mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-19 10:48:20 +07:00
df2b384366
Apparently there's people doing 64bit builds on 32bit machines.
Fixes: 74b873e49d ("objtool: Optimize find_rela_by_dest_range()")
Reported-by: youling257@gmail.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
135 lines
3.4 KiB
C
135 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
|
|
*/
|
|
|
|
#ifndef _OBJTOOL_ELF_H
|
|
#define _OBJTOOL_ELF_H
|
|
|
|
#include <stdio.h>
|
|
#include <gelf.h>
|
|
#include <linux/list.h>
|
|
#include <linux/hashtable.h>
|
|
#include <linux/rbtree.h>
|
|
#include <linux/jhash.h>
|
|
|
|
#ifdef LIBELF_USE_DEPRECATED
|
|
# define elf_getshdrnum elf_getshnum
|
|
# define elf_getshdrstrndx elf_getshstrndx
|
|
#endif
|
|
|
|
/*
|
|
* Fallback for systems without this "read, mmaping if possible" cmd.
|
|
*/
|
|
#ifndef ELF_C_READ_MMAP
|
|
#define ELF_C_READ_MMAP ELF_C_READ
|
|
#endif
|
|
|
|
struct section {
|
|
struct list_head list;
|
|
struct hlist_node hash;
|
|
struct hlist_node name_hash;
|
|
GElf_Shdr sh;
|
|
struct rb_root symbol_tree;
|
|
struct list_head symbol_list;
|
|
struct list_head rela_list;
|
|
struct section *base, *rela;
|
|
struct symbol *sym;
|
|
Elf_Data *data;
|
|
char *name;
|
|
int idx;
|
|
unsigned int len;
|
|
bool changed, text, rodata;
|
|
};
|
|
|
|
struct symbol {
|
|
struct list_head list;
|
|
struct rb_node node;
|
|
struct hlist_node hash;
|
|
struct hlist_node name_hash;
|
|
GElf_Sym sym;
|
|
struct section *sec;
|
|
char *name;
|
|
unsigned int idx;
|
|
unsigned char bind, type;
|
|
unsigned long offset;
|
|
unsigned int len;
|
|
struct symbol *pfunc, *cfunc, *alias;
|
|
bool uaccess_safe;
|
|
};
|
|
|
|
struct rela {
|
|
struct list_head list;
|
|
struct hlist_node hash;
|
|
GElf_Rela rela;
|
|
struct section *sec;
|
|
struct symbol *sym;
|
|
unsigned int type;
|
|
unsigned long offset;
|
|
int addend;
|
|
bool jump_table_start;
|
|
};
|
|
|
|
struct elf {
|
|
Elf *elf;
|
|
GElf_Ehdr ehdr;
|
|
int fd;
|
|
char *name;
|
|
struct list_head sections;
|
|
DECLARE_HASHTABLE(symbol_hash, 20);
|
|
DECLARE_HASHTABLE(symbol_name_hash, 20);
|
|
DECLARE_HASHTABLE(section_hash, 16);
|
|
DECLARE_HASHTABLE(section_name_hash, 16);
|
|
DECLARE_HASHTABLE(rela_hash, 20);
|
|
};
|
|
|
|
#define OFFSET_STRIDE_BITS 4
|
|
#define OFFSET_STRIDE (1UL << OFFSET_STRIDE_BITS)
|
|
#define OFFSET_STRIDE_MASK (~(OFFSET_STRIDE - 1))
|
|
|
|
#define for_offset_range(_offset, _start, _end) \
|
|
for (_offset = ((_start) & OFFSET_STRIDE_MASK); \
|
|
_offset <= ((_end) & OFFSET_STRIDE_MASK); \
|
|
_offset += OFFSET_STRIDE)
|
|
|
|
static inline u32 sec_offset_hash(struct section *sec, unsigned long offset)
|
|
{
|
|
u32 ol, oh, idx = sec->idx;
|
|
|
|
offset &= OFFSET_STRIDE_MASK;
|
|
|
|
ol = offset;
|
|
oh = (offset >> 16) >> 16;
|
|
|
|
__jhash_mix(ol, oh, idx);
|
|
|
|
return ol;
|
|
}
|
|
|
|
static inline u32 rela_hash(struct rela *rela)
|
|
{
|
|
return sec_offset_hash(rela->sec, rela->offset);
|
|
}
|
|
|
|
struct elf *elf_read(const char *name, int flags);
|
|
struct section *find_section_by_name(struct elf *elf, const char *name);
|
|
struct symbol *find_func_by_offset(struct section *sec, unsigned long offset);
|
|
struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset);
|
|
struct symbol *find_symbol_by_name(struct elf *elf, const char *name);
|
|
struct symbol *find_symbol_containing(struct section *sec, unsigned long offset);
|
|
struct rela *find_rela_by_dest(struct elf *elf, struct section *sec, unsigned long offset);
|
|
struct rela *find_rela_by_dest_range(struct elf *elf, struct section *sec,
|
|
unsigned long offset, unsigned int len);
|
|
struct symbol *find_func_containing(struct section *sec, unsigned long offset);
|
|
struct section *elf_create_section(struct elf *elf, const char *name, size_t
|
|
entsize, int nr);
|
|
struct section *elf_create_rela_section(struct elf *elf, struct section *base);
|
|
int elf_rebuild_rela_section(struct section *sec);
|
|
int elf_write(struct elf *elf);
|
|
void elf_close(struct elf *elf);
|
|
|
|
#define for_each_sec(file, sec) \
|
|
list_for_each_entry(sec, &file->elf->sections, list)
|
|
|
|
#endif /* _OBJTOOL_ELF_H */
|