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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Minios-devel] [UNIKRAFT PATCH v2 3/4] plat/*: Introduce library constructors
This patch adds an array called ukplat_ctortab to the read-only
data section (rodata). This array is NULL-terminated and
consists of function pointers to constructors. The pointers are
sorted by priority (0-7) and the array is populated at link
time. Libraries can register a constructor function by using
the new macro UKPLAT_CTOR_FUNC() (provided with
include/uk/plat/ctors.h). It is intended that a bootstrapping
library is executing each function during boot so that
libraries can execute necessary initialization routines.
Signed-off-by: Simon Kuenzer <simon.kuenzer@xxxxxxxxx>
---
include/uk/plat/ctors.h | 82 +++++++++++++++++++++++++++++++++++++++++++++++
plat/kvm/x86/link64.ld | 21 ++++++++++++
plat/linuxu/arm/link32.ld | 21 ++++++++++++
plat/linuxu/x86/link64.ld | 21 ++++++++++++
plat/xen/arm/link32.ld | 28 +++++++++++++++-
plat/xen/x86/link64.ld | 21 ++++++++++++
6 files changed, 193 insertions(+), 1 deletion(-)
create mode 100644 include/uk/plat/ctors.h
diff --git a/include/uk/plat/ctors.h b/include/uk/plat/ctors.h
new file mode 100644
index 0000000..b992d12
--- /dev/null
+++ b/include/uk/plat/ctors.h
@@ -0,0 +1,82 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * Authors: Simon Kuenzer <simon.kuenzer@xxxxxxxxx>
+ *
+ *
+ * Copyright (c) 2017, NEC Europe Ltd., NEC Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * THIS HEADER MAY NOT BE EXTRACTED OR MODIFIED IN ANY WAY.
+ */
+
+#ifndef __UKPLAT_CTORS_H__
+#define __UKPLAT_CTORS_H__
+
+#include <uk/essentials.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef void (*ukplat_ctor_func_t)(void);
+
+
+/**
+ * NULL-terminated list of constructor function pointers.
+ * Array is generated by linker script.
+ * Functions have to be called during bootstrapping
+ * (e.g., libukboot).
+ */
+extern const ukplat_ctor_func_t ukplat_ctortab[];
+
+
+/**
+ * Register a constructor function that is
+ * called during bootstrapping
+ *
+ * @param lvl
+ * Priority level (0 (earliest) -7 (latest))
+ * Note: Any other value for level will be ignored
+ * @param ctorf
+ * Constructor function to be called
+ */
+#define UKPLAT_CTOR_FUNC(lvl, ctorf) \
+ _UKPLAT_CTOR_FUNC(lvl, __LIBNAME__, ctorf)
+
+#define _UKPLAT_CTOR_FUNC(lvl, libname, ctorf) \
+ __UKPLAT_CTOR_FUNC(lvl, libname, ctorf)
+
+#define __UKPLAT_CTOR_FUNC(lvl, libname, ctorf) \
+ static const ukplat_ctor_func_t \
+ __used __section(".ukplat_ctortab" #lvl) \
+ __ukplat_ctab ## lvl ## _ ## libname ## _ ## ctorf = (ctorf)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __UKPLAT_CTORS_H__ */
diff --git a/plat/kvm/x86/link64.ld b/plat/kvm/x86/link64.ld
index 85ea058..b70557c 100644
--- a/plat/kvm/x86/link64.ld
+++ b/plat/kvm/x86/link64.ld
@@ -48,6 +48,27 @@ SECTIONS {
{
*(.rodata)
*(.rodata.*)
+
+ /* Constructor table */
+ . = ALIGN(0x8);
+ ukplat_ctortab = .;
+ *(.ukplat_ctortab0)
+ *(.ukplat_ctortab0.*)
+ *(.ukplat_ctortab1)
+ *(.ukplat_ctortab1.*)
+ *(.ukplat_ctortab2)
+ *(.ukplat_ctortab2.*)
+ *(.ukplat_ctortab3)
+ *(.ukplat_ctortab3.*)
+ *(.ukplat_ctortab4)
+ *(.ukplat_ctortab4.*)
