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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2006-11-05 20:39:25 +0000
committerThomas Schwinge <tschwinge@gnu.org>2009-06-18 00:26:50 +0200
commit851fdb496728e83cdb3f591a674d3425efc1f11c (patch)
treedb509b0e1331721cfc4228fbdd85a111692d148e /i386/include
parent0487d0193161eae0f56d2f9eab0d901dc8d0fe07 (diff)
2006-11-05 Barry deFreese <bddebian@comcast.net>
[task #5878 --- ``Backport code from GNU Mach's trunk to gnumach-1-branch: i386_set_gdt, i386_get_gdt''] * i386/include/mach/i386/mach_i386.defs (i386_set_gdt, i386_get_gdt): New routines. * i386/i386/user_ldt.c (i386_set_gdt, i386_get_gdt): New functions. * i386/i386/gdt.h (USER_GDT, USER_GDT_SLOTS): New macros. (GDTSZ): Compute it from USER_GDT and USER_GDT_SLOTS. * i386/i386/thread.h: Include `gdt.h'. (struct i386_machine_state): New member `user_gdt'. * i386/i386/pcb.c (switch_ktss): Copy those slots into the GDT. * linux/dev/include/linux/head.h: New file.
Diffstat (limited to 'i386/include')
-rw-r--r--i386/include/mach/i386/mach_i386.defs16
1 files changed, 16 insertions, 0 deletions
diff --git a/i386/include/mach/i386/mach_i386.defs b/i386/include/mach/i386/mach_i386.defs
index 55121b6..1f98dc3 100644
--- a/i386/include/mach/i386/mach_i386.defs
+++ b/i386/include/mach/i386/mach_i386.defs
@@ -66,3 +66,19 @@ routine i386_get_ldt(
first_selector : int;
selector_count : int;
out desc_list : descriptor_list_t);
+
+/* Modify one of a few available thread-specific segment descriptor slots.
+ The SELECTOR must be a value from a previous call (on any thread),
+ or -1 to allocate an available slot and return the segment selector for it.
+ These slots are copied into the CPU on each thread switch.
+ Returns KERN_NO_SPACE when there are no more slots available. */
+routine i386_set_gdt(
+ target_thread : thread_t;
+ inout selector : int;
+ desc : descriptor_t);
+
+/* Fetch a segment descriptor set with a prior i386_set_gdt call. */
+routine i386_get_gdt(
+ target_thread : thread_t;
+ selector : int;
+ out desc : descriptor_t);