Author: kib
Date: Tue Oct 30 00:11:30 2018
New Revision: 339898
URL: https://svnweb.freebsd.org/changeset/base/339898
Log:
Convert amd64_get/set_fs/gsbase to ifunc.
Note that this is the first use of ifuncs in our userspace.
Sponsored by: The FreeBSD Foundation
MFC after: 1 month
Deleted:
head/lib/libc/amd64/sys/amd64_detect_rdfsgsbase.c
head/lib/libc/amd64/sys/amd64_detect_rdfsgsbase.h
Modified:
head/lib/libc/amd64/sys/Makefile.inc
head/lib/libc/amd64/sys/amd64_get_fsbase.c
head/lib/libc/amd64/sys/amd64_get_gsbase.c
head/lib/libc/amd64/sys/amd64_set_fsbase.c
head/lib/libc/amd64/sys/amd64_set_gsbase.c
Modified: head/lib/libc/amd64/sys/Makefile.inc
==============================================================================
--- head/lib/libc/amd64/sys/Makefile.inc Mon Oct 29 23:59:26 2018
(r339897)
+++ head/lib/libc/amd64/sys/Makefile.inc Tue Oct 30 00:11:30 2018
(r339898)
@@ -2,7 +2,6 @@
# $FreeBSD$
SRCS+= \
- amd64_detect_rdfsgsbase.c \
amd64_get_fsbase.c \
amd64_get_gsbase.c \
amd64_set_fsbase.c \
Modified: head/lib/libc/amd64/sys/amd64_get_fsbase.c
==============================================================================
--- head/lib/libc/amd64/sys/amd64_get_fsbase.c Mon Oct 29 23:59:26 2018
(r339897)
+++ head/lib/libc/amd64/sys/amd64_get_fsbase.c Tue Oct 30 00:11:30 2018
(r339898)
@@ -2,7 +2,7 @@
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2003 Peter Wemm
- * Copyright (c) 2017 The FreeBSD Foundation
+ * Copyright (c) 2017, 2018 The FreeBSD Foundation
* All rights reserved.
*
* Portions of this software were developed by Konstantin Belousov
@@ -33,18 +33,35 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
-#include <sys/types.h>
+#define IN_RTLD 1
+#include <sys/param.h>
+#undef IN_RTLD
#include <machine/cpufunc.h>
+#include <machine/specialreg.h>
#include <machine/sysarch.h>
-#include "amd64_detect_rdfsgsbase.h"
+#include <x86/ifunc.h>
+#include "libc_private.h"
-int
-amd64_get_fsbase(void **addr)
+static int
+amd64_get_fsbase_cpu(void **addr)
{
- if (amd64_detect_rdfsgsbase() == RDFSGS_SUPPORTED) {
- *addr = (void *)rdfsbase();
- return (0);
- }
+ *addr = (void *)rdfsbase();
+ return (0);
+}
+
+static int
+amd64_get_fsbase_syscall(void **addr)
+{
+
return (sysarch(AMD64_GET_FSBASE, addr));
+}
+
+DEFINE_UIFUNC(, int, amd64_get_fsbase, (void **), static)
+{
+
+ if (__getosreldate() >= P_OSREL_WRFSBASE &&
+ (cpu_stdext_feature & CPUID_STDEXT_FSGSBASE) != 0)
+ return (amd64_get_fsbase_cpu);
+ return (amd64_get_fsbase_syscall);
}
Modified: head/lib/libc/amd64/sys/amd64_get_gsbase.c
==============================================================================
--- head/lib/libc/amd64/sys/amd64_get_gsbase.c Mon Oct 29 23:59:26 2018
(r339897)
+++ head/lib/libc/amd64/sys/amd64_get_gsbase.c Tue Oct 30 00:11:30 2018
(r339898)
@@ -2,7 +2,7 @@
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2003 Peter Wemm
- * Copyright (c) 2017 The FreeBSD Foundation
+ * Copyright (c) 2017, 2018 The FreeBSD Foundation
* All rights reserved.
