Attachment 33167 Details for Bug 54451 – file.diff

[patch] file.diff

file.diff (text/plain), 2.12 KB, created by Andreas Fuchs on 2003-07-13 19:30:16 UTC

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Creator: Andreas Fuchs

Created: 2003-07-13 19:30:16 UTC

Size: 2.12 KB

patch

obsolete

>--- /usr/src/lib/libc/i386/sys/i386_get_ldt.2	Sun Jun 22 14:18:31 2003
>+++ i386_get_ldt.2	Sun Jul 13 18:20:17 2003
>@@ -52,46 +52,60 @@
> The
> .Fn i386_get_ldt
> system call
>-will return the list of i386 descriptors that the process has in its
>-LDT.
>+will copy the list of i386 descriptors that the process has in its
>+LDT. It does so starting from the LDT entry index 
>+.Fa start_sel
>+into an arrary pointed to by
>+.Fa descs ,
>+which must be
>+.Fa num_sel
>+elements wide.
>+.Pp
> The
> .Fn i386_set_ldt
> system call
> will set a list of i386 descriptors for the current process in its
>-LDT.
>-Both routines accept a starting selector number
>-.Fa start_sel ,
>-an array of memory that
>-will contain the descriptors to be set or returned
>-.Fa descs ,
>-and the number of entries to set or return
>-.Fa num_sels .
>+LDT, starting from the LDT entry index
>+.Fa start_sel .
>+It copies
>+.Fa num_descs
>+descriptors in the array pointed to by
>+.Fa descs
>+into the LDT.
> .Pp
> The argument
> .Fa descs
> can be either segment_descriptor or gate_descriptor and are defined in
> .Aq Pa i386/segments.h .
> These structures are defined by the architecture
>-as disjoint bit-fields, so care must be taken in constructing them.
>+as disjoint bit-fields, so you must take care in constructing them.
> .Sh RETURN VALUES
>-Upon successful completion,
>+If successful,
> .Fn i386_get_ldt
> returns the number of descriptors currently in the LDT.
>-The
> .Fn i386_set_ldt
>-system call
>-returns the first selector set.
>-Otherwise, a value of -1 is returned and the global
>+returns the index first selector that it set on success.  If an error
>+occurred, the procedures return a value of -1 and set the global
> variable
> .Va errno
>-is set to indicate the error.
>+to indicate the error.
>+.Sh EXAMPLES
>+To set the 
>+.Va "my_ldt_index"
>+th slot of the process's LDT to the value of 
>+.Va my_ldt_entry ,
>+use something like this:
>+.Bd -literal -offset indent
>+if (i386_set_ldt(my_ldt_index, &my_ldt_entry, 1) < 0) {
>+	perror("i386_set_ldt");
>+}
> .Sh ERRORS
> The
> .Fn i386_get_ldt
> and
> .Fn i386_set_ldt
> system calls
>-will fail if:
>+will fail with:
> .Bl -tag -width Er
> .It Bq Er EINVAL
> An inappropriate value was used for

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