ | ||
373 | lss %ss:CPU_16BIT_STACK_SIZE-8, %esp; \ | ||
374 | /* copy data from 16bit stack to 32bit stack */ \ | ||
375 | call fixup_x86_bogus_stack; \ | ||
376 | /* put ESP to the proper location */ \ | ||
377 | movl %eax, %esp; | ||
378 | #define UNWIND_ESPFIX_STACK \ | ||
379 | pushl %eax; \ | ||
380 | movl %ss, %eax; \ | ||
381 | /* see if on 16bit stack */ \ | ||
382 | cmpw $__ESPFIX_SS, %ax; \ | ||
383 | jne 28f; \ | ||
384 | movl $__KERNEL_DS, %edx; \ | ||
385 | movl %edx, %ds; \ | ||
386 | movl %edx, %es; \ | ||
387 | /* switch to 32bit stack */ \ | ||
388 | FIXUP_ESPFIX_STACK \ | ||
389 | 28: popl %eax; | ||
390 | |||
391 | /* | ||
392 | * Build the entry stubs and pointer table with | ||
393 | * some assembler magic. | ||
394 | */ | ||
395 | .data | ||
396 | ENTRY(interrupt) | ||
397 | .text | ||
398 | |||
399 | vector=0 | ||
400 | ENTRY(irq_entries_start) | ||
401 | .rept NR_IRQS | ||
402 | ALIGN | ||
403 | 1: pushl $vector-256 | ||
404 | jmp common_interrupt | ||
405 | .data | ||
406 | .long 1b | ||
407 | .text | ||
408 | vector=vector+1 | ||
409 | .endr | ||
410 | |||
411 | ALIGN | ||
412 | common_interrupt: | ||
413 | SAVE_ALL | ||
414 | movl %esp,%eax | ||
415 | call do_IRQ | ||
416 | jmp ret_from_intr | ||
417 | |||
418 | #define BUILD_INTERRUPT(name, nr) \ | ||
419 | ENTRY(name) \ | ||
420 | pushl $nr-256; \ | ||
421 | SAVE_ALL \ | ||
422 | movl %esp,%eax; \ | ||
423 | call smp_/**/name; \ | ||
424 | jmp ret_from_intr; | ||
425 | |||
426 | /* The include is where all of the SMP etc. interrupts come from */ | ||
427 | #include "entry_arch.h" | ||
428 | |||
429 | ENTRY(divide_error) | ||
430 | pushl $0 # no error code | ||
431 | pushl $do_divide_error | ||
432 | ALIGN | ||
433 | error_code: | ||
434 | pushl %ds | ||
435 | pushl %eax | ||
436 | xorl %eax, %eax | ||
437 | pushl %ebp | ||
438 | pushl %edi | ||
439 | pushl %esi | ||
440 | pushl %edx | ||
441 | decl %eax # eax = -1 | ||
442 | pushl %ecx | ||
443 | pushl %ebx | ||
444 | cld | ||
445 | pushl %es | ||
446 | UNWIND_ESPFIX_STACK | ||
447 | popl %ecx | ||
448 | movl ES(%esp), %edi # get the function address | ||
449 | movl ORIG_EAX(%esp), %edx # get the error code | ||
450 | movl %eax, ORIG_EAX(%esp) | ||
451 | movl %ecx, ES(%esp) | ||
452 | movl $(__USER_DS), %ecx | ||
453 | movl %ecx, %ds | ||
454 | movl %ecx, %es | ||
455 | movl %esp,%eax # pt_regs pointer | ||
456 | call *%edi | ||
457 | jmp ret_from_exception | ||
458 | |||
459 | ENTRY(coprocessor_error) | ||
460 | pushl $0 | ||
461 | pushl $do_coprocessor_error | ||
462 | jmp error_code | ||
463 | |||
464 | ENTRY(simd_coprocessor_error) | ||
465 | pushl $0 | ||
466 | pushl $do_simd_coprocessor_error | ||
467 | jmp error_code | ||
468 | |||
469 | ENTRY(device_not_available) | ||
470 | pushl $-1 # mark this as an int | ||
471 | SAVE_ALL | ||
472 | movl %cr0, %eax | ||
473 | testl $0x4, %eax # EM (math emulation bit) | ||
474 | jne device_not_available_emulate | ||
475 | preempt_stop | ||
476 | call math_state_restore | ||
477 | jmp ret_from_exception | ||
478 | device_not_available_emulate: | ||
479 | pushl $0 # temporary storage for ORIG_EIP | ||
