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0c630d95b5
The build/bootstrap/ar.com program is now tinier. This change reduces its size from 140kb to 53kb. Nothing was traded away. Cosmopolitan Ar performance is now 2x better than llvm-ar largely thanks to using the copy_file_range() system call. This change homebrews a new allocation API that addresses the shortcomings of the C standard library design. Using these new balloc() and reballoc() functions I managed to reduce memory consumption so much that Cosmpolitan Ar should now use roughly 100x fewer bytes of peak resident memory compared to llvm-ar. Correct behavior with better compatibility has been assured. Binary output is now pretty much bit-identical to llvm-ar, as of this change. This can and should be the living proof we need to show that a better world is possible for software.
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
#ifndef COSMOPOLITAN_LIBC_ELF_STRUCT_SHDR_H_
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#define COSMOPOLITAN_LIBC_ELF_STRUCT_SHDR_H_
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#include "libc/elf/scalar.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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/**
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* Section header.
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* @see https://docs.oracle.com/cd/E19683-01/816-1386/chapter6-94076/index.html
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*/
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typedef struct Elf64_Shdr {
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Elf64_Word sh_name;
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Elf64_Word sh_type; /* SHT_{PROGBITS,NOBITS,STRTAB,SYMTAB,RELA,...} */
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Elf64_Xword sh_flags; /* SHF_{WRITE,ALLOC,EXECINSTR,MERGE,STRINGS,...} */
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Elf64_Addr sh_addr;
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Elf64_Off sh_offset;
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Elf64_Xword sh_size;
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/*
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* Index of linked section header.
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*
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* If `sh_type` is `SHT_RELA` then `sh_link` holds the section header
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* index of the associated symbol table.
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*
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* If `sh_type` is `SHT_SYMTAB` then `sh_link` holds the section
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* header index of the associated string table.
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*/
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Elf64_Word sh_link;
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/*
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* If `sh_type` is `SHT_RELA` then `sh_info` contains the index of the
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* section to which relocations apply.
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*
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* If `sh_type` is `SHT_SYMTAB` or `SHT_DYNSYM` then `sh_info`
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* contains an index that's one greater than symbol table index of
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* last `STB_LOCAL` symbol.
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*/
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Elf64_Word sh_info;
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Elf64_Xword sh_addralign;
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Elf64_Xword sh_entsize;
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} Elf64_Shdr;
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_ELF_STRUCT_SHDR_H_ */
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