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authorH. Peter Anvin <hpa@zytor.com>2012-04-20 15:19:52 -0400
committerH. Peter Anvin <hpa@zytor.com>2012-04-20 16:51:39 -0400
commit9c6751280b6206e2a96f9600938003a29968e4fa (patch)
tree01867ca9f8aa5732c79b1dd586e01908d447c5ab /arch/x86/lib
parenta53a96e5413d3639ed75d202bbfe68aa0a56c091 (diff)
x86, extable: Remove open-coded exception table entries in arch/x86/lib/usercopy_32.c
Remove open-coded exception table entries in arch/x86/lib/usercopy_32.c, and replace them with _ASM_EXTABLE() macros; this will allow us to change the format and type of the exception table entries. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/CA%2B55aFyijf43qSu3N9nWHEBwaGbb7T2Oq9A=9EyR=Jtyqfq_cQ@mail.gmail.com
Diffstat (limited to 'arch/x86/lib')
-rw-r--r--arch/x86/lib/usercopy_32.c232
1 files changed, 106 insertions, 126 deletions
diff --git a/arch/x86/lib/usercopy_32.c b/arch/x86/lib/usercopy_32.c
index ef2a6a5d78e3..883b216c60b2 100644
--- a/arch/x86/lib/usercopy_32.c
+++ b/arch/x86/lib/usercopy_32.c
@@ -13,6 +13,7 @@
13#include <linux/interrupt.h> 13#include <linux/interrupt.h>
14#include <asm/uaccess.h> 14#include <asm/uaccess.h>
15#include <asm/mmx.h> 15#include <asm/mmx.h>
16#include <asm/asm.h>
16 17
17#ifdef CONFIG_X86_INTEL_USERCOPY 18#ifdef CONFIG_X86_INTEL_USERCOPY
18/* 19/*
@@ -127,10 +128,7 @@ long strnlen_user(const char __user *s, long n)
127 "3: movb $1,%%al\n" 128 "3: movb $1,%%al\n"
128 " jmp 1b\n" 129 " jmp 1b\n"
129 ".previous\n" 130 ".previous\n"
130 ".section __ex_table,\"a\"\n" 131 _ASM_EXTABLE(0b,2b)
131 " .align 4\n"
132 " .long 0b,2b\n"
133 ".previous"
134 :"=&r" (n), "=&D" (s), "=&a" (res), "=&c" (tmp) 132 :"=&r" (n), "=&D" (s), "=&a" (res), "=&c" (tmp)
135 :"0" (n), "1" (s), "2" (0), "3" (mask) 133 :"0" (n), "1" (s), "2" (0), "3" (mask)
136 :"cc"); 134 :"cc");
@@ -199,47 +197,44 @@ __copy_user_intel(void __user *to, const void *from, unsigned long size)
199 "101: lea 0(%%eax,%0,4),%0\n" 197 "101: lea 0(%%eax,%0,4),%0\n"
200 " jmp 100b\n" 198 " jmp 100b\n"
201 ".previous\n" 199 ".previous\n"
202 ".section __ex_table,\"a\"\n" 200 _ASM_EXTABLE(1b,100b)
203 " .align 4\n" 201 _ASM_EXTABLE(2b,100b)
204 " .long 1b,100b\n" 202 _ASM_EXTABLE(3b,100b)
205 " .long 2b,100b\n" 203 _ASM_EXTABLE(4b,100b)
206 " .long 3b,100b\n" 204 _ASM_EXTABLE(5b,100b)
207 " .long 4b,100b\n" 205 _ASM_EXTABLE(6b,100b)
208 " .long 5b,100b\n" 206 _ASM_EXTABLE(7b,100b)
209 " .long 6b,100b\n" 207 _ASM_EXTABLE(8b,100b)