480 | call math_emulate | ||
481 | addl $4, %esp | ||
482 | jmp ret_from_exception | ||
483 | |||
484 | /* | ||
485 | * Debug traps and NMI can happen at the one SYSENTER instruction | ||
486 | * that sets up the real kernel stack. Check here, since we can't | ||
487 | * allow the wrong stack to be used. | ||
488 | * | ||
489 | * "TSS_sysenter_esp0+12" is because the NMI/debug handler will have | ||
490 | * already pushed 3 words if it hits on the sysenter instruction: | ||
491 | * eflags, cs and eip. | ||
492 | * | ||
493 | * We just load the right stack, and push the three (known) values | ||
494 | * by hand onto the new stack - while updating the return eip past | ||
495 | * the instruction that would have done it for sysenter. | ||
496 | */ | ||
497 | #define FIX_STACK(offset, ok, label) \ | ||
498 | cmpw $__KERNEL_CS,4(%esp); \ | ||
499 | jne ok; \ | ||
500 | label: \ | ||
501 | movl TSS_sysenter_esp0+offset(%esp),%esp; \ | ||
502 | pushfl; \ | ||
503 | pushl $__KERNEL_CS; \ | ||
504 | pushl $sysenter_past_esp | ||
505 | |||
506 | ENTRY(debug) | ||
507 | cmpl $sysenter_entry,(%esp) | ||
508 | jne debug_stack_correct | ||
509 | FIX_STACK(12, debug_stack_correct, debug_esp_fix_insn) | ||
510 | debug_stack_correct: | ||
511 | pushl $-1 # mark this as an int | ||
512 | SAVE_ALL | ||
513 | xorl %edx,%edx # error code 0 | ||
514 | movl %esp,%eax # pt_regs pointer | ||
515 | call do_debug | ||
516 | testl %eax,%eax | ||
517 | jnz restore_all | ||
518 | jmp ret_from_exception | ||
519 | |||
520 | /* | ||
521 | * NMI is doubly nasty. It can happen _while_ we're handling | ||
522 | * a debug fault, and the debug fault hasn't yet been able to | ||
523 | * clear up the stack. So we first check whether we got an | ||
524 | * NMI on the sysenter entry path, but after that we need to | ||
525 | * check whether we got an NMI on the debug path where the debug | ||
526 | * fault happened on the sysenter path. | ||
527 | */ | ||
528 | ENTRY(nmi) | ||
529 | pushl %eax | ||
530 | movl %ss, %eax | ||
531 | cmpw $__ESPFIX_SS, %ax | ||
532 | popl %eax | ||
533 | je nmi_16bit_stack | ||
534 | cmpl $sysenter_entry,(%esp) | ||
535 | je nmi_stack_fixup | ||
536 | pushl %eax | ||
537 | movl %esp,%eax | ||
538 | /* Do not access memory above the end of our stack page, | ||
539 | * it might not exist. | ||
540 | */ | ||
541 | andl $(THREAD_SIZE-1),%eax | ||
542 | cmpl $(THREAD_SIZE-20),%eax | ||
543 | popl %eax | ||
544 | jae nmi_stack_correct | ||
545 | cmpl $sysenter_entry,12(%esp) | ||
546 | je nmi_debug_stack_check | ||
547 | nmi_stack_correct: | ||
548 | pushl %eax | ||
549 | SAVE_ALL | ||
550 | xorl %edx,%edx # zero error code | ||
551 | movl %esp,%eax # pt_regs pointer | ||
552 | call do_nmi | ||
553 | jmp restore_all | ||
554 | |||
555 | nmi_stack_fixup: | ||
556 | FIX_STACK(12,nmi_stack_correct, 1) | ||
557 | jmp nmi_stack_correct | ||
558 | nmi_debug_stack_check: | ||
559 | cmpw $__KERNEL_CS,16(%esp) | ||
560 | jne nmi_stack_correct | ||
561 | cmpl $debug - 1,(%esp) | ||
562 | jle nmi_stack_correct | ||
563 | cmpl $debug_esp_fix_insn,(%esp) | ||
564 | jle nmi_debug_stack_fixup | ||
565 | nmi_debug_stack_fixup: | ||
