1 files changed, 88 insertions, 59 deletions

diff --git a/arch/i386/kernel/vmlinux.lds.S b/arch/i386/kernel/vmlinux.lds.S
index c6f84a0322ba..56e6ad5cb045 100644
--- a/arch/i386/kernel/vmlinux.lds.S
+++ b/arch/i386/kernel/vmlinux.lds.S
@@ -1,13 +1,26 @@
 /* ld script to make i386 Linux kernel
  * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>;
+ *
+ * Don't define absolute symbols until and unless you know that symbol
+ * value is should remain constant even if kernel image is relocated
+ * at run time. Absolute symbols are not relocated. If symbol value should
+ * change if kernel is relocated, make the symbol section relative and
+ * put it inside the section definition.
  */
 
+/* Don't define absolute symbols until and unless you know that symbol
+ * value is should remain constant even if kernel image is relocated
+ * at run time. Absolute symbols are not relocated. If symbol value should
+ * change if kernel is relocated, make the symbol section relative and
+ * put it inside the section definition.
+ */
 #define LOAD_OFFSET __PAGE_OFFSET
 
 #include <asm-generic/vmlinux.lds.h>
 #include <asm/thread_info.h>
 #include <asm/page.h>
 #include <asm/cache.h>
+#include <asm/boot.h>
 
 OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
 OUTPUT_ARCH(i386)
@@ -21,34 +34,35 @@ PHDRS {
 }
 SECTIONS
 {
-  . = __KERNEL_START;
+  . = LOAD_OFFSET + LOAD_PHYSICAL_ADDR;
   phys_startup_32 = startup_32 - LOAD_OFFSET;
   /* read-only */
-  _text = .;                    /* Text and read-only data */
   .text : AT(ADDR(.text) - LOAD_OFFSET) {
+        _text = .;                      /* Text and read-only data */
         *(.text)
         SCHED_TEXT
         LOCK_TEXT
         KPROBES_TEXT
         *(.fixup)
         *(.gnu.warning)
-        } :text = 0x9090
-
-  _etext = .;                   /* End of text section */
+        _etext = .;                     /* End of text section */
+  } :text = 0x9090
 
   . = ALIGN(16);                /* Exception table */
-  __start___ex_table = .;
-  __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { *(__ex_table) }
-  __stop___ex_table = .;
+  __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
+        __start___ex_table = .;
+         *(__ex_table)
+        __stop___ex_table = .;
+  }
 
   RODATA
 
   . = ALIGN(4);
-  __tracedata_start = .;
   .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {
+        __tracedata_start = .;
         *(.tracedata)
+        __tracedata_end = .;
   }
-  __tracedata_end = .;
 
   /* writeable */
   . = ALIGN(4096);
@@ -57,11 +71,19 @@ SECTIONS
         CONSTRUCTORS
         } :data
 
+  .paravirtprobe : AT(ADDR(.paravirtprobe) - LOAD_OFFSET) {
+        __start_paravirtprobe = .;
+        *(.paravirtprobe)
+        __stop_paravirtprobe = .;
+  }
+
   . = ALIGN(4096);
-  __nosave_begin = .;
-  .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { *(.data.nosave) }
-  . = ALIGN(4096);
-  __nosave_end = .;
+  .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
+        __nosave_begin = .;
+        *(.data.nosave)
+        . = ALIGN(4096);
+        __nosave_end = .;
+  }
 
   . = ALIGN(4096);
   .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
@@ -75,17 +97,10 @@ SECTIONS
 
   /* rarely changed data like cpu maps */
   . = ALIGN(32);
-  .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) { *(.data.read_mostly) }
-  _edata = .;                   /* End of data section */
-
-#ifdef CONFIG_STACK_UNWIND
-  . = ALIGN(4);
-  .eh_frame : AT(ADDR(.eh_frame) - LOAD_OFFSET) {
-        __start_unwind = .;
-        *(.eh_frame)
-        __end_unwind = .;
+  .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
+        *(.data.read_mostly)
+        _edata = .;             /* End of data section */
   }
-#endif
 
   . = ALIGN(THREAD_SIZE);       /* init_task */
   .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
@@ -94,88 +109,102 @@ SECTIONS
 
