mirror of
https://github.com/netwide-assembler/nasm.git
synced 2024-12-27 09:29:06 +08:00
495fda6341
A global or extern definition can now contain the keyword "weak" (or "strong", although that is the default) to create a weak symbol or a weak external reference, respectively. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
134 lines
5.2 KiB
C
134 lines
5.2 KiB
C
/* ----------------------------------------------------------------------- *
|
|
*
|
|
* Copyright 1996-2019 The NASM Authors - All Rights Reserved
|
|
* See the file AUTHORS included with the NASM distribution for
|
|
* the specific copyright holders.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
|
|
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
|
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* ----------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Internal definitions common to outelf32 and outelf64
|
|
*/
|
|
#ifndef OUTPUT_OUTELF_H
|
|
#define OUTPUT_OUTELF_H
|
|
|
|
#include "elf.h"
|
|
#include "rbtree.h"
|
|
#include "saa.h"
|
|
|
|
#define GLOBAL_TEMP_BASE 0x40000000 /* bigger than any sane symbol index */
|
|
|
|
/* alignment of sections in file */
|
|
#define SEC_FILEALIGN 16
|
|
|
|
/* this stuff is needed for the dwarf/stabs debugging format */
|
|
#define TY_DEBUGSYMLIN 0x40 /* internal call to debug_out */
|
|
|
|
/*
|
|
* Debugging ELF sections (section indicies starting with sec_debug)
|
|
*/
|
|
|
|
/* stabs */
|
|
#define sec_stab (sec_debug + 0)
|
|
#define sec_stabstr (sec_debug + 1)
|
|
#define sec_rel_stab (sec_debug + 2)
|
|
|
|
/* stabs symbol table format */
|
|
struct stabentry {
|
|
uint32_t n_strx;
|
|
uint8_t n_type;
|
|
uint8_t n_other;
|
|
uint16_t n_desc;
|
|
uint32_t n_value;
|
|
};
|
|
|
|
/* dwarf */
|
|
#define sec_debug_aranges (sec_debug + 0)
|
|
#define sec_rela_debug_aranges (sec_debug + 1)
|
|
#define sec_debug_pubnames (sec_debug + 2)
|
|
#define sec_debug_info (sec_debug + 3)
|
|
#define sec_rela_debug_info (sec_debug + 4)
|
|
#define sec_debug_abbrev (sec_debug + 5)
|
|
#define sec_debug_line (sec_debug + 6)
|
|
#define sec_rela_debug_line (sec_debug + 7)
|
|
#define sec_debug_frame (sec_debug + 8)
|
|
#define sec_debug_loc (sec_debug + 9)
|
|
|
|
extern uint8_t elf_osabi;
|
|
extern uint8_t elf_abiver;
|
|
|
|
#define WRITE_STAB(p,n_strx,n_type,n_other,n_desc,n_value) \
|
|
do { \
|
|
WRITELONG(p, n_strx); \
|
|
WRITECHAR(p, n_type); \
|
|
WRITECHAR(p, n_other); \
|
|
WRITESHORT(p, n_desc); \
|
|
WRITELONG(p, n_value); \
|
|
} while (0)
|
|
|
|
struct elf_reloc {
|
|
struct elf_reloc *next;
|
|
int64_t address; /* relative to _start_ of section */
|
|
int64_t symbol; /* symbol index */
|
|
int64_t offset; /* symbol addend */
|
|
int type; /* type of relocation */
|
|
};
|
|
|
|
struct elf_symbol {
|
|
struct rbtree symv; /* symbol value and symbol rbtree */
|
|
int32_t strpos; /* string table position of name */
|
|
int32_t section; /* section ID of the symbol */
|
|
int type; /* symbol type */
|
|
int other; /* symbol visibility */
|
|
int32_t size; /* size of symbol */
|
|
int32_t globnum; /* symbol table offset if global */
|
|
struct elf_symbol *nextfwd; /* list of unresolved-size symbols */
|
|
char *name; /* used temporarily if in above list */
|
|
};
|
|
|
|
struct elf_section {
|
|
struct SAA *data;
|
|
uint64_t len;
|
|
uint64_t size;
|
|
uint64_t nrelocs;
|
|
int32_t index; /* NASM index or NO_SEG if internal */
|
|
int shndx; /* ELF index */
|
|
int type; /* SHT_* */
|
|
uint64_t align; /* alignment: power of two */
|
|
uint64_t flags; /* section flags */
|
|
int64_t pass_last_seen;
|
|
uint64_t entsize; /* entry size */
|
|
char *name;
|
|
struct SAA *rel;
|
|
struct elf_reloc *head;
|
|
struct elf_reloc **tail;
|
|
struct rbtree *gsyms; /* global symbols in section */
|
|
};
|
|
|
|
#endif /* OUTPUT_OUTELF_H */
|