3 files changed, 33 insertions, 8 deletions

diff --git a/arch/xtensa/kernel/Makefile b/arch/xtensa/kernel/Makefile
index 7419dbccf027..fe3186de6a33 100644
--- a/arch/xtensa/kernel/Makefile
+++ b/arch/xtensa/kernel/Makefile
@@ -4,15 +4,30 @@
 
 extra-y := head.o vmlinux.lds
 
-
 obj-y := align.o entry.o irq.o coprocessor.o process.o ptrace.o \
          setup.o signal.o syscall.o time.o traps.o vectors.o platform.o  \
          pci-dma.o init_task.o io.o
 
-## windowspill.o
-
 obj-$(CONFIG_KGDB) += xtensa-stub.o
 obj-$(CONFIG_PCI) += pci.o
 obj-$(CONFIG_MODULES) += xtensa_ksyms.o module.o
 
+# In the Xtensa architecture, assembly generates literals which must always
+# precede the L32R instruction with a relative offset less than 256 kB.
+# Therefore, the .text and .literal section must be combined in parenthesis
+# in the linker script, such as: *(.literal .text).
+#
+# We need to post-process the generated vmlinux.lds scripts to convert
+# *(xxx.text) to  *(xxx.literal xxx.text) for the following text sections:
+#   .text .ref.text .*init.text .*exit.text .text.*
+#
+# Replicate rules in scripts/Makefile.build
+
+sed-y = -e 's/(\(\.[a-z]*it\|\.ref\|\)\.text)/(\1.literal \1.text)/g'   \
+        -e 's/(\(\.text\.[a-z]*\))/(\1.literal \1)/g'
+
+quiet_cmd__cpp_lds_S = LDS     $@
+      cmd__cpp_lds_S = $(CPP) $(cpp_flags) -D__ASSEMBLY__ $< | sed $(sed-y) >$@
 
+$(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE
+        $(call if_changed_dep,_cpp_lds_S)
diff --git a/arch/xtensa/kernel/traps.c b/arch/xtensa/kernel/traps.c
index 9f0b71189e94..ba9ab9349782 100644
--- a/arch/xtensa/kernel/traps.c
+++ b/arch/xtensa/kernel/traps.c
@@ -369,6 +369,18 @@ void show_regs(struct pt_regs * regs)
                        regs->syscall);
 }
 
+static __always_inline unsigned long *stack_pointer(struct task_struct *task)
+{
+        unsigned long *sp;
+
+        if (!task || task == current)
+                __asm__ __volatile__ ("mov %0, a1\n" : "=a"(sp));
+        else
+                sp = (unsigned long *)task->thread.sp;
+
+        return sp;
+}
+
 void show_trace(struct task_struct *task, unsigned long *sp)
 {
         unsigned long a0, a1, pc;
@@ -377,7 +389,7 @@ void show_trace(struct task_struct *task, unsigned long *sp)
         if (sp)
                 a1 = (unsigned long)sp;
         else
-                a1 = task->thread.sp;
+                a1 = (unsigned long)stack_pointer(task);
 
         sp_start = a1 & ~(THREAD_SIZE-1);
         sp_end = sp_start + THREAD_SIZE;
@@ -420,7 +432,7 @@ void show_stack(struct task_struct *task, unsigned long *sp)
         unsigned long *stack;
 
         if (!sp)
-                sp = (unsigned long *)task->thread.sp;
+                sp = stack_pointer(task);
         stack = sp;
 
         printk("\nStack: ");
diff --git a/arch/xtensa/kernel/vmlinux.lds.S b/arch/xtensa/kernel/vmlinux.lds.S
index 5accf51053da..41c159cd872f 100644
--- a/arch/xtensa/kernel/vmlinux.lds.S
+++ b/arch/xtensa/kernel/vmlinux.lds.S
@@ -87,7 +87,7 @@ SECTIONS
   {
     /* The HEAD_TEXT section must be the first section! */
     HEAD_TEXT
-    *(.literal .text)
+    TEXT_TEXT
     VMLINUX_SYMBOL(__sched_text_start) = .;
     *(.sched.literal .sched.text)
     VMLINUX_SYMBOL(__sched_text_end) = .;
@@ -139,8 +139,6 @@ SECTIONS
   __init_begin = .;
   .init.text : {
         _sinittext = .;
-        *(.init.literal) *(.cpuinit.literal) 
-        *(.devinit.literal) *(.meminit.literal)
         INIT_TEXT
         _einittext = .;
   }