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objtool: Consolidate rel/rela handling

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The GElf_Rel[a] structs have more similarities than differences.  It's
safe to hard-code the assumptions about their shared fields as they will
never change.  Consolidate their handling where possible, getting rid of
duplicated code.

Also, at least for now we only ever create rela sections, so simplify
the relocation creation code to be rela-only.

Link: https://lore.kernel.org/r/dcabf6df400ca500ea929f1e4284f5e5ec0b27c8.1685464332.git.jpoimboe@kernel.org
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
This commit is contained in:
Josh Poimboeuf
2023-05-30 10:20:56 -07:00
parent a5bd623653
commit 53257a977a
3 changed files with 68 additions and 159 deletions
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13
tools/objtool/include/objtool/elf.h
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@@ -12,6 +12,7 @@
#include <linux/hashtable.h>
#include <linux/rbtree.h>
#include <linux/jhash.h>
#include <arch/elf.h>
#ifdef LIBELF_USE_DEPRECATED
# define elf_getshdrnum elf_getshnum
@@ -147,12 +148,14 @@ static inline bool has_multiple_files(struct elf *elf)
return elf->num_files > 1;
}
static inline int elf_class_addrsize(struct elf *elf)
static inline size_t elf_addr_size(struct elf *elf)
{
if (elf->ehdr.e_ident[EI_CLASS] == ELFCLASS32)
return sizeof(u32);
else
return sizeof(u64);
return elf->ehdr.e_ident[EI_CLASS] == ELFCLASS32 ? 4 : 8;
}
static inline size_t elf_rela_size(struct elf *elf)
{
return elf_addr_size(elf) == 4 ? sizeof(Elf32_Rela) : sizeof(Elf64_Rela);
}
#define for_each_sec(file, sec) \