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x86_64: Fix readahead/sync_file_range/fadvise64 compat calls 

Correctly convert the u64 arguments from 32bit to 64bit.

Pointed out by Heiko Carstens.

I guess this proves Linus' theory that nobody uses the more exotic Linux
specific syscalls.  It wasn't discovered by a user.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andi Kleen 2007-06-20 12:23:30 +02:00 committed by Linus Torvalds
parent 7c8545e984
commit e412ac4971
2 changed files with 22 additions and 3 deletions
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6
arch/x86_64/ia32/ia32entry.S
View File

@ -620,7 +620,7 @@ ia32_sys_call_table:
.quad quiet_ni_syscall /* tux */
.quad quiet_ni_syscall /* security */
.quad sys_gettid
.quad sys_readahead /* 225 */
.quad sys32_readahead /* 225 */
.quad sys_setxattr
.quad sys_lsetxattr
.quad sys_fsetxattr
@ -645,7 +645,7 @@ ia32_sys_call_table:
.quad compat_sys_io_getevents
.quad compat_sys_io_submit
.quad sys_io_cancel
.quad sys_fadvise64 /* 250 */
.quad sys32_fadvise64 /* 250 */
.quad quiet_ni_syscall /* free_huge_pages */
.quad sys_exit_group
.quad sys32_lookup_dcookie
@ -709,7 +709,7 @@ ia32_sys_call_table:
.quad compat_sys_set_robust_list
.quad compat_sys_get_robust_list
.quad sys_splice
.quad sys_sync_file_range
.quad sys32_sync_file_range
.quad sys_tee /* 315 */
.quad compat_sys_vmsplice
.quad compat_sys_move_pages

19
arch/x86_64/ia32/sys_ia32.c
View File

@ -860,3 +860,22 @@ long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
}
asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi, size_t count)
{
return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
}
asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
unsigned n_low, unsigned n_hi, int flags)
{
return sys_sync_file_range(fd,
((u64)off_hi << 32) | off_low,
((u64)n_hi << 32) | n_low, flags);
}
asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi, size_t len,
int advice)
{
return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
len, advice);
}