From cf79c601c4943c2285e54a5c2f8764103c78f77a Mon Sep 17 00:00:00 2001
From: gonzo <gonzo@ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f>
Date: Fri, 10 Feb 2012 06:42:50 +0000
Subject: [PATCH 121/175] Switch MIPS TLS implementation to Variant I

git-svn-id: http://svn.freebsd.org/base/head@231347 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
(cherry picked from commit d7319277b7e014d1ee7d64cb7c38919f072a41a7)

Signed-off-by: Xin Li <d@delphij.net>
---
 libexec/rtld-elf/mips/reloc.c        |   26 +++++++++++++++++++++++++-
 libexec/rtld-elf/mips/rtld_machdep.h |   23 +++++++++++++++++------
 libexec/rtld-elf/rtld.c              |    4 ++--
 3 files changed, 44 insertions(+), 9 deletions(-)

diff --git a/libexec/rtld-elf/mips/reloc.c b/libexec/rtld-elf/mips/reloc.c
index c160841..b954fa3 100644
--- a/libexec/rtld-elf/mips/reloc.c
+++ b/libexec/rtld-elf/mips/reloc.c
@@ -39,8 +39,11 @@ __FBSDID("$FreeBSD$");
 #include <string.h>
 #include <inttypes.h>
 
+#include <machine/sysarch.h>
+
 #include "debug.h"
 #include "rtld.h"
+#include "rtld_printf.h"
 
 #ifdef __mips_n64
 #define	GOT1_MASK	0x8000000000000000UL
@@ -528,11 +531,32 @@ reloc_jmpslot(Elf_Addr *where, Elf_Addr target, const Obj_Entry *defobj,
 void
 allocate_initial_tls(Obj_Entry *objs)
 {
+	char *tls;
 	
+	/*
+	 * Fix the size of the static TLS block by using the maximum
+	 * offset allocated so far and adding a bit for dynamic modules to
+	 * use.
+	 */
+	tls_static_space = tls_last_offset + tls_last_size + RTLD_STATIC_TLS_EXTRA;
+
+	tls = ((char *) allocate_tls(objs, NULL, TLS_TCB_SIZE, 8) 
+	    + TLS_TP_OFFSET + TLS_TCB_SIZE);
+
+	sysarch(MIPS_SET_TLS, tls);
+	rtld_printf("allocate_initial_tls -> %p(%p)\n", tls, tls - TLS_TP_OFFSET -  TLS_TCB_SIZE);
 }
 
 void *
 __tls_get_addr(tls_index* ti)
 {
-	return (NULL);
+	Elf_Addr** tls;
+	char *p;
+
+	sysarch(MIPS_GET_TLS, &tls);
+
+	p = tls_get_addr_common((Elf_Addr**)((Elf_Addr)tls - TLS_TP_OFFSET 
+	    - TLS_TCB_SIZE), ti->ti_module, ti->ti_offset);
+
+	return (p + TLS_DTV_OFFSET);
 }
diff --git a/libexec/rtld-elf/mips/rtld_machdep.h b/libexec/rtld-elf/mips/rtld_machdep.h
index 8a1b786..14fdf44 100644
--- a/libexec/rtld-elf/mips/rtld_machdep.h
+++ b/libexec/rtld-elf/mips/rtld_machdep.h
@@ -47,21 +47,32 @@ Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
 
 #define call_initfini_pointer(obj, target) \
 	(((InitFunc)(target))())
-	
+
+/*
+ * TLS
+ */
+
+#define TLS_TP_OFFSET	0x7000
+#define TLS_DTV_OFFSET	0x8000
+#ifdef __mips_n64
+#define TLS_TCB_SIZE	16
+#else
+#define TLS_TCB_SIZE	8
+#endif
+
 typedef struct {
 	unsigned long ti_module;
 	unsigned long ti_offset;
 } tls_index;
 
 #define round(size, align) \
-	(((size) + (align) - 1) & ~((align) - 1))
+    (((size) + (align) - 1) & ~((align) - 1))
 #define calculate_first_tls_offset(size, align) \
-	round(size, align)                                     
+    round(TLS_TCB_SIZE, align)
 #define calculate_tls_offset(prev_offset, prev_size, size, align) \
-	    round(prev_offset + prev_size, align)
+    round(prev_offset + prev_size, align)
 #define calculate_tls_end(off, size)    ((off) + (size))
-	
-	
+
 /*
  * Lazy binding entry point, called via PLT.
  */
diff --git a/libexec/rtld-elf/rtld.c b/libexec/rtld-elf/rtld.c
index 53e44d5..c0b2757 100644
--- a/libexec/rtld-elf/rtld.c
+++ b/libexec/rtld-elf/rtld.c
@@ -3543,7 +3543,7 @@ tls_get_addr_common(Elf_Addr** dtvp, int index, size_t offset)
 
 /* XXX not sure what variants to use for arm. */
 
-#if defined(__ia64__) || defined(__powerpc__)
+#if defined(__ia64__) || defined(__powerpc__) || defined(__mips__)
 
 /*
  * Allocate Static TLS using the Variant I method.
@@ -3625,7 +3625,7 @@ free_tls(void *tcb, size_t tcbsize, size_t tcbalign)
 #endif
 
 #if defined(__i386__) || defined(__amd64__) || defined(__sparc64__) || \
-    defined(__arm__) || defined(__mips__)
+    defined(__arm__)
 
 /*
  * Allocate Static TLS using the Variant II method.
-- 
1.7.9.4