mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-08-04 00:40:27 +00:00
Improve dead code elimination
This commit is contained in:
Justine Tunney
parent
760db8c5ad
commit
0e36cb3ac4
6606 changed files with 9685 additions and 9854 deletions
119
ape/ape.lds
119
ape/ape.lds
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@ -176,6 +176,7 @@
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#ifdef __LINKER__
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#include "ape/macros.internal.h"
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#include "ape/config.h"
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#include "libc/dce.h"
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#include "libc/nt/pedef.internal.h"
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#include "libc/zip.h"
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@ -245,7 +246,7 @@ SECTIONS {
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. += 1;
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KEEP(*(.ape.pad.head))
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. = ALIGN(4096); /* alignments only mandatory when impossible otherwise */
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. = ALIGN(SupportsWindows() ? PAGESIZE : 16);
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HIDDEN(_ehead = .);
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} AT>SmallCode :Head
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@ -345,6 +346,22 @@ SECTIONS {
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KEEP(*(SORT_BY_NAME(.idata.ro.*)))
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. += 1;
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. = ALIGN(__SIZEOF_POINTER__);
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PROVIDE_HIDDEN(__init_array_start = .);
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KEEP(*(SORT_BY_INIT_PRIORITY(.init_array.*)
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SORT_BY_INIT_PRIORITY(.ctors.*)))
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KEEP(*(SORT_NONE(.ctors)))
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KEEP(*(SORT_NONE(.init_array)))
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KEEP(*(SORT_NONE(.preinit_array)))
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PROVIDE_HIDDEN(__init_array_end = .);
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. = ALIGN(__SIZEOF_POINTER__);
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PROVIDE_HIDDEN(__fini_array_start = .);
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KEEP(*(SORT_BY_INIT_PRIORITY(.fini_array.*)
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SORT_BY_INIT_PRIORITY(.dtors.*)))
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KEEP(*(SORT_NONE(.dtors)))
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PROVIDE_HIDDEN(__fini_array_end = .);
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/* Encoded Data Structures w/ Linear Initialization Order */
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KEEP(*(.initroprologue))
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KEEP(*(SORT_BY_NAME(.initro.*)))
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@ -379,24 +396,6 @@ SECTIONS {
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. = ALIGN(.Lape.piro.align);
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HIDDEN(__piro_start = .);
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QUAD(IMAGE_BASE_VIRTUAL);
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PROVIDE_HIDDEN(__init_array_start = .);
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KEEP(*(SORT_BY_INIT_PRIORITY(.init_array.*)
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SORT_BY_INIT_PRIORITY(.ctors.*)))
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KEEP(*(SORT_NONE(.ctors)))
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KEEP(*(SORT_NONE(.init_array)))
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KEEP(*(SORT_NONE(.preinit_array)))
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PROVIDE_HIDDEN(__init_array_end = .);
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. += 1;
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. = ALIGN(__SIZEOF_POINTER__);
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PROVIDE_HIDDEN(__fini_array_start = .);
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KEEP(*(SORT_BY_INIT_PRIORITY(.fini_array.*)
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SORT_BY_INIT_PRIORITY(.dtors.*)))
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KEEP(*(SORT_NONE(.dtors)))
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PROVIDE_HIDDEN(__fini_array_end = .);
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KEEP(*(SORT_BY_NAME(.piro.relo.sort.*)))
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PROVIDE_HIDDEN(__relo_end = .);
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KEEP(*(SORT_BY_NAME(.piro.data.sort.*)))
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@ -481,25 +480,17 @@ PFSTUB8(.Lape.elf.shoff, 0);
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PFSTUB4(.Lape.elf.phnum, (.Lape.phdrs.end - ape.phdrs) / 56);
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PFSTUB4(.Lape.elf.shnum, 0);
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PFSTUB4(.Lape.elf.shstrndx, 0);
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SHSTUB2(.Lape.macho.dd.skip, RVA(ape.macho) / 8);
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SHSTUB2(.Lape.macho.dd.count, (.Lape.macho.end - ape.macho) / 8);
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PFSTUB4(.Lape.pe.offset, ape.pe - ape.mz);
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HIDDEN(__privileged_addr = ROUNDDOWN(__privileged_start, PAGESIZE));
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HIDDEN(__privileged_size = (ROUNDUP(__privileged_end, PAGESIZE) -
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ROUNDDOWN(__privileged_start, PAGESIZE)));
