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 Post subject: Error "unsupported relocation type 94" when insert module
PostPosted: Wed Dec 03, 2014 6:10 pm 

Joined: Wed Apr 13, 2011 7:44 pm
Posts: 23
Question: Kernel will hand when insert module built by v3

Platform: XC7 with N1068A+AG101P
Kernel: BSP321 built with nds32le-linux-glibc-v3
Module: ftgpio010

When inserting "ftgpio010.ko" module which is built by nds32le-linux-glibc-v3 toolchain,
kernel will display following message and hand.
ftgpio010: unsupported relocation type 94.

It is OK with module built with v2 or v1 toolchain.

It's due to v3 toolchain generate new relocation type and kernel doesn't support this type.

Patches for BSP321 kernel source.
diff --git a/arch/nds32/include/asm/elf.h b/arch/nds32/include/asm/elf.h
index 89ecdc0..ce2296c 100644
--- a/arch/nds32/include/asm/elf.h
+++ b/arch/nds32/include/asm/elf.h
@@ -79,6 +79,7 @@ do {                                    \
#define R_NDS32_DWARF2_OP1_RELA     77
#define R_NDS32_DWARF2_OP2_RELA     78
#define R_NDS32_DWARF2_LEB_RELA     79
+#define R_NDS32_WORD_9_PCREL_RELA   94
#define R_NDS32_RELA_NOP_MIX      192
#define R_NDS32_RELA_NOP_MAX      255

diff --git a/arch/nds32/kernel/module.c b/arch/nds32/kernel/module.c
index 0402edf..4018d90 100755
--- a/arch/nds32/kernel/module.c
+++ b/arch/nds32/kernel/module.c
@@ -260,7 +260,11 @@ apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab, unsigned int syminde
               return -ENOEXEC;
            do_reloc32( v - (Elf32_Addr)loc, loc, 0x01ffffff, 1, 0xff000000, 0, NEED_SWAP);
+         case R_NDS32_WORD_9_PCREL_RELA:
+            if(exceed_limit((v - (Elf32_Addr)loc), 0x000000ff, module, rel, relindex, i))
+               return -ENOEXEC;
+            do_reloc32( v - (Elf32_Addr)loc, loc, 0x000001ff, 1, 0xffffff00, 0, NEED_SWAP);
+            break;
         case R_NDS32_SDA15S3_RELA:
         case R_NDS32_SDA15S2_RELA:
         case R_NDS32_SDA15S1_RELA:

reloc_patch.txt [1.16 KiB]
Downloaded 1309 times
Commands to patch this file.
#cd linux2.6
#cp <file location>/reloc_patch.txt .
#patch -p1 < reloc_patch.txt

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