mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
e75ffde09e
You can now build Cosmopolitan with Clang:
make -j8 MODE=llvm
o/llvm/examples/hello.com
The assembler and linker code is now friendly to LLVM too.
So it's not needed to configure Clang to use binutils under
the hood. If you love LLVM then you can now use pure LLVM.
114 lines
4.4 KiB
C
114 lines
4.4 KiB
C
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 sw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#ifndef APE_IDATA_H_
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#define APE_IDATA_H_
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#ifdef __ASSEMBLER__
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#include "ape/relocations.h"
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/* clang-format off */
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// Links function from external DLL.
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//
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// This embeds a function pointer in the binary. The NT Executive
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// fills its value before control is handed off to the program.
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//
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// @note only ELF toolchains are powerful enough to use this
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// @see libc/nt/master.sh
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// @see ape/ape.lds
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// @see winimp
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.macro .imp dll:req fn:req actual:req hint
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.dll \dll
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.section .piro.data.sort.iat.2.\dll\().2.\actual,"aw",@progbits
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.type \fn,@object
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.align __SIZEOF_POINTER__
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\fn: .quad RVA((\dll\().\actual))
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.size \fn,.-\fn
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.globl \fn
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.hidden \fn
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.previous
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.section .idata.ro.ilt.\dll\().2.\actual,"a",@progbits
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.Lidata.ilt.\dll\().\actual:
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.quad RVA((\dll\().\actual))
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.type .Lidata.ilt.\dll\().\actual,@object
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.size .Lidata.ilt.\dll\().\actual,.-.Lidata.ilt.\dll\().\actual
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.previous
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.section .idata.ro.hnt.\dll\().2.\actual,"a",@progbits
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\dll\().\actual:
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.ifnb \hint # hint i.e. guess function ordinal
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.short \hint
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.else
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.short 0
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.endif
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.asciz "\actual"
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.align 2 # documented requirement
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.globl \dll\().\actual
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.hidden \dll\().\actual
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.type \dll\().\actual,@object
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.size \dll\().\actual,.-\dll\().\actual
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.previous
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.endm
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// Defines DLL import.
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// @note this is an implementation detail of .imp
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.macro .dll name:req
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.section .idata.ro.idt.2.\name,"aG",@progbits,\name,comdat
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.equ .Lidata.idt.\name,.
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.long RVA(idata.ilt.\name) # ImportLookupTable
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.long 0 # TimeDateStamp
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.long 0 # ForwarderChain
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.long RVA(.Lidata.str.\name) # DllNameRva
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.long RVA(idata.iat.\name) # ImportAddressTable
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.type .Lidata.idt.\name,@object
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.size .Lidata.idt.\name,.-.Lidata.idt.\name
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.previous
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.section .idata.ro.ilt.\name\().1,"aG",@progbits,\name,comdat
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.align __SIZEOF_POINTER__
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.type idata.ilt.\name,@object
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idata.ilt.\name:
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.previous/*
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...
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decentralized content
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...
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*/.section .idata.ro.ilt.\name\().3,"aG",@progbits,\name,comdat
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.quad 0
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.previous
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.section .idata.ro.hnt.\name\().1,"aG",@progbits,\name,comdat
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.align __SIZEOF_POINTER__
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.type idata.hnt.\name,@object
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.equ idata.hnt.\name,.
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.previous
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.section .piro.data.sort.iat.2.\name\().1,"awG",@progbits,\name,comdat
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.align __SIZEOF_POINTER__
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.type idata.iat.\name,@object
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idata.iat.\name:
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.previous/*
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...
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decentralized content
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...
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*/.section .piro.data.sort.iat.2.\name\().3,"awG",@progbits,\name,comdat
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.quad 0
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.previous
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.section .rodata.str1.1,"aSM",@progbits,1
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.Lidata.str.\name:
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.asciz "\name\().dll"
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.previous
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.endm
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/* clang-format on */
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#endif /* __ASSEMBLER__ */
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#endif /* APE_IDATA_H_ */
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