566 | FIX_STACK(24,nmi_stack_correct, 1) | ||
567 | jmp nmi_stack_correct | ||
568 | |||
569 | nmi_16bit_stack: | ||
570 | /* create the pointer to lss back */ | ||
571 | pushl %ss | ||
572 | pushl %esp | ||
573 | movzwl %sp, %esp | ||
574 | addw $4, (%esp) | ||
575 | /* copy the iret frame of 12 bytes */ | ||
576 | .rept 3 | ||
577 | pushl 16(%esp) | ||
578 | .endr | ||
579 | pushl %eax | ||
580 | SAVE_ALL | ||
581 | FIXUP_ESPFIX_STACK # %eax == %esp | ||
582 | xorl %edx,%edx # zero error code | ||
583 | call do_nmi | ||
584 | RESTORE_REGS | ||
585 | lss 12+4(%esp), %esp # back to 16bit stack | ||
586 | 1: iret | ||
587 | .section __ex_table,"a" | ||
588 | .align 4 | ||
589 | .long 1b,iret_exc | ||
590 | .previous | ||
591 | |||
592 | ENTRY(int3) | ||
593 | pushl $-1 # mark this as an int | ||
594 | SAVE_ALL | ||
595 | xorl %edx,%edx # zero error code | ||
596 | movl %esp,%eax # pt_regs pointer | ||
597 | call do_int3 | ||
598 | testl %eax,%eax | ||
599 | jnz restore_all | ||
600 | jmp ret_from_exception | ||
601 | |||
602 | ENTRY(overflow) | ||
603 | pushl $0 | ||
604 | pushl $do_overflow | ||
605 | jmp error_code | ||
606 | |||
607 | ENTRY(bounds) | ||
608 | pushl $0 | ||
609 | pushl $do_bounds | ||
610 | jmp error_code | ||
611 | |||
612 | ENTRY(invalid_op) | ||
613 | pushl $0 | ||
614 | pushl $do_invalid_op | ||
615 | jmp error_code | ||
616 | |||
617 | ENTRY(coprocessor_segment_overrun) | ||
618 | pushl $0 | ||
619 | pushl $do_coprocessor_segment_overrun | ||
620 | jmp error_code | ||
621 | |||
622 | ENTRY(invalid_TSS) | ||
623 | pushl $do_invalid_TSS | ||
624 | jmp error_code | ||
625 | |||
626 | ENTRY(segment_not_present) | ||
627 | pushl $do_segment_not_present | ||
628 | jmp error_code | ||
629 | |||
630 | ENTRY(stack_segment) | ||
631 | pushl $do_stack_segment | ||
632 | jmp error_code | ||
633 | |||
634 | ENTRY(general_protection) | ||
635 | pushl $do_general_protection | ||
636 | jmp error_code | ||
637 | |||
638 | ENTRY(alignment_check) | ||
639 | pushl $do_alignment_check | ||
640 | jmp error_code | ||
641 | |||
642 | ENTRY(page_fault) | ||
643 | pushl $do_page_fault | ||
644 | jmp error_code | ||
645 | |||
646 | #ifdef CONFIG_X86_MCE | ||
647 | ENTRY(machine_check) | ||
648 | pushl $0 | ||
649 | pushl machine_check_vector | ||
650 | jmp error_code | ||
651 | #endif | ||
652 | |||
653 | ENTRY(spurious_interrupt_bug) | ||
654 | pushl $0 | ||
655 | pushl $do_spurious_interrupt_bug | ||
656 | jmp error_code | ||
657 | |||
658 | .data | ||
659 | ENTRY(sys_call_table) | ||
660 | .long sys_restart_syscall /* 0 - old "setup()" system call, used for restarting */ | ||
661 | .long sys_exit | ||
662 | .long sys_fork | ||
663 | .long sys_read | ||
664 | .long sys_write | ||
665 | .long sys_open /* 5 */ | ||
666 | .long sys_close | ||
667 | .long sys_waitpid | ||
668 | .long sys_creat | ||
669 | .long sys_link | ||
670 | .long sys_unlink /* 10 */ | ||
671 | .long sys_execve | ||
672 | .long sys_chdir | ||
673 | .long sys_time | ||
674 | .long sys_mknod | ||
675 | .long sys_chmod /* 15 */ | ||
676 | .long sys_lchown16 | ||
677 | .long sys_ni_syscall /* old break syscall holder */ | ||
