kernel: fix a relative addressing bug in the mips module relocation code change

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16831 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/generic-2.6/patches-2.6.28/026-mips_module_reloc.patch b/target/linux/generic-2.6/patches-2.6.28/026-mips_module_reloc.patch
index 49978ee..ddf92b2 100644 (file)
--- a/target/linux/generic-2.6/patches-2.6.28/026-mips_module_reloc.patch
+++ b/target/linux/generic-2.6/patches-2.6.28/026-mips_module_reloc.patch
@@ -209,7 +209,7 @@
        return 0;
  }
  
-@@ -97,45 +248,73 @@ static int apply_r_mips_32_rela(struct m
+@@ -97,27 +248,44 @@ static int apply_r_mips_32_rela(struct m
        return 0;
  }
  
@@ -231,15 +231,15 @@
 -      }
 +      if (*plt_offset == size)
 +              return 0;
-+
+ 
+-      *location = (*location & ~0x03ffffff) |
+-                  ((*location + (v >> 2)) & 0x03ffffff);
 +      *plt_offset += 4 * sizeof(int);
 +
 +      /* adjust carry for addiu */
 +      if (v & 0x00008000)
 +              v += 0x10000;
- 
--      *location = (*location & ~0x03ffffff) |
--                  ((*location + (v >> 2)) & 0x03ffffff);
++
 +      tramp[0] = 0x3c190000 | (v >> 16);      /* lui t9, hi16 */
 +      tramp[1] = 0x27390000 | (v & 0xffff);   /* addiu t9, t9, lo16 */
 +      tramp[2] = 0x03200008;                  /* jr t9 */
@@ -268,16 +268,20 @@
  {
        if (v % 4) {
                printk(KERN_ERR "module %s: dangerous relocation\n", me->name);
-               return -ENOEXEC;
+@@ -125,17 +293,31 @@ static int apply_r_mips_26_rela(struct m
        }
  
--      if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
-+      if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000) &&
-+          ((v = add_plt_entry(me, location, v + (ofs << 2))) == 0)) {
-               printk(KERN_ERR
+       if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
+-              printk(KERN_ERR
++          v = add_plt_entry(me, location, v + (ofs << 2));
++              if (!v) {
++                      printk(KERN_ERR
                       "module %s: relocation overflow\n",
                       me->name);
-               return -ENOEXEC;
+-              return -ENOEXEC;
++                      return -ENOEXEC;
++              }
++              ofs = 0;
        }
  
 -      *location = (*location & ~0x03ffffff) | ((v >> 2) & 0x03ffffff);
@@ -299,7 +303,7 @@
  static int apply_r_mips_hi16_rel(struct module *me, u32 *location, Elf_Addr v)
  {
        struct mips_hi16 *n;
-@@ -400,11 +579,23 @@ int module_finalize(const Elf_Ehdr *hdr,
+@@ -400,11 +582,23 @@ int module_finalize(const Elf_Ehdr *hdr,
                list_add(&me->arch.dbe_list, &dbe_list);
                spin_unlock_irq(&dbe_lock);
        }

diff --git a/target/linux/generic-2.6/patches-2.6.30/027-mips_module_reloc.patch b/target/linux/generic-2.6/patches-2.6.30/027-mips_module_reloc.patch
index 912857b..66ceffa 100644 (file)
--- a/target/linux/generic-2.6/patches-2.6.30/027-mips_module_reloc.patch
+++ b/target/linux/generic-2.6/patches-2.6.30/027-mips_module_reloc.patch
@@ -209,7 +209,7 @@
        return 0;
  }
  
-@@ -97,45 +248,73 @@ static int apply_r_mips_32_rela(struct m
+@@ -97,27 +248,44 @@ static int apply_r_mips_32_rela(struct m
        return 0;
  }
  
@@ -231,15 +231,15 @@
 -      }
 +      if (*plt_offset == size)
 +              return 0;
-+
+ 
+-      *location = (*location & ~0x03ffffff) |
+-                  ((*location + (v >> 2)) & 0x03ffffff);
 +      *plt_offset += 4 * sizeof(int);
 +
 +      /* adjust carry for addiu */
 +      if (v & 0x00008000)
 +              v += 0x10000;
- 
--      *location = (*location & ~0x03ffffff) |
--                  ((*location + (v >> 2)) & 0x03ffffff);
++
 +      tramp[0] = 0x3c190000 | (v >> 16);      /* lui t9, hi16 */
 +      tramp[1] = 0x27390000 | (v & 0xffff);   /* addiu t9, t9, lo16 */
 +      tramp[2] = 0x03200008;                  /* jr t9 */
@@ -268,16 +268,20 @@
  {
        if (v % 4) {
                printk(KERN_ERR "module %s: dangerous relocation\n", me->name);
-               return -ENOEXEC;
+@@ -125,17 +293,31 @@ static int apply_r_mips_26_rela(struct m
        }
  
--      if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
-+      if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000) &&
-+          ((v = add_plt_entry(me, location, v + (ofs << 2))) == 0)) {
-               printk(KERN_ERR
+       if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
+-              printk(KERN_ERR
++          v = add_plt_entry(me, location, v + (ofs << 2));
++              if (!v) {
++                      printk(KERN_ERR
                       "module %s: relocation overflow\n",
                       me->name);
-               return -ENOEXEC;
+-              return -ENOEXEC;
++                      return -ENOEXEC;
++              }
++              ofs = 0;
        }
  
 -      *location = (*location & ~0x03ffffff) | ((v >> 2) & 0x03ffffff);
@@ -299,7 +303,7 @@
  static int apply_r_mips_hi16_rel(struct module *me, u32 *location, Elf_Addr v)
  {
        struct mips_hi16 *n;
-@@ -400,11 +579,23 @@ int module_finalize(const Elf_Ehdr *hdr,
+@@ -400,11 +582,23 @@ int module_finalize(const Elf_Ehdr *hdr,
                list_add(&me->arch.dbe_list, &dbe_list);
                spin_unlock_irq(&dbe_lock);
        }