On 10/13/18 3:30 AM, Heinrich Schuchardt wrote:
Currently we support only relocations of type ELF64_R_TYPE or ELF32_R_TYPE.
We should be warned if other relocation types appear in the relocation
sections.

This type of message has helped to identify code overwriting a relocation
section before relocation and incorrect parsing of relocation tables.

Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
  arch/x86/lib/relocate.c | 18 ++++++++++++++++++
  1 file changed, 18 insertions(+)

diff --git a/arch/x86/lib/relocate.c b/arch/x86/lib/relocate.c
index ed10755d9c..01e619d20b 100644
--- a/arch/x86/lib/relocate.c
+++ b/arch/x86/lib/relocate.c
@@ -53,6 +53,15 @@ static void do_elf_reloc_fixups64(unsigned int text_base, 
uintptr_t size,
        Elf64_Addr *offset_ptr_ram;
do {
+               unsigned long long type = ELF64_R_TYPE(re_src->r_info);
+
+               if (type != R_X86_64_RELATIVE) {
+                       printf("%s: unsupported relocation type 0x%llx "
+                              "at %p, ",__func__, type, re_src);
+                       printf("offset = 0x%llx\n", re_src->r_offset);
+                       continue;
+               }
+
                /* Get the location from the relocation entry */
                offset_ptr_rom = (Elf64_Addr *)(uintptr_t)re_src->r_offset;
@@ -91,6 +100,15 @@ static void do_elf_reloc_fixups32(unsigned int text_base, uintptr_t size,
        Elf32_Addr *offset_ptr_ram;
do {
+               unsigned int type = ELF32_R_TYPE(re_src->r_info);
+
+               if (type != R_386_RELATIVE) {
+                       printf("%s: unsupported relocation type 0x%x "
+                              "at %p, ",__func__, type, re_src);
+                       printf("offset = 0x%x\n", re_src->r_offset);
+                       continue;
+               }
+
                /* Get the location from the relocation entry */
                offset_ptr_rom = (Elf32_Addr *)(uintptr_t)re_src->r_offset;
Hi Heinrich,
i just merged recent u-boot master into my devbranch and ran it on my board:

--
U-Boot 2018.11-rc2-00728-g85a448b (Oct 23 2018 - 10:50:53 +0200)

CPU: x86, vendor AMD, device 5a2h
DRAM:  119.6 MiB
do_elf_reloc_fixups32: unsupported relocation type 0x1 at 0204d3d0, offset = 0x2000087 do_elf_reloc_fixups32: unsupported relocation type 0x2 at 0204d3d8, offset = 0x2000091
Bus 0: OK
---

now i get such relocation warnings, can you help me in this how to deal with that?

I'm starting u-boot as a payload from coreboot.

thanks!

cheers,
Hannes

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