1. 21 Apr, 2006 2 commits
  2. 20 Apr, 2006 37 commits
  3. 19 Apr, 2006 1 commit
    • OGAWA Hirofumi's avatar
      [PATCH] Add more prevent_tail_call() · 5a7b46b3
      OGAWA Hirofumi authored
      Those also break userland regs like following.
      
         00000000 <sys_chown16>:
            0:	0f b7 44 24 0c       	movzwl 0xc(%esp),%eax
            5:	83 ca ff             	or     $0xffffffff,%edx
            8:	0f b7 4c 24 08       	movzwl 0x8(%esp),%ecx
            d:	66 83 f8 ff          	cmp    $0xffffffff,%ax
           11:	0f 44 c2             	cmove  %edx,%eax
           14:	66 83 f9 ff          	cmp    $0xffffffff,%cx
           18:	0f 45 d1             	cmovne %ecx,%edx
           1b:	89 44 24 0c          	mov    %eax,0xc(%esp)
           1f:	89 54 24 08          	mov    %edx,0x8(%esp)
           23:	e9 fc ff ff ff       	jmp    24 <sys_chown16+0x24>
      
      where the tailcall at the end overwrites the incoming stack-frame.
      Signed-off-by: default avatarOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
      [ I would _really_ like to have a way to tell gcc about calling
        conventions. The "prevent_tail_call()" macro is pretty ugly ]
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      5a7b46b3