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hv: multi-arch: refine relocation related code

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Move dynamic sections and relocation sections data structures to
elf.h and enclose function relocate with CONFIG_RELOC. The input
parameter struct Elf64_Dyn *dynamic is not used by x86-64 now because
x86-64 can use pc-relative addressing to get the acutaly load address
of _DYNAMIC in the C code.

Tracked-On: #8825
Signed-off-by: Jian Jun Chen <jian.jun.chen@intel.com>
Acked-by: Wang, Yu1 <yu1.wang@intel.com>
This commit is contained in:
Jian Jun Chen
2025-09-30 08:22:31 +08:00
committed by acrnsi-robot
parent f094632178
commit f904dbffbb
4 changed files with 59 additions and 46 deletions
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30
hypervisor/boot/include/elf.h
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@@ -158,4 +158,34 @@ struct elf32_sec_entry
uint32_t sh_entsize;
};
/* Dynamic structure */
struct Elf64_Dyn {
uint64_t d_tag;
uint64_t d_ptr;
};
/* external symbols that are helpful for relocation */
extern struct Elf64_Dyn *_DYNAMIC;
/* Dynamic Array Tags - d_tag */
#define DT_NULL 0U /* end of .dynamic section */
#define DT_RELA 7U /* relocation table */
#define DT_RELASZ 8U /* size of reloc table */
#define DT_RELAENT 9U /* size of one entry */
/* Relocation entry with explicit addend */
struct Elf64_Rel {
uint64_t r_offset;
uint64_t r_info;
int64_t r_addend;
};
static inline uint64_t elf64_r_type(uint64_t i)
{
return (i & 0xffffffffUL);
}
/* x86-64 relocation types */
#define R_X86_64_RELATIVE 8U
#endif /* !ELF_H */