*
* Portions of this software were developed by Konstantin Belousov
@@ -33,18 +33,35 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
-#include <sys/types.h>
+#define IN_RTLD 1
+#include <sys/param.h>
+#undef IN_RTLD
#include <machine/cpufunc.h>
+#include <machine/specialreg.h>
#include <machine/sysarch.h>
-#include "amd64_detect_rdfsgsbase.h"
+#include <x86/ifunc.h>
+#include "libc_private.h"
-int
-amd64_get_gsbase(void **addr)
+static int
+amd64_get_gsbase_cpu(void **addr)
{
- if (amd64_detect_rdfsgsbase() == RDFSGS_SUPPORTED) {
- *addr = (void *)rdgsbase();
- return (0);
- }
+ *addr = (void *)rdgsbase();
+ return (0);
+}
+
+static int
+amd64_get_gsbase_syscall(void **addr)
+{
+
return (sysarch(AMD64_GET_GSBASE, addr));
+}
+
+DEFINE_UIFUNC(, int, amd64_get_gsbase, (void **), static)
+{
+
+ if (__getosreldate() >= P_OSREL_WRFSBASE &&
+ (cpu_stdext_feature & CPUID_STDEXT_FSGSBASE) != 0)
+ return (amd64_get_gsbase_cpu);
+ return (amd64_get_gsbase_syscall);
}
Modified: head/lib/libc/amd64/sys/amd64_set_fsbase.c
==============================================================================
--- head/lib/libc/amd64/sys/amd64_set_fsbase.c Mon Oct 29 23:59:26 2018
(r339897)
+++ head/lib/libc/amd64/sys/amd64_set_fsbase.c Tue Oct 30 00:11:30 2018
(r339898)
@@ -2,7 +2,7 @@
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2003 Peter Wemm
- * Copyright (c) 2017 The FreeBSD Foundation
+ * Copyright (c) 2017, 2018 The FreeBSD Foundation
* All rights reserved.
*
* Portions of this software were developed by Konstantin Belousov
@@ -33,18 +33,35 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
-#include <sys/types.h>
+#define IN_RTLD 1
+#include <sys/param.h>
+#undef IN_RTLD
#include <machine/cpufunc.h>
+#include <machine/specialreg.h>
#include <machine/sysarch.h>
-#include "amd64_detect_rdfsgsbase.h"
+#include <x86/ifunc.h>
+#include "libc_private.h"
-int
-amd64_set_fsbase(void *addr)
+static int
+amd64_set_fsbase_cpu(void *addr)
{
- if (amd64_detect_rdfsgsbase() == RDFSGS_SUPPORTED) {
- wrfsbase((uintptr_t)addr);
- return (0);
- }
+ wrfsbase((uintptr_t)addr);
+ return (0);
+}
+
+static int
+amd64_set_fsbase_syscall(void *addr)
+{
+
return (sysarch(AMD64_SET_FSBASE, &addr));
+}
+
+DEFINE_UIFUNC(, int, amd64_set_fsbase, (void *), static)
+{
+
+ if (__getosreldate() >= P_OSREL_WRFSBASE &&
+ (cpu_stdext_feature & CPUID_STDEXT_FSGSBASE) != 0)
+ return (amd64_set_fsbase_cpu);
+ return (amd64_set_fsbase_syscall);
}
Modified: head/lib/libc/amd64/sys/amd64_set_gsbase.c
==============================================================================
--- head/lib/libc/amd64/sys/amd64_set_gsbase.c Mon Oct 29 23:59:26 2018
(r339897)
+++ head/lib/libc/amd64/sys/amd64_set_gsbase.c Tue Oct 30 00:11:30 2018
(r339898)
@@ -2,7 +2,7 @@
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2003 Peter Wemm
- * Copyright (c) 2017 The FreeBSD Foundation
+ * Copyright (c) 2017, 2018 The FreeBSD Foundation
* All rights reserved.
*
* Portions of this software were developed by Konstantin Belousov
@@ -33,18 +33,35 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
-#include <sys/types.h>
+#define IN_RTLD 1
+#include <sys/param.h>
+#undef IN_RTLD
#include <machine/cpufunc.h>
+#include <machine/specialreg.h>
#include <machine/sysarch.h>
-#include "amd64_detect_rdfsgsbase.h"
+#include <x86/ifunc.h>
+#include "libc_private.h"
-int
-amd64_set_gsbase(void *addr)
+static int
+amd64_set_gsbase_cpu(void *addr)
{
- if (amd64_detect_rdfsgsbase() == RDFSGS_SUPPORTED) {
- wrgsbase((uintptr_t)addr);
- return (0);
- }
+ wrgsbase((uintptr_t)addr);
+ return (0);
+}
+
+static int
+amd64_set_gsbase_syscall(void *addr)
+{
+
return (sysarch(AMD64_SET_GSBASE, &addr));
+}
+
+DEFINE_UIFUNC(, int, amd64_set_gsbase, (void *), static)
+{
+
+ if (__getosreldate() >= P_OSREL_WRFSBASE &&
+ (cpu_stdext_feature & CPUID_STDEXT_FSGSBASE) != 0)
+ return (amd64_set_gsbase_cpu);
+ return (amd64_set_gsbase_syscall);
}
_______________________________________________
svn-src-all@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