210 " .long 7b,100b\n" 208 _ASM_EXTABLE(9b,100b)
211 " .long 8b,100b\n" 209 _ASM_EXTABLE(10b,100b)
212 " .long 9b,100b\n" 210 _ASM_EXTABLE(11b,100b)
213 " .long 10b,100b\n" 211 _ASM_EXTABLE(12b,100b)
214 " .long 11b,100b\n" 212 _ASM_EXTABLE(13b,100b)
215 " .long 12b,100b\n" 213 _ASM_EXTABLE(14b,100b)
216 " .long 13b,100b\n" 214 _ASM_EXTABLE(15b,100b)
217 " .long 14b,100b\n" 215 _ASM_EXTABLE(16b,100b)
218 " .long 15b,100b\n" 216 _ASM_EXTABLE(17b,100b)
219 " .long 16b,100b\n" 217 _ASM_EXTABLE(18b,100b)
220 " .long 17b,100b\n" 218 _ASM_EXTABLE(19b,100b)
221 " .long 18b,100b\n" 219 _ASM_EXTABLE(20b,100b)
222 " .long 19b,100b\n" 220 _ASM_EXTABLE(21b,100b)
223 " .long 20b,100b\n" 221 _ASM_EXTABLE(22b,100b)
224 " .long 21b,100b\n" 222 _ASM_EXTABLE(23b,100b)
225 " .long 22b,100b\n" 223 _ASM_EXTABLE(24b,100b)
226 " .long 23b,100b\n" 224 _ASM_EXTABLE(25b,100b)
227 " .long 24b,100b\n" 225 _ASM_EXTABLE(26b,100b)
228 " .long 25b,100b\n" 226 _ASM_EXTABLE(27b,100b)
229 " .long 26b,100b\n" 227 _ASM_EXTABLE(28b,100b)
230 " .long 27b,100b\n" 228 _ASM_EXTABLE(29b,100b)
231 " .long 28b,100b\n" 229 _ASM_EXTABLE(30b,100b)
232 " .long 29b,100b\n" 230 _ASM_EXTABLE(31b,100b)
233 " .long 30b,100b\n" 231 _ASM_EXTABLE(32b,100b)
234 " .long 31b,100b\n" 232 _ASM_EXTABLE(33b,100b)
235 " .long 32b,100b\n" 233 _ASM_EXTABLE(34b,100b)
236 " .long 33b,100b\n" 234 _ASM_EXTABLE(35b,100b)
237 " .long 34b,100b\n" 235 _ASM_EXTABLE(36b,100b)
238 " .long 35b,100b\n" 236 _ASM_EXTABLE(37b,100b)
239 " .long 36b,100b\n" 237 _ASM_EXTABLE(99b,101b)
240 " .long 37b,100b\n"
241 " .long 99b,101b\n"
242 ".previous"
243 : "=&c"(size), "=&D" (d0), "=&S" (d1) 238 : "=&c"(size), "=&D" (d0), "=&S" (d1)
244 : "1"(to), "2"(from), "0"(size) 239 : "1"(to), "2"(from), "0"(size)
245 : "eax", "edx", "memory"); 240 : "eax", "edx", "memory");
@@ -312,29 +307,26 @@ __copy_user_zeroing_intel(void *to, const void __user *from, unsigned long size)
312 " popl %0\n" 307 " popl %0\n"
313 " jmp 8b\n" 308 " jmp 8b\n"
314 ".previous\n" 309 ".previous\n"
315 ".section __ex_table,\"a\"\n" 310 _ASM_EXTABLE(0b,16b)
316 " .align 4\n" 311 _ASM_EXTABLE(1b,16b)
317 " .long 0b,16b\n" 312 _ASM_EXTABLE(2b,16b)
318 " .long 1b,16b\n" 313 _ASM_EXTABLE(21b,16b)
319 " .long 2b,16b\n" 314 _ASM_EXTABLE(3b,16b)
320 " .long 21b,16b\n" 315 _ASM_EXTABLE(31b,16b)
321 " .long 3b,16b\n" 316 _ASM_EXTABLE(4b,16b)
322 " .long 31b,16b\n" 317 _ASM_EXTABLE(41b,16b)
323 " .long 4b,16b\n" 318 _ASM_EXTABLE(10b,16b)
324 " .long 41b,16b\n" 319 _ASM_EXTABLE(51b,16b)
