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authorRobin Getz <robin.getz@analog.com>2009-06-25 15:49:38 +0000
committerMike Frysinger <vapier@gentoo.org>2009-09-16 21:28:46 -0400
commit22532578ee0f8725e0155e528c29ff992c1950c7 (patch)
tree28696c273cfcc8fba5475eba56d2ed0a9b8401a1 /arch/blackfin/kernel
parentc014e15a2f667f91b5c2d08a90d77197a89d8065 (diff)
Blackfin: reject outdated/unused/wrong relocation types
All kernel modules are required to be built with -mlong-calls and thus should not generate any of these relocations. If they do, it means the module has not been compiled properly, so rather than trying to handle them (and running into random run time errors) just error out on module load to force the module to be compiled correctly. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/kernel')
-rw-r--r--arch/blackfin/kernel/module.c42
1 files changed, 8 insertions, 34 deletions
diff --git a/arch/blackfin/kernel/module.c b/arch/blackfin/kernel/module.c
index d5aee362668..bb940784cf2 100644
--- a/arch/blackfin/kernel/module.c
+++ b/arch/blackfin/kernel/module.c
@@ -243,40 +243,6 @@ apply_relocate_add(Elf_Shdr * sechdrs, const char *strtab,
#endif
switch (ELF32_R_TYPE(rel[i].r_info)) {
- case R_BFIN_PCREL24:
- case R_BFIN_PCREL24_JUMP_L:
- /* Add the value, subtract its postition */
- location16 =
- (uint16_t *) (sechdrs[sechdrs[relsec].sh_info].
- sh_addr + rel[i].r_offset - 2);
- location32 = (uint32_t *) location16;
- value -= (uint32_t) location32;
- value >>= 1;
- if ((value & 0xFF000000) != 0 &&
- (value & 0xFF000000) != 0xFF000000) {
- printk(KERN_ERR "module %s: relocation overflow\n",
- mod->name);
- return -ENOEXEC;
- }
- pr_debug("value is %x, before %x-%x after %x-%x\n", value,
- *location16, *(location16 + 1),
- (*location16 & 0xff00) | (value >> 16 & 0x00ff),
- value & 0xffff);
- *location16 =
- (*location16 & 0xff00) | (value >> 16 & 0x00ff);
- *(location16 + 1) = value & 0xffff;
- break;
- case R_BFIN_PCREL12_JUMP:
- case R_BFIN_PCREL12_JUMP_S:
- value -= (uint32_t) location32;
- value >>= 1;
- *location16 = (value & 0xfff);
- break;
- case R_BFIN_PCREL10:
- value -= (uint32_t) location32;
- value >>= 1;
- *location16 = (value & 0x3ff);
- break;
case R_BFIN_LUIMM16:
pr_debug("before %x after %x\n", *location16,
(value & 0xffff));
@@ -302,6 +268,14 @@ apply_relocate_add(Elf_Shdr * sechdrs, const char *strtab,
pr_debug("before %x after %x\n", *location32, value);
*location32 = value;
break;
+ case R_BFIN_PCREL24:
+ case R_BFIN_PCREL24_JUMP_L:
+ case R_BFIN_PCREL12_JUMP:
+ case R_BFIN_PCREL12_JUMP_S:
+ case R_BFIN_PCREL10:
+ printk(KERN_ERR "module %s: Unsupported relocation: %u (no -mlong-calls?)\n"
+ mod->name, ELF32_R_TYPE(rel[i].r_info));
+ return -ENOEXEC;
default:
printk(KERN_ERR "module %s: Unknown relocation: %u\n",
mod->name, ELF32_R_TYPE(rel[i].r_info));