/* Align . to a 8 byte boundary equals to maximum function alignment. */
#define ALIGN_FUNCTION() . = ALIGN(8)
-#define RODATA \
- . = ALIGN(4096); \
+/* 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) \
+ VMLINUX_SYMBOL(__stop___markers) = .;
+
+#define RO_DATA(align) \
+ . = ALIGN((align)); \
.rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
VMLINUX_SYMBOL(__start_rodata) = .; \
*(.rodata) *(.rodata.*) \
*(__vermagic) /* Kernel version magic */ \
+ *(__markers_strings) /* Markers: strings */ \
} \
\
.rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
*(__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) = .; \
*(__param) \
VMLINUX_SYMBOL(__stop___param) = .; \
+ . = ALIGN((align)); \
VMLINUX_SYMBOL(__end_rodata) = .; \
} \
- \
- . = ALIGN(4096);
+ . = ALIGN((align));
+
+/* RODATA provided for backward compatibility.
+ * All archs are supposed to use RO_DATA() */
+#define RODATA RO_DATA(4096)
#define SECURITY_INIT \
.security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
VMLINUX_SYMBOL(__security_initcall_end) = .; \
}
+/* .text section. Map to function alignment to avoid address changes
+ * during second ld run in second ld pass when generating System.map */
+#define TEXT_TEXT \
+ ALIGN_FUNCTION(); \
+ *(.text) \
+ *(.ref.text) \
+ *(.text.init.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 */
#define SCHED_TEXT \
*(.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. */
}
#define NOTES \
- .notes : { *(.note.*) } :note
+ .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
+ VMLINUX_SYMBOL(__start_notes) = .; \
+ *(.note.*) \
+ VMLINUX_SYMBOL(__stop_notes) = .; \
+ }
#define INITCALLS \
*(.initcall0.init) \
*(.initcall7.init) \
*(.initcall7s.init)
+#define PERCPU(align) \
+ . = ALIGN(align); \
+ __per_cpu_start = .; \
+ .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \
+ *(.data.percpu) \
+ *(.data.percpu.shared_aligned) \
+ } \
+ __per_cpu_end = .;