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https://github.com/drasko/codezero.git
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2d5a08ff32
Increased inode block pointers to 40. The current maximum allowed (and checked). Updates to file size after every file write ensures subsequent writes can correctly operate using updated file size information (i.e. not try to add more pages that are already present). We cannot do this inside write() because directory writes rely on byte-granularity updates on file buffers, whereas file updates are by page-granularity (currently).
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/*
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* Definitions for Executable Linking Format
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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 __ELF_H__
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#define __ELF_H__
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#include <l4/types.h>
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/* ELF identification indices */
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#define EI_MAG0 0
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#define EI_MAG1 1
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#define EI_MAG2 2
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#define EI_MAG3 3
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#define EI_CLASS 4
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#define EI_DATA 5
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#define EI_VERSION 6
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#define EI_PAD 7
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/* Size of ELF identification field */
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#define EI_NIDENT 16
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/* Values for ELF identification fields */
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#define ELFMAG0 0x7f
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#define ELFMAG1 'E'
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#define ELFMAG2 'L'
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#define ELFMAG3 'F'
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/* Values for the ELF Class field */
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#define ELFCLASSNONE 0
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#define ELFCLASS32 1
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#define ELFCLASS64 2
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/* Values for the ELF Data field */
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#define ELFDATANONE 0
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#define ELFDATA2LSB 1
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#define ELFDATA2MSB 2
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struct elf_header {
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u8 e_ident[EI_NIDENT]; /* ELF identification */
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u16 e_type; /* Object file type */
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u16 e_machine; /* Machine architecture */
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u32 e_version; /* Object file version */
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u32 e_entry; /* Virtual entry address */
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u32 e_phoff; /* Program header offset */
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u32 e_shoff; /* Section header offset */
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u32 e_flags; /* Processor specific flags */
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u16 e_ehsize; /* ELF header size */
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u16 e_phentsize; /* Program header entry size */
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u16 e_phnum; /* Number of program headers */
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u16 e_shentsize; /* Section header entry size */
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u16 e_shnum; /* Number of section headers */
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u16 e_shstrndx; /* Shtable index for strings */
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} __attribute__((__packed__));
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int elf_parse_executable(struct tcb *task, struct vm_file *file,
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struct exec_file_desc *efd);
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#endif /* __ELF_H__ */
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