Add the linux 2.6.x stuff (not used by default!):

 - TLS - complete
 - pid/tid mangling - complete
 - thread area - complete
 - futexes - complete with issues
 - clone() extension - complete with some possible minor issues
 - mq*/timer*/clock* stuff - complete but untested and the mq* stuff is
   disabled when not build as part of the kernel with native FreeBSD mq*
   support (module support for this will come later)

Tested with:
 - linux-firefox - works, tested
 - linux-opera - works, tested
 - linux-realplay - doesnt work, issue with futexes
 - linux-skype - doesnt work, issue with futexes
 - linux-rt2-demo - works, tested
 - linux-acroread - doesnt work, unknown reason (coredump) and sometimes
   issue with futexes
 - various unix utilities in linux-base-gentoo3 and linux-base-fc4:
   everything tried worked

On amd64 not everything is supported like on i386, the catchup is planned for
later when the remaining bugs in the new functions are fixed.

To test this new stuff, you have to run
	sysctl compat.linux.osrelease=2.6.16
to switch back use
	sysctl compat.linux.osrelease=2.4.2

Don't switch while running a linux program, strange things may or may not
happen.

Sponsored by:			Google SoC 2006
Submitted by:			rdivacky
Some suggestions/help by:	jhb, kib, manu@NetBSD.org, netchild

1 files changed, 99 insertions, 0 deletions

diff --git a/sys/i386/linux/linux.h b/sys/i386/linux/linux.h
index 08a76f3..4bbf303 100644
--- a/sys/i386/linux/linux.h
+++ b/sys/i386/linux/linux.h
@@ -32,6 +32,10 @@
 #define	_I386_LINUX_LINUX_H_
 
 #include <sys/signal.h> /* for sigval union */
+#include <sys/param.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/sx.h>
 
 #include <i386/linux/linux_syscall.h>
 
@@ -706,4 +710,99 @@ struct l_pollfd {
 	l_short		revents;
 };
 
+struct l_user_desc {
+	l_uint		entry_number;
+	l_uint		base_addr;
+	l_uint		limit;
+	l_uint		seg_32bit:1;
+	l_uint		contents:2;
+	l_uint		read_exec_only:1;
+	l_uint		limit_in_pages:1;
+	l_uint		seg_not_present:1;
+	l_uint		useable:1;
+};
+
+struct l_desc_struct {
+           unsigned long a,b;
+};
+
+
+#define LINUX_LOWERWORD	0x0000ffff
+
+/* macros which does the same thing as those in linux include/asm-um/ldt-i386.h 
+ * these convert linux user-space descriptor to machine one
+ */
+#define LDT_entry_a(info) \
+        ((((info)->base_addr & LINUX_LOWERWORD) << 16) | ((info)->limit & LINUX_LOWERWORD))
+
+#define ENTRY_B_READ_EXEC_ONLY	9
+#define ENTRY_B_CONTENTS	10
+#define ENTRY_B_SEG_NOT_PRESENT	15
+#define ENTRY_B_BASE_ADDR	16
+#define ENTRY_B_USEABLE		20
+#define ENTRY_B_SEG32BIT	22
+#define ENTRY_B_LIMIT		23
+
+#define LDT_entry_b(info) \
+        (((info)->base_addr & 0xff000000) | \
+        ((info)->limit & 0xf0000) | \
+        ((info)->contents << ENTRY_B_CONTENTS) | \
+        (((info)->seg_not_present == 0) << ENTRY_B_SEG_NOT_PRESENT) | \
+        (((info)->base_addr & 0x00ff0000) >> ENTRY_B_BASE_ADDR) | \
+        (((info)->read_exec_only == 0) << ENTRY_B_READ_EXEC_ONLY) | \
+        ((info)->seg_32bit << ENTRY_B_SEG32BIT) | \
+        ((info)->useable << ENTRY_B_USEABLE) | \
+        ((info)->limit_in_pages << ENTRY_B_LIMIT) | 0x7000)
+
+#define LDT_empty(info) (\
+        (info)->base_addr       == 0    && \
+        (info)->limit           == 0    && \
+        (info)->contents        == 0    && \
+        (info)->seg_not_present == 1    && \
+        (info)->read_exec_only  == 1    && \
+        (info)->seg_32bit       == 0    && \
+        (info)->limit_in_pages  == 0    && \
+        (info)->useable         == 0    )
+
+/* macros for converting segments, they do the same as those in arch/i386/kernel/process.c */
+#define GET_BASE(desc) ( \
+        (((desc)->a >> 16) & LINUX_LOWERWORD) | \
+        (((desc)->b << 16) & 0x00ff0000) | \
+        ( (desc)->b        & 0xff000000)   )
+
+#define GET_LIMIT(desc) ( \
+        ((desc)->a & LINUX_LOWERWORD) | \
+         ((desc)->b & 0xf0000) )
+
+#define GET_32BIT(desc)         (((desc)->b >> ENTRY_B_SEG32BIT) & 1)
+#define GET_CONTENTS(desc)      (((desc)->b >> ENTRY_B_CONTENTS) & 3)
+#define GET_WRITABLE(desc)      (((desc)->b >> ENTRY_B_READ_EXEC_ONLY) & 1)
+#define GET_LIMIT_PAGES(desc)   (((desc)->b >> ENTRY_B_LIMIT) & 1)
+#define GET_PRESENT(desc)       (((desc)->b >> ENTRY_B_SEG_NOT_PRESENT) & 1)
+#define GET_USEABLE(desc)       (((desc)->b >> ENTRY_B_USEABLE) & 1)
+
+#define LINUX_CLOCK_REALTIME            0
+#define LINUX_CLOCK_MONOTONIC           1
+#define LINUX_CLOCK_PROCESS_CPUTIME_ID  2
+#define LINUX_CLOCK_THREAD_CPUTIME_ID   3
+#define LINUX_CLOCK_REALTIME_HR         4
+#define LINUX_CLOCK_MONOTONIC_HR        5
+
+typedef int l_timer_t;
+typedef int l_mqd_t;
+
+#define CLONE_VM        0x100
+#define CLONE_FS        0x200
+#define CLONE_FILES     0x400
+#define CLONE_SIGHAND   0x800
+#define CLONE_PID       0x1000          /* this flag does not exist in linux anymore */
+#define CLONE_PARENT    0x00008000
+#define CLONE_THREAD    0x10000
+#define CLONE_SETTLS    0x80000
+#define CLONE_CHILD_CLEARTID    0x00200000
+#define CLONE_CHILD_SETTID      0x01000000
+#define CLONE_PARENT_SETTID     0x00100000
+
+#define THREADING_FLAGS (CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND)
+
 #endif /* !_I386_LINUX_LINUX_H_ */