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HIDDEN(.Lape.pe.optsz = .Lape.pe.sections - (ape.pe + 24));
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HIDDEN(.Lape.pe.shnum = (.Lape.pe.sections_end - .Lape.pe.sections) / 40);
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HIDDEN(.Lidata.idtsize = idata.idtend - idata.idt);
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HIDDEN(.Lidata.iatsize = idata.iatend - idata.iat);
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HIDDEN(.Lape.rom.offset = 0);
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HIDDEN(.Lape.rom.vaddr = ADDR(.head));
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HIDDEN(.Lape.rom.paddr = LOADADDR(.head));
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HIDDEN(.Lape.rom.filesz = LOADADDR(.data) - .Lape.rom.paddr);
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HIDDEN(.Lape.rom.memsz = ADDR(.data) - ADDR(.head));
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HIDDEN(.Lape.rom.align = 0x1000);
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HIDDEN(.Lape.rom.align = .Lape.data.align);
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HIDDEN(.Lape.rom.rva = RVA(.Lape.rom.vaddr));
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HIDDEN(.Lape.ram.offset = .Lape.rom.offset + .Lape.rom.filesz);
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@ -507,7 +498,7 @@ HIDDEN(.Lape.ram.vaddr = ADDR(.data));
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HIDDEN(.Lape.ram.paddr = LOADADDR(.data));
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HIDDEN(.Lape.ram.filesz = LOADADDR(.bss) - LOADADDR(.data));
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HIDDEN(.Lape.ram.memsz = ADDR(.bss) + SIZEOF(.bss) - .Lape.ram.vaddr);
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HIDDEN(.Lape.ram.align = 0x1000);
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HIDDEN(.Lape.ram.align = .Lape.data.align);
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HIDDEN(.Lape.ram.rva = RVA(.Lape.ram.vaddr));
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HIDDEN(.Lape.note.offset = .Lape.rom.offset + (.Lape.note - .Lape.rom.vaddr));
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@ -530,7 +521,7 @@ HIDDEN(.Lape.data.paddr = LOADADDR(.data));
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HIDDEN(.Lape.data.vaddr = ADDR(.data));
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HIDDEN(.Lape.data.filesz = SIZEOF(.data));
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HIDDEN(.Lape.data.memsz = SIZEOF(.data));
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HIDDEN(.Lape.data.align = 0x1000);
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HIDDEN(.Lape.data.align = .Lape.data.align);
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HIDDEN(.Lape.data.rva = RVA(.Lape.data.vaddr));
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HIDDEN(.Lape.bss.offset = .Lape.ram.offset + LOADADDR(.bss) - .Lape.ram.paddr);
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@ -540,18 +531,30 @@ HIDDEN(.Lape.bss.filesz = 0);
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HIDDEN(.Lape.bss.memsz = SIZEOF(.bss));
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HIDDEN(.Lape.bss.align = .Lape.data.align);
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/* Program Loader Auto-Tune */
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#if SupportsXnu()
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SHSTUB2(.Lape.macho.dd.skip, RVA(ape.macho) / 8);
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SHSTUB2(.Lape.macho.dd.count, (.Lape.macho.end - ape.macho) / 8);
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#endif
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#if SupportsWindows()
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PFSTUB4(.Lape.pe.offset, ape.pe - ape.mz);
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HIDDEN(.Lape.pe.optsz = .Lape.pe.sections - (ape.pe + 24));
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HIDDEN(.Lape.pe.shnum = (.Lape.pe.sections_end - .Lape.pe.sections) / 40);
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HIDDEN(.Lidata.idtsize = idata.idtend - idata.idt);
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HIDDEN(.Lidata.iatsize = idata.iatend - idata.iat);
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HIDDEN(v_ntsubsystem = (DEFINED(GetMessage)
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? kNtImageSubsystemWindowsGui
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: kNtImageSubsystemWindowsCui));
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#endif
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#if SupportsMetal()
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HIDDEN(v_ape_realsectors =
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MIN(REAL_SCRATCH_AREA - IMAGE_BASE_REAL,
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ROUNDUP(RVA(_edata), 4096)) / 512);
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HIDDEN(v_ape_realpages = v_ape_realsectors / (4096 / 512));
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HIDDEN(v_ape_highsectors =
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(ROUNDUP(RVA(_edata), 512) / 512) - v_ape_realsectors);
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/* Windows NT Auto-Subsystem Embedding */
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HIDDEN(v_ntsubsystem = (DEFINED(GetMessage)
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? kNtImageSubsystemWindowsGui
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: kNtImageSubsystemWindowsCui));
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#endif
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/* ZIP End of Central Directory header */
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#define ZIPCONST(NAME, VAL) HIDDEN(NAME = DEFINED(__zip_start) ? VAL : 0);
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@ -560,7 +563,8 @@ ZIPCONST(v_zip_cdirsize, __zip_end - __zip_start);