678 | .long sys_stat | ||
679 | .long sys_lseek | ||
680 | .long sys_getpid /* 20 */ | ||
681 | .long sys_mount | ||
682 | .long sys_oldumount | ||
683 | .long sys_setuid16 | ||
684 | .long sys_getuid16 | ||
685 | .long sys_stime /* 25 */ | ||
686 | .long sys_ptrace | ||
687 | .long sys_alarm | ||
688 | .long sys_fstat | ||
689 | .long sys_pause | ||
690 | .long sys_utime /* 30 */ | ||
691 | .long sys_ni_syscall /* old stty syscall holder */ | ||
692 | .long sys_ni_syscall /* old gtty syscall holder */ | ||
693 | .long sys_access | ||
694 | .long sys_nice | ||
695 | .long sys_ni_syscall /* 35 - old ftime syscall holder */ | ||
696 | .long sys_sync | ||
697 | .long sys_kill | ||
698 | .long sys_rename | ||
699 | .long sys_mkdir | ||
700 | .long sys_rmdir /* 40 */ | ||
701 | .long sys_dup | ||
702 | .long sys_pipe | ||
703 | .long sys_times | ||
704 | .long sys_ni_syscall /* old prof syscall holder */ | ||
705 | .long sys_brk /* 45 */ | ||
706 | .long sys_setgid16 | ||
707 | .long sys_getgid16 | ||
708 | .long sys_signal | ||
709 | .long sys_geteuid16 | ||
710 | .long sys_getegid16 /* 50 */ | ||
711 | .long sys_acct | ||
712 | .long sys_umount /* recycled never used phys() */ | ||
713 | .long sys_ni_syscall /* old lock syscall holder */ | ||
714 | .long sys_ioctl | ||
715 | .long sys_fcntl /* 55 */ | ||
716 | .long sys_ni_syscall /* old mpx syscall holder */ | ||
717 | .long sys_setpgid | ||
718 | .long sys_ni_syscall /* old ulimit syscall holder */ | ||
719 | .long sys_olduname | ||
720 | .long sys_umask /* 60 */ | ||
721 | .long sys_chroot | ||
722 | .long sys_ustat | ||
723 | .long sys_dup2 | ||
724 | .long sys_getppid | ||
725 | .long sys_getpgrp /* 65 */ | ||
726 | .long sys_setsid | ||
727 | .long sys_sigaction | ||
728 | .long sys_sgetmask | ||
729 | .long sys_ssetmask | ||
730 | .long sys_setreuid16 /* 70 */ | ||
731 | .long sys_setregid16 | ||
732 | .long sys_sigsuspend | ||
733 | .long sys_sigpending | ||
734 | .long sys_sethostname | ||
735 | .long sys_setrlimit /* 75 */ | ||
736 | .long sys_old_getrlimit | ||
737 | .long sys_getrusage | ||
738 | .long sys_gettimeofday | ||
739 | .long sys_settimeofday | ||
740 | .long sys_getgroups16 /* 80 */ | ||
741 | .long sys_setgroups16 | ||
742 | .long old_select | ||
743 | .long sys_symlink | ||
744 | .long sys_lstat | ||
745 | .long sys_readlink /* 85 */ | ||
746 | .long sys_uselib | ||
747 | .long sys_swapon | ||
748 | .long sys_reboot | ||
749 | .long old_readdir | ||
750 | .long old_mmap /* 90 */ | ||
751 | .long sys_munmap | ||
752 | .long sys_truncate | ||
753 | .long sys_ftruncate | ||
754 | .long sys_fchmod | ||
755 | .long sys_fchown16 /* 95 */ | ||
756 | .long sys_getpriority | ||
757 | .long sys_setpriority | ||
758 | .long sys_ni_syscall /* old profil syscall holder */ | ||
759 | .long sys_statfs | ||
760 | .long sys_fstatfs /* 100 */ | ||
761 | .long sys_ioperm | ||
762 | .long sys_socketcall | ||
763 | .long sys_syslog | ||
764 | .long sys_setitimer | ||
765 | .long sys_getitimer /* 105 */ | ||
766 | .long sys_newstat | ||
767 | .long sys_newlstat | ||
768 | .long sys_newfstat | ||
769 | .long sys_uname | ||
770 | .long sys_iopl /* 110 */ | ||
