parisc: Use generic extable search and sort routines

Switch to the generic extable search and sort routines which were introduced
with commit a272858 from Ard Biesheuvel. This saves quite some memory in the
vmlinux binary with the 64bit kernel.

Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 14f655cf542e1eff76c5584b0a603d40a330e333..989fa14147a9b53847223dbc1c959dd08ba23232 100644 (file)
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -11,6 +11,7 @@ config PARISC
        select RTC_DRV_GENERIC
        select INIT_ALL_POSSIBLE
        select BUG
+       select BUILDTIME_EXTABLE_SORT
        select HAVE_PERF_EVENTS
        select GENERIC_ATOMIC64 if !64BIT
        select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE

diff --git a/arch/parisc/include/asm/assembly.h b/arch/parisc/include/asm/assembly.h
index b3069fd83468c5972f98d19f8f17dfa9bfb5e0cf..60e6f07b7e326bc4eb306105dcae477d5aa01f0e 100644 (file)
--- a/arch/parisc/include/asm/assembly.h
+++ b/arch/parisc/include/asm/assembly.h
@@ -523,7 +523,7 @@
         */
 #define ASM_EXCEPTIONTABLE_ENTRY(fault_addr, except_addr)      \
        .section __ex_table,"aw"                        !       \
-       ASM_ULONG_INSN  fault_addr, except_addr         !       \
+       .word (fault_addr - .), (except_addr - .)       !       \
        .previous
 
 

diff --git a/arch/parisc/include/asm/uaccess.h b/arch/parisc/include/asm/uaccess.h
index 0abdd4c607ed9dc22dce8610d8f8d1d016656553..d4dd6e58682ce582f9b6581095fb11e59dee2766 100644 (file)
--- a/arch/parisc/include/asm/uaccess.h
+++ b/arch/parisc/include/asm/uaccess.h
@@ -60,14 +60,15 @@ static inline long access_ok(int type, const void __user * addr,
  * use a 32bit (unsigned int) address here.
  */
 
+#define ARCH_HAS_RELATIVE_EXTABLE
 struct exception_table_entry {
-       unsigned long insn;     /* address of insn that is allowed to fault. */
-       unsigned long fixup;    /* fixup routine */
+       int insn;       /* relative address of insn that is allowed to fault. */
+       int fixup;      /* relative address of fixup routine */
 };
 
 #define ASM_EXCEPTIONTABLE_ENTRY( fault_addr, except_addr )\
        ".section __ex_table,\"aw\"\n"                     \
-       ASM_WORD_INSN #fault_addr ", " #except_addr "\n\t" \
+       ".word (" #fault_addr " - .), (" #except_addr " - .)\n\t" \
        ".previous\n"
 
 /*

diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index a762864ec92e9baf9bf2d2016474c21b94e026b8..26fac9c671c9375ab9ae1663617c237186f55aba 100644 (file)
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -140,12 +140,6 @@ int fixup_exception(struct pt_regs *regs)
 {
        const struct exception_table_entry *fix;
 
-       /* If we only stored 32bit addresses in the exception table we can drop
-        * out if we faulted on a 64bit address. */
-       if ((sizeof(regs->iaoq[0]) > sizeof(fix->insn))
-               && (regs->iaoq[0] >> 32))
-                       return 0;
-
        fix = search_exception_tables(regs->iaoq[0]);
        if (fix) {
                struct exception_data *d;
@@ -154,7 +148,8 @@ int fixup_exception(struct pt_regs *regs)
                d->fault_space = regs->isr;
                d->fault_addr = regs->ior;
 
-               regs->iaoq[0] = ((fix->fixup) & ~3);
+               regs->iaoq[0] = (unsigned long)&fix->fixup + fix->fixup;
+               regs->iaoq[0] &= ~3;
                /*
                 * NOTE: In some cases the faulting instruction
                 * may be in the delay slot of a branch. We

diff --git a/scripts/sortextable.c b/scripts/sortextable.c
index 62a1822e0f41beece4606304c4ce0412bbd5e4cb..f453b7ce99d66a66ebd7d8981b6eeaa8269da442 100644 (file)
--- a/scripts/sortextable.c
+++ b/scripts/sortextable.c
@@ -315,6 +315,7 @@ do_file(char const *const fname)
 
        case EM_S390:
        case EM_AARCH64:
+       case EM_PARISC:
                custom_sort = sort_relative_table;
                break;
        case EM_ARCOMPACT: