[SPARC]: Fix dot-symbol exporting for good.

From: Al Viro <viro@ZenIV.linux.org.uk>

Instead of playing all of these hand-coded assembler aliasing games,
just translate symbol names in the name space ".sym" to "_Sym" at
module load time.

Signed-off-by: David S. Miller <davem@davemloft.net>

9 files changed, 36 insertions, 22 deletions

diff --git a/arch/sparc/kernel/module.c b/arch/sparc/kernel/module.c
index 7931d6f92819..787d5f1347ec 100644
--- a/arch/sparc/kernel/module.c
+++ b/arch/sparc/kernel/module.c
@@ -10,6 +10,7 @@
 #include <linux/vmalloc.h>
 #include <linux/fs.h>
 #include <linux/string.h>
+#include <linux/ctype.h>
 
 void *module_alloc(unsigned long size)
 {
@@ -37,7 +38,7 @@ void module_free(struct module *mod, void *module_region)
 }
 
 /* Make generic code ignore STT_REGISTER dummy undefined symbols,
- * and replace references to .func with func as in ppc64's dedotify.
+ * and replace references to .func with _Func
  */
 int module_frob_arch_sections(Elf_Ehdr *hdr,
                               Elf_Shdr *sechdrs,
@@ -64,8 +65,10 @@ int module_frob_arch_sections(Elf_Ehdr *hdr,
                                 sym[i].st_shndx = SHN_ABS;
                         else {
                                 char *name = strtab + sym[i].st_name;
-                                if (name[0] == '.')
-                                        memmove(name, name+1, strlen(name));
+                                if (name[0] == '.') {
+                                        name[0] = '_';
+                                        name[1] = toupper(name[1]);
+                                }
                         }
                 }
         }
diff --git a/arch/sparc/kernel/sparc_ksyms.c b/arch/sparc/kernel/sparc_ksyms.c
index f84809333624..1c8fd0fd9305 100644
--- a/arch/sparc/kernel/sparc_ksyms.c
+++ b/arch/sparc/kernel/sparc_ksyms.c
@@ -97,19 +97,12 @@ extern void ___rw_write_enter(void);
 /* Alias functions whose names begin with "." and export the aliases.
  * The module references will be fixed up by module_frob_arch_sections.
  */
-#define DOT_ALIAS2(__ret, __x, __arg1, __arg2) \
-        extern __ret __x(__arg1, __arg2); \
-        asm(".weak " #__x);\
-        asm(#__x "=." #__x);
-
-DOT_ALIAS2(int, div, int, int)
-DOT_ALIAS2(int, mul, int, int)
-DOT_ALIAS2(int, rem, int, int)
-DOT_ALIAS2(unsigned, udiv, unsigned, unsigned)
-DOT_ALIAS2(unsigned, umul, unsigned, unsigned)
-DOT_ALIAS2(unsigned, urem, unsigned, unsigned)
-
-#undef DOT_ALIAS2
+extern int _Div(int, int);
+extern int _Mul(int, int);
+extern int _Rem(int, int);
+extern unsigned _Udiv(unsigned, unsigned);
+extern unsigned _Umul(unsigned, unsigned);
+extern unsigned _Urem(unsigned, unsigned);
 
 /* used by various drivers */
 EXPORT_SYMBOL(sparc_cpu_model);
@@ -320,12 +313,12 @@ EXPORT_SYMBOL(__lshrdi3);
 EXPORT_SYMBOL(__muldi3);
 EXPORT_SYMBOL(__divdi3);
 
-EXPORT_SYMBOL(rem);
-EXPORT_SYMBOL(urem);
-EXPORT_SYMBOL(mul);
-EXPORT_SYMBOL(umul);
-EXPORT_SYMBOL(div);
-EXPORT_SYMBOL(udiv);
+EXPORT_SYMBOL(_Rem);
+EXPORT_SYMBOL(_Urem);
+EXPORT_SYMBOL(_Mul);
+EXPORT_SYMBOL(_Umul);
+EXPORT_SYMBOL(_Div);
+EXPORT_SYMBOL(_Udiv);
 
