Chagin Dmitry writes:
| On Fri, Mar 27, 2009 at 08:47:01AM -0700, Doug Ambrisko wrote:
| > Chagin Dmitry writes:
| > | On Thu, Mar 26, 2009 at 05:08:59PM -0700, Doug Ambrisko wrote:
| > [snip]
| > | > Okay, I did some more instrumenting again and found that I was
| > | > slightly wrong. The mmap that was failing was 0xcf79c000 and not
| > | > 0xf0000. This probably makes since since the sign bit was set
| > | > on 0xcf79c000. However, it appear mmap doesn't really do negative
| > | > seeks. Looking at the freebsd32_mmap the structure it uses for
| > | > args is:
| > | > struct freebsd6_freebsd32_mmap_args {
| > | > char addr_l_[PADL_(caddr_t)]; caddr_t addr; char
addr_r_[PADR_(caddr_t)];
| > | > char len_l_[PADL_(size_t)]; size_t len; char
len_r_[PADR_(size_t)];
| > | > char prot_l_[PADL_(int)]; int prot; char prot_r_[PADR_(int)];
| > | > char flags_l_[PADL_(int)]; int flags; char flags_r_[PADR_(int)];
| > | > char fd_l_[PADL_(int)]; int fd; char fd_r_[PADR_(int)];
| > | > char pad_l_[PADL_(int)]; int pad; char pad_r_[PADR_(int)];
| > | > char poslo_l_[PADL_(u_int32_t)]; u_int32_t poslo; char
poslo_r_[PADR_(u_int32_t)];
| > | > char poshi_l_[PADL_(u_int32_t)]; u_int32_t poshi; char
poshi_r_[PADR_(u_int32_t)];
| > | > };
| > | > with both the high and the lows being u_int32_t.
| > | >
| > | > So I wonder if in the linux32 the structure that is:
| > | > struct l_mmap_argv {
| > | > l_uintptr_t addr;
| > | > l_size_t len;
| > | > l_int prot;
| > | > l_int flags;
| > | > l_int fd;
| > | > l_off_t pgoff;
| > | > } __packed;
| > | > should be uint32_t for pgoff?
| > |
| > | yes, you are right. s/uint32_t/l_ulong/ :)
| > | also remove __packed.
| > | thnx!
| >
| > Index: linux.h
| > ===================================================================
| > RCS file: /usr/local/cvsroot/freebsd/src/sys/amd64/linux32/linux.h,v
| > retrieving revision 1.24
| > diff -u -p -r1.24 linux.h
| > --- linux.h 26 Mar 2009 17:14:22 -0000 1.24
| > +++ linux.h 27 Mar 2009 15:38:40 -0000
| > @@ -79,7 +79,7 @@ typedef l_ulong l_ino_t;
| > typedef l_int l_key_t;
| > typedef l_longlong l_loff_t;
| > typedef l_ushort l_mode_t;
| > -typedef l_ulong l_off_t;
| > +typedef l_long l_off_t;
| > typedef l_int l_pid_t;
| > typedef l_uint l_size_t;
| > typedef l_long l_suseconds_t;
| > @@ -179,8 +179,8 @@ struct l_mmap_argv {
| > l_int prot;
| > l_int flags;
| > l_int fd;
| > - l_off_t pgoff;
| > -} __packed;
| > + l_ulong pgoff;
| > +};
| >
| > /*
| > * stat family of syscalls
| >
| > Okay, then this is my proposed patch to fix this. This version works
| > fine for the Linux tool. If people are happy with it then I'll check it
| > in. I thought that I had greped for usage of l_off_t but missed that seek
| > was using it :-(
| >
|
| commit please.
Will do.
| and. please, look to r185438. I suggest to use it in mfi
Thanks for the pointer on that. I should also grab iovec32 from
compat/freebsd32/freebsd32.h.
Doug A.
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