771 | .long sys_vhangup | ||
772 | .long sys_ni_syscall /* old "idle" system call */ | ||
773 | .long sys_vm86old | ||
774 | .long sys_wait4 | ||
775 | .long sys_swapoff /* 115 */ | ||
776 | .long sys_sysinfo | ||
777 | .long sys_ipc | ||
778 | .long sys_fsync | ||
779 | .long sys_sigreturn | ||
780 | .long sys_clone /* 120 */ | ||
781 | .long sys_setdomainname | ||
782 | .long sys_newuname | ||
783 | .long sys_modify_ldt | ||
784 | .long sys_adjtimex | ||
785 | .long sys_mprotect /* 125 */ | ||
786 | .long sys_sigprocmask | ||
787 | .long sys_ni_syscall /* old "create_module" */ | ||
788 | .long sys_init_module | ||
789 | .long sys_delete_module | ||
790 | .long sys_ni_syscall /* 130: old "get_kernel_syms" */ | ||
791 | .long sys_quotactl | ||
792 | .long sys_getpgid | ||
793 | .long sys_fchdir | ||
794 | .long sys_bdflush | ||
795 | .long sys_sysfs /* 135 */ | ||
796 | .long sys_personality | ||
797 | .long sys_ni_syscall /* reserved for afs_syscall */ | ||
798 | .long sys_setfsuid16 | ||
799 | .long sys_setfsgid16 | ||
800 | .long sys_llseek /* 140 */ | ||
801 | .long sys_getdents | ||
802 | .long sys_select | ||
803 | .long sys_flock | ||
804 | .long sys_msync | ||
805 | .long sys_readv /* 145 */ | ||
806 | .long sys_writev | ||
807 | .long sys_getsid | ||
808 | .long sys_fdatasync | ||
809 | .long sys_sysctl | ||
810 | .long sys_mlock /* 150 */ | ||
811 | .long sys_munlock | ||
812 | .long sys_mlockall | ||
813 | .long sys_munlockall | ||
814 | .long sys_sched_setparam | ||
815 | .long sys_sched_getparam /* 155 */ | ||
816 | .long sys_sched_setscheduler | ||
817 | .long sys_sched_getscheduler | ||
818 | .long sys_sched_yield | ||
819 | .long sys_sched_get_priority_max | ||
820 | .long sys_sched_get_priority_min /* 160 */ | ||
821 | .long sys_sched_rr_get_interval | ||
822 | .long sys_nanosleep | ||
823 | .long sys_mremap | ||
824 | .long sys_setresuid16 | ||
825 | .long sys_getresuid16 /* 165 */ | ||
826 | .long sys_vm86 | ||
827 | .long sys_ni_syscall /* Old sys_query_module */ | ||
828 | .long sys_poll | ||
829 | .long sys_nfsservctl | ||
830 | .long sys_setresgid16 /* 170 */ | ||
831 | .long sys_getresgid16 | ||
832 | .long sys_prctl | ||
833 | .long sys_rt_sigreturn | ||
834 | .long sys_rt_sigaction | ||
835 | .long sys_rt_sigprocmask /* 175 */ | ||
836 | .long sys_rt_sigpending | ||
837 | .long sys_rt_sigtimedwait | ||
838 | .long sys_rt_sigqueueinfo | ||
839 | .long sys_rt_sigsuspend | ||
840 | .long sys_pread64 /* 180 */ | ||
841 | .long sys_pwrite64 | ||
842 | .long sys_chown16 | ||
843 | .long sys_getcwd | ||
844 | .long sys_capget | ||
845 | .long sys_capset /* 185 */ | ||
846 | .long sys_sigaltstack | ||
847 | .long sys_sendfile | ||
848 | .long sys_ni_syscall /* reserved for streams1 */ | ||
849 | .long sys_ni_syscall /* reserved for streams2 */ | ||
850 | .long sys_vfork /* 190 */ | ||
851 | .long sys_getrlimit | ||
852 | .long sys_mmap2 | ||
853 | .long sys_truncate64 | ||
854 | .long sys_ftruncate64 | ||
855 | .long sys_stat64 /* 195 */ | ||
856 | .long sys_lstat64 | ||
857 | .long sys_fstat64 | ||
858 | .long sys_lchown | ||
859 | .long sys_getuid | ||