 #ifdef CONFIG_DEBUG_BUGVERBOSE
 EXPORT_SYMBOL(do_BUG);
diff --git a/arch/sparc/lib/mul.S b/arch/sparc/lib/mul.S
index 83dffbc2f62f..da693560d878 100644
--- a/arch/sparc/lib/mul.S
+++ b/arch/sparc/lib/mul.S
@@ -16,7 +16,9 @@
  */
 
         .globl .mul
+        .globl _Mul
 .mul:
+_Mul:   /* needed for export */
         mov     %o0, %y         ! multiplier -> Y
         andncc  %o0, 0xfff, %g0 ! test bits 12..31
         be      Lmul_shortway   ! if zero, can do it the short way
diff --git a/arch/sparc/lib/rem.S b/arch/sparc/lib/rem.S
index 44508148d055..bf015a90d07e 100644
--- a/arch/sparc/lib/rem.S
+++ b/arch/sparc/lib/rem.S
@@ -43,7 +43,9 @@
 
 
         .globl .rem
+        .globl _Rem
 .rem:
+_Rem:   /* needed for export */
         ! compute sign of result; if neither is negative, no problem
         orcc    %o1, %o0, %g0   ! either negative?
         bge     2f                      ! no, go do the divide
diff --git a/arch/sparc/lib/sdiv.S b/arch/sparc/lib/sdiv.S
index e0ad80b6f63d..af9451629d0b 100644
--- a/arch/sparc/lib/sdiv.S
+++ b/arch/sparc/lib/sdiv.S
@@ -43,7 +43,9 @@
 
 
         .globl .div
+        .globl _Div
 .div:
+_Div:   /* needed for export */
         ! compute sign of result; if neither is negative, no problem
         orcc    %o1, %o0, %g0   ! either negative?
         bge     2f                      ! no, go do the divide
diff --git a/arch/sparc/lib/udiv.S b/arch/sparc/lib/udiv.S
index 2abfc6b0f3e9..169e01da6715 100644
--- a/arch/sparc/lib/udiv.S
+++ b/arch/sparc/lib/udiv.S
@@ -43,7 +43,9 @@
 
 
         .globl .udiv
+        .globl _Udiv
 .udiv:
+_Udiv:  /* needed for export */
 
         ! Ready to divide.  Compute size of quotient; scale comparand.
         orcc    %o1, %g0, %o5
diff --git a/arch/sparc/lib/umul.S b/arch/sparc/lib/umul.S
index a784720a8a22..f0e5b20a2536 100644
--- a/arch/sparc/lib/umul.S
+++ b/arch/sparc/lib/umul.S
@@ -21,7 +21,9 @@
  */
 
         .globl .umul
+        .globl _Umul
 .umul:
+_Umul:  /* needed for export */
         or      %o0, %o1, %o4
         mov     %o0, %y         ! multiplier -> Y
 
diff --git a/arch/sparc/lib/urem.S b/arch/sparc/lib/urem.S
index ec7f0c502c56..6b92bdc8b04c 100644
--- a/arch/sparc/lib/urem.S
+++ b/arch/sparc/lib/urem.S
@@ -41,7 +41,9 @@
  */
 
         .globl .urem
+        .globl _Urem
 .urem:
+_Urem:  /* needed for export */
 
         ! Ready to divide.  Compute size of quotient; scale comparand.
         orcc    %o1, %g0, %o5
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 09ffca54b373..3bed09e625c0 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -370,6 +370,12 @@ handle_modversions(struct module *mod, struct elf_info *info,
                         /* Ignore register directives. */
                         if (ELF_ST_TYPE(sym->st_info) == STT_SPARC_REGISTER)
                                 break;
+                        if (symname[0] == '.') {
+                                char *munged = strdup(symname);
+                                munged[0] = '_';
+                                munged[1] = toupper(munged[1]);
+                                symname = munged;
+                        }
                 }
 #endif