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https://github.com/jart/cosmopolitan.git
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8ff48201ca
This change takes an entirely new approach to the incremental linking of pkzip executables. The assets created by zipobj.com are now treated like debug data. After a .com.dbg is compiled, fixupobj.com should be run, so it can apply fixups to the offsets and move the zip directory to the end of the file. Since debug data doesn't get objcopy'd, a new tool has been introduced called zipcopy.com which should be run after objcopy whenever a .com file is created. This is all automated by the `cosmocc` toolchain which is rapidly becoming the new recommended approach. This change also introduces the new C23 checked arithmetic macros.
81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
#ifndef COSMOPOLITAN_TOOL_BUILD_LIB_ELFWRITER_H_
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#define COSMOPOLITAN_TOOL_BUILD_LIB_ELFWRITER_H_
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#include "libc/calls/struct/timespec.h"
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#include "libc/elf/struct/ehdr.h"
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#include "libc/elf/struct/rela.h"
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#include "libc/elf/struct/shdr.h"
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#include "libc/elf/struct/sym.h"
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#include "tool/build/lib/interner.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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struct ElfWriterSyms {
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size_t i, n;
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Elf64_Sym *p;
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};
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enum ElfWriterSymOrder {
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kElfWriterSymSection,
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kElfWriterSymLocal,
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kElfWriterSymGlobal
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};
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struct ElfWriterSymRef {
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int slg;
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uint32_t sym;
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};
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struct ElfWriterRela {
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uint64_t offset;
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struct ElfWriterSymRef symkey;
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uint32_t type;
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int64_t addend;
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};
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struct ElfWriter {
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char *path;
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int fd;
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void *map;
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size_t mapsize;
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size_t wrote;
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size_t entsize;
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size_t addralign;
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struct Elf64_Ehdr *ehdr;
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struct {
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size_t i, n;
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Elf64_Shdr *p;
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} shdrs[1];
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struct ElfWriterSyms syms[3][1];
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struct {
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size_t i, j, n;
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struct ElfWriterRela *p;
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} relas[1];
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struct Interner *strtab;
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struct Interner *shstrtab;
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};
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struct ElfWriter *elfwriter_open(const char *, int) dontdiscard;
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void elfwriter_cargoculting(struct ElfWriter *);
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void elfwriter_close(struct ElfWriter *);
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void elfwriter_align(struct ElfWriter *, size_t, size_t);
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size_t elfwriter_startsection(struct ElfWriter *, const char *, int, int);
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void *elfwriter_reserve(struct ElfWriter *, size_t);
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void elfwriter_commit(struct ElfWriter *, size_t);
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void elfwriter_finishsection(struct ElfWriter *);
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void elfwriter_appendrela(struct ElfWriter *, uint64_t, struct ElfWriterSymRef,
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uint32_t, int64_t);
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uint32_t elfwriter_relatype_pc32(const struct ElfWriter *);
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uint32_t elfwriter_relatype_abs32(const struct ElfWriter *);
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struct ElfWriterSymRef elfwriter_linksym(struct ElfWriter *, const char *, int,
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int);
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struct ElfWriterSymRef elfwriter_appendsym(struct ElfWriter *, const char *,
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int, int, size_t, size_t);
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void elfwriter_yoink(struct ElfWriter *, const char *, int);
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void elfwriter_setsection(struct ElfWriter *, struct ElfWriterSymRef, uint16_t);
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void elfwriter_zip(struct ElfWriter *, const char *, const char *, size_t,
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const void *, size_t, uint32_t, struct timespec,
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struct timespec, struct timespec, bool);
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_TOOL_BUILD_LIB_ELFWRITER_H_ */
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