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mips: fix another bug in the module relocation change: the wrong base address for 24 bit jump -> long jump fixup table was used

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SVN-Revision: 16904
v19.07.3_mercusys_ac12_duma
Felix Fietkau 15 years ago
parent cf2c544844
commit 1685ce5f3d
2 changed files with 18 additions and 24 deletions
Show Stats Download Patch File Download Diff File

21
target/linux/generic-2.6/patches-2.6.28/026-mips_module_reloc.patch
Unescape Escape View File

@ -209,13 +209,13 @@
return 0;
}
@@ -97,27 +248,44 @@ static int apply_r_mips_32_rela(struct m
@@ -97,27 +248,41 @@ static int apply_r_mips_32_rela(struct m
return 0;
}
-static int apply_r_mips_26_rel(struct module *me, u32 *location, Elf_Addr v)
+static Elf_Addr add_plt_entry_to(unsigned *plt_offset,
+ void *start, unsigned size, Elf_Addr v)
+ void *start, Elf_Addr v)
{
- if (v % 4) {
- printk(KERN_ERR "module %s: dangerous relocation\n", me->name);
@ -229,17 +229,14 @@
- me->name);
- return -ENOEXEC;
- }
+ 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 */
@ -253,12 +250,12 @@
+ if (location >= me->module_core &&
+ location < me->module_core + me->core_size)
+ return add_plt_entry_to(&me->arch.core_plt_offset,
+ me->module_core, me->core_size, v);
+ me->arch.plt_tbl, v);
+
+ if (location >= me->module_init &&
+ location < me->module_init + me->init_size)
+ return add_plt_entry_to(&me->arch.init_plt_offset,
+ me->module_init, me->init_size, v);
+ me->arch.plt_tbl, v);
return 0;
}
@ -268,7 +265,7 @@
{
if (v % 4) {
printk(KERN_ERR "module %s: dangerous relocation\n", me->name);
@@ -125,17 +293,31 @@ static int apply_r_mips_26_rela(struct m
@@ -125,17 +290,31 @@ static int apply_r_mips_26_rela(struct m
}
if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
@ -303,7 +300,7 @@
static int apply_r_mips_hi16_rel(struct module *me, u32 *location, Elf_Addr v)
{
struct mips_hi16 *n;
@@ -400,11 +582,23 @@ int module_finalize(const Elf_Ehdr *hdr,
@@ -400,11 +579,23 @@ int module_finalize(const Elf_Ehdr *hdr,
list_add(&me->arch.dbe_list, &dbe_list);
spin_unlock_irq(&dbe_lock);
}

21
target/linux/generic-2.6/patches-2.6.30/027-mips_module_reloc.patch
Unescape Escape View File

@ -209,13 +209,13 @@
return 0;
}
@@ -97,27 +248,44 @@ static int apply_r_mips_32_rela(struct m
@@ -97,27 +248,41 @@ static int apply_r_mips_32_rela(struct m
return 0;
}
-static int apply_r_mips_26_rel(struct module *me, u32 *location, Elf_Addr v)
+static Elf_Addr add_plt_entry_to(unsigned *plt_offset,
+ void *start, unsigned size, Elf_Addr v)
+ void *start, Elf_Addr v)
{
- if (v % 4) {
- printk(KERN_ERR "module %s: dangerous relocation\n", me->name);
@ -229,17 +229,14 @@
- me->name);
- return -ENOEXEC;
- }
+ 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 */
@ -253,12 +250,12 @@
+ if (location >= me->module_core &&
+ location < me->module_core + me->core_size)
+ return add_plt_entry_to(&me->arch.core_plt_offset,
+ me->module_core, me->core_size, v);
+ me->arch.plt_tbl, v);
+
+ if (location >= me->module_init &&
+ location < me->module_init + me->init_size)
+ return add_plt_entry_to(&me->arch.init_plt_offset,
+ me->module_init, me->init_size, v);
+ me->arch.plt_tbl, v);
return 0;
}
@ -268,7 +265,7 @@
{
if (v % 4) {
printk(KERN_ERR "module %s: dangerous relocation\n", me->name);
@@ -125,17 +293,31 @@ static int apply_r_mips_26_rela(struct m
@@ -125,17 +290,31 @@ static int apply_r_mips_26_rela(struct m
}
if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
@ -303,7 +300,7 @@
static int apply_r_mips_hi16_rel(struct module *me, u32 *location, Elf_Addr v)
{
struct mips_hi16 *n;
@@ -400,11 +582,23 @@ int module_finalize(const Elf_Ehdr *hdr,
@@ -400,11 +579,23 @@ int module_finalize(const Elf_Ehdr *hdr,
list_add(&me->arch.dbe_list, &dbe_list);
spin_unlock_irq(&dbe_lock);
}

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