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authorLinus Torvalds <torvalds@linux-foundation.org>2008-01-29 22:46:14 +1100
committerLinus Torvalds <torvalds@linux-foundation.org>2008-01-29 22:46:14 +1100
commit5ea293a9048d3a58cb0c840fa719d85ad14cba47 (patch)
tree88d1dd1eece2cfcbd858ff2c00fb0240dcfab3c7 /include/asm-generic
parent03bc26cfefd6db756e6bc7fcda11dc17ada7be16 (diff)
parentd3883ecebbf9e095b9e379dabbbe8b2c1ee7a41c (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild: (79 commits) Remove references to "make dep" kconfig: document use of HAVE_* Introduce new section reference annotations tags: __ref, __refdata, __refconst kbuild: warn about ld added unique sections kbuild: add verbose option to Section mismatch reporting in modpost kconfig: tristate choices with mixed tristate and boolean values asm-generic/vmlix.lds.h: simplify __mem{init,exit}* dependencies remove __attribute_used__ kbuild: support ARCH=x86 in buildtar kconfig: remove "enable" kbuild: simplified warning report in modpost kbuild: introduce a few helpers in modpost kbuild: use simpler section mismatch warnings in modpost kbuild: link vmlinux.o before kallsyms passes kbuild: introduce new option to enhance section mismatch analysis Use separate sections for __dev/__cpu/__mem code/data compiler.h: introduce __section() all archs: consolidate init and exit sections in vmlinux.lds.h kbuild: check section names consistently in modpost kbuild: introduce blacklisting in modpost ...
Diffstat (limited to 'include/asm-generic')
-rw-r--r--include/asm-generic/vmlinux.lds.h89
1 files changed, 87 insertions, 2 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 9f584cc5c5f..76df771be58 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -9,10 +9,46 @@
/* Align . to a 8 byte boundary equals to maximum function alignment. */
#define ALIGN_FUNCTION() . = ALIGN(8)
+/* The actual configuration determine if the init/exit sections
+ * are handled as text/data or they can be discarded (which
+ * often happens at runtime)
+ */
+#ifdef CONFIG_HOTPLUG
+#define DEV_KEEP(sec) *(.dev##sec)
+#define DEV_DISCARD(sec)
+#else
+#define DEV_KEEP(sec)
+#define DEV_DISCARD(sec) *(.dev##sec)
+#endif
+
+#ifdef CONFIG_HOTPLUG_CPU
+#define CPU_KEEP(sec) *(.cpu##sec)
+#define CPU_DISCARD(sec)
+#else
+#define CPU_KEEP(sec)
+#define CPU_DISCARD(sec) *(.cpu##sec)
+#endif
+
+#if defined(CONFIG_MEMORY_HOTPLUG)
+#define MEM_KEEP(sec) *(.mem##sec)
+#define MEM_DISCARD(sec)
+#else
+#define MEM_KEEP(sec)
+#define MEM_DISCARD(sec) *(.mem##sec)
+#endif
+
+
/* .data section */
#define DATA_DATA \
*(.data) \
*(.data.init.refok) \
+ *(.ref.data) \
+ DEV_KEEP(init.data) \
+ DEV_KEEP(exit.data) \
+ CPU_KEEP(init.data) \
+ CPU_KEEP(exit.data) \
+ MEM_KEEP(init.data) \
+ MEM_KEEP(exit.data) \
. = ALIGN(8); \
VMLINUX_SYMBOL(__start___markers) = .; \
*(__markers) \
@@ -132,6 +168,17 @@
*(__ksymtab_strings) \
} \
\
+ /* __*init sections */ \
+ __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
+ *(.ref.rodata) \
+ DEV_KEEP(init.rodata) \
+ DEV_KEEP(exit.rodata) \
+ CPU_KEEP(init.rodata) \
+ CPU_KEEP(exit.rodata) \
+ MEM_KEEP(init.rodata) \
+ MEM_KEEP(exit.rodata) \
+ } \
+ \
/* Built-in module parameters. */ \
__param : AT(ADDR(__param) - LOAD_OFFSET) { \
VMLINUX_SYMBOL(__start___param) = .; \
@@ -139,7 +186,6 @@
VMLINUX_SYMBOL(__stop___param) = .; \
VMLINUX_SYMBOL(__end_rodata) = .; \
} \
- \
. = ALIGN((align));
/* RODATA provided for backward compatibility.
@@ -158,8 +204,16 @@
#define TEXT_TEXT \
ALIGN_FUNCTION(); \
*(.text) \
+ *(.ref.text) \
*(.text.init.refok) \
- *(.exit.text.refok)
+ *(.exit.text.refok) \
+ DEV_KEEP(init.text) \
+ DEV_KEEP(exit.text) \
+ CPU_KEEP(init.text) \
+ CPU_KEEP(exit.text) \
+ MEM_KEEP(init.text) \
+ MEM_KEEP(exit.text)
+
/* sched.text is aling to function alignment to secure we have same
* address even at second ld pass when generating System.map */
@@ -183,6 +237,37 @@
*(.kprobes.text) \
VMLINUX_SYMBOL(__kprobes_text_end) = .;
+/* init and exit section handling */
+#define INIT_DATA \
+ *(.init.data) \
+ DEV_DISCARD(init.data) \
+ DEV_DISCARD(init.rodata) \
+ CPU_DISCARD(init.data) \
+ CPU_DISCARD(init.rodata) \
+ MEM_DISCARD(init.data) \
+ MEM_DISCARD(init.rodata)
+
+#define INIT_TEXT \
+ *(.init.text) \
+ DEV_DISCARD(init.text) \
+ CPU_DISCARD(init.text) \
+ MEM_DISCARD(init.text)
+
+#define EXIT_DATA \
+ *(.exit.data) \
+ DEV_DISCARD(exit.data) \
+ DEV_DISCARD(exit.rodata) \
+ CPU_DISCARD(exit.data) \
+ CPU_DISCARD(exit.rodata) \
+ MEM_DISCARD(exit.data) \
+ MEM_DISCARD(exit.rodata)
+
+#define EXIT_TEXT \
+ *(.exit.text) \
+ DEV_DISCARD(exit.text) \
+ CPU_DISCARD(exit.text) \
+ MEM_DISCARD(exit.text)
+
/* DWARF debug sections.
Symbols in the DWARF debugging sections are relative to
the beginning of the section so we begin them at 0. */