   /* might get freed after init */
   . = ALIGN(4096);
-  __smp_alt_begin = .;
-  __smp_alt_instructions = .;
   .smp_altinstructions : AT(ADDR(.smp_altinstructions) - LOAD_OFFSET) {
+        __smp_alt_begin = .;
+        __smp_alt_instructions = .;
         *(.smp_altinstructions)
+        __smp_alt_instructions_end = .;
   }
-  __smp_alt_instructions_end = .;
   . = ALIGN(4);
-  __smp_locks = .;
   .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
+        __smp_locks = .;
         *(.smp_locks)
+        __smp_locks_end = .;
   }
-  __smp_locks_end = .;
   .smp_altinstr_replacement : AT(ADDR(.smp_altinstr_replacement) - LOAD_OFFSET) {
         *(.smp_altinstr_replacement)
+        __smp_alt_end = .;
   }
+  /* will be freed after init
+   * Following ALIGN() is required to make sure no other data falls on the
+   * same page where __smp_alt_end is pointing as that page might be freed
+   * after boot. Always make sure that ALIGN() directive is present after
+   * the section which contains __smp_alt_end.
+   */
   . = ALIGN(4096);
-  __smp_alt_end = .;
 
   /* will be freed after init */
   . = ALIGN(4096);              /* Init code and data */
-  __init_begin = .;
   .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
+        __init_begin = .;
         _sinittext = .;
         *(.init.text)
         _einittext = .;
   }
   .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { *(.init.data) }
   . = ALIGN(16);
-  __setup_start = .;
-  .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { *(.init.setup) }
-  __setup_end = .;
-  __initcall_start = .;
+  .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
+        __setup_start = .;
+        *(.init.setup)
+        __setup_end = .;
+   }
   .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
+        __initcall_start = .;
         INITCALLS
+        __initcall_end = .;
   }
-  __initcall_end = .;
-  __con_initcall_start = .;
   .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
+        __con_initcall_start = .;
         *(.con_initcall.init)
+        __con_initcall_end = .;
   }
-  __con_initcall_end = .;
   SECURITY_INIT
   . = ALIGN(4);
-  __alt_instructions = .;
   .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
+        __alt_instructions = .;
         *(.altinstructions)
+        __alt_instructions_end = .;
   }
-  __alt_instructions_end = .; 
   .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
         *(.altinstr_replacement)
   }
+  . = ALIGN(4);
+  .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) {
+        __start_parainstructions = .;
+        *(.parainstructions)
+        __stop_parainstructions = .;
+  }
   /* .exit.text is discard at runtime, not link time, to deal with references
      from .altinstructions and .eh_frame */
   .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { *(.exit.text) }
   .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { *(.exit.data) }
   . = ALIGN(4096);
-  __initramfs_start = .;
-  .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) }
-  __initramfs_end = .;
+  .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
+        __initramfs_start = .;
+        *(.init.ramfs)
+        __initramfs_end = .;
+  }
   . = ALIGN(L1_CACHE_BYTES);
-  __per_cpu_start = .;
-  .data.percpu  : AT(ADDR(.data.percpu) - LOAD_OFFSET) { *(.data.percpu) }
-  __per_cpu_end = .;
+  .data.percpu  : AT(ADDR(.data.percpu) - LOAD_OFFSET) {
+        __per_cpu_start = .;
+        *(.data.percpu)
+        __per_cpu_end = .;
+  }
   . = ALIGN(4096);
-  __init_end = .;
   /* freed after init ends here */
         
-  __bss_start = .;              /* BSS */
-  .bss.page_aligned : AT(ADDR(.bss.page_aligned) - LOAD_OFFSET) {
-        *(.bss.page_aligned)
-  }
   .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
+        __init_end = .;
+        __bss_start = .;                /* BSS */
+        *(.bss.page_aligned)
         *(.bss)
+        . = ALIGN(4);
+        __bss_stop = .;
+        _end = . ;
+        /* This is where the kernel creates the early boot page tables */
+        . = ALIGN(4096);
+        pg0 = . ;
   }
-  . = ALIGN(4);
-  __bss_stop = .; 
-
-  _end = . ;
-
-  /* This is where the kernel creates the early boot page tables */
-  . = ALIGN(4096);
-  pg0 = .;
 
   /* Sections to be discarded */
   /DISCARD/ : {