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ZIPCONST(v_zip_records, v_zip_cdirsize / kZipCdirHdrLinkableSize);
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ZIPCONST(v_zip_commentsize, _edata - __zip_end - kZipCdirHdrMinSize);
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/* Generates deterministic ID for Mach-O. */
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#if SupportsXnu()
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/* Generates deterministic ID. */
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#define PHI 0x9e3779b9925d4c17
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#define XOR(X,Y) ((X | Y) - (X & Y))
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#define XORSHIFT(X,Y) \
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@ -573,14 +577,12 @@ ZIPCONST(v_zip_commentsize, _edata - __zip_end - kZipCdirHdrMinSize);
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X = (X + (Y >> 020) & 0xFF) * PHI; \
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X = (X + (Y >> 030) & 0xFF) * PHI
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#define CHURN(X) \
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XORSHIFT(uuid1_, X); \
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KMH(uuid1_, X); \
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XORSHIFT(uuid2_, X); \
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KMH(uuid2_, X)
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HIDDEN(uuid1_ = 88172645463325252);
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HIDDEN(uuid2_ = 88172645463325252);
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XORSHIFT(.Lape.uuid1, X); \
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KMH(.Lape.uuid1, X); \
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XORSHIFT(.Lape.uuid2, X); \
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KMH(.Lape.uuid2, X)
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HIDDEN(.Lape.uuid1 = 88172645463325252);
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HIDDEN(.Lape.uuid2 = 88172645463325252);
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CHURN(.Lape.bss.align);
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CHURN(.Lape.bss.filesz);
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CHURN(.Lape.bss.memsz);
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@ -608,12 +610,6 @@ CHURN(.Lape.note.memsz);
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CHURN(.Lape.note.offset);
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CHURN(.Lape.note.paddr);
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CHURN(.Lape.note.vaddr);
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CHURN(.Lape.pe.offset);
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CHURN(.Lape.pe.optsz);
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CHURN(.Lape.pe.sections);
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CHURN(.Lape.pe.sections_end);
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CHURN(.Lape.pe.shnum);
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CHURN(.Lape.phdrs.end);
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CHURN(.Lape.ram.align);
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CHURN(.Lape.ram.filesz);
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CHURN(.Lape.ram.memsz);
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@ -636,15 +632,28 @@ CHURN(.Lape.text.paddr);
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CHURN(.Lape.text.rva);
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CHURN(.Lape.text.vaddr);
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CHURN(ADDR(.bss));
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CHURN(WinMain);
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CHURN(_start);
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CHURN(ape.phdrs);
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#if SupportsMetal()
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CHURN(v_ape_realsectors);
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#endif
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#if SupportsXnu()
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CHURN(ape.macho);
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#endif
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#if SupportsWindows()
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CHURN(ape.mz);
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CHURN(ape.pe);
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CHURN(ape.phdrs);
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CHURN(v_ape_realsectors);
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CHURN(.Lape.pe.offset);
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CHURN(.Lape.pe.optsz);
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CHURN(.Lape.pe.sections);
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CHURN(.Lape.pe.sections_end);
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CHURN(.Lape.pe.shnum);
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CHURN(.Lape.phdrs.end);
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CHURN(WinMain);
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#endif /* SupportsWindows() */
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#endif /* SupportsXnu() */
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ASSERT(ape.mz == IMAGE_BASE_VIRTUAL, "linker panic");
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ASSERT(DEFINED(ape.mz) ? ape.mz == IMAGE_BASE_VIRTUAL : 1, "linker panic");
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ASSERT((DEFINED(__init_bss_end) ? __init_bss_end : 0) % __SIZEOF_POINTER__ == 0,
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"__init_bss misalign");
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ASSERT(((DEFINED(__init_rodata_end) ? __init_rodata_end : 0) %
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