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Code

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

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16831 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2009-07-13 15:09:46 +00:00
parent b7d298ab07
commit 9204381ccc
2 changed files with 32 additions and 24 deletions
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28
target/linux/generic-2.6/patches-2.6.28/026-mips_module_reloc.patch
View File

@ -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);
}

28
target/linux/generic-2.6/patches-2.6.30/027-mips_module_reloc.patch
View File

@ -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);
}