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authorPaul Mackerras <paulus@samba.org>2006-02-07 17:43:08 -0500
committerPaul Mackerras <paulus@samba.org>2006-02-07 17:43:08 -0500
commit8f75015f33c3005e0bbf83ffc0d5e0b4262cc03d (patch)
treea3c34ad86ccdc904bb43af6cd1cb163231c29276 /arch/parisc/kernel/signal32.c
parent076d022c566fddde41fd4a858dd24bacad8304d7 (diff)
parente060e084e7d9e1c62d02cb6b8d3fe07db5317eaa (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
Diffstat (limited to 'arch/parisc/kernel/signal32.c')
-rw-r--r--arch/parisc/kernel/signal32.c102
1 files changed, 101 insertions, 1 deletions
diff --git a/arch/parisc/kernel/signal32.c b/arch/parisc/kernel/signal32.c
index 0792e20efef3..a6b4231cafa1 100644
--- a/arch/parisc/kernel/signal32.c
+++ b/arch/parisc/kernel/signal32.c
@@ -31,7 +31,6 @@
31#include <linux/types.h> 31#include <linux/types.h>
32#include <linux/errno.h> 32#include <linux/errno.h>
33 33
34#include <asm/compat_signal.h>
35#include <asm/uaccess.h> 34#include <asm/uaccess.h>
36 35
37#include "signal32.h" 36#include "signal32.h"
@@ -398,3 +397,104 @@ setup_sigcontext32(struct compat_sigcontext __user *sc, struct compat_regfile __
398 397
399 return err; 398 return err;
400} 399}
400
401int
402copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from)
403{
404 unsigned long tmp;
405 int err;
406
407 if (!access_ok(VERIFY_READ, from, sizeof(compat_siginfo_t)))
408 return -EFAULT;
409
410 err = __get_user(to->si_signo, &from->si_signo);
411 err |= __get_user(to->si_errno, &from->si_errno);
412 err |= __get_user(to->si_code, &from->si_code);
413
414 if (to->si_code < 0)
415 err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
416 else {
417 switch (to->si_code >> 16) {
418 case __SI_CHLD >> 16:
419 err |= __get_user(to->si_utime, &from->si_utime);
420 err |= __get_user(to->si_stime, &from->si_stime);
421 err |= __get_user(to->si_status, &from->si_status);
422 default:
423 err |= __get_user(to->si_pid, &from->si_pid);
424 err |= __get_user(to->si_uid, &from->si_uid);
425 break;
426 case __SI_FAULT >> 16:
427 err |= __get_user(tmp, &from->si_addr);
428 to->si_addr = (void __user *) tmp;
429 break;
430 case __SI_POLL >> 16:
431 err |= __get_user(to->si_band, &from->si_band);
432 err |= __get_user(to->si_fd, &from->si_fd);
433 break;
434 case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
435 case __SI_MESGQ >> 16:
436 err |= __get_user(to->si_pid, &from->si_pid);
437 err |= __get_user(to->si_uid, &from->si_uid);
438 err |= __get_user(to->si_int, &from->si_int);
439 break;
440 }
441 }
442 return err;
443}
444
445int
446copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from)
447{
448 unsigned int addr;
449 int err;
450
451 if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
452 return -EFAULT;
453
454 /* If you change siginfo_t structure, please be sure
455 this code is fixed accordingly.
456 It should never copy any pad contained in the structure
457 to avoid security leaks, but must copy the generic
458 3 ints plus the relevant union member.
459 This routine must convert siginfo from 64bit to 32bit as well
460 at the same time. */
461 err = __put_user(from->si_signo, &to->si_signo);
462 err |= __put_user(from->si_errno, &to->si_errno);
463 err |= __put_user((short)from->si_code, &to->si_code);
464 if (from->si_code < 0)
465 err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
466 else {
467 switch (from->si_code >> 16) {
468 case __SI_CHLD >> 16:
469 err |= __put_user(from->si_utime, &to->si_utime);
470 err |= __put_user(from->si_stime, &to->si_stime);
471 err |= __put_user(from->si_status, &to->si_status);
472 default:
473 err |= __put_user(from->si_pid, &to->si_pid);
474 err |= __put_user(from->si_uid, &to->si_uid);
475 break;
476 case __SI_FAULT >> 16:
477 /* avoid type-checking warnings by copying _pad[0] in lieu of si_addr... */
478 err |= __put_user(from->_sifields._pad[0], &to->si_addr);
479 break;
480 case __SI_POLL >> 16:
481 err |= __put_user(from->si_band, &to->si_band);
482 err |= __put_user(from->si_fd, &to->si_fd);
483 break;
484 case __SI_TIMER >> 16:
485 err |= __put_user(from->si_tid, &to->si_tid);
486 err |= __put_user(from->si_overrun, &to->si_overrun);
487 addr = (unsigned long) from->si_ptr;
488 err |= __put_user(addr, &to->si_ptr);
489 break;
490 case __SI_RT >> 16: /* Not generated by the kernel as of now. */
491 case __SI_MESGQ >> 16:
492 err |= __put_user(from->si_uid, &to->si_uid);
493 err |= __put_user(from->si_pid, &to->si_pid);
494 addr = (unsigned long) from->si_ptr;
495 err |= __put_user(addr, &to->si_ptr);
496 break;
497 }
498 }
499 return err;
500}