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60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/*
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* Definitions for ELF Symbol tables, symbols
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* Based on Portable Formats Specification v1.1
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*
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* Copyright (C) 2008 Bahadir Balban
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*/
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#ifndef __ELFSYM_H__
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#define __ELFSYM_H__
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#include <l4/types.h>
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struct elf_symbol_entry {
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u32 st_name; /* Index into string table */
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u32 st_value; /* Symbol value; address, aboslute etc. */
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u32 st_size; /* Number of bytes contained in object */
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u8 st_info; /* Type and binding attributes */
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u8 st_other; /* Unused, 0 */
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u16 st_shndx; /* Section header index associated with entry */
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} __attribute__((__packed__));
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/* To manipulate binding and type attributes on st_info field */
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#define ELF32_ST_BIND(i) ((i) >> 4)
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#define ELF32_ST_TYPE(i) ((i) & 0xF)
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#define ELF32_ST_INFO(b, t) (((b) << 4) + ((t) & 0xF))
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/* Symbol binding codes */
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#define STB_LOCAL 0
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#define STB_GLOBAL 1
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#define STB_WEAK 2
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#define STB_LOPROC 13
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#define STB_HIPROC 15
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/* Symbol types */
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#define STT_NOTYPE 0
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#define STT_OBJECT 1
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#define STT_FUNC 2
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#define STT_SECTION 3
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#define STT_FILE 4
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#define STT_LOPROC 13
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#define STT_HIPROC 15
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/* Relocation structures */
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struct elf_rel {
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u32 r_offset;
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u32 r_info;
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} __attribute__((__packed__));
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struct elf_rela {
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u32 r_offset;
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u32 r_info;
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s32 r_addend;
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} __attribute__((__packed__));
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/* Macros to manipulate r_info field */
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#define ELF32_R_SYM(i) ((i) >> 8)
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#define ELF32_R_TYPE(i) ((u8)(i))
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#define ELF32_R_INFO(s,t) (((s) << 8) + (u8)(t))
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#endif /* __ELFSYM_H__ */
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