325 " .long 10b,16b\n" 320 _ASM_EXTABLE(11b,16b)
326 " .long 51b,16b\n" 321 _ASM_EXTABLE(61b,16b)
327 " .long 11b,16b\n" 322 _ASM_EXTABLE(12b,16b)
328 " .long 61b,16b\n" 323 _ASM_EXTABLE(71b,16b)
329 " .long 12b,16b\n" 324 _ASM_EXTABLE(13b,16b)
330 " .long 71b,16b\n" 325 _ASM_EXTABLE(81b,16b)
331 " .long 13b,16b\n" 326 _ASM_EXTABLE(14b,16b)
332 " .long 81b,16b\n" 327 _ASM_EXTABLE(91b,16b)
333 " .long 14b,16b\n" 328 _ASM_EXTABLE(6b,9b)
334 " .long 91b,16b\n" 329 _ASM_EXTABLE(7b,16b)
335 " .long 6b,9b\n"
336 " .long 7b,16b\n"
337 ".previous"
338 : "=&c"(size), "=&D" (d0), "=&S" (d1) 330 : "=&c"(size), "=&D" (d0), "=&S" (d1)
339 : "1"(to), "2"(from), "0"(size) 331 : "1"(to), "2"(from), "0"(size)
340 : "eax", "edx", "memory"); 332 : "eax", "edx", "memory");
@@ -414,29 +406,26 @@ static unsigned long __copy_user_zeroing_intel_nocache(void *to,
414 " popl %0\n" 406 " popl %0\n"
415 " jmp 8b\n" 407 " jmp 8b\n"
416 ".previous\n" 408 ".previous\n"
417 ".section __ex_table,\"a\"\n" 409 _ASM_EXTABLE(0b,16b)
418 " .align 4\n" 410 _ASM_EXTABLE(1b,16b)
419 " .long 0b,16b\n" 411 _ASM_EXTABLE(2b,16b)
420 " .long 1b,16b\n" 412 _ASM_EXTABLE(21b,16b)
421 " .long 2b,16b\n" 413 _ASM_EXTABLE(3b,16b)
422 " .long 21b,16b\n" 414 _ASM_EXTABLE(31b,16b)
423 " .long 3b,16b\n" 415 _ASM_EXTABLE(4b,16b)
424 " .long 31b,16b\n" 416 _ASM_EXTABLE(41b,16b)
425 " .long 4b,16b\n" 417 _ASM_EXTABLE(10b,16b)
426 " .long 41b,16b\n" 418 _ASM_EXTABLE(51b,16b)
427 " .long 10b,16b\n" 419 _ASM_EXTABLE(11b,16b)
428 " .long 51b,16b\n" 420 _ASM_EXTABLE(61b,16b)
429 " .long 11b,16b\n" 421 _ASM_EXTABLE(12b,16b)
430 " .long 61b,16b\n" 422 _ASM_EXTABLE(71b,16b)
431 " .long 12b,16b\n" 423 _ASM_EXTABLE(13b,16b)
432 " .long 71b,16b\n" 424 _ASM_EXTABLE(81b,16b)
433 " .long 13b,16b\n" 425 _ASM_EXTABLE(14b,16b)
434 " .long 81b,16b\n" 426 _ASM_EXTABLE(91b,16b)
435 " .long 14b,16b\n" 427 _ASM_EXTABLE(6b,9b)
436 " .long 91b,16b\n" 428 _ASM_EXTABLE(7b,16b)
437 " .long 6b,9b\n"
438 " .long 7b,16b\n"
439 ".previous"
440 : "=&c"(size), "=&D" (d0), "=&S" (d1) 429 : "=&c"(size), "=&D" (d0), "=&S" (d1)
441 : "1"(to), "2"(from), "0"(size) 430 : "1"(to), "2"(from), "0"(size)
442 : "eax", "edx", "memory"); 431 : "eax", "edx", "memory");
@@ -505,29 +494,26 @@ static unsigned long __copy_user_intel_nocache(void *to,
505 "9: lea 0(%%eax,%0,4),%0\n" 494 "9: lea 0(%%eax,%0,4),%0\n"
506 "16: jmp 8b\n" 495 "16: jmp 8b\n"
507 ".previous\n" 496 ".previous\n"
508 ".section __ex_table,\"a\"\n" 497 _ASM_EXTABLE(0b,16b)