860 | .long sys_getgid /* 200 */ | ||
861 | .long sys_geteuid | ||
862 | .long sys_getegid | ||
863 | .long sys_setreuid | ||
864 | .long sys_setregid | ||
865 | .long sys_getgroups /* 205 */ | ||
866 | .long sys_setgroups | ||
867 | .long sys_fchown | ||
868 | .long sys_setresuid | ||
869 | .long sys_getresuid | ||
870 | .long sys_setresgid /* 210 */ | ||
871 | .long sys_getresgid | ||
872 | .long sys_chown | ||
873 | .long sys_setuid | ||
874 | .long sys_setgid | ||
875 | .long sys_setfsuid /* 215 */ | ||
876 | .long sys_setfsgid | ||
877 | .long sys_pivot_root | ||
878 | .long sys_mincore | ||
879 | .long sys_madvise | ||
880 | .long sys_getdents64 /* 220 */ | ||
881 | .long sys_fcntl64 | ||
882 | .long sys_ni_syscall /* reserved for TUX */ | ||
883 | .long sys_ni_syscall | ||
884 | .long sys_gettid | ||
885 | .long sys_readahead /* 225 */ | ||
886 | .long sys_setxattr | ||
887 | .long sys_lsetxattr | ||
888 | .long sys_fsetxattr | ||
889 | .long sys_getxattr | ||
890 | .long sys_lgetxattr /* 230 */ | ||
891 | .long sys_fgetxattr | ||
892 | .long sys_listxattr | ||
893 | .long sys_llistxattr | ||
894 | .long sys_flistxattr | ||
895 | .long sys_removexattr /* 235 */ | ||
896 | .long sys_lremovexattr | ||
897 | .long sys_fremovexattr | ||
898 | .long sys_tkill | ||
899 | .long sys_sendfile64 | ||
900 | .long sys_futex /* 240 */ | ||
901 | .long sys_sched_setaffinity | ||
902 | .long sys_sched_getaffinity | ||
903 | .long sys_set_thread_area | ||
904 | .long sys_get_thread_area | ||
905 | .long sys_io_setup /* 245 */ | ||
906 | .long sys_io_destroy | ||
907 | .long sys_io_getevents | ||
908 | .long sys_io_submit | ||
909 | .long sys_io_cancel | ||
910 | .long sys_fadvise64 /* 250 */ | ||
911 | .long sys_ni_syscall | ||
912 | .long sys_exit_group | ||
913 | .long sys_lookup_dcookie | ||
914 | .long sys_epoll_create | ||
915 | .long sys_epoll_ctl /* 255 */ | ||
916 | .long sys_epoll_wait | ||
917 | .long sys_remap_file_pages | ||
918 | .long sys_set_tid_address | ||
919 | .long sys_timer_create | ||
920 | .long sys_timer_settime /* 260 */ | ||
921 | .long sys_timer_gettime | ||
922 | .long sys_timer_getoverrun | ||
923 | .long sys_timer_delete | ||
924 | .long sys_clock_settime | ||
925 | .long sys_clock_gettime /* 265 */ | ||
926 | .long sys_clock_getres | ||
927 | .long sys_clock_nanosleep | ||
928 | .long sys_statfs64 | ||
929 | .long sys_fstatfs64 | ||
930 | .long sys_tgkill /* 270 */ | ||
931 | .long sys_utimes | ||
932 | .long sys_fadvise64_64 | ||
933 | .long sys_ni_syscall /* sys_vserver */ | ||
934 | .long sys_mbind | ||
935 | .long sys_get_mempolicy | ||
936 | .long sys_set_mempolicy | ||
937 | .long sys_mq_open | ||
938 | .long sys_mq_unlink | ||
939 | .long sys_mq_timedsend | ||
940 | .long sys_mq_timedreceive /* 280 */ | ||
941 | .long sys_mq_notify | ||
942 | .long sys_mq_getsetattr | ||
943 | .long sys_ni_syscall /* reserved for kexec */ | ||
944 | .long sys_waitid | ||
945 | .long sys_ni_syscall /* 285 */ /* available */ | ||
946 | .long sys_add_key | ||
947 | .long sys_request_key | ||
948 | .long sys_keyctl | ||
949 | |||
950 | syscall_table_size=(.-sys_call_table) | ||