+ *(.ukplat_ctortab5)
+ *(.ukplat_ctortab5.*)
+ *(.ukplat_ctortab6)
+ *(.ukplat_ctortab6.*)
+ *(.ukplat_ctortab7)
+ *(.ukplat_ctortab7.*)
+ LONG(0); /* NULL termination */
}
.eh_frame :
{
diff --git a/plat/linuxu/arm/link32.ld b/plat/linuxu/arm/link32.ld
index 7dac4f6..1122979 100644
--- a/plat/linuxu/arm/link32.ld
+++ b/plat/linuxu/arm/link32.ld
@@ -54,6 +54,27 @@ SECTIONS {
{
*(.rodata)
*(.rodata.*)
+
+ /* Constructor table */
+ . = ALIGN(0x4);
+ ukplat_ctortab = .;
+ *(.ukplat_ctortab0)
+ *(.ukplat_ctortab0.*)
+ *(.ukplat_ctortab1)
+ *(.ukplat_ctortab1.*)
+ *(.ukplat_ctortab2)
+ *(.ukplat_ctortab2.*)
+ *(.ukplat_ctortab3)
+ *(.ukplat_ctortab3.*)
+ *(.ukplat_ctortab4)
+ *(.ukplat_ctortab4.*)
+ *(.ukplat_ctortab5)
+ *(.ukplat_ctortab5.*)
+ *(.ukplat_ctortab6)
+ *(.ukplat_ctortab6.*)
+ *(.ukplat_ctortab7)
+ *(.ukplat_ctortab7.*)
+ LONG(0);
}
. = ALIGN(0x1000);
_erodata = .;
diff --git a/plat/linuxu/x86/link64.ld b/plat/linuxu/x86/link64.ld
index a7d642d..a09b89c 100644
--- a/plat/linuxu/x86/link64.ld
+++ b/plat/linuxu/x86/link64.ld
@@ -55,6 +55,27 @@ SECTIONS {
{
*(.rodata)
*(.rodata.*)
+
+ /* Constructor table */
+ . = ALIGN(0x8);
+ ukplat_ctortab = .;
+ *(.ukplat_ctortab0)
+ *(.ukplat_ctortab0.*)
+ *(.ukplat_ctortab1)
+ *(.ukplat_ctortab1.*)
+ *(.ukplat_ctortab2)
+ *(.ukplat_ctortab2.*)
+ *(.ukplat_ctortab3)
+ *(.ukplat_ctortab3.*)
+ *(.ukplat_ctortab4)
+ *(.ukplat_ctortab4.*)
+ *(.ukplat_ctortab5)
+ *(.ukplat_ctortab5.*)
+ *(.ukplat_ctortab6)
+ *(.ukplat_ctortab6.*)
+ *(.ukplat_ctortab7)
+ *(.ukplat_ctortab7.*)
+ LONG(0); /* NULL termination */
}
. = ALIGN(0x1000);
_erodata = .;
diff --git a/plat/xen/arm/link32.ld b/plat/xen/arm/link32.ld
index 77184c0..72182c9 100644
--- a/plat/xen/arm/link32.ld
+++ b/plat/xen/arm/link32.ld
@@ -47,8 +47,34 @@ SECTIONS
_etext = .; /* End of text section */
+ /* Read-only data */
_rodata = .;
- .rodata : { *(.rodata) *(.rodata.*) }
+ .rodata :
+ {
+ *(.rodata)
+ *(.rodata.*)
+
+ /* Constructor table */
+ . = ALIGN(0x4);
+ ukplat_ctortab = .;
+ *(.ukplat_ctortab0)
+ *(.ukplat_ctortab0.*)
+ *(.ukplat_ctortab1)
+ *(.ukplat_ctortab1.*)
+ *(.ukplat_ctortab2)
+ *(.ukplat_ctortab2.*)
+ *(.ukplat_ctortab3)
+ *(.ukplat_ctortab3.*)
+ *(.ukplat_ctortab4)
+ *(.ukplat_ctortab4.*)
+ *(.ukplat_ctortab5)
+ *(.ukplat_ctortab5.*)
+ *(.ukplat_ctortab6)
+ *(.ukplat_ctortab6.*)
+ *(.ukplat_ctortab7)
+ *(.ukplat_ctortab7.*)
+ LONG(0); /* NULL termination */
+ }
. = ALIGN(4096);
_erodata = .;
diff --git a/plat/xen/x86/link64.ld b/plat/xen/x86/link64.ld
index dd092aa..df43034 100644
--- a/plat/xen/x86/link64.ld
+++ b/plat/xen/x86/link64.ld
@@ -43,6 +43,27 @@ SECTIONS
.rodata : {
*(.rodata)
*(.rodata.*)
+
+ /* Constructor table */
+ . = ALIGN(0x8);
+ ukplat_ctortab = .;
+ *(.ukplat_ctortab0)
+ *(.ukplat_ctortab0.*)
+ *(.ukplat_ctortab1)
+ *(.ukplat_ctortab1.*)
+ *(.ukplat_ctortab2)
+ *(.ukplat_ctortab2.*)
+ *(.ukplat_ctortab3)
+ *(.ukplat_ctortab3.*)
+ *(.ukplat_ctortab4)
+ *(.ukplat_ctortab4.*)
+ *(.ukplat_ctortab5)
+ *(.ukplat_ctortab5.*)
+ *(.ukplat_ctortab6)
+ *(.ukplat_ctortab6.*)
+ *(.ukplat_ctortab7)
+ *(.ukplat_ctortab7.*)
+ LONG(0); /* NULL termination */
}
. = ALIGN(4096);
_erodata = .;
--
2.7.4
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