509 " .align 4\n" 498 _ASM_EXTABLE(1b,16b)
510 " .long 0b,16b\n" 499 _ASM_EXTABLE(2b,16b)
511 " .long 1b,16b\n" 500 _ASM_EXTABLE(21b,16b)
512 " .long 2b,16b\n" 501 _ASM_EXTABLE(3b,16b)
513 " .long 21b,16b\n" 502 _ASM_EXTABLE(31b,16b)
514 " .long 3b,16b\n" 503 _ASM_EXTABLE(4b,16b)
515 " .long 31b,16b\n" 504 _ASM_EXTABLE(41b,16b)
516 " .long 4b,16b\n" 505 _ASM_EXTABLE(10b,16b)
517 " .long 41b,16b\n" 506 _ASM_EXTABLE(51b,16b)
518 " .long 10b,16b\n" 507 _ASM_EXTABLE(11b,16b)
519 " .long 51b,16b\n" 508 _ASM_EXTABLE(61b,16b)
520 " .long 11b,16b\n" 509 _ASM_EXTABLE(12b,16b)
521 " .long 61b,16b\n" 510 _ASM_EXTABLE(71b,16b)
522 " .long 12b,16b\n" 511 _ASM_EXTABLE(13b,16b)
523 " .long 71b,16b\n" 512 _ASM_EXTABLE(81b,16b)
524 " .long 13b,16b\n" 513 _ASM_EXTABLE(14b,16b)
525 " .long 81b,16b\n" 514 _ASM_EXTABLE(91b,16b)
526 " .long 14b,16b\n" 515 _ASM_EXTABLE(6b,9b)
527 " .long 91b,16b\n" 516 _ASM_EXTABLE(7b,16b)
528 " .long 6b,9b\n"
529 " .long 7b,16b\n"
530 ".previous"
531 : "=&c"(size), "=&D" (d0), "=&S" (d1) 517 : "=&c"(size), "=&D" (d0), "=&S" (d1)
532 : "1"(to), "2"(from), "0"(size) 518 : "1"(to), "2"(from), "0"(size)
533 : "eax", "edx", "memory"); 519 : "eax", "edx", "memory");
@@ -574,12 +560,9 @@ do { \
574 "3: lea 0(%3,%0,4),%0\n" \ 560 "3: lea 0(%3,%0,4),%0\n" \
575 " jmp 2b\n" \ 561 " jmp 2b\n" \
576 ".previous\n" \ 562 ".previous\n" \
577 ".section __ex_table,\"a\"\n" \ 563 _ASM_EXTABLE(4b,5b) \
578 " .align 4\n" \ 564 _ASM_EXTABLE(0b,3b) \
579 " .long 4b,5b\n" \ 565 _ASM_EXTABLE(1b,2b) \
580 " .long 0b,3b\n" \
581 " .long 1b,2b\n" \
582 ".previous" \
583 : "=&c"(size), "=&D" (__d0), "=&S" (__d1), "=r"(__d2) \ 566 : "=&c"(size), "=&D" (__d0), "=&S" (__d1), "=r"(__d2) \
584 : "3"(size), "0"(size), "1"(to), "2"(from) \ 567 : "3"(size), "0"(size), "1"(to), "2"(from) \
585 : "memory"); \ 568 : "memory"); \
@@ -616,12 +599,9 @@ do { \
616 " popl %0\n" \ 599 " popl %0\n" \
617 " jmp 2b\n" \ 600 " jmp 2b\n" \
618 ".previous\n" \ 601 ".previous\n" \
619 ".section __ex_table,\"a\"\n" \ 602 _ASM_EXTABLE(4b,5b) \
620 " .align 4\n" \ 603 _ASM_EXTABLE(0b,3b) \
621 " .long 4b,5b\n" \ 604 _ASM_EXTABLE(1b,6b) \
622 " .long 0b,3b\n" \
623 " .long 1b,6b\n" \
624 ".previous" \
625 : "=&c"(size), "=&D" (__d0), "=&S" (__d1), "=r"(__d2) \ 605 : "=&c"(size), "=&D" (__d0), "=&S" (__d1), "=r"(__d2) \
626 : "3"(size), "0"(size), "1"(to), "2"(from) \ 606 : "3"(size), "0"(size), "1"(to), "2"(from) \
627 : "memory"); \ 607 : "memory"); \
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