Implement architecture-specific ELF relocation handlers for ARM32 and ARM64.
The implementation reuses the existing relocate_image().

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>
Reviewed-by: Ahmad Fatoum <[email protected]>
Signed-off-by: Sascha Hauer <[email protected]>
---
 arch/arm/include/asm/elf.h |  7 +++++++
 arch/arm/lib32/reloc.c     | 19 +++++++++++++++++++
 arch/arm/lib64/reloc.c     | 21 +++++++++++++++++++--
 3 files changed, 45 insertions(+), 2 deletions(-)

diff --git a/arch/arm/include/asm/elf.h b/arch/arm/include/asm/elf.h
index 
0b4704a4a5615e648f67705ad9daf8dea9f41bab..630c85f2b421cba7e37ea7147c047be948ecdc7e
 100644
--- a/arch/arm/include/asm/elf.h
+++ b/arch/arm/include/asm/elf.h
@@ -36,6 +36,13 @@ typedef struct user_fp elf_fpregset_t;
 #define R_ARM_THM_CALL         10
 #define R_ARM_THM_JUMP24       30
 
+/* Additional relocation types for dynamic linking */
+#define R_ARM_RELATIVE         23
+
+#define R_AARCH64_NONE         0
+#define R_AARCH64_ABS64                257
+#define R_AARCH64_RELATIVE     1027
+
 /*
  * These are used to set parameters in the core dumps.
  */
diff --git a/arch/arm/lib32/reloc.c b/arch/arm/lib32/reloc.c
index 
378ba95b2ffd455436e704a803f5448fc2c2b18c..edd3d7eb486649d70a3ce5a77c25ad52ccd12bc1
 100644
--- a/arch/arm/lib32/reloc.c
+++ b/arch/arm/lib32/reloc.c
@@ -54,3 +54,22 @@ void __prereloc relocate_image(unsigned long offset,
        if (dynend)
                __memset(dynsym, 0, (unsigned long)dynend - (unsigned 
long)dynsym);
 }
+
+/*
+ * Apply ARM32 ELF relocations
+ */
+int elf_apply_relocations(struct elf_image *elf, const void *dyn_seg)
+{
+       void *rel_ptr = NULL, *symtab = NULL;
+       u64 relsz;
+       phys_addr_t base = (phys_addr_t)elf->reloc_offset;
+       int ret;
+
+       ret = elf_parse_dynamic_section_rel(elf, dyn_seg, &rel_ptr, &relsz, 
&symtab);
+       if (ret)
+               return ret;
+
+       relocate_image(base, rel_ptr, rel_ptr + relsz, symtab, NULL);
+
+       return 0;
+}
diff --git a/arch/arm/lib64/reloc.c b/arch/arm/lib64/reloc.c
index 
2288f9e2e336887c5edfbf6b080f487394754113..b4981578747007c84eca643db327807ce15ba7c9
 100644
--- a/arch/arm/lib64/reloc.c
+++ b/arch/arm/lib64/reloc.c
@@ -8,8 +8,6 @@
 #include <debug_ll.h>
 #include <asm/reloc.h>
 
-#define R_AARCH64_RELATIVE 1027
-
 /*
  * relocate binary to the currently running address
  */
@@ -45,3 +43,22 @@ void __prereloc relocate_image(unsigned long offset,
                dstart += sizeof(*rel);
        }
 }
+
+/*
+ * Apply ARM64 ELF relocations
+ */
+int elf_apply_relocations(struct elf_image *elf, const void *dyn_seg)
+{
+       void *rela_ptr = NULL, *symtab = NULL;
+       u64 relasz;
+       phys_addr_t base = (phys_addr_t)elf->reloc_offset;
+       int ret;
+
+       ret = elf_parse_dynamic_section_rela(elf, dyn_seg, &rela_ptr, &relasz, 
&symtab);
+       if (ret)
+               return ret;
+
+       relocate_image(base, rela_ptr, rela_ptr + relasz, symtab, NULL);
+
+       return 0;
+}

-- 
2.47.3


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